CN117100346A

CN117100346A - Surgical instrument

Info

Publication number: CN117100346A
Application number: CN202311110621.0A
Authority: CN
Inventors: 饶志文; 倪畅; 李宇; 陈炜; 左鹏飞; 邓南方
Original assignee: Hangzhou Mindray Technology Co ltd
Current assignee: Hangzhou Mindray Technology Co ltd
Priority date: 2022-08-30
Filing date: 2023-08-30
Publication date: 2023-11-24

Abstract

A surgical instrument comprising an end effector, a barrel assembly and a handle assembly, the barrel assembly being connected between the end effector and the handle assembly, the barrel assembly for transmitting a driving force of the handle assembly to the end effector to provide a first driving force and a second driving force to the end effector; the handle assembly comprises a shell, a first transmission mechanism, a second transmission mechanism, a trigger mechanism and a switching mechanism, wherein the first transmission mechanism and the second transmission mechanism are accommodated in the shell, the first transmission mechanism is in transmission connection with the gun barrel assembly, the second transmission mechanism is in transmission connection with the end effector, and the switching mechanism is used for switching the trigger mechanism to be in transmission connection with the first transmission mechanism or the second transmission mechanism, so that the trigger mechanism can transmit a first driving force to the end effector through the first transmission mechanism or transmit a second driving force to the end effector through the second transmission mechanism.

Description

Surgical instrument

The present application claims priority from China patent application No. 202211049038.9, entitled surgical apparatus, filed on 8/30 in 2022, the entire contents of which are hereby incorporated by reference.

Technical Field

The invention relates to the field of medical instruments, in particular to a surgical instrument.

Background

In the related art, surgical instruments for suturing and cutting patient tissue can be broadly classified into the following two types: the first type is a dual trigger closure sleeve closure scheme and the second type is a single trigger i-beam closure scheme. Wherein the first type of surgical instrument comprises two triggers and two drive chains, wherein one trigger can drive the end effector to act through one drive chain so that the end effector clamps and squeezes the patient tissue; the other trigger may drive the end effector to act through the other drive train to cause the end effector to staple and cut the patient tissue. The second type of surgical instrument includes a single trigger and an i-beam drive train, with the trigger actuating the end effector via an i-beam to cause the end effector to grip and squeeze tissue and to staple and cut tissue.

Both types of surgical instruments have shortcomings in specific applications, as embodied below:

(1) The first type of surgical instrument employs a two-trigger and two-drive-train arrangement, is relatively complex in structure and operation, requires relatively high manipulation by the clinician, and is not conducive to single-handed operation by the clinician.

(2) The second type of surgical instrument is limited by the I-beam structure, so that the problem of small closing force exists when the end effector is used for clamping and squeezing thick patient tissues, the phenomenon of insufficient clamping and squeezing of the thick patient tissues is easy to occur, the yield of surgical staple forming in the process of suturing and cutting the patient tissues is low, and the surgical effect is seriously influenced.

Disclosure of Invention

The invention aims to provide a surgical instrument, which aims to solve the problems of complex transmission system and difficult operation of doctors caused by adopting double-trigger closure and the problems of small closing force and incomplete squeezing of thick patient tissues caused by adopting single-trigger closure and firing in the related technology.

In order to achieve the above purpose, the invention provides the following scheme: a surgical instrument comprising an end effector, a barrel assembly, and a handle assembly, the barrel assembly being connected between the end effector and the handle assembly, the barrel assembly for transmitting a driving force of the handle assembly to the end effector to provide a driving force to the end effector for clamping patient tissue and to provide a driving force for stapling and/or cutting patient tissue;

The handle assembly comprises a shell, a first transmission mechanism, a second transmission mechanism, a trigger mechanism and a switching mechanism with a first state and a second state, wherein the trigger mechanism and the switching mechanism are respectively at least partially arranged outside the shell, the first transmission mechanism and the second transmission mechanism are accommodated in the shell, the trigger mechanism is in transmission connection with the first transmission mechanism when the switching mechanism is in the first state, the first transmission mechanism is in transmission connection with the gun barrel assembly, the trigger mechanism is in transmission connection with the second transmission mechanism when the switching mechanism is in the second state, the second transmission mechanism is in transmission connection with the gun barrel assembly, and the gun barrel assembly is in transmission connection with the end effector;

when the switching mechanism is in the first state, the trigger mechanism transmits a driving force for clamping patient tissue to the end effector through the first transmission mechanism and the barrel assembly; the trigger mechanism transmits a driving force for stapling and/or cutting patient tissue to the end effector through the second transmission mechanism and the barrel assembly when the switching mechanism is in the second state.

In one embodiment of the surgical instrument of the present invention, the end effector comprises a first jaw and a second jaw, the first driving force being a force that drives the first jaw and the second jaw closed, the second driving force being a force that drives the end effector to staple and/or cut patient tissue.

In one embodiment of the present invention, the barrel assembly includes a closure sleeve coupled between the first drive mechanism and the end effector and a firing bar coupled between the second drive mechanism and the end effector; the closing sleeve is used for driving the first jaw and the second jaw to close under the action of the first driving force, and the firing bar is used for driving the end effector to suture and/or cut patient tissues under the action of the second driving force.

In one embodiment of the present invention, the first transmission mechanism comprises a sliding member and a rotating member, the distal end of the sliding member is in transmission connection with the closure sleeve, and the trigger mechanism is in transmission connection with the proximal end of the sliding member through the rotating member; the sliding member is disposed between the barrel assembly and the rotating member and is movable along a length of the barrel assembly.

In the surgical instrument according to an embodiment of the present invention, the rotating member is provided with a first rotating portion and an arc-shaped groove located outside the first rotating portion, the trigger mechanism is provided with a second rotating portion and a protruding column, the first rotating portion is rotatably connected with the second rotating portion, and the protruding column is disposed in the arc-shaped groove in a penetrating manner and can slide reciprocally in the arc-shaped groove, so as to drive the rotating member to rotate, thereby driving the sliding member and the closure sleeve to move from the proximal end to the distal end, so as to drive the first jaw and the second jaw to close.

In the surgical instrument according to one embodiment of the present invention, the rotating member is further provided with a second protrusion and an arc-shaped outer wall surface located outside the arc-shaped groove, and the second protrusion is protruded on the arc-shaped outer wall surface and is used for pressing the sliding member when the end effector performs a closing action, so as to drive the sliding member to move toward the end effector.

In one embodiment of the surgical instrument of the present invention, the trigger mechanism comprises a trigger, a first driving part and an elastic reset piece for resetting the trigger, wherein the trigger is rotatably connected to the housing, and two ends of the elastic reset piece are respectively abutted against the trigger and the housing;

The first transmission mechanism and the first driving part are respectively in transmission connection with the trigger, the switching mechanism enables the first driving part to be separated from transmission connection with the second transmission mechanism in the first state, and enables the first driving part to be in transmission connection with the second transmission mechanism in the second state.

In one embodiment of the present invention, the second transmission mechanism includes a first transmission member in driving connection with the barrel assembly;

the first driving member abuts against the first transmission member when the switching mechanism is switched from the first state to the second state, and drives the first transmission member to transmit the second driving force to the end effector when the trigger is operated.

In one embodiment of the surgical instrument of the present invention, the first transmission member comprises a rack and the first drive member comprises a pawl and a first resilient member;

the rack is connected in the shell in a sliding manner, the pawl is connected to the trigger in a rotating manner, two ends of the first elastic piece are respectively abutted to the pawl and the trigger, and the pawl is driven to be abutted to the rack when the switching mechanism is switched from the first state to the second state.

In one embodiment of the surgical instrument, the switching mechanism includes an actuating member that drivingly couples the trigger mechanism and the second drive mechanism when the end effector is in the closed state; the actuating member decouples the trigger mechanism from the second transmission mechanism when the end effector is in the open state.

In one embodiment of the surgical instrument of the present invention, the switching mechanism includes a first switching member and a second switching member, the first switching member driving the actuating member to drivingly connect the trigger mechanism to the second transmission mechanism; the actuating component is used for enabling the trigger mechanism to be disconnected from the second transmission mechanism under the action of the second switching component.

In the surgical instrument according to an embodiment of the present invention, the actuating member includes a reset member and a pressing member, the reset member is connected to the first transmission member, and the pressing member is elastically connected to the housing and presses against the reset member, so that the first driving member is disconnected from the first transmission member under the pressing of the reset member;

The first switching part is connected with the pressing part and used for driving the pressing part to release the pressing of the reset part.

In an embodiment of the surgical instrument, the pressing part comprises a second elastic member and a pressing block movably mounted in the housing, the pressing block comprises a pressing part, a triggering part and a connecting part, the pressing part is pressed against the resetting part, the second elastic member is elastically connected between the connecting part and the housing, and the triggering part is abutted against the first switching part so that the first switching part drives the pressing block to move.

In a surgical instrument according to an embodiment of the invention, the trigger portion includes a ramp surface that abuts the first switching member.

In the surgical instrument according to an embodiment of the present invention, the reset member includes a reset plate main body and a first protrusion, the first protrusion is protruding on a side portion of the reset plate main body opposite to the first driving member, the reset plate main body is movably connected with the first transmission member and abuts against the first driving member, and the abutting portion abuts against the first protrusion, so as to limit a position of the reset member and release limit of the reset member under the driving of the first switching member.

In the surgical instrument according to an embodiment of the present invention, the actuating member further includes a third elastic member for driving the restoring member to move when the pressing portion releases the restriction of the restoring member, so as to move the first protrusion between the pressing portion and the end effector, and move the restoring plate body to a position releasing the pressing against the first driving member.

In the surgical instrument according to one embodiment of the present invention, the handle assembly further includes a first fastener, the reset plate body is provided with a first connection hole, and the first fastener is penetrated in the first connection hole and connected with the first transmission part;

the size of the first connecting hole in the first direction is larger than that of a part, penetrating through the first connecting hole, of the first fastening piece in the first direction, so that the reset part can reciprocate relative to the first fastening piece in the first direction, and an included angle between the first direction and the length direction of the gun barrel assembly is larger than 0 degree and smaller than 90 degrees.

In one embodiment of the surgical instrument of the present invention, the first transmission member is provided with a chute, and the reset blade body is slidably mounted in the chute.

In the surgical instrument according to an embodiment of the present invention, the second switching member is connected to or integrally formed with the reset member; the second switching part is provided with a first control part, and the first control part is used for being held by an operator so as to drive the second switching part to drive the reset part and the first transmission part to move in a direction away from the end effector.

In the surgical instrument according to an embodiment of the present invention, the first switching member includes a switching control member and a fourth elastic member, the switching control member is mounted on the housing and is in transmission connection with the executing member, and two ends of the fourth elastic member are respectively abutted against the switching control member and the housing.

In one embodiment of the surgical instrument, the end effector further comprises an eighth resilient member for driving the end effector to perform an opening action when the closure sleeve releases a closure force on the end effector.

In the surgical instrument according to an embodiment of the present invention, the handle assembly includes a release mechanism, wherein the first jaw and the second jaw are configured to clamp patient tissue when closed, and the release mechanism is configured to limit movement of the first transmission mechanism in a direction to open the first jaw and the second jaw when the first transmission mechanism moves to a predetermined position during a process of driving the first jaw and the second jaw to close.

In one embodiment of the surgical instrument, the first transmission mechanism includes a fifth elastic member elastically connected between the housing and the sliding member of the first transmission mechanism for driving the sliding member to slide in a direction away from the end effector when the release mechanism releases the restriction of the first transmission mechanism, so that the first jaw and the second jaw perform an opening action.

In the surgical instrument according to an embodiment of the present invention, the release mechanism includes a release member rotatably connected in the housing, and a sixth elastic member connected to the release member and the housing, respectively, for driving the release member to rotate and limiting the first transmission mechanism when the first transmission mechanism drives the first jaw and the second jaw to perform a closing action, so that the first jaw and the second jaw maintain a closed state.

In one embodiment of the surgical instrument, the release member is provided with a clamping groove for clamping and positioning a part of the first transmission mechanism when the first jaw and the second jaw are in a closed state.

In the surgical instrument according to an embodiment of the present invention, the release member is provided with a second manipulation portion, and the second manipulation portion is exposed outside the housing and is used for being held by an operator to drive the release member to move, so that the release member can release the limit of the first transmission mechanism.

In one embodiment of the surgical instrument, the handle assembly further comprises a locking mechanism for switching to a locked position to limit the release mechanism when the switching mechanism is operated, thereby preventing the release mechanism from being operated out of the locked position.

In one embodiment of the surgical instrument, the locking mechanism includes a locking member movably coupled within the housing and a seventh elastic member coupled to the locking member and the housing, respectively, for driving the locking member to a position to lock the release mechanism when the switching mechanism is operated and for providing a force to lock the release mechanism to the locking member when the end effector performs a stapling and/or cutting action on patient tissue.

In a surgical instrument according to an embodiment of the present invention, the trigger mechanism and the switching mechanism are each partially disposed outside the housing.

In one embodiment of the surgical instrument of the present invention, the trigger mechanism comprises a first drive member and a trigger rotatably coupled within the housing, the trigger being drivingly coupled to the first and/or second drive mechanisms via the first drive member, the switching mechanism being operative to disengage the first drive member from the second drive mechanism in the first state and operative to drivingly couple the first drive member to the second drive mechanism in the second state.

In one embodiment of the present invention, the trigger comprises a first trigger and a second trigger adapted to snap together with the first trigger, the first trigger being in driving connection with the first drive member, the second trigger being adapted to drive the first drive mechanism in a direction to open the end effector during a closing motion of the end effector.

In one embodiment of the present invention, the trigger comprises a trigger body and a linkage, the trigger body being coupled to the linkage and movable relative to the linkage such that the linkage is configured to drive the first drive member in motion when the trigger body is operated; or when the trigger body moves relative to the linkage, the trigger body can drive the first transmission mechanism to move towards the direction of opening the end effector.

In the surgical instrument according to an embodiment of the present invention, the trigger body is provided with a trigger driving portion, a trigger limiting portion and a second rotating portion, the linkage member is rotatably connected to the second rotating portion, the trigger limiting portion is connected to the linkage member and is used for preventing the linkage member from rotating relative to the trigger, and the trigger driving portion is used for driving the first transmission mechanism to move when the trigger body rotates relative to the linkage member.

In one embodiment of the present invention, the trigger includes a trigger body and a pressure receiving portion extending from one end of the trigger body and bending a predetermined angle such that the trigger body is capable of generating a rotational stroke relative to the housing when operated, the rotational stroke including a first rotational stroke and a second rotational stroke;

when the trigger body rotates for the first rotating stroke, the pressed part drives the first transmission mechanism to control the end effector to perform the action of clamping the patient tissue; when the trigger body rotates for the second rotation stroke, the pressed part drives the second transmission mechanism to control the end effector to perform suturing and/or cutting actions on patient tissues; and the trigger body is also used for driving the first transmission mechanism to move towards the direction of opening the end effector.

In one embodiment of the surgical instrument of the present invention, the first transmission mechanism includes a connecting bracket and a closing slide capable of being in transmission connection with the first driving part, the connecting bracket is slidably connected to the housing, and the closing slide is in transmission connection with the barrel assembly and the connecting bracket.

In the surgical instrument according to one embodiment of the present invention, the first transmission mechanism further includes a support slider that is capable of being drivingly connected to the trigger, and the support slider is disposed on a side of the connection bracket away from the closure slider, such that the trigger is capable of driving the first transmission mechanism to move in a direction to open the end effector by the support slider.

the rack is connected in the shell in a sliding manner, the pawl is connected to the trigger in a rotating manner, two ends of the first elastic piece are respectively abutted to the pawl and the trigger, and the first elastic piece is used for driving the pawl to be abutted to the rack when the switching mechanism is operated.

In one embodiment of the surgical instrument, the switching mechanism comprises a switching control component which is elastically connected to the shell and is pressed against the first driving component or the second transmission mechanism; or,

the switching mechanism comprises a switching control part, a switching chute is arranged in the shell, the switching chute is provided with a release part and a locking part, and the switching control part is movably arranged in the switching chute.

