CN114098866A

Movatterモバイル変換

Info

Publication number: CN114098866A
Application number: CN202010885674.XA
Authority: CN
Inventors: 孙宝峰; 范功远; 邹明明; 李正治
Original assignee: Fengh Medical Co ltd
Current assignee: Fengh Medical Co ltd
Priority date: 2020-08-28
Filing date: 2020-08-28
Publication date: 2022-03-01
Anticipated expiration: 2040-08-28
Also published as: CN114098866B

Abstract

The invention discloses a surgical instrument, which comprises a main module and an electric module detachably arranged on the main module, wherein the main module and the electric module respectively comprise a first shell and a second shell, a motor of the electric module outputs electric power to a transmission mechanism of the main module to enable the transmission mechanism to work, the surgical instrument also comprises an operating part for inputting manual force to drive the transmission mechanism to work, the operating part is positioned in a shell formed by the first shell and the second shell when the electric module is in an installation state, the second shell is separated from the first shell when the electric module is in a disassembly state, and the operating part is exposed. According to the surgical instrument, the disassembly of the electric module is matched with the hiding of the operating part, so that the electric power and the manual power are forcibly selected to drive the transmission mechanism, and the safety is improved.

Description

Surgical instrument

Technical Field

The present invention relates to a surgical instrument.

Background

As is well known, the endocavity cutting stapler has been commonly used in the abdominal cavity and other intracavitary operations.

The traditional anastomat is a mechanical anastomat driven by manual force, when the anastomat is used in an operation, a doctor needs to use large force to operate so as to drive a transmission mechanism to perform actions such as jaw closing, squeezing and anastomosis, and the actions are very inconvenient in the operation. In recent years, electric anastomats are increasingly popular due to simple operation and labor saving. The electric anastomat adopts an electric bag and a motor as energy sources, the battery bag drives the motor to work, the motor is connected with and outputs power to a transmission mechanism to drive and execute actions such as closing of a jaw, squeezing, anastomosis and the like, and a doctor can start the motor and start the anastomat to work only by operating a key with small force, so that the operation is simple and labor-saving.

In order to increase the use safety of the electric anastomat, the electric anastomat is also provided with a manual knife withdrawing operation piece and a manual jaw loosening operation piece which are directly connected to the transmission mechanism without a motor, and a user manually operates to drive the transmission mechanism to respectively execute the knife withdrawing action and the jaw loosening action. When any one of actions of clamping tissues, squeezing tissues, anastomosing tissues, loosening jaws and withdrawing a knife is carried out by using the electric driving of the electric anastomat in a surgical operation, if electric power faults such as battery pack faults, motor faults, current faults and the like occur, the electric anastomat is triggered to automatically stop, and a key for operating the motor immediately fails. At this point, the jaws or cutting knives of the powered stapler may still be acting on the tissue of the patient and the stapler may not be able to continue to complete the procedure and should be immediately disengaged from the patient, however, the motor drive may not be able to effect the loosening or withdrawal. The manual knife withdrawing operation piece and the manual jaw loosening operation piece can help a doctor to withdraw the knife/loosen the jaw manually, so that the anastomat can be smoothly separated from the body of a patient, and the safety of the electric anastomat is improved.

The manual operating parts (manual knife withdrawing operating parts and manual jaw releasing operating parts) of the anastomat and the internal motor are always kept in mechanical connection with the driving mechanism. In terms of safe operation, it is recommended that the doctor should not operate the push button of the driving motor and turn to operate the manual operation member when the electric stapler is out of order from the above-mentioned electric power, and the motor and the manual operation member should not be used at the same time. In practical use, however, the working conditions are complex, and the worst case situation may occur: the user misjudges that the motor fails and the operation habit does not loosen the keys on the handle, the keys and the motor do not fail, and the user operates the manual operation piece at the same time, so that the manual operation piece and the manual operation piece cause the execution conflict of the transmission mechanism, the electric anastomat is damaged, and even the patient is injured.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide an electric anastomat, which is realized by the following technical scheme:

a surgical instrument comprising a main module and a powered module, the powered module comprising a motor that outputs electrical power when energized; the main module comprises at least part of a transmission mechanism, the transmission mechanism is connected to the electric module and works when obtaining the electric power output by the motor; the main module comprises a first shell and an operating piece, the first shell accommodates at least part of the transmission mechanism, and the operating piece is connected to the transmission mechanism to drive the transmission mechanism to work; the electric module comprises a second housing accommodating the motor; the electric module is detachably mounted on the main module, when the electric module is in a mounting state, the first shell and the second shell are matched and connected to form a shell, and the operating piece is positioned in the shell; when the electric module is in a disassembled state, the second shell is separated from the first shell, and at least part of the operating piece is exposed.

Further, the operating element comprises a manual force transmission part and a manual operation part, wherein the manual force transmission part is operated by a user to input manual force, the manual force transmission part is connected with the transmission mechanism, and the manual operation part is connected with the manual force transmission part.

Further, in the disassembled state of the electric module, the second housing is separated from the first housing, and the manual operation portion is exposed.

Further, the surgical instrument further includes an auxiliary operating member connected to the manual operating portion.

Further, the manual force transmission part has a rotation axis, and when the operating element is rotated around the rotation axis, a projection of the manual operation part on a plane perpendicular to the rotation axis is larger than a projection of the manual force transmission part on the plane.

Furthermore, the manual force transmission part is a rotating shaft, and the manual operation part is a hand wheel.

Further, the operating part is an L-shaped rod.

Further, the operating element comprises a manual force transmission part, and the manual force transmission part is connected with the transmission mechanism; the surgical instrument further includes an auxiliary operation piece connected to the manual-force transmission portion in a detached state of the electric module, the auxiliary operation piece being configured to transmit a manual force of the obtained user operation input to the manual-force transmission portion.

Further, the manual force transmission part is a rotating shaft, the rotating shaft is provided with a rotating axis, the auxiliary operating part comprises an auxiliary manual operation part for inputting manual force operated by a user, the auxiliary operating part drives the operating part to rotate around the rotating axis when the user operates the auxiliary operating part, and the projection of the auxiliary manual operation part on a plane perpendicular to the rotating axis is larger than that of the operating part on the plane.

Further, the transmission mechanism comprises an input piece, and when the input piece obtains the electric power or the manual power, the transmission mechanism is driven to work; the electric module comprises an electric power output piece for outputting power, the electric power output piece is connected to the input piece to provide electric power when the electric module is in an installation state, and the electric power output piece is disconnected from the input piece when the electric module is in a disassembly state; the operating member includes a manual-force transmitting portion connected to the input member to transmit the manual force to the input member.

Further, the electric power output member is detachably connected to the operating member, and the electric power output member is connected to the input member through the operating member.

Further, the electric power output member may be detachably connected to the manual power transmitting portion.

Furthermore, the operating element further comprises a manual operation part which is operated by a user to input manual force, the manual force transmission part is connected with the input element, and the manual operation part is connected with the manual force transmission part.

Further, the surgical instrument further includes an auxiliary operation member connected to the manual-force transmission portion in a detached state of the electric module, the auxiliary operation member being configured to transmit the manual force of the obtained user operation input to the manual-force transmission portion.

Further, the transmission mechanism comprises a switching mechanism, a cutting driving mechanism and a jaw driving mechanism, the switching mechanism comprises the input member, when the input member obtains one of the electric power and the manual power, the switching mechanism selects to transmit the power to one of the cutting driving mechanism and the jaw driving mechanism, the cutting driving mechanism executes a feeding action or a retracting action when the power is obtained, and the jaw driving mechanism executes a jaw closing action or a jaw opening action when the power is obtained.

Further, the operating piece drives the transmission mechanism to execute the retracting action and the opening action of the jaw.

Furthermore, the surgical instrument further comprises a reduction gearbox, and the operating part is connected with the input part through the reduction gearbox.

Compared with the prior art, the invention has the beneficial effects that: the position relation of the motor and the operating part is set, the operating part is hidden when the electric module is installed and can only be driven by electric power, the motor is forcedly detached and loosened when the operating part is exposed and can only be driven by manual power, so that only one electric power and one manual power can be transmitted to the transmission mechanism at the same time to drive the anastomat to work, and the execution conflict of the transmission mechanism, even the electric anastomat is damaged and a patient is injured due to the accident that the electric power and the manual power act on the transmission mechanism simultaneously when the anastomat is used, is avoided. The design has a simple structure, and the safety of the electric anastomat is improved.

Drawings

FIG. 1 is a perspective view of a surgical instrument provided in accordance with a first embodiment of the present invention;

FIG. 2 is an elevational view of the surgical instrument illustrated in FIG. 1;

FIG. 3 is an exploded schematic view of the portion of the surgical instrument illustrated in FIG. 1;

FIG. 4 is a perspective view of the surgical instrument illustrated in FIG. 1 with a portion of the housing hidden;

FIG. 5 is an elevational view of the surgical instrument illustrated in FIG. 4;

FIG. 6 is an exploded schematic view of the surgical instrument illustrated in FIG. 5;

FIG. 7 is a perspective view of a portion of the drive mechanism of the surgical instrument illustrated in FIG. 4;

FIGS. 8 and 9 are perspective views of portions of the clutch mechanism of the transmission shown in FIG. 7;

FIGS. 10 and 11 are cross-sectional views of portions of the surgical instrument illustrated in FIG. 1;

FIGS. 12 and 13 are perspective exploded views of a partial cut drive structure of the surgical instrument illustrated in FIG. 1;

FIGS. 14-17 are state change schematic views of a clutch mechanism of the surgical instrument illustrated in FIG. 1;

FIGS. 18-21 are schematic views of a jaw drive mechanism of the surgical instrument illustrated in FIG. 1 illustrating changes in configuration and state;

FIG. 22 is a schematic structural view of a first cam member of the jaw drive mechanism shown in FIG. 18;

FIGS. 23-28 are schematic structural views of a motion override mechanism for a sleeve drive jaw of the surgical instrument illustrated in FIG. 1;

FIG. 29 is a schematic view of a forward and reverse orientation of the operative member of the surgical instrument illustrated in FIG. 1;

