Disclosure of Invention
Therefore, the invention provides the surgical instrument which is convenient and quick to reset manually and has the handle shell restored to the original state after the manual reset is completed.
Aiming at the technical problems, the invention provides the following technical scheme:
A surgical instrument comprising a handle assembly including a handle housing and a drive assembly within the handle housing, the drive assembly including a drive motor and drive gear set adapted to provide drive to an end effector assembly, and a manual reset assembly adapted to cooperate with a clutch wrench operable to disengage the drive assembly from a drive connection by the manual reset assembly, wherein the handle housing is provided with at least one socket into which the wrench extends and a plug for plugging the socket, the plug including a plug portion cooperating with the socket and a reset extension connected to the plug portion, the plug portion entering the socket interior of the handle housing when the wrench is operated to move laterally inwardly along the handle housing, a portion of the reset extension being located outside the handle housing, the reset extension being operable to drive the plug portion to a position for plugging the socket when the wrench is operated to withdraw along the handle housing.
In some embodiments of the present invention, the insertion hole includes a main body hole and an auxiliary hole located at the lower side of the main body hole and communicating with the main body hole, the blocking portion of the hole plug is matched with the main body hole, and the partial region of the reset extension portion is matched with the auxiliary hole.
In some embodiments of the present invention, the main body hole is a circular hole, and the auxiliary hole is a strip hole.
In some embodiments of the present invention, the plugging portion of the plug is shaped to mate with the circular aperture, and the reset extension of the plug is shaped to mate with the elongated aperture, the reset extension having a length greater than the length of the elongated aperture.
In some embodiments of the present invention, an auxiliary plug is provided at an end of the reset extension portion away from the plugging portion.
In some embodiments of the present invention, the proximal end surface of the handle housing further includes a slot, where the slot is communicated with the jack, and includes a slot body with a notch and a strip-shaped groove body communicated with the notch, where the slot body of the slot is used for plugging the auxiliary plug, and the strip-shaped groove body of the slot is used for plugging the reset extension.
In some embodiments of the present invention, the plug is made of an elastic material, and when the plugging portion enters the inner side of the jack of the handle housing, the reset extension portion is elastically deformed, and when the wrench is operated to withdraw along the handle housing, the plugging portion moves in a direction approaching to the jack under the action of the elastic force of the reset extension portion until the jack is plugged.
In some embodiments of the present invention, the manual reset assembly further comprises a clutch screw operable by the wrench to rotate relative to the handle housing, and a gear bracket threadably coupled to the clutch screw, wherein a portion of the gear bracket acts on the drive gear set, and at least one of the receptacles is disposed opposite the clutch screw.
In some embodiments of the present invention, the wrench further comprises a shielding shell detachably covering the outer side of the handle assembly, wherein the proximal end of the shielding shell is provided with at least one jack into which the wrench is suitable for extending and a plug for plugging the jack.
In some embodiments of the invention, the proximal end of the shield housing is further provided with two receptacles adapted for insertion of a wrench, respectively, one of the receptacles being disposed opposite the crimp drive shaft and the other of the receptacles being disposed opposite the firing drive shaft.
In some embodiments of the present invention, the three insertion holes of the shielding shell are plugged by a hole plug, and the three insertion holes comprise a plug board and three plugs connected to one side surface of the plug board, and the three plugs are respectively inserted into the three insertion holes.
In some embodiments of the present invention, a connection slot is formed on a proximal end surface of the shielding shell, and a rotary plug is further disposed on a plug plate of the hole plug, and the rotary plug is inserted into the connection slot.
In some embodiments of the present invention, the proximal end surface of the shielding shell has a recessed area, three of the insertion holes are located in the recessed area, and the plug plate of the hole plug has a shape matching that of the recessed area.
The technical effects of the present invention compared with the prior art are partially explained in the detailed description.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, directly connected, or indirectly connected through an intermediary, or may be in communication with the interior of two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
In various embodiments of the present invention, "distal/side" refers to the end of the surgical instrument that is distal to the operator when operated, and "proximal/side" refers to the end/side of the surgical instrument that is proximal to the operator when operated.
