CN117562602A

CN117562602A - Anastomat

Info

Publication number: CN117562602A
Application number: CN202311450845.6A
Authority: CN
Inventors: 孔维阳; 李维实
Original assignee: Wuhan United Imaging Zhirong Medical Technology Co Ltd
Current assignee: Wuhan United Imaging Zhirong Medical Technology Co Ltd
Priority date: 2023-10-31
Filing date: 2023-10-31
Publication date: 2024-02-20

Abstract

The invention relates to an anastomat. The anastomat comprises a shell, an end effector, a transmission piece, a driving assembly, an unlocking mechanism and a retraction mechanism; the casing is provided with an opening for operating the retraction mechanism and a cover plate for covering the opening; the transmission piece comprises a first transmission part; the driving assembly comprises a linkage piece and a driving source, wherein the linkage piece is provided with a transmission position and a disconnection position, when the linkage piece is positioned at the transmission position, the linkage piece is in transmission connection with the first transmission part and is connected with the driving source, and when the linkage piece is positioned at the disconnection position, the linkage piece is disconnected with the first transmission part; the unlocking mechanism comprises an unlocking piece in transmission connection with the cover plate, and the unlocking piece can be controlled to move between a first position and a second position by operating the cover plate; when the unlocking member moves from the first position to the second position, the drive linkage member is switched from the transmission position to the disengagement position. The power transmission of the unlocking piece can be interrupted by operating the cover plate, so that the operation steps are reduced, and the retraction efficiency of the transmission piece is improved.

Description

Anastomat

Technical Field

The invention relates to the technical field of medical instruments, in particular to an anastomat.

Background

The electric anastomat is combined with the traditional mechanical components through the direct current motor, the circuit board and the traditional mechanical components, all action functions of the endoscopic anastomat are completely realized under the electric control, the operation method is simple, and the core advantage of reducing the accidental tissue injury caused by the artificial factors in the operation process is widely accepted in clinic. In the electric anastomat, the motor is used as the most main driving device, and faults are unavoidable in other special cases, so that the jaw cannot be opened to separate from the clamping tissue. When a doctor fails during use, the jaw of the anastomat can clamp tissues, and a transmission piece connected with the jaw of the anastomat needs to be driven to retract at the moment, so that the forceps head drives the blade to retract, and the jaw opens to release the tissues. However, the current electric anastomat generally starts to operate after a cover plate on a shell is opened, power is firstly cut off through the first operation of a trigger, then a transmission mechanism is retracted through the small-stroke reciprocating motion after the trigger, the whole process is low in retraction efficiency, and the quick effectiveness of forced retraction operation in operation is affected.

Disclosure of Invention

Based on this, it is necessary to start the operation after opening the cover plate on the housing in the current electric anastomat, firstly, the power is cut off through the first operation of the trigger, then the transmission mechanism is retracted through the small stroke reciprocating motion after the trigger, the whole process makes the retraction efficiency low, and the technical problem of affecting the quick effectiveness of the forced retraction operation in the operation is solved.

An anastomat comprises a shell, an end effector connected with the shell, a transmission piece arranged in the shell, a driving assembly, an unlocking mechanism and a retraction mechanism;

the housing is provided with an opening for operating the retraction mechanism, and a cover plate at least partially covering the opening; the end effector includes a movable cutting member for cutting tissue; the transmission member is movable relative to the housing, the transmission member is for operative connection with the cutting member, and the transmission member includes a first transmission portion and a second transmission portion;

the driving assembly comprises a linkage piece and a driving source, wherein the linkage piece is provided with a transmission position and a disconnection position, when the linkage piece is in the transmission position, the linkage piece is in transmission connection with the first transmission part and in transmission connection with the driving source, and when the linkage piece is in the disconnection position, the linkage piece is disconnected with the first transmission part;

The unlocking mechanism comprises an unlocking piece, the unlocking piece can move between a first position and a second position, the unlocking piece is in transmission connection with the cover plate, and the unlocking piece can be controlled to move between the first position and the second position by operating the cover plate; the unlocking piece is in transmission connection with the linkage piece, and when the unlocking piece moves from the first position to the second position, the linkage piece is driven to be switched from the transmission position to the disconnection position; the retraction mechanism is used for being in operative transmission connection with the second transmission part so as to drive the transmission part to move along a preset direction.

In one embodiment, the cover plate can rotate relative to the shell, the unlocking mechanism further comprises a connecting piece, and the cover plate is in transmission connection with the unlocking piece through the connecting piece; the cover plate is configured to rotate relative to the housing to open relative to the opening, and is driven by the connecting piece to control the unlocking piece to move from the first position to the second position.

In one embodiment, the connecting piece is a connecting rod, one end of the connecting rod is rotatably connected to the unlocking piece, the other end of the connecting rod is rotatably connected to the cover plate, and the rotation axis of the cover plate relative to the shell is not coincident with the rotation axis of the unlocking piece relative to the connecting rod.

In one embodiment, the cover plate can rotate relative to the housing, one of the unlocking piece and the cover plate is provided with a lug, the other is provided with a chute, the lug is accommodated in the chute and can slide relative to the chute, and the cover plate is configured to rotate relative to the housing to control the unlocking piece to move from the first position to the second position when the cover plate is opened relative to the opening.

In one embodiment, the unlocking member is a cam or a slider.

In one embodiment, the driving assembly further comprises an elastic member, and the elastic member is used for applying pushing force to the linkage member to drive the linkage member to reset.

In one embodiment, the unlocking member is a driving wheel, a circumferential wheel wall of the driving wheel is provided with a mounting groove, the mounting groove comprises a first groove section and a second groove section which extend along the circumferential direction of the driving wheel, and the distance between the first groove section and the second groove section relative to one axial end face of the driving wheel is unequal;

the driving assembly further comprises a rotating shaft penetrating through the linkage piece, and the rotating shaft penetrates through the mounting groove and is in sliding connection with the mounting groove;

When the driving wheel moves between the first position and the second position, the rotating shaft moves in the first groove section and the second groove section, so that the linkage piece is driven to move along the axial direction of the driving wheel, and the linkage piece is driven to switch between the transmission position and the disconnection position.

In one embodiment, the retraction mechanism comprises a pawl and a trigger, the trigger can rotate relative to the housing, the pawl is mounted on the trigger, the pawl is operably abutted with the second transmission part, and the pawl is driven by the trigger to drive the transmission part to move along a preset direction.

