Stapler and its cutting assembly and fixing assembly

Abstract

The present invention discloses a stapler and its slitting assembly and fixing assembly, including an upper mating piece, which is divided into an upper mating surface and a top surface, and the upper mating surface is recessed toward the top surface to form a nail anvil, and the nail anvil is arranged in 4 rows; a lower mating piece, one end of which is hinged to one end of the upper mating piece, and includes a lower mating surface and a bottom surface, and the lower mating surface is recessed toward the bottom surface to form a nail magazine, and the nail magazine is arranged in 4 rows; wherein the upper mating piece and the lower mating piece are both made of metal; wherein the diameter of the slitting assembly is 10 mm. The all-metal nail forming system, the parts are produced by metal powder injection molding technology, and the nail forming effect is better; the cutting and anastomosis resistance and the tension of the cutting knife are reduced by structural optimization; the nail anvil and the nail anvil cover are designed as one piece and produced by metal powder injection molding technology; the separate riveted pin structure is optimized to an integrated riveted column structure.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, and in particular to a stapler for a laparoscopic surgical instrument that realizes the functions of stapling and cutting. Background Art

[0002] Traditional disposable laparoscopic cutting and stapler: The cutting and stapler device is composed of a staple magazine, a staple pushing piece, a staple pushing slider, a staple magazine splint, a staple anvil cover plate, a staple anvil, a cutting knife, and staples.

[0003] In terms of materials, the nail magazine, nail pusher plate, and nail pusher slider are plastic parts, while the nail magazine splint, nail anvil cover plate, nail anvil, cutting knife, and staples are metal parts.

[0004] In terms of technology, the nail magazine splint and the nail anvil cover plate are mostly processed by stamping, the nail anvil and the cutting knife are machined, and the nail forming groove on the nail anvil is processed by pressing.

[0005] In terms of structure, the cover plate of the nail holder is welded on the nail holder, the nail magazine is inserted into the nail holder splint, the staples, nail pusher plates, and nail pusher sliders are arranged in sequence from top to bottom, the cutting knife is located at the rear end of the middle seam line of the nail holder and the nail holder, and the upper and lower platforms of the cutting knife are in contact with the nail holder and the nail holder splint respectively. There are three rows of nail holes on the left and right sides of the nail holder, which are symmetrically arranged in a triangular shape from front to back along the middle seam, and nail grooves are arranged correspondingly on the nail holder.

[0006] In clinical applications, laparoscopic instruments need to use a trocar to establish a channel when entering the abdominal cavity. Different types of trocars can be selected according to the specifications of the instruments. The smaller the instrument, the smaller the trocar, the smaller the incision during surgery, and the less trauma to the patient. The current trocar specifications required for intracavitary cutting are 12mm (when using low-staple sutures for thin tissues) and 15mm (when using high-staple sutures for thick tissues).

[0007] According to the technology of the prior art, there are the following disadvantages:

[0008] 1. The current design of six rows of staples makes the suture wound wider and the pushing resistance is also greater. Although the use of a large-sized puncture device can meet the needs of instrument passage, the larger wound increases the trauma to the patient and prolongs the postoperative recovery time. At the same time, the larger pushing resistance also affects the convenience of operation. The problem is more significant in narrow lesions. Further reducing surgical trauma and improving the convenience of operation are the constant goals pursued by doctors in the field of minimally invasive surgery;

[0009] 2. In order to achieve a good anastomosis effect, the staples must have high strength, and the height of the staples after forming must be consistent and the shape must be a standard B-shape, which places certain requirements on the nail forming system. At present, the staple magazine, staple pusher plate, and staple pusher slider are plastic parts, and the staple holder and staples are metal parts, that is, in the hexahedron where the staples exist, five faces are made of polymer materials, and only one face is made of metal materials. During the forming process, the staples will generate a reaction force on the staple pusher plate and the staple pusher slider, which will compress the height of the plastic parts to a certain extent, affecting the consistency of the staple forming height. At the same time, the staples will sometimes generate lateral forces during the forming process, that is, they are not formed in the same plane, resulting in abnormal conditions such as dovetail staples and staples (embedded between the staple pusher plate and the staple magazine), which affect the anastomosis effect;