The following is one embodiment of a surgical instrument. Generally, an embodiment of the surgical instrument described herein is an endoscopic surgical cutting anastomosis instrument. However, it should be noted that the surgical instrument may also be a non-endoscopic surgical cutting anastomosis instrument, such as an open surgical instrument for open surgery.
In particular, the surgical instrument 1 illustrated in fig. 1-3 includes a handle assembly 10, an elongate body assembly 20, and an end effector assembly 30 connected in sequence from a proximal end to a distal end. Wherein the end effector assembly 30 is configured to manipulate tissue to perform a particular surgical procedure, such as clamping, stapling/stapling, cutting, etc., the handle assembly includes a drive assembly configured to drive the end effector assembly 30 to perform clamping, stapling/stapling, cutting, etc., and the elongate body assembly 20 is configured to transmit a driving force of the handle assembly 10 to the end effector assembly 30. Wherein the elongate body assembly 20 and the end effector assembly 30 are both disposable components, and the handle assembly 10 is a reusable component.
Referring to fig. 1, the end effector assembly 30 includes a cartridge assembly 31 and an anvil assembly 32, with the cartridge assembly 31 and anvil assembly 32 being relatively movable to close the jaws to grasp tissue jaws. In a specific embodiment, anvil assembly 32 of end effector assembly 30 is operable to pivot toward cartridge assembly 31 until the jaws of end effector assembly 30 are closed to grasp tissue, and anvil assembly 32 is pivoted away from cartridge assembly 31 until the jaws of end effector assembly 30 are opened to release tissue. In an alternative embodiment, the cartridge assembly 31 of the end effector assembly 30 is operable to pivot the anvil assembly 32 until the jaws of the end effector assembly 30 are closed to clamp tissue, and the cartridge assembly 31 is operable to pivot away from the cartridge assembly 31 until the jaws of the end effector assembly 30 are opened to release tissue. Further, a movable firing member is disposed within the end effector assembly 30 for performing surgical actions, the firing member being operable to reciprocate, e.g., to perform corresponding surgical procedures, such as cutting and stapling of tissue, as the firing member is driven proximally to distally.
As shown in fig. 1-3, the elongate body assembly 20 is generally elongate and tubular in shape and includes a tubular housing defining a longitudinal axis C, and a drive rod disposed within the tubular housing for transmitting a driving force of the handle assembly 10 to the end effector assembly 30. The proximal side of the elongate body assembly 20 engages a swivel head assembly 23 that is capable of rotating the elongate body assembly 20 relative to the handle assembly 10 about a longitudinal axis C.
As shown in fig. 2 and 3, the handle assembly 10 includes a handle housing 11, the handle housing 11 having a generally T-shape overall, including a main body portion extending in a longitudinal axis direction C and a grip portion extending in a direction generally perpendicular to the longitudinal axis C or inclined at an angle to the longitudinal axis C, and a mounting space for a drive mechanism is formed in the handle housing 11. In a specific embodiment, as shown in fig. 4, the handle housing 11 of the handle assembly 10 is provided with an operation portion 113, the operation portion 113 is provided with a push button and/or push button structure, and a user performs closing and/or firing actions by manipulating the push button or push button on the operation portion 113. As shown in fig. 4-6, a drive assembly 12 is provided within the handle housing 11 for providing a driving force to the elongate body assembly 20 and the end effector assembly 30. In some embodiments, the driving assembly 12 includes a firing driving assembly 120 and a bending driving assembly 150, and correspondingly, the transmission rod in the elongated body assembly 20 includes a firing transmission rod 21 and a bending transmission rod 22, wherein the output end of the firing driving assembly 120 drives the firing transmission rod 21 of the elongated body assembly 20, and further drives the firing member of the end effector assembly 30 to reciprocate, so as to implement the closing and opening operations of the jaws of the end effector assembly 30, and the cutting and anastomosis operations of the tissue clamped in the jaws. The output end of the bending driving assembly 150 drives the bending transmission rod 22 of the slender body assembly 20 to further drive the bending member of the end effector assembly 30 to reciprocate, so that the bending operation of the end effector assembly 30 relative to the slender body assembly 20 is realized.