According to a second aspect of the present application, there is also provided a surgical instrument comprising an end effector, a barrel assembly, and a handle assembly, wherein the end effector is configured to perform at least one of clamping, stapling, and cutting actions on tissue of a patient;

the barrel assembly is connected between the end effector and the handle assembly, and the barrel assembly is used for transmitting the driving force of the handle assembly to the end effector so as to provide driving force for clamping patient tissues to the end effector and driving force for suturing and/or cutting patient tissues;

the handle assembly comprises a housing, a first transmission mechanism, a second transmission mechanism, an operable trigger mechanism and an operable switching mechanism, wherein the housing is used for accommodating at least part of structures of the first transmission mechanism and the second transmission mechanism, and at least part of the trigger mechanism and the switching mechanism are operably arranged outside the housing;

The first transmission mechanism is in transmission connection between the trigger mechanism and the gun barrel assembly, and is used for transmitting driving force for clamping patient tissues to the end effector through the first transmission mechanism when the trigger mechanism is operated;

the switching mechanism is used for connecting the trigger mechanism with the second transmission mechanism in a transmission way when the trigger mechanism is operated, so as to transmit the driving force for suturing and/or cutting the tissue of a patient to the end effector through the second transmission mechanism when the trigger mechanism is operated.

In the surgical instrument according to the embodiment of the present invention, the switching mechanism is provided between a portion where the trigger mechanism is connected to the housing and the barrel assembly in a longitudinal direction of the barrel assembly.

In one embodiment of the surgical instrument of the present invention, the second transmission mechanism includes a first transmission part, the trigger mechanism includes a trigger, an elastic reset member and a first driving part, one end of the trigger is rotatably connected to the housing, and two ends of the elastic reset member are respectively abutted to the trigger and the housing, so as to drive the trigger to reset when an operator releases the trigger;

The first transmission mechanism and the first driving part are respectively connected with the trigger;

the first transmission component is connected with the gun barrel assembly;

the switching mechanism is used for enabling the first driving part to be abutted against the first transmission part when being operated;

the first driving component is used for driving the first transmission component to drive the end effector to perform suturing and/or cutting actions of patient tissues under the condition of abutting against the first transmission component and when the trigger is operated.

In one embodiment of the surgical instrument, the handle assembly further comprises an actuating member for pressing against the first drive member to disengage the first drive member from the first transmission member when the end effector is in the open state;

the switching mechanism is used for driving the executing component to release the acting force on the first driving component when being operated so as to enable the first driving component to be abutted against the first transmission component.

In one embodiment of the surgical instrument of the present invention, the first transmission member comprises a rack, the first drive member comprises a pawl and a first elastic member, and the rack is slidably coupled to the housing;

The pawl is rotatably connected to the trigger;

the first elastic piece is respectively abutted against the pawl and the trigger and used for driving the pawl to move to a position abutted against the rack when the switching mechanism is operated to drive the actuating component to release the acting force on the first driving component.

In one embodiment of the surgical instrument of the present invention, the actuating member includes a return member and a pressing member, the return member being connected to the first transmission member;

the pressing component is elastically connected to the shell and is used for pressing the reset component when the end effector is in an open state so as to enable the reset component to press the first driving component to enable the first driving component to be separated from the first transmission component;

the switching mechanism is connected with the pressing component and is used for driving the pressing component to release the pressing of the reset component when being operated so as to enable the first driving component to be in abutting fit with the first transmission component.

In an embodiment of the surgical instrument, the pressing part includes a pressing block and a second elastic member, the pressing block is movably installed in the housing, the second elastic member is elastically connected between the pressing block and the housing, the pressing block includes a pressing part, a triggering part and a connecting part, the connecting part is connected with the second elastic member, the triggering part is abutted with the switching mechanism for driving movement of the switching mechanism, and the pressing part is used for pressing against the reset part.

In one embodiment of the surgical instrument, the trigger portion includes a sloped surface that abuts the switching mechanism.

In the surgical instrument according to an embodiment of the present invention, the reset member includes a reset plate main body and a first protrusion, the reset plate main body is movably connected to the first transmission member, and the reset plate main body is configured to press the first driving member under the action of the pressing member so as to disengage the first driving member from the first transmission member;

the first bulge is convexly arranged on the side part of the reset sheet main body, which is opposite to the first driving part;

the pressing part is used for pressing against the first bulge when the end effector is in an open state so as to limit the movement of the first bulge towards the end effector, and is used for limiting the movement of the reset sheet main body towards a direction away from the first driving part when the end effector is in the open state;

the switching mechanism is used for driving the pressing block to move when being operated so that the pressing part releases the limit of the first bulge and the reset sheet main body;

the actuating member further includes a third elastic member for driving the reset member to move to a position between the pressing portion and the end effector and the reset sheet body to release the first driving member when the pressing portion releases the limit to the first protrusion and the reset sheet body.

In one embodiment of the surgical instrument of the present invention, the handle assembly further comprises a first fastener for threading the reduction blade body and the first transmission member;

the reset piece main body is provided with a first connecting hole for the first fastening piece to penetrate and connect, the size of the first connecting hole in the first direction is larger than the size of the first fastening piece penetrating and locating part in the first connecting hole in the first direction, so that the reset part can reciprocate relative to the first fastening piece in the first direction, and the first direction and the length direction of the gun barrel assembly have an included angle larger than 0 DEG and smaller than 90 deg.

In a surgical instrument of an embodiment of the invention, the end effector includes a firing actuation assembly for stapling and/or severing patient tissue when fired;

the actuating component further comprises a second switching component, the second switching component is connected with the reset component or integrally formed with the reset component, the second switching component is provided with a first control part, the first control part is used for being held by an operator to drive the second switching component to drive the reset component and the first transmission component to move in the direction away from the end actuating actuator, so that the first transmission component drives the firing actuating component to execute the action of restoring to the initial firing position.

In the surgical instrument according to an embodiment of the present invention, the switching mechanism includes a first switching member including a switching control member and a fourth elastic member, the switching control member being at least partially exposed outside the housing for moving against the actuating member under the driving action of the operator to release the force applied to the first driving member by the actuating member;

the fourth elastic piece is used for driving the switching control component to reset when an operator releases the driving action on the switching control component.

In one embodiment of the present invention, the first transmission mechanism includes a sliding member slidably coupled to the housing and coupled to the barrel assembly;

the rotating member is connected with the trigger mechanism and is configured to rotate under the drive of the trigger mechanism and to drive the sliding member to slide toward the end effector to cause the first and second jaws to perform a closing action.

In one embodiment of the present invention, the sliding member is located between the barrel assembly and the rotating member in the length direction of the barrel assembly.

In the surgical instrument according to an embodiment of the present invention, the rotating member is provided with a first rotating portion and an arc-shaped groove located at an outer periphery of the first rotating portion;

the trigger mechanism is provided with a second rotating part and a convex column, the first rotating part is rotatably connected with the second rotating part, the convex column penetrates through the arc-shaped groove, the convex column is used for propping against the wall surface of the arc-shaped groove from the opening to the closing of the first jaw and the second jaw so as to enable the rotating part to rotate, and the convex column is also used for reciprocating rotation in the arc-shaped groove in the process of executing suturing and/or cutting tissue actions of a patient by the end effector.

In the surgical instrument according to an embodiment of the present invention, the rotating member is further provided with an arc-shaped outer wall surface and a second projection, the arc-shaped outer wall surface being located at the outer periphery of the arc-shaped groove;

the second protrusion is arranged on a local part of the arc-shaped outer wall surface in a protruding mode, and the second protrusion is used for propping against the sliding part to move towards the end effector when the first jaw and the second jaw execute closing actions.

In one embodiment of the surgical instrument of the present invention, the end effector comprises a first jaw and a second jaw for grasping patient tissue when closed;

The handle assembly further comprises a release mechanism for switching to a locking position when the first transmission mechanism drives the first jaw and the second jaw to move to a preset position in the process of closing, so that the first transmission mechanism is prevented from moving in the direction of opening the first jaw and the second jaw.

In one embodiment of the surgical instrument of the present invention, the release mechanism is disposed on a side of the first transmission mechanism remote from the end effector in a longitudinal direction of the barrel assembly.

In one embodiment of the surgical instrument, the release mechanism is further configured to disengage the locking position when operated, such that the release mechanism releases the limit on the first drive mechanism to permit movement of the first drive mechanism in a direction to open the first jaw and the second jaw.

In one embodiment of the surgical instrument of the present invention, the first transmission mechanism includes a movable member movably coupled to the trigger mechanism and/or the housing and a fifth elastic member, and the movable member is coupled to the barrel assembly;

the release mechanism is used for limiting the movable part when the locking position is adopted so as to keep the first jaw and the second jaw in a closed state;

The fifth elastic piece is elastically connected between the movable part and the shell, and is used for driving the movable part to move so as to enable the first jaw and the second jaw to execute opening actions when the release mechanism is separated from the locking position to release limit of the movable part.

In one embodiment of the present invention, the movable member includes a sliding member slidably coupled to the housing and coupled to the barrel assembly;

the rotating part is connected with the trigger mechanism and is used for rotating under the drive of the trigger mechanism and driving the sliding part to slide towards the end effector so as to enable the first jaw and the second jaw to execute a closing action;

the release mechanism is used for limiting the rotating part when the locking position is adopted so as to keep the first jaw and the second jaw in a closed state;

the fifth elastic piece is elastically connected between the sliding part and the shell, and is used for driving the sliding part to slide in a direction away from the end effector so as to enable the first jaw and the second jaw to execute an opening action when the release mechanism is separated from the locking position to release the limit of the rotating part.

In one embodiment of the surgical instrument of the present invention, the release mechanism includes a release member rotatably coupled to the housing and a sixth elastic member;

the sixth elastic piece is respectively connected with the release part and the shell, and is used for driving the release part to rotate to the locking position so as to limit the first transmission mechanism and enable the first jaw and the second jaw to keep the closed state when the trigger mechanism drives the first jaw and the second jaw to execute the closing action.

In one embodiment of the surgical instrument, the release member is provided with a clamping groove for the first transmission mechanism to be partially clamped and positioned when the first jaw and the second jaw are in a closed state.

In the surgical instrument according to an embodiment of the present invention, the sixth elastic member is a first coil spring, two ends of the first coil spring are respectively abutted against the housing and the release member, and the housing and/or the release member is provided with a guide post for penetrating into the first coil spring to guide and limit the first coil spring; or,

The sixth elastic piece is a first torsion spring, the first torsion spring is rotatably connected with the shell, and two ends of the first torsion spring are respectively abutted to the shell and the release part.

In the surgical instrument according to an embodiment of the present invention, the release member is provided with a second control portion, the second control portion is exposed outside the housing, and the second control portion is used for being held by an operator to drive the release member to move, so that the release member is separated from the locking position, and limit on the first transmission mechanism is released.

In one embodiment of the surgical instrument of the present invention, the end effector further comprises a firing actuation assembly for stapling and/or cutting patient tissue when fired;

the handle assembly further includes a locking mechanism for switching to a locked position when the switching mechanism is operated to limit the release mechanism to prevent the release mechanism from being operated out of the locked position.

In one embodiment of the present invention, the locking mechanism limits the release mechanism from a side of the release mechanism remote from the end effector along the length of the barrel assembly; and/or the number of the groups of groups,

The part of the release mechanism, which is connected with the shell, is arranged between the first transmission mechanism and the locking mechanism in the length direction of the gun barrel assembly.

In the surgical instrument according to an embodiment of the present invention, the locking mechanism is further configured to drive the release mechanism to move when the actuating member is operated to return the firing actuation assembly to the firing initial position, such that the release mechanism releases the limit on the first transmission mechanism, thereby causing the first jaw and the second jaw to perform an opening action.

In one embodiment of the present invention, the locking mechanism includes a locking member movably coupled to the housing and a seventh spring coupled to the locking member and the housing, respectively, and configured to actuate the locking member to a position locking the release mechanism when the switching mechanism is operated and to provide a force to lock the release mechanism to the locking member when the firing execution assembly performs a stapling and/or cutting action on patient tissue.

In one embodiment of the surgical instrument, the gun tube assembly comprises a closing sleeve and a firing bar, wherein the closing sleeve is connected between the first transmission mechanism and the end effector, and the closing sleeve is used for driving the end effector to perform a closing action under the drive of the first transmission mechanism so as to clamp patient tissues;

the end effector further comprises an eighth resilient member for driving the first and second jaws to perform an opening action when the closure sleeve releases a closing force on the first and second jaws;

the firing bar is connected between the second transmission mechanism and the end effector, and is used for driving the end effector to execute firing actions to stitch and/or cut patient tissues and is used for driving the end effector to execute actions of recovering to a firing initial position.

In one embodiment of the surgical instrument, the firing bar is partially movably disposed within the closure sleeve.

The technical scheme provided by the embodiment of the application can have the following beneficial effects: the present application provides surgical instruments by providing two drive chains of a first drive mechanism and a second drive mechanism between a single trigger mechanism and an end effector, and providing the first drive mechanism to transmit a driving force to the end effector for clamping patient tissue when the trigger mechanism is operated.

Meanwhile, the switching mechanism is used for triggering the transmission chain of the second transmission mechanism, so that the trigger mechanism is connected to the second transmission mechanism in a transmission way when the switching mechanism is operated, under the condition that the second transmission mechanism is connected to the trigger mechanism in a transmission way, when the trigger mechanism is operated, the driving force for suturing and/or cutting the patient tissue is transmitted to the end effector through the second transmission mechanism, thereby realizing the functions of clamping and suturing and cutting the patient tissue by a single trigger mechanism through the two transmission chains.

In addition, because the end effector adopts two mutually independent transmission chains when clamping and squeezing the patient tissues and when suturing and cutting the patient tissues, the closed clamping driving force of the end effector is not influenced by a suturing and cutting structure, the end effector is beneficial to ensuring that the end effector has larger closing force when clamping and squeezing the thick patient tissues, the sufficiency of clamping and squeezing the thick patient tissues is ensured, and further the effect of surgery is beneficial to improvement.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application as claimed.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic perspective view of a surgical instrument provided in an embodiment of the present invention with a second side housing removed and an end effector in an open position;

FIG. 2 is a schematic front view of FIG. 1;

FIG. 3 is a schematic view of the handle assembly portion of FIG. 2;

FIG. 4 is a schematic perspective view of a surgical instrument provided in an embodiment of the present invention with a second side housing removed and with an end effector in a closed position;

FIG. 5 is a schematic view of the handle assembly portion of FIG. 4;

FIG. 6 is a schematic view of a surgical instrument according to an embodiment of the present invention after a second side housing is removed, and after an actuating member drives a firing reset mechanism to retract until a driving portion abuts against a gear portion;

FIG. 7 is a schematic view of the handle assembly portion of FIG. 6;

FIG. 8 is a schematic view of the handle assembly provided in an embodiment of the present invention with the housing removed and the end effector in a closed position;

FIG. 9 is an exploded view of a first transmission member, a reset member, a second switching member, a third spring member and a first fastener provided in an embodiment of the present invention;

FIG. 10 is a schematic diagram of a reset device according to an embodiment of the present invention;

FIG. 11 is a schematic view of a locking member according to an embodiment of the present invention from one perspective;

FIG. 12 is a schematic view of another view of a locking member provided by an embodiment of the present invention;

FIG. 13 is a schematic view of a release member according to an embodiment of the present invention from one perspective;

FIG. 14 is a schematic view of another view of a release member provided by an embodiment of the present invention;

FIG. 15 is a schematic view of a rotating member according to an embodiment of the present invention;

FIG. 16 is a schematic view of the structure of a trigger provided by an embodiment of the present invention;

FIG. 17 is a partial schematic view of a surgical instrument provided in accordance with yet another embodiment of the present invention;

FIG. 18 is a partial schematic view of the surgical instrument of FIG. 17 at another angle;

FIG. 19 is a partial schematic view of a surgical instrument provided in accordance with yet another embodiment of the invention;

FIG. 20 is a schematic view of a portion of the trigger mechanism of FIG. 19;

FIG. 21 is a schematic view of a surgical instrument according to a final embodiment of the present invention;

Fig. 22 is a schematic view of another state of the surgical instrument of fig. 21.

