WO2021088204A1

WO2021088204A1 - Anastomat and cutting and suturing assembly and fixing assembly thereof

Info

Publication number: WO2021088204A1
Application number: PCT/CN2019/124961
Authority: WO
Inventors: 沈沛
Original assignee: 江苏云泓百纳精密机械有限公司
Priority date: 2019-11-05
Filing date: 2019-12-13
Publication date: 2021-05-14
Also published as: CN110680436A

Abstract

An anastomat and a cutting and suturing assembly and a fixing assembly thereof. The cutting and suturing assembly comprises an upper matching member (100), which is divided into an upper matching surface (101) and a top surface (102), a nail abutting seat (103) being formed by recessing from the upper matching surface (101) towards the top surface (102), and the nail abutting seat (103) having four rows; a lower matching member (200), one end thereof being hinged to one end of the upper matching member (100), the lower matching member comprising a lower matching surface (201) and a bottom surface (202), nail bins (203) being formed by recessing from the lower matching surface (201) towards the bottom surface (202), and the nail bins (203) having four rows, wherein the upper matching member (100) and the lower matching member (200) are both made of metal materials, and the diameter of the cutting and suturing assembly is 10 mm. According to an all-metal nail forming system, parts are produced by means of a metal powder injection molding technology, and the nail forming effect is better; cutting anastomosis resistance and the tension applied to a cutting knife are reduced by means of structural optimization; the nail abutting seat (103) and a nail abutting seat cover plate are integrally designed and are produced by using the metal powder injection molding technology; and a separated riveting pin structure is optimized into an integrated riveting column (403a) structure.

Description

Anastomat and its slitting component and fixing component

Technical field

The present invention relates to the technical field of medical devices, in particular, to a stapler for laparoscopic surgical instruments that realizes the function of anastomosing and cutting.

Background technique

Traditional disposable endoscope cutting and stapling device: The cutting and stapling device is composed of a nail bin, a nail pusher, a nail push slider, a nail bin splint, a nail seat cover, a nail seat, a cutting knife, and staples.

In terms of materials, the nail bin, the nail pusher, and the nail push slider are plastic parts, and the nail chamber splint, the nail seat cover, the nail seat, the cutting knife, and the staple nail are metal parts.

In terms of technology, the nail silo plywood and the nail seat cover are mostly processed by stamping, the nail seat and cutting knife are machined, and the nail forming groove on the nail seat is processed by pressing.

Structurally, the cover of the nail seat is welded on the nail seat, the nail magazine is clamped into the nail magazine splint, the staples, the nail pusher, and the nail push slider are arranged from top to bottom. The cutting knife is located in the nail chamber and the nail seat. The rear end of the suture of the nail seat, the upper and lower platforms of the cutting knife are respectively in contact with the nail abutment seat and the nail bin splint. There are three rows of nail holes on the left and right sides of the nail bin, which are arranged symmetrically from front to back along the center seam, and nail grooves are correspondingly arranged on the nail seat.

In clinical application, laparoscopic instruments need to use a trocar to establish a channel to enter the abdominal cavity. Different types of trocars can be selected according to the specifications of the equipment. The smaller the instrument, the smaller the puncture and the smaller the wound during the operation, and the more trauma to the patient. small. At present, the specifications of the trocar required for intracavity cutting are 12mm (when using low staples to sew thin tissues) and 15mm (when using high staples to sew thick tissues).

According to the existing technology, there are the following shortcomings:

1. The current design of six rows of staples makes the width of the sutured wound large and the pushing resistance is also large. Although the selection of a large-sized trocar can meet the needs of the instrument to pass, the enlarged wound increases the trauma to the patient. The recovery time is longer, and the greater push resistance also affects the convenience of the operation. The problem is more obvious in the narrow focus. It can further reduce the surgical trauma and improve the convenience of the operation, which is the constant pursuit of doctors in the field of minimally invasive surgery. the goal;

2. In order to achieve a good anastomosis effect, the staples must have high strength, the height of the nails after forming must be consistent and the shape of the standard B-shaped, which has certain requirements for the nail forming system. At present, the nail magazine, the nail pusher, and the nail pusher slider are made of plastic parts, and the nail seat and the staple nail are metal parts. That is, in the hexahedron where the staple nail exists, five sides are made of polymer materials, and only one side is made of polymer materials. Made of metal materials. During the forming process of the stapler, it will produce a reaction force on the push nail and push the nail slider, which will compress the height of the plastic part to a certain extent, and affect the consistency of the nail forming height. At the same time, the nail will sometimes produce lateral direction during the forming process. The force is not formed in the same plane, resulting in abnormal conditions such as dovetail nails and staples (embedded between the nail pusher and the nail bin), which affects the effect of the anastomosis;

