A stapler cartridge assembly for a linear stapler

Abstract

The present invention discloses a stapler cartridge assembly of a linear stapler. The stapler cartridge assembly comprises three rows of upper staple cavities and three rows of lower staple cavities which are staggered in the upper and lower halves of the stapler cartridge, so that the maximum forces exerted on staple pushers inserted in the staple cavities during the staple forming process are staggered with each other. The first staple pushers are simultaneously inserted in the first and second rows of staple cavities, and the second staple pushers are inserted in the third row of staple cavities. The first inclined surface used for pushing the first staple pushers has a smaller slope than the second inclined surface used for pushing the second staple pushers. Thus, it can be ensured that the forward thrust of the staple pusher block is smaller when the same upward thrust is generated. In addition, the highest points of the first inclined surface and the second inclined surface on the staple pusher block are staggered with each other, so that the time when the first staple pusher and the second staple pusher reach the highest point can be staggered, so that the three rows of suture staples are prevented from reaching the highest point at the same time, thereby further reducing the thrust required by the staple pusher block, making the entire suturing process smoother, relieving the doctor's surgical fatigue, and optimizing the suturing effect.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and more particularly to a stapler assembly of a linear stapler. Background Art

[0002] Staplers are medical devices that replace manual suturing. They are mainly used to close stumps or incisions in laparoscopic digestive tract reconstruction and organ resection. They are suitable for a variety of open or minimally invasive general surgery, obstetrics and gynecology, urology, thoracic surgery and pediatric surgeries. They can be used together with staples or tissue support materials.

[0003] Due to the development of modern science and technology and the improvement of manufacturing technology, the staplers currently used in clinical practice are reliable in quality, easy to use, tight, and of appropriate tightness. In particular, they have the advantages of fast suturing, simple operation, and few side effects and surgical complications. They have also made it possible to remove tumors that were previously inoperable, and are very popular and highly praised by clinical surgeons at home and abroad. The main working principle of the stapler is to use titanium nails to separate or staple tissues, similar to a stapler.

[0004] After the traditional stapler presses the suture staples, the firing rod drives the cutting knife forward, and at the same time, the cutting knife pushes the nail pushing block forward, driving the nail pushing particles to move perpendicular to the direction of the nail pushing block. Finally, the nail pushing particles drive the suture staples to bend and form under the compulsion of the nail support groove. However, if the firing force is too large, the doctor's arm and hand grip force will be too large, causing the doctor to fatigue during the operation. What is more serious is that when the instrument penetrates deep into the tissue, due to the excessive firing force, when cutting the suture tissue, it will cause the hand to shake and then cause the cutting component to vibrate, which is likely to injure other normal tissues. At the same time, due to the shaking of the cutting component, the continuity of the suture forming will be poor, and the nail formation will also be poor.

[0005] Therefore, how to solve the problem of excessive firing force of existing staplers is an urgent problem to be solved by those skilled in the art. Summary of the invention

[0006] In view of this, an object of the present invention is to provide a cartridge stapler assembly for a linear stapler, which can effectively reduce the firing force of the stapler, relieve the doctor's surgical fatigue, and optimize the anastomosis effect.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] A stapler assembly of a linear stapler, comprising a stapler, a stapler cavity being provided on the stapler, a stapler pusher for placing a suture staple being provided in the stapler cavity which can slide up and down, the stapler being divided into an upper half and a lower half by a knife groove, the stapler cavity comprising three rows of upper stapler cavities staggeredly distributed in the upper half and three rows of lower stapler cavities staggeredly distributed in the lower half, the upper stapler cavities and the lower stapler cavities being symmetrically arranged relative to the knife groove, and the distances of the upper stapler cavities and the lower stapler cavities relative to the knife groove from near to far are respectively the first row of stapler cavities, the second row of stapler cavities and the third row of stapler cavities;

[0009] The nail pushing particles include a first nail pushing particle inserted into the first row of nail cavities and the second row of nail cavities at the same time, and a second nail pushing particle inserted into the third row of nail cavities. A slide groove connected to the nail cavity is provided at the bottom of the nail magazine along the length direction of the knife groove. A nail pushing block for lifting the nail pushing particles is slidably provided in the slide groove. The nail pushing block includes a first inclined surface for lifting the first nail pushing particle and a second inclined surface for lifting the second nail pushing particle. The angle between the first inclined surface and the length direction of the slide groove is smaller than the angle between the second inclined surface and the length direction of the slide groove. The maximum heights of the first inclined surface and the second inclined surface are the same and are staggered along the length direction of the slide groove.