Reference numerals illustrate:

100. an end effector; 110. a first jaw; 120. a second jaw;

200. a barrel assembly; 210. closing the sleeve; 220. a firing bar;

300. a handle assembly; 310. a housing; 311. a first side case; 320. a first transmission mechanism; 321. a movable member; 3211. a sliding member; 3212. a rotating member; 3201. a first rotating part; 3202. an arc-shaped groove; 3203. a closed end; 3204. an open end; 3205. an arc-shaped outer wall surface; 3206. a second protrusion; 322. a fifth elastic member; 330. a second transmission mechanism; 331. a first transmission member; 3311. a rack; 3312. a chute; 3313. a slide hole; 340. a trigger mechanism; 341. a trigger; 341a, a first trigger; 341b, a second trigger; 341c, a trigger body; 341d, linkage; 341e, a pressure receiving portion; 3411. a second rotating part; 3412. a convex column; 3413. a limit elastic member; 3414. a trigger limit part; 3415. a trigger driving part; 342. an elastic reset piece; 343. a first driving part; 3431. a pawl; 3432. a first elastic member; 350. a switching mechanism; 350a, a first switching member; 351a, switching the control member; 352a, a fourth elastic member; 350b, a second switching part; 351b, a first manipulation unit; 352b, connecting rods; 360. an execution part; 361. a reset member; 3611. a reset sheet main body; 3612. a first protrusion; 3613. a first connection hole; 3614. a third connection hole; 362. a pressing member; 3621. briquetting; 3601. a pressing part; 3602. a trigger part; 3603. a connection part; 3604. an inclined plane; 3622. a second elastic member; 363. a third elastic member; 370. a first fastener; 380. a release mechanism; 381. a release member; 3811. a clamping groove; 3812. a guide post; 3813. a second control section; 3814. a gear part; 3815. a second locking portion; 382. a sixth elastic member; 383. a second rotating shaft; 390. a locking mechanism; 391. a locking member; 3911. a sliding part; 3901. a first limit groove; 3912. a first locking portion; 3913. a pushing part; 3914. a driving section; 3915. a lug; 3916. the first limiting boss; 392. and a seventh elastic member.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. 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.

Reference numerals in the claims are merely used to aid in the understanding of the way and are not intended to limit the features or structures in the drawings which show only one embodiment.

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. 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.

It should be noted that all directional indications (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship between the components, the movement condition, etc. in a specific posture, and if the specific posture is changed, the directional indication is changed accordingly.

It will also be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or be indirectly connected to the other element through intervening elements.

Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is 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 at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

As shown in fig. 1-22, the surgical instrument provided by the embodiment of the present invention includes an end effector 100, a barrel assembly 200, and a handle assembly 300, the barrel assembly 200 being connected between the end effector 100 and the handle assembly 300, the barrel assembly 200 being configured to transmit a driving force of the handle assembly 300 to the end effector 100 to provide a first driving force as well as a second driving force to the end effector 100.

Illustratively, the handle assembly 300 is primarily intended for grasping and manipulation by an operator to provide a first driving force as well as a second driving force to the action of the end effector 100. The barrel assembly 200 is connected between the end effector 100 and the handle assembly 300 for transmitting a first driving force and a second driving force of the handle assembly 300 to the end effector 100, i.e., the barrel assembly 200 is primarily used for transmitting the driving force of the handle assembly 300 to the end effector 100 for actuating the end effector 100. The end effector 100 may be fixedly attached to one end of the barrel assembly 200 or may be removably attached to one end of the barrel assembly 200. When the end effector 100 is detachably coupled to the barrel assembly 200, the surgical instrument may be adapted to the application requirements of different applications by changing different types and sizes of end effectors 100.

Referring to fig. 1 and 2, as one embodiment, the handle assembly 300 includes a housing 310, a first transmission mechanism 320, a second transmission mechanism 330, a trigger mechanism 340, and a switch mechanism 350 having a first state and a second state, the first transmission mechanism 320 and the second transmission mechanism 330 being housed within the housing 310, the trigger mechanism 340 being in driving connection with the first transmission mechanism 320 when the switch mechanism 350 is in the first state, and the first transmission mechanism 320 being in driving connection with the barrel assembly 200; the trigger mechanism 340 is in driving connection with the second transmission mechanism 330 when the switch mechanism 350 is in the second state, and the second transmission mechanism 330 is in driving connection with the barrel assembly 200, and the barrel assembly 200 is in driving connection with the end effector 100.

Wherein the trigger mechanism 340 and the switch mechanism 350 are each at least partially disposed outside of the housing 310, the handle assembly 300 includes a single trigger mechanism 340 as the trigger mechanism 340, i.e., the handle assembly 300 has only one trigger mechanism 340. The operation of the trigger mechanism 340 is specifically referred to as the trigger mechanism 340 being operable by an operator, i.e., the trigger mechanism 340 is a manual manipulation mechanism.

As one embodiment, the switching mechanism 350 is a manually operable mechanism that is switchable between a first state and a second state, i.e., when the switching mechanism 350 is in the first state, the trigger mechanism 340 transmits a first driving force to the end effector 100 via the first transmission mechanism 320 and the barrel assembly 200; when the switching mechanism 350 is in the second state, the trigger mechanism 340 transmits a second driving force to the end effector 100 through the second transmission mechanism 330 and the barrel assembly 200.

As one embodiment, the end effector 100 includes a first jaw 110 and a second jaw 120, wherein the first driving force is a force that drives the first jaw 110 and the second jaw 120 closed, and the second driving force is a force that drives the end effector 100 to suture and/or cut patient tissue such that the end effector 100 is configured to perform at least one of a clamping, suturing, and cutting action on the patient tissue.

Referring to fig. 1-3, as one embodiment, a first transmission 320 is drivingly coupled between the trigger 340 and the barrel assembly 200, and the first transmission 320 is configured to transmit a first driving force for clamping patient tissue to the end effector 100 via the first transmission 320 when the trigger 340 is operated.

Wherein the drive connection between the second drive mechanism 330 and the trigger mechanism 340 can be cut off and connected, the switching mechanism 350 is adapted to drive the trigger mechanism 340 to the second drive mechanism 330 when operated, i.e. the switching mechanism 350 can trigger the trigger mechanism 340 to drive to the second drive mechanism 330 when operated. The second transmission mechanism 330 may be drivingly connected between the trigger mechanism 340 and the barrel assembly 200 upon actuation of the switching mechanism 350.

Specifically, a portion of the second transmission 330 is coupled to the barrel assembly 200, and another portion of the second transmission 330 may be drivingly coupled to the trigger mechanism 340 upon actuation of the switching mechanism 350. In the case where the second transmission mechanism 330 is drivingly connected to the trigger mechanism 340, the trigger mechanism 340 may transmit a second driving force for stapling and/or cutting patient tissue to the end effector 100 through the second transmission mechanism 330 when the trigger mechanism 340 is operated. The first transmission 320 and the second transmission 330 are two different transmission chains for transmitting different driving forces, respectively.

In this embodiment, through the arrangement of the two transmission chains and the switching mechanism 350, the single trigger mechanism 340 can be used for clamping and squeezing the patient tissue and suturing and cutting the patient tissue in a time-sharing manner, and the structure is simple, the operation is convenient for the operator to operate with one hand, and the operation is simple and convenient.

In addition, because the end effector 100 adopts two mutually independent transmission chains when clamping and squeezing the patient tissue and when suturing and cutting the patient tissue, the closed clamping driving force of the end effector 100 is not affected by the suturing and cutting structure, which is beneficial to ensuring that the end effector 100 has larger closing force when clamping and squeezing the thick patient tissue, ensuring the sufficiency of clamping and squeezing the thick patient tissue, and further being beneficial to improving the effect of the operation.

Referring to fig. 1 and 2, as one embodiment, the end effector 100 includes a firing reset mechanism (not shown) for clamping patient tissue to be stapled and/or severed when closed, and a firing reset mechanism for stapling and/or severing patient tissue when fired.

Wherein one of the first jaw 110 and the second jaw 120 is provided with a staple cartridge and the other is provided with an anvil. The firing reset mechanism includes surgical staples and/or a movable cutting knife that are removably stored within the staple cartridge and an anvil for deforming the staples as they are deployed from the staple cartridge. The end of the first jaw 110 near the barrel assembly 200 is rotatably connected to the end of the second jaw 120 near the barrel assembly 200, so that the first jaw 110 and the second jaw 120 can perform opening and closing actions under the driving of an external force.

As one embodiment, the end effector 100 further includes an eighth elastic member (not shown) elastically coupled between the first jaw 110 and the second jaw 120, and configured to provide a driving force for the first jaw 110 and the second jaw 120 to move toward the opening direction.

Specifically, the eighth elastic member is used to drive the first jaw 110 and the second jaw 120 to perform an opening action when the barrel assembly 200 is such that the closing force to the first jaw 110 and the second jaw 120 is released. In a particular application, the eighth resilient member is compressed when the barrel assembly 200 provides a closing driving force to the first jaw 110 and the second jaw 120; when the barrel assembly 200 releases the closing driving force to the first and second jaws 110 and 120, the first and second jaws 110 and 120 are opened by the elastic restoring force of the eighth elastic member.

Referring to fig. 1, 2, 3 and 8, as one embodiment, the barrel assembly 200 includes a closure sleeve 210 and a firing bar 220, the closure sleeve 210 being coupled between the first drive mechanism 320 and the end effector 100, the closure sleeve 210 being configured to drive the first jaw 110 and the second jaw 120 closed under a first drive force, and the firing bar 220 being configured to drive the end effector 100 to staple and/or cut patient tissue under a second drive force.

Illustratively, the closure sleeve 210 is driven by the first transmission mechanism 320 to drive the end effector 100 to perform a closing motion to clamp the patient tissue, and is driven by the first transmission mechanism 320 to release the closing driving force to the end effector 100 to automatically perform an opening motion to loosen the patient tissue. An eighth elastic member elastically coupled between the first jaw 110 and the second jaw 120 for driving the first jaw 110 and the second jaw 120 to perform an opening action when the closing sleeve 210 releases the closing force to the first jaw 110 and the second jaw 120.

The firing bar 220 is connected between the second transmission mechanism 330 and the end effector 100, and the firing bar 220 is used for driving the end effector 100 to perform a firing motion to stitch and/or cut patient tissue and for driving the end effector 100 to perform a motion of returning to a firing initial position. Both the closure sleeve 210 and the firing bar 220 may translate in a generally linear direction. One end of the closing sleeve 210 is connected with the first transmission mechanism 320, and the other end is slidably sleeved outside the first jaw 110 and the second jaw 120. One end of the firing bar 220 is connected with the second transmission mechanism 330, and the other end is connected with the firing reset mechanism.

In particular applications, first jaw 110 and second jaw 120 may be driven to close when closure sleeve 210 is linearly moved away from handle assembly 300 by first drive mechanism 320; when the closure sleeve 210 is linearly moved in a direction approaching the handle assembly 300 by the first transmission mechanism 320, the first jaw 110 and the second jaw 120 may be driven to open. When the firing bar 220 is linearly moved away from the handle assembly 300 under the drive of the second transmission mechanism 330 in the closed state of the first jaw 110 and the second jaw 120, the staples may be driven to staple patient tissue and/or the knife may be driven to cut patient tissue; when the firing bar 220 is linearly moved in a direction approaching the handle assembly 300 under the driving of the second transmission mechanism 330, the cutter retracting reset can be driven.

In this embodiment, the closing of the end effector 100 by using the closing sleeve 210 is beneficial to ensuring that the end effector 100 has a larger closing force when clamping and squeezing thick patient tissues, ensuring the adequacy of the end effector 100 in clamping and squeezing the thick patient tissues, and ensuring high yield of surgical staple forming in the process of suturing and cutting the patient tissues.

As one embodiment, a portion of the firing bar 220 may be movably disposed through the closure sleeve 210, i.e., the firing bar 220 may be linearly reciprocally movable within the closure sleeve 210. In this embodiment, by housing a portion of the firing bar 220 within the closure sleeve 210, it is beneficial to both improve the compactness of the surgical instrument structure and to avoid interference between the firing bar 220 and the closure sleeve 210.

Referring to fig. 2, 3 and 5, as an embodiment, the housing 310 includes a first side housing 311 and a second side housing (not shown), and the first side housing 311 and the second side housing are spliced and enclosed to form an inner cavity, and at least part of structures of the first transmission mechanism 320 and the second transmission mechanism 330 are accommodated in the inner cavity.

Referring to fig. 1, 2, 5, and 17 to 22, as an embodiment, the trigger mechanism 340 includes a first driving part 343 and a trigger 341 rotatably connected to the housing 310, and the first driving part 343 and the first driving part 320 are respectively in driving connection with the trigger 341. The switching mechanism 350 in a first state enables the first driving part 343 to be disconnected from the second transmission mechanism 330, and in a second state enables the first driving part 343 to be in transmission connection with the second transmission mechanism 330.

Referring to fig. 1, 2 and 3, as one embodiment, the first transmission mechanism (320) includes a sliding member 3211 and a rotating member 3212, the sliding member 3211 being slidably coupled to the housing 310 and to the barrel assembly 200. The rotating member 3212 is coupled to the trigger mechanism 340, and the rotating member 3212 is configured to rotate under the drive of the trigger mechanism 340 and to drive the sliding member 3211 to slide toward the end effector 100 to cause the first jaw 110 and the second jaw 120 to perform a closing motion.

Wherein, the distal end of the sliding component 3211 is connected with one end of the closing sleeve 210, and the trigger mechanism 340 is in transmission connection with the proximal end of the sliding component 3211 through the rotating component 3212, so as to drive the closing sleeve 210 to slide reciprocally.

In this embodiment, the sliding member 3211 and the rotating member 3212 are separately provided, that is, the movable member 321 is divided into two parts, that is, the sliding member 3211 and the rotating member 3212, which is advantageous in that the rotation driving force of the trigger 341 is converted into the linear transmission power and transmitted to the closure sleeve 210, and the linear moving part and the rotating part are separately designed, manufactured and installed, which is advantageous in that the production, the manufacture and the installation of the movable member 321 are facilitated. Of course, in a specific application, the movable member 321 may be designed as a single integral member, that is, the sliding member 3211 and the rotating member 3212 may be integrally formed.

Referring to fig. 1, 2, 3, 15, and 16, as an embodiment, the rotating member 3212 is provided with a first rotating part 3201 and an arc-shaped groove 3202, the arc-shaped groove 3202 being located at an outer circumference of the first rotating part 3201; the trigger mechanism 340 is provided with a second rotating portion 3411 and a boss 3412, where the first rotating portion 3201 is rotatably connected to the second rotating portion 3411, and the boss 3412 is disposed in the arc-shaped groove 3202 and can slide reciprocally in the arc-shaped groove 3202, so as to drive the rotating member 3212 to rotate, thereby driving the sliding member 3211 and the closure sleeve 210 to move from the proximal end to the distal end, so as to drive the first jaw 110 and the second jaw 120 to close.

Illustratively, during the opening to closing of first jaw 110 and second jaw 120, posts 3412 bear against the walls of arcuate slot 3202 to rotate rotating member 3212. In addition, post 3412 reciprocates within arcuate slot 3202 during the stapling and/or severing actions of tissue from a patient performed by end effector 100.

The second rotating portion 3411 and the boss 3412 are specifically disposed on the trigger 341, and at least one end of the arc-shaped groove 3202 in the circumferential direction is a closed end 3203. When the first jaw 110 and the second jaw 120 are in an opened state, the trigger 341 is manipulated to enable the boss 3412 to rotate around the second rotating portion 3411 along the arc track of the arc groove 3202, when the boss 3412 moves to be propped against the closed end 3203, the boss 3412 can prop against the closed end 3203 to drive the rotating member 3212 to rotate together until the trigger 341 moves to a limit position, the rotating member 3212 also moves to a limit position for closing the first jaw 110 and the second jaw 120, at this time, the rotating member 3212 keeps a state for closing the first jaw 110 and the second jaw 120 under the limit action of the release mechanism 380, the trigger 341 is reset under the action of the elastic reset piece 342, and the boss 3412 rotates around the second rotating portion 3411 in the arc groove 3202 to be reset; during the stapling and/or severing of tissue from a patient by the end effector 100, the posts 3412 simply reciprocate within the arcuate slot 3202 without rotating against the rotating member 3212 because the rotating member 3212 is constrained to maintain a limit position that closes the first and second jaws 110, 120.

