CN110313964B

CN110313964B - Anastomat

Info

Publication number: CN110313964B
Application number: CN201910674174.9A
Authority: CN
Inventors: 代润林; 李康
Original assignee: Chongqing Meiko Medical Technology Co ltd
Current assignee: Chongqing Meiko Medical Technology Co ltd
Priority date: 2019-07-25
Filing date: 2019-07-25
Publication date: 2024-06-14
Anticipated expiration: 2039-07-25
Also published as: CN110313964A

Abstract

The invention discloses an anastomat, which comprises a shell component, a nail pushing component, an opening and closing component and a power mechanism, wherein only one power component for inputting power is arranged in the power mechanism, the power component is used for driving the opening and closing component and the nail pushing component, and in single anastomosis action, the power component sequentially passes through the maximum opening position, the closing position, the nail pushing starting position and the nail pushing ending position of the anastomat under the action of external force, so that the nail pushing component starts to push nails after the opening and closing component is closed in place. The stapler provided by the invention has only one power piece, and the power piece is controlled to enable the stapler to pass through the maximum opening position, the stapler closing position, the staple pushing starting position and the staple pushing ending position of the stapler, so that the closing and staple pushing actions of the stapler are realized, the staple pushing actions can be ensured to be started after the stapler is completely closed, the condition that the instrument is fired when the instrument is not closed in place is avoided, and the reliability of the stapler is improved.

Description

Anastomat

Technical Field

The invention belongs to medical equipment, and particularly relates to an anastomat.

Background

The tubular anastomat is a surgical instrument which is commonly used for performing end-to-end, end-to-side and side-to-side anastomosis of the digestive tract in the digestive tract reconstruction operations of esophagus, stomach, intestine and the like at present. The tubular anastomat adopts the working principle of a stapler, and realizes the suturing of visceral organs or tissue incisions in operation by nailing suturing nails which are staggered along the circumferential direction on tissues; at the same time, the annular cutting knife inside the suture line is utilized to cut off the tissue or viscera at the suture position. The tubular anastomat has the characteristics of regular suture, attractive incision, rapid operation process, firm suture, good hemostatic effect, good blood circulation of the suture opening and the like.

At present, a common tubular anastomat on the market mostly adopts a structure form of manually closing tissues and cutting and suturing by means of manual firing, referring to fig. 20, 21 and 22, the common tubular anastomat controls the opening and closing of an instrument by rotating a tail rotary piece 03, and controls the firing of staples by a firing handle 02. However, the reliability of the safety mechanism is not high, and the early firing is still easy to cause under the following three conditions:

firstly, when the instrument is not closed in place, the anastomat can be fired in advance as long as the pressure quantity is enough;

Secondly, the safety bar fails and cannot prop against the firing handle, and even if the instrument is not closed in place, if the firing handle is pressed down by chance, the instrument can be fired in advance;

thirdly, before the instrument is not closed, if the safety bar is in a retracted state, the instrument can be fired in advance.

Disclosure of Invention

The invention mainly aims to provide an anastomat, so as to avoid the early firing under the condition that the instrument is not closed in place.

To achieve the above object and other related objects, the present invention provides the following technical solutions:

The utility model provides an anastomat, includes shell subassembly, push pin subassembly, switching subassembly and power unit, shell subassembly include the casing and with the outer tube that the casing link up, push pin subassembly and switching subassembly all set up in the shell subassembly, switching subassembly is through following the flexible switching that realizes the anastomat of outer tube, push pin subassembly is through following outer tube reciprocating motion realizes pushing pin and suturing nail breaking away from, only be provided with a power piece that is used for the input power in the power unit, the power piece is used for driving switching subassembly with push pin subassembly, in single anastomat action, the power piece is passed through anastomat maximum open position, anastomat closed position, push pin start position and push pin end position in proper order under the exogenic action, make the switching subassembly closed in place the push pin subassembly just begins the push pin action, wherein, push pin start position with anastomat closed position coincidence or push pin start position sets up between anastomat closed position and push pin end position.

