CN114569176B

CN114569176B - Anastomat

Info

Publication number: CN114569176B
Application number: CN202011381352.8A
Authority: CN
Inventors: 杜运峰
Original assignee: Suzhou IntoCare Medical Technology Co Ltd
Current assignee: Suzhou IntoCare Medical Technology Co Ltd
Priority date: 2020-11-30
Filing date: 2020-11-30
Publication date: 2023-10-10
Anticipated expiration: 2040-11-30
Also published as: CN114569176A

Abstract

A stapler includes an end effector, a closure mechanism, a staple pusher assembly, and a locking mechanism. The end effector comprises a nail bin assembly and a nail anvil, wherein the nail bin assembly is provided with a anastomotic nail; in an initial state, the end effector is in an open state; in a closing phase, the closing mechanism is configured to drive the cartridge assembly and the anvil into apposition to close the end effector to clamp a target tissue; a staple pushing stage subsequent to the closing stage, the staple pushing assembly configured to push the staples out of the cartridge assembly to staple the target tissue; the locking mechanism is configured to define the closing mechanism in a first position to maintain the closing mechanism in a closed state of the end effector during the stapling stage and to define the closing mechanism in a second position to maintain the end effector in the open state in the initial state.

Description

Anastomat

Technical Field

At least one embodiment of the present disclosure relates to a stapler.

Background

In surgical treatment, various kinds of anastomat are widely used, for example, skin anastomat, digestive tract (esophagus, stomach intestine, etc.) circular anastomat, rectum anastomat, circular hemorrhoid anastomat, circumcision anastomat, blood vessel anastomat, hernia anastomat, lung cutting stapler, etc. The anastomat is used in medicine to replace traditional manual suturing equipment, and various anastomat used clinically at present has the advantages of quick and accurate suturing, simple and convenient operation, small bleeding amount, few side effects and operation complications and the like due to the development of modern technology and the improvement of manufacturing technology, and sometimes causes the tumor operation which cannot be resected to be resected by focus, so the anastomat is favored and appreciated by clinicians at home and abroad.

Typically, staplers are sutured using staples made of a material such as medical stainless steel, titanium alloy, biodegradable magnesium alloy, or the like.

Disclosure of Invention

At least one embodiment of the present disclosure provides a stapler including an end effector, a closure mechanism, a staple pusher assembly, and a locking mechanism. The end effector comprises a nail bin assembly and a nail anvil, wherein the nail bin assembly is provided with a anastomotic nail; in an initial state, the end effector is in an open state; in a closing phase, the closing mechanism is configured to drive the cartridge assembly and the anvil into apposition to close the end effector to clamp a target tissue; a staple pushing stage subsequent to the closing stage, the staple pushing assembly configured to push the staples out of the cartridge assembly to staple the target tissue; the locking mechanism is configured to define the closing mechanism in a first position to maintain the closing mechanism in a closed state of the end effector during the stapling stage and to define the closing mechanism in a second position to maintain the end effector in the open state in the initial state.

For example, in the anastomat provided by an embodiment of the present disclosure, the locking mechanism comprises a first limiting structure and a second limiting structure. A first limiting structure configured to limit the closure mechanism to the first position during the stapling stage; the second limit structure is configured to limit the closure mechanism to the second position in the initial state.

For example, an embodiment of the present disclosure provides for the stapler further to include a first elastic member connected with the closure mechanism; during the closing phase, the closing mechanism moves toward the end effector to close the end effector and elastically deform the first elastic member; in the stapling stage, the first elastic member elastically deformed applies a first resistance to the closing mechanism under the action of elastic restoring force of the first elastic member to prevent the closing mechanism from moving towards the end effector, the first limiting structure is configured to apply a second resistance to the closing mechanism opposite to the first resistance, and the first resistance and the second resistance are balanced to limit the closing mechanism to the first position; in the initial state, when the closing mechanism is subjected to a driving force that drives the closing mechanism to deviate from the second position, the second limiting structure is configured to apply a third resistance to the closing mechanism to balance with the driving force so as to limit the closing mechanism to the second position.

For example, in the anastomat provided by an embodiment of the present disclosure, the first limiting structure comprises a first limiting groove and a first locking member. The first limit groove is provided with a first side wall, is positioned on the closing mechanism and is configured to move along with the movement of the closing mechanism; at least part of the first end of the first locking member is limited in the first limit groove and is in contact with the first side wall in the nailing stage so as to apply fourth resistance to the first side wall, so that the second resistance is applied to the closing mechanism through the first limit groove, and the fourth resistance is equal to the second resistance in magnitude and the same direction; the second limiting structure comprises a second limiting groove and a second locking member; a second limit slot having a second side wall located on the closure mechanism and configured to move with movement of the closure mechanism; in the initial state, at least a portion of the first end of the second locking member is retained in the second retaining groove and is configured to be contactable with the second side wall to apply a fifth resistance to the second side wall, thereby applying the third resistance to the closure mechanism through the second retaining groove, the fifth resistance being equal in magnitude to the third resistance and in the same direction as the first resistance.

For example, in the stapler provided in an embodiment of the present disclosure, the first locking member and the second locking member are the same common locking member, and in the closing phase, the first limit groove and the second limit groove move relative to the common locking member to configure the common locking member to move from the second limit groove to the first limit groove; the common locking member and the first limiting groove constitute the first locking member when the first end of the common locking member is at least partially limited in the first limiting groove; the common locking member and the second limiting groove constitute the second locking member when the first end of the common locking member is at least partially limited in the second limiting groove.

For example, in the anastomat provided by an embodiment of the present disclosure, the moving directions of the closing mechanism, the first limiting groove and the second limiting groove are axial, and along the axial direction, the first limiting groove is located at a side of the second limiting groove away from the end effector.

For example, in the stapler provided in an embodiment of the disclosure, the locking mechanism further includes a channel slot located between and in communication with the first and second limit slots, wherein, during the closing phase, the common locking member is configured to move from the second limit slot to the first limit slot via the channel slot.

For example, in the stapler provided in an embodiment of the disclosure, the common locking member further includes a second end opposite to the first end, and a neck connecting the first end and the second end; the channel slot is configured to allow the neck portion to pass therethrough without allowing the first end portion to pass therethrough such that in the initial state, the first end portion cannot pass therethrough and is at least partially confined within the second limiting slot, and during the staple pushing stage, the first end portion cannot pass therethrough and is at least partially confined within the first limiting slot.

For example, in the anastomat provided by an embodiment of the present disclosure, a direction from the first end portion to the second end portion is a longitudinal direction, the longitudinal direction is perpendicular to the axial direction, and a direction perpendicular to the axial direction and the longitudinal direction is a transverse direction; the width of the channel groove in the transverse direction is smaller than the width of the first limit groove in the transverse direction and smaller than the width of the second limit groove in the transverse direction; the width of the first end portion in the transverse direction is greater than the width of the neck portion in the transverse direction and greater than the width of the channel groove in the transverse direction.

For example, in the anastomat provided by one embodiment of the present disclosure, the locking mechanism further comprises a locking driving structure; in the closing phase, the lock driving structure is configured to drive the common lock member to move in the longitudinal direction in a direction away from the second end to move the first end out of the second limit slot, and the neck is configured to move from the second limit slot to the first limit slot via the channel slot as the first limit slot and the second limit slot move; after the end effector is closed, the lock drive structure is configured to drive movement of the common lock member in the longitudinal direction toward approaching the second end such that at least a portion of the first end moves into the first limit slot to be retained therein, the at least a portion of the first end being in contact with the first side wall to apply the fourth resistance to the first side wall.

For example, in a stapler provided by an embodiment of the disclosure, at least a portion of the first end is in contact with a first portion of the first sidewall proximate the channel slot to apply the fourth resistance to the first portion of the first sidewall, the first portion of the first sidewall facing away from the end effector.

For example, in the anastomat provided by an embodiment of the present disclosure, the closing mechanism is a hollow sleeve, and the first limiting groove, the second limiting groove and the channel groove penetrate through the wall of the sleeve.

For example, an embodiment of the present disclosure provides an anastomat including a fixed support, wherein the sleeve is sleeved outside the fixed support, and the first limit groove, the second limit groove and the channel groove expose the outer surface of the fixed support; the fixed bracket includes a through hole extending through the outer surface, at least a portion of the neck and a second end being located in the through hole when at least a portion of the first end of the common locking member is either retained in the first retaining groove or retained in the second retaining groove.

For example, in the stapler provided in an embodiment of the disclosure, the first end portion includes a lower surface facing the fixing bracket, and when at least a portion of the first end portion of the common locking member is positioned in the first limit groove or the second limit groove, an outer surface of the fixing bracket is in direct contact with the lower surface of the first end portion to support the first end portion.

For example, in the anastomat provided by an embodiment of the present disclosure, the common locking member and the through holes form a latch structure.

For example, in the anastomat provided by an embodiment of the present disclosure, a length of at least a portion of the first end portion in the axial direction is smaller than a length of the first limiting groove in the axial direction.

For example, in the anastomat provided by an embodiment of the present disclosure, the first side wall is a first arc, at least a portion of a side surface of the first end portion, which contacts the first side wall, is a second arc, and curvatures of the first arc and the second arc are the same.

For example, in the anastomat provided by an embodiment of the present disclosure, the planar shape of the channel groove is a straight bar shape.

For example, in a stapler provided by an embodiment of the disclosure, the lock driving structure includes a bearing surface facing the common locking member; the bearing surface comprises a first surface, a first slope, a protruding surface, a second slope and a second surface which are sequentially arranged along the axial direction, wherein the first slope is connected with the first surface and the protruding surface, the second slope is connected with the protruding surface and the second surface, a first included angle is formed between the first slope and the protruding surface, and a second included angle is formed between the second slope and the protruding surface; in the longitudinal direction, a distance from the protruding surface to the second limit groove is smaller than a distance from the first surface to the second limit groove and smaller than a distance from the second surface to the second limit groove, a distance from the protruding surface to the passage groove is smaller than a distance from the first surface to the passage groove and smaller than a distance from the second surface to the passage groove, and a distance from the protruding surface to the first limit groove is smaller than a distance from the first surface to the first limit groove and smaller than a distance from the second surface to the first limit groove; in the initial state, the second end is positioned on one side of the first slope surface away from the second slope surface; during the closing phase, the lock drive structure is configured to move in the axial direction relative to the common lock member to move the second end along the first ramp to the protruding surface to drive the common lock member in the longitudinal direction toward a direction away from the second end, which in turn moves the second end along the protruding surface and the second ramp to a side of the second ramp away from the first ramp to move the common lock member in the longitudinal direction toward a direction closer to the second end; in the closing phase, movement of the lock drive structure relative to the common lock member is synchronized with movement of the first and second limit slots relative to the common lock member such that the neck moves from the second limit slot into the first limit slot via the channel slot during movement of the second end relative to the lock drive structure.

For example, in the stapler provided in an embodiment of the present disclosure, the fixed bracket and the common locking member do not move in the axial direction, and the locking driving structure moves in the axial direction.

For example, an embodiment of the present disclosure provides for the stapler to further include a first drive mechanism and a second drive mechanism. The first driving mechanism is connected with the second driving mechanism and is configured to drive the second driving mechanism to move; in the closing phase, the second drive mechanism is detachably connected with the closing mechanism and is configured to move towards the end effector under the drive of the first drive mechanism so that the closing mechanism contacts and applies pressure to the cartridge assembly and anvil to close the end effector; the locking driving structure is arranged on the second driving mechanism.

For example, in a stapler provided by an embodiment of the present disclosure, during the stapling stage, the second drive mechanism is configured to disengage from the closure mechanism and continue to move toward the end effector to drive the stapling assembly to eject the staples from the cartridge assembly; the first surface is positioned at one end of the second surface near the end effector, and the first end moves from the second limit groove to the first limit groove during the movement of the second end relative to the locking drive structure during the closing phase; during the stapling stage, the second end moves over the second surface and the second surface is configured to not apply a force to the second end that drives the common locking structure to move in the longitudinal direction.

For example, in the stapler provided in an embodiment of the disclosure, the locking mechanism further includes a second elastic member configured to be compressed during movement of the common locking member in the longitudinal direction toward a direction away from the second end portion, and to be restored under an elastic restoring force thereof during movement of the common locking member in the longitudinal direction toward a direction toward the second end portion.

For example, in the stapler provided in an embodiment of the present disclosure, the second end portion is tapered toward the bearing surface along the longitudinal direction.

For example, in the anastomat provided by an embodiment of the present disclosure, the first slope surface and the second slope surface are plane surfaces or curved surfaces.

For example, in a stapler provided by an embodiment of the disclosure, during an opening phase subsequent to the stapling phase, the locking mechanism is further configured to remove the definition of the position of the closing mechanism to cause the end effector to open.

For example, in a stapler provided by an embodiment of the present disclosure, during an opening phase subsequent to the stapling phase, the first stop structure is configured to eliminate the second resistance, and the closure mechanism is moved away from the end effector by the first resistance to move the cartridge assembly and the anvil away from each other to open the end effector.

For example, in the stapler provided in an embodiment of the present disclosure, when the first limit structure includes a first limit groove and a first locking member, the second limit structure includes a second limit groove and a second locking member, and the first locking member and the second locking member are the same common locking member, the common locking member is configured to move from the first limit groove to the second limit groove to return to the initial state in the open phase.

For example, in a stapler provided by an embodiment of the disclosure, when the locking mechanism further includes a channel slot, the common locking member is configured to move from the first limit slot to the second limit slot via the channel slot during the open phase.

For example, in the anastomat provided by an embodiment of the present disclosure, when the common locking member comprises a first end, a second end and a neck, and the locking mechanism further comprises a locking driving structure, a direction from the first end to the second end is a longitudinal direction, the longitudinal direction is perpendicular to the axial direction, and a direction perpendicular to the axial direction and the longitudinal direction is a transverse direction; the lock driving structure is further configured to drive movement of the common lock member in the longitudinal direction in a direction away from the second end to move the first end out of the first limit groove, and the neck is configured to move from the second limit groove to the first limit groove via the passage groove as the first limit groove and the second limit groove move.

For example, in a stapler provided by an embodiment of the disclosure, when the lock driving structure includes a bearing surface facing the lock member, the bearing surface includes a first surface, a first slope, a protruding surface, a second slope, and a second surface that are sequentially arranged along the axial direction, during the opening phase, the lock driving structure is configured to move relative to the common lock member along the axial direction to move the second end along the second slope to the protruding surface to drive the common lock member to move in the longitudinal direction toward a direction away from the second end, and then to move the second end sequentially along the protruding surface and the first slope to a side of the first slope away from the second slope to move the common lock member in the longitudinal direction toward a direction close to the second end; in the opening phase, movement of the lock drive structure relative to the common lock member is synchronized with movement of the first and second limit slots relative to the common lock member such that the neck moves from the first limit slot into the second limit slot via the channel slot during movement of the second end relative to the lock drive structure.

For example, one embodiment of the present disclosure provides for the stapler further to include a cutting device configured to cut the target tissue at a cutting stage subsequent to the stapling stage and prior to the opening stage.

For example, in a stapler provided by an embodiment of the disclosure, the first resilient member is located at an end of the locking mechanism near the end effector and is compressed as the closing mechanism moves toward the end effector; alternatively, the first resilient member is located at an end of the locking mechanism remote from the end effector and is stretched as the closure mechanism moves toward the end effector.

For example, one embodiment of the present disclosure provides for a stapler further comprising a detachable connection structure configured to connect with the sleeve and the second drive mechanism during the closing phase to move toward the end effector as the second drive mechanism moves to drive the sleeve toward the end effector, and configured to detach from the sleeve after the end effector is closed to stop driving the sleeve to move; the sleeve comprises a connecting hole penetrating through the barrel wall of the sleeve, and one end of the separable connecting structure is detachably inserted into the connecting hole so as to be detachably connected with the sleeve; the first limit groove, the second limit groove and the channel groove are opposite to the connecting hole.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following brief description of the drawings of the embodiments will make it apparent that the drawings in the following description relate only to some embodiments of the present invention and are not limiting of the present invention.

FIG. 1A is a schematic view of an overall structure of a stapler according to an embodiment of the present disclosure;

FIG. 1B is a top view of the stapler shown in FIG. 1A;

FIG. 2 is a schematic overall cross-sectional view taken along line B-B in FIG. 1B;

FIG. 3 is a schematic view of a portion of a stapler including an end effector and a closure mechanism, according to one embodiment of the present disclosure;

FIG. 4 is a schematic illustration of a portion of a stapler including a first drive mechanism, a second drive mechanism, a closure mechanism, and an end effector, provided in accordance with an embodiment of the present disclosure;

FIG. 5A is an overall schematic of a detachable portion of a stapler according to one embodiment of the present disclosure;

FIG. 5B is a schematic cross-sectional view of a main body portion of a stapler coupled to a detachable portion according to one embodiment of the present disclosure;

FIG. 5C is a schematic view of an end portion of a main body portion of a stapler coupled to a detachable portion according to one embodiment of the present disclosure;

FIGS. 6A-6F are schematic illustrations of a detachable connecting structure of a stapler according to an embodiment of the present disclosure, connected to and disconnected from a closing mechanism during a closing process;

FIG. 7 is a schematic view of the detachable connection structure of the embodiment shown in FIGS. 6A-6F;

FIG. 8 is a schematic view of a portion of a stapler including a first resilient member provided in an embodiment of the present disclosure;

FIG. 9 is a schematic view of a body portion of a stapler including a first drive mechanism, according to an embodiment of the present disclosure;

FIG. 10A is a structural diagram of a cartridge assembly and a staple pusher drive mechanism;

FIG. 10B is a top view of the stapler of FIG. 10A in an anvil orientation;

FIG. 10C is a top view of the stapler of FIG. 10A in a cartridge orientation;

FIG. 10D is a schematic cross-sectional view taken along the line J-J in FIG. 10C;

FIG. 10E is a schematic cross-sectional view taken along line H-H in FIG. 10B;

FIGS. 11A-11B are schematic illustrations of a staple pusher drive mechanism and a staple pusher sled being connected to each other without the staple pusher drive mechanism being connected to each other;

FIG. 12A is a schematic view of a staple pusher carriage carrying a cutting knife;

FIG. 12B is a schematic cross-sectional view of a staple pusher carriage carrying a cutting knife;

FIG. 12C is a schematic view of the end of the staple pusher sled proximate the cutting drive mechanism;

FIG. 12D is a schematic view of a cutting drive mechanism;

FIG. 12E is a schematic illustration of the connection of the cutting drive mechanism and the pusher sled coupled to each other;

FIG. 13A is a schematic illustration of a staple pushing process;

FIG. 13B is a schematic view of the cutting burr in the staple pushing stage when it is not in contact with the target tissue;

FIG. 13C is a schematic view of the staple pusher carriage carrying a cutting knife moving from a first end of the end effector to a second end of the end effector;

FIG. 13D is a schematic view of the cutting blade moving into contact with the target tissue during the stapling stage;

FIG. 14A is a schematic view of a forward swing drive assembly of a stapler according to one embodiment of the present disclosure;

fig. 14B is a schematic view of a forward swing driving assembly of a stapler according to an embodiment of the present disclosure;

15A-15B are schematic views of a forward swing drive member of a stapler provided in accordance with an embodiment of the present disclosure;

FIG. 16A is a schematic view of a portion of a rear swing drive assembly of a stapler according to one embodiment of the present disclosure;

FIG. 16B is a partial schematic view of a manual adjustment drive mechanism of a stapler according to one embodiment of the present disclosure;

FIG. 17 is a schematic view of a stapler provided in accordance with an embodiment of the present disclosure, wherein the staple pusher sled is positioned at the second end of the end effector prior to closing the end effector;

18A-18B are schematic views of a handle provided in an embodiment of the present disclosure;

FIG. 19 is an enlarged schematic view of a dial and a bi-directional control button;

fig. 20 is a schematic view of a main body of a stapler according to an embodiment of the disclosure.