As an embodiment, the arc-shaped groove 3202 has a closed end 3203 at one end and an open end 3204 at the other end, and the boss 3412 can rotate around the second rotating portion 3411 against the closed end 3203. Of course, in particular applications, the arcuate slot 3202 may be designed with both ends closed in the circumferential direction as an alternative embodiment.

Referring to fig. 1, 2, 3 and 15, as an embodiment, the rotating member 3212 is further provided with an arc-shaped outer wall surface 3205 and a second protrusion 3206, and the arc-shaped outer wall surface 3205 is located at the outer circumference of the arc-shaped groove 3202; second projection 3206 is disposed on arcuate outer wall surface 3205, and second projection 3206 is configured to drive sliding member 3211 against sliding member 3211 toward end effector 100 when first jaw 110 and second jaw 120 perform a closing motion.

By providing the second protrusions 3206, a distance from a local part of an outer wall surface of the rotating member 3212 to the first rotating portion 3201 is greater than a distance from other parts to the first rotating portion 3201, so that the rotating member 3212 can move linearly against the sliding member 3211 when rotating.

In one embodiment, the rotating member 3212 is plate-shaped, the first rotating portion 3201 is a shaft hole provided in the rotating member 3212 in the thickness direction of the rotating member 3212, the second rotating portion 3411 is a protruding shaft protruding from the trigger 341, and the protruding shaft is inserted into the shaft hole, so that the rotating member 3212 and the trigger 341 are connected. Of course, in a specific application, as an alternative embodiment, the first rotating portion 3201 may be provided as a protruding shaft protruding from the rotating member 3212, and the second rotating portion 3411 may be configured as a shaft hole provided on the trigger 341.

In one embodiment, the rotational axis of the rotational member 3212 is coaxial with the rotational axis of the trigger 341 and the rotational axis of the trigger 341 indirectly to the housing 310.

As an embodiment, the sliding member 3211 is located between the barrel assembly 200 and the rotating member 3212 in the length direction of the barrel assembly 200, that is: the sliding member 3211 is located on the rear side of the barrel assembly 200 and on the front side of the rotating member 3212.

In one embodiment, the rotating member 3212 is disposed between the sliding member 3211 and the release mechanism 380 along the length of the barrel assembly 200.

In one embodiment, the first switching member 350a is disposed between the barrel assembly 200 and the rotating member 3212 in the longitudinal direction of the barrel assembly 200.

As an embodiment, referring to fig. 1, 2 and 5, the second transmission mechanism 330 is in transmission connection with the first driving part 343, and the first transmission mechanism 320 and the first driving part 343 are respectively in transmission connection with the trigger 341, so that the trigger 341 can transmit a driving force for clamping the patient tissue to the end effector 100 through the first transmission mechanism 320. Wherein the first driving member 343 abuts against the first transmission member 331 when the switching mechanism 350 is switched from the first state to the second state, and drives the first transmission member 331 to transmit the second driving force to the end effector 100 when the trigger 341 is operated.

As shown in fig. 17 to 22, the first transmission 320 and the second transmission 330 are each in transmission connection with a first drive member 343, the first drive member 343 being in transmission connection with the trigger 341. Before the first switching part 350a of the switching mechanism 350 is triggered, the first driving part 343 is disconnected from the second transmission mechanism 330, and the trigger 341 drives the first transmission mechanism 320 to transmit the driving force for clamping the patient tissue to the end effector 100 through the first driving part 343; when the first switching member 350a of the switching mechanism 350 is triggered, the first driving member 343 is in driving connection with the second transmission mechanism 330, and the trigger mechanism 340 drives the second transmission mechanism 330 through the first driving member 343 to transmit driving force for suturing and/or cutting patient tissue to the end effector 100.

Referring to fig. 1, 2 and 5, as an embodiment, the trigger mechanism 340 further includes an elastic restoring member 342, and two ends of the elastic restoring member 342 are respectively abutted against the trigger 341 and the housing 310 for restoring the trigger 341. The actuating element 360 is pressed against the first driving element 343, so that the first driving element 343 can be in or out of driving connection with the second transmission 330.

Illustratively, one end of the trigger 341 is rotatably connected to the housing 310, and two ends of the elastic restoring member 342 are respectively abutted against the trigger 341 and the housing 310, so as to drive the trigger 341 to be restored when the operator releases the trigger 341. Wherein the trigger mechanism 340 includes a single trigger 341, i.e., one trigger 341. Operability of the trigger 341 is achieved by rotatable connection of the trigger 341 with the housing 310. The first transmission mechanism 320 is drivingly connected to the trigger 341, and the second transmission mechanism 330 may be drivingly connected to the trigger 341 upon actuation of the first switching element 350 a.

Referring to fig. 1, 2, 3 and 5, as an embodiment, the first transmission member 331 includes a rack 3311, the first driving member 343 includes a pawl 3431 and a first elastic member 3432, the rack 3311 is slidably connected to the housing 310, the pawl 3431 is rotatably connected to the trigger 341, and both ends of the first elastic member 3432 are respectively abutted to the pawl 3431 and the trigger 341, so as to drive the pawl 3431 to be abutted to the rack 3311 when the switching mechanism 350 is switched from the first state to the second state.

Wherein the rack 3311 is reciprocally movable along the length of the barrel assembly 200 by external force. Before the first switching member 350a of the switching mechanism 350 is triggered, the pawl 3431 is disengaged from the rack 3311; after the first switching member 350a of the switching mechanism 350 is triggered, the pawl 3431 is in driving connection with the rack 3311, and when the trigger 341 is operated to rotate, the pawl 3431 can rotate along with the trigger 341 and drive the rack 3311 to linearly move towards the end effector 100, thereby driving the end effector 100 to perform suturing and/or cutting operations on patient tissue. In this embodiment, the second transmission mechanism 330 and the trigger mechanism 340 are connected in a transmission manner by adopting the cooperation of the rack 3311 and the pawl 3431, which is beneficial to converting the rotation power of the trigger 341 into the linear motion power of the first transmission member 331 and to realize the separable connection of the first transmission member 331 and the first driving member 343. Of course, in specific applications, the transmission connection between the second transmission mechanism 330 and the trigger mechanism 340 is not limited thereto, and for example, the rack 3311 and the gear may be used.

As one embodiment, the first elastic member 3432 is a torsion spring, the middle portion of which is sleeved on the trigger 341, one end of the torsion spring abuts against the pawl 3431, and the other end abuts against the housing 310. Of course, in a specific application, the arrangement manner of the first elastic member 3432 is not limited thereto, for example, in an alternative embodiment, the first elastic member 3432 may also be a spring plate or a coil spring, where two ends of the spring plate or the coil spring respectively abut against the pawl 3431 and the trigger 341.

Referring to fig. 1, 2, 3, 7 and 8, as one embodiment, the switching mechanism 350 includes an actuator 360, the actuator 360 drivingly connecting the trigger mechanism 340 to the second drive mechanism 330 when the end effector 100 is in the closed state; the actuation member 360 decouples the trigger mechanism 340 from the second transmission 330 when the end effector 100 is in the open state.

Illustratively, when the end effector 100 is in the closed position, the actuation member 360 drivingly couples the trigger mechanism 340 with the second transmission 330 such that the trigger mechanism 340 is capable of transmitting a driving force for stapling and/or cutting patient tissue to the end effector 100 via the second transmission 330 and the barrel assembly 200; the actuation member 360 decouples the trigger mechanism 340 from the second transmission mechanism 330 when the end effector 100 is in the open state, avoiding the trigger mechanism 340 from driving the second transmission mechanism 330 to transmit a driving force to the end effector 100 for stapling and/or cutting patient tissue when the end effector 100 is in the open state.

Illustratively, the switching mechanism 350 includes a first switching member 350a and a second switching member 350b, the first switching member 350a driving the actuator 360 to drivingly connect the trigger mechanism 340 to the second transmission 330; the actuator 360, under the action of the second switching member 350b, disengages the trigger mechanism 340 from the second transmission 330.

It should be noted that, the first switching part 350a and the executing part 360 may be in a split structure and movably connected together through a transmission assembly; alternatively, the first switching member 350a may be integrally formed with the actuating member 360; that is, the executing part 360 is a part of the structure of the first switching part 350a, or the first switching part 350a is a part of the structure of the executing part 360. The actuating member 360 may press against at least one of the trigger mechanism 340 and the second transmission mechanism 330, so that the second transmission mechanism 330 can be disconnected from the trigger mechanism 340.

Referring to fig. 1, 2 and 3, as an embodiment, the first transmission member 331 is connected to the barrel assembly 200, and the first driving member 343 abuts against the first transmission member 331 when the actuating member 360 releases the force to the first driving member 343, and drives the first transmission member 331 to actuate the end effector 100 to perform suturing and/or cutting of the patient tissue when the trigger 341 is operated.

Illustratively, the first switching member 350a is configured to cause the first driving member 343 to abut against the first transmitting member 331 when operated. The first driving part 343 is used for driving the first driving part 331 to drive the end effector 100 to perform suturing and/or cutting actions on patient tissue when the trigger 341 is operated under the condition of abutting against the first driving part 331.

In particular applications, when the first transmission member 331 and the first driving member 343 are disengaged, the driving force of the trigger 341 is only transmitted to the first transmission mechanism 320, but not to the second transmission mechanism 330, and the end effector 100 can only perform the closing operation to clamp the patient tissue under the driving of the trigger 341, but cannot perform the suturing and cutting operation. When the first transmission member 331 and the first driving member 343 are in abutting engagement, the trigger 341 is operated, and the driving force of the trigger 341 is simultaneously transmitted to the first transmission mechanism 320 and the second transmission mechanism 330, so that the end effector 100 can perform the actions of clamping, suturing and cutting the patient tissue under the driving of the trigger 341.

Wherein, the actuating member 360 is configured to press against the first driving member 343 when the end effector 100 is in the open state so as to disengage the first driving member 343 from the first transmission member 331. In this embodiment, the actuating member 360 is pressed against the first driving member 343, so that the first driving member 343 can be separated from the first transmission member 331, and the first switching member 350a releases the force applied to the first driving member 343 by driving the actuating member 360, so that the first driving member 343 can be in transmission connection with the first transmission member 331, i.e. the first switching member 350a indirectly triggers the transmission connection between the trigger mechanism 340 and the second transmission mechanism 330 by driving the actuating member 360. Of course, in a specific application, the first switching member 350a may also directly act on the first transmission member 331 or the first driving member 343 as an alternative embodiment.

Referring to fig. 1, 2, 3, 7 and 8, as an embodiment, the executing part 360 includes a restoring part 361 and a pressing part 362, where the restoring part 361 is connected to the first transmission part 331, and the pressing part 362 is elastically connected to the housing 310 and presses against the restoring part 361, so that the first driving part 343 is disconnected from the first transmission part 331 by the pressing force of the restoring part 361. The first switching member 350a is connected to the pressing member 362, and is used for driving the pressing member 362 to release the pressing force on the reset member 361.

Illustratively, the pressing member 362 is configured to press against the reset member 361 when the end effector 100 is in the open state, such that the reset member 361 presses against the first driving member 343, thereby disengaging the first driving member 343 from the first transmission member 331; the first switching member 350a is configured to drive the pressing member 362 to release the pressing force on the reset member 361 when operated so that the first driving member 343 is in abutting engagement with the first transmission member 331.

Specifically, before the first switching member 350a is triggered, the reset member 361 is pressed against the pawl 3431 by the elastic force of the pressing member 362, so that the pawl 3431 is separated from the rack 3311; when the first switching member 350a is triggered, the first switching member 350a drives the executing member 360 to release the pressing of the pawl 3431, so that the pawl 3431 rotates to a state of abutting against the rack 3311 under the elastic restoring force of the first elastic member 3432, so as to realize the transmission connection between the pawl 3431 and the rack 3311, and when the trigger 341 is operated to rotate, the pawl 3431 can rotate along with the trigger 341 and drive the rack 3311 to linearly move towards the end effector 100, so as to realize the action of driving the end effector 100 to suture and/or cut the patient tissue.

In this embodiment, the second transmission mechanism 330 and the trigger mechanism 340 are connected in a transmission manner by adopting the cooperation of the rack 3311 and the pawl 3431, which is beneficial to converting the rotation power of the trigger 341 into the linear motion power of the first transmission member 331 and to realize the separable connection of the first transmission member 331 and the first driving member 343. Of course, in specific applications, the transmission connection between the second transmission mechanism 330 and the trigger mechanism 340 is not limited thereto, and for example, the rack 3311 and the gear may be used.

Referring to fig. 1, 3, 4, 5, 7 and 8, as an embodiment, the pressing member 362 includes a second elastic member 3622 and a pressing block 3621, the pressing block 3621 is movably installed in the housing 310, and the second elastic member 3622 is elastically connected between the pressing block 3621 and the housing 310. The pressing block 3621 includes a pressing portion 3601, a triggering portion 3602, and a connecting portion 3603, the pressing portion 3601 presses against the reset member 361, the second elastic member 3622 is elastically connected between the connecting portion 3603 and the housing 310, and the triggering portion 3602 abuts against the first switching member 350a for driving the first switching member 350a to move. When the first switching component 350a is operated, the first switching component 350a pushes the trigger portion 3602 to drive the pressing block 3621 to move against the elastic force of the second elastic member 3622, so that the pushing portion 3601 releases the pushing force to the reset component 361, and the pawl 3431 is rotated to a state of being abutted against the rack 3311 under the elastic restoring force of the first elastic member 3432.

As shown in fig. 1, 3, and 8, as an embodiment, the trigger portion 3602 includes a slope 3604 that abuts against the first switching member 350 a. The inclined surface 3604 may be configured such that when the pressing block 3621 forms a wedge-shaped sliding surface, the first switching member 350a acts on the inclined surface 3604 of the trigger portion 3602 to drive the pressing block 3621 to move in a direction to release the reset member 361.

As an embodiment, the first switching member 350a is provided between the portion of the trigger mechanism 340 connected to the housing 310 and the barrel assembly 200 in the length direction of the barrel assembly 200, that is: the first switching member 350a is located on the rear side of the barrel assembly 200 and on the front side of the location where the drive mechanism 340 is coupled to the housing 310.

Referring to fig. 1, 2 and 8, as an embodiment, the first switching member 350a includes a switching control member 351a and a fourth elastic member 352a, wherein the switching control member 351a is mounted on the housing 310 and is in transmission connection with the executing member 360, and both ends of the fourth elastic member 352a are respectively abutted against the switching control member 351 and the housing 310 for driving the switching control member 351a to reset when the operator releases the driving action on the switching control member 351 a.

Illustratively, the switch control member 351a is at least partially exposed from the housing 310 for moving against the actuating member 360 under the driving action of the operator to cause the actuating member 360 to release the force on the first driving member 343; the fourth elastic member 352a is elastically connected between the switching control part 351a and the housing 310. A portion of the switching control member 351a is inserted into the housing 310 and abuts against the pressing block 3621. When the switching control member 351a is operated, the pressing block 3621 may be moved against the elastic force of the fourth elastic member 352 a.

As one embodiment, the switching control member 351a includes a button having a control portion exposed outside the housing 310 and an abutment portion for abutting against the trigger portion 3602, and the fourth elastic member 352a is elastically connected between the button and the housing 310. When the button is pressed, the button pressing block 3621 can be driven to move in the direction of releasing the reset member 361. The fourth elastic member 352 is used to drive the button reset. In this embodiment, the first switching part 350a adopts a button-push type structure, which has a simple structure and is easy to operate. Of course, in a specific application, the arrangement of the first switching component 350a is not limited thereto, and for example, the first switching component 350a may be a knob or a push button or a shift lever as an alternative embodiment.

Referring to fig. 1, 2, 7, 8 and 9, as an embodiment, the reset component 361 includes a reset plate main body 3611 and a first protrusion 3612, the first protrusion 3612 is protruding on a side portion of the reset plate main body 3611 opposite to the first driving component 343, the reset plate main body 3611 is movably connected with the first transmission component 331 and abuts against the first driving component 343, and the abutting portion 3601 abuts against the first protrusion 3612, so as to limit the position of the reset component 361 and release the limit of the reset component 361 under the driving of the first switching component 350 a.