Optionally, the power mechanism includes:

The power piece reciprocates relative to the shell under the action of external force,

The connecting rod mechanism is used for enabling the opening and closing assembly to reciprocate along with the power piece to realize the opening and closing of the anastomat when the power piece is positioned between the maximum opening position of the anastomat and the closing position of the anastomat, and is used for enabling the opening and closing assembly to be in a closing state when the power piece is positioned between the nail pushing initial position and the nail pushing final position; and

A reverse toggle mechanism for toggling the push pin assembly in reverse motion with the power member when the power member is between the push pin start position and the push pin end position;

the connecting rod mechanism is arranged between the power piece and the opening and closing assembly, and the reverse stirring structure is arranged between the power piece and the nail pushing assembly.

Optionally, the linkage mechanism includes:

A driving arm hinged to the power member;

a driven arm hinged to the opening and closing assembly;

A first hinge pin for hinging the driving arm and the driven arm; and

The guide groove comprises a locking section and an arc section, the locking section is used for locking the connecting rod mechanism to enable the opening and closing assembly to move along with the power piece, the locking section is a straight line section, the arc section is used for unlocking the connecting rod mechanism and guiding the driven arm to rotate around the static opening and closing assembly, and the guide groove is arranged on the shell;

Wherein the first hinge pin is arranged in the guide groove and slides along the guide groove.

Optionally, the power piece is a push rod, and the push rod is connected with the driving mechanism.

Optionally, the driving mechanism includes a motor, a transmission mechanism for converting the rotational motion output by the motor into the linear motion of the push rod, the motor and the transmission mechanism are disposed on the housing, and the motor is connected with a controller for controlling the motor.

Optionally, the reverse toggle structure includes:

The rotary part is rotatably arranged on the shell, the rotary part is provided with an avoidance part for avoiding the power part when the power part is positioned between the maximum opening position of the anastomat and the closing position of the anastomat, the rotary part is provided with a first force application part for contacting the power part and a second force application part for contacting the nail pushing assembly, and the directions of the received moments of the first force application part and the second force application part on the rotary part are opposite; and

And the nail pushing blocking part is arranged on the power piece, and when the power piece is positioned between the nail pushing starting position and the nail pushing ending position, the nail pushing blocking part is propped against the first force applying part to enable the second force applying part to be propped against the nail pushing assembly.

Optionally, the pin pushing gear part is a second hinge pin for hinging the link mechanism and the power piece.

Optionally, the rotating member includes:

A central portion;

The first force arm is provided with a first force applying part, and the avoiding part is arranged on the first force arm; and

The second force arm is provided with the second force applying part.

Optionally, the avoiding part is a groove formed at the outer end of the first force arm, and the groove is matched with the outline of the power piece, so that the first force arm surrounds the periphery of the power piece, and two first force applying parts which are symmetrical with each other are formed on the first force arm.

Optionally, the nail pushing assembly is provided with a nail pushing force input part, and the second force part is propped against the nail pushing force input part when the power piece is positioned between the nail pushing starting position and the nail pushing ending position.

Optionally, an auxiliary guiding structure for guiding the nail pushing force input part is arranged on the shell.

Optionally, the pushing force input part is hinged on the pushing assembly.

Optionally, the stapler further comprises a return spring for resetting the ejector pin assembly, the return spring being arranged between the ejector pin assembly and the outer tube.

Optionally, the nail pushing assembly is sleeved outside the opening and closing assembly, the outer tube is sleeved outside the nail pushing assembly, a first limiting part for installing a spring is arranged on the nail pushing assembly, a second limiting part is arranged on the outer tube, the return spring is a compression spring, one end of the return spring is propped against the first limiting part, and the other end of the return spring is propped against the second limiting part.

The stapler provided by the invention has only one power piece, and the closing and the nail pushing actions of the stapler can be realized only by controlling the power piece to enable the power piece to pass through the maximum opening position, the closing position, the nail pushing starting position and the nail pushing ending position of the stapler, and the nail pushing actions can be ensured to be started after the stapler is completely closed, so that the condition that the instrument is not closed in place and is triggered is avoided, and the reliability of the stapler is improved.