[0010] Preferably, the nail pushing block is further provided with a third slope for lifting the nail pushing particle on the front side of the first slope and the second slope, and the angle between the third slope and the length direction of the slide groove is greater than the angle between the second slope and the length direction of the slide groove.

[0011] Preferably, the third inclined surface is smoothly connected to the first inclined surface and the second inclined surface in the form of an arc.

[0012] Preferably, the nail pushing block includes a first push plate for lifting the first nail pushing particle and a second push plate for lifting the second nail pushing particle, the first inclined surface is arranged on the first push plate, and the second inclined surface is arranged on the second push plate.

[0013] Preferably, the slide groove includes a first slide groove slidably matched with the first push plate and a second slide groove slidably matched with the second push plate.

[0014] Preferably, a fourth inclined surface matching the first inclined surface is provided at the bottom of the first nail-pushing particle, and the fourth inclined surface is parallel to the first inclined surface.

[0015] Preferably, a fifth inclined surface matching the second inclined surface is provided at the bottom of the second nail-pushing particle, and the fifth inclined surface is parallel to the second inclined surface.

[0016] Preferably, the upper surface of the nail magazine is provided with an outwardly protruding step located at the first row of nail cavities.

[0017] Preferably, the first row of nail cavities are aligned side by side with the third row of nail cavities, and the second row of nail cavities are distributed between adjacent first row of nail cavities.

[0018] The stapler cartridge assembly of the linear stapler provided by the present invention is characterized in that three rows of upper stapler cavities and three rows of lower stapler cavities are staggeredly distributed in the upper and lower halves of the stapler cartridge, so that the maximum forces exerted on the staple pushers inserted in the stapler cavities during the staple forming process are staggered with each other, the first staple pushers are simultaneously inserted in the first and second rows of stapler cavities, the second staple pushers are inserted in the third row of stapler cavities, and the first inclined surface used to push the first staple pushers has a smaller slope than the second inclined surface used to push the second staple pushers, so that it can be ensured that the forward thrust of the staple pusher block is smaller when the same upward thrust is generated, and in addition, the highest points of the first inclined surface and the second inclined surface on the staple pusher block are staggered with each other, so that the time when the first staple pusher and the second staple pusher reach the highest point can be staggered, so as to avoid the three rows of suture staples reaching the highest point at the same time, thereby further reducing the thrust required by the staple pusher block, reducing the firing force of the stapler, making the entire suturing process smoother, relieving the doctor's surgical fatigue, and optimizing the suturing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0020] Figure 1 A schematic diagram of a specific embodiment of a stapler cartridge assembly of a linear stapler provided by the present invention;

[0021] Figure 2 An exploded schematic diagram of a specific embodiment of a stapler cartridge assembly of a linear stapler provided by the present invention;

[0022] Figure 3 A top view schematic diagram of a nail bin;

[0023] Figure 4 for Figure 3 Schematic diagram of the cross section of AA;

[0024] Figure 5 It is a structural schematic diagram of a push pin block;

[0025] Figure 6 is a side view schematic diagram of a nail pushing block;

[0026] Figure 7 Schematic diagram of the structure of the first push nail particle;

[0027] Figure 8 Schematic diagram of the structure of the second nail-pushing particle.

[0028] Among them, 1-nail magazine, 11-knife groove, 12-upper half, 13-lower half, 14-step, 2-suture nail, 3-nail push particle, 31-first nail push particle, 311-fourth inclined plane, 32-second nail push particle, 321-fifth inclined plane, 4-nail cavity, 41-first row of nail cavity, 42-second row of nail cavity, 43-third row of nail cavity, 5-nail push block, 51-first inclined plane, 52-second inclined plane, 53-third inclined plane, 54-first push plate, 55-second push plate, 6-slide groove, 61-second slide groove, 62-first slide groove. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] The core of the present invention is to provide a cartridge nail assembly for a linear stapler, which can effectively reduce the firing force of the stapler, relieve the doctor's surgical fatigue, and optimize the anastomosis effect.