Illustratively, the reset pad body 3611 is configured to press the first driving member 343 under the action of the pressing member 362 so as to disengage the first driving member 343 from the first transmitting member 331. The first driving part, in which the reset pad main body 3611 and the first transmission part 331 are movably connected, specifically means: the reset pad body 3611 is connected with the first transmission member 331, and the reset pad body 3611 is still movable relative to the first transmission member 331 by an external force.

As one embodiment, the abutment 3601 is configured to abut against the first protrusion 3612 when the end effector 100 is in the open state to limit movement of the first protrusion 3612 in the direction of the end effector 100, and is configured to limit movement of the reset blade body 3611 in a direction away from the first drive member 343 when the end effector 100 is in the open state; the first switching part 350a is used to drive the pressing block 3621 to move when operated so that the pressing portion 3601 releases the restriction of the first protrusion 3612 and the reset pad main body 3611.

In this embodiment, the reset pad body 3611 can move relative to the first transmission member 331 in two directions under the action of an external force, one direction being along the length direction of the barrel assembly 200, and the other direction being away from or toward the first driving member 343. Before the first switching part 350a is triggered, the pressing portion 3601 of the pressing block 3621 presses against the first protrusion 3612 and the reset plate main body 3611, where the pressing of the pressing block 3621 against the first protrusion 3612 may limit the reset part 361 to move along the length direction of the barrel assembly 200 toward the direction approaching the barrel assembly 200, and the pressing of the pressing block 3621 against the reset plate main body 3611 may limit the reset part 361 to move away from the first driving part 343.

Referring to fig. 1, 2, 3, 4, 5 and 9, as an embodiment, the executing part 360 further includes a third elastic member 363, where the third elastic member 363 is used to drive the restoring member 361 to move when the pressing portion 3601 releases the limit of the restoring member 361, so as to move the first protrusion 3612 between the pressing portion 3601 and the end effector 100, and move the restoring piece body 3611 to a position releasing the first driving member 343.

Illustratively, when the first switching member 350a is triggered, the first switching member 350a drives the pressing block 3621 to move away from the first driving member 343 against the elastic force of the second elastic member 3622, so that the pressing block 3621 releases the limit of the first protrusion 3612 and the reset plate main body 3611, and the reset member 361 can move under the action of the third elastic member 363.

Referring to fig. 1, 2, 3, 9 and 10, as an embodiment, the handle assembly 300 further includes a first fastener 370, and the reset pad body 3611 is provided with a first coupling hole 3613, and the first fastener 370 is inserted into the first coupling hole 3613 and coupled to the first transmission member 331. The dimension of the first connecting hole 3613 in the first direction is greater than the dimension of the portion, penetrating the first fastener 370, of the first connecting hole 3613 in the first direction, so that the reset component 361 can reciprocate relative to the first fastener 370 in the first direction, and an included angle between the first direction and the length direction of the barrel assembly 200 is greater than 0 ° and less than 90 °.

Illustratively, the first fastener 370 is configured to connect the reset pad body 3611 and the first transmission member 331 in a penetrating manner; wherein the first transmission part 331 is provided with a second connection hole for the first fastener 370 to pass through for connection. The first connecting hole 3613 is provided to connect the reset member 361 and the first fastener 370 and to guide the moving direction of the reset member 361.

As an embodiment, the first connecting hole 3613 is a kidney-shaped hole, which is a kidney-shaped Kong Youchen oblong hole and is formed by enclosing two sections of straight hole walls and two semicircular hole walls. Of course, in a specific application, the shape of the first connection hole 3613 is not limited thereto, and for example, the shape of the first connection hole 3613 may be elliptical or rectangular in alternative embodiments.

Referring to fig. 1, 2, 9 and 10, as an embodiment, the first transmission member 331 is provided with a slide groove 3312, and the reset plate main body 3611 is slidably mounted in the slide groove 3312. The chute 3312 has a first slot wall and a second slot wall disposed opposite to each other with a gap therebetween, and the second connecting hole is disposed on the first slot wall and the second slot wall. The first fastening member 370 sequentially penetrates and connects the first groove wall, the reset plate main body 3611 and the second groove wall.

In one embodiment, the first fastener 370 is a bolt or screw or pin.

Referring to fig. 1, 2, 8, and 9, as an embodiment, the second switching member 350b is connected to the reset member 361 or integrally formed with the reset member 361. The second switching member 350b is provided with a first control portion 351b, where the first control portion 351b is used for being held by an operator to drive the second switching member 350b to drive the reset member 361 and the first transmission member 331 to move in a direction away from the end effector 100, so that the first transmission member 331 drives the firing reset mechanism to perform a motion of recovering to the initial firing position. The action of the firing reset mechanism to the initial position is the reset action of the firing reset mechanism, and can be called as the retracting action. The second switching member 350b is mainly configured to enable the firing reset mechanism and the reset member 361 to be manually reset. In a specific application, when the firing reset mechanism needs to be driven to reset, an operator can pull the second switching component 350b to drive the reset component 361 and the first transmission component 331 to move in a direction away from the end effector 100 by holding the first control portion 351 b.

As an embodiment, the first manipulating portion 351b is a semi-cylinder, and a semi-circular surface of the semi-cylinder faces the side of the end effector 100, which is beneficial to ensuring the comfort of the operator holding the first manipulating portion 351 b. Of course, in a specific application, the shape of the first manipulation portion 351b is not limited thereto, and for example, the shape of the first manipulation portion 351b may be spherical or elliptical or polygonal or irregular in shape as an alternative embodiment.

As one embodiment, the second switching member 350b is detachably coupled to the reset pad body 3611 by a second fastener. The second fastener is a bolt or a screw or a pin.

Referring to fig. 9 and 10, as an embodiment, the second switching member 350b includes a connection rod 352b and two first control portions 351b protruding from both ends of the connection rod 352b, a sliding hole 3313 through which the connection rod 352b passes and slides is provided on the rack 3311, a third connection hole 3614 through which the connection rod 352b passes and connects is provided on the reset plate main body 3611, and the connection rod 352b passes through the connection sliding hole 3313 and the third connection hole 3614.

As an embodiment, the third elastic member 363 is a coil spring, and one end of the third elastic member 363 along the length direction of the barrel assembly 200 is connected to the pull rod, and the other end is connected to the rack 3311.

As an embodiment, the first switching member 350a includes a switching control member 351a and a fourth elastic member 352a, where the switching control member 351a is mounted on the housing 310 and is in driving connection with the executing member 360, and two ends of the fourth elastic member 352a are respectively abutted against the switching control member 351a and the housing 310.

Referring to fig. 1 and 2, as an embodiment, the handle assembly 300 further includes a release mechanism 380, wherein the release mechanism 380 is configured to switch to a locking position to prevent the first transmission mechanism 320 from moving in a direction of opening the first jaw 110 and the second jaw 120 when the first transmission mechanism 320 moves to a preset position during the process of driving the first jaw 110 and the second jaw 120 to close.

The preset position may be a position at which the release mechanism 380 moves to a final position at which the first and second jaws 110 and 120 are closed by the first transmission mechanism 320, a position near the final position, or an intermediate position during the closing process. The movement of the first transmission mechanism 320 in the direction of opening the first jaw 110 and the second jaw 120 is specifically that the first transmission mechanism 320 moves in the direction of releasing the closing force of the first jaw 110 and the second jaw 120 to automatically open the first jaw 110 and the second jaw 120. Suturing and/or cutting of the patient tissue is performed with the first jaw 110 and the second jaw 120 maintained closed. The release mechanism 380 can be used to maintain the first jaw 110 and the second jaw 120 in a closed position, thereby facilitating the firing reset mechanism to facilitate stapling and/or severing of patient tissue.

As an embodiment, the release mechanism 380 is further configured to disengage the locking position when operated, such that the release mechanism 380 releases the restraint on the first actuator 320 to allow movement of the first actuator 320 in a direction to open the first jaw 110 and the second jaw 120. At least a portion of the release mechanism 380 is operatively disposed outside of the housing 310. In this embodiment, the release mechanism 380 is manually operated, although in particular applications, the release mechanism 380 may be configured in an electronically controlled mode as an alternative embodiment.

As an embodiment, the portion of the trigger mechanism 340 connected to the housing 310 is disposed between the barrel assembly 200 and the release mechanism 380 in the length direction of the barrel assembly 200, namely: the location where the trigger mechanism 340 is coupled to the housing 310 is on the rear side of the barrel assembly 200 and on the front side of the release mechanism 380.

Referring to fig. 1, 2 and 4, as one embodiment, the first transmission 320 includes a movable member 321, the movable member 321 being movably coupled to the trigger mechanism 340 and/or the housing 310, and the movable member 321 being coupled to the barrel assembly 200; the movable member 321 is specifically connected to one end of the closure sleeve 210, and can drive the closure sleeve 210 to reciprocate along the length direction of the barrel assembly 200. With the first and second jaws 110, 120 in an open state, depressing the trigger 341 may drive the movable member 321 to push the closure sleeve 210 in a linear motion toward the end effector 100 such that the closure sleeve 210 may drive the first and second jaws 110, 120 to close.

Referring to fig. 1, 2 and 3, as one embodiment, the movable member 321 includes a sliding member 3211 and a rotating member 3212, the sliding member 3211 being slidably coupled to the housing 310 and to the barrel assembly 200. The rotating member 3212 is coupled to the trigger mechanism 340, and the rotating member 3212 is configured to rotate under the drive of the trigger mechanism 340 and to drive the sliding member 3211 to slide toward the end effector 100 to cause the first jaw 110 and the second jaw 120 to perform a closing motion. One end of the sliding member 3211 is connected to one end of the closing sleeve 210, and can drive the closing sleeve 210 to slide reciprocally.

Referring to fig. 1, 2 and 4, as an embodiment, the first transmission mechanism 320 includes a fifth elastic member 322, where the fifth elastic member 322 is elastically connected between the housing 310 and the sliding member 3211 of the first transmission mechanism 320, and is used to drive the sliding member 3211 to slide away from the end effector 100 when the release mechanism 380 releases the limit of the first transmission mechanism 320, so that the first jaw 110 and the second jaw 120 perform an opening action.

Illustratively, the release mechanism 380 is configured to limit the movable member 321 when in the locked position to maintain the first jaw 110 and the second jaw 120 in a closed state; the fifth elastic member 322 is used for driving the movable member 321 to move so as to enable the first jaw 110 and the second jaw 120 to perform an opening action when the release mechanism 380 is disengaged from the locking position to release the limit on the movable member 321. With the first jaw 110 and the second jaw 120 in an open state, pressing the trigger 341 may drive the movable member 321 to push the closure sleeve 210 against the elastic member of the fifth elastic member 322 to move linearly toward the end effector 100, so that the closure sleeve 210 may drive the first jaw 110 and the second jaw 120 to close, and then the release mechanism 380 may lock and limit the movable member 321 to keep the first jaw 110 and the second jaw 120 in a closed state. When the release mechanism 380 is driven by an external force to release from the locking position, the movable member 321 can drive the closing sleeve 210 to move away from the end effector 100 under the elastic restoring force of the fifth elastic member 322, so that the first jaw 110 and the second jaw 120 automatically perform the opening action.

As one embodiment, the release mechanism 380 is configured to limit the rotational member 3212 to maintain the first jaw 110 and the second jaw 120 in a closed state when in the locked position. The fifth elastic element 322 is elastically connected between the sliding member 3211 and the housing 310, and the fifth elastic element 322 is used for driving the sliding member 3211 to slide away from the end effector 100 to enable the first jaw 110 and the second jaw 120 to perform an opening action when the release mechanism 380 is disengaged from the locking position to release the limit of the rotating member 3212.

Referring to fig. 1, 2 and 8, as one embodiment, the release mechanism 380 includes a release member 381 and a sixth elastic member 382, the release member 381 being rotatably coupled to the housing 310; the sixth elastic member 382 is respectively connected to the release member 381 and the housing 310, and the sixth elastic member 382 is configured to drive the release member 381 to rotate to a locking position to limit the first transmission mechanism 320 so as to maintain the first jaw 110 and the second jaw 120 in a closed state when the trigger mechanism 340 drives the first jaw 110 and the second jaw 120 to perform a closing action.

Wherein, the release component 381 can overcome the elastic force of the sixth elastic element 382 to rotate to a position releasing the first transmission mechanism 320 under the action of external force; after the external force is removed, the release member 381 may rotate to the locking position under the elastic restoring force of the sixth elastic member 382 to limit the first transmission mechanism 320.

In this embodiment, the release member 381 is rotatably connected to the housing 310, and the release mechanism 380 is similar to a knob mechanism, however, in specific applications, the movable connection between the release member 381 and the housing 310 is not limited thereto, and the connection between the release member 381 and the housing 310 may be a linear sliding connection in alternative embodiments.

Referring to fig. 1, 2, 7, 8, 13 and 14, as one embodiment, the release member 381 is provided with a detent 3811 for a portion of the first transmission mechanism 320 to snap into place when the first and second jaws 110, 120 are in the closed state. Specifically, when the first jaw 110 and the second jaw 120 are in the closed state, a portion of the rotating member 3212 is clamped in the clamping groove 3811, and the releasing member 381 can limit the rotating member 3212 to rotate, so that the rotating member 3212 is kept in a position against the sliding member 3211. The wall surface of the locking groove 3811 is formed to be a supporting point for abutting against the rotating member 3212.

In one embodiment, the sixth elastic member 382 is a first coil spring, both ends of the first coil spring are respectively abutted against the housing 310 and the release member 381, and the housing 310 and/or the release member 381 are provided with a guide post 3812 for penetrating into the first coil spring to guide and limit the first coil spring. The first coil spring is disposed obliquely with respect to the length direction of the barrel assembly 200, and the first coil spring applies an obliquely upward force to the release member 381. The guide post 3812 may serve as a snap-fit point of the sixth elastic member 382 to serve as a guide when the sixth elastic member 382 is compressed, thereby preventing the first coil spring from being twisted during the expansion and contraction process. In this embodiment, the sixth elastic member 382 employs a coil spring; of course, in a specific application, the arrangement manner of the sixth elastic member 382 is not limited thereto, for example, in an alternative embodiment, the sixth elastic member 382 is a first torsion spring, the first torsion spring is rotatably connected to the housing 310, and two ends of the first torsion spring are respectively abutted against the housing 310 and the release member 381.

Referring to fig. 1, 2, 13 and 14, as an embodiment, the release member 381 is provided with a second control portion 3813, the second control portion 3813 is exposed outside the housing 310, and the second control portion 3813 is used for being held by an operator to drive the release member 381 to move, so that the release member 381 is separated from the locking position, and thus limiting of the first transmission mechanism 320 is released. In this embodiment, the release mechanism 380 is manually operable.

As an embodiment, the second manipulation unit 3813 has a semi-cylindrical shape, so that an operator can conveniently grip the second manipulation unit 3813 for rotation. Of course, in a specific application, the shape of the second control portion 3813 is not limited thereto, and for example, the second control portion 3813 may be polygonal, oblong, elliptical, or other irregular shape.

Referring to fig. 1, 2, 13 and 14, as an embodiment, the release member 381 is rotatably coupled to the housing 310 through a second rotation shaft 383, and a center line of the second rotation shaft 383 is a rotation center line of the release member 381.

Referring to fig. 1 and 2, as one embodiment, the handle assembly 300 further includes a locking mechanism 390, the locking mechanism 390 being configured to switch to a locked position when the first switching member 350a is operated to limit the release mechanism 380 to prevent the release mechanism 380 from being operated out of the locked position. The locking mechanism 390 is mainly used to prevent the release mechanism 380 from being erroneously operated to cause the first jaw 110 and the second jaw 120 to be erroneously opened when the firing reset mechanism is used to staple and/or cut patient tissue, thereby facilitating the improvement of the safety and reliability of the product use.