In one embodiment, the retraction mechanism includes a driving rod and a driving gear, the driving gear is in threaded connection with the driving rod, the driving gear has a first matching position and a second matching position, and the driving gear can be driven to switch from the first matching position to the second matching position by operating the driving rod to axially rotate around the driving gear, so that the driving gear is meshed with the second transmission part, and the transmission part is driven to move along a preset direction.

In one embodiment, the transmission part further comprises a second transmission part, the retraction mechanism comprises a retraction wheel and an adapter, the adapter is wound on the periphery of the retraction wheel, two ends of the adapter are respectively connected to two ends of the transmission part, and the retraction wheel is operated to rotate around the axis of the transmission part, so that the adapter can be driven to drive the transmission part to move along the preset direction.

The invention also provides an anastomat, which can solve at least one technical problem.

the end effector includes a movable cutting member for cutting tissue; the transmission member is movable relative to the housing, the transmission member is for operative connection with the cutting member, and the transmission member includes a first transmission portion and a second transmission portion;

The unlocking mechanism comprises an unlocking driving piece and an unlocking piece, the unlocking driving piece can move relative to the shell, the unlocking piece can move between a first position and a second position, the unlocking piece is in transmission connection with the unlocking driving piece, and the unlocking piece can be controlled to move between the first position and the second position by operating the unlocking driving piece; the unlocking piece is in transmission connection with the linkage piece, and when the unlocking piece moves from the first position to the second position, the linkage piece is driven to be switched from the transmission position to the disconnection position; the retraction mechanism is used for being in operative transmission connection with the second transmission part so as to drive the transmission part to move along a preset direction.

In one embodiment, the unlocking driving member can rotate or move relative to the housing, and the unlocking member comprises a cam or a sliding block.

In one embodiment, the unlocking driving piece can rotate relative to the shell, the unlocking piece is a driving wheel, a circumferential wheel wall of the driving wheel is provided with a mounting groove, the mounting groove comprises a first groove section and a second groove section which extend along the circumferential direction of the driving wheel, and the distance between the first groove section and the second groove section relative to one axial end face of the driving wheel is unequal;

In one embodiment, the retraction mechanism comprises a retraction wheel and an adaptor, the adaptor is wound on the periphery of the retraction wheel, two ends of the adaptor are respectively connected to two ends of the transmission piece, and the adaptor can be driven to drive the transmission piece to move along a preset direction by operating the retraction wheel to rotate around the axis of the adaptor.

The beneficial effects are that:

the anastomat provided by the embodiment of the invention comprises a shell, an end effector connected with the shell, a transmission piece arranged in the shell, a driving assembly, an unlocking mechanism and a retraction mechanism; the housing is provided with an opening for operating the retraction mechanism, and a cover plate at least partially covering the opening; the end effector includes a movable cutting member for cutting tissue; the transmission piece can move relative to the shell, the transmission piece is used for being operably connected with the cutting component, and the transmission piece comprises a first transmission part and a second transmission part; the driving assembly comprises a linkage piece and a driving source, wherein the linkage piece is provided with a transmission position and a disconnection position, when the linkage piece is positioned at the transmission position, the linkage piece is in transmission connection with the first transmission part and is in transmission connection with the driving source, and when the linkage piece is positioned at the disconnection position, the linkage piece is disconnected with the first transmission part; the unlocking mechanism comprises an unlocking piece, the unlocking piece can move between a first position and a second position, the unlocking piece is in transmission connection with the cover plate, and the unlocking piece can be controlled to move between the first position and the second position by operating the cover plate; the unlocking piece is in transmission connection with the linkage piece, and when the unlocking piece moves from the first position to the second position, the linkage piece is driven to switch from the transmission position to the disconnection position; the retraction mechanism is used for being in operative transmission connection with the second transmission part so as to drive the transmission part to move along a preset direction. The unlocking piece is connected with the cover plate in a transmission manner, so that the unlocking piece can be driven to move between the first position and the second position when the cover plate is operated, the unlocking piece is connected with the linkage piece in a transmission manner, when the unlocking piece moves from the first position to the second position, the linkage piece is driven to be switched from the transmission position to the disengaging position, and then the rollback mechanism is operated to be connected with the second transmission part in a transmission manner, the transmission piece can be driven to move along the preset direction, namely, the interruption of power transmission of the unlocking piece can be realized by operating the cover plate in the application, the operation steps are reduced, and the rollback efficiency of the transmission piece is improved.

The invention also provides an anastomat, which comprises a shell, an end effector connected with the shell, a transmission piece arranged in the shell, a driving assembly, an unlocking mechanism and a retraction mechanism; the end effector includes a movable cutting member for cutting tissue; the transmission piece can move relative to the shell, the transmission piece is used for being operably connected with the cutting component, and the transmission piece comprises a first transmission part and a second transmission part; the driving assembly comprises a linkage piece and a driving source, wherein the linkage piece is provided with a transmission position and a disconnection position, when the linkage piece is positioned at the transmission position, the linkage piece is in transmission connection with the first transmission part and is in transmission connection with the driving source, and when the linkage piece is positioned at the disconnection position, the linkage piece is disconnected with the first transmission part; the unlocking mechanism comprises an unlocking driving piece and an unlocking piece, the unlocking driving piece can move relative to the shell, the unlocking piece can move between a first position and a second position, the unlocking piece is in transmission connection with the unlocking driving piece, and the unlocking piece can be controlled to move between the first position and the second position by operating the unlocking driving piece; the unlocking piece is in transmission connection with the linkage piece, and when the unlocking piece moves from the first position to the second position, the linkage piece is driven to switch from the transmission position to the disconnection position; the retraction mechanism is used for being in operative transmission connection with the second transmission part so as to drive the transmission part to move along a preset direction. The retraction mechanism can achieve at least one of the above-described technical effects.

Drawings

Fig. 1 is a first schematic view of an interior of a stapler according to an embodiment of the present invention.

Fig. 2 is a schematic view of a stapler according to an embodiment of the present invention.

Fig. 3 is a front view of a linkage in a driving position in a stapler according to an embodiment of the present invention.

Fig. 4 is a first front view of a linkage in a disengaged position in a stapler according to an embodiment of the invention.

Fig. 5 is a front view of the anastomat according to the embodiment of the invention, wherein the cover plate and the unlocking member are overlapped with each other along the rotation axis.

Fig. 6 is a second front view of the linkage in the disengaged position of the stapler provided in accordance with an embodiment of the present invention.

Fig. 7 is a schematic view of the cooperation of the cover plate, the connecting rod and the unlocking member in the stapler according to an embodiment of the present invention.

