Staple cartridge structure and stapler with same

Abstract

The utility model discloses a kind of staple cartridge structure and anastomat with staple cartridge structure, the staple cartridge structure includes cartridge body, the cartridge body includes upper surface, two end portions, the outer side wall of connecting two end portions, anastomosis face, slot and multiple nail cavities;Anastomosis face is located upper surface and is divided into left and right two anastomosis areas;Slot is located between two anastomosis areas, and extend longitudinally from upper surface downward and extend horizontally between two end portions;Each nail cavity has opening face, and each staple cartridge is equipped with anastomosis nail;Multiple staple cartridge slots extend downward from any one anastomosis area, and each staple cartridge slot extends horizontally from slot to outer side wall. The anastomat includes the above-mentioned staple cartridge structure and the nail seat, and the staple cartridge structure and the nail seat are connected with each other. The utility model is by being set up staple cartridge slot on the anastomosis face of cartridge body, realizes the liquid inside to be excluded to anastomat outside, improves the reliability of staple cartridge structure anastomosis, and can reduce the risk of tissue being crushed.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and in particular to a staple cartridge structure and an anastomosis structure with a staple cartridge structure. Background Technology

[0002] The end-effector of the linear cutting stapler is a stapler structure, which includes a staple cartridge seat and a staple abutment that are hinged to each other. The staple cartridge seat is used to receive the staple cartridge structure. The staple cartridge structure includes a staple cartridge body and staples disposed in the staple cartridge body. The staple cartridge body is provided with a plurality of staple cavities for storing staples. The staple cartridge body includes a top surface, and the top surface is provided with a staple outlet formed by the staple cavity penetrating the top surface.

[0003] After the staple cartridge structure and the anvil engage to hold the tissue and fire the staples, the staples are blocked by the anvil above after passing through the tissue, bend inward, and form a staggered arrangement in a "B" shape, thereby merging the two layers of tissue together.

[0004] In traditional staple cartridge structures, both the anastomosis surface and the surface of the anastomosis seat are flat. When using anastomosis structures to compress thick tissues, the presence of tissue fluid in the body tissue can affect the staples' ability to penetrate the tissue and form a good and stable anastomosis structure. How to remove tissue fluid is the technical problem that this invention aims to solve. Moreover, the traditional flat staple cartridge structure has insufficient surface friction, which often leads to tissue slippage during the anastomosis process. Summary of the Invention

[0005] To address the aforementioned technical problems, this utility model provides a staple cartridge structure and an anastomosis device with a staple cartridge structure. By creating a staple cartridge groove on the anastomosis surface of the cartridge body, it enables the internal fluid to be discharged to the outside of the anastomosis device, thereby improving the reliability of the staple cartridge structure anastomosis and reducing the risk of tissue compression injury.

[0006] This utility model is achieved through the following technical solution: a staple cartridge structure, comprising a cartridge body, the cartridge body comprising:

[0007] upper surface;

[0008] Two ends;

[0009] The outer sidewalls connecting the two ends;

[0010] The anastomotic surface, located on the upper surface, is divided into two anastomotic zones, left and right.

[0011] The slot, located between the two anastomotic zones, extends longitudinally downward from the upper surface and horizontally between the two ends;

[0012] Multiple staple chambers, each with an opening face, and each staple cartridge contains an anastomotic staples;

[0013] Multiple staple cartridge slots extend downward from any one of the mating areas, and each staple cartridge slot extends horizontally from the slot toward the outer side wall.

[0014] An anastomosis device includes the above-described staple cartridge structure and an anvil, the staple cartridge structure and the anvil being interconnected.

[0015] Compared with previous technologies, the beneficial effects of this utility model are as follows:

[0016] 1. This utility model has a staple cartridge groove in the anastomosis area of ​​the anastomosis surface, thereby discharging the internal liquid to the outside of the stapler and avoiding the presence of tissue fluid that would affect the anastomosis effect of the staples on the tissue; and this design does not increase the thickness of the staple cartridge, so even when compressing thick tissue, it is not easy to damage the tissue.

[0017] 2. Different shapes of staple cartridge slots were designed. Different shapes of staple cartridge slots were selected according to different matching scenarios to meet different matching requirements and ensure the drainage effect.