Drawings

FIG. 1 is an exploded view of an exemplary middle housing assembly, opening and closing assembly and staple pusher assembly of the stapler of the present invention;

FIG. 2 is a schematic view of an exemplary internal structure of the stapler of the present invention in a maximum open position of the stapler;

FIG. 3 is a schematic view of an exemplary internal structure of the stapler of the present invention in a closed position (staple ejection start position) of the stapler;

FIG. 4 is a schematic view of an exemplary internal structure of the stapler of the present invention in a staple pushing closed position;

FIG. 5 is a view showing an exemplary arrangement of guide slots within a housing of the stapler of the present invention;

FIG. 6 is an enlarged view of a portion of FIG. 2;

FIG. 7 is an enlarged view of a portion of FIG. 3;

FIG. 8 is an enlarged view of a portion of FIG. 4;

FIG. 9 is a schematic diagram of an exemplary configuration of a rotating member;

FIG. 10 is a schematic diagram showing the operation of the linkage mechanism when the power member of FIGS. 2,3 and 4 is in different positions;

FIG. 11 is a schematic diagram showing the corresponding positions of the linkage mechanism of FIG. 10 when the power member is at the maximum open position A of the stapler;

FIG. 12 is a schematic view of the linkage mechanism of FIG. 10 in a closed position B (staple ejection start position C) of the stapler;

FIG. 13 is a schematic diagram showing the corresponding positions of the connecting rod structure of the power member of FIG. 10 in the end position D of the push pin;

FIG. 14 is a schematic view of an exemplary configuration of a drive mechanism;

FIG. 15 is a schematic diagram showing the operation of the linkage structure with the power member in a different position in another example;

FIG. 16 is a schematic view showing the position of the linkage mechanism of FIG. 15 when the power member is at the maximum open position A of the stapler;

FIG. 17 is a schematic view of the corresponding positions of the linkage mechanism of FIG. 15 with the power member in the closed position B of the stapler;

FIG. 18 is a schematic diagram showing the corresponding positions of the linkage mechanism of the power member of FIG. 15 in the start position C of the push pin;

FIG. 19 is a schematic view showing the corresponding positions of the linkage mechanism of the power member of FIG. 15 in the end-of-push-pin position D;

FIG. 20 is a state diagram of a conventional stapler when the stapler is opened;

FIG. 21 is a view of a prior art stapler when closed and fired;

Fig. 22 is a state diagram showing the situation that the safety lever is erroneously retracted when the conventional stapler is opened.

The reference numerals in the embodiments include:

maximum opening position A of anastomat, closing position B of anastomat, push nail starting position C, push nail ending position D,

The device comprises a shell component 1, a nail pushing component 2, an opening and closing component 3, a power mechanism 4 and a return spring 5;

the housing 11, the outer tube 12, the auxiliary guide structure 111, the second limiting portion 121, the first auxiliary guide groove 111a, the second auxiliary guide groove 111b;

A nail pushing force input part 21 and a first limit part 22;

A nail supporting seat 31;

A power member 41, a link mechanism 42, a reverse toggle structure 43, and a drive mechanism 44;

A driving arm 421, a driven arm 422, a first hinge pin 423, a guide groove 424, a locking segment 424a, a circular arc segment 424b, a fifth hinge pin 429;

The intermediate link arm 425, the third hinge pin 426, the fourth hinge pin 427, the double pin guide groove, the straight groove 428a, the first sub-circular arc groove 428b, the second sub-circular arc groove 428c, the third sub-circular arc groove 428d;

the rotating member 431, the escape portion 431a, the first force portion 431b, the second force portion 431c, the center portion 4311, the first force arm 4312, and the second force arm 4313;

a push pin gear 432a, a second hinge pin 432;

Motor 441, controller 442.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the invention may be practiced without one or more of these details. In other instances, well-known features have not been described in detail in order to avoid obscuring the invention.

It should be understood that the present invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, like numbers refer to like elements throughout.

Referring to fig. 1 to 4, the anastomat of the embodiment comprises a shell component 1, a nail pushing component 2, an opening and closing component 3 and a power mechanism 4, wherein the shell component 1 comprises a shell 11 and an outer tube 12 communicated with the shell, the nail pushing component 2 and the opening and closing component 3 are both arranged in the shell component 1, the opening and closing component 3 stretches out and draws back along the outer tube 12 to realize opening and closing of the anastomat, and the nail pushing component 2 reciprocates along the outer tube 12 to realize separation of nails and stitching nails.