FIG. 30 is a schematic projection view in a plane perpendicular to the axis of rotation of the operative member of the surgical instrument illustrated in FIG. 1 as it rotates about the axis of rotation;

FIG. 31 is a schematic illustration of the construction of an auxiliary operating member assembly operator of the surgical instrument in accordance with the second embodiment of the present invention;

FIG. 32 is a perspective view of the auxiliary operating member assembly operating member of FIG. 31 as it rotates about the axis of rotation in a plane perpendicular to the axis of rotation;

FIG. 33 is a schematic illustration of the secondary operating member of the surgical instrument being an L-shaped lever in accordance with the second embodiment of the present invention;

FIG. 34 is a diagrammatic view of a surgical instrument provided in accordance with a third embodiment of the present invention;

FIG. 35 is a diagrammatic view of another surgical instrument provided in accordance with a third embodiment of the present invention;

FIG. 36 is an elevational view, in partial configuration, of a surgical instrument according to a fourth embodiment of the present invention;

FIG. 37 is a perspective view of a portion of the structure of the surgical instrument illustrated in FIG. 36;

FIG. 38 is a schematic illustration of a portion of the structure of a surgical instrument according to a fifth embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be understood that the terms "proximal" and "distal" are used herein with respect to a clinician manipulating a handle assembly of a surgical instrument. The term "proximal" refers to the portion that is closer to the clinician, and the term "distal" refers to the portion that is further from the clinician. I.e., the handle assembly is proximal and the jaw assembly is distal, e.g., the proximal end of a component is shown relatively close to one end of the handle assembly and the distal end is shown relatively close to one end of the jaw assembly. The terms "upper" and "lower" are used with reference to the relative positions of the staple abutting seat and the magazine seat of the jaw assembly, specifically, the staple abutting seat is "upper" and the magazine seat is "lower". However, surgical instruments are used in many orientations and positions, and thus these terms are not intended to be limiting and absolute.

In the present invention, unless otherwise expressly stated or limited, the terms "connected" and "connecting" are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, a movable connection, or an integral part; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations. It should be noted that, when a definite term is used before "connected" or "connected", it has the meaning defined by the corresponding definite term, only excluding the case where it is obviously necessary to exclude other possible cases, such as "detachably connected" means detachably connected, and does not include fixed connection and integration, but movable connection, direct connection, indirect connection through an intermediate medium are not excluded.

Fig. 1 to 30 show asurgical instrument 100, in particular a motorized stapler, according to a first embodiment of the invention. The modules included in thesurgical instrument 100 to power it are defined as power modules, which are classified according to their power type into a power module that provides electrical power and a manual module that provides manual power.

Thesurgical instrument 100 includes abody 108, ashaft assembly 104, and anend effector 106 connected in series. Thebody 108 includes a main module and an electricpowered module 110 connected thereto. The main module includes a first housing 112, the first housing 112 includes ahead housing 114 and ahandle housing 116 connected together, thehead housing 114 houses at least a portion of the transmission mechanism, and thehandle housing 116 is adapted to be held by an operator. Of course, in some embodiments, thehandle housing 116 may also house a portion of the transmission mechanism, as will be described in more detail below. Theelectric module 110 includes asecond housing 120 and amotor 122, thesecond housing 120 housing themotor 122. Themain body 108 also includes a removably mountable battery pack (not shown) including a third housing (not shown) removably mounted to thehandle housing 116 and a battery housed in the third housing. Preferably, thehandle housing 116 has a cavity to which the battery pack is mounted. The battery supplies electric power to themotor 122, and themotor 122 operates while receiving the electric power to output electric power. The transmission mechanism is connected to theelectric module 110 and operates when electric power output from themotor 122 is obtained.

Theshaft assembly 104 includes at least some other gearing mechanism than that housed by thehead housing 114 in this embodiment, and thehead housing 114 and thehandle housing 116 in some embodiments. For example, theshaft assembly 104 includes amandrel 124 and asleeve 126 that is sleeved over themandrel 124. Thespindle 124 andsleeve 126 are part of a transmission mechanism.

End effector 106 includes ajaw assembly 128 and a cartridge assembly. Thejaw assembly 128 includes acartridge receptacle 130 and ananvil 132 pivotally attached to thecartridge receptacle 130. Thecartridge carrier 130 is adapted to operably support a cartridge assembly (not shown) positioned therein, and theanvil 132 is selectively movable between an open position and a closed position to cooperate with thecartridge carrier 130 and the cartridge assembly to clamp or unclamp tissue. The nail bin assembly is provided with a groove for the movement of the cutting knife assembly, the cutting knife assembly can cut tissues in the movement process of moving towards the far end in the groove, and anastomotic nails contained in the nail bin assembly are pushed to be ejected out of the nails so as to anastomose the tissues.

Therefore, themotor 122 drives the cutting knife assembly to advance through the transmission mechanism to cut and anastomose the tissue, then themotor 122 drives the cutting knife assembly to retreat through the transmission mechanism, and finally themotor 122 drives thejaw assembly 128 to open through the transmission mechanism to loosen the tissue, so that the cutting and anastomosing functions of the anastomat are realized.

The transmission mechanism includes a switching mechanism and a driving mechanism that are sequentially driven. The switching mechanism includes an input driven by themotor 122, a clutch mechanism driven by the input, and an output selectively driven by the clutch mechanism. The output member includes a first output member and a second output member. The drive mechanism includes a cuttingdrive mechanism 146 and a jawassembly drive mechanism 148, with a first output driving the cuttingdrive mechanism 146 and a second output driving the jawassembly drive mechanism 148. Thecutting driving mechanism 146 drives the cutting knife assembly to feed or retract; the jawassembly drive mechanism 148 drives thejaw assembly 128 to close or open. The first output piece and the second output piece are alternatively driven, so that the cutting executing mechanism and the jaw assembly driving mechanism are alternatively driven. Depending on the mode of operation of the surgical instrument, the cutting actuator cannot be actuated simultaneously with the actuation of the jaw actuator, and the actuation of the cutting actuator and the actuation of the jaw actuator should follow a predetermined sequence, and therefore, it is useful to selectively actuate the cutting actuator.

The cutting driving mechanism comprises a first driving part and a first driven part, the first driving part comprises a first motion conversion structure, the first driven part comprises a second motion conversion structure, the first driving part and the first driven part realize the conversion of motion modes through the first motion conversion structure and the second motion conversion structure, and the rotation of the first driving part is converted into the linear movement of the first driven part. The output part is connected with the first driving part, and the first driven part is connected with the cutting executing mechanism. The clutch mechanism selectively drives the output part to selectively drive the first driving part, and then the cutting executing mechanism is selectively driven by the first driven part. The mode of operation of the surgical instrument requires that the cutting actuator be moved in a linear motion. The structure simplification of the cutting driving mechanism and the clutch mechanism is realized.

The cutting driving mechanism has a cutting driving direction, and the cutting driving direction is a linear moving direction of the first driven member or a linear moving direction of the cutting executing mechanism. The direction that the central axis of power module'soutput shaft 168 extends is the same with cutting drive direction, from this, sets up power module in the head casing along the direction the same with the direction of first follower rectilinear movement to being independent of the handle setting with power module, being convenient for set up the position and the angle of handle as required, can accord with ergonomics, promotion operator's experience. The directions are the same, including the included angle between the directions is equal to zero or equal to 180 degrees, namely, the directions are the same and opposite. In the prior art, at least part of the power module is arranged in the handle, the extending direction of the central axis of theoutput shaft 168 of the power module is perpendicular to the linear moving direction of the first driven member, and the position of the handle cannot be flexibly arranged under the limitation of the power module.

The first active element includes a proximal end and a distal end. Proximal refers to the end closer to the operator (including the doctor) and distal refers to the end further from the operator. The first follower linearly moves to have a linear movement stroke. The area of the linear moving stroke is far away from the proximal end of the first active part, and the far direction is a direction from the proximal end to the distal end. The linear moving stroke of the first driven part is positioned on the left side of the near end of the first driving part, the linear moving stroke of the first driven part does not occupy the right side space of the near end of the first driving part, and other parts positioned in the right side space are not limited by the first driven part. Thereby making the overall construction of the surgical instrument more compact. The directions "left" and "right" in this paragraph are based on those shown in fig. 10 and 11.

The clutch mechanism includes anintermediate member 152 and a clutch member.Intermediate member 152 engages the input member andintermediate member 152 drives the clutch member. The output part is connected with a first driving part of the cutting driving mechanism, and the clutch part is selectively matched with the output part, so that selective driving of the cutting driving mechanism is realized. The clutch member includes an active range structure and an idle range structure. When the idle rotation structure is coupled with the output piece, the output piece is not driven, and the cutting driving mechanism is not driven, so that the output piece is selectively driven and the cutting driving mechanism is selectively driven. And matching and coupling are carried out together to realize selective matching. Coupling, refers to the termination of mating between components that mate due to a change in relative position or state, the absence of structure for mating. Relative positional changes include, but are not limited to, the following: relative rotation between the parts.

Specifically,intermediate member 152, the clutch member, rotate in unison, thereby enablingintermediate member 152 to drive the clutch member. Preferably, theintermediate member 152 and the clutch member are formed on the same component.

Specifically, the output member is a gear, the effective rotation structure is a toothed portion, and the idle rotation structure is a non-toothed portion. Furthermore, the toothed part and the toothless part are both positioned on the outer peripheral surface of the clutch piece, and the toothed part and the toothless part are arranged in an adjacent mode.