[0010] 3. During the process of instrument cutting and anastomosis, the cutting knife moves forward along the middle seam of the nail magazine and the nail anvil to cut the tissue, and the upper and lower platforms of the knife move synchronously along the nail anvil and the nail magazine splint respectively. During the process, the nail anvil and the nail magazine are brought closer to form a suitable nail forming gap. The forward movement of the knife also drives the nail pushing slider forward, and then the staples are pushed out by the nail pushing piece to touch the nail anvil and form in the appropriate gap that has been formed. During the whole process, the main resistance that the user has to overcome is the tissue cutting force and the nail forming force. Reducing the resistance to a certain extent has positive significance for clinical use. At the same time, the I-shaped cutting knife is subjected 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 instrument use;

[0011] 4. At present, the machining of the anvil and the pressing process of the nail forming groove are relatively complicated. In order to facilitate pressing, the anvil is usually processed with softer materials. For this reason, the anvil cover is added to improve the strength, but the overall strength of the anvil is still not ideal, and it will deform to a certain extent when encountering thick tissue. At the same time, the anvil cover and the anvil need to be connected by laser welding, and polishing and grinding are required later, and the manufacturing process is cumbersome;

[0012] 5. In order to better adapt to the position of the target tissue, the device itself is designed with a head swinging mechanism, which can realize the front component (including the joint) swinging to the left and right at a certain angle at the steering joint. The steering joint is divided into two parts, the upper and lower parts. Currently, the rivet pin is passed through the steering joint hole and then fixed on one side by riveting. The riveting firmness plays an important role in ensuring the realization of the head swinging function. The current method has high requirements for firmness control and there are certain risks. Summary of the invention

[0013] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0014] In view of the above problems and / or the problems existing in the prior art, the present invention is proposed.

[0015] Therefore, one of the objects of the present invention is to provide a slitting assembly for a stapler.

[0016] In order to solve the above technical problems, the present invention provides the following technical solutions: a slitting assembly of a stapler, comprising: an upper mating piece, divided into an upper mating surface and a top surface, the upper mating surface is recessed toward the top surface to form a nail annexes, and the nail annexes are arranged in 4 rows; a lower mating piece, one end of which is hinged to one end of the upper mating piece, comprising a lower mating surface and a bottom surface, the lower mating surface is recessed toward the bottom surface to form a nail magazine, the nail magazines are arranged in 4 rows, the second row of nail magazines and the third row of nail magazines are symmetrical about the central axis, the first row of nail magazines and the fourth row of nail magazines are symmetrical about the central axis, and the first row of nail magazines and the second row of nail magazines are asymmetrical; wherein the upper mating piece and the lower mating piece are both made of metal; wherein the diameter of the slitting assembly is 10 mm.

[0017] 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 a powder metallurgy process.

[0018] As a preferred solution of the slitting assembly of the stapler described in the present invention, wherein: an upper slit is provided on the central axis of the upper mating piece, a lower slit is provided on the lower mating piece, and the upper slit and the lower slit are in a straight line; it also includes a tool, the tool includes an upper baffle plate, a lower baffle plate and a blade, the blade passes through the upper slit and the lower slit respectively, the upper baffle plate is limited by the upper slit, and the lower baffle plate is limited by the lower slit.

[0019] As a preferred solution of the slitting assembly of the stapler described in the present invention, wherein: the lower mating piece also includes a nail pushing slider and a nail pushing sheet, the nail pushing slider is in a mountain shape, and includes a first driving block, a second driving block and a third driving block, and the second driving block moves linearly along the lower gap; the lower mating piece is recessed from the bottom surface to the downward mating surface to form a guide groove, and the guide groove is divided into a first guide matching groove and a second guide matching groove, the first guide matching groove is arranged between the third row of nail magazines and the fourth row of nail magazines, and the second guide matching groove is arranged between the first row of nail magazines and the second row of nail magazines; wherein, the first driving block cooperates with the first guide matching groove, and the third driving block cooperates with the second guide matching groove; wherein, the guide groove is connected to the nail magazine.

[0020] As a preferred solution of the slitting assembly of the stapler of the present invention, the upper mating component further includes an anvil seat cover plate, and the anvil seat cover plate and the top surface are welded by laser.

[0021] Another object of the present invention is to provide a fixing assembly of a stapler.