In one embodiment, the locking mechanism 390 is further configured to drive the release mechanism 380 to move when the actuating member 360 is operated to return the firing reset mechanism to the initial firing position, such that the release mechanism 380 releases the limit on the first transmission mechanism 320, thereby causing the first transmission mechanism 320 to drive the barrel assembly 200 to release the closing driving force on the first and second jaws 110, 120, thereby causing the first and second jaws 110, 120 to perform an opening action. The lock mechanism 390 may be used to limit the release mechanism 380 when the end effector 100 is in the firing process to keep the end effector 100 closed and prevent inadvertent contact of the release mechanism 380; the locking mechanism is further configured to sequentially perform the following actions when the actuator 360 drives the second transmission 330 to move to cause the end effector 100 to perform a retracting action: releasing the limit on the release mechanism 380, driving the release mechanism 380 to move so that the release mechanism 380 releases the limit on the first transmission mechanism 320 and the first transmission mechanism 320 drives the end effector 100 to perform the opening action. In particular applications, when an operator pulls the implement 360 to reset the firing reset mechanism to retract the knife, the implement 360 may actuate the lock mechanism 390 to release the lock on the release mechanism 380.

As one embodiment, the locking mechanism 390 limits the release mechanism 380 from a side of the release mechanism 380 that is remote from the end effector 100 along the length of the barrel assembly 200, i.e., the locking mechanism 390 limits the release mechanism 380 from a rear side of the release mechanism 380.

As an embodiment, the connection portion of the release mechanism 380 and the housing 310 is provided between the first transmission mechanism 320 and the locking mechanism 390 in the length direction of the barrel assembly 200, that is: the location where the release mechanism 380 is connected to the housing 310 is located on the rear side of the first transmission mechanism 320 and on the front side of the locking mechanism 390.

In one embodiment, the location where the release mechanism 380 is connected to the housing 310 is located below and forward of the locking mechanism 390, and this arrangement is advantageous for improving the compactness of the handle assembly 300 while ensuring the functionality of the release mechanism 380 and the locking mechanism 390.

Referring to fig. 1, 2, 4, 5, 11 and 12, as one embodiment, the locking mechanism 390 includes a locking member 391 and a seventh resilient member 392, the locking member 391 being movably coupled to the housing 310, the seventh resilient member 392 being coupled to the locking member 391 and the housing 310, respectively, and the seventh resilient member 392 being configured to drive the locking member 391 to a position of the lock release mechanism 380 when the first switching member 350a is operated and to provide a force of the lock release mechanism 380 to the locking member 391 when the firing reset mechanism performs a stapling and/or cutting patient tissue action.

Among them, the locking part 391 is mainly used for locking the releasing part 381, and the seventh elastic member 392 is mainly used for providing the locking force of the locking releasing part 381 to the locking part 391.

As one embodiment, the locking member 391 is slidably coupled to the housing 310 in a manner that is reciprocally slidable in a second direction that is parallel to the direction of the length of the barrel assembly 200. In this embodiment, the movable connection between the locking member 391 and the housing 310 is a linear sliding connection, which is simple in structure and easy to implement. Of course, in a specific application, the movable connection of the locking member 391 to the housing 310 may also be designed as a swivel connection, as an alternative embodiment.

Referring to fig. 1, 2, 4, 5, 11, and 12, as an embodiment, the lock member 391 includes a slide portion 3911, a first lock portion 3912, a push portion 3913, and a drive portion 3914, the slide portion 3911 is slidably connected to the housing 310, and the seventh elastic member 392 is connected to the slide portion 3911 and the housing 310, respectively; the first locking portion 3912 is disposed at an end of the sliding portion 3911 near the barrel assembly 200, for limiting the release mechanism 380 when the first jaw 110 and the second jaw 120 are in the closed state; the pushing part 3913 is protruding on the top of the sliding part 3911, and is used for the abutment of the executing part 360 to push the locking part 391 to slide in a direction away from the end effector 100 when the executing part 360 drives the second transmission mechanism 330 to move so that the end effector 100 executes a retracting action; the driving part 3914 is disposed at the bottom of the sliding part 3911, and is used for abutting and driving the release mechanism 380 to move when the actuating member 360 drives the second transmission mechanism 330 to move to enable the firing reset mechanism to perform the action of restoring to the initial firing position, so that the release mechanism 380 releases the limit of the first transmission mechanism 320. The end of the reset blade body 3611 remote from the end effector 100 is configured to act on the pushing portion 3913 of the locking member 391 to push the locking member 391 to release the limit on the release member 381 when the reset member 361 drives the firing reset mechanism to reset, thereby achieving the purpose of locking and releasing the release member 381 indirectly through the reset member 361. The sliding portion 3911 is mainly used for realizing sliding connection of the locking member 391 and the housing 310; the first locking portion 3912 is mainly used for realizing locking and limiting of the locking component 391 to the releasing component 381; the pushing part 3913 is mainly used for realizing the function that the locking part 391 can push the reset chip main body 3611 to move; the driving part 3914 is mainly used for enabling the locking member 391 to drive the releasing member 381 to rotate so that the releasing member 381 releases the limit of the rotating member 3212. In a specific application, an operator can drive the release member 381 to release the limit of the first transmission mechanism 320 through manually controlling the second control portion 3813 of the release member 381, or can drive the release member 381 to release the limit of the rotating member 3212 by pushing the locking member 391 when the actuating member 360 is reset.

As shown in fig. 1, 2, 4, 5, 11 and 12, as an embodiment, the driving portion 3914 is rotatably connected to the bottom of the sliding portion 3911, and the driving portion 3914 and the sliding portion 3911 are rotatably connected in the following manner: in a state in which the driving portion 3914 is perpendicular to the sliding direction of the sliding portion 3911, the driving portion 3914 can rotate counterclockwise under the action of an external force, but cannot rotate clockwise under the action of an external force; the release mechanism 380 is provided with a gear 3814, and the gear 3814 is used for abutting against the driving part 3914 to rotate the driving part 3914 so as to enable the driving part 3914 to move to a region between the gear 3814 and the barrel assembly 200 during the process of moving the first jaw 110 and the second jaw 120 from the open state to the closed state; the gear 3814 is further configured to allow the driving portion 3914 to move in abutment to release the limit of the first transmission mechanism 320 by the release mechanism 380 during the first jaw 110 and the second jaw 120 moving from the closed state to the open state. The gear 3814 is specifically protruded on the release member 381. In the present embodiment, the driving part 3914 is designed to rotate only in one direction in a state in which the driving part 3914 is perpendicular to the sliding direction of the sliding part 3911, so that the releasing part 381 can be driven to rotate by the locking part 391 to release the restriction of the rotating part 3212 when the executing part 360 is reset.

Referring to fig. 1, 2, 4, 5, 11 and 12, as an embodiment, the locking part 391 further includes a first rotation shaft and a second torsion spring; the bottom of the sliding part 3911 is convexly provided with two lugs 3915 which are arranged at intervals, the driving part 3914 is rotatably connected with the two lugs 3915 through a first rotating shaft and a second torsion spring, and the second torsion spring is used for providing acting force for the driving part 3914 in a state of keeping the sliding direction perpendicular to the sliding direction of the sliding part 3911; at least one of the lugs 3915 is provided with a first stopper boss 3916, and the first stopper boss 3916 is configured to prevent the driving portion 3914 from rotating clockwise from a state perpendicular to the sliding direction of the sliding portion 3911. The first rotation shaft is mainly used for realizing rotatable connection of the driving part 3914 and the sliding part 3911, and the second torsion spring is mainly used for realizing resetting of the driving part 3914. The first limiting boss 3916 is mainly used for supporting the driving portion 3914 unidirectionally to limit a rotational travel of the driving portion 3914. In the present embodiment, the driving part 3914 has a unidirectional rotation function, and when the locking member 391 moves to the left, the driving part 3914 can rotate counterclockwise to eliminate interference with the gear part 3814 of the releasing member 381, so that the driving part 3914 smoothly enters a specific area of the releasing member 381; when the lock member 391 moves rightward, the driving part 3914 cannot rotate in a vertical state under the urging force of the gear part 3814, so that the gear part 3814 of the release member 381 is rigidly contacted to rotate the release member 381 open to release the restriction of the rotating member 3212.

As shown in fig. 1, 2, 7, 12 and 13, as an embodiment, the release mechanism 380 is provided with a second locking portion 3815 for snap-fit engagement with the first locking portion 3912, one of the first locking portion 3912 and the second locking portion 3815 being a groove, and the other being a projection fitting the groove. When the protrusion is inserted into the groove, the releasing member 381 is prevented from rotating, thereby achieving the purpose of locking the releasing member 381. In the present embodiment, the first locking portion 3912 is a protrusion provided at an end of the locking member 391, and the second locking portion 3815 is a groove provided on the release member 381. Of course, in a specific application, as an alternative embodiment, the first locking portion 3912 may be designed as a groove and the second locking portion 3815 may be designed as a bump.

In one embodiment, the second locking portion 3815 is provided above and forward of the gear portion 3814 in the locked position.

In one embodiment, in the locked position, the second locking portion 3815 is provided at a rear upper side of a portion where the release mechanism 380 is connected to the housing 310, and the shift portion 3814 is provided at a rear lower side of a portion where the release mechanism 380 is connected to the housing 310.

Referring to fig. 1, 2, 4, 5, 11 and 12, as an embodiment, the sliding portion 3911 is provided with a first limiting groove 3901, the housing 310 is provided with a second limiting boss, the seventh elastic element 392 is partially received in the first limiting groove 3901, an end portion of the seventh elastic element 392 near the barrel assembly 200 abuts against a wall surface of the first limiting groove 3901, and an end portion of the seventh elastic element 392 far from the barrel assembly 200 abuts against the second limiting boss. The seventh elastic member 392 is connected between the end wall surface of the first limiting groove 3901 and the second limiting boss along the length direction of the barrel assembly 200. In this embodiment, the first limiting groove 3901 is used to accommodate the seventh elastic element 392, which is beneficial to improving the compactness of the mechanism of the product, and improving the stability of the installation and the reliability of the telescoping action of the seventh elastic element 392.

As an embodiment, the seventh elastic member 392 is a coil spring, which has a simple structure and is easy to install. Of course, in a specific application, the seventh elastic element 392 is not limited thereto, and for example, the seventh elastic element 392 may be a spring sheet as an alternative embodiment.

As an embodiment, the principle of the cooperation of the execution member 360, the release mechanism 380, the lock mechanism 390, the first switching member 350a and the second switching member 350b includes:

1) Without pulling the second switching member 350b, the return member 361 is biased to the leftmost side by the third elastic member 363, and the return member 361 is also at the uppermost position with respect to the rack 3311.

2) When the second switching member 350b is pulled to move away from the end effector 100, the reset member 361 moves to the right lower side with respect to the rack 3311. The right end of the return member 361 acts on the pushing portion 3913 of the lock member 391 while moving to the right.

3) During the firing, the position of the return member 361 relative to the rack 3311 is leftmost and leftmost by the third elastic member 363, and at this time, the right end of the return member 361 does not block the pushing portion 3913 of the lock member 391, and the lock lever member pushes the first locking portion 3912 of the lock member 391 into the second locking portion 3815 of the release member 381 by the seventh elastic member 392, so that the lock member 391 prevents the rotation of the release member 381, thereby enabling the release member 381 to be rapidly locked during the firing of the rack 3311.

4) When the rack 3311 is fired to the bottom, the reset member 361 is pulled back to the near bottom by the second switching member 350b, the reset member 361 is moved rightward against the lock member 391 to a position in contact with the gear portion 3814 of the release member 381, and at this time, the first lock portion 3912 of the lock member 391 is pulled out of the second lock portion 3815 of the release member 381; as the locking member 391 continues to move to the right, the release member 381 will rotate clockwise away from the position against the rotational member 3212 such that the first and second jaws 110, 120 automatically open.

5) When the first switching member 350a is pressed, the lock member 391 starts locking the release member 381. After the first jaw 110 and the second jaw 120 are closed, after the button of the first switching part 350a is pressed, the reset part 361 moves leftwards under the action of the third elastic element 363, the reset part 361 does not abut against the locking part 391, and the locking part 391 moves leftwards under the action of the seventh elastic element 392, so that the locking of the releasing part 381 is realized.

In the embodiment of the present invention, the matching arrangement of the release mechanism 380 and the locking mechanism 390 is a corresponding locking mechanism and release mechanism proposed for realizing the sleeve closing transmission and the rack 3311 firing transmission for the single trigger 341. Wherein, the release part 381 can conveniently prevent the hidden trouble caused by the false touching of the release part 381 to the operation by the locking mechanism of the locking part 391; at the same time, the addition of an operable release mechanism for the release member 381 can facilitate a physician's quick opening of the first and second jaws 110, 120 of the end effector 100.

Referring to fig. 19 and 20, as an embodiment, the trigger 341 includes a trigger body 341c and a link 341d, the trigger body 341c being connected to the link 341d and movable with respect to the link 341d such that the link 341d can drive the first driving part 343 to move when the trigger body 341c is operated; alternatively, the trigger body 341c can drive the first transmission mechanism 320 in a direction to open the end effector 100 as the trigger body 341c moves relative to the linkage 341 d.

Illustratively, there is a first state and a second state between the linkage 341d and the trigger body 341c, where in the first state, the trigger body 341c is capable of rotating counterclockwise and causing a first action to be performed by the end effector 100; in the second state, the trigger body 341c is able to rotate clockwise and carry out a second action by the end effector 100. Wherein the first action includes the end effector 100 performing at least one of clamping, stapling, cutting actions on patient tissue; for example, the end effector 100 may be used to hold pressed patient tissue for one period of time and to staple and cut patient tissue for another period of time. The second action is the end effector 100 performing an opening action.

When the linkage 341d is in the first state, the central axis of the linkage 341d forms a first angle with the extension line of the trigger body 341c in the length direction; when the linkage 341d is in the second state, the central axis of the linkage 341d and the extension line of the trigger body 341c in the length direction form a second included angle, and the first included angle is unequal to the second included angle.

Specifically, when the trigger body 341c rotates counterclockwise and the linkage 341d is in the first state, the trigger body 341c drives the linkage 341d to drive the first driving part 343 to move toward one side of the end effector 100. When the first driving part 343 is disconnected from the second transmission mechanism 330 under the action of the first switching part 350a, the first driving part 343 is in transmission connection with the first transmission mechanism 320 and drives the first transmission mechanism 320 to transmit the driving force for clamping the patient tissue to the end effector 100; when the first driving part 343 is in driving connection with the second transmission mechanism 330 under the action of the first switching part 350a, the first driving part 343 is in driving connection with the second transmission mechanism 330 and drives the second transmission mechanism 330 to transmit driving force for suturing and/or cutting patient tissue to the end effector 100. When the trigger body 341c is rotated clockwise, the trigger body 341c can move relative to the linkage 341d and cause the linkage 341d to transition from the first state to the second state such that the trigger body 341c can drive the first transmission 320 to move in a direction to open the end effector 100 via the linkage 341 d.

In particular applications, when the trigger body 341c is rotated counterclockwise, the trigger body 341c can be used to hold the pressed patient tissue and suture the cut patient tissue in a time-sharing manner. Specifically, when the second transmission mechanism 330 is disengaged from the first driving member 343, the trigger body 341c is operated, and the driving force of the trigger body 341c is only transmitted to the first transmission mechanism 320 via the first driving member 343, but not to the second transmission mechanism 330, and at this time, the end effector 100 can only perform the closing operation to clamp the patient tissue under the driving of the trigger body 341c, but cannot perform the suturing and cutting operation of the patient tissue. After the end effector 100 performs the closing, the closing slide 320a of the first transmission mechanism 320 is located furthest toward the end effector 100 by the first driving part 343, and the first driving part 343 has failed to continue to drive the closing slide 320a toward one side of the end effector 100, i.e., suturing and/or cutting the patient tissue, is performed while the end effector 100 remains closed. At this time, the second transmission mechanism 330 is in transmission connection with the first driving part 343 under the driving of the first switching part 350a, so as to operate the trigger body 341c, and the driving force of the trigger body 341c is transmitted to the second transmission mechanism 330 through the first driving part 343, so as to drive the end effector 100 to perform the suturing and cutting actions on the patient tissue. Alternatively, when the end effector 100 is in the open state, the second transmission mechanism 330 is in transmission connection with the first driving member 343 under the driving of the first switching member 350a, and the first driving member 343 transmits the driving force of the trigger body 341c to both the first transmission mechanism 320 and the second transmission mechanism 330, so that the end effector 100 can perform the actions of clamping, suturing and cutting the patient tissue under the driving of the trigger 341.