[0031] Please refer to Figures 1 to 8 , Figure 1 A schematic diagram of a specific embodiment of a stapler cartridge assembly of a linear stapler provided by the present invention; Figure 2 An exploded schematic diagram of a specific embodiment of a stapler cartridge assembly of a linear stapler provided by the present invention; Figure 3 A top view schematic diagram of a nail bin; Figure 4 for Figure 3 Schematic diagram of the cross section of AA; Figure 5 It is a structural schematic diagram of a push pin block; Figure 6 is a side view schematic diagram of a nail pushing block; Figure 7 Schematic diagram of the structure of the first push nail particle; Figure 8 Schematic diagram of the structure of the second nail-pushing particle.

[0032] The stapler assembly of the linear stapler provided by the present invention comprises a stapler 1, a stapler cavity 4 is provided on the stapler 1, a stapler pusher 3 for placing a suture staple 2 is provided in the stapler cavity 4 and can slide up and down, the stapler 1 is divided into an upper half 12 and a lower half 13 by a knife groove 11, the stapler cavity 4 comprises three rows of upper stapler cavities staggeredly distributed in the upper half 12 and three rows of lower stapler cavities staggeredly distributed in the lower half 13, the upper stapler cavity and the lower stapler cavity are symmetrically arranged relative to the knife groove 11, and the distances of the upper stapler cavity and the lower stapler cavity relative to the knife groove 11 from near to far are respectively the first row of stapler cavities 41, the second row of stapler cavities 42 and the third row of stapler cavities 43;

[0033] The nail pushing particles 3 include a first nail pushing particle 31 inserted into the first row of nail cavities 41 and the second row of nail cavities 42 at the same time, and a second nail pushing particle 32 inserted into the third row of nail cavities 43. A slide groove 6 connected to the nail cavity 4 is provided at the bottom of the nail magazine 1 along the length direction of the knife groove 11. A nail pushing block 5 for lifting the nail pushing particles 3 is slidably provided in the slide groove 6. The nail pushing block 5 includes a first inclined surface 51 for lifting the first nail pushing particle 31, and a second inclined surface 52 for lifting the second nail pushing particle 32. The angle between the first inclined surface 51 and the length direction of the slide groove 6 is smaller than the angle between the second inclined surface 52 and the length direction of the slide groove 6. The maximum heights of the first inclined surface 51 and the second inclined surface 52 are the same and are staggered along the length direction of the slide groove 6.

[0034] Among them, the nail magazine 1 is a long strip structure, and the upper end surface of the nail magazine 1 is used to be close to the surface of the tissue to be sutured. The nail magazine 1 is provided with a nail cavity 4 that passes through it from top to bottom. The nail cavity 4 is provided with a nail pushing particle 3 that can move up and down along the nail cavity 4. The nail pushing particle 3 is used to place the suture nail 2. Specifically, the upper end surface of the nail pushing particle 3 is provided with a groove for placing the suture nail 2. The middle part of the nail magazine 1 is provided with a knife groove 11 along its length direction. The nail magazine 1 is divided into an upper half 12 and a lower half 13 by the knife groove 11.

[0035] like Figure 3 As shown, the nail chamber 4 includes three rows of upper nail chambers staggered in the upper half 12 and three rows of lower nail chambers staggered in the lower half 13, that is, the upper half 12 of the nail magazine 1 is provided with three rows of upper nail chambers, and the lower half 13 of the nail magazine 1 is provided with three rows of lower nail chambers, and the upper nail chambers and the lower nail chambers are symmetrically distributed relative to the knife groove 11. For the convenience of explanation, the distances of the three rows of upper nail chambers and the three rows of lower nail chambers relative to the knife groove 11 are respectively referred to as the first row of nail chambers 41, the second row of nail chambers 42 and the third row of nail chambers 43 from near to far.