Specifically, the first driving member is alead screw 186, the first driven member is anut 188, the first motion conversion structure is a first thread arranged on thelead screw 186, the second motion conversion structure is a second thread arranged on thenut 188, thelead screw 186 and thenut 188 are matched with the second thread through the first thread to realize the conversion of motion modes, and the rotation of thelead screw 186 is converted into the linear movement of thenut 188. Thenut 188 is elongated. Fig. 10 shows an initial position of the linear movement stroke of thenut 188, and fig. 11 shows an intermediate position of the linear movement stroke of thenut 188, namely, the linear movement stroke between the initial position and the intermediate position, and an area occupied by the initial position and the intermediate position is an area occupied by the linear movement stroke. The linear travel of thenut 188 is in a region away from the proximal end of thelead screw 186 and in a direction along the proximal end of thelead screw 186 toward the distal end of thelead screw 186. The cutting drive mechanism (i.e., the first drive mechanism) includes alead screw 186, anut 188, a first thread provided to thelead screw 186, and a second thread provided to thenut 188. The first motion transfer mechanism includes aspindle 124. The cutting actuator, i.e., the cutter assembly, includes apusher member 350 and acutting blade 352. The proximal end of themandrel 124 is connected to the distal end of thenut 188, the distal end of themandrel 124 is connected to thepusher member 350, and thepusher member 350 is connected to thecutting blade 352, whereby thenut 188 in turn drives themandrel 124, thepusher member 350, and thus thecutting blade 352 forward or backward, i.e., advances or retracts. During the feed, thenut 188 moves linearly from the initial position to the intermediate position, and during the retract, thenut 188 moves linearly from the intermediate position to the initial position.

Specifically, thelead screw 186 is driven to rotate by the output member of the switching mechanism. The output member of the switching mechanism is a cutting drive gear that is connected to alead screw 186. The distal end ofnut 188 includes a receivingslot 194, the proximal end ofspindle 124 has a roundedinsertion portion 196, andinsertion portion 196 is inserted into and received in receivingslot 194. Theinsertion portion 196 is rotatable in theaccommodation groove 194, but the movement in the longitudinal direction thereof is restricted by theaccommodation groove 194, so that thenut 188 can drive thespindle 124 through theaccommodation groove 194 and theinsertion portion 196. Theinsert 196 is rotatable in the receivingslot 194 so that thespindle 124 can rotate about its own axis independently of thenut 188. Themandrel 124 is rotatable to accommodate the rotation of the shaft assembly which causes the end effector to rotate circumferentially to adjust the position for grasping and securing tissue. Thenut 188 includes astop 198. thestop 198 cooperates with astop 200 such that rotation of thenut 188 about its central axis is limited and thenut 188 does not rotate but moves linearly when driven by thelead screw 186. The outer surface of thenut 188 includes a flat surface that is astop 198. The limitingmember 200 is connected to the housing such that the limitingmember 200 cannot rotate, and the limitingmember 200 also includes a flat surface, and the flat surface of the limitingmember 200 abuts against the flat surface of the outer surface of thenut 188, thereby limiting the rotation of thenut 188. Preferably, the outer surface of thenut 188 includes two symmetrically disposed flat surfaces, and the retainingmember 200 also includes two symmetrically disposed flat surfaces.

Preferably, an accelerating mechanism is arranged between the first output member and the first driving member to increase the rotation speed of the first driving member, and the stroke of the first driven member can be increased within the same time length or increased under the condition that the first output member rotates. Increasing the stroke of the first follower may increase the stroke of the cutting actuator to accommodate the need for a larger cutting stroke. Specifically, the acceleration mechanism includes a two-stage acceleration mechanism 202, the two-stage acceleration mechanism 202 has the same structure and is a planetarygear acceleration mechanism 202, and the structure of the planetary gear acceleration mechanism is well known to those skilled in the art and is not described herein. The first output member drives the first driving member to rotate in an accelerated manner after passing through the two-stage planetarygear acceleration mechanism 202, so that the rotating speed of the first driving member is increased.

Preferably, athrust bearing 206 is provided between the first output member and the first driving member to overcome a reaction force applied by the cutting actuator to the first output member via the first motion transfer mechanism, the first driven member, and the first driving member, which reduces the transmission efficiency of the clutch mechanism. The structure of the thrust bearing is common knowledge in the art and will not be described in detail herein.

The transmission mechanism further includes a jaw drive mechanism (i.e., a second drive mechanism) and a jaw actuator. The cutting drive mechanism and the jaw drive mechanism are both selectively driven, thereby realizing the action logic relationship between the cutting execution mechanism and the jaw execution mechanism, and further realizing the action logic relationship between the cuttingknife 352 and the jaw assembly. Depending on the manner in which the surgical instrument is operated, the actions of the jaw assembly and thecutting blade 352 cannot be performed simultaneously, and the actions should follow the following sequence: the jaw assembly is closed, the cuttingknife 352 is advanced, the cuttingknife 352 is retracted, and the jaw assembly is opened. The requirements for the action of the jaw assembly and thecutting blade 352 are also referred to as action logic relationships. The above action logic relationship realizes that: the jaw assembly is closed to squeeze and secure tissue received therein, the cuttingknife 352 is advanced to engage and cut the tissue, the knife is retracted after engagement and cutting is complete, and the jaw assembly is opened to release the tissue after retraction.

The clutch mechanism includes anintermediate member 152, a firstclutch member 154 and a secondclutch member 156. Theintermediate member 152 is engaged with the input member, and theintermediate member 152 drives the firstclutch member 154 and the secondclutch member 156. The output piece comprises a first output piece and a second output piece, the first output piece is connected with a first driving piece of the cutting driving mechanism, and the second output piece is connected with the jaw driving mechanism. Thefirst clutch 154 is selectively engageable with the first output to effect selective actuation of the cutting drive mechanism. Thesecond clutch 156 is selectively engageable with the second output to effect selective actuation of the jaw drive mechanism. Thefirst clutch 154 includes a first effectiverotation range structure 158 and a first idlerotation range structure 160, such that when the first effectiverotation range structure 158 is engaged with the first output member, the first output member is driven and the cutting drive mechanism is driven, and when the first idlerotation range structure 160 is coupled with the first output member, the first output member is not driven and the cutting drive mechanism is not driven, thereby enabling the first output member to be selectively driven and the cutting drive mechanism to be selectively driven. Thesecond clutch 156 includes a second effectiverotation range structure 162 and a second idlerotation range structure 164, such that when the second effectiverotation range structure 162 is engaged with the second output, the second output is driven and the jaw drive mechanism is driven, and when the second idlerotation range structure 164 is coupled with the second output, the second output is not driven and the jaw drive mechanism is not driven, thereby enabling the second output to be selectively driven and the jaw drive mechanism to be selectively driven. And matching and coupling are carried out together to realize selective matching. Coupling, refers to the termination of mating between components that mate due to a change in relative position or state, the absence of structure for mating. Relative positional changes include, but are not limited to, the following: relative rotation between the parts. Specifically, theintermediate member 152, the firstclutch member 154 and the secondclutch member 156 rotate in unison, thereby enabling theintermediate member 152 to drive the firstclutch member 154 and the secondclutch member 156. Specifically, the first and second outputs are both gears, the first and

second range structures

158, 162 are both toothed, and the first and

second range structures

160, 164 are both non-toothed. Preferably, theintermediate member 152, the firstclutch member 154 and the secondclutch member 156 are formed on the same component.

Referring now to fig. 18-22, thejaw drive mechanism 148 for driving movement of thejaw assembly 128 includes a jaw closing drive mechanism that drives the jaw assembly closed and a jaw opening drive mechanism that drives the jaw assembly open. The jaw opening driving mechanism and the jaw closing driving mechanism both comprise a power supply part and a transmission assembly, the power supply part supplies power to the transmission assembly, and the transmission assembly drives the jaw assembly to move under the driving of the power supply part. In the present embodiment, the "jaw" and the "jaw assembly" are the same technical feature.

The jaw opening drive mechanism and the jaw closing drive mechanism are powered differently, the power supply of the jaw closing drive mechanism is ajaw drive gear 172, and thejaw drive gear 172 is driven by themotor 122 to rotate, thereby powering the transmission assembly. The power supply part of the jaw opening driving mechanism is areset part 214, thereset part 214 is an elastic element, the elastic element is stored with energy in the closing process of thejaw assembly 128 driven by the jaw closing driving mechanism, and the elastic element recovers deformation to release energy in the opening process of the jaw assembly so as to supply power to the transmission assembly.

The driving components of the jaw opening driving mechanism and the jaw closing driving mechanism are the same, but the power transmission paths of the driving components in the jaw opening process and the jaw closing process are opposite, and it should be noted that the power providing member of the jaw closing driving mechanism needs to move and drive the second driving member to move to make room in the opening process of the jaw assembly, which will be described in detail later.

The transmission assembly comprises a second driving part and a second driven part driven by the second driving part, the second driving part is provided with a third motion conversion structure, the second driven part is provided with a fourth motion conversion structure, and the third motion conversion structure and the fourth motion conversion structure are matched to convert the rotation of the second driving part into the linear motion of the second driven part. Because the stapler has ashaft member 104 extending lengthwise, linear motion of the second follower may be conveniently transmitted through theshaft member 104 to the proximal end of thejaw member 128.

The second driving member is afirst cam member 224, and the third motion conversion structure includes afirst cam surface 226 provided on the distal end side of the second driving member. The second driven member is driven to move by thefirst cam surface 226, so that the motion output by the transmission assembly is more accurate, and the operation requirement of the anastomat can be better met. The rotation axis of the second driving part is parallel to the central axis of the output shaft of the power module, so that the transmission mechanism is reasonable in overall layout and compact in structure.

As previously described, the jaw closure drive mechanism includes ajaw drive gear 172 that powers the transmission assembly, and thejaw drive gear 172 rotates to drive thefirst cam member 224 in rotation. Specifically, thejaw drive gear 172 and thefirst cam member 224 are fixedly disposed on the same drive shaft, which allows thejaw drive gear 172 and thefirst cam member 224 to be coaxially disposed, facilitating power transmission. Thejaw drive gear 172 and thefirst cam member 224 are spaced axially of the drive shaft to avoid interference with other components of the drive mechanism. It can be seen that thefirst cam member 224 is axially fixed for rotation only with thejaw drive gear 172 and does not move linearly.

Thefirst cam member 224 has a circumferential outer surface, and thefirst cam surface 226 is extended obliquely in the circumferential direction of thefirst cam member 224 at the distal end side of the second driving member as a spiral surface provided at the distal end side of the second driving member. Therefore, thefirst cam member 224 has a regular structure, and the stroke required for closing the jaws of the anastomat can be well realized by virtue of the stroke and the surface shape of thefirst cam surface 226.