[0022] In order to solve the above technical problems, the present invention provides the following technical solutions: a fixing assembly of a stapler, comprising a steering connector, including a steering upper connector, a steering lower connector, a fixed connector and an intermediate connector, the steering upper connector cooperates with the intermediate connector, the steering lower connector cooperates with the fixed connector, and the fixed connector is provided with integrated riveted columns on both sides, the integrated riveted columns are connected to the intermediate connector, the intermediate connector is provided with a slitting assembly mounting hole, and is hinged to the lower matching member through a pin shaft; a push knife connector, the steering connector installs the tool between the upper gap and the lower gap, the push knife connector includes a tool connecting plate, and the dovetail groove of the tool is embedded in the connecting plate.

[0023] As a preferred solution of the fixing component of the anastomosis device described in the present invention, wherein: the steering connecting member is provided with a groove plate groove inside, and the steering spring plate is installed through the groove plate groove; the steering connecting member is provided with an accommodating space inside, and a steering hook is placed in the accommodating space, and a limiting hole is provided at one end of the steering hook, and the limiting hole is sleeved on the integrated riveted column; the intermediate connecting member is provided with an upper connecting plate riveted column, and the upper steering connecting plate is connected through the upper connecting plate riveted column; the lower steering connecting plate is riveted to the lower riveted column at the bottom end of the fixed connecting member.

[0024] As a preferred solution of the fixing assembly of the stapler of the present invention, it also includes a staple magazine cover plate welded to the bottom surface of the lower fitting member, and the lower fitting member is clamped in the steering connector through the staple magazine cover plate.

[0025] Another object of the present invention is to provide a stapler.

[0026] The present invention provides the following technical solution: comprising the slitting assembly and the fixing assembly, and also comprising a gun body and a gun body connecting assembly, wherein one end of the gun body connecting assembly is connected to the gun body, and the other end is connected to the fixing assembly.

[0027] Beneficial effects of the present invention:

[0028] (1) The use of 4-row stapler cartridges narrows the suture width. Combined with the optimized design of the height dimension, the overall size of the front end of the instrument including the components is reduced, which allows the 10mm trocar to pass smoothly, reduces the surgical incision, and is more conducive to the healing of the patient's wound. At the same time, the push resistance is reduced, making it easier to insert into the tissue to be cut and sutured, especially in many narrow lesions.

[0029] (2) The staple cartridge, staple pusher, staple pusher slider, and cutter connecting plate are all metal parts, and the staple cartridge, staple pusher, and staple pusher slider are produced using metal powder injection molding technology, with high part strength. The all-metal staple forming system (the hexahedron where the staples are located is made entirely of metal materials) more effectively guides the staples to be formed, with the height being consistent and in the same plane;

[0030] (3) The thickness of the cutter is increased, which improves the strength and reduces the cutting resistance. The two legs of the stapler are pre-bent to reduce the forming resistance. This reduces the resistance of the entire cutting and anastomosis process, making it easier and smoother to use. At the same time, it also effectively reduces the tension on the cutting knife during the cutting and anastomosis process, increasing the safety of use;

[0031] (4) The anvil cover and the anvil are designed as one piece, which reduces the assembly process between the two. At the same time, the anvil is produced using metal powder injection molding technology, which avoids the complicated production process of traditional anvils. The overall structure is more compact, the strength is better, and the production efficiency is higher;

[0032] (5) The steering connector is equipped with an integrated riveted column to ensure the firmness of the riveting. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0034] Figure 1 It is a schematic diagram of the overall structure of the slitting assembly of the stapler of the present invention;

[0035] Figure 2 The slitting assembly of the stapler of the present invention Figure 1 A schematic diagram of the local enlarged structure of the I position in the middle;

[0036] Figure 3 The slitting assembly of the stapler of the present invention Figure 1 A schematic diagram of the local enlarged structure of position II in the middle;

[0037] Figure 4It is a partial enlarged structural schematic diagram of the lower matching piece in the slitting assembly of the stapler of the present invention;

[0038] Figure 5 It is an exploded schematic diagram of the overall structure of the slitting assembly of the stapler of the present invention;

[0039] Figure 6 It is a schematic diagram of the overall structure of the staple-pushing slider in the slitting assembly of the stapler of the present invention;

[0040] Figure 7 It is an exploded schematic diagram of the overall structure of the fixing assembly of the stapler of the present invention;

[0041] Figure 8 A schematic structural diagram of the downwardly turned connecting member of the stapler of the present invention from one perspective;

[0042] Fig. 9 A schematic structural diagram of the upper turning connection member of the stapler of the present invention from one perspective;