Fig. 8 is a schematic view of a cover plate and the unlocking mechanism of a stapler according to another embodiment of the present invention.

Fig. 9 is a schematic view of an unlocking member in a stapler according to another embodiment of the present invention.

Fig. 10 is a schematic view of the engagement of the unlocking member and the linkage member in the stapler according to another embodiment of the present invention.

Fig. 11 is a second schematic view of the inside of the stapler according to an embodiment of the present invention.

Fig. 12 is a third schematic view of an interior of a stapler according to an embodiment of the invention.

Fig. 13 is a schematic view of the anastomat according to an embodiment of the present invention, wherein the axes of rotation of the cover plate, the unlocking member and the trigger are coincident.

Fig. 14 is a partial cross-sectional view of a pawl engaged with a second transmission portion of a stapler according to an embodiment of the present invention.

Fig. 15 is a schematic view of a pawl in a stapler according to an embodiment of the present invention.

Fig. 16 is a schematic view of a retraction mechanism in a stapler according to another embodiment of the present invention.

Fig. 17 is a schematic view of a retraction mechanism in a stapler according to still another embodiment of the present invention.

Fig. 18 is a schematic view of a stapler according to another embodiment of the present invention, wherein a cover is opened with respect to a housing.

Fig. 19 is a schematic view of a portion of the interior of a stapler according to another embodiment of the present invention.

Reference numerals:

100-transmission parts; 110-a first transmission; 120-a second transmission part; 200-a drive assembly; 210-linkage; 220-a drive source; 230-a drive gear; 240-elastic member; 250-rotating shaft; 300-unlocking mechanism; 310-unlocking piece; 311-a second axis of rotation; 312-bumps; 313-unlocking the drive; 320-a retraction mechanism; 321-a trigger; 322-pawl; 323 matrix; 324-a snap-on block; 325-limit table; 326-claw tip; 330-a connecting rod; 331-fourth axis of rotation; 340-mounting groove; 341-a first groove section; 342-a second trough section; 350-driving rod; 360-driving gears; 370-a retraction wheel; 380-an adapter; 400-frame; 500-a housing; 520-cover plate; 521-a first axis of rotation; 522-a third axis of rotation; 523-chute; 530-a first wire; 540-a second wire; 550-a third wire; 560-fourth wiring; 600-end effector; 610-cutting member.

Detailed Description

In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Referring to fig. 1 and 2, fig. 1 is a first schematic view of an interior of a stapler according to an embodiment of the present invention; fig. 2 is a schematic view of a stapler according to an embodiment of the present invention. An embodiment of the present invention provides an anastomat, comprising a housing 500, an end effector 600 connected with the housing 500, a transmission member 100, a driving assembly 200, an unlocking mechanism 300 and a retraction mechanism 320, wherein the transmission member 100, the driving assembly 200, the unlocking mechanism 300 and the retraction mechanism 320 are arranged in the housing 500; the housing 500 is provided with an opening for operating the retracting mechanism 320, and a cover 520 at least partially covering the opening; the end effector 600 includes a movable cutting member 610 for cutting tissue; the transmission member 100 is movable relative to the housing 500, the transmission member 100 being for operative connection with the cutting member 610, and the transmission member 100 comprising a first transmission portion 110 and a second transmission portion 120; the drive assembly 200 includes a linkage member 210 and a drive source 220, the linkage member 210 having a transmission position and a disengagement position, the linkage member 210 being in transmission connection with the first transmission portion 110 and in transmission connection with the drive source 220 when the linkage member 210 is in the transmission position, the linkage member 210 being disconnected from the first transmission portion 110 when the linkage member 210 is in the disengagement position; the unlocking mechanism 300 includes an unlocking member 310, the unlocking member 310 being movable between a first position and a second position; the unlocking piece 310 is in transmission connection with the cover plate 520, and the unlocking piece 310 can be controlled to move between a first position and a second position by operating the cover plate 520; the unlocking member 310 is in transmission connection with the linkage member 210, and when the unlocking member 310 moves from the first position to the second position, the linkage member 210 is driven to switch from the transmission position to the disengagement position; the retracting mechanism 320 is operatively connected to the second transmission portion 120 to drive the transmission member 100 to move in a predetermined direction.

Specifically, the unlocking member 310 is in driving connection with the cover plate 520, so that the unlocking member 310 can be driven to move between the first position and the second position when the cover plate 520 is operated. And the unlocking member 310 is in transmission connection with the linkage member 210, when the unlocking member 310 moves from the first position to the second position, the linkage member 210 is driven to switch from the transmission position to the disengagement position, and then the retraction mechanism 320 is operated, so that the retraction mechanism 320 is in transmission connection with the second transmission part 120, and the transmission member 100 can be driven to move along the preset direction.

When the linkage 210 is at the transmission position, the linkage 210 is in transmission connection with the first transmission portion 110, and the linkage 210 is driven by the driving source 220 to drive the transmission 100 to move, so as to implement the operation of the cutting member 610. When the linkage member 210 is at the disengaging position, the linkage member 210 is disengaged from the first transmission portion 110, and the retraction mechanism 320 can be in transmission connection with the transmission member 100, so that when the retraction mechanism 320 drives the transmission member 100 to move along the preset direction, the interference of the driving assembly 200 on the transmission member 100 can be reduced, the retraction mechanism 320 can stably drive the transmission member 100 to retract, and the reliability of the retraction mechanism 320 is improved.

Further, the linkage member 210 is a driven gear, and the first transmission portion 110 includes a plurality of first transmission teeth, and when the driven gear is in the transmission position, the driven gear is engaged with the plurality of first transmission teeth. Preferably, the driving source 220 is a motor.

Still further, the stapler further includes a frame 400, the housing 500 is mounted on the frame 400, the cover 520 is connected to the frame 400 or the housing 500, and the driving member 100 is slidably connected to the frame 400 in a direction parallel to the predetermined direction. In this embodiment, the preset direction refers to a retraction direction.

It should be noted that, the opening corresponds to the retraction mechanism 320, and the cover 520 is used for covering the opening, when the retraction mechanism 320 needs to be operated to move the transmission member 100 in a preset direction, that is, when retracting, the cover 520 needs to be opened relative to the opening, so that the retraction mechanism 320 communicates with the outside through the opening to facilitate the operation or observation of the retraction mechanism 320. In this application, when the cover 520 is operated such that the cover 520 is opened relative to the opening, the unlocking member 310 is driven to move from the first position to the second position by the action of opening the cover 520, so as to switch the linkage member 210 from the transmission position to the disengagement position.