In this embodiment, with reference to fig. 1 to 8 and fig. 10 to 12, only one power piece 41 for inputting power is provided in the power mechanism 4, the power piece 41 is used for driving the opening and closing assembly 3 and the nail pushing assembly 2, and in a single anastomosis action, the power piece 41 sequentially passes through the maximum opening position a of the anastomat, the closing position B of the anastomat, the nail pushing start position C and the nail pushing end position D under the action of external force, so that the nail pushing assembly 2 starts to push nails after the opening and closing assembly 3 is closed in place.

When the anastomat is anastomat, the power piece 41 is firstly moved to the maximum opening position A of the anastomat, so that the anastomat is in the maximum opening state (namely, the nail supporting seat 31 on the opening and closing assembly 3 is in the position farthest from the outer tube 12); then, the power piece 41 is driven to move towards the anastomat closing position B to compress tissues to be anastomosed, in the moving process, the power piece 41 drives the opening and closing assembly to move (namely, the nail supporting seat 31 moves towards the outer tube 12), and when the power piece 41 passes through the anastomat closing position B, the anastomat is completely closed; the power piece 41 continues to move, when the power piece 41 moves to the nail pushing initial position C, the power piece 41 drives the nail pushing assembly 2 to push nails (namely, start to fire), and when the power piece 41 moves to the nail pushing final position D, the nail pushing is completed (the firing is completed).

In this embodiment, the start position C of the push pin coincides with the closing position B of the stapler, so that when the power member 41 moves to the closing position B of the stapler, the push pin starts, that is, the stapler starts to be pushed while being completely closed. In other embodiments, referring to fig. 15-19, a staple pushing initiation position C is provided between the stapler-closing position B and the staple pushing termination position D, such that the staple pushing action is performed after a time interval following the completion of the stapler closure.

In some embodiments, referring to fig. 2-12 in combination, the power mechanism 4 includes:

The power piece 41, the power piece 41 reciprocates relative to the shell 11 under the action of external force;

A link mechanism 42 for reciprocating the opening and closing assembly 3 with the power member 41 to open and close the stapler when the power member 41 is between the maximum opening position a and the closing position B of the stapler, and for closing the opening and closing assembly 3 when the power member 41 is between the staple pushing initiation position C and the staple pushing termination position D; and

A reverse toggle mechanism 43 for toggling the push pin assembly 2 in reverse with the power member 41 when the power member 41 is between the push pin start position C and the push pin end position D, wherein reverse is a reverse direction in which the push pin assembly 2 is retracted when the power member 41 is advanced and the push pin assembly 2 is advanced when the power member 41 is retracted;

Wherein the link mechanism 42 is arranged between the power member 41 and the opening and closing assembly 3, and the reverse toggle structure 43 is arranged between the power member 41 and the push pin assembly 2.

When the anastomat is anastomat, the power piece 41 sequentially moves to the maximum opening position A, the anastomat closing position B, the nail pushing initial position C and the nail pushing final position D, the connecting rod mechanism 42 enables the power piece 41 to drive the opening and closing assembly 3 to move only when the maximum opening position is between the anastomat closing position B, and the reverse stirring structure 43 enables the power piece 41 to drive the nail pushing assembly 2 to move only when the nail pushing initial position C is between the nail pushing final position D.

In some embodiments, referring to fig. 5, 6, 7, 8 in combination, the linkage 42 includes:

a driving arm 421 hinged to the power member 41;

a driven arm 422 hinged to the shutter assembly 3;

A first hinge pin 423 for hinge-connecting the driving arm 421 and the driven arm 422; and

The guide groove 424 comprises a locking section 424a and an arc section 424b, the locking section 424a is used for locking the linkage mechanism 42 to enable the opening and closing assembly 3 to move along with the power piece 41, the locking section 424a is a straight line section, and the arc section 424b is used for unlocking the linkage mechanism 42 and guiding the driven arm 422 to rotate around the static opening and closing assembly 3;

Wherein the first hinge pin 423 is disposed in the guide groove 424 to slide along the guide groove 424.

When the power piece 41 moves between the maximum opening position A and the closing position B of the anastomat during anastomosis, the first hinge pin 423 is correspondingly positioned in the locking section 424a of the guide groove 424, the whole link mechanism 42 is in a locking state (the hinge positions are locked), and the power piece 41 drives the opening and closing assembly 3 to move in the outer tube 12; when the first hinge pin 423 enters the circular arc segment 424b, the opening and closing assembly 3 is no longer moved with the power member 41, and the opening and closing assembly 3 is in a stationary state with respect to the housing assembly 1.