[0043] Fig.10 It is a partial enlarged schematic diagram of a part of the structure of the stapler of the present invention;

[0044] Fig.11 It is a schematic structural diagram of the slider and the paddle of the stapler of the present invention;

[0045] Fig.12 It is a schematic diagram of the overall structure of the stapler of the present invention;

[0046] Fig.13 It is a schematic exploded view of the overall structure of the gun body connecting assembly in the stapler of the present invention. DETAILED DESCRIPTION

[0047] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0048] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0049] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0050] Example 1

[0051] Reference Figures 1 to 6 The present invention provides a slitting assembly of a stapler. In a first embodiment of the present invention, a main body of the slitting assembly of the stapler includes an upper mating piece 100 and a lower mating piece 200, and the upper mating piece 100 and the lower mating piece 200 cooperate with each other.

[0052] It should be noted that, in this embodiment, the upper matching piece 100 and the lower matching piece 200 are formed by a powder metallurgy process.

[0053] Specifically, the upper mating piece 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 an anvil seat 103 . The anvil seats 103 are arranged in 4 rows. An upper gap 104 is provided on the central axis of the upper mating piece 100 .

[0054] In this embodiment, each column of each row of the dowel pins 103 is parallel.

[0055] The lower mating piece 200, one end of which is hinged to one end of the upper mating piece 100, comprises a lower mating surface 201 and a bottom surface 202, and the lower mating surface 201 is recessed toward the bottom surface 202 to form a nail magazine 203, and the nail magazine 203 is arranged in 4 rows, the second row of nail magazines 203b and the third row of nail magazines 203c are symmetrical about the central axis, and the first row of nail magazines 203a and the fourth row of nail magazines 203d are symmetrical about the central axis. The lower mating piece 200 is provided with a lower slit 204, and the upper slit 104 and the lower slit 204 are in a straight line.

[0056] It should be noted that the first row of staple cartridges 203 a and the second row of staple cartridges 203 b are asymmetrical. Staples are placed in the staple cartridges 203 .

[0057] Preferably, the lower matching member 200 further includes a nail pushing slider 205 and a nail pushing sheet 207, and the nail pushing sheet 207 is installed below the staples.

[0058] The nail-pushing slider 205 is in a "mountain" shape, and includes a first driving block 205a, a second driving block 205b and a third driving block 205c, and 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 matching groove 206a and a second guide matching groove 206b. The first guide matching groove 206a is provided between the third row of nail magazines 203c and the fourth row of nail magazines 203d, and the second guide matching groove 206b is provided between the first row of nail magazines 203a and the second row of nail magazines 203b.

[0059] The first driving block 205a cooperates with the first guiding matching groove 206a, and the third driving block 205c cooperates with the second guiding matching groove 206b.

[0060] It should be noted that the guide groove 206 is communicated with the nail magazine 203 .

[0061] It also includes a tool 300, which includes an upper baffle plate 301, a lower baffle plate 302 and a blade 303. The blade 303 passes through the upper gap 104 and the lower gap 204 respectively. The upper baffle plate 301 is limited by the upper gap 104, and the lower baffle plate 302 is limited by the lower gap 204.

[0062] In order to fully understand the above "limit", the following examples are given:

[0063] 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, where the "other side" refers to the side between the upper gap 104 and the lower gap 204. Similarly, 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. Thus, the upper baffle 301 and the lower baffle 302 limit the angle between the upper mating piece 100 and the lower mating piece 200.

[0064] Wherein, the nail pushing slider 205 and the nail pushing sheet 207 are both made of metal.

[0065] Wherein, the diameter of the cutting assembly is 10 mm.

[0066] Example 2

[0067] Reference Figures 1 to 6 The second embodiment of the slitting assembly of the stapler of the present invention is provided. This embodiment is different from the first embodiment in that in this embodiment, the upper mating part 100 also includes a nail anvil seat cover plate, and the nail anvil seat cover plate cooperates with the top surface 102 of the upper mating part 200, and the two are laser welded to prevent the nail pushing slider 205 and the nail pushing sheet 207 from falling out.

[0068] Example 3

[0069] Reference Figures 7 to 9 The present invention further provides a stapler fixing assembly. In a third embodiment of the present invention, the main body of the stapler fixing assembly includes a steering connector 400 and a push blade connector 500 .