Referring to fig. 1, 3 and 4, fig. 3 is a front view of a linkage member in a driving position in a stapler according to an embodiment of the present invention; fig. 4 is a first front view of a linkage in a disengaged position in a stapler according to an embodiment of the invention. In one embodiment, the cover 520 can rotate relative to the housing 500, and the unlocking mechanism 300 further includes a connecting member, where the cover 520 is in transmission connection with the unlocking member 310 through the connecting member; the cover 520 is configured to be rotated relative to the housing 500 to open relative to the opening, and is driven by the connector to control movement of the unlocking member 310 from the first position to the second position.

Specifically, the cover 520 is rotatably connected to the housing 500 or the frame 400, and when the cover 520 rotates relative to the housing 500 to open or close the opening, the unlocking member 310 can be driven to rotate by the connecting member, so that the unlocking member 310 moves between the first position and the second position to drive the linkage member 210 to switch between the transmission position and the release position. The setting of the connecting piece makes the rotation axis of the cover plate 520 and the rotation axis of the unlocking piece 310 have a certain distance, so that the design freedom of the two parts is increased, the space layout is convenient, the unlocking piece 310 can be arranged on one side corresponding to the opening, the movement condition of the unlocking piece 310 is observed through the opening, and the movement process of the unlocking piece 310 from the first position to the second position is accurately judged.

It should be noted that, when the cover 520 in the present application rotates relative to the housing 500 to close the opening, the unlocking member 310 can be driven to rotate by the connecting member, so that the unlocking member 310 moves from the second position to the first position, so as to drive the linkage member 210 to switch from the disengaging position to the transmitting position, so that the linkage member 210 drives the transmission member 100 to move for performing the operation, that is, the opening action of the cover 520 relative to the housing 500 does not have to perform the retracting operation, but can also be used for observing the internal structure of the stapler through the opening.

In other embodiments, the cover 520 may be made of a transparent material, so that the internal structure of the stapler can be observed when the cover 520 is not opened.

Referring to fig. 1 and 5, fig. 5 is a front view of a cover plate and an unlocking member of a stapler according to an embodiment of the present invention. In another embodiment, the unlocking member 310 can be directly in driving connection with the cover 520, i.e. the unlocking member 310 is coaxially connected with the cover 520, or the unlocking member 310 is integrally formed with the cover 520, when

When the cover 520 rotates relative to the housing 500 to open the opening, the cover 520 can drive the unlocking member 310 to rotate synchronously, so as to realize the movement of the unlocking member 310 from the first position to the second position.

Referring to fig. 1, 6 and 7, fig. 6 is a second front view of a linkage in a disengaged position in a stapler according to an embodiment of the present invention; fig. 7 is a schematic view of the cooperation of the cover plate, the connecting rod and the unlocking member in the stapler according to an embodiment of the present invention. In one embodiment, the connecting member is a connecting rod 330, one end of the connecting rod 330 is rotatably connected to the unlocking member 310, the other end is rotatably connected to the cover 520, and the rotation axis of the cover 520 relative to the housing 500 is not coincident with the rotation axis of the unlocking member 310 relative to the connecting rod 330.

Specifically, the arrangement of the rotation axis of the cover 520 relative to the housing 500 and the rotation axis of the unlocking member 310 relative to the connecting rod 330 do not coincide, so that the rotation axis of the cover 520 and the rotation axis of the unlocking member 310 can have a distance in a preset direction, and thus, the thickness of the unlocking member 310 and the size of the connecting end of the cover 520 and the housing 500 or the frame 400 are not limited without increasing the volume of the stapler, the fitting strength of the cover 520 and the housing 500 or the frame 400 is increased, and the reliability of the stapler is improved.

Further, the cover 520 is spaced from the unlocking member 310 in a preset direction relative to the rotation axis of the housing 500, and since the transmission member 100 can move in the preset direction relative to the housing 500, that is, the stapler has a sufficient size in the preset direction, the volume of the stapler is not affected by the spaced arrangement of the rotation axis of the cover 520 and the rotation axis of the unlocking member 310 in the preset direction.

In other embodiments, the connection may also be a gear.

Referring to fig. 6 and 7, in one embodiment, the unlocking member 310 is rotatably connected to the housing 500 or the frame 400, the rotation axis of the link 330 relative to the cover 520 is different from the rotation axis of the cover 520 relative to the housing 500, and the rotation axis of the link 330 relative to the unlocking member 310 is different from the rotation axis of the unlocking member 310.

Specifically, for convenience of description, the rotation axis of the cover 520 and the housing 500 or the rack 400 is defined as a first rotation axis 521, the rotation axis of the link 330 with respect to the cover 520 is defined as a third rotation axis 522, and the rotation axis of the link 330 with respect to the unlocking member 310 is defined as a fourth rotation axis 331. The third rotation axis 522 is not coaxial with the first rotation axis 521, and the fourth rotation axis 331 is not coaxial with the second rotation axis 311, so that the cover 520, the connecting rod 330 and the unlocking member 310 form a quadrilateral mechanism, that is, the cover 520 rotates relative to the housing 500, and the transmission of the unlocking member 310 can be realized through the linkage of the connecting rod 330.

On the first plane perpendicular to the first rotation axis 521, the first rotation axis 521 and the third rotation axis 522 are connected to obtain a first connection line 530, the third rotation axis 522 and the fourth rotation axis 331 are connected to obtain a second connection line 540, the fourth rotation axis 331 and the second rotation axis 311 are connected to obtain a third connection line 550, the first rotation axis 521 and the second rotation axis 311 are connected to obtain a fourth connection line 560, and the first connection line 530, the second connection line 540, the third connection line 550 and the fourth connection line 560 are enclosed to form a quadrangle, that is, a quadrangle mechanism is formed, and linkage is realized.

When the cover 520 rotates relative to the housing 500, the cover 520 forms a lever with a fulcrum falling on the first rotation axis 521, and the length of the first connecting line 530 is smaller than that of the cover 520, so that the cover 520 is a labor-saving lever, thereby achieving a labor-saving effect, and further, the cover 520 can be driven to rotate more conveniently, so that the efficiency of switching the linkage 210 from the transmission position to the release position is improved.

In another embodiment, the unlocking member 310 is slidably connected with the housing 500 or the rack 400, and the unlocking member 310, the cover plate 520 and the connecting rod 330 form a crank slider mechanism, that is, the cover plate 520 rotates relative to the housing 500 to drive the connecting rod 330 to rotate, so that the unlocking member 310 can be pushed to move from the first position to the second position.