3. During the cutting and anastomosis process of the instrument, the cutting knife moves forward along the center seam of the staple cartridge and the staple holder to cut the tissue. The upper and lower platforms of the knife move synchronously along the staple holder and the staple holder splint respectively, and the staple holder and the staple holder splint are moved synchronously in the process. The staple cartridges close together to form a suitable staple forming gap. The forward movement of the knife simultaneously drives the push nail slider forward, and then pushes out the staple nail through the push nail piece to touch the nail seat and form in the formed suitable gap. During the whole process, the main resistance that the user overcomes is the tissue cutting force and the nail forming force, and reducing the resistance to a certain extent has positive significance for clinical use. At the same time, the I-shaped cutting knife is exposed to greater tension during the cutting and anastomosis process, and there is a risk of being pulled off to a certain extent, which will cause the operation to fail. Further reducing this risk is of great significance to the safety of the use of the device;

4. At present, the machining of the nail seat and the pressing process of the nail forming groove are relatively cumbersome. In order to facilitate the pressing, the nail seat is usually processed with a softer material. For this reason, the nail seat cover is added to improve the strength. However, the overall strength of the nail seat part is still not ideal, and a certain degree of deformation will occur when encountering thick tissues. At the same time, the cover plate of the nail seat and the nail seat need to be connected by laser welding, and the subsequent polishing and grinding treatment are required, and the manufacturing process is cumbersome;

5. In order to better adapt to the position of the target tissue, the instrument itself is designed with a head swing mechanism, which can realize the front assembly (including the joint) swinging to a certain angle at the steering joint. The steering joint is divided into two upper and lower steering joints. At present, the most commonly used is The riveting pin penetrates through the steering joint hole and is fixed by one-side riveting. Its riveting firmness has an important guarantee for the realization of the swing head function. The current method requires high firmness control and has certain risks.

Summary of the invention

The purpose of this section is to outline some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part, the description abstract and the title of the invention in this application to avoid obscuring the purpose of this part, the description abstract and the title of the invention, and such simplifications or omissions cannot be used to limit the scope of the present invention.

In view of the above and/or the problems in the prior art, the present invention is proposed.

Therefore, one of the objectives of the present invention is to provide a slit assembly of an anastomat.

In order to solve the above technical problems, the present invention provides the following technical solutions: a stapler slitting assembly, including: an upper matching member, divided into an upper matching surface and a top surface, from the upper matching surface, the top surface is recessed to form an abutment A nail seat, the nail abutment seat is in 4 rows; a lower fitting piece, one end of which is hinged with one end of the upper fitting piece, and includes a lower fitting surface and a bottom surface, and the bottom surface is recessed from the lower fitting surface to form a staple cartridge, The staple cartridges are 4 rows, the staple cartridges of the second row and the third row are symmetrical about the central axis, the staple cartridges of the first row and the fourth row are symmetrical about the central axis, and the staple cartridges of the first row are symmetrical with respect to the central axis. The second row of staple cartridges is asymmetrical; wherein, the upper matching piece and the lower matching piece are made of metal materials; and the diameter of the slitting component is 10mm.

As a preferred solution of the slitting assembly of the stapler of the present invention, the upper fitting part and the lower fitting part are formed by powder metallurgy technology.

As a preferred solution of the slitting assembly of the stapler of the present invention, wherein: an upper slit is provided on the central axis of the upper matching member, a lower slit is provided on the lower matching member, and the upper slit and the The lower gap is on a straight line; it also includes a cutter, the cutter includes an upper baffle, a lower baffle and a blade, the blade passes through the upper gap and the lower gap, and the upper baffle and the The upper gap is restricted, and the lower baffle is restricted from the lower gap.