Description of the embodiments

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without creative efforts, based on the described embodiments of the present invention fall within the protection scope of the present invention.

Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The terms "first," "second," and the like in the description and in the claims, are not used for any order, quantity, or importance, but are used for distinguishing between different elements. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. "inner", "outer", "upper", "lower", etc. are used merely to denote relative positional relationships, which may also change accordingly when the absolute position of the object to be described changes.

The drawings in this disclosure are not drawn to exact actual scale, nor are the number of staple slots in the cartridge for receiving staples limited to the number shown in the drawings, and the specific dimensions and numbers of the individual structures may be determined as desired. The drawings described in the present disclosure are only schematic in structure.

At least one embodiment of the present disclosure provides a stapler including an end effector, a closure mechanism, a staple pusher assembly, and a first drive mechanism. The end effector comprises a nail bin assembly and a nail anvil, and the nail bin assembly is internally provided with a anastomotic nail; the closing mechanism is configured to drive the cartridge assembly and the anvil into apposition to close the end effector; the staple pushing assembly is configured to push staples out of the cartridge assembly; the first drive mechanism is configured to: in a closing stage, the first driving mechanism is detachably connected with the closing mechanism to drive the closing mechanism to close the end effector; in a staple pushing stage following the closing stage, the first drive mechanism is decoupled from the closing mechanism and drives the staple pusher assembly to push staples from the cartridge assembly. The anastomat can be applied to the medical field, for example, used as a surgical instrument in the surgical process. During operation of the stapler, the closing phase and the stapling phase are independent of each other, do not interfere with each other, and the first driving mechanism is configured to drive the implementation of the two phases.

At least one embodiment of the present disclosure provides a stapler including an end effector, a closure mechanism, a first drive mechanism, and a cutting device. The end effector comprises a nail bin assembly and a nail anvil, and the nail bin assembly is internally provided with a anastomotic nail; the closing mechanism is configured to drive the cartridge assembly and the anvil to appose to clamp the target tissue; the staple pushing assembly is configured to push staples from the cartridge assembly into target tissue to staple the target tissue; the first drive mechanism is configured to: in a closing stage, the first driving mechanism is detachably connected with the closing mechanism to drive the closing mechanism to close the end effector; in a staple pushing stage after the closing stage, the first driving mechanism is separated from the closing mechanism and drives the staple pushing assembly to push out staples from the staple cartridge assembly; the cutting device is configured to cut the target tissue under the drive of the first drive mechanism at a cutting stage after the target tissue is entirely sutured.

At least one embodiment of the present disclosure provides a stapler including an end effector, a closure mechanism, a staple pusher assembly, and a locking mechanism. The end effector comprises a nail bin assembly and a nail anvil, wherein the nail bin assembly is provided with a anastomotic nail; in an initial state, the end effector is in an open state; in a closing phase, the closing mechanism is configured to drive the cartridge assembly and the anvil into apposition to close the end effector to clamp a target tissue; a staple pushing stage subsequent to the closing stage, the staple pushing assembly configured to push the staples out of the cartridge assembly to staple the target tissue; a locking mechanism configured to define the closing mechanism in a first position to maintain the closing mechanism in a closed state of the end effector during the stapling stage and configured to define the closing mechanism in a second position to maintain the end effector in the open state in the initial state.

At least one embodiment of the present disclosure provides a stapler including an end effector, a closure mechanism, a staple pusher assembly, a first drive mechanism, and a swing mechanism. The end effector comprises a nail bin assembly and a nail anvil, wherein the nail bin assembly is provided with a anastomotic nail; a closure mechanism configured to drive the cartridge assembly and the anvil into apposition to close the end effector to clamp a target tissue; a staple pushing assembly configured to push the staples out of the cartridge assembly; the first drive mechanism is configured to: in a closing phase, the first driving mechanism is detachably connected with the closing mechanism to drive the closing mechanism to close the end effector; a staple pushing stage following a closing stage, the first drive mechanism being separate from the closing mechanism and driving the staple pushing assembly to push the staples out of the cartridge assembly to staple the target tissue; the swing mechanism comprises a front swing driving assembly and a rear swing driving assembly, and the front swing driving assembly and the rear swing driving assembly are configured to drive the end effector to swing; the stapler includes a main body portion and a detachable portion detachably connected with the main body portion; the end effector and the front swing drive assembly are located in the detachable portion, and the first drive mechanism and the rear swing drive assembly are located in the main body portion; the detachable portion is detachably connected with the main body portion to detachably connect the front swing drive assembly with the rear swing drive assembly.

At least one embodiment of the present disclosure provides a stapler including an end effector, a closure mechanism, and a staple pusher assembly. The end effector comprises a nail bin assembly and a nail anvil, wherein the nail bin assembly is provided with a anastomotic nail; a closure mechanism configured to drive the cartridge assembly and the anvil into apposition during a closure phase to clamp a target tissue, the end effector having a first end proximal to the closure mechanism and a second end distal from the closure mechanism; a staple pusher assembly is configured to push the staples from the cartridge assembly into the target tissue from the second end to the first end and staple the target tissue from the second end to the first end during a staple pushing phase subsequent to the closing phase.

At least one embodiment of the present disclosure provides a handle configured to be detachably connected with a detachable portion comprising an end effector comprising a cartridge assembly and an anvil, wherein the handle comprises a dial switch comprising a dial disposed on a first surface of the handle, the dial configured to be toggled to rotate to control a swing direction and a swing angle of the end effector. The handle may be used in a stapler that may be used as a medical instrument, such as a surgical instrument, for holding a target tissue and suturing and cutting the target tissue.

At least one embodiment of the present disclosure provides an anastomat body comprising any one of the handles provided by the embodiments of the present disclosure, and a driving part connected with the handle; the whole extending direction of the driving part is an axial direction, and the axial direction is intersected with the extending direction of the handle; an end of the driving part, which is far away from the handle, is detachably connected with the detachable part, and comprises an electric motor and a back swing driving member; the electric motor is in signal connection with the dial switch, and the dial switch controls the work of the electric motor; a back swing drive member is connected to the electric motor extending in the axial direction, the electric motor configured to rotate under the control of the dial switch to drive the back swing drive member to move in the axial direction to drive the end effector to swing.

At least one embodiment of the present disclosure provides a stapler including any one of the stapler bodies provided by the embodiments of the present disclosure, and the detachable portion. The detachable portion is detachably connected with the main body portion, and the detachable portion further comprises a front swing driving assembly; an anterior swing drive assembly is coupled to the end effector, the detachable portion is detachably coupled to the stapler body such that the anterior swing drive assembly is detachably coupled to the posterior swing drive member, and the anterior swing drive assembly drives the end effector to swing under the drive of the posterior swing drive member.

Illustratively, fig. 1A is a schematic overall structure of an anastomat 100 according to an embodiment of the present disclosure, fig. 1B is a schematic overall cross-sectional view of the anastomat shown in fig. 1A, fig. 2 is a schematic overall cross-sectional view along line B-B in fig. 1B, fig. 3 is a schematic partial view of an end effector and a closing mechanism of the anastomat according to an embodiment of the present disclosure, and fig. 4 is a schematic partial view of an anastomat including a first driving mechanism, a second driving mechanism, a closing mechanism and an end effector according to an embodiment of the present disclosure. The stapler 100 is applicable to the medical field, and embodiments of the present disclosure will be described with reference to the stapler 100 being used as a surgical instrument during a surgical procedure.

Referring to fig. 1-4, stapler 100 includes an end effector 11, a closure mechanism 2, a staple pusher assembly 11, and a first drive mechanism 10. The end effector 11 includes a cartridge assembly 11 and an anvil 12, with staples disposed in the cartridge assembly 11. The closure mechanism 2 is configured to drive the cartridge assembly 11 and anvil 12 into apposition to close the end effector 11; staple cartridge assembly 11 is configured to eject staples from cartridge assembly 11. The first driving mechanism 10 is configured to: in the closing phase, the first driving mechanism 10 is detachably connected with the closing mechanism 2 to drive the closing mechanism 2 to close the end effector 11 to clamp the target tissue; in a staple pushing stage following the closing stage, the first drive mechanism 10 is disengaged from the closing mechanism 2 and drives the staple pushing assembly to push staples out of the cartridge assembly to staple the target tissue. The target tissue is, for example, a target tissue to be sutured and cut in surgery, for example, a human or animal body tissue. In the operation process of the anastomat 100, the closing stage and the nailing stage are independent of each other and do not interfere with each other, and the first driving mechanism 10 is configured to drive the two stages, so that the driving structure is greatly simplified, the whole structure of the anastomat 100 is effectively simplified, the space is saved, the radial dimension of the anastomat 100 is favorably reduced, the anastomat is easy to enter an operation object such as a human body in the operation process, and the damage to the operation object is reduced; in addition, the simplification of the driving structure makes the operation process of the anastomat 100 easier and smoother, has outstanding contribution to improving the reliability of operation, and reduces the design difficulty of a control system for controlling the operation process of the anastomat 100.

For example, the cartridge assembly 11 includes a first end proximate the closure mechanism 2, the anvil 12 includes a first end proximate the closure mechanism 2, and the first end of the cartridge assembly 11 is movably coupled to the first end of the anvil 12; the closure mechanism 2 is configured to apply pressure to a first end of the cartridge assembly 11 and a first end of the anvil 12 to bring the two closer together into apposition. The anvil 12 includes a working surface facing the cartridge assembly 11, the cartridge assembly 11 including a staple ejection surface opposite the working surface, and the closure mechanism 2 is configured to drive the working surface and the staple ejection surface toward one another for apposition.

In the embodiment shown in fig. 1-4, at least one staple channel 110 is provided on the staple cartridge, each having an opening toward the anvil 12. In some examples, the opening of each staple channel may be independently square, circular, triangular, etc. in shape and configured independently to: during the stapling stage, staples accommodated in the staple slots are allowed to be ejected through their openings. Embodiments of the present disclosure are not limited in this regard.

In some examples, the openings of the plurality of staple slots may be uniformly aligned on the staple exit face of the staple cartridge or arranged in a pattern. For example, the openings of the plurality of staple slots can be arranged to form at least one line, rectangle, triangle, diamond, circle, etc. on the staple exit face of the staple cartridge. Embodiments of the present disclosure are not limited in this regard.

In some examples, the staples may be formed from a material that is compatible with, or at least harmless to, the human body. For example, the material of the staples may include medical grade stainless steel, titanium alloys, biodegradable magnesium alloys, and the like. Further, for example, the staples may have a passivation layer, plating or coating, etc. on at least a portion of the surface that is compatible with or at least harmless to the human body. Embodiments of the present disclosure are not limited in this regard.

In some examples, anvil 12 may be formed of a rigid material that is, for example, compatible with or at least harmless to the human body. The anvil 12 material may include, for example, medical grade stainless steel, titanium alloy, cobalt alloy, and other metallic materials; or nonmetallic materials such as medical ceramics, hard plastics and the like. For example, the anvil 12 may also have a passivation layer, plating, or coating, etc., on at least a portion of the inner and/or outer surfaces that is compatible with or at least harmless to the human body. Embodiments of the present disclosure are not limited in this regard.

For example, as shown in fig. 2 and 4, stapler 100 further comprises a second drive mechanism 20, second drive mechanism 20 being coupled to first drive mechanism 10, being removably coupled to closure mechanism 2 during a closing phase and configured to be moved toward end effector 1 by the drive of first drive mechanism 10 to bring the closure mechanism into contact with cartridge assembly 11 and anvil 12 and to apply pressure to cartridge assembly 11 and anvil 12 to close end effector 1; the second drive mechanism 20 is also configured to disengage from the closure mechanism 2 during the staple ejection phase and to drive the staple ejection assembly to eject staples from the cartridge assembly 11 under the drive of the first drive mechanism 10.

Fig. 5A is an overall schematic view of a detachable portion 3 of a stapler 100 according to an embodiment of the present disclosure, and as shown in fig. 5A, the stapler 100 includes a main body portion 4 and a detachable portion 3, wherein the detachable portion 3 is detachably connected to the main body portion 4; the first drive mechanism 10 is located in the main body portion 4, and the second drive mechanism 20, the closure mechanism 2, the staple pusher assembly and the end effector 1 are located in the detachable portion 3, the detachable portion 3 being connected to the main body portion 4 such that the second drive mechanism 20 is detachably connected to the first drive mechanism 10. The detachable part 3 is designed to be used as part of an operation procedure into an object, such as a human body, without the main body part 4 having to be used in the interior of the object, and the detachable part 3 can be replaced, for example, by replacing the detachable part 3 every time an operation is performed, without replacing the main body part 4 with the first drive mechanism, which results in a great cost saving. Compared with a detachable structure which can be detached from the handle, the detachable part 3 reduces the structure and the volume of the detachable part, and further reduces disposable parts, thereby further reducing the cost and improving the recycling rate of the main body part.

For example, as shown in fig. 2 and 4, the extending directions of the first driving mechanism 10 and the second driving mechanism 20 are axial, the first driving mechanism 10 includes a first end distant from the end effector 1 in the axial direction and a second end opposite to the first end thereof, and the second driving mechanism 20 includes a first end close to the first driving mechanism 10 and a second end distant from the first driving mechanism 10 in the axial direction. Fig. 5B is a schematic cross-sectional view of the main body portion 4 of the anastomat 100 connected to the detachable portion 3 according to an embodiment of the present disclosure, and fig. 5C is a schematic view of an end portion of the main body portion 4 of the anastomat 100 connected to the detachable portion 3 according to an embodiment of the present disclosure. For example, as shown in fig. 5B-5C, the body portion 4 and the detachable portion 3 may take the form of a plug-in connection. When the body part 44 is connected to the detachable part 3, the first end of the second driving mechanism 20 is provided with a groove 200, the second end of the first driving mechanism 10 is provided with a protruding structure which is configured to be inserted into the groove, and then after the detachable part 3 is rotated in the forward direction relative to the body part 4 by 90 degrees for example, the protruding structure of the second end of the first driving mechanism 10 is blocked by the groove wall of the groove of the first end of the second driving mechanism 20 and cannot move relative to the second driving mechanism 20 in the axial direction, so that the protruding structure of the second end of the first driving mechanism 10 is locked at the position, and the second end of the first driving mechanism 10 is connected with the first end of the second driving mechanism 20; when it is desired to detach the detachable portion 3 from the main body portion 4, rotating the detachable portion 3 in a reverse direction, for example, by 90 ° with respect to the main body portion 4, opposite to the forward direction, the lock of the protruding structure of the second end of the first driving mechanism 10 can be released, thereby detaching the first driving mechanism 10 from the second driving mechanism 20, i.e., detaching the detachable portion 3 from the main body portion 4. The detachable connection mode is simple to operate and easy to control, and is beneficial to the stability of equipment during use and installation. Of course, the main body portion 4 and the detachable portion 3 may be connected by a plurality of manners such as screw connection or clamping connection, and the second end of the first driving mechanism 10 and the first end of the second driving mechanism 20 may be connected by other removable manners such as clamping connection, hooking connection, magnetic connection, etc., which is not limited in this disclosure.

For example, in a closing phase in which the first drive mechanism 10 drives the closing mechanism 2 to close the end effector 1 and a staple pushing phase in which the staple pusher assembly is driven to push staples out of the cartridge assembly 11, the first drive mechanism 10 moves toward the end effector 1. For example, the second drive mechanism 20 is further configured to disengage from the closure mechanism 2 during the staple ejection phase and drive the staple ejection assembly to eject staples from the cartridge assembly 11 under the drive of the first drive mechanism 10. For example, during the closing phase and the stapling phase, the second drive mechanism 20 is also moved axially towards the end effector 1 under the drive of the first drive mechanism 10. For example, during both the closing phase and the stapling phase, the first drive mechanism 10 and the second drive mechanism 20 are each moved substantially linearly in the axial direction. For example, the first driving mechanism 10 is a single driving rod, so that the single driving rod moves along the axial direction to drive the completion of the closing stage and the staple pushing stage, the driving structure is greatly simplified, the overall structure of the stapler 100 is effectively simplified, the space is saved, the size of the stapler 100 is favorably reduced, and the surgical object such as a human body is easily accessed during the operation, and the injury to the surgical object is reduced; in addition, the simplification of the driving structure makes the operation process of the anastomat 100 easier and smoother, has outstanding contribution to improving the reliability of operation, and reduces the design difficulty of a control system for controlling the operation process of the anastomat 100.

For example, as shown in fig. 4 and 5B, the stapler 100 further includes a detachable connection structure 6, the detachable connection structure 6 is configured to be connected with the closing mechanism 2 and the second driving mechanism 20 in a closing stage so as to move toward the end effector 1 with movement of the second driving mechanism 20 to drive the closing mechanism 2 to move toward the end effector 1 so as to close the end effector 1, and the detachable connection structure 6 is configured to be detached from the closing mechanism 2 after the end effector 1 is closed. The extending direction of the first driving mechanism 10 and the second driving mechanism 20 is axial, the direction perpendicular to the axial direction is longitudinal, and the separable connecting structure 6 comprises a first end and a second end in the longitudinal direction; the second drive mechanism 20 comprises a first connection structure and the closing mechanism 2 comprises a second connection structure.

For example, during movement of the closure mechanism 2 toward the end effector 1 by the detachable connection structure 6, a first end of the detachable connection structure 6 is connected to the second drive mechanism 20 via the first connection structure, and a second end of the detachable connection structure 6 is connected to the closure mechanism 2 via the second connection structure; the detachable connection structure 6 is configured to be movable in a longitudinal direction relative to the first and second connection structures to detach the second end of the detachable connection structure 6 from the closing mechanism or to detach the first end of the detachable connection structure 6 from the second driving mechanism 20.

For example, stapler 100 further includes a detachment drive mechanism configured to apply a longitudinal drive force to detachable connection structure 6 after end effector 1 is closed to cause detachable connection structure 6 to move longitudinally under the drive force to detach the second end of detachable connection structure 6 from the closure mechanism or to detach the first end of detachable connection structure 6 from second drive mechanism 20.

