Handle with manual reset mechanism and anastomatTechnical Field
The invention relates to a handle with a manual reset mechanism and an anastomat.
Background
Laparoscopic staplers are common instruments in laparoscopic surgery, and currently, the main stream surgical consumable instrument manufacturers in the market all have corresponding instruments. The head end of the endoscope anastomat is a jaw which can be opened and closed, and after tissue is clamped, the firing handle is buckled to push the cutting knife and the wedge-shaped pushing block to advance, and meanwhile, the anastomat is pushed upwards and corresponding tissue is stapled.
In the using process of the anastomat, various unexpected situations can exist, such as the running stop of the instrument, such as the exhaustion of the battery, the signal loss of a circuit board, the damage of a motor and the like, at the moment, the cutting knife cannot be retracted and the jaw cannot be opened through key control, meanwhile, the motor is locked and cannot rotate due to the characteristics of the motor, and a gear or a rack meshed with a gear of the motor cannot move, so that the instrument cannot be separated from a patient, cannot be taken out from the abdominal cavity, and serious clinical consequences can be caused. Therefore, it is particularly necessary to design a safe and reliable manual reset mechanism.
At present, most companies (such as the American Qiangsheng company and most domestic factories) adopt the technical scheme that the motor output gear is meshed with the rack through a transmission gear, when the unlocking operation is needed, the transmission gear is pushed along the axial direction of the transmission gear to be separated from the rack, but the scheme has the defects that when the front end of an instrument is blocked, the rack cannot move, and the powerful output force of the motor enables a huge extrusion force to exist between the motor and the transmission gear, so that the friction force is increased, and the transmission gear can be pushed by a great force, and because the instrument is connected with a patient tissue, a user is difficult to apply a comfortable gesture force, and the unlocking cannot be caused. In order to solve the problem, only a complex cam lever mechanism can be designed to amplify the operation force, the cost is high, and meanwhile, a complex mechanism is also required to be designed to keep the transmission gear and the rack separated, so that the fault instrument is prevented from being used for the second time.
Disclosure of Invention
The invention aims to provide a labor-saving handle with a manual reset mechanism, which is simple in structure.
It is a further object of the present invention to provide a stapler comprising such a handle.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a handle with a manual reset mechanism, comprising:
a housing;
the driving assembly is arranged on the shell;
the transmission assembly comprises a transmission gear arranged on the shell and a rack extending along the front-back direction, the transmission gear is respectively and operably connected with the driving assembly and the rack, the transmission gear can rotate forward or reversely around the axis of the driving assembly and drive the rack to advance or retreat, and the axis of the transmission gear extends along the up-down direction;
The handle also includes a manual reset mechanism, the manual reset mechanism including:
The gear connecting rod is rotatably arranged in the shell around a first rotating axis, the first rotating axis is parallel to the axis of the transmission gear, and one end part of the gear connecting rod is connected to the transmission gear;
The operation assembly is connected to the gear connecting rod, when the operation assembly is operated, the gear connecting rod rotates around the first rotation axis under the drive of the operation assembly and drives the transmission gear to be connected with the rack and the driving assembly or disconnected with the rack and/or the driving assembly, and the operation assembly can be exposed to the shell;
and the retraction assembly is connected to the rack, and when the transmission gear is in a disconnection state with the rack and/or the driving assembly, the rack can be driven to advance or retract by operating the retraction assembly.
Preferably, the operation assembly comprises a first connecting rod and a second connecting rod, wherein one end of the first connecting rod is rotatably arranged on the gear connecting rod around a second rotation axis, one end of the second connecting rod is rotatably arranged in the shell around a third rotation axis, the other end of the second connecting rod is rotatably arranged on the middle part of the first connecting rod around a fourth rotation axis, and the second rotation axis, the third rotation axis, the fourth rotation axis and the first rotation axis are mutually parallel;
the first connecting rod is pulled outwards, the first connecting rod, the second connecting rod and the gear connecting rod are respectively rotated, and the transmission gear is driven to outwards move, so that the transmission gear is disconnected with the rack and/or the driving assembly.
Further, the manual reset mechanism further comprises a matching part fixedly arranged in the shell, the matching part is positioned between the rack and the operation assembly, and when the transmission gear is in a connection state with the rack and the driving assembly, the matching part is in contact with the first connecting rod and/or the second connecting rod.