Thus, whenfirst cam surface 226 drives the second follower and thus the jaw assembly to close and firststart abutment surface 228 and firstend abutment surface 230 abut the second follower,first cam member 224 cannot drive the jaws to move, thereby maintaining the jaws in an open or closed position and preventing undesired movement of the jaw assembly resulting in an accidental medical condition.

Referring to the firststart abutment surface 228, thefirst cam surface 226, and the firstend abutment surface 230, which are connected in series, as stroke surfaces, the distal side of thefirst cam member 224 is provided with two stroke surfaces, which are arranged centrally symmetrically along the central axis of thefirst cam member 224. The two centrosymmetric stroke surfaces can drive the second driven part more stably, so that the second driven part is stressed more uniformly, the transmission of the jaw closing driving mechanism is more stable, and the jaw closing process is more stable. Preferably, the circumferential extension angle of the two stroke surfaces is equal to 360 degrees, that is, the two stroke surfaces extend in the entire circumferential direction of the distal side of thefirst cam piece 224, the structure is more regular, and the transmission is more stable. As shown in fig. 22, the first startingpoint abutment surface 228, thefirst cam surface 226, and the first endpoint abutment surface 230 located at the upper side of fig. 22 are one stroke surface, and the first end point abutment surface 230' of the other stroke surface is shown at the lower side of fig. 22, and is not shown in fig. 22 due to the view angle.

The second driven part and the second driving part are arranged oppositely. The second follower is asecond cam member 234 and the fourth motion translating structure is asecond cam surface 236, thesecond cam surface 236 being shaped to match thefirst cam surface 226. By form-fitting, it is meant that the first and second cam surfaces 226, 236 may generally conform to one another in some mating condition. Thesecond cam member 234 has a circumferential outer surface and thesecond cam surface 236 extends obliquely in the circumferential direction of thesecond cam member 234 on the proximal side of the second follower as a spiral surface disposed on the proximal side of thesecond cam member 234. Due to the fact that thesecond cam surface 236 is matched with thefirst cam surface 226 in shape, in the jaw closing process, thesecond cam surface 236 is in surface contact with thefirst cam surface 226, movement switching between the second driving piece and the second driven piece is achieved, and transmission is stable. Preferably, thesecond cam surface 236 is not only matched in shape but also identical in size to thefirst cam surface 226, which not only is compact, but also provides a good translation of motion.

Note that a rotation stop mechanism is provided between thesecond cam member 234 and thehousing 102. The detent mechanism may be, for example, a mating lengthwise extending projection and recess, with one of thesecond cam member 234 and thehousing 102 being provided with the projection and the other of thesecond cam member 234 and thehousing 102 being provided with the recess. The cooperation of thesecond cam surface 236 and thefirst cam surface 226 provides thesecond cam member 234 with a tendency to move in both a rotational and a linear motion, and the detent mechanism prevents thesecond cam member 234 from rotating such that thesecond cam member 234 can only move in a linear motion.

Thesecond cam member 234 further includes a secondstart abutment surface 238 and a second end abutment surface adjacent thesecond cam surface 236, the secondstart abutment surface 238 being adjacent and angularly disposed to one end of thesecond cam surface 236 and the second end abutment surface being adjacent and angularly disposed to the other end of thesecond cam surface 236. The angle between the second startpoint abutment surface 238 and thesecond cam surface 236 refers to the angle between the second startpoint abutment surface 238 and the plane of thesecond cam surface 236 closest to the second startpoint abutment surface 238. The angle between the second end abutment surface and thesecond cam surface 236 is defined similarly and will not be described again. The angle between the secondstart abutment surface 238 and thesecond cam surface 236 is an obtuse angle, and the angle between the second end abutment surface and thesecond cam surface 236 is an obtuse angle. The obtuse angle facilitates the engagement of thesecond cam member 234 with thefirst cam member 224 to maintain a certain position, as will be described in detail later. In this embodiment, the second startpoint contact surface 238 is perpendicular to the central axis of thesecond cam piece 234, the second end point contact surface is perpendicular to the central axis of thesecond cam piece 234, and the second startpoint contact surface 238 and the second end point contact surface are spaced apart in the direction in which the central axis of thesecond cam piece 234 extends.

The secondstart abutment surface 238, thesecond cam surface 236, and the second end abutment surface, which are connected in this order, are referred to as stroke surfaces, and the proximal side of thesecond cam member 234 is provided with two stroke surfaces, which are arranged centrosymmetrically along the central axis of thesecond cam member 234. The two centrosymmetric travel surfaces can be matched with the second driving part more stably, so that the second driven part is stressed more uniformly, the transmission of the jaw closing driving mechanism is more stable, and the jaw closing process is more stable. Preferably, the circumferential extension angle of the two stroke surfaces is equal to 360 degrees, that is, the entire circumferential extension of the two stroke surfaces on the proximal side of thesecond cam member 234 is more regular and stable in transmission.

The stroke surfaces of thefirst cam member 224 and thesecond cam member 234 are identical in shape and size, and the matching and transmission of thefirst cam member 224 and thesecond cam member 234 can be well achieved.

Thus, during jaw closure,first cam member 224 andsecond cam member 234 have three mating states:

in the first mating state, the firststart abutment surface 228 abuts the secondstart abutment surface 238, and the distance between thefirst cam member 224 and thesecond cam member 234 reaches a minimum value. In the first mating condition, the mating relationship of thefirst cam member 224 and thesecond cam member 234 further comprises: thesecond cam surface 236 abuts against the first cam surface 226 (not shifted in the circumferential direction), and the first endpoint abutment surface 230 abuts against the second end point abutment surface. Because the firststart abutment surface 228 abuts the secondstart abutment surface 238, thefirst cam piece 224 and thesecond cam piece 234 remain relatively stationary, thefirst cam piece 224 does not drive thesecond cam piece 234, and thesecond cam piece 234 cannot drive the jaw movement, thereby preventing thejaw assembly 128 from being accidentally operated. When the distance betweenfirst cam member 224 andsecond cam member 234 reaches a minimum,jaw assembly 128 is not driven byjaw drive mechanism 148 andjaw assembly 128 is in the open position. The distance between thefirst cam member 224 and thesecond cam member 234 is the axial distance between the first startpoint abutment surface 228 and the second startpoint abutment surface 238, or the axial distance between the first endpoint abutment surface 230 and the second end point abutment surface. Axial refers to the axial direction of either thefirst cam member 224 or thesecond cam member 234.

In the second mating condition, rotation of thefirst cam member 224 causes thefirst cam surface 226 to push against thesecond cam surface 236 to drive thesecond cam member 234 linearly. In the process of switching from the first engagement state to the second engagement state, since the rotation stop mechanism engaged with thesecond cam piece 234 stops the rotation of thesecond cam piece 234, the second startingpoint abutment surface 238, thesecond cam surface 236 and the second end point abutment surface of thesecond cam piece 234 do not rotate in the circumferential direction and do not change in the circumferential position, the second startingpoint abutment surface 238 is disengaged and gradually moves away from the first startingpoint abutment surface 228, thesecond cam surface 236 is gradually staggered from thefirst cam surface 226 in the circumferential direction, the second end point abutment surface is disengaged and gradually moves away from the first endpoint abutment surface 230, the distance between thesecond cam piece 234 and thefirst cam piece 224 gradually increases, and thesecond cam piece 234 gradually moves toward the distal end to gradually drive the jaws open.

In the third mating state, the secondstart abutment surface 238 abuts the firstend abutment surface 230, and the distance between thefirst cam member 224 and thesecond cam member 234 reaches a maximum value. During the transition from the second mating condition to the third mating condition, thesecond cam surface 236 is gradually misaligned with thefirst cam surface 226 until thesecond cam surface 236 is completely disengaged from thefirst cam surface 226, and then the secondstart abutment surface 238 abuts the firstend abutment surface 230, thesecond cam member 234 and thefirst cam member 224 remain relatively stationary, thefirst cam member 224 can no longer drive thesecond cam member 234 distally, the distance between thefirst cam member 224 and thesecond cam member 234 reaches a maximum, the jaws close and remain stationary, thereby preventing thejaw assembly 128 from being accidentally operated.

It should be noted that, as described above, the second driving member and the second driven member both have two stroke surfaces arranged centrosymmetrically, and the two stroke surfaces of the second driven member correspond to the two stroke surfaces of the second driving member one to one and are driven by the two stroke surfaces of the second driving member one to one, where the above description takes one of the stroke surfaces as an example, and the matching state of the other stroke surface is the same, and is not repeated.

The jaw closure drive mechanism further includes a second motion transfer mechanism disposed between the second follower and thejaw assembly 128. Since the second follower of the jaw closure drive mechanism is disposed in thehousing 102 at the proximal end of theshaft assembly 104 and thejaw assembly 128 driven by the jaw closure drive mechanism is disposed at the distal end of theshaft assembly 104, by providing the second motion transfer mechanism, linear motion of the second follower can be smoothly transferred to the proximal end of thejaw assembly 128 to drive thejaw assembly 128.

The second motion transmission mechanism comprises a distance transmission mechanism and a linear transmission mechanism which are connected, and the distance transmission mechanism enables the axes of the linear transmission mechanism and the second driven piece to be parallel. That is to say, the second follower drives the interval transfer mechanism, and the interval transfer mechanism drives the linear transfer mechanism, and the interval transfer mechanism makes the linear transfer mechanism and the axis of second follower parallel for whole drive mechanism's overall arrangement is more reasonable structure compacter.

The pitch transmission mechanism is alink 248, one end of thelink 248 is connected to the second follower, and the other end of thelink 248 is connected to the linear transmission mechanism. Thus, the linear transmission mechanism and the second follower can be moved in parallel by the transmission of thelink 248, and the linear transmission mechanism and the second follower can be constructed simply and effectively.

The linear transfer mechanism includes acompression ring 250 and asleeve 126 coupled thereto. Thus, the other end of thelink 248 is pivotally connected to thecompression ring 250 and thesleeve 126 is connected to thecompression ring 250. Thereby, the connectingrod 248 transmits the linear motion of the second follower to thepress ring 250 and thebushing 126, so that thepress ring 250 and thebushing 126 linearly move in synchronization with the second follower.