The rotator head assembly 23 is removably attached to the handle assembly 10 such that the handle assembly 10 with the drive assembly 12, and in particular the power unit, is reusable while the elongated body assembly 20 and portions of the end effector assembly 30 are disposable. The proximal ends of the firing transmission rod 21 and the bending transmission rod 22 extend to the outside of the rotary head assembly 23, and when the adapter 1 is engaged with the handle assembly 10, the proximal ends of the firing transmission rod 21 and the bending transmission rod 22 extend to the inside of the handle housing 11 and are respectively connected with the output end (for example, the firing sliding nut 125) of the firing driving assembly 120 and the output end (for example, the bending sliding nut 155) of the bending driving assembly 150, and the distal ends of the firing transmission rod 21 and the bending transmission rod 22 are respectively connected with the firing member and the bending member in the end executing assembly 30.
As further shown in fig. 2 and 3, to avoid contamination of the environment in the operating room, or of components or operators in contact therewith, by the portion of the reusable handle assembly 10 that is not completely sterilized or is not sterilized, the surgical instrument 1 further includes a shielding housing 40 removably covering the outside of the handle assembly 10. The shielding shell 40 is assembled by two detachable parts, and specifically comprises a proximal shielding shell 41 and a distal shielding shell 42, a cavity for placing the proximal part of the handle assembly 10 is formed inside the proximal shielding shell 41, a cavity for placing the distal part of the handle assembly 10 is formed inside the distal shielding shell 42, a first opening for allowing the proximal part of the handle assembly 10 to enter and exit the cavity is formed at the distal end of the proximal shielding shell 41, a second opening for allowing the proximal part of the handle assembly 10 to enter and exit the cavity is formed at the proximal end of the proximal shielding shell 41, and a buckle connection or other detachable connection mode is adopted between the proximal shielding shell 41 and the distal shielding shell 42, so that the first opening and the second opening are operatively connected and closed to form the sterile shielding shell 40 for enclosing the handle assembly 10 inside the sterile shielding shell. The distal end of the shield housing 40 abuts the proximal face of the rotator head assembly 23 such that the handle assembly 10 is entirely inside the shield housing 40, resulting in a sterile outer surface of the surgical instrument 1. Thus, through the above-mentioned shielding shell 40's setting, can set up aseptic barrier between handle assembly 10 and external environment, avoid having aseptic handle assembly 10 to expose and cause the pollution in the operation environment, realize having the multiplexing of fungus handle assembly 10, reduce operation cost.
Referring to fig. 5 and 6, a bracket 13 for supporting and mounting the driving assembly 12 is disposed in the handle housing 11, and the driving assembly 12 in the handle assembly 10 includes a driving motor and a driving gear set to convert the rotational motion generated by the driving motor into a reciprocating linear motion along the longitudinal axis C, so as to drive the transmission rod in the elongated body assembly 20 to reciprocate. In this embodiment, the handle assembly 10 includes two sets of drive assemblies, a first set of drive assemblies (hereinafter referred to as firing drive assembly 120) producing a drive force that drives the surgical instrument 1 to perform the closing, firing, and retraction reset operations, and a second set of drive assemblies (hereinafter referred to as deflection drive assembly 150) producing a drive force that drives the surgical instrument 1 to perform the deflection operations. The driving gear set comprises a driving wheel and a driven wheel.