When the trigger body 341c rotates clockwise, the resistance that the trigger body 341c can overcome rotates relative to the linkage piece 341d and makes the linkage piece 341d switch from the first state to the second state, that is, the linkage piece 341d switches from the first included angle to the second included angle relative to the trigger body 341c, so that the movement stroke of the trigger body 341c in the casing 310 can be increased, the trigger body 341c is continuously operated to rotate clockwise, and the linkage piece 341d can drive the first transmission mechanism 320 to move towards the direction of opening the end effector 100 under the acting force of the trigger body 341 c.

As an embodiment, the trigger body 341c is provided with a trigger driving portion 3415 and a trigger limiting portion 3414, the second rotating portion 3411 is disposed on the trigger body 341c, the linkage 341d is rotatably connected to the second rotating portion 3411, the trigger limiting portion 3414 is connected to the linkage 341d, for preventing the rotation of the linkage 341d relative to the trigger 341, and the trigger driving portion 3415 is used for driving the first transmission mechanism 320 to move when the trigger body 341c rotates relative to the linkage 341 d.

For example, referring to fig. 19 and 20, the trigger body 341c has a trigger groove, at least a portion of the structure of the link 341d is movably mounted in the trigger groove, the first driving part 343 is mounted on a portion of the structure of the link 341d extending out of the trigger groove, and the trigger driving part 3415 and the trigger limiting part 3414 are two opposite inner sidewalls of the trigger groove. When the trigger body 341c is rotated counterclockwise, the trigger driving part 3415 can drive the linkage 341d to rotate around the second rotating part 3411 and toward one side of the barrel assembly 200. The trigger limiting portion 3414 limits the rotation angle of the linkage 341d in the trigger groove. When the trigger body 341c rotates clockwise, the linkage 341d abuts against the supporting slider 320c of the first transmission mechanism 320, so that the linkage 341d can rotate a preset angle relative to the trigger body 341c and then stop rotating under the action of the trigger limiting portion 3414, so that the trigger body 341c can drive the linkage 341d to move towards one side of the supporting slider 320c through the trigger limiting portion 3414, and further drive the supporting slider 320c to drive the first transmission mechanism 320 to move in a direction of opening the end effector 100.

As an embodiment, a limiting elastic member 3413 is connected between the trigger body 341c and the linkage 341d, and the limiting elastic member 3413 is used for preventing the linkage 341d from rotating relative to the trigger body 341c, so that the trigger body 341c can stably transmit the driving force to the linkage 341d. Meanwhile, when the trigger body 341c rotates clockwise, the resistance generated by the limiting elastic member 3413 needs to be overcome, so that the trigger limiting portion 3414 can drive the linkage 341d to move toward one side of the supporting slider 320 c. In addition, the trigger body 341c and the linkage 341d may be fixed by an interference fit, which is not limited by the present application.

As an embodiment, referring to fig. 17 and 18, the trigger 341 includes a first trigger 341a and a second trigger 341b capable of being engaged with the first trigger 341a, where the first trigger 341a is in driving connection with the first driving part 343, and the second trigger 341b is capable of driving the first transmission mechanism 320 to move in a direction of opening the end effector 100 during the closing operation of the end effector 100.

Illustratively, because the first trigger 341a is drivingly coupled to the first drive member 343, the first drive member 343 is drivingly coupled to the first transmission 320 and/or the second transmission 330 such that the first drive member 343 is capable of simultaneously transmitting the driving force of the first trigger 341a to the first transmission 320 and the second transmission 330 for the end effector 100 to perform clamping, stapling, and severing of tissue. Meanwhile, since the second trigger 341b can be separated from the first trigger 341a, the second trigger 341b can be moved in a direction to open the end effector 100 by driving the first transmission mechanism 320 during the closing motion of the end effector 100.

In particular applications, when the end effector 100 is required to clamp and squeeze tissue and to staple and cut tissue, the second trigger 341b may be snapped together with the first trigger 341a to form a trigger structure, and then the second trigger 341b and the first trigger 341a may be simultaneously actuated such that the trigger structure can be moved toward one side of the end effector 100 by the first trigger 341a driving the first driving member 343. When the second transmission mechanism 330 is disengaged from the first driving part 343, the driving force of the trigger structure is transmitted to the first transmission mechanism 320 only through the first driving part 343, but not to the second transmission mechanism 330, and the end effector 100 can only perform the closing operation to clamp the patient tissue under the driving of the trigger structure, but cannot perform the suturing and cutting operation of the patient tissue. After the end effector 100 performs the closing, the closing slide 320a of the first transmission mechanism 320 is located at the most distal end of the first driving part 343 toward the end effector 100, and the first driving part 343 has failed to continue to drive the closing slide 320a toward one side of the end effector 100, i.e., suturing and/or cutting the patient tissue, is performed while the end effector 100 remains closed. At this time, the second transmission mechanism 330 is in transmission connection with the first driving part 343 under the driving of the first switching part 350a, and operates the trigger structure, and the driving force of the trigger structure is transmitted to the second transmission mechanism 330 through the first driving part 343, so as to drive the end effector 100 to perform the suturing and cutting actions of the patient tissue. Alternatively, when the end effector 100 is in the open state, the second transmission mechanism 330 is in transmission connection with the first driving member 343 under the driving of the first switching member 350a, and the first driving member 343 transmits the driving force of the trigger structure to both the first transmission mechanism 320 and the second transmission mechanism 330, so that the end effector 100 can perform the actions of clamping, suturing and cutting the patient tissue under the driving of the trigger 341.

When the end effector 100 is jammed during the closing operation or the end effector 100 needs to be opened, the second trigger 341b is separated from the first trigger 341a and the second trigger 341b applies a force to the support slider 320c, so that the support slider 320c can drive the first transmission mechanism 320 to move in the direction of opening the end effector 100.

As an embodiment, referring to fig. 21 and 22, the trigger 341 includes a trigger body 341c and a pressed portion 341e extending from one end of the trigger body 341c and bent at a preset angle, so that the trigger body 341c can generate a rotational stroke with respect to the housing 310 when operated, for driving the end effector 100 to perform clamping, stapling, and cutting actions of a patient tissue.

Illustratively, the rotational travel includes a first rotational travel and a second rotational travel, upon rotation of the trigger body 341c by the first rotational travel, the trigger body 341c transmits a driving force to the pressed portion 341e such that the pressed portion 341e can drive the first transmission mechanism 320 to control the end effector 100 to perform a clamping action; when the trigger body 341c rotates by the second rotation stroke, the trigger body 341c transmits a driving force to the pressure receiving portion 341e, so that the pressure receiving portion 341e can drive the second transmission mechanism 330 to control the end effector 100 to perform the suturing and/or cutting actions of the patient tissue.

Specifically, the first driving part 343 is mounted on the pressure receiving part 341e, the pressure receiving part 341e has a first driving end facing the end effector 100 and a second driving end facing away from the end effector 100, and when the trigger body 341c rotates for a first rotation stroke, at least one of the first driving part 343 and the first driving end is in driving connection with the first transmission mechanism 320, so as to drive the first transmission mechanism 320 to move towards the end effector (100), and at the same time, the supporting slider 320c of the first transmission mechanism 320 moves towards the end effector 100, so that a second rotation stroke exists between the trigger body 341c and the housing 310; after the end effector (100) is closed, when the trigger body 341c rotates in the second rotation stroke, the pressure receiving portion 341e can drive the second transmission mechanism 330 to control the end effector 100 to perform the suturing and/or cutting actions on the patient tissue. In addition, when the end effector 100 is jammed during the closing operation or the end effector 100 needs to be opened, the trigger body 341c is reversely rotated in the first rotation stroke, so that the second driving end can drive the supporting slider 320c to drive the first transmission mechanism 320 to move toward the direction of opening the end effector 100.

In a specific application, referring to fig. 21 and 22, the trigger body 341c has a first angle α when the end effector 100 is in the open state and a second angle β when the end effector 100 is in the closed state, where the first rotational stroke is a rotational stroke of the trigger body 341c between the first angle α and the second angle β, and the second rotational stroke is a rotational stroke of the trigger body 341c within the second angle β. For example, the first included angle α is 60 °, the second included angle β is 40 °, the first rotational travel is a rotational angle of the trigger body 341c relative to the housing 310 between 40 ° and 60 °, and the second rotational travel may be any range of rotational angles of the trigger body 341c relative to the housing 310 between 0 ° and 40 ° (in some embodiments, the rotational angle is 40 ° to 50 °).

As an embodiment, referring to fig. 17 and 22, the first transmission mechanism 320 includes a connection bracket 320b and a closing slider 320a that can be in transmission connection with the first driving part 343. Wherein, the connecting bracket 320b is slidably connected to the housing 310, and the closing slide 320a is connected to the barrel assembly 200 and the connecting bracket 320b, so that the trigger 341 can drive the closing slide 320a through the first driving part 343 to transmit the driving force for clamping the patient tissue to the end effector 100 through the barrel assembly 200; and also moves the coupling holder 320b so that the driving force for opening the end effector 100 can be transmitted through the coupling holder 320b or the supporting slider 320c on the coupling holder 320b when the trigger 341 is reversely rotated.

As an embodiment, the first transmission mechanism 320 further includes a support slider 320c capable of being in transmission connection with the trigger 341, and the support slider 320c is disposed at a side of the connection bracket 320b away from the closing slider 320a, such that the trigger 341 can drive the first transmission mechanism 320 to move in a direction of opening the end effector 100 through the support slider 320 c.

It should be noted that, the supporting slider 320c may be mounted on the connecting bracket 320b in an assembling manner, and the supporting slider 320c may be integrally formed with the connecting bracket 320b, which is not limited by the present application.

As one embodiment, the first transmission part 331 includes a rack 3311, and the first driving part 343 includes a pawl 3431 and a first elastic member 3432. Wherein, rack 3311 is slidingly connected to housing 310, pawl 3431 is rotatably connected to trigger 341, and both ends of first elastic member 3432 are respectively abutted against pawl 3431 and trigger 341 for driving pawl 3431 to abut against rack 3311 when the force applied to first driving member 343 is released.

As an embodiment, referring to fig. 17 and 22, the switching mechanism 350 includes a switching control member 351a, where the switching control member 351a is elastically connected to the housing 310 and presses against the first driving member 343 or the second transmission mechanism 330, and the switching control member 351a is used to release the pressing against the second transmission mechanism 330, so that the first driving member 343 can be in transmission connection with the second transmission mechanism 330.

Illustratively, the switch manipulating member 351a is pressed against the first driving member 343 to enable the first driving member 343 to disengage from the first transmitting member 331; when the switching control part 351a releases the force on the first driving part 343, the first driving part 343 is in driving connection with the first transmission part 331, so that the first transmission part 331 can be driven to move by the first driving part 343.

Or, the switching control part 351a is pressed against the first transmission part 331, and is used for driving the transmission connection between the first transmission part 331 and the first driving part 343, so that the first driving part 343 can drive the first transmission part 331 to move; and when the switching manipulation member 351a releases the force on the first transmission member 331, the first transmission member 331 is disengaged from the first driving member 341 by the elastic force or other force.

As an embodiment, referring to fig. 17 and 18, a switch chute 312 is provided on the housing 310, and a switch control member 351a is movably mounted in the switch chute 312 and can slide from one end of the switch chute 312 to the other end of the switch chute 312, for releasing the pressing of the first driving member 343 or the pressing of the first driving member 343 against the second transmission mechanism 330, so that the first driving member 343 can be in transmission connection with the second transmission mechanism 330.

In the present embodiment, the switching chute 312 has a releasing portion and a locking portion, the releasing portion and the locking portion are disposed at opposite ends of the switching chute 312, and when the switching control member 351 is at the locking portion, the switching control member 351a releases the pressing force to the first driving member 343 or the pressing force to the second transmission mechanism 330, so that the first driving member 343 can be in transmission connection with the second transmission mechanism 330; when the switching control member 351a is in the release portion, the pressing member 362 presses against the first driving member 343 or releases the pressing against the second transmission mechanism 330, so that the first driving member 343 can be separated from the first driving member 341 under the force of the switching control member 351a or the first transmission member 331 can be separated from the first driving member 341 under the elastic force or other force.

As one embodiment, the surgical instrument is used in laparoscopic surgery, and is primarily used for hemostasis and resection of soft tissue of a patient. In laparoscopic surgery, a clinician is required to use the jaw closing function of the surgical instrument to sufficiently and effectively squeeze the patient tissue, so that the thickness of the clamped patient tissue is uniform, and the effects of suturing and cutting the patient tissue are improved. Therefore, the closing performance and the operating characteristics of the surgical instrument jaws are considered as important indicators for evaluating the performance of the surgical instrument. The present embodiment provides a proposed firing scheme for closing the jaws and rack 3311 using a single trigger 341 to close the sleeve 210, ensuring superior performance of the surgical instrument for expression of patient tissue and ease and stability of operation with a simpler construction.

As one embodiment, the surgical instrument is a endoscopic linear stapler capable of realizing closing transmission and firing transmission of a closing sleeve 210 by a single trigger 341, and the working principle of the endoscopic linear stapler comprises:

(1) The trigger 341 rotates counterclockwise through an angle (in some embodiments, a rotation angle of 40 ° -50 °) about its central axis of rotation where it connects with the housing 310 as the first jaw 110 and the second jaw 120 are opened to closed; during rotation, the boss 3412 of the trigger 341 contacts the closed end 3203 of the arcuate slot 3202 of the rotating member 3212 and urges the rotating member 3212 to rotate counterclockwise about its central axis of rotation with the trigger 341; the second projection 3206 pushes the sliding member 3211 to compress the fifth elastic member 322 to move leftward (toward the end effector 100 in the drawing) along the length direction of the barrel assembly 200 when the rotating member 3212 rotates; sliding member 3211 pushes closure sleeve 210 in a linear motion toward end effector 100, thereby closing first jaw 110 and second jaw 120. During the process of driving the first jaw 110 and the second jaw 120 closed, the fifth elastic member 322 is compressed, and the compression stroke is a distance that the sliding member 3211 moves linearly toward the end effector 100. When first jaw 110 and second jaw 120 are moved to the closed end position, rotating member 3212 is rotated to the limit position by actuation of posts 3412 of trigger 341, at which time second projection 3206 abuts sliding member 3211, the rightmost portion of rotating member 3212 (i.e., the portion furthest from end effector 100 at this time) contacts the leftmost portion of release member 381, and release member 381 retains sliding member 3211 in the position to close first jaw 110 to second jaw 120 by abutting rotating member 3212. The lower left end of the release member 381 is held against and restrained by the housing 310 by the sixth elastic member 382 such that the left support point of the release member 381 for the rotating member 3212 is in a horizontal axis position.

(2) The single trigger 341 is adopted to realize two functions of jaw closing and rack 3311 firing, and separate operation of a jaw closing transmission chain and a rack 3311 firing transmission chain needs to be ensured. Thus, this embodiment employs a movable reset tab (i.e., reset element 361) in the middle of the rack 3311 to separate the two states in time. When the trigger 341 is applied only to the jaw closure drive chain (i.e., the first drive mechanism 320), the return member 361 depresses the pawl 3431 to prevent it from engaging the rack 3311. Specifically, in the process that the trigger 341 drives the rotating member 3212 to push the sliding member 3211 to close the first jaw 110 and the second jaw 120, the pawl 3431 at the top end of the trigger 341 is not contacted with the rack 3311 under the pressing action of the reset plate main body 3611, so that the trigger 341 does not push the rack 3311 and the firing bar 220 for firing to move towards the end effector 100 in the process that the first jaw 110 and the second jaw 120 are closed; thereby blocking the firing function of the trigger 341. When the first jaw 110 is closed with the second jaw 120 and is held by the release member 381, the pressing block 3621 is moved upward a small distance by pressing the first switching member 350a, releasing the return member 361, the return member 361 is moved upward to the left by the third elastic member 363, at which time the pawl 3431 is again engaged with the rack 3311, and when the trigger 341 is again fired, the rack 3311 is moved to the left by the pawl 3431, thereby pushing the firing bar 220 to fire toward the end effector 100.