Referring now to fig. 23-28, a motion conversion mechanism is provided between thesleeve 126 and theanvil 132 of thejaw assembly 128, which converts linear motion of thesleeve 126 into pivotal motion of theanvil 132, thereby allowing theanvil 132 to pivot relative to thecartridge housing 130 to close or open thejaw assembly 128. Specifically, as thesleeve 126 moves proximally, the motion conversion mechanism drives theanvil 132 to pivot upwardly to open thejaw assembly 128, and as thesleeve 126 moves distally, the motion conversion mechanism drives theanvil 132 to pivot downwardly to close thejaw assembly 128.

In particular, thesleeve 126 includes abody 254 and adrive tube 256 coupled thereto, thedrive tube 256 driving theanvil 132 to pivot upwardly or downwardly to open or close thejaw assembly 128. Thebody 254 and thedrive tube 256 are connected by a hinge, or may be integrally formed.

The motion changing mechanism includes afirst driving portion 258 and asecond driving portion 260 provided to the drivingtube 256, and a first drivenportion 262 and a second drivenportion 264 provided to thenail abutting seat 132.

Thefirst driving portion 258 drives theanvil 132 to open, and thefirst driving portion 258 is a protrusion provided on the drivingtube 256, and the protrusion extends obliquely in the lower right direction. Thesecond driver 260 drives theanvil 132 closed, thesecond driver 260 being the driving surface of the distal end of thedrive tube 256.

Accordingly, thefirst follower portion 262 can be coupled with thefirst driving portion 258, and thefirst follower portion 262 is a protrusion disposed on thenail seat 132, and the protrusion extends upward. The second drivenportion 264 can be coupled to thesecond driving portion 260, and the second drivenportion 264 is an abutting surface abutting against the proximal end of thenail seat 132.

A guide mechanism is further arranged between thenail abutting seat 132 and thenail bin seat 130, the guide mechanism comprises apin 266 arranged on thenail abutting seat 132 and a kidney-shapedgroove 268 arranged on thenail bin seat 130, and the kidney-shapedgroove 268 obliquely extends upwards along the direction from the proximal end to the distal end.

Referring to the change of state of fig. 28-27, when it is desired to close theend effector 106, thebody 254 of thesleeve 126 pushes thedrive tube 256 distally, thesecond drive portion 260 on thedrive tube 256 abuts thesecond follower portion 264 on theanvil 132, thepin 266 moves from the proximal end to the distal end of theslot 268, theanvil 132 pivots downwardly, and thejaw assembly 128 closes.

Referring to the change of state of fig. 27-28, when thejaw assembly 128 is to be opened, thebody 254 of thesleeve 126 pulls the drivingtube 256 proximally, thefirst driving portion 258 of the drivingtube 256 abuts the first drivenportion 262 of theanvil 132, thepin 266 moves from the distal upper end to the proximal lower end of theslot 268, theanvil 132 pivots upward, and thejaw assembly 128 opens.

As previously described, the jaw opening mechanism includes a power supply and a transmission assembly. The power supply part is areset part 214, in particular an elastic element, and the elastic element is used for storing energy in the movement process of the jaw closing mechanism; the transmission components of the jaw opening driving mechanism and the jaw closing driving mechanism are the same, but the transmission paths of the transmission components of the jaw opening process and the jaw closing process are opposite.

It should be noted that, the power supply unit of the jaw opening mechanism is thereset unit 214, and thejaw driving gear 172 cannot directly drive the second driven unit, however, thejaw driving gear 172 needs to drive the second driving unit to rotate, the second driving unit rotates to give way to the movement of the second driven unit, and thereset unit 214 drives the second driven unit to move along with the second driving unit. The reset member drives the second follower in a proximal direction, which in turn drives thesleeve 126 in a proximal direction, which in turn drives thejaw assembly 128 open via the motion override mechanism described above, as thesleeve 126 moves proximally.

Thereset piece 214 indirectly drives the second driven piece, apress ring 250 and a connectingrod 248 are connected between thereset piece 214 and the second driven piece, and the connectingrod 248 enables the movement axes of thepress ring 250 and the second driven piece to be parallel, so that the layout of the transmission mechanism is reasonable. Specifically, one end of thereset member 214 abuts against the distal end surface of thepressing ring 250, and the other end abuts against a corresponding position inside thehousing 102.

During jaw opening, thesecond cam member 234 and thefirst cam member 224 have three mating states:

in the first mating state, the secondstart abutment surface 238 abuts the firstend abutment surface 230, and the distance between thesecond cam member 234 and thefirst cam member 224 reaches a maximum value. In the first mated state, the jaws are maintained in a closed state.

In the second engagement state, thefirst cam surface 226 leaves the space for movement of thesecond cam surface 236, and thesecond cam surface 236 follows the movement of thefirst cam surface 226 under the urging of thereset member 214. During the process of switching from the first mating state to the second mating state, thefirst cam piece 224 is driven by thejaw driving gear 172 to rotate and leave the movement space of thesecond cam piece 234, the second startingpoint abutment surface 238 is separated and gradually moves away from the first endingpoint abutment surface 230 and approaches the first startingpoint abutment surface 228, thesecond cam surface 236 and thefirst cam surface 226 are gradually attached, the elastic element pushes thesecond cam piece 234 to move along with thefirst cam piece 224, the distance between thesecond cam piece 234 and thefirst cam piece 224 is gradually reduced, and thesecond cam piece 234 is gradually moved towards the proximal end, so that the jaws are gradually opened through thesleeve 126 and the movement change mechanism.

In the third mating state, the second startpoint abutment surface 238 abuts the first startpoint abutment surface 228, and the distance between thesecond cam member 234 and thefirst cam member 224 reaches a minimum value. During the transition from the second mating state to the third mating state, thesecond cam surface 236 and thefirst cam surface 226 move from partial abutment to full abutment. In the third mating state, the second startpoint abutment surface 238 abuts the first startpoint abutment surface 228, the second end point abutment surface abuts the first endpoint abutment surface 230, the distance between thesecond cam member 234 and thefirst cam member 224 reaches a minimum, and the jaws open to a limit position.

It can be seen that during closing of thejaw assembly 128, thejaw drive gear 172 drives the second driving member, which in turn drives the second driven member, thelink 248, thecompression ring 250, thesleeve 126, and the motion switching mechanism to close thejaw assembly 128. During opening of thejaw assembly 128, thejaw drive gear 172 drives the second driving member to rotate in a reverse direction, the elastic element drives thepress ring 250, the connectingrod 248 and the second driven member to move proximally in sequence, and thepress ring 250 moves proximally to drive thesleeve 126 to move proximally and drive the jaws to open through the movement switching mechanism.

The operation of the surgical instrument driven by themotor 122 in this embodiment is described below (the operation is the same as that of themotor 122 except that thehandwheel 298 is used instead of themotor 122, and thus the description is omitted).

Prior to use of the surgical instrument, thejaw assembly 128 is in an open state and the cutting knife assembly is in an initial position.

If the clinician determines thatjaw assembly 128 is aligned with tissue to be cut and stapled, the clinician activatesmotor 122, the output shaft ofmotor 122 rotates in a first direction and drives main drive gear 166 (the input member) to rotate,main drive gear 166 rotates to drive the intermediate member to rotate, the intermediate member rotates to drive the toothed portion of secondclutch member 156 to begin meshing withjaw drive gear 172 and drivejaw drive gear 172 to rotate,motor 122 continues to operate, andjaw drive gear 172 continues to rotate to drivejaw assembly 128 to close and clamp and squeeze tissue via the aforementioned jaw closure drive mechanism. In this process, the resilient element of the jaw opening drive mechanism is compressed to store energy, and at the same time, the toothless portion of the firstclutch member 154 is coupled to the cuttingdrive gear 170, and the cuttingdrive mechanism 146 cannot drive the cutting blade assembly to move, thereby preventing malfunction.

When the jaws are fully closed, thefirst clutch 154 is rotated until its toothed portions begin to engage the cuttingdrive gear 170. The output shaft ofmotor 122 continues to rotate in the first direction, and cuttingdrive gear 170 drives the cutting knife assembly forward via the aforementionedcutting drive mechanism 146 to cut the tissue, and the cutting knife assembly pushes the staples out of the cartridge assembly to staple the tissue. At the same time, thesecond clutch 156 rotates until its toothless portion begins to couple with thejaw drive gear 172, and thesecond clutch 156 cannot drive thejaw drive gear 172, such that thejaw drive gear 172 cannot drive the jaw movement, thereby avoiding a malfunction.

When the cutter assembly is moved to the distal-most position, the output shaft of themotor 122 is rotated in the second direction, the firstclutch member 154 is rotated in the reverse direction, the toothed portion thereof drives thecutter driving gear 170 to rotate in the reverse direction, and thecutter driving gear 170 drives the cutter assembly to retract through the aforementionedcutter driving mechanism 146.

When the tool withdrawal is completed, the firstclutch member 154 rotates to the toothless portion to start to couple with thecutting driving gear 170, the firstclutch member 154 cannot drive the cutting tool assembly to move through thecutting driving gear 170, meanwhile, the secondclutch member 156 rotates to the toothed portion to start to mesh with thejaw driving gear 172, the secondclutch member 156 drives thejaw driving gear 172 to rotate, thejaw driving gear 172 drives thefirst cam member 224 to rotate, the firstterminal abutment surface 230 is staggered with the secondterminal abutment surface 238, thesecond cam member 234 moves towards the proximal end under the pushing of the elastic element and along the guiding of thefirst cam member 224, thesecond cam member 234 moves towards the proximal end to pull thesleeve 126 to move towards the proximal end through the connectingrod 248 and thepressing ring 250, and thesleeve 126 moves towards the proximal end to drive thejaw assembly 128 to open through the movement changing mechanism to release tissues.

Thus, the surgical instrument performs a complete operation in which the surgical instrument sequentially effects closure of thejaw assembly 128 to grasp tissue, advancement of the cutting knife assembly to cut and staple tissue, retraction of the cutting knife assembly, and opening of thejaw assembly 128 to release tissue.