As a preferred solution of the slitting assembly of the stapler of the present invention, wherein: the lower fitting further includes a nail pusher and a nail pusher, the nail pusher is in a chevron shape and includes a first driving block , A second driving block and a third driving block, the second driving block moves linearly along the lower gap; the lower mating member is recessed from the bottom surface in the direction of the mating surface to form a guide groove, and the guide groove is divided into a first A guide matching groove and a second guide matching groove, the first guide matching groove is provided between the third row of nail magazines and the fourth row of nail magazines, and the second guide matching groove is provided between the first row of nail magazines and the first row of nail magazines. Between the two rows of staple cartridges; wherein, the first drive block is matched with the first guide fitting groove, and the third drive block is matched with the second guide fitting groove; wherein, the guide groove is matched with the staple cartridge Connected.

As a preferred solution of the slitting assembly of the stapler of the present invention, the upper fitting member further includes a nail abutment seat cover plate, and the nail abutment seat cover plate and the top surface are welded by laser.

Another object of the present invention is to provide a fixation assembly of an anastomat.

In order to solve the above technical problems, the present invention provides the following technical solutions: a fixation assembly of a stapler, including a steering connector, including a steering upper connecting piece, a steering lower connecting piece, a fixed connecting piece and an intermediate connecting piece, the steering up The connecting piece is matched with the middle connecting piece, the turning down connecting piece is matched with the fixed connecting piece, the fixed connecting piece is provided with integrated riveting posts on both sides, and the integrated riveting post is connected with the intermediate connecting piece. The intermediate connecting piece is provided with a slitting assembly installation hole, which is hinged to the lower matching piece through a pin; the push-knife connecting piece, the turning connecting piece installs the tool between the upper gap and the lower gap, and the push The knife connector includes a knife connecting piece, and the dovetail groove of the knife is inlaid on the connecting piece.

As a preferred solution of the fixation assembly of the stapler of the present invention, wherein: the steering connector is provided with a groove plate groove inside, and the steering elastic piece is installed through the groove plate groove; the steering connector is provided with a housing A space where a steering pull hook is placed in the accommodating space, one end of the steering pull hook is provided with a limiting hole, and the limiting hole is sleeved on the integrated riveting column; the intermediate connector is provided with an upper connecting piece riveting column, The upper steering connecting piece is connected by the upper connecting piece riveting column; the lower steering connecting piece is riveted with the lower riveting column at the bottom end of the fixed connecting piece.

As a preferred solution of the fixing assembly of the stapler of the present invention, it further comprises a staple cartridge cover plate, which is welded to the bottom surface of the lower fitting piece, and the lower fitting piece is clamped in the steering connecting piece through the staple cartridge cover plate.

Another object of the present invention is to provide a stapler.

The present invention provides the following technical solutions: including the slitting assembly and the fixing assembly, and further including a gun body and a gun body connecting assembly, one end of the gun body connecting assembly is connected with the gun body, and the other end is connected with the gun body The fixed components are connected.

The beneficial effects of the present invention:

(1) The use of 4 rows of staple cartridges to narrow the width of the suture, combined with the optimized design of the size in the height direction, realizes the overall reduction in the size of the front end of the instrument including the component parts, which can pass through the 10mm trocar smoothly, reducing the surgical wound and making it more conducive to The patient’s wound is healed, while the push resistance is reduced, and it is more convenient to insert the tissue to be cut and sutured, especially in many narrow lesions.

(2) The nail magazine, the nail pusher, the pusher slider, and the tool connecting piece are all metal parts, and the nail warehouse, the pusher nail, and the pusher nail slider are produced by metal powder injection molding technology. The parts are high in strength and all metal. The nail forming system (the hexahedron where the staple is located is made of metal materials) more effectively guides the forming of the staple, with the same height and in the same plane;

(3) The thickness of the cutter is increased, thereby increasing the strength and reducing the cutting resistance. The two legs of the anastomosis nail are pre-bent design to reduce the forming resistance. Thus, the resistance of the entire cutting and anastomosis process is reduced, and the use is easier and smoother. At the same time, it effectively reduces the tension of the cutting knife during the cutting and anastomosis process, and increases the safety of use;

(4) The integrated design of the nail seat cover and the nail seat reduces the assembly process between the two. At the same time, the nail seat is produced by metal powder injection molding technology, which avoids the complicated production process of the traditional nail seat, the overall structure is more compact, the strength is better, and the production efficiency is higher;

(5) There is an integrated riveting column on the steering connector, so the riveting firmness is more secure.