(3) The engagement and blocking of pawl 3431 with rack 3311 by return member 361 is accomplished by displacement of compact 3621 along housing 310. The side surface of the pressing block 3621 has a wedge-shaped sliding surface (i.e., the inclined surface 3604), and when the switching control part 351 is pressed downward, the wedge-shaped sliding surface of the pressing block 3621 is displaced upward due to the action of the switching control part 351, so that the pressing block 3621 is separated from the blocking action on the reset part 361, and the reset part 361 moves upward and leftward under the action of the third elastic piece 363, and the rack 3311 is meshed with the pawl 3431.

(4) The reset component 361 is connected with the rack 3311 in the following way: the reset part 361 is connected with the first fastening piece 370 through the first connecting hole 3613 which is obliquely arranged and takes the shape of an oblong hole, so that the reset part 361 can have a left-right and up-down movement space relative to the rack 3311. The contact of the first protrusion 3612 on the return member 361 with the pressure block 3621 can limit the movement position of the return member 361 relative to the rack 3311, and when the first protrusion 3612 contacts the pressure block 3621, the return member 361 is in a depressed position relative to the rack 3311.

(5) The operable release mechanism of the release member 381 is: when the release member 381 is rotated, the sixth elastic member 382 is compressed, and the release member 381 rotates about its central axis connected to the housing 310, so that the leftmost supporting point of the release member 381 deviates from the horizontal axis position and cannot abut against the rotating member 3212; the sliding member 3211 moves rightward by the restoring force of the fifth elastic element 322, pushes the rotating member 3212 to rotate clockwise, and opens the first jaw 110 and the second jaw 120.

(6) The locking mechanism of the release member 381 is: during the firing of the rack 3311, the protrusion of the end of the lock member 391 (i.e., the first lock portion 3912) is inserted into the recess of the release member 381 (i.e., the second lock portion 3815), so as to prevent the release member 381 from being erroneously touched during the firing.

(7) The release mechanism of the release part 381 in the retracting process of the firing reset mechanism is as follows: the executing component 360 may be used to drive the first transmission component 331 to move under the action of external force, so that the first transmission component 331 drives the end effector 100 to execute the retracting motion. When the actuating member 360 pulls the rack 3311 to move away from the end effector 100 for retracting, the driving portion 3914 of the locking member 391 may abut against the gear portion 3814 of the releasing member 381 to drive the releasing member 381 to rotate away from the position abutting against the rotating member 3212, thereby automatically opening the first and second jaws 110 and 120.

The embodiment of the invention adopts the single trigger 341 to realize the closing of the closing sleeve 210 of the surgical instrument jaw and the firing transmission of the rack 3311, thereby simplifying the operation flow of the manual surgical instrument in operation and facilitating the use of a clinician; not only solves the problems of complex transmission system and difficult doctor operation caused by adopting double-trigger 341 closure in the related art; but also overcomes the defect that the closing force is small and the pressing of thick patient tissues is not thorough due to the closing and firing of the single trigger 341 in the related art. In addition, the locking and release mechanism of the release member 381 provided by embodiments of the present invention ensures the safety and ease of use of the surgical instrument by the surgeon.

The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.

Claims

1. A surgical instrument, characterized by: comprises an end effector (100), a barrel assembly (200) and a handle assembly (300), wherein the barrel assembly (200) is connected between the end effector (100) and the handle assembly (300), and the barrel assembly (200) is used for transmitting the driving force of the handle assembly (300) to the end effector (100) so as to provide a first driving force and a second driving force for the end effector (100);

wherein the handle assembly (300) comprises a housing (310), a first transmission mechanism (320), a second transmission mechanism (330), a trigger mechanism (340) and a switching mechanism (350) having a first state and a second state, the first transmission mechanism (320) and the second transmission mechanism (330) are housed within the housing (310), the trigger mechanism (340) is in driving connection with the first transmission mechanism (320) when the switching mechanism (350) is in the first state, and the first transmission mechanism (320) is in driving connection with the barrel assembly (200), the trigger mechanism (340) is in driving connection with the second transmission mechanism (330) when the switching mechanism (350) is in the second state, and the second transmission mechanism (330) is in driving connection with the barrel assembly (200), and the barrel assembly (200) is in driving connection with the end effector (100);

When the switching mechanism (350) is in the first state, the trigger mechanism (340) transmits a first driving force to the end effector (100) through the first transmission mechanism (320) and the barrel assembly (200); when the switching mechanism (350) is in the second state, the trigger mechanism (340) transmits a second driving force to the end effector (100) through the second transmission mechanism (330) and the barrel assembly (200).

2. The surgical instrument of claim 1, wherein the end effector (100) comprises a first jaw (110) and a second jaw (120), the first driving force being a force that drives the first jaw (110) and the second jaw (120) closed, the second driving force being a force that drives the end effector (100) to staple and/or cut patient tissue.

3. The surgical instrument of claim 2, wherein the barrel assembly (200) comprises a closure sleeve (210) and a firing bar (220), the closure sleeve (210) being coupled between the first transmission (320) and the end effector (100), the firing bar (220) being coupled between the second transmission (330) and the end effector (100); the closure sleeve (210) is used for driving the first jaw (110) and the second jaw (120) to be closed under the action of the first driving force, and the firing bar (220) is used for driving the end effector (100) to suture and/or cut patient tissues under the action of the second driving force.

4. A surgical instrument according to claim 3, wherein the first transmission mechanism (320) comprises a sliding member (3211) and a rotating member (3212), the sliding member (3211) being in driving connection with the closure sleeve (210) at a distal end, the trigger mechanism (340) being in driving connection with the sliding member (3211) at a proximal end via the rotating member (3212); the sliding member (3211) is disposed between the barrel assembly (200) and the rotating member (3212) and is movable along a length direction of the barrel assembly (200).

5. A surgical instrument as recited in claim 4, wherein: the rotating component (3212) is provided with a first rotating part (3201) and an arc-shaped groove (3202) positioned on the outer side of the first rotating part (3201), the trigger mechanism (340) is provided with a second rotating part (3411) and a convex column (3412), the first rotating part (3201) is rotationally connected with the second rotating part (3411), the convex column (3412) penetrates through the arc-shaped groove (3202) and can slide back and forth in the arc-shaped groove (3202) to be used for driving the rotating component (3212) to rotate so as to drive the sliding component (3211) and the closing sleeve (210) to move from the proximal end to the distal end to drive the first jaw (110) and the second jaw (120) to be closed.

6. A surgical instrument as recited in claim 5, wherein: the rotating component (3212) is further provided with a second protrusion (3206) and an arc-shaped outer wall surface (3205) located outside the arc-shaped groove (3202), and the second protrusion (3206) is arranged on the arc-shaped outer wall surface (3205) in a protruding mode and used for pressing the sliding component (3211) when the end effector (100) performs a closing action so as to drive the sliding component (3211) to move towards the end effector (100).

7. The surgical instrument of claim 1, wherein the trigger mechanism (340) comprises a trigger (341), a first driving member (343), and a resilient return member (342) for returning the trigger (341), the trigger (341) being rotatably connected to the housing (310), both ends of the resilient return member (342) being respectively abutted against the trigger (341) and the housing (310);

the first transmission mechanism (320) and the first driving part (343) are respectively in transmission connection with the trigger (341), the switching mechanism (350) enables the first driving part (343) to be separated from transmission connection with the second transmission mechanism (330) in the first state, and enables the first driving part (343) to be in transmission connection with the second transmission mechanism (330) in the second state.

8. The surgical instrument of claim 7, wherein the second transmission mechanism (330) comprises a first transmission member (331), the first transmission member (331) being in driving connection with the barrel assembly (200);

the first driving member (343) abuts against the first transmission member (331) when the switching mechanism (350) is switched from the first state to the second state, and drives the first transmission member (331) to transmit the second driving force to the end effector (100) when the trigger (341) is operated.

9. The surgical instrument of claim 8, wherein the first transmission member (331) comprises a rack (3311), and the first drive member (343) comprises a pawl (3431) and a first resilient member (3432);

the rack (3311) is slidably connected in the housing (310), the pawl (3431) is rotatably connected to the trigger (341), and two ends of the first elastic member (3432) are respectively abutted to the pawl (3431) and the trigger (341) and used for driving the pawl (3431) to be abutted to the rack (3311) when the switching mechanism (350) is switched from the first state to the second state.

10. The surgical instrument of claim 8, wherein the switching mechanism (350) comprises an actuating member (360), the actuating member (360) drivingly connecting the trigger mechanism (340) with the second drive mechanism (330) when the end effector (100) is in a closed state; the actuating member (360) decouples the trigger mechanism (340) from the second transmission mechanism (330) when the end effector (100) is in the open state.

11. The surgical instrument of claim 10, wherein the switching mechanism (350) comprises a first switching member (350 a) and a second switching member (350 b), the first switching member (350 a) driving the actuation member (360) in driving connection with the trigger mechanism (340) and the second transmission mechanism (330); the actuating part (360) is used for disconnecting the trigger mechanism (340) from the second transmission mechanism (330) under the action of the second switching part (350 b).

12. The surgical instrument of claim 11, wherein the actuating member (360) comprises a return member (361) and a pressing member (362), the return member (361) being coupled to the first transmission member (331), the pressing member (362) being resiliently coupled within the housing (310) and pressing against the return member (361) to disengage the first drive member (343) from the transmission connection with the first transmission member (331) under the pressing of the return member (361);

the first switching component (350 a) is connected with the pressing component (362) and is used for driving the pressing component (362) to release the pressing of the reset component (361).

13. The surgical instrument of claim 12, wherein the pressing member (362) includes a second elastic member (3622) and a pressing block (3621) movably mounted in the housing (310), the pressing block (3621) includes a pressing portion (3601), a trigger portion (3602), and a connecting portion (3603), the pressing portion (3601) presses against the return member (361), the second elastic member (3622) is elastically connected between the connecting portion (3603) and the housing (310), and the trigger portion (3602) abuts against the first switching member (350 a) so that the first switching member (350 a) drives the pressing block (3621) to move.

14. The surgical instrument of claim 11, wherein the second switching member (350 b) is connected to or integrally formed with the reset member (361); the second switching component (350 b) is provided with a first control part (351 b), and the first control part (351 b) is used for being held by an operator to drive the second switching component (350 b) to drive the reset component (361) and the first transmission component (331) to move in a direction away from the end effector (100).

15. A surgical instrument according to any one of claims 11 to 14, wherein the first switching member (350 a) includes a switching control member (351 a) and a fourth elastic member (352 a), the switching control member (351 a) being mounted on the housing (310) and being in driving connection with the actuating member (360), both ends of the fourth elastic member (352 a) being respectively abutted on the switching control member (351 a) and the housing (310).

16. A surgical instrument according to claim 3, wherein the end effector (100) further comprises an eighth resilient member for driving the end effector (100) to perform an opening action when the closure sleeve (210) releases a closure force on the end effector (100).

17. A surgical instrument as recited in claim 1, wherein: the handle assembly (300) comprises a release mechanism (380), the first jaw (110) and the second jaw (120) are used for clamping patient tissues when the first jaw (110) and the second jaw (120) are closed, and the release mechanism (380) is used for limiting the first transmission mechanism (320) to move towards the direction of opening the first jaw (110) and the second jaw (120) when the first transmission mechanism (320) drives the first jaw (110) and the second jaw (120) to move to a preset position in the closing process.

18. A surgical instrument as recited in claim 17, wherein: the handle assembly (300) further includes a locking mechanism (390) for switching to a locked position to limit the release mechanism (380) when the switching mechanism (350) is operated, thereby preventing the release mechanism (380) from being operated out of the locked position.

19. A surgical instrument as recited in claim 1, wherein: the trigger mechanism (340) comprises a first driving part (343) and a trigger (341) rotatably connected in the shell (310), the trigger (341) is in transmission connection with the first transmission mechanism (320) and/or the second transmission mechanism (330) through the first driving part (343), the switching mechanism (350) enables the first driving part (343) to be in transmission connection with the second transmission mechanism (330) in the first state, and enables the first driving part (343) to be in transmission connection with the second transmission mechanism (330) in the second state.

20. A surgical instrument as recited in claim 19, wherein: the trigger (341) comprises a first trigger (341 a) and a second trigger (341 b) which can be buckled with the first trigger (341 a), the first trigger (341 a) is in transmission connection with the first driving component (343), and the second trigger (341 b) can drive the first transmission mechanism (320) to move towards the direction of opening the end effector (100) in the process of closing the end effector (100).

21. A surgical instrument as recited in claim 19, wherein: the trigger (341) comprises a trigger body (341 c) and a linkage (341 d), the trigger body (341 c) being connected to the linkage (341 d) and being movable relative to the linkage (341 d) such that the linkage (341 d) is capable of driving the first driving part (343) to move when the trigger body (341 c) is operated; or when the trigger body (341 c) moves relative to the linkage (341 d), the trigger body (341 c) can drive the first transmission mechanism (320) to move towards the direction of opening the end effector (100).

22. A surgical instrument as recited in claim 21, wherein: the trigger comprises a trigger body (341 c), and is characterized in that a trigger driving part (3415), a trigger limiting part (3414) and a second rotating part (3411) are arranged on the trigger body (341 c), the linkage piece (341 d) is rotationally connected to the second rotating part (3411), the trigger limiting part (3414) is connected with the linkage piece (341 d) and is used for preventing the linkage piece (341 d) from rotating relative to the trigger (341), and the trigger driving part (3415) is used for driving the first transmission mechanism (320) to move when the trigger body (341 c) rotates relative to the linkage piece (341 d).

23. A surgical instrument as recited in claim 19, wherein: the trigger (341) includes a trigger body (341 c) and a pressed portion (341 e) extending from one end of the trigger body (341 c) and bent at a preset angle, so that the trigger body (341 c) can generate a rotational stroke relative to the housing (310) when operated, the rotational stroke including a first rotational stroke and a second rotational stroke;

when the trigger body (341 c) rotates by the first rotating stroke, the pressure receiving part (341 e) drives the first transmission mechanism (320) to control the end effector (100) to perform the action of clamping the patient tissue; when the trigger body (341 c) rotates for the second rotation stroke, the pressure receiving part (341 e) drives the second transmission mechanism (330) to control the end effector (100) to perform suturing and/or cutting actions on patient tissues; and the trigger body (341 c) is further configured to drive the first transmission mechanism (320) to move in a direction of opening the end effector (100).

24. A surgical instrument as recited in any one of claims 19-23, wherein: the first transmission mechanism (320) comprises a connecting bracket (320 b) and a closing slide block (320 a) which can be in transmission connection with the first driving part (343), the connecting bracket (320 b) is connected to the shell (310) in a sliding manner, and the closing slide block (320 a) is in transmission connection with the gun barrel assembly (200) and the connecting bracket (320 b).

25. A surgical instrument as recited in claim 24, wherein: the first transmission mechanism (320) further comprises a supporting slide block (320 c) which can be in transmission connection with the trigger (341), and the supporting slide block (320 c) is arranged on one side, far away from the closing slide block (320 a), of the connecting bracket (320 b), so that the trigger (341) can drive the first transmission mechanism (320) to move towards the direction of opening the end effector (100) through the supporting slide block (320 c).

26. A surgical instrument as recited in any one of claims 19-23, wherein: the first transmission part (331) comprises a rack (3311), and the first driving part (343) comprises a pawl (3431) and a first elastic member (3432);

the rack (3311) is slidably connected to the housing (310), the pawl (3431) is rotatably connected to the trigger (341), and two ends of the first elastic member (3432) are respectively abutted to the pawl (3431) and the trigger (341) for driving the pawl (3431) to be abutted to the rack (3311) when the switching mechanism (350) is operated.

27. A surgical instrument as recited in any one of claims 19-23, wherein: the switching mechanism (350) comprises a switching control component (351 a), and the switching control component (351 a) is elastically connected to the shell (310) and is pressed against the first driving component (343) or the second transmission mechanism (330); or,

The switching mechanism (350) comprises a switching control component (351 a), a switching chute (312) is arranged in the shell (310), the switching chute is provided with a release part and a locking part, and the switching control component (351) is movably arranged in the switching chute (312).