Referring to fig. 3, thepower module 110 is detachably mounted to the main module. Theelectric module 110 has an attached state and a detached state. In the installed state, thepower module 110 is mounted to the main module, and the first housing 112 and thesecond housing 120 mate with each other to form thehousing 102. The mechanical structure of the coupling is, for example, a buckle, which prevents themotor 122 from separating from the motor when operating, and there are various ways to realize the separation prevention by the mechanical structure coupling, which are not listed here. In the disassembled state, thesecond housing 120 is detached from the first housing 112. The first housing 112 houses at least a portion of a transmission mechanism, such as the switching mechanism 134 and thejaw drive mechanism 148 described above.

The main module further includes an operatingmember 282, the operatingmember 282 is connected to the transmission mechanism, and the operatingmember 282 is configured to obtain a manual force input by a user and transmit the manual force to the transmission mechanism so as to drive the transmission mechanism to operate. Theoperator 282 is part of the manual module described above that provides manual force. In the mounted state, theoperation member 282 is located in thehousing 102 formed by mating the first housing 112 and thesecond housing 120, and in the dismounted state of theelectric module 110, at least a part of theoperation member 282 is exposed. In the present invention, the exposed means exposed so as to be manipulated or connected. During normal use of thesurgical instrument 100 by the surgeon, thepower module 110 is mounted to the main module and the surgeon operates the motor-actuating button at thehandle 342 to cause themotor 122 to operate to drive the gear train to effect opening of the jaw assembly, closing of the jaw assembly, advancing of thecutting blade 352 and/or retracting of thecutting blade 352, while theoperator 282 is positioned within thehousing 102 such that theoperator 282 is not visible and accessible to the surgeon. When the stapler has a power failure such as a battery pack failure or a motor failure, the surgeon may detach thepower module 110 from the main module, remove the connection between themotor 122 and the transmission mechanism, expose the operatingmember 282, and view and operate the operatingmember 282 directly or indirectly to drive the transmission mechanism by manual force. Manual force to operate theoperator 282, manually operating theoperator 282, includes applying a force by an operator's hand directly or indirectly to theoperator 282 to operate the operator, and also includes applying a force by the operator using a hand-held device directly or indirectly to theoperator 282 to operate the operator. Thus, although the transmission mechanism can be driven by both the electromotive force of themotor 122 and the manual force of theoperation member 282, the positional relationship between themotor 122 and theoperation member 282 is set in the present invention — theoperation member 282 is hidden and can be driven only by the electromotive force in the mounted state of theelectric module 110; when theelectric module 110 is disassembled, theoperation part 282 is exposed, themotor 122 is forcibly disassembled and loosened, and only manual force can be used for driving, so that only one of electric power and manual force can be transmitted to the transmission mechanism at the same time to drive the anastomat to work, and the execution conflict of the transmission mechanism, even thesurgical instrument 100 is damaged and the patient is injured, caused by the simultaneous application of two kinds of power to the transmission mechanism is avoided. Such a design, with a simple structure, enhances the safety of thesurgical instrument 100. Moreover, the manual force only needs to drive the transmission mechanism, and theelectric module 110 does not need to be driven, so that the driving resistance is reduced, and the operation experience is improved. It should be understood by those skilled in the art that the number of the above-mentioned operating members that can be hidden may be one or more, for example, one operating member described below that implements dual functions in the present embodiment is not described in detail, for example, two operating members, one driving jaw assembly and the other driving cutter assembly, and the number of the operating members does not affect the implementation of the above-mentioned solution, and the same effect can be obtained, and falls within the scope of the present application.

The transmission mechanism comprises a switching mechanism 134, acutting driving mechanism 146 and ajaw driving mechanism 148, the switching mechanism comprises an input piece, when the switching mechanism 134 obtains power of one of electric power and manual power from the input piece, the switching mechanism 134 selectively drives thecutting driving mechanism 146 or thejaw driving mechanism 148, when thecutting driving mechanism 146 obtains power, a feed action or a retracting action is executed, and when thejaw driving mechanism 148 obtains power, a jaw closing action or a jaw opening action is executed. Preferably, after the surgeon removes thepower module 110, theoperator 282 is used to manually drive the transmission mechanism to perform the retracting and jaw opening actions, and the purpose of theoperator 282 is to provide a safety protection mechanism in case of emergency, so that the stapler can release the tissue and detach from the patient, thereby preventing the stapler from damaging the patient.

Specifically, as shown in fig. 29, theoperation element 282 includes a manualforce transmission unit 284 and amanual operation unit 286 for inputting manual force operated by the user, the manualforce transmission unit 284 includes a manualforce output terminal 288 connected to the input element, and the manualforce transmission unit 284 is connected to themanual operation unit 286. The doctor touches and operates themanual operation unit 286, inputs power to theoperation unit 282, and the power is transmitted from themanual operation unit 286 to the manualpower transmission unit 284 and is output from the manualpower output unit 288.

Further, the electricpower output member 306 is detachably connected to the operatingmember 282, i.e., the electric power output member is connected to the input member via the operatingmember 282. Specifically, the manual force transmitting portion includes arelay input 300, and the electricpower output member 306 is detachably connected to therelay input 300, so that electric power is transmitted to the input member through the manual force transmitting portion of the operatingmember 282, and thus the relay structure is simple.

In the present embodiment, theoperation element 282 is preferably as shown in fig. 29, the manualforce transmission unit 284 is a rotary shaft 284 'for transmitting the manual force in a rotary manner, one end of the rotary shaft 284' is a manualforce output end 288 for outputting the manual force, and the manualforce output end 288 is connected to the input element of the transmission mechanism; themanual operation part 286 is a hand wheel 286 ', the rotation shaft 284 ' passes through the rotation center of the hand wheel 286 ', and the rotation shaft 284 ' and the hand wheel 286 ' are integrated, or in other embodiments, are connected separately, and the doctor rotates the rotation shaft 284 ' by contacting and rotating the hand wheel 286 ', so as to output the power of rotation. In this embodiment, the rotating shaft 284' is integral with the shaft of the input member, but may be a split connection in other embodiments.

Further, the rotational axis of the rotating shaft 284 'coincides with the rotational axis of the handwheel 286', and a first end of the rotating shaft 284 'protrudes from the bottom surface of thewheel 286 to serve as the manualforce output end 288, and a second end of the rotating shaft protrudes from the other bottom surface of the handwheel 286' to serve as thetransmission input end 300. As shown in fig. 29, thetransmission input end 300 is provided with a concave polygonal mounting opening, and the electric power output part of the electric module is a polygonal shaft which extends into the polygonal mounting opening to be mounted in a matching manner, so that power transmission is realized. With theelectric power module 110 in the installed condition, theelectric power output 306 of theelectric power module 110 is connected to thetransmission input 300, and electric power is transmitted through theoperator 282 to themanual power output 288 and then to the transmission input connected to themanual power output 288. In this manner, theelectric motor module 110 is connected to the input member through theoperation member 282 to provide the electric power input. Preferably, the input, therotation axis 284 and theelectric power output 306 of theelectromotive module 110 are coaxial when the electromotive module is in the mounted state, and the coaxial axis can save space and simplify the structure compared to a case where the three are not coaxial.

In other embodiments, the operatingmember 282 is an L-shaped lever, which includes a first lever, i.e., the rotating shaft 284', i.e., the manualforce transmission portion 284, and a second lever, i.e., themanual operation portion 286, connected to the first lever at an angle, preferably a right angle. The first end of the first lever is a manualforce input end 288 connected with the input member, and when the doctor operates the second lever to rotate with the first lever as a rotation axis, the doctor drives the first lever to rotate, thereby transmitting the rotating power to the input member. Further, the second end of the first rod is the junction with the first rod, and the second segment is provided with atransmission input end 300, and the structure and the function of realizing are the same as the foregoing, and are not repeated. Those skilled in the art will appreciate that the operatingmember 282 is not limited to the two embodiments described above, and that such embodiments are not intended to be exhaustive and are within the scope of the present invention.

In the above-describedoperation element 282, the manualforce transmission unit 284 has a rotation axis, and when theoperation element 282 is rotated about the rotation axis, the manualforce output terminal 288 outputs the manual force, and the projection of themanual operation unit 286 on the plane perpendicular to the rotation axis is larger than the projection of the manualforce transmission unit 284 on the plane, and as shown in fig. 30, the projection plane a of the manualforce transmission unit 284 is smaller than the projection plane a + B of the manual operation unit. The maximum radius of themanual operation part 286 from the rotation axis is larger than the outer diameter of the manualforce transmission part 284, so that the rotation radius of operating themanual operation part 286 is larger, the moment is also larger, and it is more convenient and labor-saving than when the doctor directly operates the manualforce transmission part 284.

As shown in fig. 3, the first housing 112 has a peripheral housing parallel to theshaft member 104 and a first mountingsurface 294 generally perpendicular to theshaft member 104, the first mountingsurface 294 may or may not be an actual housing, the first mounting surface housing 286', and only illustrates the functional surface of the mounting. Themanual operating portion 286 protrudes from the first mountingsurface 294, i.e., protrudes from the first housing 112. In this way, themanual operation portion 286 of theoperation member 282 is completely exposed from the first housing 112, and the doctor can easily operate themanual operation portion 286, which is simple in structure. It is easy for those skilled in the art to understand that themanual operating portion 286 is partially located in the first housing 112, and the rest of themanual operating portion 286 protrudes from the first housing 112, as long as the operability of themanual operating portion 286 is not affected.

Accordingly, thesecond housing 120 of theelectric module 110 includes asecond mounting surface 296, and the second mountingsurface 296 may be an actual housing or may not be an actual housing, and only illustrates a functional surface to be mounted. At the second mounting surface of thesecond housing 120, there is a receiving cavity, when theelectric module 110 is mounted to themain body 108, the first housing 112 is mounted to thesecond housing 120, and themanual operating part 286 protruding from the first housing 112 can be received in the receiving cavity, and at this time, the operatingmember 282 is completely located in thehousing 102 and cannot be seen by the user.

In this embodiment, referring to fig. 5, the main module further includes afirst reduction gearbox 308, a first end of thefirst reduction gearbox 308 is connected to the manual power output end, and a second end of thefirst reduction gearbox 308 is connected to the input member. The reduction gear box can reduce the input torque of the manual force input of theoperation member 282, and the user can rotate theoperation member 282 with a small force, improving the ease of operation.