[0036] like Figure 4 As shown, the nail-pushing particles 3 include a first nail-pushing particle 31 and a second nail-pushing particle 32. The first nail-pushing particle 31 can be slid up and down and inserted into the first row of nail cavities 41 and the second row of nail cavities 42 at the same time, and the second nail-pushing particle 32 can be slid up and down and inserted into the third row of nail cavities 43, so that under the push of the nail-pushing block 5, the nail-pushing particles 3 move upward to insert the suture staples 2 on the nail-pushing particles 3 into the tissue to be sutured. And because the first row of nail cavities 41, the second row of nail cavities 42 and the third row of nail cavities 43 are staggered, it is possible to avoid the nail-pushing particles 3 on the first row of nail cavities 41, the second row of nail cavities 42 and the third row of nail cavities 43 from being sutured at the same time, thereby reducing the firing force of the stapler.

[0037] like Figure 5As shown, the nail pushing block 5 includes a first inclined surface 51 and a second inclined surface 52. The first inclined surface 51 is used to lift the first nail pushing particle 31, and the second inclined surface 52 is used to lift the second nail pushing particle 32. That is, the nail pushing block 5 is driven by the cutting knife and slides along the slide groove 6 at the bottom of the nail magazine 1. During the sliding process of the nail pushing block 5, when the first inclined surface 51 on the nail pushing block 5 slides to contact the first nail pushing particle 31, the first nail pushing particle 31 slides relative to the first inclined surface 51, so that the first inclined surface 51 lifts the first nail pushing particle 31, so that the first nail pushing particle 31 moves upward along the first row of nail cavities 41 and the second row of nail cavities 42 to press the suture nail 2 into the tissue to be sutured. Similarly, the second inclined surface 52 can lift the second nail pushing particle 32 upward.

[0038] like Figure 6 As shown, since the first nail-pushing particle 31 needs to push two rows of suture nails 2 at the same time, the force required for the first nail-pushing particle 31 to move forward is greater than that of the second nail-pushing particle 32. Therefore, the angle between the first inclined surface 51 and the length direction of the chute 6 is smaller than the angle between the second inclined surface 52 and the length direction of the chute 6, so that the forward thrust of the nail-pushing block 5 is smaller when the same upward thrust is generated. Moreover, the maximum heights of the first inclined surface 51 and the second inclined surface 52 are the same and are staggered along the length direction of the chute 6, so that the time points of the maximum forces required for the first nail-pushing particle 31 and the second nail-pushing particle 32 in the process of nailing are staggered, so as to reduce the firing force of the nail-pushing block 5 to push the nail-pushing particle 3.

[0039] In summary, the stapler assembly of the linear stapler provided by the present invention is characterized in that the three rows of upper staple cavities and the three rows of lower staple cavities are staggeredly distributed in the upper half 12 and the lower half 13 of the stapler 1, so that the maximum forces exerted on the staple pushers 3 inserted in the staple cavities 4 during the staple forming process are staggered with each other, the first staple pushers 31 are simultaneously inserted in the first row of staple cavities 41 and the second row of staple cavities 42, the second staple pushers 32 are inserted in the third row of staple cavities 43, and the first inclined surface 51 for pushing the first staple pushers 31 is opposite to the first inclined surface 52 for pushing the second staple pushers 31. The second inclined surface 52 of the particle 32 has a smaller slope, so that it can be ensured that when the same upward thrust is generated, the forward thrust of the nail pushing block 5 is smaller. In addition, the highest points of the first inclined surface 51 and the second inclined surface 52 on the nail pushing block 5 are staggered with each other, so that the time when the first nail pushing particle 31 and the second nail pushing particle 32 reach the highest point can be staggered, avoiding that the three rows of suture staples 2 reach the highest point at the same time, thereby further reducing the thrust required for the nail pushing block 5, reducing the firing force of the stapler, and making the entire suturing process more stable.

[0040] like Figure 6As shown, on the basis of the above embodiment, as a preferred embodiment, the nail pushing block 5 is further provided with a third inclined surface 53 for lifting the nail pushing particle 3 on the front side of the first inclined surface 51 and the second inclined surface 52, and the angle between the third inclined surface 53 and the length direction of the chute 6 is greater than the angle between the second inclined surface 52 and the length direction of the chute 6. That is, in this embodiment, the third inclined surface 53 with a larger slope is provided on the front side of the nail pushing block 5, so that the entrance slope of the nail pushing block 5 is greater than the slope of the back, thereby increasing the moving speed of the upper and lower idle strokes of the suture nail 2 and improving the suture efficiency, and the first inclined surface 51 and the second inclined surface 52 have a smaller slope relative to the third inclined surface 53, which can reduce the thrust required by the nail pushing block 5 when pressing the suture nail 2.