Fig. 6A-6F are schematic views of a detachable connection structure 6 for connecting and disconnecting a closing mechanism of a stapler 100 according to an embodiment of the present disclosure. Referring to fig. 6A-6E, for example, the closing mechanism is a sleeve 2 sleeved outside the second driving mechanism 20, the second connecting structure is a connecting hole 23 penetrating through the wall of the sleeve 2, and the second end of the separable connecting structure 6 is detachably inserted into the connecting hole 23. Fig. 7 is a schematic view of the detachable connection structure 6 in the embodiment shown in fig. 6A-6F, and as shown in fig. 6A-6F and fig. 7, in this embodiment, the detachable connection structure 6 is a slider, and the first connection structure is a groove 203 provided in the second driving mechanism 20. Of course, in other embodiments, the detachable connection structure 6 may be of other types, not limited to the slider; the first connection structure is not limited to the groove, and the second connection structure is not limited to the connection hole 23 penetrating the wall of the sleeve 2, as long as the above-mentioned function can be achieved. The closing mechanism is not limited to the sleeve 2, and may be any other mechanism that can drive the end effector 1 to close and open under the drive of the first drive mechanism 10.

The sleeve 2 may be formed of, for example, a rigid material that is compatible with or at least harmless to the human body. For example, the material of the sleeve 2 may include, for example, a metal material such as medical stainless steel, titanium alloy, cobalt alloy, or the like; or nonmetallic materials such as medical ceramics, hard plastics and the like. Further, the sleeve 2 may also have a passivation layer, plating or coating or the like on at least a portion of the inner and/or outer surfaces that is compatible with or at least harmless to the human body. Embodiments of the present disclosure are not limited in this regard.

For example, the sleeve 2 is a hollow arcuate barrel having a circular cross-section to facilitate reducing bruising of tissue of a surgical object, such as a human body, as the sleeve 2 is advanced into the surgical object during surgery. The sleeve 2 has a wall and a cavity surrounded by the wall, and during the closing phase, the second drive mechanism 20 and the like is positioned within the cavity to minimize structures located outside the sleeve 2 to minimize bruising of tissue of the subject during the surgical procedure when the sleeve 2 is introduced into the subject's body. The sleeve 2 is partially closed at one end remote from the end effector 1 and open at the other end near the end effector 1.

As shown in fig. 6A-6B and 7, in the closing phase, the first end of the detachable connection structure 6 is connected to the second driving mechanism 20 through the connection hole 23 on the sleeve 2, and the second end of the detachable connection structure 6 is connected to the sleeve 2 through the groove 203 of the second driving mechanism 20, so that the closable mechanism is connected to the second driving mechanism 20 through the detachable connection structure 6, and thus, the sleeve 2 moves toward the end effector 1 along with the movement of the second driving mechanism 20 to drive the sleeve 2 to move toward the end effector 1. Referring to fig. 3, cartridge assembly 11 includes a first end adjacent sleeve 2 and anvil 12 includes a first end adjacent sleeve 2; in the closing phase, the second drive mechanism 20 is driven by the first drive mechanism 10 to move toward the end effector 1 and drive the sleeve 2 to move toward the end effector 1, such that the sleeve 2 is positioned over the first end of the cartridge assembly 11 and the first end of the anvil 12 and applies pressure to the first end of the cartridge assembly 11 and the first end of the anvil 12 to close the end effector 1, thereby clamping the target tissue by the end effector 1.

The detachable connection 6 of fig. 6A-6F is detachably connected to the second drive mechanism 20 and to the closing mechanism. Referring to fig. 7, the separable connecting structure 6 includes a main body portion 61 and a first boss 611 protruding from a first surface of the main body portion 61, the first surface of the main body portion 61 facing the recess 203, the first boss 611 being located at a first end of the separable connecting structure 6; the first boss 611 includes a first inclined surface 6111, and the first inclined surface 6111 intersects the axial direction and the longitudinal direction. As shown in fig. 6E, the anastomat 100 further comprises a fixed bracket 8, the closing mechanism is arranged on the fixed bracket 8, and the fixed bracket 8 comprises a first sliding groove 81 and a second sliding groove 82; the first chute 81 extends in the axial direction; the second chute 82 extends in the axial direction, communicates with the first chute 81, is located on a side of the first chute 81 close to the end effector 1, and includes a first chute wall and a second chute wall that are opposed to each other in the lateral direction; the transverse direction is perpendicular to the axial direction and the longitudinal direction, and the first groove wall is used as the separation driving structure; the face of the first groove wall facing the detachable connection structure 6 has a first barrier bevel 801, the first barrier bevel 801 intersecting with the axial direction and the longitudinal direction.

In the closing stage, one end of the main body portion 61 of the detachable connection structure 6 is located in the connection hole 23 of the sleeve 2 to drive the sleeve 2 to move in the axial direction, and the first boss 611 is partially embedded in the groove 203 so that the detachable connection structure 6 moves toward the end effector 1 with the movement of the second driving mechanism 20. The separation driving structure is located at a side of the separable connecting structure 6 near the end effector 1, the first barrier inclined surface 801 contacts with the first inclined surface 6111 of the first boss 611 to apply resistance in the axial direction and driving force in the longitudinal direction to the first inclined surface 6111 after the separable connecting structure 6 drives the sleeve 2 to move toward the end effector 1 in the axial direction so as to close the end effector 1, the first barrier inclined surface 801 is parallel to the first inclined surface 6111, and the separable connecting structure 6 moves in the longitudinal direction by the driving force in the longitudinal direction so as to separate the second end of the separable connecting structure 6 from the closing mechanism, as shown in fig. 6C to 6F. In the present embodiment, for example, the first boss 611 of the detachable connection structure 6 is spaced apart by a sliding distance between an end face located at least partially in the groove 203 in the longitudinal direction and a bottom face of the groove 203 facing the end face in the closing stage, so that the detachable connection structure 6 can be slid in the longitudinal direction toward the bottom face of the groove 203 to be detached from the sleeve 2 in the stapling stage. That is, after the separable connecting structure 6 drives the closing mechanism to move in the axial direction toward the end effector 1 to close the end effector 1, the separable driving structure contacts the first inclined surface 6111 to apply the resistance in the axial direction and the driving force in the longitudinal direction to the first inclined surface 6111, and the separable connecting structure 6 moves in the longitudinal direction by the driving force in the longitudinal direction.

As shown in fig. 6F, after the closing stage, at least part of the main body portion 61 of the separable connecting structure 6 in the axial direction enters into the second slide groove 82 to bring the first barrier inclined surface 801 into contact with the first inclined surface 6111. In this way, the limited space in the sleeve 2 is fully utilized to realize that the separable connecting structure 6 connects the second driving mechanism 20 and the sleeve 2 in the closing stage and separates from the sleeve 2 in the nail pushing stage after the closing stage, so that when the first driving mechanism 10 and the second driving mechanism 20 drive the nail pushing assembly to push nails in the nail pushing stage, the sleeve 2 does not move along with the second driving mechanism 20 in the axial direction any more, and the stability of the closed end effector 1 is maintained.

For example, the thickness of the first boss 611 in the lateral direction is greater than the depth of the groove 203 in the lateral direction, so that the main body portion 61 of the separable connecting structure 6 is located outside the groove 203, facilitating the main body portion of the separable connecting structure 6 to enter the second chute 82.

For example, the first inclined surface 6111 extends beyond the groove 203 in the longitudinal direction, i.e. the first inclined surface 6111 is located outside the groove 203 in the longitudinal direction, so as to ensure that the main body portion of the separable connecting structure 6 can contact with the first barrier inclined surface 801 after entering the second sliding groove 82, and ensure the reliability of the normal operation of the stapler 100 in the closing stage.

For example, in the embodiment shown in fig. 6A-6F, the first inclined surface 6111 forms an obtuse angle with the axial direction, which is the angle between the first inclined surface 6111 and the central axis of the sleeve 2. The detachable connection structure 6 moves away from the closing mechanism in the longitudinal direction and is detached from the closing mechanism under the action of the driving force in the longitudinal direction, so that the detachable connection structure 6 is positioned inside the cavity of the sleeve 2 in the nailing stage, and the obvious protruding structure outside the sleeve 2 is avoided, so that the contusion of tissues of an operation object caused by the protruding structure positioned outside the sleeve 2 when the sleeve 2 enters the operation object such as a human body in operation is avoided or reduced.

Of course, in other embodiments, the included angle between the first inclined surface 6111 and the axial direction, which is close to the end effector 1, may be designed to be an acute angle, and the detachable connection structure 6 moves close to the sleeve 2 in the longitudinal direction under the action of the driving force in the longitudinal direction to be detached from the second driving mechanism 20, that is, the direction of the driving force is opposite to that of the driving force in the embodiment shown in fig. 6A-6F, and the moving direction of the detachable connection structure 6 is opposite to that of the detachable connection structure 6 in the embodiment shown in fig. 6A-6F. In this case, during the stapling phase, the detachable connection 6 is located on the sleeve 2 and does not move with the movement of the second drive mechanism 20. That is, in other embodiments, the first end of the detachable connection structure 6 is detached from the second drive mechanism 20, and after the sleeve 2 drives the end effector 1 closed, the detachable connection structure 6 is detached from the second drive mechanism 20 to stop driving the closure mechanism to move.

In some embodiments, for example, as in fig. 7, the detachable connection structure 6 further includes a second boss 612. The second boss 612 protrudes from a second surface of the main body portion and is located at a first end of the separable connecting structure 6, and includes a second inclined surface 6121 intersecting the axial direction and the longitudinal direction, the second surface being opposite to the first surface; the second groove wall also serves as a separation driving structure and includes a second barrier inclined surface 802 facing the separable connecting structure 6, the second barrier inclined surface 802 being configured to contact the second inclined surface 6121 to apply resistance in the axial direction and driving force in the longitudinal direction to the second inclined surface 6121 and to be parallel to the second inclined surface 6121; after the closing phase, at least part of the main body portion of the separable connecting structure 6 in the axial direction enters into the second slide groove 82, and the first boss 611 and the second boss 612 are blocked outside the second slide groove 82 by the first groove wall and the second groove wall so that the first barrier inclined surface 801 is in contact with the first inclined surface 6111, and the second barrier inclined surface 802 is in contact with the second inclined surface 6121. The second boss 612 not only can increase the symmetry of the detachable connection structure 6 and improve the structural stability of the detachable connection structure 6, but also can increase the driving force, which is beneficial to ensuring the reliability of the detachment of the detachable connection structure 6 from the sleeve 2. For example, after the first barrier bevel 801 contacts the first bevel 6111, the two complement each other; after the second barrier bevel 802 contacts the second bevel 6121, the two complement each other.

For example, as shown in fig. 7, the first boss 611 further includes a first platform portion having a first horizontal surface 6110, where the first horizontal surface 6110 intersects and connects with the first inclined surface 6111, and the first platform portion can increase the mechanical strength of the first boss 611, so that the structure and the position are more stable when the first boss 611 is located in the groove 203. Similarly, the second boss 612 further includes a second land portion having a second horizontal plane intersecting and connected with the second inclined surface 6121, which can increase the mechanical strength of the second boss 612, and in the case where the first boss 611 has the first land portion, the symmetry of the separable connecting structure 6 is increased to make the structure more stable.

For example, the width of the first sliding groove 81 in the lateral direction is larger than the width of the second sliding groove 82 in the lateral direction, so that only the main body portion 61 of the detachable connection structure 6 can enter the second sliding groove 82, but the first boss 611 and the second boss 612 cannot enter the second sliding groove 82, thereby achieving the above-described driving of the detachable connection structure 6 to move in the longitudinal direction to be detached from the sleeve 2.

For example, in some embodiments, the width of the second sliding groove 82 in the transverse direction is greater than the width of the main body portion and less than the sum of the width of the first boss 611, the width of the main body portion and the width of the second boss 612, so that when the main body portion 61 of the detachable connection structure 6 slides in the first sliding groove 81, sufficient space is reserved for the first boss 611 and the second boss 612, and at the same time, the width of the first sliding groove 81 is reduced as much as possible, which is beneficial to the stability of the position of the main body portion of the detachable connection structure 6 when sliding in the first sliding groove 81, and is beneficial to the improvement of the mechanical strength and the mechanical stability of the fixing bracket 8, thereby improving the stability of the whole anastomat 100.

For example, in other embodiments, the width of the first sliding slot 81 in the transverse direction is greater than the sum of the width of the first boss 611 in the transverse direction, the width of the main body portion in the transverse direction, and the width of the second boss 612 in the transverse direction, so as to ensure that when the main body portion of the separable connecting structure 6 slides in the first sliding slot 81, sufficient space is left for the first boss 611 and the second boss 612, thereby ensuring that the main body portion of the separable connecting structure 6 can smoothly enter the second sliding slot 82.

For example, the length of the second sliding groove 82 in the axial direction is smaller than that of the first sliding groove 81, so as to reduce the size of the slot on the fixing support 8 as much as possible, which is beneficial to improving the mechanical strength and the mechanical stability of the fixing support 8, thereby improving the stability of the whole anastomat 100.

The above embodiments are exemplary, and in other embodiments, the detachable connection structure 6 may be fixedly connected with one of the second driving mechanism 20 and the closing mechanism, and detachably connected with the other of the second driving mechanism 20 and the closing mechanism.

As shown in fig. 3, for example, one end of the end effector 1 near the sleeve 2 includes a guide slope 101, the guide slope 101 having an angle with the axial direction and the longitudinal direction, the guide slope 101 including a first end near the sleeve 2 in the axial direction and a second end far from the sleeve 2, the first end also being closer to the sleeve 2 than the second end in the longitudinal direction. In the closing stage, the sleeve 2 contacts the guide inclined surface 101 before contacting the cartridge assembly 11 and the anvil 12 and slides along the guide inclined surface 101 towards the cartridge assembly 11 and the anvil 12, so that the sleeve 2 is sleeved on the first end of the cartridge assembly 11 and the first end of the anvil 12 to apply pressure to the first end of the cartridge assembly 11 and the first end of the anvil 12 to close the end effector 1, and the reliability of normal operation in the closing stage is improved.

For example, the barrel wall of the sleeve 2 includes a curved surface, such as the arcuate surface described above, and at least one of the first end of the cartridge assembly 11 and the first end of the anvil 12, such as the first end of the anvil 12, includes a curved force-receiving surface 102, the curved force-receiving surface 102 configured to contact the sleeve 2 and receive the pressure applied by the sleeve 2 to increase the force-receiving area of the sleeve 2 against the end effector 1 during the closing phase, facilitate driving the end effector 1 closed and stability after closure, and reduce target tissue slippage, as shown in fig. 3. For example, the sleeve 2 includes an inner surface in contact with the force-bearing surface, the inner surface being curved; the curvature of the stress surface is equal to the curvature of the inner surface of the sleeve 2, so that the force application area of the sleeve 2 to the end effector 1 in the closing stage is further increased, the end effector 1 is driven to be closed and stability after closing is facilitated, and the target tissue slippage is reduced.

Fig. 13A is a schematic view of a stapling process. For example, referring to fig. 13A, the staple pushing assembly includes a staple pusher 700, a staple pusher sled 60, and a staple driving mechanism 40. Staple pusher 700 is configured to apply pressure to staples to eject staples from the staple cartridge; the ejector pin sled 60 is configured to apply pressure to the ejector pin blade 700 to drive the ejector pin blade 700 to apply ejector pin pressure to the staples; the staple driving mechanism 40 is configured to move axially under the drive of the first and second driving mechanisms 20 to drive the staple pusher 60 to move axially such that the staple pusher 60 contacts the staple pusher 700 to apply a staple pushing pressure to the staple pusher 700.

For example, in some embodiments, prior to staple pushing, the staple pushing drive mechanism 40 is coupled to the second drive mechanism 20 and moves into contact with the staple pushing sled 60 as the second drive mechanism 20 moves, which further facilitates the reliability of the movement of the second drive mechanism 20 to subsequently drive the staple pushing drive mechanism 40 and the operational stability of the stapler 100 during the staple pushing stage, and reduces design difficulties.

For example, in other embodiments, prior to stapling, the staple pusher drive mechanism 40 is positioned on a side of the second drive mechanism 20 adjacent to the staple pusher sled 60 with a space therebetween, i.e., when the staple pusher drive mechanism 40 is uncoupled from the second drive mechanism 20, the second drive mechanism 20 is coupled to the staple pusher sled 60 after being moved axially toward the end effector 1 through the space.

For example, after the stapling stage, the first drive mechanism 10 is further configured to drive the closure mechanism away from the end effector 1 to move the cartridge assembly 11 and anvil 12 away from each other to open the end effector 1. That is, a closure mechanism, such as sleeve 2, is moved away from end effector 1 to release the first end of anvil 12 and the first end of cartridge assembly 11 to open anvil 12 and cartridge assembly 11.

Fig. 8 is a schematic view of a portion of a stapler 100 including a first elastic member 71 according to an embodiment of the present disclosure. For example, as shown in fig. 8, the stapler 100 further includes a first elastic member 71, the first elastic member 71 being connected with the closing mechanism. In the closing phase, the closing mechanism moves towards the end effector 1 to close the end effector 1 and elastically deform the first elastic member 71; after the stapling stage, the closure mechanism is moved away from the end effector 1 by the elastically deformed first elastic member 71 under its elastic restoring force.

The first elastic member 71 deforms under an external load, and after the external load is removed, the deformation completely disappears and completely returns to its original shape and size. For example, the material of the first elastic member 71 may include some resin or natural material having elastic compression set properties, etc., such as, but not limited to, thermoplastic elastomer (thermoplastic elastomer, TPE), thermoplastic polyurethane (thermoplastic polyurethane, TPU), thermoplastic polyester elastomer (thermoplastic polyester elastomer, TPEE), etc. The first elastic member 71 may be made of, for example, a block elastic member or a hollow columnar elastic member, or the like. As another example, the elastically compressive deformation structure may include some structure having an elastically compressive deformation property, such as a compression spring, a zigzag elastic member, an accordion-like elastic member, a lantern skeleton-like elastic member, or the like. The elastically compressively deformable structure may be formed of materials such as, but not limited to, metal, plastic, or ceramic. Embodiments of the present disclosure are not limited in this regard.

For example, in the embodiment shown in fig. 8, the sleeve 2 includes a catch structure 24 protruding inward from the inner wall of the sleeve 2, and the first elastic member 71 is located on the side of the catch structure 24 near the end effector 1 to be configured to be compressed as the closing mechanism moves toward the end effector 1 to fully utilize the limited space inside the sleeve 2 to achieve compression and restriction of the first elastic member 71.

For example, in other embodiments, the first resilient member 71 is positioned on a side of the retaining structure 24 proximate to the end effector 1 to be configured to be stretched as the closure mechanism moves toward the end effector 1, and as such, the same or similar technical effect as in fig. 8 may be achieved.