Description of the drawings

In order to explain the technical solutions of the embodiments of the present invention more clearly, the following will briefly introduce the drawings used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative labor, other drawings can be obtained from these drawings. among them:

Figure 1 is a schematic diagram of the overall structure of the slitting assembly of the stapler of the present invention;

2 is a partial enlarged schematic view of the position I in FIG. 1 in the slitting assembly of the stapler of the present invention;

Fig. 3 is a partial enlarged schematic view of the position II in Fig. 1 in the slitting assembly of the stapler of the present invention;

Figure 4 is a partial enlarged schematic view of the lower fitting member in the slitting assembly of the stapler of the present invention;

Figure 5 is an exploded schematic diagram of the overall structure of the slitting assembly of the stapler of the present invention;

Fig. 6 is a schematic diagram of the overall structure of the pusher slider in the slitting assembly of the stapler of the present invention;

Figure 7 is an exploded schematic diagram of the overall structure in the fixing assembly of the stapler of the present invention;

Fig. 8 is a schematic structural view of the downward turning connector of the stapler of the present invention from a perspective;

Fig. 9 is a schematic structural view of the upper steering connecting member of the stapler of the present invention from a perspective;

Figure 10 is a partial enlarged schematic view of a part of the structure of the stapler of the present invention;

Figure 11 is a schematic diagram of the structure of the slider and the paddle of the stapler of the present invention;

Figure 12 is a schematic diagram of the overall structure of the stapler of the present invention;

Fig. 13 is an exploded schematic diagram of the overall structure of the gun body connecting assembly in the stapler of the present invention.

Detailed ways

In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings of the specification.

In the following description, many specific details are explained in order to fully understand the present invention, but the present invention can also be implemented in other ways different from those described here, and those skilled in the art can do so without departing from the connotation of the present invention. Similar promotion, therefore, the present invention is not limited by the specific embodiments disclosed below.

Secondly, the "one embodiment" or "embodiment" referred to herein refers to a specific feature, structure, or characteristic that can be included in at least one implementation of the present invention. The appearances of "in one embodiment" in different places in this specification do not all refer to the same embodiment, nor are they separate or selectively mutually exclusive embodiments with other embodiments.

Example 1

1 to 6, the present invention provides a stapler slitting assembly. In the first embodiment of the present invention, the main body of the stapler slitting assembly includes an upper mating member 100 and a lower mating member 200, In addition, the upper fitting piece 100 and the lower fitting piece 200 cooperate with each other.

It should be noted that, in this embodiment, the upper fitting piece 100 and the lower fitting piece 200 are formed by a powder metallurgy process.

Specifically, the upper mating member 100 is divided into an upper mating surface 101 and a top surface 102. The upper mating surface 101 is recessed to the top surface 102 to form a nail abutting seat 103, the nail abutting seat 103 is 4 rows, so The upper slit 104 is provided on the central axis of the mating member 100 described above.

In this embodiment, each row and each column of the anchor seat 103 are parallel.

The lower mating member 200, one end of which is hinged to one end of the upper mating member 100, includes a lower mating surface 201 and a bottom surface 202. The lower mating surface 201 is recessed toward the bottom surface 202 to form a staple cartridge 203, the staple cartridge 203 is 4 rows, the second row of staple cartridges 203b and the third row of staple cartridges 203c are symmetric about the central axis, and the first row of staple cartridges 203a and the fourth row of staple cartridges 203d are symmetrical about the central axis. The lower matching member 200 is provided with a lower gap 204, and the upper gap 104 and the lower gap 204 are in a straight line.

It should be noted that the staple cartridges 203a of the first row and the staple cartridges 203b of the second row are asymmetrical. The staples are placed in the staple cartridge 203.

Preferably, the lower fitting 200 further includes a nail pushing slider 205 and a nail pushing piece 207, the nail pushing piece 207 is installed under the staples.

The nail push slider 205 is shaped like a "mountain" and includes a first drive block 205a, a second drive block 205b, and a third drive block 205c. The second drive block 205b moves linearly along the lower gap 204. The lower mating member 200 is recessed from the bottom surface 202 toward the lower mating surface 201 to form a guide groove 206. The guide groove 206 is divided into a first guide mating groove 206a and a second guide mating groove 206b. The first guide mating groove 206a It is arranged between the third row of staple magazines 203c and the fourth row of staple magazines 203d, and the second guiding and cooperating groove 206b is arranged between the first row of staple magazines 203a and the second row of staple magazines 203b.