[0041] On the basis of the above embodiments, in order to ensure the smooth sliding of the nail push particle 3 along the nail cavity 4, as a preferred embodiment, the third inclined surface 53 is smoothly connected to the first inclined surface 51 and the second inclined surface 52 respectively. Specifically, the third inclined surface 53 and the first inclined surface 51 and the second inclined surface 52 can adopt an arc transition method.

[0042] like Figure 5 As shown, based on the above embodiment, considering the specific setting mode of the nail pushing block 5, as a preferred embodiment, the nail pushing block 5 includes a first push plate 54 for lifting the first nail pushing particle 31 and a second push plate 55 for lifting the second nail pushing particle 32, the first inclined surface 51 is arranged on the first push plate 54, and the second inclined surface 52 is arranged on the second push plate 55. Correspondingly, as a preferred embodiment, the slide groove 6 includes a first slide groove 62 that is slidably matched with the first push plate 54 and a second slide groove 61 that is slidably matched with the second push plate 55. So that when the nail pushing block 5 is driven by the cutting knife, the first push plate 54 slides along the first slide groove 62, and the second push plate 55 slides along the second slide groove 61. Obviously, the first slide groove 62 should be connected with the first row of nail cavities 41 and the second row of nail cavities 42 at the same time, and the second slide groove 61 should be connected with the third row of nail cavities 43.

[0043] like Figure 7 and Figure 8 As shown, on the basis of the above embodiments, in order to further improve the stability of the movement of the nail pushing particle 3 in the nail cavity 4, as a preferred embodiment, the bottom of the first nail pushing particle 31 is provided with a fourth inclined surface 311 that cooperates with the first inclined surface 51, and the fourth inclined surface 311 is parallel to the first inclined surface 51, and the bottom of the second nail pushing particle 32 is provided with a fifth inclined surface 321 that cooperates with the second inclined surface 52, and the fifth inclined surface 321 is parallel to the second inclined surface 52.

[0044] like Figure 4As shown, on the basis of any of the above embodiments, considering that the first nail pushing particle 31 is inserted into the first row of nail cavities 41 and the second row of nail cavities 42 at the same time, when the nail pushing block 5 pushes the first nail pushing particle 31, it will simultaneously push up the suture nails 2 on the first row of nail cavities 41 and the suture nails 2 on the second row of nail cavities 42. In order to further reduce the thrust required by the nail pushing block 5, as a preferred embodiment, the upper surface of the nail magazine 1 is provided with an outwardly protruding step 14 at the first row of nail cavities 41.

[0045] That is, in this embodiment, an upwardly protruding step 14 is provided on the upper surface of the staple cartridge 1, and the step 14 is located on the side close to the knife groove 11, that is, the first row of staple cavities 41 is located at the step 14, and the deformation time points of the first and second rows of suture staples 2 can be changed by the height difference, and when the upper surface of the staple cartridge 1 is attached to the surface of the tissue to be sutured, only the protruding step 14 on the upper surface of the staple cartridge 1 can be pressed against the surface of the tissue to be sutured, thereby avoiding the upper surface of the staple cartridge 1 being pressed against the surface of the tissue to be sutured as a whole, which is beneficial to ensuring the suture effect.

[0046] like Figure 3 As shown, based on the above embodiment, considering the specific arrangement of the first row of nail cavities 41, the second row of nail cavities 42, and the third row of nail cavities 43, preferably, as a preferred embodiment, the first row of nail cavities 41 and the third row of nail cavities 43 are aligned side by side, and the second row of nail cavities 42 are distributed between adjacent first row of nail cavities 41. That is, in this embodiment, the first row of nail cavities 41 and the third row of nail cavities 43 are parallel, and the positions of the first row and the second row of suture staples 2 are staggered. Specifically, the position of the second row of nail cavities 42 can be staggered by half the position of the nail cavity 4 relative to the first row of nail cavities 41, so as to reduce the thrust required by the nail pushing block 5.