Fig. 9 is a schematic view of a main body portion 4 of a stapler 100 including a first driving mechanism 10 according to an embodiment of the present disclosure, and as shown in fig. 9, the stapler 100 further includes an electric driving mechanism, where the electric driving mechanism is located on the main body portion 4, and the main body portion 4 includes, for example, a handle 9 and a driving portion 99 connected to the handle 9; for example, the electric drive mechanism is located on the handle 9 and/or the drive portion 99, and the first end of the first drive mechanism 10 is connected to the electric drive mechanism, and the electric drive mechanism drives the first drive mechanism 10 to move in the axial direction. For example, the electric driving mechanism includes a motor and a turbine linkage mechanism moving under the driving of the motor, and a person skilled in the art can design the electric driving mechanism according to the conventional technology, and the structure of the electric driving mechanism is not limited in this disclosure.

For example, stapler 100 also includes a cutting device. The staple cartridge assembly 11 and the anvil 12 are engaged to clamp the target tissue; after the staple cartridge assembly pushes out the staples from the cartridge assembly 11, the staples enter the target tissue to staple the target tissue; the first drive mechanism 10 is also configured to drive the cutting device to cut the target tissue. That is, the first driving mechanism 10 is further configured to drive the cutting device to cut the target tissue, further simplifying the driving structure, saving space, and reducing the volume of the stapler 100, thereby facilitating access to the surgical object such as a human body during the surgical procedure and reducing injury to the surgical object; in addition, the simplification of the driving structure makes the operation process of the anastomat 100 easier and smoother, has outstanding contribution to improving the reliability of operation, and reduces the design difficulty of a control system for controlling the operation process of the anastomat 100. For example, the target tissue is sutured after the entire target tissue is sutured. Of course, it is also possible to perform a side-by-side stitch and a side-cut on the target tissue, i.e., to stitch and then cut each local portion of the target tissue. Specific suturing and cutting means will be described below.

For example, stapler 100 further includes a cutting drive mechanism configured to drive the cutting device under the drive of first drive mechanism 10 to cut the target tissue. For example, the staple pushing drive mechanism 40 is multiplexed as a cutting drive mechanism to simplify the construction and save space. The second drive mechanism 20 is further configured to be coupled to the cutting drive mechanism for driving the cutting drive mechanism to move during the cutting phase, i.e. in case the staple pushing drive mechanism 40 is multiplexed as the cutting drive mechanism, the second drive mechanism 20 is further configured to be coupled to the staple pushing drive mechanism 40 for driving the staple pushing drive mechanism 40 to move during the cutting phase.

For example, the cutting device includes a carrier member and a cutting blade 605, the cutting blade 605 being movably coupled to the carrier member, the cutting drive mechanism being configured to drive the carrier member to move the cutting blade 605. Fig. 12A is a schematic structural view of a staple pusher with a cutter, for example, referring to fig. 12A and 13A, the staple pusher 60 is reused as a cutter carrying member to further simplify the structure, save space, and facilitate driving and control of the staple pusher stage and the cutting stage.

The stapling stage and the cutting stage of stapler 100 will be described below with reference to the case where staple pushing mechanism 40 is multiplexed as the cutting driving mechanism.

In a closing stage in which the first driving mechanism 10 drives the closing mechanism to close the end effector 1 and a staple pushing stage in which the staple pushing assembly is driven to push out staples from the cartridge assembly 11, the first driving mechanism 10 moves toward the end effector 1; for example, during a cutting phase, the first drive mechanism 10 is moved away from the end effector 1 to drive the cutting drive mechanism away from the end effector 1.

Fig. 10A is a structural diagram of the cartridge assembly 11 and the cutting drive mechanism. Referring to fig. 10A and 2, the end effector 1 includes a first end and a second end that are axially opposite to each other, the first end being adjacent to the closing mechanism, i.e., the sleeve 2. Before the staple pushing stage, the cutting device is positioned at the first end; in the stapling stage, the first drive mechanism 10 is moved axially towards the end effector 1 to drive the cutting drive mechanism to move towards the end effector 1 in synchronism with the stapling slide 60, the cutting drive mechanism driving the cutting device from the first end to the second end, but in the stapling stage, the cutting blade 605 is located at least partially in the stapling slide 60, the cutting blade 605 having a predetermined distance from the target tissue clamped between the cartridge assembly 11 and the anvil 12 such that the cutting blade 605 does not contact the target tissue. During the cutting phase, the first drive mechanism 10 is moved axially away from the end effector 1 to drive the cutting drive mechanism away from the end effector 1, which drives the cutting device from the second end to the first end and cuts the target tissue.

FIG. 10B is a top view of the stapler 100 of FIG. 10A in an anvil orientation; FIG. 10C is a top view of stapler 100 of FIG. 10A in the cartridge direction; FIG. 10D is a schematic cross-sectional view taken along the line J-J in FIG. 10C; FIG. 10E is a schematic cross-sectional view taken along line H-H in FIG. 10B; FIG. 12E is a schematic illustration of the connection of the cutting drive mechanism and the pusher sled coupled to each other; fig. 13C is a schematic view of the staple pusher sled 60 carrying the cutting blade 605 from a first end of the end effector 1 to a second end of the end effector 1. Referring to fig. 10B-10E, 12E and 13C, cartridge assembly 11 includes a cartridge 500 and an outer frame 400. Staples are arranged in the staple cartridge 500; outer housing 400 is secured to cartridge 500 and has first and second portions that are opposite each other; the first and second portions are located on a side of the staple cartridge remote from anvil 12 and each extend in an axial direction, and first portion 401 of outer frame 400 and second portion 402 of outer frame 400 are spaced apart from each other to define first axially extending slide slots 41, the first portion of outer frame 400 and the second portion of outer frame 400 each having an upper surface remote from staple cartridge 500 and a lower surface opposite the upper surface. The staple driving mechanism 40 includes a main body portion 411 and a first sliding portion 412. During the movement of the staple pushing slider 60 driven by the staple pushing driving mechanism 40, the main body 411 is configured to be connected to the staple carrying member, i.e. the staple pushing slider 60, and the first end of the main body 411, which is far away from the anvil 12, slides in the first chute 41. The first sliding portion 412 is connected to the body portion 411, supported on the upper surface of the first portion of the outer bracket 400 and the upper surface of the second portion of the outer bracket 400, and is configured to be slidable along the upper surface of the first portion of the outer bracket 400 and the upper surface of the second portion of the outer bracket 400. In this way, the setting of the nail-pushing driving mechanism 40 on the nail cartridge is realized, and the outer bracket 400 can ensure that the nail-pushing driving mechanism 40 stably moves in the nail-pushing stage, so that the nail-pushing driving mechanism 40 can not be acted by the nail anvil 12 in the nail-pushing stage, and the nail-pushing driving mechanism 40, namely the cutting driving mechanism, can have a preset distance from the target tissue clamped between the nail cartridge and the nail anvil 12, so that the cutting knife 605 does not contact the target tissue.

For example, as shown in fig. 13C, the cartridge includes a cartridge holder including axially extending first and second portions 511, 512, the cartridge holder first and second portions 511, 512 each including a slot for receiving a staple and defining an axially extending second channel 42, the second channel 42 being opposite the first channel 41, and a second end of the body portion 411 of the staple driving mechanism 40 adjacent the anvil 12 sliding in the second channel 42 during movement of the staple driving mechanism 40 to drive the staple pusher sled 60.

For example, the staple cartridge has a staple ejection face opposed to the anvil 12, and the entire body 411 of the staple pusher driving mechanism 40 and the first sliding portion 412 has a T-shaped cross section in a direction perpendicular to the staple ejection face. Thus, unlike the "I" shaped staple pusher 40 (cutting driver), the T-shaped staple pusher 40 is disposed on the staple cartridge, and the T-shaped staple pusher is positioned near one end of the anvil 12, i.e., near one end of the target tissue, and can be spaced apart from the target tissue by a predetermined distance during the staple pushing stage so that the cutting blade 605 does not contact the target tissue, thereby achieving a cut of the target tissue after the entire target tissue has been stapled, which is more advantageous for the flatness and accuracy of the stapling of the target tissue, and the accuracy of the cut.

For example, the staple driving mechanism 40 further includes a second sliding portion 413, the second sliding portion 413 being connected to the main body 411, being located at a side of the first and second portions remote from the first sliding portion 412, being in contact with and configured to be slidable along the lower surfaces of the first and second portions.

Fig. 13A is a schematic view of a stapling process. As shown in fig. 12A and 13A, the staple pusher plates 700 are axially aligned and configured to apply pressure to the staples to eject the staples from the staple cartridge; the ejector pin sled 60 is configured to apply pressure to the ejector pin blade 700 to drive the ejector pin blade 700 to apply ejector pin pressure to the staples; the staple pushing drive mechanism 40 is configured to drive the staple pushing sled 60 axially during the staple pushing stage under the drive of the first drive mechanism 10 such that the staple pushing sled 60 axially contacts the staple pushing blade 700 in turn to apply staple pushing pressure to the staple pushing blade 700.

As shown in fig. 12A, for example, the ejector pin slider 60 includes a main body portion and an ejector pin runner 601. The ejector pin chute 601 is located on the main body of the ejector pin sled 60 and on the side of the main body of the ejector pin sled 60 facing the anvil 12, is configured to receive the ejector pin blade 700 during the ejector pin stage of the axial movement of the ejector pin sled 60, and includes a bottom surface facing the anvil 12, wherein the bottom surface is configured to apply an ejector pin pressure to the ejector pin blade 700 during the ejector pin stage.

As shown in fig. 12A, for example, the staple pusher 60 includes a receiving cavity 600 with a cutting blade 605 at least partially disposed within the receiving cavity 600. The nail pushing sliding block 60 comprises a first nail pushing sliding groove 601 and a second nail pushing sliding groove 601, wherein the staples pushed out by the first nail pushing sliding groove 601 enter the nail grooves of the first part of the nail cartridge bracket, and the staples pushed out by the second nail pushing sliding groove 601 enter the nail grooves of the second part of the nail cartridge bracket; the accommodating cavity 600 is located between the first push pin sliding groove 601 and the second push pin sliding groove 601, so that the wall of the accommodating cavity 600 can be used for forming the push pin sliding groove 601 at the same time, and the limited space of the push pin sliding block 60 is fully utilized, so that the push pin sliding groove has the functions of carrying the cutting knife 605 and having a plurality of push pin sliding grooves 601.

Fig. 12A is a schematic overall structure of the staple pusher 60 carrying the cutter 605; fig. 12B is a schematic cross-sectional view of the pusher shoe 60 carrying the cutting blade 605. As shown in fig. 12A-12B, for example, the staple pusher sled 60, i.e., the knife carrying member, includes a receiving cavity 600, a limiting structure, and a knife out drive structure 602. The cutting blade 605 is at least partially located within the receiving cavity 600 and includes a blade 6050; the limiting structure is configured to movably connect the cutter 605 to the staple pushing slide 60; FIG. 13B is a schematic view of the cutting blade not contacting the target tissue during the stapling stage, as shown in FIG. 13B, for example, the receiving cavity 600 has an inner wall, the inner wall includes a plurality of intersecting wall surfaces 621/622, and the plurality of wall surfaces 621/622 form a limiting structure; in the nailing stage, the cutting knife 605 is clamped at a fixed position by a plurality of wall surfaces; the static friction force applied by the plurality of walls to the cutter 605 balances the gravity of the cutter to fix the cutter 605.

For example, the plurality of wall surfaces includes a first wall surface 621 and a second wall surface 622 opposite to each other, the first wall surface 621 and the second wall surface 622 intersecting the opening and each intersecting the axial direction; under the first driving force, the cutter 605 slides along the first wall surface 621 and the second wall surface 622 to be exposed from the opening. The exiting blade drive structure 602 is configured to apply a first drive force to the cutting blade 605 to move the blade edge 6050 toward the target tissue to contact the target tissue. The receiving cavity 600 includes an opening toward the target tissue, and the cutting blade 605 is configured to be at least partially exposed from the opening by a first driving force to bring the blade 6050 into contact with the target tissue.

For example, the first wall and the second wall are perpendicular to the axial direction to facilitate sliding of the subsequent cutting blade 605 along the first wall and the second wall toward the target tissue.

Fig. 11A-11B are schematic views of the attachment of the staple pusher drive mechanism 40 and the staple pusher sled 60 to each other. As shown in fig. 11A-11B, for example, prior to stapling, the staple pusher drive mechanism 40 is coupled to the second drive mechanism 20, moves into contact with the staple pusher sled 60 as the second drive mechanism 20 moves, and is coupled to the staple pusher sled 60. FIG. 12C is a schematic view of the end of the staple pusher sled 60 adjacent the cutting drive mechanism; fig. 12E is a schematic view of the connection of the cutting drive mechanism and the pusher sled 60 to each other. 12C-12E, the staple pusher sled 60, i.e., the knife carrier assembly, further includes a first attachment structure and the main body portion of the staple pusher drive mechanism 40 includes a second attachment structure. In the nailing stage, the first connecting structure is not connected with the second connecting structure; after the stapling stage and before the cutting stage, the first connection structure is connected with the second connection structure. For example, the body portion of the staple driving mechanism 40 further includes a force application surface 641 facing the knife carrier, and the staple pusher sled 60 includes a force receiving surface 642 facing the body portion. In the staple pushing stage, the cutting driving mechanism moves toward the cutter carrying member to bring the force application surface 641 into contact with the force receiving surface 642, and the staple pushing driving mechanism 40 applies a second driving force to the force receiving surface 642 through the force application surface 641 to drive the cutter carrying member to move.

For example, in the present embodiment, the first connection structure multiplexes the knife-out driving structure 602, and the knife-out driving structure 602 is at least partially located within the accommodation chamber 600 and is configured to be movable in the axial direction; the knife out drive structure 602 extends axially and includes a first end axially adjacent the cutting drive mechanism and a second end opposite the first end; the push pin slider 60 includes a through hole penetrating the force receiving surface 642 and communicating with the accommodating chamber 600; during the stapling stage, a first end of the ejection driving structure 602 is positioned within the receiving cavity 600, a second end of the ejection driving structure 602 extends outside the receiving cavity 600, and the ejection driving structure 602 does not move axially relative to the cutting blade 605. FIG. 13B is a schematic view of the cutting burr in the staple pushing stage when it is not in contact with the target tissue; fig. 13D is a schematic view of the knife moving into contact with the target tissue during the stapling stage. 12C-12E and 13C, 13D, for example, the cartridge housing includes a resistive surface 503, the resistive surface 503 facing the ejection drive structure 602, the ejection drive structure 602 configured to strike the resistive surface 503 when the cutting device reaches the second end of the end effector 1 under the drive of the cutting drive mechanism such that the resistive surface 503 applies an ejection drive force to the ejection drive structure 602, the ejection drive structure 602 configured to contact the cutting blade 605 under the action of the ejection drive force to apply a first drive force to the cutting blade 605 to drive the cutting blade 605 toward the target tissue. For example, as shown in fig. 13B, when the cutting device reaches the second end of the end effector 1, the second end of the exiting blade driving structure 602 hits the resistive surface 503, so that the resistive surface 503 applies an exiting blade driving force to the exiting blade driving structure 602, the exiting blade driving structure 602 moves away from the second end of the end effector 1 in the axial direction under the action of the exiting blade driving force to contact the cutting blade 605 to apply a first driving force to the cutting blade 605 to drive the cutting blade 605 to move toward the target tissue, and the first end of the exiting blade driving structure 602 moves outside the accommodating chamber 600 through the through hole 603 to be connected with the second connecting structure, that is, the state shown in fig. 13B is changed to the state shown in fig. 13D.

In the stapling stage, the blade 6050 of the cutter 605 is oriented toward the target tissue, the cutter 605 further includes a first bevel 606 intersecting the blade 6050, the ejection drive structure 602 includes a second bevel 607, the second bevel 607 is located on a side of the first bevel 606 remote from the blade 6050 and axially on a side of the first bevel 606 proximate to the second end of the end effector 1 and parallel to the first bevel 606, the first bevel 606 and the second bevel 607 each intersecting the axial direction; when the second end of the out-blade driving structure 602 hits the resistive surface 503, the out-blade driving structure 602 is configured to move axially away from the second end of the end effector 1 under the action of the out-blade driving force to bring the second bevel 607 into contact with the first bevel 606 of the cutting blade 605 to apply a first driving force to the cutting blade 605, the cutting blade 605 moves toward the target tissue and the first bevel 606 slides relative to the second bevel 607 toward a direction approaching the target tissue while the out-blade driving structure 602 moves axially away from the second end of the end effector 1. In this way, the knife-out driving structure 602 can be ensured to be smoothly connected with the second connecting structure, running stability is ensured, the limited space of the accommodating cavity 600 is fully utilized, space is saved, miniaturization of the anastomat 100 is facilitated, the radial size of the anastomat 100 is reduced as much as possible, and the knife-out driving structure is easy to enter an operation object such as a human body in the operation process, so that injury of the operation object is reduced.

For example, the second bevel 607 may be angled at an obtuse angle relative to the second end of the end effector 1 axially adjacent to the second bevel 607 to facilitate sliding of the first bevel 606 along the second bevel 607.

As shown in fig. 12D-12E, the main body of the cutting driving mechanism includes a hollow area, the hollow area penetrates through the force application surface 641 to make the force application surface 641 have a via 415, the second connection structure is located in the hollow area, and the second end of the knife driving structure 602 passes through the via and enters the hollow area to be connected with the second connection structure.

12C-12E, for example, the second connecting structure includes an elastic connecting member protruding from an inner wall of the hollowed out area facing the second end of the exiting knife driving structure 602; the second end of the knife out drive structure 602 has a nested aperture 604. The elastic connection member includes an elastic connection rod 610 and an end protrusion 613; the elastic connecting rod 610 protrudes from the inner wall of the hollowed-out area facing the second end of the cutter-out driving structure 602 and extends along the axial direction; the end protrusion 613 is located at one end of the elastic connecting rod 610 away from the inner wall and protrudes from the elastic connecting rod 610 in a second direction perpendicular to the axial direction; the end projection 613 nests within the nest aperture 604 to connect the second end of the knife driving structure 602 with the resilient connector.

As shown in fig. 12E, for example, the end surface of the end portion protrusion 613 protruding from the elastic connecting rod 610 is an arc surface 614, and the knife driving structure 602 and the elastic connecting member are configured as follows: when the exiting driving structure 602 moves away from the second end of the end effector 1 in the axial direction and reaches the end protrusion 613 under the action of the exiting driving force, the second end of the exiting driving structure 602 abuts against the arc surface to elastically deform the elastic connecting rod 610 in the second direction, and when the exiting driving structure 602 continues to move away from the second end of the end effector 1 in the axial direction and makes the nesting hole 604 face the end protrusion 613 under the action of the exiting driving force, the end protrusion 613 moves toward the nesting hole 604 in the second direction and is embedded in the nesting hole 604 under the action of the elastic restoring force of the elastic connecting rod 610 to connect the push pin driving mechanism 40 (i.e., the cutting driving mechanism) with the push pin slider 60 (i.e., the knife carrying member). This design can make full use of this part of play sword drive structure 602, when realizing that drive cutting knife 605 exposes in order to cut target tissue, can also be connected with push away nail actuating mechanism 40 fast to prepare for the cutting of the removal of following cutting stage drive cutting knife 605, and simple structure easily realizes to practice thrift the space.