Wherein, the first driving block 205a is matched with the first guide fitting groove 206a, and the third driving block 205c is matched with the second guide fitting groove 206b.

It should be noted that the guide groove 206 communicates with the staple cartridge 203.

It also includes a cutter 300. The cutter 300 includes an upper baffle 301, a lower baffle 302, and a blade 303. The blade 303 passes through the upper gap 104 and the lower gap 204, respectively, and the upper baffle 301 is connected to the upper baffle 301. The upper gap 104 is restricted, and the lower baffle 302 and the lower gap 204 are restricted.

In order to fully understand the above "limit position", the following is an example for illustration:

After assembly, the upper baffle 301 is placed on one side of the upper gap 104, and the blade 303 is placed on the other side of the upper gap 104. The "other side" here refers to the upper gap 104 and the lower gap 104. One side between the gaps 204. Similar to this, the lower baffle 302 is placed on one side of the lower gap 204, and the “side” is not between the upper gap 104 and the lower gap 204. As a result, the upper baffle 301 and the lower baffle 302 restrict the angle between the upper mating member 100 and the lower mating member 200.

Wherein, both the nail push slider 205 and the nail push piece 207 are made of metal materials.

Wherein, the diameter of the slitting component is 10 mm.

Example 2

1 to 6, the second embodiment provided by the slitting assembly of the stapler of the present invention, this embodiment is different from the first embodiment: in this embodiment, the upper mating member 100 also includes an abutment The nail seat cover plate is matched with the top surface 102 of the upper matching member 200, and the two are welded by laser to prevent the nail push slider 205 and the nail push piece 207 from falling out.

Example 3

7-9, the present invention also provides a stapler fixing assembly. In the third embodiment of the present invention, the main body of the stapler fixing assembly includes a steering connector 400 and a push-knife connector 500.

The steering connecting piece 400 includes an upper steering connecting piece 401, a lower steering connecting piece 402, a fixed connecting piece 403, and an intermediate connecting piece 405. The upper steering connecting piece 401 is matched with the intermediate connecting piece 405, and the lower steering connecting piece 402 is fixed The connecting piece 403 is matched, the turning upper connecting piece 401 is arranged at the upper part of the middle connecting piece 405, and the turning lower connecting piece 402 is arranged at the lower part of the fixed connecting piece 403. Both sides of the fixed connecting piece 403 are provided with integral riveting posts 403a, which are connected to the intermediate connecting piece 405 through the riveting posts 403a. The front end of the intermediate connecting piece 405 is provided with a slitting component mounting hole, which is hinged by a pin. Lower mating piece 200. Preferably, the steering connector 400 is provided with a groove plate and a steering elastic piece 406 is installed through the groove plate groove. An accommodating space is provided inside the steering connector 400, a steering hook 404 is placed in the accommodating space, one end of the steering hook 404 is provided with a limiting hole 404a, and the limiting hole 404a is sleeved on the riveting column 403a .

Preferably, the middle connecting piece 405 is provided with an upper connecting piece riveting post 405a, and the upper turning connecting piece 405b is connected through the upper connecting piece riveting post 405a. It should be noted that, in this embodiment, the lower steering connecting piece 405c is riveted with the lower riveting post 403b at the bottom end of the fixing connecting member 403.

It should be noted that the upper steering connecting piece 401 is provided with an upper matching groove 401a, and the steering connecting piece 405b is placed in the upper matching groove 401a and connected and fixed with the connecting piece riveting post 405a.

The specific installation steps are: the upper steering connecting piece 401 is matched with the middle connecting piece 405, the lower steering connecting piece 402 is matched with the fixed connecting piece 403, and the riveting post 403a of the fixed connecting piece 403 is inserted into the middle connecting piece 405. The upper steering connecting piece 405b is placed in the upper matching groove 401a, and the upper steering connecting piece 405b is matched with the upper connecting piece riveting post 405a. Similarly, the lower steering connecting piece 405c is placed in the lower matching groove 402b on the lower steering connecting piece 402, and is riveted with the lower riveting post 403b at the bottom end of the fixing connecting piece 403.

The push-knife connector 500, the steering connector 400 installs the tool 300 between the upper gap 104 and the lower gap 204, the push-knife connector 500 includes a tool connection piece 501, and the dovetail groove of the tool 300 is embedded in the述连接片501上。 Said connecting piece 501.