[0047] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0048] The stapler assembly of the linear stapler provided by the present invention is introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A stapler cartridge assembly for a linear stapler, comprising a stapler cartridge (1), wherein the stapler cartridge (1) is provided with a staple cavity (4), wherein a staple pusher (3) for placing a suture staple (2) is provided in the staple cavity (4) and can slide up and down, wherein the stapler cartridge (1) is divided into an upper half (12) and a lower half (13) by a knife groove (11), wherein: The nail cavities (4) include three rows of upper nail cavities staggeredly distributed on the upper half (12) and three rows of lower nail cavities staggeredly distributed on the lower half (13), the upper nail cavities and the lower nail cavities are symmetrically arranged relative to the knife groove (11), and the distances of the upper nail cavities and the lower nail cavities relative to the knife groove (11) from near to far are respectively the first row of nail cavities (41), the second row of nail cavities (42) and the third row of nail cavities (43); The nail pushing particle (3) comprises a first nail pushing particle (31) inserted into the first row of nail cavities (41) and the second row of nail cavities (42) at the same time, and a second nail pushing particle (32) inserted into the third row of nail cavities (43). A slide groove (6) communicating with the nail cavity (4) is provided at the bottom of the nail magazine (1) along the length direction of the knife groove (11). A nail pushing block (5) for lifting the nail pushing particle (3) is slidably provided in the slide groove (6). The nail pushing block (5) comprises a first inclined surface (51) for lifting the first nail pushing particle (31) and a second inclined surface (52) for lifting the second nail pushing particle (32). The angle between the first inclined surface (51) and the length direction of the slide groove (6) is smaller than the angle between the second inclined surface (52) and the length direction of the slide groove (6). The maximum heights of the first inclined surface (51) and the second inclined surface (52) are the same and are staggered along the length direction of the slide groove (6).

2. The stapler cartridge assembly of the linear stapler according to claim 1, characterized in that: The nail pushing block (5) is also provided with a third inclined surface (53) for lifting the nail pushing particle (3) on the front side of the first inclined surface (51) and the second inclined surface (52); the angle between the third inclined surface (53) and the length direction of the slide groove (6) is greater than the angle between the second inclined surface (52) and the length direction of the slide groove (6).

3. The stapler cartridge assembly of the linear stapler according to claim 2, characterized in that: The third inclined surface (53) is smoothly connected to the first inclined surface (51) and the second inclined surface (52) in the form of circular arcs.

4. The stapler cartridge assembly of the linear stapler according to claim 3, characterized in that: The nail pushing block (5) comprises a first pushing plate (54) for lifting the first nail pushing particle (31) and a second pushing plate (55) for lifting the second nail pushing particle (32); the first inclined surface (51) is arranged on the first pushing plate (54), and the second inclined surface (52) is arranged on the second pushing plate (55).

5. The stapler cartridge assembly of the linear stapler according to claim 4, characterized in that: The sliding groove (6) comprises a first sliding groove (62) that is slidably matched with the first push plate (54) and a second sliding groove (61) that is slidably matched with the second push plate (55).

6. The stapler cartridge assembly of the linear stapler according to claim 1, characterized in that: The bottom of the first nail-pushing particle (31) is provided with a fourth inclined surface (311) matched with the first inclined surface (51), and the fourth inclined surface (311) is parallel to the first inclined surface (51).

7. The stapler cartridge assembly of the linear stapler according to claim 6, characterized in that: The bottom of the second nail-pushing particle (32) is provided with a fifth inclined surface (321) matched with the second inclined surface (52), and the fifth inclined surface (321) is parallel to the second inclined surface (52).

8. The stapler cartridge assembly of the linear stapler according to any one of claims 1 to 7, characterized in that: The upper surface of the nail magazine (1) is provided with an outwardly protruding step (14) at the location of the first row of nail cavities (41).

9. The stapler cartridge assembly of the linear stapler according to claim 8, characterized in that: The first row of nail cavities (41) and the third row of nail cavities (43) are aligned side by side, and the second row of nail cavities (42) are distributed between adjacent first row of nail cavities (41).

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