Referring to fig. 1, 6 and 8, fig. 8 is a schematic diagram illustrating cooperation between a cover plate and an unlocking mechanism in a stapler according to another embodiment of the present invention. In another embodiment, the cover 520 is rotatable relative to the housing 500, one of the unlocking member 310 and the cover 520 is provided with a protrusion 312, the other is provided with a sliding slot 523, the protrusion 312 is accommodated in the sliding slot 523 and can slide relative to the sliding slot 523, and the cover 520 is configured to control the unlocking member 310 to move from the first position to the second position when the cover 520 is rotated relative to the housing 500 to open relative to the opening.

Specifically, the cover 520 is provided with a chute 523, the unlocking member 310 is provided with a bump 312, and the bump 312 is slidably connected with a chute wall of the chute 523, so that the cover 520 and the unlocking member 310 form a slider-crank mechanism, and when the cover 520 rotates relative to the housing 500, the unlocking member 310 can be driven to rotate through linkage.

It should be noted that, in other embodiments, the cover 520 and the unlocking member 310 may also form a crank rocker mechanism, a double-slider four-bar mechanism, etc., as long as the rotation axis of the cover 520 and the rotation axis of the unlocking member 310 are different, and the cover 520 can drive the unlocking member 310 to rotate when rotating relative to the housing 500.

Referring to fig. 1, 6 and 8, in one embodiment, the unlocking member 310 is a cam or a slider. Specifically, when the unlocking member 310 is a cam, the outer contour edge of the unlocking member 310 abuts against the linkage member 210, and when the cover plate 520 rotates relative to the housing 500 to switch the unlocking member 310 from the first position to the second position, the unlocking member 310 can push the linkage member 210 to move away from the second rotation axis, so that the linkage member 210 is disengaged from the first transmission portion 110 to switch to the disengaged position. When the unlocking member 310 is a slider, the linkage member 210 is located in the moving direction of the unlocking member 310, and when the cover plate 520 rotates relative to the housing 500 to switch the unlocking member 310 from the first position to the second position, the unlocking member 310 pushes the linkage member 210 to disengage the linkage member 210 from the first transmission portion 110 to switch to the disengaged position.

Referring to fig. 1 and 6, in one embodiment, when linkage 210 is in the disengaged position, the cam is subjected to zero torque to lock the position of linkage 210, thereby improving the reliability of the stapler.

Referring to fig. 1, 3 and 4, in one embodiment, the driving assembly 200 further includes an elastic member 240, where the elastic member 240 is configured to apply a pushing force to the linkage 210 to drive the linkage 210 to return.

Specifically, the driving assembly 200 further includes a rotating shaft 250, the rotating shaft 250 is connected to the frame 400, the linkage member 210 is sleeved on the rotating shaft 250, the elastic member 240 is sleeved on the rotating shaft 250, one end of the elastic member is connected to the frame 400, and the other end of the elastic member abuts against the linkage member 210. When the linkage member 210 is located at the transmission position, the elastic member 240 can apply a pushing force to the linkage member 210, so that the linkage member 210 is stably located at the current position to be stably engaged with the first transmission portion 110. When the linkage 210 is switched from the transmission position to the release position, the elastic member 240 is capable of being compressed, thereby providing a moving space for the movement of the linkage 210 in the axial direction of the rotation shaft 250, and at the same time, providing a restoring force to the linkage 210, the linkage 210 is capable of being returned under the action of the elastic member 240 when the unlocking member 310 is moved from the second position to the first position to release the linkage 210. Preferably, the elastic member 240 is a spring.

Referring to fig. 1, fig. 4, fig. 6, fig. 9, and fig. 10, fig. 9 is a schematic view of an unlocking member in a stapler according to another embodiment of the present invention; fig. 10 is a schematic view of the engagement of the unlocking member and the linkage member in the stapler according to another embodiment of the present invention. In yet another embodiment, the unlocking member 310 is a driving wheel, a circumferential wheel wall of the driving wheel is provided with a mounting groove 340, the mounting groove 340 comprises a first groove section 341 and a second groove section 342 extending along the circumferential direction of the driving wheel, and the distance between the opposite axial end faces of the first groove section 341 and the second groove section 342 is unequal relative to one axial end face of the driving wheel; the driving assembly 200 further comprises a rotating shaft 250 penetrating through the linkage piece 210, wherein the rotating shaft 250 penetrates through the mounting groove 340 and is in sliding connection with the mounting groove 340; when the unlocking member 310 moves between the first position and the second position, the rotating shaft 250 moves in the first groove section 341 and the second groove section 342 to drive the linkage member 210 to move along the axial direction of the driving wheel so as to drive the linkage member 210 to switch between the transmission position and the disengagement position.

Specifically, when the unlocking member 310 is located at the first position, the rotating shaft 250 corresponds to the first groove segment 341, and when the unlocking member 310 is located at the second position, the rotating shaft 250 corresponds to the second groove segment 342, and the first groove segment 341 is located at a side close to the transmission member 100 relative to the second groove segment 342. When the unlocking member 310 moves from the first position to the second position, the rotating shaft 250 moves from the first groove section 341 to the second groove section 342, so that the unlocking member 310 is driven to move away from the transmission member 100, and the linkage member 210 is separated from the first transmission portion 110, so as to switch to the separation position. Preferably, the axial direction of the rotation shaft 250 is perpendicular to the preset direction.

Referring to fig. 9 and 10, in one embodiment, in the axial direction of the unlocking member 310, the extending direction of the first groove section 341 and the extending direction of the second groove section 342 are parallel, and are staggered, and the first groove section 341 and the second groove section 342 are transited through an arc section.

In another embodiment, the first slot segment 341 is continuous with the second slot segment 342, and further, the mounting slot 340 is a chute.

Referring to fig. 1, 11 and 12, fig. 11 is a second schematic view of an interior of a stapler according to an embodiment of the present invention; fig. 12 is a third schematic view of an interior of a stapler according to an embodiment of the invention. In one embodiment, the retraction mechanism 320 includes a pawl 322 and a trigger 321, the trigger 321 can rotate relative to the housing 500, the pawl 322 is mounted on the trigger 321, the pawl 322 is operatively abutted to the second transmission portion 120, and the pawl 322 is driven by the trigger 321 to drive the transmission member 100 to move along a preset direction.

Specifically, the second transmission 120 includes a plurality of second transmission teeth, and the pawl 322 is configured to mate with the plurality of second transmission teeth. When the linkage 210 is switched to the release position, the trigger 321 can be operated to enable the pawl 322 to abut against the plurality of second transmission teeth, so that when the trigger 321 is operated to rotate, the pawl 322 can be driven to drive the transmission 100 to move along the preset direction.