[0070] The steering connector 400 includes a steering upper connector 401, a steering lower connector 402, a fixed connector 403 and an intermediate connector 405. The steering upper connector 401 cooperates with the intermediate connector 405, and the steering lower connector 402 cooperates with the fixed connector 403. The steering upper connector 401 is arranged at the upper part of the intermediate connector 405, and the steering lower connector 402 is arranged at the lower part of the fixed connector 403. The fixed connector 403 is provided with integrated riveted columns 403a on both sides, and is connected to the intermediate connector 405 through the riveted columns 403a. The front end of the intermediate connector 405 is provided with a slit assembly mounting hole, and the lower matching component 200 is hingedly connected through a pin shaft. Preferably, a groove plate groove is provided inside the steering connector 400, and a steering spring 406 is installed through the groove plate groove. The steering connector 400 has an accommodating space inside, in which a steering hook 404 is placed. One end of the steering hook 404 has a limiting hole 404a, and the limiting hole 404a is sleeved on the riveting column 403a.

[0071] Preferably, the intermediate connector 405 is provided with an upper connector riveting column 405a, through which the upper steering connector 405b is connected. It should be noted that in this embodiment, the lower steering connector 405c is riveted to the lower riveting column 403b at the bottom end of the fixed connector 403.

[0072] It should be noted that the steering upper 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 is connected and fixed to the connecting piece riveting column 405a.

[0073] The specific installation steps are as follows: the upper steering connector 401 is matched with the middle connector 405, the lower steering connector 402 is matched with the fixed connector 403, and the riveted column 403a of the fixed connector 403 is inserted into the middle connector 405. The upper steering connector 405b is placed in the upper matching groove 401a, and the upper steering connector 405b is matched with the upper connector riveted column 405a. Similarly, the lower steering connector 405c is placed in the lower matching groove 402b on the lower steering connector 402, and is riveted with the lower riveted column 403b at the bottom end of the fixed connector 403.

[0074] 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 connecting piece 501 , and the dovetail groove of the tool 300 is embedded in the connecting piece 501 .

[0075] It should be noted that the thickness of a single 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 four stacked pieces.

[0076] The nail magazine cover plate 600 is welded to the bottom surface 202 of the lower matching component 200 , and the lower matching component 200 is clamped in the steering connector 600 through the nail magazine cover plate 600 .

[0077] The upper connecting member 401 is provided with an upper slide groove 401b, and the lower connecting member 402 is provided with a lower slide groove 402c. The upper half of the tool connecting piece 501 is engaged in the upper slide groove 401b, and the lower half of the tool connecting piece 501 is engaged in the lower slide groove 402c. When the upper connecting member 401 and the lower connecting member 402 are matched, the tool connecting piece 501 is engaged in the upper slide groove 401b and the lower slide groove 402c, and the tool connecting piece 501 moves along the upper slide groove 401b and the lower slide groove 402c in the y-axis direction, and the steering spring piece 406 is placed in the spring piece limiting groove 401c on both sides of the tool connecting piece 501, and the tool connecting piece 501 is reset by the steering spring piece 406. The steering hook 404 is placed in the right side gap of the lower connecting member 402 (the right side here refers to the position shown in the figure, relative to the x-axis direction). A slider groove 402a is provided at the end of the lower turning connection member 402 (the end is relative to the positive direction of the y-axis), and a spring, a slider 402a-1 and a paddle 402a-2 are placed in the slider groove 402a. The slider 402a-1 and the paddle 402a-2 cooperate with each other, and the paddle 402a-2 is equivalent to a safety. A protrusion 402a-5 is provided on the paddle 402a-2 to cooperate 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, it drives the paddle 402a-2 to rotate.

[0078] It should be noted that the paddle 402a-2 is an annular original piece, and a positioning protrusion 402a-4 is provided at one end thereof. In the initial state, the positioning protrusion 402a-4 cooperates with the limiting slot 501a on the tool connecting piece 501. When the slider 402a-1 moves along the negative direction of the y-axis, the paddle 402a-2 rotates, and the positioning protrusion 402a-4 is disengaged from the limiting slot 501a, and the tool connecting piece 501 can move forward.

[0079] Preferably, a sleeve 407 is provided on the outside of the fixing assembly, and the entire assembly is fixed and integrated by the sleeve 407 .

[0080] Example 4

[0081] Reference Figures 1 to 11, the present invention also provides a stapler, which includes a cutting and sewing assembly and a fixing assembly, and further 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 gun body 700, and the other end is connected to the fixing assembly.