Theelectric motor module 110 also includes a second reduction gearbox between theelectric power output 306 and theelectric motor 122 for reducing the rotational speed of theelectric motor 122 and increasing the output torque.

The invention provides a surgical instrument, wherein an operating part is connected to a transmission mechanism, the operating part is used for obtaining manual force input by user operation and transmitting the manual force to the transmission mechanism, and the transmission mechanism alternatively drives a jaw assembly or a cutting knife assembly to move. In this manner, unlike conventional staplers which have two separate user-operated operating members, one for manually actuating the transmission mechanism to drive the movement of the cutting blade assembly, e.g. to retract the knife, and the other for manually actuating the transmission mechanism to drive the movement of the jaw assembly, e.g. to release the jaws, it is inconvenient for the surgeon to sequentially operate the two operating members during the surgical procedure. Therefore, the dual-function of driving the jaw assembly and the cutting knife assembly to move is realized by utilizing one operating piece, the smoothness of the operation of a doctor is ensured, and the operation is simple and user-friendly. It will be understood by those skilled in the art that an operating member is not limited to the above-mentioned housing, and that the above-mentioned effect can be achieved when the operating member is located outside the housing and can be operated by a user, and the invention is within the scope of the present application.

Note that the manual power or the electric power indicates the type of the power, and the magnitude of the power is not limited to be equal.

In other embodiments, when theoperation member 282 is exposed when thepower module 110 is in the detached state, the surgeon can also install a separate additional backup power module to theoperation member 282 to provide a second path of electric power to theoperation member 282, thereby achieving the same operation of the drive transmission mechanism. Thepower module 110 provides a first power to thedrive mechanism 110 of the surgical instrument, and the operator, whether manually operated or coupled with an additional backup power module, provides a second power to the drive mechanism, the second power being either manual or electrical (second power) and being selectable by the surgeon to manually operate the operator or to install the additional backup power module to the operator. According to the embodiment, the standby power of doctors is diversified, the manual power operation is direct and simple, and the standby power module is labor-saving and convenient to operate.

Second embodiment

The present invention also provides a second embodiment which differs from the first embodiment in that thesurgical instrument 100 further comprises anauxiliary operating member 310, see fig. 31. Theauxiliary operating element 310 includes an auxiliarymanual operation portion 314 to which a user inputs manual force, and when in use, theauxiliary operating element 310 is connected to theoperating element 282 and transmits the input manual force to the manualforce output terminal 288.

In this embodiment, theauxiliary operating member 310 is preferably anauxiliary handwheel 312 as shown in fig. 31, theauxiliary handwheel 312 is a disk having a circular through hole in the middle, the handwheel 286 ' is mounted in the circular through hole, the disk is an auxiliary manual operating portion 314 (not labeled), the doctor operates the outer ring of the disk to rotate the disk around the rotation axis of the operatingmember 282 to drive the operatingmember 282 to rotate, and theauxiliary handwheel 312 has a larger diameter than the rotation axis 284 ' and the handwheel 286 '.

In other embodiments, thesecondary operating member 310 may be an L-shapedlever 400 as shown in FIG. 33, the L-shaped lever including afirst lever 400a and asecond lever 400b connected to thefirst lever 400a at an angle, preferably a right angle. Thefirst rod 400a is mounted on the rotating shaft 284 ', and particularly thetransmission input end 300, that is, the first end of thefirst rod 400a is a polygonal shaft having the same structure as the electric output member, and the polygonal shaft can be inserted into the polygonal mounting opening of thetransmission input end 300 of therotating wheel 286 to be mounted in a matching manner, so that the L-shapedrod 400 is mounted on the handwheel 286 ', the second end of thefirst rod 400a is connected with thesecond rod 400b, thesecond rod 400b is the auxiliarymanual operation part 314, the doctor operates thesecond rod 400b to rotate the L-shapedrod 400 around the rotation axis of the handwheel 286 ', so as to drive the handwheel 286 ' to rotate, and the manual force is input, and the length of thesecond rod 400b is greater than the radius of the handwheel 286 '. It will be appreciated by those skilled in the art that thesecondary handle member 310 may have other forms to achieve an enlarged radius of rotation, all of which are within the scope of the present application and are not listed here.

Third embodiment

The present invention also provides a third embodiment which differs from the second embodiment in that theoperation member 282 is not provided with themanual operation portion 286, theoperation member 282 includes only the manualforce transmission portion 284, and theauxiliary operation member 310 is connected to the manual force transmission portion 284 (i.e., the rotary shaft 284' in this embodiment), for example, to thetransmission input terminal 300.

Specifically, as shown in fig. 34, the rotating shaft 284 ' is disposed to protrude from the first housing 112, and the operatingmember 282 may be accommodated in the accommodating cavity of thesecond housing 120 when theelectric module 110 is in the mounting state, or, as shown in fig. 35, the rotating shaft 284 ' does not protrude from the first housing 11, and the second end of the rotating shaft 284 ' does not protrude from the peripheral housing in the axial direction. Anauxiliary operating member 310 such as a hand wheel or an L-bar having a large radius of rotation axis can be attached to the transmission input end of the rotation axis, thereby enlarging the radius of rotation of the operation and saving labor.

In fig. 34 to 35, the manual force is directly obtained by the operator without providing a manual operation portion, and therefore, the structure is simple, and the manual force is completely inputted by theauxiliary operator 310.

Referring to fig. 36 to 37, a fourth embodiment of the present invention is provided, which is a surgical instrument similar to the first embodiment.

In this embodiment, thesurgical instrument 100 includes ajaw assembly 128, ashaft assembly 104 disposed at a proximal end of thejaw assembly 128, a cutter assembly coupled to a distal end of theshaft assembly 104, a transmission mechanism, a power module, and a power module. A drive mechanism for driving movement of theshaft assembly 104 to advance or retract the cutter assembly and/or for driving opening or closing of thejaw assembly 128; the power module includes a battery pack that provides power to the power module, and in particular, to the power module'selectric module 110. The power module provides power for the driving mechanism. The power module may be apower module 110, thepower module 110 including amotor 122, and thepower module 110 may be removably mounted to the main module of thesurgical instrument 100 or fixedly mounted to the main module. The power module can also be an operatingmember 282, and the operatingmember 282 can replace theelectric module 110 and provide power for the transmission mechanism under the action of external force. The power module may also be a combination of theoperation element 282 and theelectric module 110, and the specific structures, positions, connection relationships, and the like of theelectric module 110 and theoperation element 282 have been described in detail in the first to third embodiments, and are not described herein again. Thesurgical instrument 100 also includes abody 108 disposed at a proximal end of theshaft assembly 104, thebody 108 including ahead housing 114 and ahandle 342 extending downwardly from thehead housing 114, at least a portion of the drive mechanism being housed in thehead housing 114, thehandle 342 including ahandle housing 116.

In this embodiment, the shaft assembly axis a is parallel to or coaxial with the power module output shaft axis b, and coaxial means that the two axes are on the same line, i.e., the two axes coincide. Set up shaft body subassembly axis a into parallel or coaxial with power module output shaft axis b, overall structure is compact on the one hand, and on the other hand, the position and the angle of handle do not receive power module's restriction for the position and the angle setting ofhandle 342 have great design space, can set up the position and the angle ofhandle 342 in a flexible way, and then the doctor of being convenient for holds handle 342, with the bettersurgical instruments 100 of operating, improve the product experience and feel.

In another embodiment, the transmission mechanism includes asecond drive mechanism 148, thesecond drive mechanism 148 having one end connected to theshaft assembly 104 and another end connected to anoutput shaft 168 of a power module that provides power to thesecond drive mechanism 148, thesecond drive mechanism 148 driving thejaw assembly 128 to open or close. Theshaft assembly 104 includes asleeve 126, and thesleeve 126 is connected to the jaw assembly in the manner previously described. Thesecond drive mechanism 148 drives thesleeve 126 to move, thereby causing thejaw assembly 128 to open or close. The shaft assembly axis a is the axis of thesleeve 126 and the power module output shaft axis b is parallel or coaxial with thesleeve 126 axis. In one embodiment, thesecond driving mechanism 148 includes a second driving member, a second driven member driven by the second driving member, and a second motion transfer mechanism. A second motion transfer mechanism is connected to thejaw assembly 128 at one end and to a second follower at the other end. The second driving part is provided with a third motion conversion structure, the second driven part is provided with a fourth motion conversion structure, the third motion conversion structure and the fourth motion conversion structure are matched to convert the rotation of the second driving part into the linear motion of the second driven part, and the second driven part moves to drive thesleeve 126 of the second motion transmission mechanism to move. The second motion transfer mechanism has a first axis and a second axis; the first axis intersects or is non-coplanar with the shaft assembly axis, the second axis is coaxial with the shaft axis, and the first axis and the second axis jointly form the axis of the second motion transmission mechanism. Thesecond drive mechanism 148 has a second drive axis d that is parallel to and then co-axial with the shaft assembly axis a along the cutter assembly advancing direction. The second driving axis d is an axis formed by sequentially connecting the axis of the second driving member, the axis of the second driven member, and the axis of the second motion transmission mechanism. Due to the design, the whole structure is more compact, and the space is saved. The second driving part is afirst cam part 224, the second driven part is asecond cam part 234, the third motion conversion structure is afirst cam surface 226, the fourth motion conversion structure is asecond cam surface 236, the second motion conversion transmission mechanism includes a connectingrod 248 and apressing ring 250, thefirst cam surface 226 and thesecond cam surface 236 are matched to convert the rotation of thefirst cam part 224 into the linear motion of thesecond cam part 234, one end of the connectingrod 248 is pivotally connected with thesecond cam part 234, the other end of the connectingrod 248 is pivotally connected with thepressing ring 250, thesecond cam part 234 moves to drive the connectingrod 248 and thepressing ring 250 to move, and further, thesleeve 126 is driven to move to open thejaw assembly 128, at this time, the first axis is the axis of the connectingrod 248, and the second axis is the axis of thepressing ring 250. The specific structure of thesecond driving mechanism 148 and the specific implementation manner of thesleeve 126 moving to open or close thejaw assembly 128 are the same as the first embodiment, and are not described herein again. In another embodiment, the second drive mechanism comprises a lead screw nut mechanism. In yet another embodiment, the second drive mechanism comprises a rack and pinion mechanism and further comprises a bevel gear assembly or gear, one end of the bevel gear assembly or gear being connected to the power module output shaft and the other end being engaged with the gear.

active range structures

158, 162 are both toothed portions, and the first and second

idle range structures

160, 164 are both non-toothed portions, with the toothed and non-toothed portions being disposed adjacent to one another. Compared with the first embodiment, the intermediate part is reduced, the input part and the clutch part are integrally formed, the power output by the power module is transmitted to the clutch part through the input part, the primary transmission is reduced, and the transmission efficiency is further improved; and the structure is more compact. Of course, it will be appreciated that theintermediate member 152 may not be reduced, and that the power module and the input member connected to the power module output shaft may be positioned such that the power module output shaft axis b is parallel to the shaft assembly axis a, in addition to the first embodiment.