For example, the arcuate surface 614 is a spherical cap surface and the nesting hole 604 is substantially circular to facilitate entry of the end projection 613 into the nesting hole 604 to enable connection of the second end of the knife driving structure 602 to a resilient connector, increasing reliability of the device.

Of course, in other embodiments, the second end of the knife driving structure 602 may be connected by other hanging connection, or by clamping connection, or by magnetic connection, which is not limited in the embodiments of the disclosure, so long as the above-mentioned effects can be achieved.

For example, in the stapler 100 provided in at least one other embodiment, the staple pushing sled, i.e., the knife carrying member, includes a first connection structure, and the main body portion of the cutting drive mechanism includes a second connection structure; at least in the staple pushing stage and the cutting stage, the first connecting structure is connected with the second connecting structure so that the staple pushing driving mechanism, namely the cutting driving mechanism, is connected with the staple pushing sliding block. That is, the nail pushing driving mechanism is connected with the nail pushing sliding block in the nail pushing stage. And, for example, the first connection structure includes a first connection end proximate the cutting drive mechanism and the second connection structure includes a second connection end proximate the first connection structure. Before the staple pushing stage, the staple pushing driving mechanism (namely the cutting driving mechanism) is not connected with the cutter carrying part; in the staple pushing stage, the staple pushing driving mechanism moves towards the staple pushing sliding block (namely the cutter carrying component) under the driving of the first driving mechanism and the second driving mechanism so as to connect the first connecting end with the second connecting end. For example, the body portion of the staple driving mechanism further comprises a force application surface facing the cutter carrying member, the cutter carrying member comprising a force receiving surface facing the body portion; in the nail pushing stage, the cutting driving mechanism moves towards the cutter carrying component to enable the force application surface to be in contact with the force bearing surface, the first connecting end is connected with the second connecting end, the cutting driving mechanism applies second driving force to the force bearing surface through the force application surface, and applies third driving force to the first connecting structure through the second connecting structure to drive the cutter carrying component to move. In this embodiment, the position of the end projection may be interchanged with the position of the nest bore. For example, the main body of the cutting driving mechanism includes a hollow area, the hollow area penetrates through the force application surface to enable the force application surface to have a via hole, the second connecting structure is located in the hollow area, and the first connecting end penetrates through the via hole to enter the hollow area to be connected with the second connecting end of the second connecting structure. For example, the second connecting structure comprises an elastic connecting piece, and the elastic connecting piece protrudes from the inner wall of the hollowed-out area facing the first connecting end; one end of the elastic connecting piece far away from the inner wall is a second connecting end, and the second connecting end is provided with a nested hole. The elastic connector includes: an elastic connecting rod and an end protrusion; the elastic connecting rod protrudes from the inner wall of the hollowed-out area facing the first connecting end and extends along the axial direction; the end part protrusion is positioned at one end of the elastic connecting rod far away from the inner wall and protrudes out of the elastic connecting rod along a second direction perpendicular to the axial direction; the end protrusion is nested within the nesting hole to connect the second end of the knife driving structure with the resilient connecting member. For example, the end face of the end portion protrusion protruding from the elastic connection rod is an arc-shaped face, and the cutting drive mechanism and the elastic connection member are configured to: when the cutting driving mechanism moves towards the second end of the end effector along the axial direction to reach the first connecting end, the first connecting end abuts against the arc-shaped surface to enable the elastic connecting rod to elastically deform in the second direction, and when the cutting driving mechanism continues to move towards the second end of the end effector along the axial direction to enable the nesting hole to be opposite to the end protrusion under the driving of the first driving mechanism, the end protrusion moves towards the nesting hole along the second direction under the action of elastic restoring force of the elastic connecting rod and is embedded into the nesting hole to enable the first connecting end and the second connecting end to be connected. The second connecting structure comprises an elastic connecting piece, and the elastic connecting piece protrudes from the inner wall of the hollowed-out area facing the second end of the cutter outlet driving structure and extends along the axial direction; one end of the elastic connecting piece far away from the inner wall is a second connecting end, and the second connecting end is provided with a nested hole. The second end of the cutter-out driving structure is provided with an end protrusion, and the end protrusion protrudes out of the second end of the cutter-out driving structure along a second direction perpendicular to the axial direction; the end protrusion is nested within the nesting hole to connect the second end of the knife driving structure with the resilient connecting member. The end face of the end part protrusion protruding out of the second end of the cutter outlet driving structure is an arc-shaped face, and the cutter outlet driving structure and the elastic connecting piece are constructed as follows: when the cutter-out driving structure moves away from the second end of the end effector along the axial direction under the action of the cutter-out driving force so that the elastic connecting piece reaches the protrusion of the end portion, the elastic connecting piece abuts against the arc-shaped surface to enable the elastic connecting piece to elastically deform in the second direction, and when the cutter-out driving structure continues to move away from the second end of the end effector along the axial direction under the action of the cutter-out driving force so that the nesting hole is opposite to the protrusion of the end portion, the elastic connecting piece moves towards the nesting hole along the second direction under the action of the elastic restoring force of the elastic connecting rod so that the protrusion of the end portion is embedded into the nesting hole to enable the cutting driving mechanism to be connected with the cutter-carrying component. For example, the arcuate surface is a spherical cap surface and the nesting holes are substantially circular. This embodiment achieves similar technical effects as the embodiment shown in fig. 12C-12E.

In at least one embodiment of the present disclosure, in the initial state, the end effector 1 is in an open state; in the closing phase, the closing mechanism is configured to drive the cartridge assembly 11 and anvil 12 into apposition to close the end effector 1 to clamp the target tissue; in a staple ejection phase subsequent to the closure phase, the staple ejection assembly is configured to eject staples from cartridge assembly 11 to staple target tissue. For example, stapler 100 further comprises a locking mechanism 5, locking mechanism 5 being configured to define the closing mechanism in a first position during the stapling phase so as to maintain the closing mechanism in the closed state of end effector 1, and to define the closing mechanism in a second position in the initial state so as to maintain end effector 1 in the open state, in order to achieve the technical effect of a bi-directional locking, preventing tissue slippage due to movement of the closing mechanism after end effector 1 is closed; in addition, the end effector 1 is prevented from being closed by the movement of the closing mechanism in the initial state, thereby improving the operational stability and reliability of the closing mechanism.

Fig. 6A-6C illustrate the structure of the locking mechanism 5 and the operation of the locking mechanism 5 during closing of the end effector 1 by a closing mechanism, in accordance with an embodiment of the present disclosure. With reference to fig. 1 and 6A-6C, the locking mechanism 5 includes a first limit structure and a second limit structure. The first limiting structure is configured to limit the closing mechanism to a first position in the staple pushing stage; the second limiting structure is configured to limit the closing mechanism to a second position in an initial state. The first and second stopper structures may be in any form as long as the above object can be achieved, and are not limited to those described in the above embodiments, which are not limited by the present disclosure.

For example, as shown in fig. 8, the stapler 100 further includes a first elastic member 71, the first elastic member 71 being connected with the closing mechanism. In the closing phase, the closing mechanism moves towards the end effector 1 to close the end effector 1 and elastically deform the first elastic member 71; in the stapling stage, the first elastic member 71, which is elastically deformed, applies a first resistance to the closing mechanism under the action of its elastic restoring force, which resists the closing mechanism from moving toward the end effector 1, and the first limiting structure is configured to apply a second resistance to the closing mechanism opposite to the first resistance, the first resistance being balanced with the second resistance to limit the closing mechanism to the first position; in the initial state, when the closing mechanism is subjected to a driving force driving the closing mechanism to deviate from the second position, the second limiting structure is configured to apply a third resistance to the closing mechanism to balance with the driving force so as to limit the closing mechanism to the second position.

The first limiting structure includes a first limiting groove 51 and a first locking member. The first limit groove 51 has a first side wall, is positioned on the closing mechanism and is configured to move along with the movement of the closing mechanism; at least a portion of the first end 501 of the first locking member is captured in the first limiting groove 51 and contacts the first sidewall during the stapling stage to apply a fourth resistance to the first sidewall, thereby applying a second resistance to the closure mechanism through the first limiting groove 51, the fourth resistance being equal in magnitude and in the same direction as the second resistance. The second limiting structure includes a second limiting groove 52 and a second locking member. The second limiting groove 52 has a second side wall located on the closing mechanism and configured to move with movement of the closing mechanism. In the initial state, at least part of the first end 501 of the second locking member is confined in the second limiting groove 52 and is configured to be contactable with the second side wall to apply a fifth resistance to the second side wall, thereby applying a third resistance to the closure mechanism through the second limiting groove 52, the fifth resistance being equal in magnitude to the third resistance and both being in the same direction as the first resistance. For example, in the present embodiment, the closing mechanism is a hollow sleeve 2, and the first limiting groove 51 and the second limiting groove 52 penetrate through the wall of the sleeve 2. Thus, the locking mechanism 5 does not protrude from the sleeve 2, bidirectional locking of the sleeve 2 is realized by using the sleeve 2 and the inner space of the sleeve 2, the limited space inside the sleeve 2 is fully utilized, and the problem that the locking mechanism is easy to enter an operation object such as a human body in the operation process is prevented, so that the contusion of the operation object is reduced.

As shown in fig. 6A-6C, for example, in some embodiments, the first locking member and the second locking member are the same common locking member 50. In the closing phase, the first and second limit slots 51, 52 move relative to the common locking member 50 to configure the common locking member 50 to move from the second limit slot 52 to the first limit slot 51; when the first end 501 of the common lock member 50 is at least partially retained in the first retaining groove 51, the common lock member 50 and the first retaining groove 51 constitute a first lock member; when the first end 501 of the common lock member 50 is at least partially retained in the second retaining groove 52, the common lock member 50 and the second retaining groove 52 constitute a second lock member. The common locking member 50 simplifies the structure of the locking mechanism 5, saving space and facilitating miniaturization of the stapler 100.

For example, the movement directions of the sleeve 2, the first limiting groove 51 and the second limiting groove 52 are axial, and the first limiting groove 51 is located at a side of the second limiting groove 52 away from the end effector 1 along the axial direction, so as to realize the above-mentioned function of the first limiting groove 51.

As shown in fig. 6A to 6C, the lock mechanism 5 further includes a passage groove 53, and the passage groove 53 is located between the first limit groove 51 and the second limit groove 52 and communicates with the first limit groove 51 and the second limit groove 52. In the closing phase, the common locking member 50 is configured to move from the second limit slot 52 to the first limit slot 51 via the passage slot 53. The channel groove 53 penetrates the wall of the sleeve 2.

For example, the common locking member 50 further includes a second end 502 opposite the first end 501, and a neck 503 connecting the first end 501 and the second end 502; the channel 53 is configured to allow the neck 503 to pass therethrough without allowing the first end 501 to pass therethrough such that in an initial state, the first end 501 cannot pass through the channel 53 and is at least partially restrained within the second restraint slot 52, and in a staple ejection stage, the first end 501 cannot pass through the channel 53 and is at least partially restrained within the first restraint slot 51. The direction from the first end 501 to the second end 502 is longitudinal, the longitudinal direction is perpendicular to the axial direction, and the directions perpendicular to the axial direction and the longitudinal direction are transverse. For example, the width of the passage groove 53 in the lateral direction is smaller than the width of the first limit groove 51 in the lateral direction and smaller than the width of the second limit groove 52 in the lateral direction; the width of the first end portion 501 in the lateral direction is larger than the width of the neck portion 503 in the lateral direction and larger than the width of the channel groove 53 in the lateral direction so that the channel groove 53 allows the neck portion 503 to pass therethrough without allowing the first end portion 501 to pass therethrough such that in an initial state, the first end portion 501 cannot pass through the channel groove 53 and is at least partially restrained within the second restraining groove 52, and in a staple pushing stage, the first end portion 501 cannot pass through the channel groove 53 and is at least partially restrained within the first restraining groove 51.

For example, in at least one embodiment of the present disclosure, the locking mechanism further comprises a locking drive structure. In the closing phase, the locking driving structure is configured to drive the common locking member to move along the longitudinal direction towards the direction far away from the second end part so as to enable the first end part to move out of the second limit groove, and along with the movement of the first limit groove and the second limit groove, the neck part is configured to move from the second limit groove to the first limit groove through the channel groove; after the end effector is closed, the lock drive structure is configured to drive the common lock member to move longitudinally toward a direction proximate the second end such that at least a portion of the first end moves into the first limit slot to be retained within the first limit slot, at least a portion of the first end contacting the first sidewall to apply a fourth resistance to the first sidewall.

As shown in fig. 6A-6C, for example, the stapler 100 includes a fixing frame 8, and the sleeve 2 is sleeved outside the fixing frame 8, and the first limit groove 51, the second limit groove 52 and the channel groove 53 expose the outer surface of the fixing frame 8. The fixing bracket 8 includes a through hole penetrating the outer surface, and when at least part of the first end 501 of the common locking member 5 is caught in the first catching groove 51 or caught in the second catching groove 52, at least part of the neck 503 and the second end 502 are located in the through hole. For example, the first end 501 includes a lower surface facing the fixing bracket 8, and when at least part of the first end 501 of the common locking member 5 is restrained within the first restraining groove 51 or within the second restraining groove 52, an outer surface of the fixing bracket 8 is in direct contact with the lower surface of the first end 501 to support the first end 501. The common locking member 50 and the through hole form a latch structure.

For example, at least a portion of the first end 501 has a length in the axial direction that is less than the length of the first limiting groove 51 in the axial direction to allow a margin such that the first limiting groove 51 allows at least a portion of the first end 501 to move within the first limiting groove 51 within the margin to adjust position to provide a cushioning effect when grasping tissue during the closing phase.

For example, the first sidewall may have a first arc shape, and at least a portion of the side of the first end 501 contacting the first sidewall may have a second arc shape, and the first and second arcs may have the same curvature, thereby improving stability and reliability of the locking member.

For example, the planar shape of the passage groove 53 is a straight bar shape to ensure that the common lock member 50 moves between the first and second stopper grooves 51 and 52 while smoothly passing through the passage groove 53.

6A-6C, for example, the lock drive structure includes a bearing surface facing the common lock member 50; the bearing surface comprises a first surface 01, a first slope 02, a protruding surface 03, a second slope 04 and a second surface 05 which are sequentially arranged along the axial direction, the first slope 02 is connected with the first surface 01 and the protruding surface, the second slope 04 is connected with the protruding surface and the second surface 05, a first included angle is formed between the first slope 02 and the protruding surface, and a second included angle is formed between the second slope 04 and the protruding surface; in the longitudinal direction, the distance from the protruding surface to the second limit groove 52 is smaller than the distance from the first surface 01 to the second limit groove 52 and smaller than the distance from the second surface 05 to the second limit groove 52, the distance from the protruding surface to the passage groove 53 is smaller than the distance from the first surface 01 to the passage groove 53 and smaller than the distance from the second surface 05 to the passage groove 53, and the distance from the protruding surface to the first limit groove 51 is smaller than the distance from the first surface 01 to the first limit groove 51 and smaller than the distance from the second surface 05 to the first limit groove 51. As shown in fig. 6A, in the initial state, the second end 502 is located on the side of the first slope 02 remote from the second slope 04; as in fig. 6B, during the closing phase, the lock drive structure is configured to move axially relative to the common lock member 50 to move the second end 502 along the first ramp 02 to the protruding surface to drive the common lock member 50 longitudinally away from the second end 502, which in turn moves the second end 502 along the protruding surface and the second ramp 04 to a side of the second ramp 04 away from the first ramp 02, as in fig. 6C, to move the common lock member 50 longitudinally toward a direction closer to the second end 502. In the closing phase, the movement of the locking drive structure relative to the common locking member 50 is synchronized with the movement of the first and second limit slots 51, 52 relative to the common locking member 50 such that during movement of the second end 502 relative to the locking drive structure, the neck 503 moves from the second limit slot 52 into the first limit slot 51 via the channel slot 53, as shown in fig. 6C; at this point, at least a portion of the first end 501 contacts a first portion of the first sidewall proximate the channel 53 to apply a fourth resistance to the first portion 511 of the first sidewall, the first portion 511 of the first sidewall facing away from the end effector 1.

For example, in the embodiment shown in fig. 6A-6C, the fixed bracket 8 and the common locking member 50 do not move in the axial direction, and the lock driving structure moves in the axial direction to ensure the stability of the fixed bracket 8 and the common locking member 50.

The first drive mechanism 10 of the stapler 100 is connected to the second drive mechanism 20 and is configured to drive the second drive mechanism to move; in the closing phase, the second drive mechanism 20 is detachably connected to the closing mechanism and is configured to move toward the end effector 1 under the drive of the first drive mechanism 10 such that the closing mechanism contacts the cartridge assembly 11 and anvil 12 and applies pressure to the cartridge assembly 11 and anvil 12 to close the end effector 1. For example, the lock drive structure is provided on the second drive mechanism 20. For example, in the embodiment shown in fig. 6A-6C, a portion of second drive mechanism 20 is multiplexed as a locking drive structure to fully utilize second drive mechanism 20 and simplify the construction of stapler 100.

During the staple ejection phase, the second drive mechanism 20 is disengaged from the closure mechanism and continues to move toward the end effector 1 to drive the staple ejection assembly to eject the staples from the cartridge assembly 11. As shown in fig. 6C, the first surface 01 is located at an end of the second surface 05 near the end effector 1, and during the closing phase, the first end 501 moves from the second limit slot 52 to the first limit slot 51 during movement of the second end 502 relative to the lock drive structure; during the stapling and cutting phases, the second end 502 moves over the second surface 05 and the second surface 05 is configured so as not to apply a force to the second end 502 that drives the common locking structure to move in the longitudinal direction, i.e. no boss or the like on the second surface 05 is able to drive the common locking structure to move in the longitudinal direction upwards, thereby achieving that the locking of the sleeve 2 is maintained during both the stapling and cutting phases, so as to ensure the position of the target tissue to be fixed, thereby ensuring the accuracy of stapling and cutting.

For example, as shown in fig. 6A to 6C, the locking mechanism 5 further includes a second elastic member 72, the second elastic member 72 being configured to be compressed during movement of the common locking member 50 in the longitudinal direction toward the direction away from the second end 502, and to be restored under the elastic restoring force thereof during movement of the common locking member 50 in the longitudinal direction toward the second end 502, so as to ensure that the common locking member 50 can be quickly moved in the longitudinal direction toward the second end 502 back into the through hole, thereby ensuring reliability of operation of the locking mechanism 5.