Referring to fig. 1, 5 and 13, fig. 13 is a schematic view of the overlapping of the rotation axes of the cover plate, the unlocking member and the trigger in the stapler according to an embodiment of the invention. In one of the embodiments, the rotation axis of the trigger 321 is coaxially fixed with the rotation axis of the unlocking member 310, so that the structure can be simplified. When the rotation axis of the unlocking member 310 is different from the rotation axis of the cover 520, the first rotation axis 521 of the cover 520 is spaced from the second rotation axis 311 of the unlocking member 310, so that the first rotation axis 521 is spaced from the rotation axis of the trigger 321, thereby increasing the movement space of the trigger 321, making the reciprocating range of the trigger 321 larger, and improving the retraction efficiency of the stapler. When the rotation axis of the unlocking member 310 is coaxial with the rotation axis of the cover 520, the rotation axis of the unlocking member 310, the rotation axis of the cover 520 and the rotation axis of the trigger 321 are coaxially fixed, further simplifying the structure.

In other embodiments, the axis of rotation of the trigger 321 and the axis of rotation of the release member 310 may be different.

Referring to fig. 1, 11, 12, 14 and 15, fig. 14 is a partial cross-sectional view illustrating a pawl engaged with a second transmission portion in a stapler according to an embodiment of the present invention; fig. 15 is a schematic view of a pawl in a stapler according to an embodiment of the present invention. In one embodiment, the pawl 322 includes a base 323, a snap block 324 and a pawl tip 326, the base 323 is rotatably connected to the trigger 321, the pawl tip 326 is disposed on a side of the base 323 facing the transmission member 100 and is used for being matched with a plurality of second transmission teeth, the snap block 324 is disposed on the base 323, a limit table 325 is protruding from the frame 400, and the limit table 325 is used for supporting the snap block 324; the claw tip 326 has an initial position and a matching position, when the claw tip 326 is located at the initial position, the overlap block 324 is overlapped on the limit table 325, a gap is formed between the claw tip 326 and the transmission piece 100, when the claw tip 326 is located at the matching position, the overlap block 324 is separated from the limit table 325, the claw tip 326 abuts against the second transmission tooth 120, and the operation trigger 321 rotates to drive the claw 322 to drive the transmission piece 100 to move unidirectionally so as to drive the transmission piece 100 to retract.

Specifically, referring to FIG. 11, when the linkage 210 is in the drive position, the pawl 326 is in the home position so as not to interfere with the drive 100. Referring to fig. 12, when the linkage 210 is in the disengaged position, the trigger 321 is rotated clockwise to drive the pawl 322 to move leftwards, so that the overlap block 324 slides out of the limit table 325 and falls onto the transmission member 100 to abut against the second transmission gear 120. Referring to fig. 12 of the drawings, by continuing to rotate the trigger 321 clockwise, the pawl 322 can be pushed to move leftwards, and when the trigger 321 is rotated anticlockwise, the pawl 322 unidirectionally controls the movement of the transmission member 100, so that interference is not caused to the transmission member 100, and preparation is made for the trigger 321 to rotate clockwise again, so as to drive the transmission member 100 to retract.

Referring to fig. 1 and 16, fig. 16 is a schematic view of a retraction mechanism in a stapler according to another embodiment of the present invention. In another embodiment, the retracting mechanism 320 includes a driving lever 350 and a driving gear 360, the driving lever 350 is rotatably connected to the housing 500 or the rack 400, the driving gear 360 is in threaded connection with the driving lever 350, the driving gear 360 has a first mating position and a second mating position, and the driving gear 360 can be driven to switch from the first mating position to the second mating position by operating the rotation of the driving lever 350 to engage with the second transmission part 120 so as to drive the transmission member 100 to move along the preset direction.

Specifically, when the driving gear 360 is located at the first position, the driving gear 360 has a certain clearance with the transmission member 100, so that when the linkage member 210 is located at the transmission position, no interference is caused to the movement of the transmission member 100 driven by the linkage member 210. When the operation driving lever 350 rotates, the driving gear 360 can be driven to move in the axial direction of the driving lever 350 by the screw transmission so that the driving gear 360 approaches the transmission member 100. When the driving gear 360 is switched from the first position to the second position, the driving gear 360 is engaged with the second transmission portion 120, and the driving gear 360 moves to the end of the thread on the driving rod 350, so that the thread transmission between the driving gear 360 and the driving rod 350 is interrupted, and when the driving rod 350 is operated to rotate further, the driving gear 360 and the driving rod 350 can rotate synchronously, thereby driving the transmission member 100 to retract.

Further, the retraction assembly further includes at least one guide rod, each guide rod is parallel to the driving rod 350 and is disposed at the housing 500 or the frame 400 at intervals, at least one guide hole is disposed on the driving gear 360, and when the driving gear 360 is located at the first position, each guide rod can penetrate through the guide hole, so that the rotation of the driving gear 360 can be limited, and the driving gear 360 is stably close to the transmission member 100 along the extending direction of the driving rod 350.

Referring to fig. 1 and 17, fig. 17 is a schematic view of a retraction mechanism in a stapler according to another embodiment of the present invention. In yet another embodiment, the retraction mechanism 320 includes a retraction wheel 370 and an adapter 380, wherein the retraction wheel 370 is rotatably connected to the housing 500 or the frame 400, the adapter 380 is wound around the periphery of the retraction wheel 370, and two ends of the adapter 380 are respectively connected to two ends of the transmission member 100. When the linkage 210 is in the disengaged position, the adaptor 380 can be driven to move by friction force by operating the retraction wheel 370 to rotate around the self axis so as to drive the transmission member 100 to move, so as to realize retraction. Preferably, the adapter 380 is a pull cord.

Referring to fig. 1, in one embodiment, the driving assembly 200 further includes a driving gear 230, the driving gear 230 is connected to the power output end of the driving source 220, and the driving gear 230 is used to mesh with the linkage 210, so as to implement a driving connection between the driving source 220 and the linkage 210.

In addition to the above, in another embodiment, the present invention also provides a stapler.