[0082] Specifically, the diameter of the cutting and sewing assembly is 10 mm. Its main body includes an upper fitting 100, a lower fitting 200, and a cutter 300, and the upper fitting 100 and the lower fitting 200 cooperate with each other.

[0083] It should be noted that in this embodiment, the upper fitting 100 and the lower fitting 200 are formed by powder metallurgy process.

[0084] The upper fitting 100 is divided into an upper mating surface 101 and a top surface 102. A staple anvil 103 is formed by recessing from the upper mating surface 101 towards the top surface 102. The staple anvil 103 has 4 rows, and an upper slit 104 is provided on the central axis of the upper fitting 100. In this embodiment, each column in each row of the staple anvil 103 is parallel.

[0085] The lower fitting 200 has one end hinged to one end of the upper fitting 100, and includes a lower mating surface 201 and a bottom surface 202. A staple cartridge 203 is formed by recessing from the lower mating surface 201 towards the bottom surface 202. The staple cartridge 203 has 4 rows. The second row of staple cartridge 203b and the third row of staple cartridge 203c are axisymmetric about the center. The first row of staple cartridge 203a and the fourth row of staple cartridge 203d are axisymmetric about the center. A lower slit 204 is provided on the lower fitting 200, and the upper slit 104 and the lower slit 204 are on the same straight line. The first row of staple cartridge 203a and the second row of staple cartridge 203b are not symmetric. Staples are placed in the staple cartridge 203.

[0086] Preferably, the lower fitting 200 further includes a staple pushing slider 205 and a staple pushing piece 207. The staple pushing piece 207 is installed below the staple. The staple pushing slider 205 is in a "mountain" shape and 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 upper slit 104 and the lower slit 204. The lower fitting 200 is recessed from the bottom surface 202 towards the lower mating surface 201 to form a guiding groove 206. The guiding groove 206 is divided into a first guiding and mating groove 206a and a second guiding and mating groove 206b. The first guiding and mating groove 206a is provided between the third row of staple cartridge 203c and the fourth row of staple cartridge 203d, and the second guiding and mating groove 206b is provided between the first row of staple cartridge 203a and the second row of staple cartridge 203b.

[0087] The first driving block 205a cooperates with the first guiding matching groove 206a, and the third driving block 205c cooperates with the second guiding matching groove 206b.

[0088] It should be noted that the guide groove 206 is connected to the nail magazine 203. The nail pushing slider 205 and the nail pushing sheet 207 are both made of metal.

[0089] The tool 300 includes an upper baffle plate 301 , a lower baffle plate 302 and a blade 303 . The blade 303 passes through the upper slit 104 and the lower slit 204 respectively. The upper baffle plate 301 is limited by the upper slit 104 , and the lower baffle plate 302 is limited by the lower slit 204 .

[0090] Preferably, the upper mating component 100 further includes a dowel seat cover plate, which cooperates with the top surface 102 of the upper mating component 200, and the two are laser welded to prevent the dowel push slider 205 and the dowel push sheet 207 from falling out.

[0091] The main body of the fixing assembly includes a steering connector 400 and a push blade connector 500 .

[0092] The steering connector 400 includes an upper steering connector 401, a lower steering connector 402, a fixed connector 403 and an intermediate connector 405. The upper steering connector 401 cooperates with the intermediate connector 405, and the lower steering connector 402 cooperates with the fixed connector 403. The upper steering connector 401 is arranged at the upper part of the intermediate connector 405, and the lower steering connector 402 is arranged at the lower part of the fixed connector 403. The fixed connector 403 is provided with integrated riveted columns 403a on both sides, and is connected to the intermediate connector 405 through the riveted columns 403a. The front end of the intermediate connector 405 is provided with a slit assembly mounting hole, and is hinged to the lower matching component 200 through a pin shaft.

[0093] Preferably, the steering connector 400 is provided with a groove plate groove inside, through which the steering spring 406 is installed. The steering connector 400 is provided with an accommodation space inside, in which a steering hook 404 is placed, and one end of the steering hook 404 is provided with a limiting hole 404a, and the limiting hole 404a is sleeved on the riveted column 403a.

[0094] Preferably, the intermediate connector 405 is provided with an upper connector riveting column 405a, through which the upper steering connector 405b is connected. It should be noted that in this embodiment, the lower steering connector 405c is riveted to the lower riveting column 403b at the bottom end of the fixed connector 403.