To further enhance the use experience ofsurgical instrument 100, the position ofhandle 342 is configured to correspond to a person

Ergonomically to facilitate the surgeon's better handling and operation of thesurgical instrument 100. in this embodiment, referring to fig. 2, thehandle 342 extends down thehead housing 114, has a handle axis m along its direction of extension, and thehead housing 114 has a head housing axis n along a lengthwise direction, wherein the lengthwise direction is the direction from the proximal end of thesurgical instrument 100 toward its distal end, or from its distal end toward its proximal end, and is parallel to the axis of theshaft assembly 104. The head housing axis n is parallel or coaxial with the shaft axis a. Themotor 122 is disposed in thehousing 102, and the handle axis m and the head housing axis n form a preset included angle θ, which is in a range of 60 degrees to 80 degrees, and preferably, the preset included angle θ is 70 degrees or 75 degrees.

In this embodiment, the shaft assembly axis a and the power module output shaft axis b are parallel or coaxial, which is also beneficial for separating theelectric module 110 from the main module of thesurgical instrument 100, and theelectric module 110 and the main module are separable for replacing themotor 122, and after separating theelectric module 110 from the main module of thesurgical instrument 100, theoperation member 282 can provide power for the driving mechanism under the action of external force, so as to realize the retracting action of the cutter assembly and the opening and closing action of thejaw assembly 128, thereby improving safety and avoiding injury to human body when thesurgical instrument 100 fails. Specifically, the operatingmember 282 may provide power to the driving mechanism under an external force when thepower module 110 is separated from the main module. The detailed structure of theoperation element 282 has been described in detail in the first to fifth embodiments, and is not repeated herein. The connection structure between thepower module 110 and the main module and theoperation member 282 of thesurgical instrument 100, and how theoperation member 282 is operated by external force to open the knife andjaw assembly 128 are also described in detail in the first to third embodiments, and will not be described again here.

Referring to fig. 38, a fifth embodiment of the present invention is shown, which is similar to the first embodiment, and relates to a surgical instrument, specifically asurgical instrument 100.

This implementation differs from the fourth or first embodiment in that the shaft assembly axis a is at a predetermined angle other than 90 degrees to the power module output shaft axis b. Set up shaft body subassembly axis a into being the preset contained angle of non-90 degrees with power module output shaft axis b, be 90 degrees preset contained angle settings in comparison shaft body subassembly axis a and power module output shaft axis b,shaft body subassembly 104 sets up with power module output shaft axis is perpendicular promptly, overall structure is compacter on the one hand, on the other hand, whenmotor 122 holds in the accommodation space that handlecasing 116 formed, handle 342 sets up withshaft body subassembly 104 slope, be convenient for the doctor to holdhandle 342, with operatesurgical instruments 100 better, improve the product experience and feel.

Also to further enhance the experience of using thesurgical instrument 100, and to provide ergonomics to thehandle 342 for the surgeon to better grip and operate thesurgical instrument 100, the shaft assembly axis a is at a predetermined angle to the power module output shaft axis b in the range of 60 degrees to 80 degrees, preferably 70 degrees or 75 degrees. Themotor 122 is accommodated in an accommodating space formed by thehandle case 116, and the battery pack may be disposed in an accommodating space formed by thehead case 114 or an accommodating space formed by thehandle case 116.

In this embodiment, with continued reference to FIG. 38, thesurgical instrument 100 further includes asteering mechanism 348, thesteering mechanism 348 being coupled at one end to theoutput shaft 168 of the power module and at the other end to the transmission mechanism, the power output by the power module having a first power output direction and the power output by the transmission mechanism having a second power output direction; thesteering mechanism 348 is configured to convert the first power output direction to the second power output direction. The first power output direction is the extension direction of the axis of the output shaft of the power module, and the second power output direction is the extension direction of the axis of the input part of the transmission mechanism. In one embodiment, thesteering mechanism 348 includes a beveled gear assembly, and in another embodiment, thesteering mechanism 348 includes a bevel gear.

In this embodiment, theelectric module 110 may also be detachably mounted to the main module of thesurgical instrument 100, and theelectric module 110 and the main module are detachably mounted to facilitate replacement of themotor 122, and after theelectric module 110 is detached from the main module of thesurgical instrument 100, the operatingmember 282 may provide power for the driving mechanism under the action of external force to open thejaw assembly 128 and retract the knife, so as to prevent thejaw assembly 128 from being opened and being unable to perform the knife retracting action when thesurgical instrument 100 fails, thereby preventing injury to the human body, and thus improving the safety of thesurgical instrument 100. Specifically, the operatingmember 282 may provide power to the driving mechanism under an external force when thepower module 110 is detached from the main module. The connection structure between theelectric module 110 and the main module, the connection structure of theoperation member 282, and the structure of theoperation member 282 have been described in detail in the first to third embodiments, and are not described again here.

It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.

The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.

Claims

1. A surgical instrument includes a main module and a motorized module,

the electric module comprises a motor, and the motor outputs electric power when obtaining electric energy;

the main module comprises at least part of a transmission mechanism, the transmission mechanism is connected to the electric module and works when obtaining the electric power output by the motor;

the method is characterized in that: the main module comprises a first shell and an operating piece, the first shell accommodates at least part of the transmission mechanism, and the operating piece is connected to the transmission mechanism to drive the transmission mechanism to work;

the electric module comprises a second housing accommodating the motor;

the electric module is detachably mounted on the main module, when the electric module is in a mounting state, the first shell and the second shell are matched and connected to form a shell, and the operating piece is positioned in the shell; when the electric module is in a disassembled state, the second shell is separated from the first shell, and at least part of the operating piece is exposed.

2. The surgical instrument according to claim 1, wherein the operator includes a manual force transmission portion connected to the transmission mechanism and a manual operation portion for a user to operate to input a manual force, the manual operation portion being connected to the manual force transmission portion.

3. The surgical instrument of claim 2, wherein the second housing is disengaged from the first housing and the manually operable portion protrudes from the first housing when the power module is in the disassembled state.

4. The surgical instrument of claim 2, further comprising an auxiliary operating member coupled to the manual operating portion.

5. A surgical instrument as recited in claim 2, wherein the manual force transmission portion has a rotational axis about which a projection of the manual operation portion onto a plane perpendicular to the rotational axis is greater than a projection of the manual force transmission portion onto the plane when the handle member is rotated.

6. The surgical instrument of claim 2, wherein the manual force transmitting portion is a rotating shaft and the manual operating portion is a hand wheel.

7. The surgical instrument of claim 2 wherein said operating member is an L-shaped lever.

8. The surgical instrument of claim 1, wherein the operator includes a manual force transmission portion, the manual force transmission portion being connected with the transmission mechanism;

the surgical instrument further includes an auxiliary operation piece connected to the manual-force transmission portion in a detached state of the electric module, the auxiliary operation piece being configured to transmit a manual force of the obtained user operation input to the manual-force transmission portion.

9. The surgical instrument according to claim 8, wherein the manual force transmission portion is a rotary shaft having a rotation axis, the auxiliary operating member includes an auxiliary manual operation portion for inputting a manual force for user operation, the auxiliary operating member rotates the operating member about the rotation axis when the user operates the auxiliary operating member, and a projection of the auxiliary manual operation portion on a plane perpendicular to the rotation axis is larger than a projection of the operating member on the plane.

10. The surgical instrument of claim 2 or 8, wherein the transmission mechanism comprises an input member that is driven to operate when the input member obtains the electrical or manual force;

the electric module comprises an electric power output piece for outputting power, the electric power output piece is connected to the input piece to provide electric power when the electric module is in an installation state, and the electric power output piece is disconnected from the input piece when the electric module is in a disassembly state;

the operating member includes a manual-force transmitting portion connected to the input member to transmit the manual force to the input member.

11. The surgical instrument of claim 10 wherein the electrokinetic output member is detachably connected to the operating member, the electrokinetic output member being connected to the input member by the operating member.

12. The surgical instrument of claim 11, wherein the electrokinetic output member is detachably connected to the manual force transmission portion.

13. The surgical instrument according to claim 12, wherein the operator further comprises a manual operation portion operated by a user to input a manual force, the manual force transmission portion being connected to the input member, the manual operation portion being connected to the manual force transmission portion.

14. The surgical instrument according to claim 12, further comprising an auxiliary operation member connected to the manual force transmission portion when the electric module is in the detached state, the auxiliary operation member being configured to transmit the manual force of the obtained user operation input to the manual force transmission portion.

15. The surgical instrument of claim 10, wherein the transmission mechanism comprises a switching mechanism, a cutting drive mechanism, and a jaw drive mechanism, the switching mechanism comprising the input, the input being configured to receive one of the electrical and manual forces, the switching mechanism being configured to selectively transmit the power to one of the cutting drive mechanism and the jaw drive mechanism, the cutting drive mechanism being configured to perform a feeding action or a retracting action when the input is received in the power, and the jaw drive mechanism being configured to perform a jaw closing action or a jaw opening action when the input is received in the power.

16. The surgical instrument of claim 15 wherein said operator drives said transmission mechanism to perform said retracting and said jaw opening actions.

17. The surgical instrument of claim 10, further comprising a reduction gearbox, wherein the operating member is connected to the input member through the reduction gearbox.