It should be noted that the single thickness of the connecting piece 501 is 0.25 mm. In order to ensure the flexibility of steering and the effectiveness of use, the connecting piece 501 in this embodiment is composed of 4 pieces stacked.

The staple cartridge cover 600 is welded to the bottom surface 202 of the lower mating member 200, and the lower mating member 200 is clamped in the steering connector 600 through the staple cartridge cover 600.

An upper sliding groove 401b is provided on the steering upper connecting piece 401, a lower groove 402c is provided on the steering lower connecting piece 402, the upper half of the tool connecting piece 501 is engaged in the upper sliding groove 401b, and the lower half of the tool connecting piece 501 It is engaged in the lower groove 402c. When the upper steering connecting piece 401 and the lower steering connecting piece 402 are matched, the tool connecting piece 501 is engaged in the upper chute 401b and the lower groove 402c, and the tool connecting piece 501 is along the upper chute 401b The lower groove 402c and the lower groove 402c move in the y-axis direction, and the turning elastic piece 406 is placed in the elastic piece limiting groove 401c on both sides of the tool connecting piece 501, and the tool connecting piece 501 is reset by the turning elastic piece 406. The steering hook 404 is placed in the right gap of the lower steering connector 402 (the right side referred to here refers to the position shown in the figure, relative to the x-axis direction). At the end of the lower turning connector 402 (the end is relative to the positive direction of the y-axis) is provided with a slider groove 402a, and a spring, a slider 402a-1 and a paddle 402a-2 are placed in the slider groove 402a. 402a-1 and paddle 402a-2 cooperate with each other, and paddle 402a-2 is equivalent to insurance. And the paddle 402a-2 is provided with a protrusion 402a-5 that cooperates with the oblique groove 402a-3 on the slider 402a-1. When the slider 402a-1 moves along the y-axis direction in the figure, the paddle is driven 402a-2 does a rotating movement.

It should be noted that the paddle 402a-2 is a ring-shaped original piece, one end of which is provided with a positioning protrusion 402a-4. In the initial state, the positioning protrusion 402a-4 is opposite to the limiting card slot 501a on the tool connecting piece 501. Cooperate. When the slider 402a-1 moves in the negative direction of the y-axis, the paddle 402a-2 is rotated. At this time, the positioning protrusion 402a-4 disengages from the limit slot 501a, and the tool connecting piece 501 can move forward .

Preferably, a sleeve 407 is provided on the outer side of the fixing assembly, and the whole is fixed and integrated through the sleeve 407.

Example 4

1-11, the present invention also provides a stapler, the stapler includes a slitting assembly and a fixing assembly, and also includes a gun body 700 and a gun body connecting assembly 800, one end of the gun body connecting assembly 800 is connected to the The gun body 700 is connected, and the other end is connected to the fixing assembly.

Specifically, the slitting assembly has a diameter of 10 mm, and its main body includes an upper fitting piece 100, a lower fitting piece 200, and a cutter 300, and the upper fitting piece 100 and the lower fitting piece 200 are matched with each other.

The upper mating member 100 is divided into an upper mating surface 101 and a top surface 102. The upper mating surface 101 is recessed to the top surface 102 to form a nail abutting seat 103, the nail abutting seat 103 is 4 rows, and the upper mating An upper slit 104 is provided on the central axis of the piece 100. In this embodiment, each row and each column of the anchor seat 103 are parallel.

The lower mating member 200, one end of which is hinged to one end of the upper mating member 100, includes a lower mating surface 201 and a bottom surface 202. The lower mating surface 201 is recessed toward the bottom surface 202 to form a staple cartridge 203, the staple cartridge 203 is 4 rows, the second row of staple cartridges 203b and the third row of staple cartridges 203c are symmetric about the central axis, and the first row of staple cartridges 203a and the fourth row of staple cartridges 203d are symmetrical about the central axis. The lower matching member 200 is provided with a lower gap 204, and the upper gap 104 and the lower gap 204 are in a straight line. The staple cartridges 203a of the first row are asymmetrical to the staple cartridges 203b of the second row. The staples are placed in the staple cartridge 203.