Specifically, as shown in fig. 5, the firing drive assembly 120 comprises a firing drive motor 121 and a firing drive gear set, wherein the firing drive motor 121 is mounted on the proximal side of the bracket 13, the firing drive gear set comprises a firing driving wheel 122 in transmission connection with an output shaft of the firing drive motor 121 and a firing driven wheel 123 in transmission connection with the firing transmission rod 21, the firing driven wheel 123 is fixedly connected to a firing drive shaft 124, the firing drive shaft 124 is rotatably connected to the bracket 13, the distal side of the firing drive shaft 124 is a screw rod, the firing drive shaft 124 is provided with a firing sliding nut 125, a screw rod nut mechanism is formed, and the firing sliding nut 125 can be moved along the axial direction by rotating the firing drive shaft 124. The firing drive rod 21 of the elongate body assembly 20 is operably coupled to the firing slide nut 125, and the firing drive rod 21 is controlled to move in the longitudinal axis direction by controlling the firing drive motor 121.
Similarly, as shown in fig. 6, the bending drive assembly 150 includes a bending drive motor 151 and a bending drive gear set, the bending drive motor 151 being mounted on the proximal side of the bracket 13, the bending drive gear set including a bending drive wheel 152 drivingly connected to an output shaft of the bending drive motor 151 and a bending driven wheel 153 drivingly connected to the bending drive lever 22. The turning driven wheel 153 is fixedly connected to a turning driving shaft 154, the turning driving shaft 154 is rotatably connected to the bracket 13, a screw is arranged on the far side of the turning driving shaft 154, a turning sliding nut 155 is arranged on the turning driving shaft 154 to form a screw-nut mechanism, and the turning driving shaft 154 can enable the turning sliding nut 155 to move along the axial direction. The turn transmission rod 22 of the elongate body assembly 20 is operatively connected to the turn slip nut 155, and the turn transmission rod 22 is controlled to move in the longitudinal axis direction by controlling the turn drive motor 151.
It will be appreciated that in alternative embodiments, the handle assembly 10 may include only one set of drive assemblies 12 to provide the drive force to drive the surgical instrument 1 to perform the closing, firing, and retraction reset operations, while the manual crimping mechanism to drive the surgical instrument 1 to perform the crimping operations is driven by a transmission.
Since the surgical instrument 1 is driven by a motor, there is a certain risk of failure of the motor, for which purpose the surgical instrument 1 is further provided with a manual reset assembly 50 enabling the operator to return the surgical instrument 1 to a safe withdrawal from the body by manual operation, for example, the manual reset assembly 50 is adapted to release the drive connection of the drive motor to its drive assembly upon failure of the drive motor, and the manual reset assembly 50 is further adapted to manually reset the drive rod to an initial state for smooth removal of the surgical instrument 1 from the patient.
As shown in fig. 5 and 6, the manual reset assembly 50 comprises a clutch screw 51 positioned on the inner side of the handle shell 11, the clutch screw 51 is rotatably connected to the proximal end of the bracket 13, a gear bracket 52 which is connected to the clutch screw 51 in a threaded manner, the clutch screw 51 and the gear bracket 52 form a screw nut mechanism, the clutch screw 51 can drive the gear bracket 52 to move along the longitudinal axis direction by rotating, wherein a part area of the gear bracket 52 acts on a driving gear set, such as a driving wheel or a driven wheel of the driving gear set, when the gear bracket 52 moves along the axis direction of the clutch screw 51, the driving wheel or the driven wheel of the driving gear set is driven to move along the longitudinal axis direction, and the transmission state of the driving gear set is changed, for example, the driving gear set is changed from the engaged state to the disengaged state or the driving gear set is changed from the disengaged state to the engaged state. When the drive gear set is shifted from the engaged state to the disengaged state, the drive assembly is disengaged, avoiding continued actuation of the end effector assembly to reduce patient injury in the event of an emergency.
In order to facilitate the operator to operate the clutch screw 51 to rotate by pulling the wrench 53, a clutch rotary head 54 adapted to be matched with the wrench 53 is disposed at the proximal end of the clutch screw 51, as shown in fig. 5 and 6, the clutch rotary head 54 may be formed into a convex polygonal structure, and the end of the wrench 53 is correspondingly formed into a polygonal sleeve structure and is sleeved on the clutch rotary head 54. In other embodiments, the clutch rotary head 54 is formed as a block with polygonal grooves, and the end of the wrench 53 is formed as a polygonal protrusion. Meanwhile, the handle assembly 10 and the shielding shell 40 are provided with jack structures suitable for inserting a wrench 53.