In some preferred embodiments, the mating portion is a bump.
Further, the free ends of the protruding blocks are arc-shaped.
Preferably, when the transmission gear is converted from a state of connection with the rack and the driving assembly to a state of disconnection with the rack and/or the driving assembly, an angle between a plane in which the first rotation axis and the second rotation axis are located and the rack axis is gradually reduced.
In some specific embodiments, when the transmission gear is in a connection state with the rack and the driving assembly, an included angle between a plane where the first rotation axis and the second rotation axis are located and the rack axis is about 90 degrees, and further is 85-95 degrees.
Preferably, one end of the gear link has a receiving area for receiving the transmission gear, and the transmission gear is rotatably disposed in the receiving area.
Preferably, the manual reset mechanism further comprises a holding assembly for maintaining the transmission gear in a disconnected state from the rack and/or the drive assembly.
Further, the holding assembly comprises a holding hook and a torsion spring which are rotatably arranged in the shell around a fifth rotation axis, one end arm of the torsion spring is fixedly arranged in the shell, and the other end arm is fixedly connected to the holding hook;
When the transmission gear is in a connection state with the rack and the driving assembly, the holding hook is abutted against the end face of the other end part of the gear connecting rod, and when the transmission gear is in a disconnection state with the rack and/or the driving assembly, the hook part of the holding hook is inserted into the groove of the other end part of the gear connecting rod, and one end part of the gear connecting rod has a trend of outward movement.
Further, the groove is located at the outer side portion of the other end portion of the gear connecting rod, and the groove is provided with a matching surface matched with the hook portion of the holding hook.
Further, the mating surface is planar.
Preferably, the retraction assembly comprises a retraction pull rod fixedly connected to the rack and having one end extending out of the housing, the housing has a chute extending in a front-rear direction, and the retraction pull rod is located in the chute and is capable of sliding in the chute.
Preferably, the handle further comprises a frame arranged in the shell, and the gear connecting rod, the operation assembly and the holding assembly are respectively arranged on the frame.
Further, at least a portion of the frame is located between the rack and the gear link, operating assembly, and retaining assembly.
Preferably, the shell is provided with a hollowed-out operation window, the operation window is positioned on the shell outside the operation assembly, and the operation window can be selectively covered by a sticker.
Preferably, the driving assembly comprises a motor with a motor gear, the motor is located below the rack, the rotation axis of the motor gear is parallel to the rotation axis of the transmission gear, the transmission gear is located on the side face of the rack, the side face is provided with tooth surfaces, and when the transmission gear is connected with the driving assembly and the rack, the transmission gear is meshed with the tooth surfaces of the motor gear and the rack respectively.
Further, the motor gear and the rack are located on the same side of the transmission gear.
It is a further object of the present invention to provide a stapler comprising a working head, said stapler further comprising a handle as described above, said working head being connected to said handle.
The structure of the working head refers to the working head of the anastomat in the prior art.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
The manual reset mechanism in the handle of the invention enables the transmission gear to be disconnected with the rack or the driving component along the radial direction thereof through the design of the gear connecting rod, the operating component, the retaining component and the like, thereby saving labor and facilitating the operation of users.
Drawings
FIG. 1 is a schematic view of a handle according to an embodiment of the present invention;
FIG. 2 is an exploded view of the handle of FIG. 1;
FIG. 3 is a schematic view of the internal structure of the handle of FIG. 1;
FIG. 4 is a schematic view of the handle of FIG. 1 at another angle to the internal structure thereof;
FIG. 5 is a top view of the internal structure of the handle of FIG. 1;
FIG. 6 is a schematic view of the transmission gear and rack and/or drive assembly of the handle of FIG. 1 in a disconnected state;
FIG. 7 is a top view of the handle of FIG. 6;
FIG. 8 is a schematic view of the internal structure of the handle of FIG. 6;
FIG. 9 is a schematic view of the handle of FIG. 6 at another angle to the internal structure of the handle;
FIG. 10 is a top view of the internal structure of the handle of FIG. 6;
FIG. 11 is a schematic illustration of the transmission and drive assemblies and other structures comprising a handle according to one embodiment of the present invention;
FIG. 12 is a top view of the transmission and drive assemblies of FIG. 11 and other structures including a handle;
FIG. 13 is a schematic view of a gear link according to an embodiment of the present invention;
FIG. 14 is a schematic view of a stapler according to an embodiment of the present invention;
wherein, 1, a shell, 11, a first shell, 12, a second shell, 13, a chute, 14 and an operation window;
2. 21, motor gear;
3. 31, tooth surface;
4. A transmission gear;
5. Gear link, 51, distal end, 511, receiving area, 52, proximal end, 521, proximal end face, 522, groove, 523, mating face;
6. An operating assembly 61, a first link 62, a second link;
7. a holding component 71, a holding hook 711, a hook part 72 and a torsion spring;
8. A rollback pull rod;
9. 91, a matching part;
A. a1, an execution part;
a. the device comprises a first rotating shaft axis, a second rotating shaft axis, a third rotating shaft axis, a fourth rotating shaft axis, a fifth rotating shaft axis, a transmission gear shaft axis and a transmission gear shaft axis, wherein the first rotating shaft axis is a first rotating shaft axis;
x, front-back direction, y, left-right direction, z, up-down direction;
And gamma, the included angle between the plane where the first rotating axis and the second rotating axis are positioned and the axis of the rack.