In other embodiments, the link arms of the link mechanism 42 may include not only the driving arm 421 and the driven arm 422, but also other intermediate link arms, and in connection with fig. 15 to 19, for example, the link mechanism 42 includes not only the driving arm 421 hinged to the power member 41, the driven arm 422 hinged to the opening and closing assembly 3, but also an intermediate link arm 425 connected between the driving arm 421 and the driven arm 422, a third hinge pin 426 for hinging the driving arm 421 and the intermediate link arm 425, a fourth hinge pin 427 for hinging the intermediate link arm 425 and the driven arm 422, and a double pin guide groove for guiding the third hinge pin 426 and the fourth hinge pin 427, which is provided on the housing 11, is provided with not only a straight groove 428a for locking the entire link mechanism 42, but also a first sub-circular groove 428B, a second sub-circular groove 428c and a third sub-circular groove 428d for unlocking the link mechanism 42, the linear slot 428a, the first sub-arc slot 428B, and the second sub-arc slot 428c are sequentially connected, the third sub-arc slot 428d is connected with the linear slot 428a, the third sub-arc slot 428d and the first sub-arc slot 428B are in one-to-one correspondence to synchronously unlock the rotational degree of freedom of the position of the fourth hinge pin 427 and the rotational degree of freedom of the position of the third hinge pin 426, the second sub-arc slot 428c is used for guiding the third hinge pin 426 to rotate around the fourth hinge pin 427 when the fourth hinge pin 427 is limited at the end of the third sub-arc slot 428d, so as to increase the linear distance between the hinge ends of the driving arm 41 and the driving member 421 and the third hinge pin 426, and when the driving member 41 moves between the maximum stapler opening position a and the stapler closing position B, the third hinge pin 426 and the fourth hinge pin 427 are both located in the linear slot 428a, when the power member 41 moves between the anastomat closing position B and the staple pushing start position C, the third hinge pin 426 enters the first sub circular arc groove 428B, the fourth hinge pin 427 enters the third sub circular arc groove 428D, after the power member 41 moves to the staple pushing start position C, the fourth hinge pin 427 is positioned at the tail end of the whole third sub circular arc groove 428D, the power member 41 moves to the staple pushing end position D, staple pushing is completed, the third hinge pin 426 rotates around the fourth hinge pin 427 in the whole staple pushing process, and the linear distance between the hinge ends of the driving arm 41 and the power member 421 and the third hinge pin 426 increases.

In some embodiments, referring to fig. 1, 2, 3, and 4, the power member 41 is a push rod, and the push rod is connected to an electric driving mechanism 44. In other embodiments, the push rod may be manually driven (not shown), for example, the push rod may be inserted through the housing 11, and the push rod may be manually pushed or pulled to achieve power input.

In some embodiments, referring to fig. 1 and 14 in combination, the driving mechanism 44 includes a motor 441, a transmission mechanism for converting a rotational motion output by the motor 441 into a linear motion of the push rod, the motor 441 and the transmission mechanism are disposed on the housing 11, the motor 441 is connected with a controller 442 for controlling the motor 441, and the controller is provided with an opening button for opening the stapler, a closing button for closing the stapler, a push button (firing button) for starting the push pin, and a release button for returning the push pin assembly and releasing tissue after the push pin is completed. In the specific implementation process, the motor 441, the transmission mechanism and the push rod may form a push rod motor 441, and the push rod motor 441 may be installed inside the housing 11, or may be installed outside the housing 11 so that the push rod extends into the housing 11.

When anastomosis is performed, the whole anastomosis process can be completed by only pressing each button on the controller 442.

In some embodiments, referring to fig. 2,3, 4, 9 in combination, the reverse toggle structure 43 includes:

A rotating member 431 rotatably disposed on the housing 11, wherein the rotating member 431 is provided with a avoiding portion 431a for avoiding the power member 41 when the power member 41 is located between the maximum opening position a and the closing position B of the stapler, the rotating member 431 is provided with a first force applying portion 431B for contacting the power member 41 and a second force applying portion 431c for contacting the push pin assembly 2, and the received moment directions of the first force applying portion 431B and the second force applying portion 431c on the rotating member 431 are opposite; and

A pin pushing gear part 432a, which is disposed on the power member 41, when the power member 41 is located between the pin pushing start position C and the pin pushing end position D, the pin pushing gear part 432a abuts against the first force applying part 431b, so that the second force applying part 431C abuts against the pin pushing assembly 2.