[0018] 3. An additional occlusal staple slot has been added. On the one hand, the connection between the occlusal staple slot and the staple slot effectively drains tissue fluid; on the other hand, the external occlusal staple slot forms a tooth-like groove structure, which can improve the gripping ability of the anastomosis structure and effectively prevent tissue slippage. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural schematic diagram of Embodiment 1 of the matching structure of this utility model;

[0020] Figure 2 for Figure 1 Top view;

[0021] Figure 3 for Figure 2 Enlarged view at point F;

[0022] Figure 4 This is a schematic diagram of a staple slot with a uniform width.

[0023] Figure 5 A schematic diagram of a variable-width slot structure for the staple cartridge.

[0024] Figure 6 A schematic diagram of a funnel-shaped trough structure for the staple bin;

[0025] Figure 7 A schematic diagram of a gourd-shaped groove structure for the nail storage compartment;

[0026] Figure 8 In order to be in Figure 13 A schematic diagram of Embodiment 2, which adds a staple slot to the basic structure;

[0027] Figure 9 for Figure 1 A schematic diagram of embodiment 3, which adds a snap-fit ​​slot to the basic structure;

[0028] Figure 10 for Figure 9 Enlarged view of point A in the middle;

[0029] Figure 11 This is a side view of the compartment in Example 3;

[0030] Figure 12 for Figure 11 Enlarged view of point B in the middle;

[0031] Figure 13 This is a side view of the matching structure constructed based on Example 3;

[0032] Figure 14 for Figure 5 Enlarged view of point C in the middle;

[0033] Figure 15 This is a top view of the compartment in Example 3;

[0034] Figure 16 This is a schematic diagram showing the flow of tissue fluid after the tissue is clamped by this invention.

[0035] Labeling explanation: 1. Chamber body, 11. Anastomosis surface, 111. Anastomosis area, 12. Screw cavity, 13. Slot, 14. Screw chamber slot, 141. Equal width slot structure, 142. Variable width slot structure, 143. Funnel-shaped slot structure, 144. Gourd-shaped slot structure, 2. Engaging screw chamber slot, 3. Anvil seat, 4. Tooth-shaped structure. Detailed Implementation

[0036] The present invention will now be described in detail with reference to the accompanying drawings:

[0037] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "far", "near", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0038] like Figure 1-12 As shown: A staple cartridge structure includes a cartridge body 1, wherein the cartridge body 1 includes:

[0039] upper surface;

[0040] Two ends;

[0041] The outer sidewalls connecting the two ends;

[0042] The anastomotic surface 11 is located on the upper surface and is divided into two anastomotic areas 111, on the left and right sides.

[0043] The slot 13 is located between the two anastomotic areas 111, extends longitudinally downward from the upper surface, and extends horizontally between the two ends;

[0044] Multiple staple cavities 12, each extending downward from the anastomosis area, and each staple cartridge containing anastomotic staples; the above structures are all existing conventional technologies. Accordingly, the staple cartridge structure itself is elongated, and the slot 13 itself is also elongated.

[0045] This invention features a staple cartridge groove 14 formed in the anastomosis area. Multiple staple cartridge grooves 14 extend downwards from any one of the anastomosis areas 111, and each groove extends horizontally from the slot towards the outer side wall. When the staple cartridge structure and the anvil engage, some tissue contacts the anastomosis surface, and some tissue sinks into the staple cartridge groove 14. Therefore, fluid within the tissue can be more easily expelled through the staple cartridge groove 14. The bottom and sidewalls of the staple cartridge groove 14 also exert a squeezing effect on the tissue, further guiding the fluid out of the tissue more easily.

[0046] The staple slot 14 is recessed, so the final thickness of the cartridge body 1 does not change. This ensures that even when pressing thick tissues, the tissues are not easily damaged, and the cartridge body will not thicken, thus avoiding tissue damage caused by increased thickness.

[0047] Furthermore, compared to existing methods that increase friction and prevent slippage by raising the height of the staple cavity to form a protruding structure, this invention achieves a balance between increasing friction to prevent tissue slippage and reducing the risk of tissue tearing by extending the staple cartridge groove downwards. Specifically, the protruding structure formed by raising the height of the staple cavity has a small force application area on the anastomosing tissue, while pressing the tissue into the staple cartridge groove increases the force application area on the tissue relative to the protruding structure, thus reducing the potential risk of tissue tearing caused by excessive stress concentration.