Preferably, the lower fitting 200 further includes a nail pushing slider 205 and a nail pushing piece 207, the nail pushing piece 207 is installed under the staples. The push nail slider 205 has a "mountain" shape, and includes a first drive block 205a, a second drive block 205b, and a third drive block 205c. The second drive block 205b runs along the upper gap 104 and the lower gap 204. Linear movement. The lower mating member 200 is recessed from the bottom surface 202 toward the lower mating surface 201 to form a guide groove 206. The guide groove 206 is divided into a first guide mating groove 206a and a second guide mating groove 206b. The first guide mating groove 206a It is arranged between the third row of staple magazines 203c and the fourth row of staple magazines 203d, and the second guiding and cooperating groove 206b is arranged between the first row of staple magazines 203a and the second row of staple magazines 203b.

It should be noted that the guide groove 206 communicates with the staple cartridge 203. The nail push slider 205 and the nail push piece 207 are made of metal materials.

The cutter 300 includes an upper baffle 301, a lower baffle 302, and a blade 303. The blade 303 passes through the upper gap 104 and the lower gap 204, respectively. The upper baffle 301 and the upper The gap 104 is restricted, and the lower baffle 302 and the lower gap 204 are restricted.

Preferably, the upper mating member 100 further includes a nail seat cover plate, which is matched with the top surface 102 of the upper mating member 200, and the two are welded by laser to prevent the push nails from slipping. The block 205 and the nail pusher 207 fall out.

The main body of the fixing assembly includes a steering connector 400 and a push knife connector 500.

The steering connecting piece 400 includes an upper steering connecting piece 401, a lower steering connecting piece 402, a fixed connecting piece 403, and an intermediate connecting piece 405. The upper steering connecting piece 401 is matched with the intermediate connecting piece 405, and the lower steering connecting piece 402 is fixed The connecting piece 403 is matched, the turning upper connecting piece 401 is arranged at the upper part of the middle connecting piece 405, and the turning lower connecting piece 402 is arranged at the lower part of the fixed connecting piece 403. Both sides of the fixed connecting piece 403 are provided with integral riveting posts 403a, which are connected to the intermediate connecting piece 405 through the riveting posts 403a. The front end of the intermediate connecting piece 405 is provided with a slitting component mounting hole, which is hinged by a pin. Lower mating piece 200.

Preferably, the steering connector 400 is provided with a groove plate and a steering elastic piece 406 is installed through the groove plate groove. An accommodating space is provided inside the steering connector 400, a steering hook 404 is placed in the accommodating space, one end of the steering hook 404 is provided with a limiting hole 404a, and the limiting hole 404a is sleeved on the riveting column 403a .

A gun body 700 and a gun body connection assembly 800, one end of the gun body connection assembly 800 is connected with the gun body 700, and the other end is connected with a fixing assembly.

The gun body connection assembly 800 includes a gun body sleeve 801, a gun body plastic tube 802, a push block 803, a steering adjustment rod 804, a push rod 805, a spring plate 806, a push piece 807, a safety block 808, a sealing ring 809, and a connecting sleeve Back cover and small casing. The left side of the gun body plastic tube 802 is provided with a safety block 808, the right side of the gun body plastic tube 802 is provided with a steering adjustment rod 804, and a pusher rod 805 is penetrated in the middle. The upper circumferential surface of the plastic tube 802 of the gun body is provided with a mounting groove for the pushing block 803. The front of the pushing block 803 is pressed against the pushing piece 807, and the back is pressed against the small sleeve. A spring plate 806 is installed on the lower circumference of the gun body plastic tube 802. The front end of the spring plate 806 is connected with a safety block 808. The safety block 808 and the steering adjustment rod 804 are respectively inserted into the sealing ring 809. The rear cover of the connecting sleeve is sleeved on the gun body plastic tube 802 The tail.

It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be carried out. Modifications or equivalent replacements without departing from the spirit and scope of the technical solutions of the present invention should be covered by the scope of the claims of the present invention.

Claims

A slitting assembly of a stapler, which is characterized in that it comprises:

The upper mating member (100) is divided into an upper mating surface (101) and a top surface (102). The upper mating surface (101) is recessed toward the top surface (102) to form a nail abutting seat (103). The nail seat (103) has 4 rows;

The lower matching piece (200), one end of which is hingedly connected to one end of the upper matching piece (100), includes a lower matching surface (201) and a bottom surface (202), from the lower matching surface (201) to the bottom surface ( 202) is recessed to form a staple cartridge (203), the staple cartridges (203) are 4 rows, the second row of staple cartridges (203b) and the third row of staple cartridges (203c) are symmetrical about the central axis, and the first row of staple cartridges (203a) ) And the fourth row of staple cartridges (203d) are symmetrical about the central axis, and the first row of staple cartridges (203a) and the second row of staple cartridges (203b) are asymmetrical;