When the power piece 41 moves between the maximum opening position A of the anastomat and the closing position B of the anastomat during anastomosis, the power piece 41 and the nail pushing gear part 432a are not contacted with each other, and the nail pushing assembly 2 is static relative to the shell assembly 1; when the power member 41 enters the pushing start position C and moves to the pushing end position D, the first pressing portion 431b of the rotating member 431 abuts against the pushing stop portion 432a, and the second pressing portion 431C of the rotating member 431 abuts against the pushing assembly 2, so that the pushing assembly 2 moves forward (the end portion of the outer tube 12 moves) along the outer tube 12 under the action of the reverse torque, and the pushing action is achieved.

In some embodiments, referring to fig. 6, the push pin gear 432a is a second hinge pin 432 for hinging the linkage 42 to the power member 41.

In some embodiments, referring to fig. 9, the rotating member 431 includes:

a central portion 4311;

A first force arm 4312, wherein the first force applying portion 431b is disposed on the first force arm 4312, and wherein the relief portion 431a is disposed on the first force arm 4312; and

The second force arm 4313, and the second force applying portion 431c is disposed on the second force arm 4313.

When the rotary member 431 pushes the push pin assembly 2 during the anastomosis, the first force arm 4312 abuts against the push pin blocking portion 432a on the power member 41, and the second force arm 4313 abuts against the push pin assembly 2.

In some embodiments, referring to fig. 9, the relief portion 431a is a groove formed at an outer end of the first force arm 4312, and the groove matches the contour of the power member 41, so that the first force arm 4312 surrounds the periphery of the power member 41, and two first force applying portions 431b that are symmetrical to each other are formed on the first force arm 4312.

In some embodiments, referring to fig. 3, 4, 7, 8, 9, 12, and 13, the ejector assembly 2 is provided with an ejector input portion 21, and the second force portion 431C abuts against the ejector input portion 21 when the power member 41 is located between the ejector start position C and the ejector end position D. The pushing force input portion 21 can smoothly transmit the pushing force from the power member 41 to the pushing assembly 2.

In some embodiments, referring to fig. 6, the housing 11 is provided with an auxiliary guide structure 111 for guiding the push force input portion 21. Referring to fig. 5 in combination, the auxiliary guide structure 111 may be a first auxiliary guide groove 111a formed at an inner wall of the housing 11, and the auxiliary guide structure 111 allows the more reliable transmission of the pushing force to the pushing assembly 2.

In some embodiments, referring to fig. 2,3 and 6, the push pin force input portion 21 is hinged to the push pin assembly 2, which is beneficial for reducing the risk of jamming of the push pin assembly 2.

In some embodiments, referring to fig. 5 and 6, the driven arm 422 is hinged to the opening and closing assembly 3 by a fifth hinge pin 429, and the housing 11 is provided with a second auxiliary guide groove 111b for guiding the fifth hinge pin 429.

In some embodiments, referring to fig. 2, 3,4, 6, 7, 8 in combination, the stapler further comprises a return spring 5 for resetting the push pin assembly 2, the return spring 5 being arranged between the push pin assembly 2 and the outer tube 12.

After the pushing of the nails is completed, the power piece 41 moves reversely, namely, sequentially from the nail pushing ending position D, the nail pushing starting position C and the anastomat closing position B to the maximum opening position A of the anastomat, when the power piece 41 moves from the nail pushing ending position D to the nail pushing starting position C (when the first hinge shaft slides in the circular arc section 424B in the corresponding diagram), the thrust of the power piece 41 to the nail pushing assembly 2 is reduced, the nail pushing assembly 2 automatically retreats under the action of the reset spring 5, and when the power piece 41 moves to the anastomat closing position B (when the first hinge shaft slides in the locking section 424a in the corresponding diagram), the power piece 41 pushes the opening and closing assembly 3 to move so as to open the anastomat and release tissues.