Detailed Description
The invention is further described below with reference to examples. The present invention is not limited to the following examples. The implementation conditions adopted in the embodiments can be further adjusted according to different requirements of specific use, and the implementation conditions which are not noted are conventional conditions in the industry. The technical features of the various embodiments of the present invention may be combined with each other as long as they do not collide with each other.
Hereinafter, only certain exemplary embodiments are briefly described. As will be recognized by those of skill in the pertinent art, the described embodiments may be modified in numerous different ways without departing from the spirit or scope of the embodiments of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive.
In describing embodiments of the present invention, it should be understood that the terms "distal," "proximal," and the like indicate an orientation or positional relationship that is defined based on the orientation of the handle when in use, wherein the side closer to the operator is proximal and the side farther from the operator is distal, merely for convenience in describing embodiments of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting embodiments of the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more, unless explicitly defined otherwise.
The following disclosure provides many different implementations, or examples, for implementing different configurations of embodiments of the invention. In order to simplify the disclosure of embodiments of the present invention, components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit embodiments of the present invention. Furthermore, embodiments of the present invention may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed.
Example 1
The present invention provides a stapler, see fig. 14, which is generally used in laparoscopic surgery, for example by introducing a puncture device into the operative field, but it should be pointed out that it can also be used in open surgery.
Specifically, the anastomat comprises a handle and a working head A detachably connected with the handle, the distal end part of the working head A is an executing component A1 which is suitable for clamping, suturing/anastomosis, cutting and the like of tissues, and the specific structure and the connection mode of the working head A can refer to the prior art. The handle has a trigger, a holding portion, and the like, and when the trigger is pulled in the direction of the holding portion, the jaw of the actuator A1 can be closed, and the specific structure and connection relationship of the trigger, the holding portion, and the like can be realized.
The handle of the invention is provided with the manual reset mechanism, and when the handle stops running due to unexpected situations, the rack 3 can be reset through the manual reset mechanism, so that the cutter can be retracted. The handle is discussed further below.
The handle, see fig. 1-13, comprises a housing 1, a drive assembly and a transmission assembly respectively disposed within the housing 1, and a manual reset mechanism disposed at least partially within the housing 1.
Referring to fig. 11 and 12, the driving assembly includes a motor 2, and an output shaft of the motor 2 is provided with a motor gear 21 for outputting power. The transmission assembly comprises a rack 3 and a transmission gear 4. The rack 3 is slidably disposed in the housing 1 and extends in a front-rear direction x (i.e., x-direction), and the transmission gear 4 is operatively connected to the drive assembly and the rack 3, which is capable of rotating forward or backward about its axis and driving the rack 3 forward or backward under the drive of the drive assembly. Wherein the axis f of the transmission gear 4 and the axis f of the motor gear 21 are parallel to each other and extend in the up-down direction z (i.e., z direction).
Specifically, the rack 3 is located above the motor gear 21, the transmission gear 4 is located on a side surface of the rack 3 and a side surface of the motor gear 21 on the same side as the rack 3, the side surface of the rack 3 provided with the transmission gear 4 is provided with a tooth surface 31 matched with the transmission gear 4, so that the transmission gear 4 can be meshed with the rack 3 and the motor gear 21 at the same time, and when the motor 2 is started, the rack 3 can be driven to advance or retreat through the transmission gear 4.