[0095] It should be noted that the steering upper 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 is connected and fixed to the connecting piece riveting column 405a.

[0096] The specific installation steps are as follows: the upper steering connector 401 is matched with the middle connector 405, the lower steering connector 402 is matched with the fixed connector 403, and the riveted column 403a of the fixed connector 403 is inserted into the middle connector 405. The upper steering connector 405b is placed in the upper matching groove 401a, and the upper steering connector 405b is matched with the upper connector riveted column 405a. Similarly, the lower steering connector 405c is placed in the lower matching groove 402b on the lower steering connector 402, and is riveted with the lower riveted column 403b at the bottom end of the fixed connector 403.

[0097] 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 connecting piece 501 , and the dovetail groove of the tool 300 is embedded in the connecting piece 501 .

[0098] The nail magazine cover plate 600 is welded to the bottom surface 202 of the lower matching component 200 , and the lower matching component 200 is clamped in the steering connector 600 through the nail magazine cover plate 600 .

[0099] The upper connecting member 401 is provided with an upper slide groove 401b, and the lower connecting member 402 is provided with a lower slide groove 402c. The upper half of the tool connecting piece 501 is engaged in the upper slide groove 401b, and the lower half of the tool connecting piece 501 is engaged in the lower slide groove 402c. When the upper connecting member 401 and the lower connecting member 402 are matched, the tool connecting piece 501 is engaged in the upper slide groove 401b and the lower slide groove 402c, and the tool connecting piece 501 moves along the upper slide groove 401b and the lower slide groove 402c in the y-axis direction, and the steering spring piece 406 is placed in the spring piece limiting groove 401c on both sides of the tool connecting piece 501, and the tool connecting piece 501 is reset by the steering spring piece 406. The steering hook 404 is placed in the right side gap of the lower connecting member 402 (the right side here refers to the position shown in the figure, relative to the x-axis direction). A slider groove 402a is provided at the end of the lower turning connection member 402 (the end is relative to the positive direction of the y-axis), and a spring, a slider 402a-1 and a paddle 402a-2 are placed in the slider groove 402a. The slider 402a-1 and the paddle 402a-2 cooperate with each other, and the paddle 402a-2 is equivalent to a safety. A protrusion 402a-5 is provided on the paddle 402a-2 to cooperate 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, it drives the paddle 402a-2 to rotate.

[0100] It should be noted that the paddle 402a-2 is an annular original piece, and a positioning protrusion 402a-4 is provided at one end thereof. In the initial state, the positioning protrusion 402a-4 cooperates with the limiting slot 501a on the tool connecting piece 501. When the slider 402a-1 moves along the negative direction of the y-axis, the paddle 402a-2 rotates, and the positioning protrusion 402a-4 is disengaged from the limiting slot 501a, and the tool connecting piece 501 can move forward.

[0101] Preferably, a sleeve 407 is provided on the outside of the fixing assembly, and the entire assembly is fixed and integrated by the sleeve 407 .

[0102] A gun body 700 and a gun body connecting assembly 800, wherein one end of the gun body connecting assembly 800 is connected to the gun body 700, and the other end is connected to the fixing assembly.

[0103] The gun body connecting assembly 800 includes a gun body sleeve 801, a gun body plastic tube 802, a push block 803, a steering adjustment rod 804, a knife push rod 805, a spring plate 806, a push sheet 807, a safety block 808, a sealing ring 809, a connecting sleeve rear cover and a small sleeve. 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 the knife push rod 805 is inserted in the middle. The upper circumferential surface of the gun body plastic tube 802 is provided with a mounting groove for the push block 803, the front of the push block 803 is supported by the push sheet 807, and the back is supported by the small sleeve. The lower circumferential surface of the gun body plastic tube 802 is installed with a spring plate 806, the front end of the spring plate 806 is connected to the safety block 808, the safety block 808 and the steering adjustment rod 804 are respectively inserted into the sealing ring 809, and the connecting sleeve rear cover is sleeved on the tail of the gun body plastic tube 802.