Referring to fig. 1, 18 and 19, fig. 18 is a schematic view of a cover plate opened relative to a housing in a stapler according to another embodiment of the invention. Fig. 19 is a schematic view of a portion of the interior of a stapler according to another embodiment of the present invention. Stapler housing 500, end effector 600 connected to housing 500, transmission 100, drive assembly 200, unlocking mechanism 300, and retraction mechanism 320 disposed within housing 500; the end effector 600 includes a movable cutting member 610 for cutting tissue; the transmission member 100 is movable relative to the housing 500, the transmission member 100 being for operative connection with the cutting member 610, and the transmission member 100 comprising a first transmission portion 110 and a second transmission portion 120; the drive assembly 200 includes a linkage member 210 and a drive source 220, the linkage member 210 having a transmission position and a disengagement position, the linkage member 210 being in transmission connection with the first transmission portion 110 and in transmission connection with the drive source 220 when the linkage member 210 is in the transmission position, the linkage member 210 being disconnected from the first transmission portion 110 when the linkage member 210 is in the disengagement position; the unlocking mechanism 300 comprises an unlocking drive 313 and an unlocking member 310, the unlocking drive being movable relative to the housing 500, the unlocking member 310 being movable between a first position and a second position; the unlocking piece 310 is in transmission connection with the cover plate 520, and the unlocking piece 310 can be controlled to move between a first position and a second position by operating the unlocking driving piece 313; the unlocking member 310 is in transmission connection with the linkage member 210, and when the unlocking member 310 moves from the first position to the second position, the linkage member 210 is driven to switch from the transmission position to the disengagement position; the retracting mechanism 320 is operatively connected to the second transmission portion 120 to drive the transmission member 100 to move in a predetermined direction.

Specifically, the unlocking member 310 is in transmission connection with the unlocking driving member 313, so that the unlocking member 310 can be driven to move between the first position and the second position when the unlocking driving member 313 is operated. And the unlocking piece 310 is in transmission connection with the linkage piece 210, when the unlocking piece 310 moves from the first position to the second position, the linkage piece 210 is driven to switch from the transmission position to the disengaging position, and then the retraction mechanism 320 is operated, so that the retraction mechanism 320 is in transmission connection with the second transmission part 120, and the transmission piece 100 can be driven to move along the preset direction, thereby realizing convenient retraction of the anastomat.

It should be noted that, in this embodiment, the unlocking driving member 313 and the unlocking member 310 are in transmission connection with the unlocking driving member, that is, the unlocking driving member 313 may be the cover plate 520, or may be other components independent from the cover plate, for example, a swing arm rotationally connected to the frame 400 or the housing 500, or a key slidingly connected to the frame 400 or the housing 500, where the cover plate 520 only serves to cover the opening.

It should be noted that, the retraction mechanism 320 in this embodiment has the same structure as the retraction mechanism 320 in the above embodiment, and will not be described again.

Referring to fig. 5, 6, 7 and 19, in one embodiment, the unlocking driving member can rotate or move relative to the housing, and the unlocking member includes a cam or a slider.

Specifically, the unlocking member 313 drives the unlocking member to rotate or move, so that the linkage member 210 can be pushed to move from the transmission position to the release position. The specific transmission connection manner between the unlocking driving member 313 and the unlocking member 310 is the same as that of the above embodiment, and will not be described again.

Referring to fig. 1, fig. 4, fig. 6, fig. 9, and fig. 10, fig. 9 is a schematic view of an unlocking member in a stapler according to another embodiment of the present invention; fig. 10 is a schematic view of the engagement of the unlocking member and the linkage member in the stapler according to another embodiment of the present invention. In yet another embodiment, the unlocking driving member 313 is rotatable relative to the housing 500, the unlocking member 310 is a driving wheel, a circumferential wheel wall of the driving wheel is provided with a mounting groove 340, the mounting groove 340 includes a first groove section 341 and a second groove section 342 extending along a circumferential direction of the driving wheel, and relative to one axial end face of the driving wheel, the distance between the opposite axial end faces of the first groove section 341 and the second groove section 342 is unequal; the driving assembly 200 further comprises a rotating shaft 250 penetrating through the linkage piece 210, wherein the rotating shaft 250 penetrates through the mounting groove 340 and is in sliding connection with the mounting groove 340; when the unlocking member 310 moves between the first position and the second position, the rotating shaft 250 moves in the first groove section 341 and the second groove section 342 to drive the linkage member 210 to move along the axial direction of the driving wheel so as to drive the linkage member 210 to switch between the transmission position and the disengagement position. Specifically, in the present embodiment, the specific transmission connection manner between the unlocking driving member 313 and the unlocking member 310 is the same as that of the above embodiment, and will not be described again.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims

1. The anastomat is characterized by comprising a shell (500), an end effector (600) connected with the shell (500), a transmission piece (100), a driving assembly (200), an unlocking mechanism (300) and a retraction mechanism (320), wherein the transmission piece (100), the driving assembly (200), the unlocking mechanism (300) and the retraction mechanism are arranged in the shell (500);

the housing (500) is provided with an opening for operating the retraction mechanism (320), and a cover plate (520) at least partially covering the opening; the end effector (600) includes a movable cutting member (610) for cutting tissue; -the transmission member (100) is movable relative to the housing (500), the transmission member (100) being for operative connection with the cutting member (610), and the transmission member (100) comprising a first transmission portion (110) and a second transmission portion (120);

The drive assembly (200) comprises a linkage (210) and a drive source (220), the linkage (210) has a transmission position and a disconnection position, when the linkage (210) is in the transmission position, the linkage (210) is in transmission connection with the first transmission part (110) and in transmission connection with the drive source (220), and when the linkage (210) is in the disconnection position, the linkage (210) is disconnected from the first transmission part (110);

the unlocking mechanism (300) comprises an unlocking piece (310), the unlocking piece (310) can move between a first position and a second position, the unlocking piece (310) is in transmission connection with the cover plate (520), and the unlocking piece (310) can be controlled to move between the first position and the second position by operating the cover plate (520); the unlocking piece (310) is in transmission connection with the linkage piece (210), and when the unlocking piece (310) moves from the first position to the second position, the linkage piece (210) is driven to be switched from the transmission position to the disconnection position; the retraction mechanism (320) is configured to be in operative driving connection with the second transmission portion (120) to drive the transmission member (100) to move in a predetermined direction.

2. The stapler according to claim 1, wherein said cover (520) is rotatable with respect to said housing (500), said unlocking mechanism (300) further comprising a connection member, said cover (520) being in driving connection with said unlocking member (310) through said connection member;

the cover plate (520) is configured to be rotated relative to the housing (500) to open relative to the opening, and is driven by the connector to control movement of the unlocking member (310) from the first position to the second position.