In some embodiments, referring to fig. 6, 7 and 8, the nail pushing assembly 2 is sleeved outside the opening and closing assembly 3, the outer tube 12 is sleeved outside the nail pushing assembly 2, a first limiting portion 22 for installing a spring is arranged on the nail pushing assembly 2, a second limiting portion 121 is arranged on the outer tube 12, the return spring 5 is a compression spring, one end of the return spring 5 abuts against the first limiting portion 22, and the other end of the return spring 5 abuts against the second limiting portion 121.

In the description of the present invention, unless explicitly stated and limited otherwise, the "upper" or "lower" of a first feature in a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact with each other through another feature therebetween.

In the description of the invention, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.

Claims

1. The utility model provides an anastomat, includes shell subassembly, push away nail subassembly and switching subassembly, shell subassembly include the casing and with the outer tube that the casing link up, push away nail subassembly and switching subassembly all set up in the shell subassembly, the switching subassembly is through following the outer tube is flexible to realize the switching of anastomat, push away nail subassembly through following the outer tube reciprocating motion realizes pushing away nail and suturing nail and breaks away from its characterized in that: the device comprises an anastomat, an anastomat closing position, a nail pushing starting position and a nail pushing ending position, and is characterized by further comprising a power mechanism, wherein the power mechanism is only provided with one power piece for inputting power, the power piece is used for driving the opening and closing assembly and the nail pushing assembly, and in single anastomosis action, the power piece sequentially passes through the maximum opening position of the anastomat, the closing position of the anastomat, the nail pushing starting position and the nail pushing ending position under the action of external force, so that the nail pushing assembly starts the nail pushing action after the opening and closing assembly is closed in place, and the nail pushing starting position coincides with the closing position of the anastomat or is arranged between the closing position of the anastomat and the nail pushing ending position;

the power mechanism includes:

wherein the link mechanism is arranged between the power piece and the opening and closing assembly, and the reverse toggle structure is arranged between the power piece and the nail pushing assembly;

The link mechanism includes:

A driving arm hinged to the power member;

a driven arm hinged to the opening and closing assembly;

A first hinge pin for hinging the driving arm and the driven arm; and

The guide groove comprises a locking section and an arc section, the locking section is used for locking the connecting rod mechanism to enable the opening and closing assembly to move along with the power piece, the power piece is a push rod, the push rod is connected with the electric driving mechanism, the locking section is a straight line section, the arc section is used for unlocking the connecting rod mechanism and guiding the driven arm to rotate around the static opening and closing assembly, and the guide groove is arranged on the shell;

2. The stapler of claim 1, wherein: the electric driving mechanism comprises a motor and a transmission mechanism used for converting rotary motion output by the motor into linear motion of the push rod, wherein the motor and the transmission mechanism are arranged on the shell, and the motor is connected with a controller used for controlling the motor.

3. The stapler of claim 1, wherein the reverse toggle structure comprises:

4. A stapler according to claim 3, wherein: the nail pushing gear part is a second hinge pin for hinging the connecting rod mechanism and the power piece.

5. A stapler according to claim 3, wherein said rotary member comprises:

A central portion;

The second force arm is provided with the second force applying part.

6. The stapler of claim 5, wherein: the avoidance part is a groove formed at the outer end of the first force arm, the groove is matched with the outline of the power piece, so that the first force arm surrounds the periphery of the power piece, and two first force applying parts which are symmetrical to each other are formed on the first force arm.

7. A stapler according to claim 3, wherein: the second force part is propped against the nail pushing force input part when the power piece is positioned between the nail pushing starting position and the nail pushing ending position.

8. The stapler of claim 7, wherein: an auxiliary guide structure for guiding the nail pushing force input part is arranged on the shell.

9. The stapler of claim 7, wherein: the nail pushing force input part is hinged on the nail pushing assembly.

10. The stapler according to any one of claims 1 to 9, wherein: the device further comprises a reset spring for resetting the nail pushing assembly, wherein the reset spring is arranged between the nail pushing assembly and the outer tube.

11. The stapler of claim 10, wherein: the nail pushing assembly is sleeved outside the opening and closing assembly, the outer tube is sleeved outside the nail pushing assembly, a first limiting part for installing a spring is arranged on the nail pushing assembly, a second limiting part is arranged on the outer tube, the return spring is a compression spring, one end of the return spring is propped against the first limiting part, and the other end of the return spring is propped against the second limiting part.