Wherein, the upper matching piece (100) and the lower matching piece (200) are made of metal materials;

Wherein, the diameter of the slitting component is 10 mm.
The slitting assembly of the stapler according to claim 1, characterized in that: the upper fitting piece (100) and the lower fitting piece (200) are formed by powder metallurgy technology.
The slitting assembly of the stapler according to claim 1 or 2, characterized in that: the central axis of the upper matching member (100) is provided with an upper slit (104), and the lower matching member (200) is provided with a lower slit (204), the upper gap (104) and the lower gap (204) are in a straight line;

It also includes a cutter (300). The cutter (300) includes an upper baffle (301), a lower baffle (302), and a blade (303). The blade (303) passes through the upper gap (104) and The lower gap (204) is restricted by the upper baffle (301) and the upper gap (104), and the lower baffle (302) is restricted by the lower gap (204).
The slitting assembly of the stapler according to claim 3, characterized in that: the lower mating member (200) further comprises a nail pusher slider (205) and a nail pusher piece (207), and the nail pusher slider (205) is in the shape of The chevron shape includes a first driving block (205a), a second driving block (205b) and a third driving block (205c), the second driving block (205b) moves linearly along the lower gap (204);

The lower mating member (200) is recessed from the bottom surface (202) toward the lower mating surface (201) to form a guide groove (206), and the guide groove (206) is divided into a first guide mating groove (206a) and a second guide Matching grooves (206b), the first guiding matching grooves (206a) are provided between the third row of staple cartridges (203c) and the fourth row of staple cartridges (203d), and the second guiding matching slots (206b) are provided Between the first row of staple warehouses (203a) and the second row of staple warehouses (203b);

Wherein, the first driving block (205a) is matched with the first guide fitting groove (206a), and the third driving block (205c) is matched with the second guide fitting groove (206b);

Wherein, the guide groove (206) is communicated with the staple cartridge (203).
The slitting assembly of the stapler according to claim 4, characterized in that the upper matching member (100) further comprises a nail seat cover plate, and the nail seat cover plate and the top surface (102) are welded by laser.
A fixed component of an anastomat, which is characterized in that it comprises:

Steering connecting piece (400), including steering upper connecting piece (401), steering down connecting piece (402), fixed connecting piece (403) and intermediate connecting piece (405), said steering upper connecting piece (401) is connected to the middle (405), the downward steering connection (402) and the fixed connection (403) are matched, the fixed connection (403) is provided with integrated riveting posts (403a) on both sides, the The integrated riveting column (403a) is connected to the intermediate connecting piece (405), and the intermediate connecting piece (405) is provided with a slitting assembly installation hole, which is hinged to the lower matching piece (200) through a pin shaft;

The push-knife connector (500), the steering connector (400) installs the tool (300) between the upper gap (104) and the lower gap (204), and the push-knife connector (500) includes a tool connection piece (501), the dovetail groove of the cutter (300) is inlaid on the connecting piece (501).
The stapler fixing assembly according to claim 6, characterized in that: the steering connector (400) is provided with a groove plate inside, and the steering elastic piece (406) is installed through the groove plate groove;

The steering connector (400) is provided with an accommodating space inside, and a steering pull hook (404) is placed in the accommodating space. One end of the steering pull hook (404) is provided with a limiting hole (404a), and the limiting hole ( 404a) sleeved on the integrated riveting post (403a);

The middle connecting piece (405) is provided with an upper connecting piece riveting post (405a), and the upper steering connecting piece (405b) is connected through the upper connecting piece riveting post (405a);

The lower steering connecting piece (405c) is riveted with the lower riveting post (403b) at the bottom end of the fixing connecting piece (403).
The stapler fixing assembly according to claim 7, characterized in that it further comprises a staple cartridge cover plate (600), which is welded to the bottom surface (202) of the lower mating member (200), and the staple cartridge cover plate (600) is used for welding The lower matching piece (200) is clamped in the steering connection piece (400).
A stapler, comprising the slitting assembly according to claim 5 and the fixing assembly according to claim 8, characterized in that it further comprises a gun body (700) and a gun body connecting assembly (800), said One end of the gun body connection assembly (800) is connected with the gun body (700), and the other end is connected with the fixing assembly.