The properties and materials of the second elastic member 72 may be referred to the properties and materials of the first elastic member 71 described above. For example, the second elastic member 72 may be a spring, for example, the second elastic member 72 may be sleeved on the neck 503 and deformed by being forced by the fixing bracket 8, for example, compressed.

For example, as shown in fig. 6A-6C, the second end 502 of the common locking member 50 is tapered in the longitudinal direction toward the bearing surface, so that when the second end 502 slides along the first slope 02, the contact area of the second end 502 with the first slope 02 is reduced, so that the second end 502 moves relatively easily to the protruding surface; in addition, when the second end 502 slides along the protruding surface, the second slope 04 and the second surface 05, the contact area between the second end 502 and the protruding surface, the second slope 04 and the second surface 05 is reduced, which is beneficial to smooth sliding.

For example, the first ramp 02 and the second ramp 04 are planar or curved, preferably planar, which is relatively easy to achieve, in particular to achieve sliding of the second end 502 along the first ramp 02 to the protruding surface. Of course, the embodiments of the present disclosure do not limit the shape of the first slope 02 and the second slope 04.

For example, with respect to the stapler 100 provided by at least one embodiment of the present disclosure, during an opening phase following a stapling phase, the locking mechanism 5 is further configured to eliminate the definition of the position of the closing mechanism so that the end effector 1 is opened. For example, the removal of the limit on the position of the closing mechanism to open the end effector 1 can be accomplished at any time by manual control; for example, the opening phase requires opening the end effector 1 to adjust the position of the clamped target tissue prior to suturing, e.g., prior to suturing the tissue; the end effector 1 may also be opened after suturing and cutting, although it is possible to open the end effector 1 after suturing is completed but before cutting is performed, for example, in some special cases where it is necessary to open the end effector 1 before cutting for adjustment.

In an opening phase subsequent to the stapling phase, the first stop structure is configured to eliminate the second resistance force, and the closure mechanism is moved away from the end effector 1 by the first resistance force to move the cartridge assembly 11 and anvil 12 away from each other to open the end effector 1. In the opening stage, the common lock member 50 is configured to move from the first limit groove 51 to the second limit groove 52 to return to the original state.

For example, in the embodiment shown in fig. 6A-6C, during the open phase, the common locking member 50 is configured to move from the first limit slot 51 to the second limit slot 52 via the channel slot 53. In the opening phase, the lock driving structure is further configured to drive the common lock member 50 to move in the longitudinal direction toward a direction away from the second end 502 to move the first end 501 out of the first limit groove 51, and with the movement of the first limit groove 51 and the second limit groove 52, the neck 503 is configured to move from the second limit groove 52 to the first limit groove 51 via the passage groove 53.

In the embodiment shown in fig. 6A-6C, in the open phase, the lock drive structure is configured to move axially relative to the common lock member 50 to move the second end 502 along the second ramp 04 to the protruding surface to drive the common lock member 50 longitudinally away from the second end 502, which in turn moves the second end 502 along the protruding surface and the first ramp 02 to a side of the first ramp 02 away from the second ramp 04 to move the common lock member 50 longitudinally toward a direction closer to the second end 502; in the opening phase, the movement of the lock drive structure relative to the common lock member 50 is synchronized with the movement of the first and second limit slots 51, 52 relative to the common lock member 50 such that the neck 503 moves from the first limit slot 51 into the second limit slot 52 via the channel slot 53 during the movement of the second end 502 relative to the lock drive structure.

For example, as shown in fig. 8, the first elastic member 71 is located at an end of the locking mechanism 5 near the end effector 1 and is compressed as the closing mechanism moves toward the end effector 1; alternatively, in other embodiments, the first resilient member 71 is located at an end of the locking mechanism 5 remote from the end effector 1 and is stretched as the closure mechanism moves toward the end effector 1.

For example, as shown in fig. 6A to 6C, the first limiting groove 51, the second limiting groove 52 and the passage groove 53 are provided opposite to the connection hole 23 to relatively uniformly and sufficiently utilize the space inside the sleeve 2.

Fig. 14A is a schematic view of a forward swing driving assembly of a stapler 100 according to an embodiment of the present disclosure; fig. 14B is a schematic diagram of a forward swing driving assembly of the stapler 100 according to an embodiment of the disclosure. In connection with fig. 2 and 14A-14B, for example, at least one embodiment provides a stapler 100 including an end effector 1, a closure mechanism, a staple pusher assembly, a first drive mechanism 10, and a swing mechanism. The end effector 1 comprises a nail bin assembly 11 and a nail anvil 12, wherein the nail bin assembly 11 is provided with anastomotic nails; the closing mechanism is configured to drive the cartridge assembly 11 and anvil 12 into apposition to close the end effector 1 to clamp the target tissue; the staple pushing assembly is configured to push staples out of cartridge assembly 11; the first driving mechanism 10 is configured to: in the closing phase, the first driving mechanism 10 is detachably connected with the closing mechanism to drive the closing mechanism to close the end effector 1; in a staple pushing stage following the closing stage, the first drive mechanism 10 is disengaged from the closing mechanism and drives the staple pushing assembly to push staples out of the cartridge assembly 11 to staple the target tissue. The swing mechanism comprises a front swing driving assembly and a rear swing driving assembly. The front swing drive assembly and the rear swing drive assembly are configured to drive the end effector 1 to swing. As shown in fig. 1A, stapler 100 comprises a main body portion 4 and a detachable portion 3, detachable portion 3 being detachably connected to main body portion 4; the end effector 1 and the front swing drive assembly are located in the detachable portion 3, and the first drive mechanism 10 and the rear swing drive assembly are located in the main body portion 4; as shown in fig. 1A and 15A, the detachable portion 3 is detachably connected with the main body portion 4 to detachably connect the front swing drive assembly with the rear swing drive assembly. In this way, the space of the main body portion 4 is fully utilized to provide the swing mechanism, and in the case where the detachable portion 3 is detachable from the main body portion 4, detachable connection of the swing mechanism is achieved.

Fig. 15A-15B are schematic views of a forward swing drive member of a stapler 100 according to an embodiment of the present disclosure. Referring to fig. 5C and 15A-15B, the front swing drive assembly includes a front swing drive member 81, the front swing drive member 81 being connected to the end effector 1; the rear swing drive assembly includes a rear swing drive member 82, the rear swing drive member 82 being disposed in the same direction as the extension direction of the first drive mechanism 10 and side by side, and the detachable portion 3 being detachably connected with the main body portion 4 so that the front swing drive member 81 and the rear swing drive member 82 are detachably connected, for example, both are hooked, plugged, or the like. The extending direction of the rear swing driving member 82 and the first driving mechanism 10 is the axial direction; during the swing mechanism driving the end effector 1 to swing, the front swing driving member 81 and the rear swing driving member 82 move in the axial direction toward the end effector 1 to drive the end effector 1 to swing in the first swing direction; for example, the front swing drive member 81 and the rear swing drive member 82 may also be moved axially away from the end effector 1 to drive the end effector 1 to swing in a second swing direction opposite the first swing direction.

For example, as shown in fig. 15B, the front swing driving member 81 includes a first portion 8001 and a second portion 8002 connected to each other for ease of manufacture, and when the front swing driving member 81 is long in the axial direction, dividing the front swing driving member 81 into two portions connected to each other is advantageous for buffering stress of the front swing driving member 81, and also for ease of manufacture and installation.

For example, referring to fig. 2 and 14A-14B, the forward swing drive assembly includes a bendable portion 80, the bendable portion 80 configured to bend in a first swing direction or a second swing direction to cause the end effector 1 to swing about the bendable portion 80; the end effector 1 includes a first end proximate to the forward swing drive assembly and a second end opposite the first end, the first end of the end effector 1 being coupled to the forward swing drive assembly, and the bendable portion 80 being axially located between a position where the forward swing drive assembly is coupled to the first end of the end effector 1 and a position where the forward swing drive assembly is coupled to the rearward swing drive assembly, such that the end effector 1 oscillates about the bendable portion 80. In connection with fig. 11A, the second driving mechanism 20 includes a driving belt 201 extending in an axial direction, and in the staple pushing stage, the driving belt 201 enters the end effector 1 through the bendable portion 80 to drive the staple pushing assembly to push out staples from the staple cartridge assembly 11, and the belt surface of the driving belt 201 is substantially perpendicular to the swinging direction of the end effector 1, so as to increase the flexibility of the second driving mechanism 20.

Referring to fig. 5B, for example, the second driving mechanism 20 further includes a connection portion 202, the connection portion 202 being detachably connected to the closing mechanism 2, on a side of the belt 201 away from the end effector 1, wherein an end of the connection portion 202 near the end effector 1 is connected to an end of the belt 201 away from the end effector 1, and the detachable portion 3 is connected to the main body portion 4 such that an end of the connection portion 202 away from the end effector 1 is connected to the first driving mechanism 10, so that both the breakage of the second driving mechanism 20 can be reduced when the belt 201 swings in cooperation with the end effector 1, and various functions can be realized by using the connection portion 202. For example, a part of the connecting portion 202 also serves as the above-described lock driving structure, for example, the connecting portion 202 is also detachably connected with the detachable connecting structure 6. Thereby fully utilizing the same component to realize the functions, saving space and having great significance for reducing the size of the anastomat 100.

For example, the second driving mechanism 20 includes a plurality of driving belts 201, the plurality of driving belts 201 are stacked in a direction perpendicular to the belt surface, and no gap exists between the adjacent driving belts 201 to enhance the strength of the second driving mechanism 20, ensuring the reliability of the driving of the staple pushing driving mechanism 40 in the axial direction.

For example, the material of the driving belts 201 is steel, the thickness of each driving belt 201 in the direction perpendicular to the belt surface is 100 μm to 1000 μm, and the length of each driving belt 201 in the axial direction is 10cm to 30cm, so that the strength required for driving the push pin driving mechanism 40 to move in the axial direction is ensured. Of course, the sizing may be performed according to actual needs, and the embodiments of the present disclosure are not limited thereto. The material of the belt 201 is not limited to steel, and may be other metal materials or organic materials.

For example, referring to fig. 5B, in a state where the second driving mechanism 20 is connected to the first driving mechanism 10, an end of the belt 201 away from the first driving mechanism 10 is connected to the staple pushing driving mechanism 40, for example, welded to the staple pushing driving mechanism 40, but other connection methods are also possible.

The direction from the first end of the end effector 1 to the second end of the end effector 1 is a first direction. As shown in fig. 11B and 13C, the cartridge holder of the cartridge includes a first portion 511 and a second portion 512 extending in a first direction, each of which includes a slot for receiving a staple and defines a slot extending in the first direction, into which slot a cutting drive mechanism and a conveyor belt enter and slide via a bendable region 80 during movement of the staple pusher sled 60 by the staple pusher drive mechanism 40 to effect movement of the cutting drive mechanism (i.e., the staple pusher drive mechanism 40) between a first end and a second end of the end effector 1.

For example, as shown in fig. 14A-14B, the forward swing drive assembly includes a transmission mechanism coupled to the forward swing drive member 81 and configured to drive the end effector 1 to swing about the bendable region 80 upon actuation of the forward swing drive member 81. For example, the transmission includes a drive rack 820 and gears 811/812/813. The driving rack 820 includes driving teeth 821 extending in the axial direction and connected to the front swing driving member 81 to move in the axial direction under the driving of the front swing driving member 81; for example, the driving rack 820 is integrally formed with the front swing driving member 81. The gears 811/812/813 are engaged with the driving teeth 821 to drive the rack 820 to move in the axial direction to drive the gears to rotate. The front swing driving assembly further comprises a swing head connecting part, a first end, close to the end effector 1, of the swing head connecting part is connected with the first end of the end effector 1, a second end, far away from the end effector 1, of the swing head connecting part comprises a terminal tooth 814, the terminal tooth 814 is meshed with a gear 811/812/813 so that the swing head connecting part and the end effector 1 swing under the driving of the gear 811/812/813, and the meshing position of the terminal tooth 814 and the gear 811/812/813 is a bendable part 80; the disk surfaces of the toothed disk of gears 811/812/813 are substantially perpendicular to the belt surface of belt 201 so that the belt surface of belt 201 is substantially perpendicular to the direction in which end effector 1 oscillates.

For example, as shown in fig. 14A to 14B, the transmission mechanism includes a plurality of gears arranged in the axial direction, adjacent gears of the plurality of gears 3 being meshed with each other; the gear 813 closest to the end effector 1 of the plurality of gears 811/812/813 is engaged with the terminal tooth 814 of the second end of the swing joint, and at least the gear 811 furthest from the end effector 1 of the plurality of gears 811/812/813 is engaged with the driving tooth 821 of the driving rack 820, so that the dependence on a single gear is avoided, and the stability of the operation of the transmission mechanism is increased.

For example, as shown in fig. 14A-14B, the diameter of the toothed disc of the gear 813 closest to the end effector 1 of the plurality of gears 811/812/813 is smaller than the diameter of the toothed discs of the other gears 812/813 of the plurality of gears 811/812/813, so that the forward swing drive mechanism connection with the larger diameter gear moves axially a smaller distance, which may cause the end teeth 814 of the swing joint to rotate a larger angle, i.e., the end effector 1 connected with the swing joint to rotate a larger angle, thereby facilitating a larger swing of the end effector 1 with a limited axial length.

14A-14B, stapler 100 further includes a stabilizing rack 830, stabilizing rack 830 engaged with gears 811/812/813, drive rack 820 located on a first side of gears 811/812/813, stabilizing rack 830 located on a side of gears 811/812/813 opposite the first side, stabilizing rack 830 not connected to forward swing drive member 81. The stabilizing rack 830 is capable of carrying the gears 811/812/813, making the structure and operation of the gears 811/812/813 more stable.

For example, as shown in fig. 14A-14B, where the closure mechanism is a sleeve 2 that is sleeved outside of the second drive mechanism 20 and the drive mechanism, the cartridge assembly 11 includes a first end adjacent the sleeve 2 and the anvil 12 includes a first end adjacent the sleeve 2. In the closing phase, the second driving mechanism 20 is driven by the first driving mechanism 10 to move towards the end effector 1 and drive the sleeve 2 to move towards the end effector 1 so that the sleeve 2 is sleeved on the first end of the cartridge assembly 11 and the first end of the anvil 12, and pressure is applied to the first end of the cartridge assembly 11 and the first end of the anvil 12 to close the end effector 1; the sleeve 2 comprises a first portion 21 close to the end effector 1 and a second portion 22 remote from the end effector 1; the stapler 100 further comprises a rotatable sleeve connection member 25, by means of which the first portion 21 of the sleeve 2 is connected to the second portion 22 of the sleeve 2, the rotatable sleeve connection member 25 being located at the bendable portion 80 such that the first portion 21 of the sleeve 2 can oscillate with the end effector 1, thereby adapting the closing mechanism to the oscillating design of the end effector 1.

For example, as shown in fig. 14A-14B, the rotatable sleeve 2 connection member includes a first hinge structure and a second hinge structure connected to each other, the first hinge structure being connected to a first portion of the sleeve 2, the second hinge structure being connected to a second portion of the sleeve 2.

Fig. 16A is a schematic, partial view of a rear swing drive assembly of a stapler 100 according to an embodiment of the present disclosure; fig. 16B is a partial schematic view of a manual adjustment drive mechanism of stapler 100, according to one embodiment of the present disclosure; referring to fig. 9 and 16A-16B, the rear swing drive assembly further includes a third swing drive mechanism configured to drive the front swing drive member 81 and the rear swing drive member 82 to move axially toward the end effector 1 or to move axially away from the end effector 1 during a swing of the end effector 1 driven by the swing mechanism, and the third swing drive mechanism is configured to adjust a distance that the front swing drive member 81 and the rear swing drive member 82 move axially toward the end effector 1 or to move axially away from the end effector 1, thereby adjusting an amplitude of the swing of the end effector 1.

18A-18B are schematic views of a handle provided in an embodiment of the present disclosure; as shown in fig. 16A to 16B and fig. 18A to 18B, the third swing drive mechanism includes a shift position adjusting switch 98, and the shift position adjusting switch 98 is configured to adjust the distance by which the front swing drive member 81 and the rear swing drive member 82 move toward the end effector 1 in the axial direction, or adjust the distance by which the front swing drive member 81 and the rear swing drive member 82 move away from the end effector 1 in the axial direction, so as to adjust the amplitude of the swing of the end effector 1 in steps.

For example, the front swing drive member 81 and the rear swing drive member 82 are each a single rod extending in the axial direction; the front swing driving member 81 extends in the axial direction, is arranged side by side with the second driving mechanism 20, to make full use of the space inside the elongated sleeve 2; the rear swing drive member 82 extends in the axial direction and is arranged side by side with the first drive mechanism 10 to make full use of the space within the elongate sleeve 2.

As shown in fig. 15A to 15B, the detachable portion 3 is detachably connected with the main body portion 4 to detachably connect the front swing driving member 81 with the rear swing driving member 82, thereby realizing the detachable connection of the front swing driving assembly with the rear swing driving assembly.

For example, the forward swing drive member 81 includes a first portion and a second portion detachably connected to the first portion in fig. 15A-15B, and both the first portion and the second portion of the forward swing drive member 81 are located at the detachable portion 3 when the detachable portion 3 of the stapler 100 is not connected to the main body portion 4.

As shown in fig. 16A to 16B, the third swing drive mechanism is a manual adjustment drive mechanism by which each shift position is shifted toward the first shifting direction by a distance of shifting the front swing drive member 81 and the rear swing drive member 82 toward the end effector 1 in the axial direction to rotate the end effector 1 toward the first swinging direction by an angle of one shift position; alternatively, each time one shift position is shifted toward the second shifting direction, the front swing driving member 81 and the rear swing driving member 82 are moved away from the end effector 1 in the axial direction by a distance of one shift position to rotate the end effector 1 toward the second shifting direction by an angle of one shift position. For example, as shown in fig. 1, the manual adjustment drive mechanism includes a manual knob 96, and the manual knob 96 is manually operated to control the shift positions of the front swing drive member 81 and the rear swing drive member 82 in the axial direction toward the end effector 1.

Alternatively, the third swing drive mechanism is an electric drive mechanism. For example, the electric drive mechanism includes an electric motor and a swing control switch; the electric motor is configured to rotate to drive the front swing drive member 81 and the rear swing drive member 82 to move axially toward the end effector 1 or to move axially away from the end effector 1; the swing control switch is configured to control the sending of an electrical signal to the electric motor to control the operation of the motor.

As shown in fig. 16A to 16B and fig. 18A to 18B, the main body portion 4 includes a handle 9, the yaw control switch is a dial 93 switch, the dial 93 switch includes a dial 93 provided on a surface of the handle 9, the dial 93 is configured to be toggled in a first toggling direction to drive the end effector 1 to swing in a first swinging direction, and is configured to be toggled in a second toggling direction to drive the end effector 1 to swing in a second swinging direction, the first toggling direction being different from the second toggling direction.