For example, as shown in fig. 12 and 14, the proximal end of the handle housing 11 is provided with a socket 110 into which the wrench 53 is inserted, and a plug 111 for plugging the socket 110, the proximal end of the shield housing 40 is provided with a socket 410 into which the wrench 53 is inserted, and a plug 411 for plugging the socket 410, the sockets 110, 410 are disposed opposite to the position of the clutch screw 51, that is, the two-layer sockets 110, 410 are disposed coaxially opposite to the clutch screw 51. After opening the plugs 111, 411, the wrench 53 may then extend along the sockets 110, 410 until it engages the clutch rotor 54 of the clutch screw 51 to transmit rotational torque.
As shown in fig. 5 and 6, the gear bracket 52 acts on both the firing drive pulley 122 of the firing drive gear set and the kick drive pulley 152 of the kick drive gear set to simultaneously de-transmit the firing drive assembly 120 and the kick drive assembly 150 as the clutch screw 51 rotates. In other alternative embodiments, two gear brackets 52 may be provided to respectively de-transmit the firing drive assembly 120 and the bending drive assembly 150, and in addition, the gear brackets 52 may also act on the firing driven wheel 123 of the firing drive gear set and the bending driven wheel 153 of the bending drive gear set, which may also implement a change in the transmission state of the firing drive assembly 120 and the bending drive assembly 150.
As shown in fig. 6, the gear support 52 includes two driving support plates 521 disposed at opposite intervals, the upper ends of the two driving support plates 521 are connected by a connecting support plate 522, the two driving support plates 521 are respectively located at opposite sides of the bending driving wheel 152 and the firing driving wheel 122, in an initial state, the driving support plates 521 at the two sides are not in contact with the bending driving wheel 152 and the firing driving wheel 122, so as to avoid affecting the transmission efficiency, the gear support 52 is supported at the proximal end of the support 13 by a guide rod 55, that is, the guide rod 55 is fixedly connected to the support 13, the gear support 52 is sleeved on the guide rod 55 by a guide hole, and the gear support 52 horizontally moves along the axial direction of the guide rod 55 under the rotation action of the clutch screw 51. The proximal end of the guide rod 55 is provided with a catch disc to limit the maximum displacement position of the gear bracket 52.
Fig. 7-11 illustrate the manual resetting of the surgical instrument 1 according to an embodiment of the invention. Firstly, as shown in fig. 7 and 8, the firing driving assembly 120 and the bending driving assembly 150 in the handle assembly 10 are in a normal transmission state, that is, the driving gear set is in an engaged state, after the driving motor fails, the driving assembly cannot be driven by the motor, at this time, the hole plug 411 on the shielding shell 40 is opened, and the jack 410 can be exposed, so that the wrench 53 can enter the area between the shielding shell 40 and the handle shell 11 along the jack 410 of the shielding shell 40. As shown in fig. 9 and 10, the wrench 53 is operated to continue pushing toward the interior of the handle assembly 10, the insertion hole 110 of the handle housing 11 is opened by the wrench 53, a partial area of the hole plug 111 enters the interior of the handle housing 11, and the wrench 53 enters the interior of the handle housing 11 along the insertion hole 110 of the handle housing 11 and cooperates with the clutch rotator head 54 of the clutch screw 51. Next, turning the wrench 53 causes the gear support 52, which is threadably coupled to the clutch screw 51, to move proximally along the longitudinal axis C, and the gear support 52 drives the firing drive wheel 122 and the bending drive wheel 152 to move proximally until disengaged, as shown in fig. 11, to thereby effect the clutching of the drive motor and the drive gear set of the surgical instrument 1.
By doing so, the drive motor is clutched to the drive gear set, and then the drive rod in the elongate body assembly 20 is required to be returned to its original position by operating the wrench 53.