3. The stapler according to claim 2, wherein said connecting member is a connecting rod (330), one end of said connecting rod (330) is rotatably connected to said unlocking member (310), the other end is rotatably connected to said cover plate (520), and the rotation axis of said cover plate (520) with respect to said housing (500) is not coincident with the rotation axis of said unlocking member (310) with respect to said connecting rod (330).

4. The stapler according to claim 1, wherein said cover plate (520) is rotatable with respect to said housing (500), one of said unlocking member (310) and said cover plate (520) is provided with a projection (312), the other is provided with a chute (523), said projection (312) is accommodated in said chute (523) and is slidable with respect to said chute (523), said cover plate (520) is configured to control movement of said unlocking member (310) from said first position to said second position when said cover plate (520) is rotated with respect to said housing (500) to open with respect to said opening.

5. The stapler according to any one of claims 1-4, wherein the unlocking member (310) comprises a cam or a slider.

6. The stapler according to claim 5, wherein said driving assembly (200) further comprises an elastic member (240), said elastic member (240) being configured to exert a pushing force on said linkage member (210) to drive said linkage member (210) to return.

7. The stapler according to any one of claims 1-4, wherein said unlocking member (310) is a driving wheel, a circumferential wheel wall of said driving wheel being provided with a mounting groove (340), said mounting groove (340) comprising a first groove section (341) and a second groove section (342) extending circumferentially along said driving wheel, the distance of said first groove section (341) and said second groove section (342) being unequal with respect to one axial end face of said driving wheel;

the driving assembly (200) further comprises a rotating shaft (250) penetrating through the linkage piece (210), and the rotating shaft (250) penetrates through the mounting groove (340) and is in sliding connection with the mounting groove (340);

the shaft (250) moves between the first and second groove sections (341, 342) as the drive wheel moves between the first and second positions, thereby driving the linkage (210) to move axially of the drive wheel to drive the linkage (210) to switch between the driven and disengaged positions.

8. The stapler according to any one of claims 1-4, wherein said retraction mechanism (320) comprises a pawl (322) and a trigger (321), said trigger (321) being rotatable with respect to said housing (500), said pawl (322) being mounted to said trigger (321), said pawl (322) being operatively abutted to said second transmission portion (120), said pawl (322) being driven by said trigger (321) to drive said transmission member (100) to move in a predetermined direction.

9. The stapler according to any one of claims 1-4, wherein said retraction mechanism (320) comprises a driving lever (350) and a driving gear (360), said driving gear (360) being threadedly coupled to said driving lever (350), said driving gear (360) having a first mating position and a second mating position, said driving gear (360) being drivable by operating said driving lever (350) to rotate axially about itself to switch from said first mating position to said second mating position, so as to engage said driving gear (360) with said second transmission portion (120) for driving said transmission member (100) to move in a predetermined direction.

10. The anastomat according to any one of claims 1 to 4, wherein the retraction mechanism (320) comprises a retraction wheel (370) and an adapter (380), the adapter (380) is wound around the periphery of the retraction wheel (370), two ends of the adapter (380) are respectively connected to two ends of the transmission member (100), and the rotation of the retraction wheel (370) around the own axis can drive the adapter (380) to drive the transmission member (100) to move along a preset direction.

11. The anastomat is characterized by comprising a shell (500), an end effector (600) connected with the shell (500), a transmission piece (100), a driving assembly (200), an unlocking mechanism (300) and a retraction mechanism (320), wherein the transmission piece (100), the driving assembly (200), the unlocking mechanism (300) and the retraction mechanism are arranged in the shell (500);

the end effector (600) includes a movable cutting member (610) for cutting tissue; the transmission member (100) is movable relative to the housing (500), the transmission member (100) is for operative connection with the cutting member (610), and the transmission member (100) comprises a first transmission portion (110) and a second transmission portion;

the unlocking mechanism (300) comprises an unlocking driving piece (313) and an unlocking piece (310), the unlocking driving piece (313) can move relative to the shell (500), the unlocking piece (310) can move between a first position and a second position, the unlocking piece (310) is in transmission connection with the unlocking driving piece (313), and the unlocking piece (310) can be controlled to move between the first position and the second position by operating the unlocking driving piece (313); the unlocking piece (310) is in transmission connection with the linkage piece (210), and when the unlocking piece (310) moves from the first position to the second position, the linkage piece (210) is driven to be switched from the transmission position to the disconnection position; the retraction mechanism (320) is configured to be in operative driving connection with the second transmission portion (120) to drive the transmission member (100) to move in a predetermined direction.

12. The stapler according to claim 11, wherein the unlocking drive (313) is rotatable or movable with respect to the housing (500), the unlocking member (310) comprising a cam or a slider.

13. The stapler according to claim 12, wherein said driving assembly (200) further comprises an elastic member (240), said elastic member (240) being configured to exert a pushing force on said linkage member (210) to drive said linkage member (210) to return.

14. The stapler according to any one of claims 11-13, wherein said unlocking member (313) is rotatable with respect to said housing (500), said unlocking member (310) is a driving wheel, a circumferential wheel wall of said driving wheel being provided with a mounting groove (340), said mounting groove (340) comprising a first groove section (341) and a second groove section (342) extending circumferentially along said driving wheel, the distance of said first groove section (341) and said second groove section (342) with respect to one axial end face of said driving wheel being unequal;

15. The stapler according to any one of claims 11-13, wherein said retraction mechanism (320) comprises a pawl (322) and a trigger (321), said trigger (321) being rotatable with respect to said housing (500), said pawl (322) being mounted to said trigger (321), said pawl (322) being operatively abutted to said second transmission portion (120), said pawl (322) being driven by said trigger (321) to drive said transmission member (100) to move in a predetermined direction.

16. The stapler according to any one of claims 11-13, wherein said retraction mechanism (320) comprises a driving lever (350) and a driving gear (360), said driving gear (360) being threadedly coupled to said driving lever (350), said driving gear (360) having a first mating position and a second mating position, said driving gear (360) being drivable by operating said driving lever (350) to rotate axially about itself to switch from said first mating position to said second mating position, so as to engage said driving gear (360) with said second transmission portion (120) for driving said transmission member (100) to move in a predetermined direction.

17. The anastomat according to any one of claims 11-13, wherein the retraction mechanism (320) comprises a retraction wheel (370) and an adapter (380), the adapter (380) is wound around the periphery of the retraction wheel (370), two ends of the adapter (380) are respectively connected to two ends of the transmission member (100), and the rotation of the retraction wheel (370) around the own axis can drive the adapter (380) to drive the transmission member (100) to move along a preset direction.