For example, the dial 93 has a gear mark thereon. Each time one gear is shifted toward the first shifting direction, the front swing driving member 81 and the rear swing driving member 82 are moved toward the end effector 1 in the axial direction by a distance of one gear to rotate the end effector 1 by an angle of one gear toward the first swinging direction; alternatively or/and, each time a gear is shifted toward the second shift direction, the front swing drive member 81 and the rear swing drive member 82 are moved away from the end effector 1 in the axial direction by a distance of one gear to rotate the end effector 1 toward the second shift direction by an angle of one gear.

Illustratively, fig. 17 is a schematic diagram of the stapler 100 provided in an embodiment of the present disclosure, wherein the ejector pin sled 60 is positioned at the second end of the end effector 1 before the end effector 1 is closed, and the stapler 100 includes the end effector 1, a closing mechanism, and an ejector pin assembly, as shown in fig. 17. The end effector 1 comprises a nail bin assembly 11 and a nail anvil 12, wherein the nail bin assembly 11 is provided with anastomotic nails; the closure mechanism is configured to drive the cartridge assembly 11 and anvil 12 into apposition during a closure phase to clamp a target tissue, the end effector 1 having a first end proximal to the closure mechanism and a second end distal from the closure mechanism; the staple pushing assembly is configured to push staples from the cartridge assembly 11 into target tissue in a direction from the second end of the end effector 1 to the first end of the end effector 1 and suture target tissue from the second end to the first end during a staple pushing phase subsequent to the closure phase. Compared to suturing the target tissue from the first end of the end effector 1 to the second end of the end effector 1, the tissue slippage can be reduced during the process of suturing the target tissue from the second end of the end effector 1 to the first end of the end effector 1, the accuracy of suturing the target tissue is higher, and the belt 201 is prevented from deforming due to excessive resistance when the belt 201 moves in the direction from the first end of the end effector 1 to the second end of the end effector 1 when the target tissue is sutured from the first end of the end effector 1 to the second end of the end effector 1, which does not reach the preset staple pushing distance driven by the belt 201.

The staple pushing assembly includes a staple pushing blade 700, a staple pushing sled 60, and a staple pushing drive mechanism 40. Staple pusher 700 is aligned in a direction from the second end to the first end and is configured to apply a staple pushing pressure to the staples to push the staples out of cartridge assembly 11; the ejector pin sled 60 is configured to apply pressure to the ejector pin blade 700 to drive the ejector pin blade 700 to apply ejector pin pressure to the staples; the ejector pin driving mechanism 40 is configured to drive the ejector pin sled 60 in a direction from the second end to the first end during the ejector pin stage such that the ejector pin sled 60 sequentially contacts the ejector pin blade 700 in the direction from the second end to the first end to apply ejector pin pressure to the ejector pin blade 700.

For example, as shown in fig. 17, prior to the stapling stage, the stapling slide 60 is located at the second end; in the stapling stage, the pusher sled 60 is moved from the second end of the end effector 1 to the first end of the end effector 1 and sequentially ejects staples in the cartridge assembly 11 in a direction from the second end of the end effector 1 to the first end of the end effector 1 to staple target tissue.

For example, as shown in fig. 17, stapler 100 also includes a cutting device and a cutting drive mechanism. The cutting device is configured to cut the target tissue at a cutting stage after the target tissue is entirely sutured; the cutting drive mechanism is configured to drive the cutting device to cut the target tissue during a cutting phase in which the cutting device is moved from a first end of the end effector 1 to a second end of the end effector 1 to cut the target tissue in a direction from the first end of the end effector 1 to the second end of the end effector 1.

For example, the cutting device includes a blade carrying member and a cutting blade 605. The ejector sled 60 is multiplexed as a knife-carrying member, i.e., the cutting device is located at the second end of the end effector 1 during the closing phase and the ejector phase. The staple pushing driving mechanism 40 is multiplexed as a cutting driving mechanism; the cutting knife 605 is movably connected with the nail pushing slide block 60, and the nail pushing slide block 60 moves to enable the cutting knife 605 to move; in the stapling stage, the cutting blade 605 is at least partially positioned in the stapling slide 60, the cutting blade 605 is moved with the stapling slide 60 in a direction from the second end of the end effector 1 to the first end of the end effector 1, and the cutting blade 605 is at a predetermined distance from the target tissue clamped between the cartridge assembly 11 and the anvil 12 such that the cutting blade 605 does not contact the target tissue. At the end of the stapling stage, the stapling slide 60 is located at the first end, i.e. when the stapling stage is ended, the stapling slide 60 reaches the first end of the end effector 1; in the cutting stage, the staple pushing drive mechanism 40 pushes the staple pusher 60 such that the cutting blade 605 moves with the staple pusher 60 in a direction from the first end of the end effector 1 to the second end of the end effector 1, and the cutting blade 605 contacts the target tissue and cuts the target tissue in a direction from the first end of the end effector 1 to the second end of the end effector 1 under the action of the blade-out drive force. Cutting after the whole target tissue is sutured is beneficial to improving the suturing and cutting accuracy, and the multiplexing of the push pin sliding block 60 as the knife carrying component can simplify the structure and save the space. For example, stapler 100 includes an ejection drive structure 602, the cartridge housing includes a resistive surface 503, the resistive surface 503 faces the ejection drive structure 602, the ejection drive structure 602 is configured to strike the resistive surface 503 when the cutting device reaches the first end of the end effector 1 under the drive of the cutting drive mechanism, such that the resistive surface 503 applies an ejection drive force to the ejection drive structure 602, and the ejection drive structure 602 is configured to contact the cutting blade 605 under the action of the ejection drive force to apply a first drive force to the cutting blade 605 to drive the cutting blade 605 toward the target tissue. Then, the staple pushing driving mechanism 40 pushes the staple pushing ram 60 to move the cutter 605 along with the staple pushing ram 60 in a direction from the first end of the end effector 1 to the second end of the end effector 1, and the cutter 605 contacts and cuts the target tissue in a direction from the first end of the end effector 1 to the second end of the end effector 1 under the action of the cutter driving force, so that the structure can be simplified, and the reciprocating movement of the cutter 605 between the first end of the end effector 1 and the second end of the end effector 1 can be reduced, thereby improving the working efficiency of the stapler 100.

Of course, in other embodiments, the staple pushing and cutting may be independent, i.e., the staple pusher 60 is not used as a knife carrier. I.e. the cutting device comprises a knife carrying member and a cutting knife 605; the cutting knife 605 is movably connected with a knife carrying component, and the knife carrying component moves to enable the cutting knife 605 to move; in the stapling stage, the cutting device and the cutting drive mechanism are positioned at the first end of the end effector 1; in the cutting stage, the cutting drive mechanism drives the cutting device to move from the first end of the end effector 1 to the second end of the end effector 1 to cut the target tissue in a direction from the first end of the end effector 1 to the second end of the end effector 1, the knife carrier and the staple pusher sled 60 are independent of each other, and the cutting drive mechanism and the staple pusher drive mechanism 40 are independent of each other.

In one example, as shown in fig. 17, for example, the staple pushing drive mechanism 40 is configured to be uncoupled from the staple pushing sled 60 during a closing phase, to move toward the second end of the end effector 1 to couple with the staple pushing sled 60 prior to the staple pushing phase, and to move in a direction from the second end of the end effector 1 to the first end of the end effector 1 during the staple pushing phase to drive the staple pushing sled 60 to move in a direction from the second end of the end effector 1 to the first end of the end effector 1.

In another example, for example, the staple pushing drive mechanism 40 is configured to be positioned at the second end of the end effector 1 and coupled to the staple pushing sled 60 during the closing phase and to move in a direction from the second end of the end effector 1 to the first end of the end effector 1 during the staple pushing phase to drive the staple pushing sled in a direction from the second end of the end effector to the first end of the end effector.

For example, in another embodiment, during the cutting phase, the cutting device is moved from the second end of the end effector to the first end of the end effector to cut the target tissue in a direction from the second end of the end effector to the first end of the end effector. For example, the staple pusher is reused as the knife carrier.

Alternatively, in some embodiments, during the stapling stage, the cutting device and the cutting drive mechanism are located at the second end of the end effector; cutting by the cutting device after the whole target tissue is sutured; and during a cutting phase, the cutting drive mechanism drives the cutting device to move from the second end of the end effector to the first end of the end effector to cut the target tissue in a direction from the second end of the end effector to the first end of the end effector, the knife carrying member and the staple pusher sled are independent of each other, and the cutting drive mechanism and the staple pusher drive mechanism are independent of each other. After the staple driving mechanism moves from the second end of the end effector to the first end of the end effector to staple the target tissue, the staple driving mechanism drives the staple pushing sled to move from the first end of the end effector to the second end of the end effector to connect the staple pushing sled to the cutting apparatus, and then the staple driving mechanism drives the cutting apparatus to move from the second end of the end effector to the first end of the end effector, the cutting blade in the cutting apparatus contacts the target tissue to cut the target tissue in the direction from the second end of the end effector to the first end of the end effector, i.e., in this embodiment, the cutting blade in the cutting apparatus always contacts the target tissue and cuts the target tissue as it moves in the direction from the second end of the end effector to the first end of the end effector. For example, the end of the knife-carrying part near the nail pushing slide block is provided with a third connecting structure, the end of the nail pushing slide block near the knife-carrying part is provided with a fourth connecting structure, and the third connecting structure is connected with the fourth connecting structure, so that the nail pushing slide block is connected with the cutting device. The third connection structure may refer to the first connection structure, for example, including a through hole, and the third connection structure may refer to the second connection structure, for example, including an elastic connection element, specifically please refer to the connection manner of the first connection structure and the second connection structure.

For example, in other embodiments, the cutting device includes a knife carrier and a cutting knife, the staple pusher is multiplexed as the knife carrier, and the staple pusher is multiplexed as the cutting drive; the cutting knife is movably connected with the nail pushing sliding block, and the nail pushing sliding block moves to enable the cutting knife to move. The staple pushing stage and the cutting stage are performed simultaneously, the staple pushing sled is moved in a direction from the second end of the end effector to the first end of the end effector to sequentially push staples out of the stapled target tissue, the cutting knife contacts the target tissue and the cutting knife moves with the staple pushing sled to cut the target tissue in a direction from the second end of the end effector to the first end of the end effector, and the cutting knife and the staple pushing sled are configured such that each portion of the target tissue to be stapled in a direction from the second end of the end effector to the first end of the end effector is cut by the cutting knife immediately after being stapled. I.e., edge-to-edge cutting, the cutting lags the stapling by a little for each part of the target tissue to be stapled and cut.

For example, in the case of such hemming and cutting, for example, in the process that the cutter 605 drives the staple pushing blade 700 to push out the staples first as the pusher 60 moves in the direction from the second end to the first end, the end of the pusher 60 near the first end of the end effector 1, the cutter 605 is located on the side of the end of the pusher 60 near the second end of the end effector 1 and spaced apart from the end of the pusher 60 by a preset distance. For example, the preset distance is the sum of the widths of 2-4 staples continuously arranged along the direction from the second end of the end effector to the first end of the end effector in the direction from the second end of the end effector to the first end of the end effector, so that the cutting lag is more suitable than the cutting lag for each part of the target tissue to be sutured and cut, and the suturing and cutting effect can be ensured to be better.

For example, for the various embodiments described above in which suturing is performed along a path from the second end of end effector 1 to the first end of end effector 1, stapler 100 further includes a first drive mechanism 10, first drive mechanism 10 being configured to: in the closing phase, the first driving mechanism 10 is detachably connected with the closing mechanism to drive the closing mechanism to close the end effector 1; during the staple ejection phase, the first drive mechanism 10 is disengaged from the closure mechanism and drives the staple ejection assembly to eject the staples from the cartridge assembly 11. Stapler 100 further includes a second drive mechanism 20, second drive mechanism 20 being detachably connected to first drive mechanism 10, second drive mechanism 20 being configured to be detachably connected to the closure mechanism during a closing phase and configured to be moved toward the second end of end effector 1 by the drive of first drive mechanism 10 to bring the closure mechanism into contact with cartridge assembly 11 and anvil 12 and to apply pressure to cartridge assembly 11 and anvil 12 to close end effector 1; the second drive mechanism 20 is further configured to disengage from the closure mechanism after closure of the end effector 1, continue to move towards the second end of the end effector 1 under the drive of the first drive mechanism 10 to connect with the staple pusher drive mechanism 40 and continue to move towards the second end of the end effector 1 to drive the staple pusher drive mechanism 40 to reach the second end of the end effector 1 to connect with the staple pusher sled 60; the second drive mechanism 20 is further configured to drive the staple pushing drive mechanism 40 in a direction from the second end of the end effector to the first end of the end effector under the drive of the first drive mechanism 10 to staple target tissue during the staple pushing stage. The structure of the first driving mechanism 10, the second driving mechanism 20, etc. is specifically referred to the description in the previous embodiment, and is not repeated here.

For example, for the various embodiments described above in which suturing is performed along a path from the second end of the end effector 1 to the first end of the end effector 1, the cutting drive device is configured to drive the cutting device to cut the target tissue under the drive of the first drive mechanism 10.

For example, for the various embodiments described above in which stapling is performed along a path from the second end of the end effector 1 to the first end of the end effector 1, the closure mechanism is a sleeve 2 that is positioned over the second drive mechanism 20, the cartridge assembly 11 includes a first end adjacent the sleeve 2, and the anvil 12 includes a first end adjacent the sleeve 2; in the closing phase, the second drive mechanism 20 is driven by the first drive mechanism 10 to move toward the end effector 1 and to drive the sleeve 2 toward the end effector 1 such that the sleeve 2 is positioned over the first end of the cartridge assembly 11 and the first end of the anvil 12 and applies pressure to the first end of the cartridge assembly 11 and the first end of the anvil 12 to close the end effector 1. For a specific structure, reference is made to the previous description of the sleeve 2 closing the end effector 1. Features of various embodiments of the disclosure may be combined without conflict.

At least one embodiment of the present disclosure provides a handle 9, which handle 9 may be used with a stapler 100, which stapler 100 may be used as a medical instrument, such as a surgical instrument, for holding a target tissue and suturing and cutting the target tissue. The handle 9 is configured to be detachably connected to the detachable portion 3 of the stapler 100, the detachable portion 3 comprising an end effector 1, said end effector 1 comprising a cartridge assembly 11 and an anvil 12.

18A-18B are schematic views of a handle provided in an embodiment of the present disclosure, and FIG. 19 is an enlarged schematic view of a dial and a bi-directional control button. As shown in fig. 18A-18B and 19, the handle 9 includes a dial 93 switch, the dial 93 switch including a dial 93 disposed on the first surface 91 of the handle 9, the dial 93 configured to be rotated by being toggled to control the swing direction and the swing angle of the end effector 1, so as to control the swing direction and the swing angle of the end effector 1 by operating the dial 93, and the operation is convenient and easy to control during the operation.

For example, the dial 93 is configured to be toggled in a first rotational direction to rotate in a first rotational direction to drive the end effector 1 to swing in a first swing direction, and configured to be toggled in a second rotational direction to rotate in a second rotational direction to drive the end effector 1 to swing in a second swing direction, the first rotational direction being opposite to the second rotational direction, to enable control of the end effector 1 to swing in a different direction by the operation of the dial 93, and is convenient to operate and easy to control during surgery.

For example, the dial 93 has a gear mark thereon; each time the user operates the dial 93 to rotate one gear in the first rotation direction according to the gear mark, the end effector 1 rotates by an angle corresponding to one gear in the first swing direction; and can be according to the gear mark, every time the user operates the driver plate 93 and rotates a gear towards second direction of rotation, end effector 1 rotates the angle that a gear corresponds towards second direction of swing to realize adjusting end effector 1 through this driver plate 93 and towards different direction wobbling range, convenient operation in the operation process, easy control.

For example, as shown in fig. 18A-18B and 19, the shift index includes a plurality of shift grooves 900 arranged in a first rotational direction and a second rotational direction, the plurality of shift grooves 900 configured to: each time the dial 93 rotates one gear groove 900 toward the first rotation direction, the end effector 1 is rotated by an angle corresponding to one gear toward the first swing direction; each time the dial 93 rotates one gear groove 900 toward the second rotation direction, the end effector 1 rotates one gear corresponding to the angle toward the second swing direction. In this way, the operator can adjust the number of the rotated shift grooves 900 by tactile sensation so as to control the shift position of the swing end effector 1.

For example, as shown in fig. 18A to 18B and fig. 19, the extending direction of the shift groove 900 coincides with the extending direction of the handle 9, and the first rotation direction and the second rotation direction are substantially perpendicular to the extending direction of the handle 9.

The detachable part 3 further comprises a closing mechanism, a staple pushing assembly and a cutting device, which structures are described in particular with reference to the previous embodiments. As shown in fig. 18A-18B, the handle 9 further includes a bi-directional control button 94, the bi-directional control button 94 including a first end 941 and a second end 942, the bi-directional control button 94 being configured to: the first end is pressed to control the sequential performance of the closing phase, the stapling phase and the cutting phase; in the closing phase, the closing mechanism closes the end effector 1 to clamp the target tissue by closing the cartridge assembly 11 and the anvil 12; in the staple pushing stage, the staple pushing assembly pushes staples out of the cartridge assembly 11 to staple target tissue; in the cutting stage, the cutting device cuts the target tissue; and, the bi-directional control button 94 is also configured to: the second end is pressed to control the closure mechanism to fail to bring the cartridge assembly 11 and anvil 12 into apposition, and the cartridge assembly 11 and anvil 12 are moved away from each other to open the end effector 1.

For example, as shown in fig. 18A to 18B and fig. 19, a bidirectional control button 94 is provided on the first surface 91 of the handle 9, adjacent to the dial 93 switch, and aligned with the dial 93 switch in the extending direction of the handle 9, so as to facilitate the operation of the dial 93 and the bidirectional control button 94 by the operator. For example, a first end of the bi-directional control button 94 is opposite a second end of the bi-directional control button 94 in the direction of extension of the handle 9 to further facilitate manipulation of the first and second ends 941, 942 of the bi-directional control button 94.

For example, as shown in fig. 18A-18B and 19, the handle 9 further includes a safety prompting button 95, the safety prompting button 95 being configured to be in a normally closed prompting state after the first end 941 of the bi-directional control button 94 is pressed and after the closing phase is normally performed to prompt the operator to continue pressing the first end 941 of the bi-directional control button 94 to perform the stapling phase and to be in a normally stitched prompting state after the stapling phase is normally performed to prompt the operator to continue pressing the first end 941 of the bi-directional control button 94 to perform the cutting phase and to be in a normally cut prompting state after the cutting phase is normally performed to prompt the operator to press the second end 942 of the bi-directional control button 94 to open the end effector 1.