Taking the example of returning the firing transmission rod 21 to the initial position, further, a firing rotating head 124a is disposed at the proximal end of the firing driving shaft 124, the rotation torque of the wrench 53 is transmitted to the firing driving shaft 124 through the firing rotating head 124a, and the firing driving shaft 124 is rotated by operating the wrench 53, so that the firing sliding nut 125 drives the firing transmission rod 21 to perform a linear motion proximally, thereby returning to the initial position.
Further, if the end effector 30 is now in a bent position offset from the longitudinal axis C, it is also desirable to reposition and straighten the end effector 30 so that the surgical instrument 1 can be removed from the patient. Accordingly, the proximal end of the turn driving shaft 154 is provided with a turn rotating head 154a adapted to be engaged with the wrench 53, the rotational moment of the wrench 53 is transmitted to the turn driving shaft 154 through the turn rotating head 154a, and the turn driving shaft 154 is rotated by operating the wrench 53 to make the turn sliding nut 155 to move the turn driving rod 22 linearly proximally or distally, thereby returning to its original position.
Simultaneously, the proximal ends of the handle housing 11 and the shield housing 40 are respectively provided with two insertion holes 110 into which the wrench 53 is inserted and a hole plug 111 for plugging the insertion holes 110, wherein one of the two insertion holes 110 is disposed opposite to the position of the bending drive shaft 154, and the other is disposed opposite to the position of the firing drive shaft 124. The process of resetting the firing transmission rod 21 and the bending transmission rod 22 by using the wrench 53 is basically identical to the process of manually resetting by using the clutch wrench, and will not be described herein.
It will be understood, of course, that one wrench 53 may be provided to perform the clutch, firing reset and deflection reset operations, and that a plurality of wrenches 53 may be provided to perform the clutch, firing reset and deflection reset operations, respectively. As shown in fig. 7 to 11, the wrench 53 is integrally formed in a T shape, and includes a cylindrical or cylindrical lever and a handle disposed perpendicularly to the lever.
In order to facilitate the aseptic manipulation of the wrench 53 and the replacement of the hole stopper 111 in the handle assembly 10, as shown in fig. 12, the hole stopper 111 of the handle housing 11 includes a blocking portion 111a engaged with the insertion hole 110 and a replacement extension portion 111b connected to the blocking portion 111a, in which the blocking portion 111a of the hole stopper 111 is in sealing engagement with the insertion hole 110 in the initial state to isolate the inside from the outside of the handle housing 11, in which case when the wrench 53 is manually replaced, as shown in fig. 9 and 10, the blocking portion 111a of the hole stopper 111 enters the insertion hole 110 of the handle housing 11 when the wrench 53 is pushed to move along the outside of the handle housing 11 to the inside, and a partial region of the replacement extension portion 111b is located outside of the handle housing 11, and in which case when the wrench 53 is removed from the insertion hole 110, the blocking portion 111a of the hole stopper 111 is quickly pulled out along the insertion hole 110 and is again blocked on the insertion hole 110 by pulling the replacement extension portion 111 b.