The manual reset mechanism comprises a gear link 5 and an operating assembly 6. Specifically, referring to fig. 3 and 8, the gear link 5 is rotatably provided in the housing 1 about a first rotational axis a parallel to the axis f of the transmission gear 4, and one end of the gear link 5 is connected to the transmission gear 4. The operating assembly 6 is connected to the gear link 5, and when the operating assembly 6 is operated, the gear link 5 rotates about the first rotational axis a under the driving of the operating assembly 6, and drives the transmission gear 4 to be connected with the rack 3 and the driving assembly (at this time, the handle is in a locked state, see fig. 3 to 5) or disconnected with the rack 3 and/or the driving assembly (at this time, the handle is in an unlocked state, see fig. 8 to 10).
In the prior art, the transmission gear 4 is disengaged (i.e. unlocked) from the rack 3 or the motor gear 21 by moving the transmission gear 4 in the axial direction, and in particular, the transmission gear 4 may be moved upward or downward by applying an upward or downward force, so as to be disengaged from the rack 3 or the motor gear 21, for example, in patent CN111202553B, CN105997171B or the like. However, since a large pressing force exists between the motor 2 and the transmission gear 4 due to a strong output force after the motor 2 is locked, a large force is often required to be applied to disengage the transmission gear 4 from the rack 3 or the motor gear 21 in practice. According to the invention, the gear connecting rod 5 drives the transmission gear 4 to rotate, so that the transmission gear 4 is disengaged from the rack 3 and/or the driving assembly in the radial direction, and huge friction caused by lateral force when the transmission gear 4 moves in the axial direction is avoided, so that the labor is saved, and the operation of an operator is facilitated.
Further, the operating assembly 6 includes a first link 61 and a second link 62.
Referring to fig. 3 and 8, one end of the first link 61 is rotatably provided on the gear link 5 about the second rotation axis b. One end of the second link 62 is rotatably disposed in the housing 1 about a third rotation axis c, and the other end is rotatably disposed in the middle of the first link 61 about a fourth rotation axis d, the second rotation axis b, the third rotation axis c, and the fourth rotation axis d being parallel to the first rotation axis a. Pulling the first link 61 outwards, the first link 61, the second link 62, the gear link 5 each rotate and drive the transmission gear 4 outwards, disconnecting (i.e. disengaging) the transmission gear 4 from the rack 3 and/or the drive assembly. In this embodiment, the first link 61 is pulled outward, and the transmission gear 4 moves outward so that the transmission gear 4 is disengaged from both the rack 3 and the motor gear 21. The operating unit 6 of the present invention can amplify the force acting on the operating unit 6 by the design of the first link 61 and the second link 62, and the operator can easily pull out the operating lever. In addition, the structure is simple to manufacture, convenient to install and low in production cost.
Specifically, the first link 61 and the gear link 5 and the second link 62 are pivotally connected to the first link 61 and the housing 1, respectively.
Further, the manual reset mechanism further comprises a matching part 91 fixedly arranged in the shell 1, referring to fig. 4, 5, 9 and 10, the matching part 91 is positioned between the rack 3 and the operating component 6, when the transmission gear 4 is meshed with the rack 3 and the driving component, the matching part 91 is contacted with the first connecting rod 61 and/or the second connecting rod 62, so that a dead point for force transmission is formed by matching with the operating component 6, the handle can be kept in a locking state, and the handle cannot be unlocked accidentally even if the transmission gear 4 has larger lateral force, and the stability is good. In the present embodiment, referring to fig. 4 and 5, when the transmission gear 4 is engaged with the rack 3 and the driving assembly, the fitting portion 91 is in contact with the second link 62. In this embodiment, the mating portion 91 is a bump, and a free end of the bump is arc-shaped.
To facilitate the operator's operation of the operating assembly 6, the operating assembly 6 may be exposed to the housing 1. Specifically, the casing 1 outside the operating component 6 is provided with a hollowed operating window 14, and the operating window 14 can be optionally covered by a sticker, or an opening and closing component can be arranged to cover the operating window 14.