For example, in the normal closing prompt state, the normal sewing prompt state and the normal cutting prompt state, the safety prompt button 95 protrudes from the surface of the handle 9, otherwise, the safety prompt button 95 is recessed on the surface of the handle 9 or is substantially flush with the surface of the handle 9, so that an operator can know whether each stage is normally performed by observing or touching the safety prompt button 95 at each stage, thereby determining the next operation.

For example, as shown in fig. 18A-18B and 19, the handle 9 also has a second surface 92, the second surface 92 being adjacent to and intersecting the first surface 91, and a safety cue button 95 is located on the second surface 92 of the handle 9.

At least one embodiment of the present disclosure provides a main body of a stapler 100, and fig. 20 is a schematic diagram of the main body of the stapler 100 according to one embodiment of the present disclosure. As shown in fig. 20, the main body of the stapler 100 includes any one of the handles 9 provided in the embodiment of the present disclosure, and a driving part 99 connected to the handle 9. The extending direction of the whole driving part 99 is axial, and the axial direction intersects with the extending direction of the handle 9; an end of the drive portion 99 remote from the handle 9 is detachably connected to the detachable portion 3 and includes an electric motor and a rear swing drive member 82; the electric motor is connected with a driving plate 93 through a switch signal, and the driving plate 93 is switched to control the work of the electric motor; the back swing driving member 82 is connected to an electric motor, which extends in the axial direction, and is configured to rotate under the switch control of the dial 93 to drive the back swing driving member 82 to move in the axial direction to drive the end effector 1 to swing, so that the operation of the electric motor can be controlled by operating the dial 93 on the handle 9, thereby controlling the movement of the back swing driving member 82 to control the swinging angle of the end effector 1, and the operation is simple.

For example, the driving part 99 is detachably connected with the handle 9, and for the main body of the anastomat 100, the driving part 99 and the handle can be replaced, so that the cost is saved.

For example, when the dial 93 is configured to be rotatable in shift positions in the first rotation direction or the second rotation direction, each time the dial 93 is rotated one shift position in the first dial direction, the electric motor is rotated one shift position in the forward direction to drive the rear swing drive member 82 to move away from the handle 9 in the axial direction by a distance of one shift position to rotate the end effector 1 by an angle of one shift position in the first swing direction; each time the dial 93 is rotated one gear toward the second toggle direction, the electric motor reversely rotates one gear to drive the rear swing driving member 82 to move axially closer to the handle 9 by one gear distance to rotate the end effector 1 by one gear angle toward the second swing direction, so that the direction and gear of the rotation of the electric motor can be conveniently controlled by operating the dial 93 on the handle 9 to control the movement of the rear swing driving member 82 to control the swing angle of the end effector 1, and the operation is simple.

For example, the driving section 99 further includes a first driving mechanism 10, the first driving mechanism 10 being provided in the same direction as and side by side with the extension direction of the rear swing driving member 82, the first driving mechanism 10 being configured to: in the closing phase, the first driving mechanism 10 is detachably connected with the closing mechanism to drive the closing mechanism to close the end effector 1; in a staple pushing stage following the closing stage, the first drive mechanism 10 is disengaged from the closing mechanism and drives the staple pushing assembly to push staples out of the cartridge assembly 11 to staple target tissue; in the cutting phase, the first drive mechanism 10 drives the cutting device to cut the target tissue. For the specific features of the first drive mechanism 10, please refer to the description in the previous embodiment, and will not be repeated here.

For example, as shown in fig. 20, the driving portion 99 is located on the first surface 91 of the handle 9, intersecting the first surface 91 in the axial direction; the drive portion 99 includes a first end 941 connected to the handle 9 and a second end 942 axially remote from the handle 9, the first surface 91 facing the second end 942 of the drive portion 99 to facilitate operator actuation of the dial 93 on the first surface 91, and the second surface 92 adjacent to and intersecting the first surface 91 to facilitate operator identification of the safety reminder switch on the second surface 92.

At least one embodiment of the present disclosure provides a stapler 100, the stapler 100 comprising any one of the stapler 100 bodies provided by the embodiments of the present disclosure, and a detachable portion 3. The detachable portion 3 of the stapler 100 is detachably connected to the main body portion 4 of the stapler 100, the detachable portion 3 further includes a forward swing drive assembly connected to the end effector 1, the detachable portion 3 is detachably connected to the main body of the stapler 100 to detachably connect the forward swing drive assembly to the backward swing drive member 82, and the forward swing drive assembly drives the end effector 1 to swing under the drive of the backward swing drive member 82. The specific structure of the front swing drive assembly and the rear swing member is referred to the description in the previous embodiment and will not be repeated here.

For example, for a stapler 100 comprising any of the stapler 100 bodies provided in the embodiments of the present disclosure, the detachable portion 3 further comprises a second drive mechanism 20 extending in the axial direction; the detachable portion 3 is connected with the main body of the anastomat 100 so as to detachably connect the second driving mechanism 20 with the first driving mechanism 10; the second drive mechanism 20 is configured to be detachably connected to the closure mechanism in the closing stage and to be moved toward the end effector 1 by the first drive mechanism 10 to cause the closure mechanism to close the end effector 1; the second drive mechanism 20 is further configured to disengage from the closure mechanism during the staple ejection phase and continue to move toward the second end 942 of the end effector 1 under the drive of the first drive mechanism 10 to drive the staple ejection assembly to eject staples from the cartridge assembly 11; the second drive mechanism 20 is further configured to: in the cutting stage, the second driving mechanism 20 drives the cutting device to cut the target tissue under the driving of the first driving mechanism 10. The specific structure of the second driving mechanism 20 and the first driving mechanism 10 is referred to the description in the previous embodiment, and is not repeated here.

The foregoing is merely exemplary embodiments of the present invention and is not intended to limit the scope of the invention, which is defined by the appended claims.

Claims

1. A stapler, comprising:

the end effector comprises a nail bin assembly and a nail anvil, wherein a anastomotic nail is arranged in the nail bin assembly;

a closure mechanism, wherein in an initial state, the end effector is in an open state; in a closing phase, the closing mechanism is configured to drive the cartridge assembly and the anvil into apposition to close the end effector to clamp a target tissue;

a staple pushing assembly, wherein, at a staple pushing stage subsequent to the closing stage, the staple pushing assembly is configured to push the staples out of the cartridge assembly to staple the target tissue; and

a locking mechanism configured to define the closing mechanism in a first position to maintain the closing mechanism in a closed state of the end effector during the stapling stage, and configured to define the closing mechanism in a second position to maintain the end effector in the open state in the initial state;

the locking mechanism includes:

a first limit structure configured to limit the closure mechanism to the first position during the stapling stage; and

a second limit structure configured to limit the closing mechanism to the second position in the initial state;

The stapler further comprises:

a first elastic member connected with the closing mechanism, wherein, in the closing phase, the closing mechanism moves toward the end effector to close the end effector and elastically deform the first elastic member;

in the stapling stage, the first elastic member elastically deformed applies a first resistance to the closing mechanism under the action of elastic restoring force of the first elastic member to prevent the closing mechanism from moving towards the end effector, the first limiting structure is configured to apply a second resistance to the closing mechanism opposite to the first resistance, and the first resistance and the second resistance are balanced to limit the closing mechanism to the first position;

in the initial state, when the closing mechanism is subjected to a driving force that drives the closing mechanism to deviate from the second position, the second limiting structure is configured to apply a third resistance to the closing mechanism to balance with the driving force so as to limit the closing mechanism to the second position.

2. The stapler of claim 1, wherein the first limit structure comprises:

a first limit groove having a first side wall located on the closing mechanism and configured to move with movement of the closing mechanism; and

A first locking member, wherein at least a portion of a first end of the first locking member is retained in the first retaining groove and in contact with the first sidewall to apply a fourth resistance to the first sidewall during the stapling stage, such that the second resistance is applied to the closure mechanism by the first retaining groove, the fourth resistance being equal in magnitude and in the same direction as the second resistance;

the second limit structure includes:

a second limit slot having a second side wall located on the closure mechanism and configured to move with movement of the closure mechanism; and

and a second locking member, wherein in the initial state, at least a portion of the first end of the second locking member is retained in the second retaining groove and is configured to be contactable with the second side wall to apply a fifth resistance to the second side wall, thereby applying the third resistance to the closing mechanism through the second retaining groove, the fifth resistance being equal in magnitude to the third resistance and in the same direction as the first resistance.

3. The stapler of claim 2, wherein the first and second locking members are the same common locking member, the first and second limit slots moving relative to the common locking member to configure the common locking member to move from the second limit slot to the first limit slot during the closing phase;

The common locking member and the first limiting groove constitute the first locking member when the first end of the common locking member is at least partially limited in the first limiting groove;

the common locking member and the second limiting groove constitute the second locking member when the first end of the common locking member is at least partially limited in the second limiting groove.

4. The stapler of claim 3, wherein a direction of movement of the closure mechanism, the first limit slot, and the second limit slot is axial, along which the first limit slot is located on a side of the second limit slot that is remote from the end effector.

5. The stapler of claim 4, wherein the locking mechanism further comprises:

and a channel slot located between and in communication with the first and second limit slots, wherein, in the closed phase, the common locking member is configured to move from the second limit slot to the first limit slot via the channel slot.

6. The stapler of claim 5, wherein the common locking member further comprises a second end opposite the first end of the common locking member, and a neck connecting the first end of the common locking member and the second end of the common locking member;

The channel slot is configured to allow the neck portion to pass without allowing the first end of the common locking member to pass such that in the initial state the first end of the common locking member cannot pass through the channel slot but is at least partially retained within the second retaining slot and in the staple ejection stage the first end of the common locking member cannot pass through the channel slot but is at least partially retained within the first retaining slot.

7. The stapler of claim 6, wherein a direction from the first end of the common locking member to the second end of the common locking member is a longitudinal direction, the longitudinal direction being perpendicular to the axial direction, and a direction perpendicular to the axial direction and the longitudinal direction is a lateral direction;

the width of the channel groove in the transverse direction is smaller than the width of the first limit groove in the transverse direction and smaller than the width of the second limit groove in the transverse direction; the width of the common locking member first end in the transverse direction is greater than the width of the neck portion in the transverse direction and greater than the width of the passage groove in the transverse direction.

8. The stapler of claim 7, wherein the locking mechanism further comprises a locking drive structure;

In the closing phase, the lock driving structure is configured to drive the common locking member to move in the longitudinal direction in a direction away from the second end of the common locking member to move the first end of the common locking member out of the second limit groove, and the neck is configured to move from the second limit groove to the first limit groove via the passage groove as the first limit groove and the second limit groove move;

after the end effector is closed, the lock drive structure is configured to drive the common lock member to move in the longitudinal direction toward a direction proximate to the second end of the common lock member such that at least a portion of the first end of the common lock member moves into the first limit slot to be retained within the first limit slot, at least a portion of the first end of the common lock member contacting the first sidewall to apply the fourth resistance to the first sidewall.

9. The stapler of claim 8, wherein at least a portion of the common locking member first end is in contact with a first portion of the first sidewall proximate the channel slot to apply the fourth resistance to the first portion of the first sidewall, the first portion of the first sidewall facing away from the end effector.

10. The stapler of claim 8, wherein the closing mechanism is a hollow sleeve, and the first limit slot, the second limit slot, and the channel slot extend through a wall of the sleeve.

11. The stapler of claim 10, comprising:

the sleeve is sleeved on the outer side of the fixed support, and the first limiting groove, the second limiting groove and the channel groove expose the outer surface of the fixed support;

the fixed bracket includes a through hole extending through the outer surface, at least a portion of the neck and a second end being located in the through hole when at least a portion of the first end of the common locking member is either retained in the first retaining groove or retained in the second retaining groove.

12. The stapler of claim 11, wherein the first end includes a lower surface facing the fixed bolster, an outer surface of the fixed bolster directly contacting the lower surface of the first end to support the first end when at least a portion of the first end of the common locking member is restrained within the first restraint slot or the second restraint slot.

13. The stapler of claim 11, wherein the common locking member and the throughbore form a latch structure.

14. The stapler of claim 4, wherein at least a portion of the first end has a length in the axial direction that is less than a length of the first limit slot in the axial direction.

15. The stapler of claim 2, wherein the first sidewall is a first arc, a side of at least a portion of the first end of the first locking member that contacts the first sidewall is a second arc, and the curvatures of the first and second arcs are the same.

16. The stapler of claim 5, wherein the channel slot has a planar shape of a straight bar.

17. The stapler of claim 11, wherein the lock drive structure includes a bearing surface facing the common locking member; the bearing surface comprises a first surface, a first slope, a protruding surface, a second slope and a second surface which are sequentially arranged along the axial direction, wherein the first slope is connected with the first surface and the protruding surface, the second slope is connected with the protruding surface and the second surface, a first included angle is formed between the first slope and the protruding surface, and a second included angle is formed between the second slope and the protruding surface;

In the longitudinal direction, a distance from the protruding surface to the second limit groove is smaller than a distance from the first surface to the second limit groove and smaller than a distance from the second surface to the second limit groove, a distance from the protruding surface to the passage groove is smaller than a distance from the first surface to the passage groove and smaller than a distance from the second surface to the passage groove, and a distance from the protruding surface to the first limit groove is smaller than a distance from the first surface to the first limit groove and smaller than a distance from the second surface to the first limit groove;

in the initial state, the second end is positioned on one side of the first slope surface away from the second slope surface;

during the closing phase, the lock drive structure is configured to move in the axial direction relative to the common lock member to move the second end along the first ramp to the protruding surface to drive the common lock member in the longitudinal direction toward a direction away from the second end, which in turn moves the second end along the protruding surface and the second ramp to a side of the second ramp away from the first ramp to move the common lock member in the longitudinal direction toward a direction closer to the second end;

In the closing phase, movement of the lock drive structure relative to the common lock member is synchronized with movement of the first and second limit slots relative to the common lock member such that the neck moves from the second limit slot into the first limit slot via the channel slot during movement of the second end relative to the lock drive structure.

18. The stapler of claim 17, wherein the fixed mount and the common locking member do not move in the axial direction, the locking drive structure moving in the axial direction.

19. The stapler of claim 18, further comprising: a first drive mechanism and a second drive mechanism, wherein the first drive mechanism is connected with the second drive mechanism and configured to drive the second drive mechanism to move;

in the closing phase, the second drive mechanism is detachably connected with the closing mechanism and is configured to move towards the end effector under the drive of the first drive mechanism so that the closing mechanism contacts and applies pressure to the cartridge assembly and anvil to close the end effector;

The locking driving structure is arranged on the second driving mechanism.

20. The stapler of claim 19, wherein, during the stapling stage, the second drive mechanism is configured to disengage from the closure mechanism and continue to move toward the end effector to drive the staple pushing assembly to eject the staples from the cartridge assembly;

the first surface is positioned at one end of the second surface near the end effector, and the first end moves from the second limit groove to the first limit groove during the movement of the second end relative to the locking drive structure during the closing phase;

during the stapling stage, the second end moves over the second surface and the second surface is configured to not apply a force to the second end that drives the common locking member to move in the longitudinal direction.

21. The stapler of claim 17, wherein the locking mechanism further comprises:

a second elastic member configured to be compressed during movement of the common lock member in the longitudinal direction toward a direction away from the second end portion and to be restored under an elastic restoring force thereof during movement of the common lock member in the longitudinal direction toward a direction toward the second end portion.

22. The stapler of claim 17, wherein the second end is tapered in shape along the longitudinal direction toward the bearing surface.

23. The stapler of claim 17, wherein the first ramp and the second ramp are planar or curved.

24. The stapler of claim 1, wherein, at an opening stage subsequent to the stapling stage, the locking mechanism is further configured to remove a definition of a position of the closure mechanism to cause the end effector to open.

25. The stapler of any one of claims 2-24, wherein, during an opening phase subsequent to the stapling phase, the first stop structure is configured to eliminate the second resistance, and the closure mechanism moves away from the end effector under the influence of the first resistance to move the cartridge assembly and the anvil away from each other to open the end effector.

26. The stapler of claim 25, wherein, when the first limit structure comprises a first limit slot and a first locking member, the second limit structure comprises a second limit slot and a second locking member, and the first locking member and the second locking member are the same common locking member, during the opening phase, the common locking member is configured to move from the first limit slot to the second limit slot to revert to the initial state.

27. The stapler of claim 26, wherein, when the locking mechanism further comprises a channel slot, the common locking member is configured to move from the first limit slot to the second limit slot via the channel slot during the opening phase.

28. The stapler of claim 27, wherein, when the common locking member comprises a first end, a second end, and a neck, and the locking mechanism further comprises a lock drive structure, a direction from the first end of the common locking member to the second end of the common locking member is a longitudinal direction, a moving direction of the closing mechanism, the first limit groove, and the second limit groove is an axial direction, the longitudinal direction is perpendicular to the axial direction, and a direction perpendicular to the axial direction and the longitudinal direction is a lateral direction;

the lock driving structure is further configured to drive movement of the common lock member in the longitudinal direction in a direction away from the second end to move the first end out of the first limit groove, and the neck is configured to move from the second limit groove to the first limit groove via the passage groove as the first limit groove and the second limit groove move.

29. The stapler of claim 28, wherein, when the lock drive structure comprises a bearing surface facing the locking member, the bearing surface comprising a first surface, a first ramp surface, a protruding surface, a second ramp surface, and a second surface arranged in sequence along the axial direction, during the open phase, the lock drive structure is configured to move relative to the common locking member along the axial direction to move the second end along the second ramp surface to the protruding surface to drive the common locking member to move in the longitudinal direction toward a direction away from the second end, which in turn moves the second end along the protruding surface and the first ramp surface to a side of the first ramp surface away from the second ramp surface to move the common locking member in the longitudinal direction toward a direction toward the second end;

in the opening phase, movement of the lock drive structure relative to the common lock member is synchronized with movement of the first and second limit slots relative to the common lock member such that the neck moves from the first limit slot into the second limit slot via the channel slot during movement of the second end relative to the lock drive structure.

30. The stapler of claim 24, further comprising:

a cutting device configured to cut the target tissue at a cutting stage subsequent to the stapling stage and prior to the opening stage.

31. The stapler of any one of claims 1-24 and 30, wherein said first resilient member is located at an end of said locking mechanism proximate to said end effector and is compressed as said closing mechanism moves toward said end effector; or alternatively, the process may be performed,

the first resilient member is located at an end of the locking mechanism remote from the end effector and is stretched as the closure mechanism moves toward the end effector.

32. The stapler of claim 19, further comprising:

a detachable connection configured to connect with the sleeve and the second drive mechanism during the closing phase to move toward the end effector as the second drive mechanism moves to drive the sleeve to move toward the end effector, and configured to detach from the sleeve after the end effector is closed to stop driving the sleeve to move;

the sleeve comprises a connecting hole penetrating through the barrel wall of the sleeve, and one end of the separable connecting structure is detachably inserted into the connecting hole so as to be detachably connected with the sleeve;

The first limit groove, the second limit groove and the channel groove are opposite to the connecting hole.