To prevent the wrench 53 from entering the inside of the handle housing 11, the blocking portion 111a of the plug 111 blocks the wrench 53, as shown in fig. 13, the three insertion holes 110 (corresponding to the clutch screw 51, the bending drive shaft 154 and the firing drive shaft 124, respectively) on the proximal end surface of the handle housing 11 each include a main body hole 110a and an auxiliary hole 110b located at the lower side of the main body hole 110a and communicating with the main body hole 110a, the main body hole 110a is adapted to be inserted into the wrench 53, the blocking portion 111a of the plug 111 is engaged with the main body hole 110a, and a partial region of the reset extension 111b is engaged with the auxiliary hole 110 b. More specifically, the insertion hole 110 is integrally formed as a racket-like hole, i.e., the main body hole 110a is formed as a round hole resembling a racket face, and the auxiliary hole 110b is formed as a bar-like elongated hole, wherein the elongated hole is located at the lower side of the round hole. As described above, the hole plug 111 corresponding to the above-described insertion hole 110 includes the blocking portion 111a blocking the circular hole portion and the reset extension portion 111b, the reset extension portion 111b being adapted to cooperate with the auxiliary hole 110b to block the auxiliary hole 110b, the reset extension portion 111b having a length greater than that of the auxiliary hole 110 b. By adopting the structure of the jack 110 and the hole plug 111, the wrench 53 can be pushed or unlocked directly to move towards the inner side of the handle shell 11, so that the hole plug 111 enters the inner side of the handle shell 11 along the jack 110 for clutch operation, and the lower side of the round hole corresponding to the position of the wrench 53 is provided with a strip hole, which can lead the hole plug 111 to be bent downwards after entering the inner side of the handle shell 11, so that the wrench 53 is not influenced to act on the clutch screw 51 or the bending driving shaft 154 and the firing driving shaft 124, and meanwhile, as the hole plug 111 is provided with a reset extension part 111b with the length longer than that of the strip hole, the whole hole plug 111 can be prevented from entering the inner side of the handle shell 11. After the outer shielding shell 40 is removed after the current operation is finished, the hole plug 111 can be reset to the position of the jack 110 by pulling the reset extension part 111b of the hole plug 111, so that the repeated use of the hole plug 111 at the position of the jack 110 in the reset handle assembly 10 is realized, and the problem that the operation reliability of the internal driving assembly is influenced due to the fact that the hole plug 111 enters the inner side of the handle shell 11 is avoided.
In order to further improve the resetting reliability of the hole plug 111, as shown in fig. 12, an auxiliary plug 111c is disposed at an end portion of the resetting extension portion 111b, which is far away from the plugging portion 111a, and the proximal end surface of the handle housing 11 further includes a slot 112, where the slot 112 is communicated with the insertion hole 110, as shown in fig. 13, the slot 112 includes a circular slot body 112a and a strip slot body 112b, which is communicated with the circular slot body 112a, a part of the circular slot body 112a of the slot 112 is used for plugging the auxiliary plug 111c, and a part of the strip slot body 112b of the slot 112 is used for plugging the resetting extension portion 111b. By providing the auxiliary plug 111c, it is further avoided that the plug 111 is completely inserted into the handle housing 11 by the pushing force of the wrench 53. Meanwhile, the arrangement of the insertion groove 112 on the handle housing 11 can further improve the sealing property of the hole plug 111 and the insertion hole 110.
Correspondingly, as shown in fig. 14, the proximal end surface of the shielding shell 40 is also provided with three insertion holes 410, the three insertion holes 410 may be configured to be identical to the insertion holes 110 on the handle shell 11, and correspondingly, the hole plug 411 mated with the insertion holes 410 may also be configured as the hole plug 111 described above, which is not repeated. As another alternative embodiment, the three insertion holes 410 of the shielding shell 40 are respectively formed into circular holes, the three circular insertion holes 410 are plugged by a hole plug 411, the hole plug 411 is made of rubber material and comprises a plug plate 411a and three plug heads 411b connected to one side surface of the plug plate 411a, the three plug heads 411b are respectively inserted into the three insertion holes 410, and when the manual reset is performed, the three insertion holes 410 can be opened by inserting and pulling the hole plug 411 once, so that the manual reset is convenient for operators to use.
The proximal end surface of the shielding shell 40 is provided with a connecting notch 412, the plug plate 411a of the hole plug 411 is further provided with a rotating plug 411c, and the rotating plug 411c is rotatably inserted into the connecting notch 412, so that when the hole plug 411 is opened, the rotating plug 411c and the connecting notch 412 can be kept in a connecting state, the whole hole plug 411 is not required to be separated from the shielding shell 40, and the operation is further convenient.
In order to make the integrity of the shielding shell 40 better, the proximal end surface of the shielding shell 40 is provided with a concave area 413, three insertion holes 410 are positioned in the concave area 413, the shape of a plug plate 411a of the hole plug 411 is matched with that of the concave area 413, and the outer surface of the plug plate 411a is slightly lower than or even with that of the shielding shell 40, so that the shielding shell 40 has a relatively flat outer surface.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While obvious variations or modifications are contemplated as falling within the scope of the present invention.