[0104] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A slitting assembly of a stapler, characterized in that: include: The upper mating piece (100) is divided into an upper mating surface (101) and a top surface (102), and the upper mating surface (101) is recessed toward the top surface (102) to form an anvil seat (103), and the anvil seats (103) are arranged in four rows; A lower mating piece (200), one end of which is hinged to one end of the upper mating piece (100), comprising a lower mating surface (201) and a bottom surface (202), the lower mating surface (201) being recessed toward the bottom surface (202) to form a nail magazine (203), the nail magazine (203) being arranged in four rows, the second row of nail magazines (203b) and the third row of nail magazines (203c) being symmetrical about the central axis, the first row of nail magazines (203a) and the fourth row of nail magazines (203d) being symmetrical about the central axis, and the first row of nail magazines (203a) and the second row of nail magazines (203b) being asymmetrical; Wherein, the upper matching piece (100) and the lower matching piece (200) are both made of metal; Wherein, the diameter of the slitting assembly is 10 mm; An upper gap (104) is provided on the central axis of the upper matching piece (100), and a lower gap (204) is provided on the lower matching piece (200), and the upper gap (104) and the lower gap (204) are on a straight line; The tool (300) further comprises an upper baffle plate (301), a lower baffle plate (302) and a blade (303), the blade (303) respectively passing through the upper slit (104) and the lower slit (204), the upper baffle plate (301) being limited in position with the upper slit (104), and the lower baffle plate (302) being limited in position with the lower slit (204); The lower matching piece (200) further comprises a nail-pushing slider (205) and a nail-pushing sheet (207); the nail-pushing slider (205) is in a mountain shape and comprises 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 piece (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 mating groove (206b), wherein the first guide mating groove (206a) is arranged between the third row of nail magazines (203c) and the fourth row of nail magazines (203d), and the second guide mating groove (206b) is arranged between the first row of nail magazines (203a) and the second row of nail magazines (203b); Wherein, the first driving block (205a) cooperates with the first guide matching groove (206a), and the third driving block (205c) cooperates with the second guide matching groove (206b); Wherein, the guide groove (206) is communicated with the nail magazine (203).

2. The slitting assembly of the stapler according to claim 1, characterized in that: The upper matching piece (100) and the lower matching piece (200) are formed by using a powder metallurgy process.

3. The slitting assembly of the stapler according to claim 1, characterized in that: The upper mating part (100) also includes a dowel seat cover plate, and the dowel seat cover plate and the top surface (102) are welded by laser.

4. A stapler fixing assembly, used in conjunction with the stapler cutting assembly according to claim 1, characterized in that: include: The steering connecting member (400) comprises an upper steering connecting member (401), a lower steering connecting member (402), a fixed connecting member (403) and an intermediate connecting member (405), wherein the upper steering connecting member (401) cooperates with the intermediate connecting member (405), the lower steering connecting member (402) cooperates with the fixed connecting member (403), both sides of the fixed connecting member (403) are provided with integrated riveted columns (403a), the integrated riveted columns (403a) are connected with the intermediate connecting member (405), and the intermediate connecting member (405) is provided with a slitting assembly mounting hole and is hinged to the lower matching member (200) through a pin shaft; A push-knife connecting member (500), wherein the steering connecting member (400) installs the tool (300) between the upper gap (104) and the lower gap (204), and the push-knife connecting member (500) comprises a tool connecting plate (501), and the dovetail groove of the tool (300) is embedded in the tool connecting plate (501).

5. The stapler fixing assembly according to claim 4, characterized in that: A groove plate groove is provided inside the steering connector (400), and a steering spring sheet (406) is installed through the groove plate groove; The steering connector (400) is provided with an accommodation space inside, a steering hook (404) is placed in the accommodation space, a limiting hole (404a) is provided at one end of the steering hook (404), and the limiting hole (404a) is sleeved on the integrated riveting column (403a); The intermediate connecting member (405) is provided with an upper connecting piece riveting column (405a), and the upper steering connecting piece (405b) is connected via the upper connecting piece riveting column (405a); The lower steering connecting piece (405c) is riveted to the lower riveting column (403b) at the bottom end of the fixed connecting member (403).

6. The fixing assembly of the stapler according to claim 5, characterized in that: It also includes a nail magazine cover plate (600) which is welded to the bottom surface (202) of the lower matching component (200), and the lower matching component (200) is clamped in the steering connection component (400) through the nail magazine cover plate (600).

7. A stapler comprising the slitting assembly according to claim 3 and the fixing assembly according to claim 6, characterized in that: It also includes a gun body (700) and a gun body connecting assembly (800), wherein one end of the gun body connecting assembly (800) is connected to the gun body (700) and the other end is connected to the fixing assembly.

Images