Referring to fig. 13, the gear link 5 includes a distal end portion 51 and a proximal end portion 52, wherein the distal end portion 51 has a receiving area 511 for receiving the transmission gear 4, and the transmission gear 4 is pivotally disposed within the receiving area 511. The proximal portion 52 is pivotally provided in the housing 1, the first link 61 is connected to the proximal portion 52, and a second rotational axis b between the first link 61 and the gear link 5 is located outside the first rotational axis a. When the handle is shifted from the locked state to the unlocked state, the angle γ between the plane in which the first rotation axis line a and the second rotation axis line b are located and the rack 3 axis line (the rack 3 axis line extends in the x direction) gradually decreases (see fig. 5 and 10). Preferably, the angle γ between the plane in which the first and second rotational axes a, b lie and the axis of the rack 3 is about 90 °, in particular 90 ° ± 5 °, when the handle is in the locked state.
Further, the end surface of the proximal portion 52 remote from the distal portion 51 is a proximal end surface 521, and the proximal end surface 521 is a plane. The proximal portion 52 has a recess 522 on the outside.
The handle further comprises a holding assembly 7 mainly for holding the transmission gear 4 disconnected from the rack 3 and/or the drive assembly, even if the handle is kept unlocked.
Specifically, referring to fig. 2 and 5, the holding assembly 7 includes a holding hook 71 rotatably provided in the housing 1 about a fifth rotation axis e, and a torsion spring 72, one end arm of the torsion spring 72 being fixedly provided in the housing 1, and the other end arm being fixedly connected to the holding hook 71. When the handle is in the locked state, see fig. 5, the holding hook 71 is abutted against the proximal end face 521 of the gear link 5, and when the handle is in the unlocked state, see fig. 10, the hook portion 711 of the holding hook 71 is inserted into the groove 522 of the proximal end portion 52 of the gear link 5, so that the distal end portion 51 of the gear link 5 has a tendency to move outward.
Further, the recess 522 of the proximal portion 52 has a mating surface 523 that mates with the hook 711 of the retaining hook 71. Preferably, the mating surface 523 is planar to facilitate insertion and removal of the hook.
The handle also includes a retraction assembly. The retraction assembly is connected to the rack 3, and when the transmission gear 4 is disconnected from the rack 3 and/or the drive assembly, the retraction assembly is operated to advance or retract the rack 3.
Specifically, referring to fig. 1 and 3, the retraction assembly includes a retraction lever 8, the retraction lever 8 is fixedly connected to the rack 3 and has one end extending out of the housing 1, the housing 1 has a sliding slot 13 extending in the front-rear direction x, and the retraction lever 8 is located in the sliding slot 13 and is capable of sliding in the sliding slot 13. Preferably, the end of the retracting lever 8 extending out of the housing 1 has a holding portion which is convenient for the operator to pull, and the shape of the holding portion can be set according to the need without being particularly limited.
The handle further comprises a frame 9 fixedly mounted in the housing 1, the frame 9 extending in the front-rear direction x and being non-interfering with the rack 3. The gear link 5, the operating unit 6, the holding unit 7, and the engaging portion 91 are provided on the frame 9, respectively. Further, the rack 9 is located between the rack 3 and the gear link 5, the operating assembly 6, the holding assembly 7, and the engaging portion 91.
The housing 1 includes a first casing 11 and a second casing 12 detachably connected, wherein an operation window 14 is provided on the first casing 11, and a chute 13 is formed in an intermediate portion between the first casing 11 and the second casing 12 and above the housing 1.
The anastomat or the handle has at least the following advantages:
1) The operation is simple and labor-saving, the transmission gear is disengaged from the rack and the motor gear along the radial direction, huge friction caused by lateral force during axial movement is avoided, meanwhile, through the design of the first connecting rod, the second connecting rod and the like, the user can easily pull out the first connecting rod, the transmission gear is disengaged from the motor gear and the rack, and the rack and the cutter are conveniently pulled back manually.
2) The device has high reliability, and in the locking state, the dead point of force transmission is formed by the cooperation of the operation assembly, the gear connecting rod and the cooperation part, so that the device can not be unlocked accidentally even if the transmission gear has larger lateral force.
3) The automatic locking is that after the transmission gear is disengaged, the transmission gear can be automatically locked at the disengaging position, so that the rack can be pulled back by manual operation, and the risk of secondary use of the fault instrument is avoided.
4) The production cost is low, the structure of matching a plurality of connecting rods is adopted, the manufacture is simple, the installation is convenient, and the cost is low.
The present invention has been described in detail with the purpose of enabling those skilled in the art to understand the contents of the present invention and to implement the same, but not to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of the present invention.