[0048] At least two rows of staple cavities 12 are evenly distributed in any anastomosis area 111, and any two adjacent rows of staple cavities 12 are staggered.

[0049] The design of the multi-row staple cavities 12 is such that any two adjacent rows of staple cavities 12 are staggered in the front and back direction, which can ensure the anastomosis effect and avoid tissue damage caused by excessive density.

[0050] Each staple cavity 12 has two ends for guiding the feet of the anastomosis staple; the end of the opening face is flush with the anastomosis surface. The opening face of the staple cavity 12, as seen in the plan view, is elongated and parallel to the length direction of the slot and also parallel to the length direction of the entire staple cartridge structure.

[0051] Furthermore, since the staple cavity 12 is equipped with staples, the staples are generally placed in the staple cartridge and are positioned in an upward U-shape. The staple feet are located at the end of the staple cavity 12, and the staple beam spans the middle of the bottom of the staple cavity 12. When the staple is removed, the staple feet of the staple pass through the end of the staple cavity 12.

[0052] The plurality of staple cartridge slots 14 extend horizontally from the slot to the outer wall, passing through the staple cavity 12 or through the anastomosis area between the staple cavities 12, so as to drain tissue fluid to the outer wall.

[0053] Furthermore, the plurality of staple cartridge slots 14 extend horizontally perpendicular to the horizontal extension direction of the slot.

[0054] Furthermore, the staple cartridge groove 14 passes through the middle region of the staple cavity 12 but not through the end of the staple cavity 12. The staple cartridge groove 14 can perfectly avoid the staples, ensuring that the staple cavity 12 can smoothly guide the staples out of the cavity, and also ensuring that the staple feet will not be exposed on the anastomosis surface when not anastomosing.

[0055] Furthermore, the bottom of the staple cartridge groove 14 can be horizontal and parallel to the anastomosis surface; the bottom of the staple cartridge groove 14 can also be inclined, that is, the depth of the staple cartridge groove 14 gradually increases as it moves away from the slot 13, in order to facilitate the removal of tissue fluid.

[0056] Furthermore, to ensure the effectiveness of the drainage, this utility model proposes the following modified implementation methods to meet different matching effects according to different matching scenarios:

[0057] As one implementation method, such as Figure 4 As shown: The staple cartridge groove 14 is a uniformly wide groove structure 141 extending from the narrow groove to the outer side wall. When the staple cartridge structure and the anvil engage with each other, some tissue will contact the anastomosis surface, and some tissue will sink into the staple cartridge groove 14. Therefore, the fluid in the tissue can be more easily discharged through the staple cartridge groove 14. The bottom and side walls of the staple cartridge groove 14 also have a squeezing effect on the tissue, which will guide the tissue fluid to be discharged more easily from the tissue.

[0058] As one of the modified implementation methods, such as Figure 5 As shown: The staple cartridge groove 14 is a widened groove structure 142 that extends from the narrow groove to the outer wall and increases in width. This increasing width design causes the tissue near the narrow groove to be subjected to a tighter squeezing force, thereby achieving more favorable drainage of muscle tissue fluid near the narrow groove. Furthermore, the staple cartridge groove 14 is wider along the outer wall, which can provide a smoother drainage path for tissue fluid, which is conducive to more fully draining tissue fluid to both sides of the staple cartridge during the pre-compression stage before the start of staple assembly.

[0059] As one of the modified implementation methods, such as Figure 6 As shown: To ensure that the staple cartridge groove 14 passes through the central region of the staple cavity 12 without passing through the end of the staple cavity 12, the staple cartridge groove 14 perfectly avoids the end of the staple cavity 12, that is, perfectly avoids the anastomotic staples. This ensures that the staple cavity 12 can guide the anastomotic staples to be stably ejected for tissue anastomosis, while avoiding the local tissue to be anastomosed being pulled by the concave shape of the staple cartridge groove 14, resulting in poor anastomosis effect. The staple cartridge groove 14 extends horizontally between the outer wall and the slot, and has a funnel-shaped groove structure 143. There is a certain distance between the end of the opening face of the staple cavity 12 and the groove structure 143. Between the ends of the opening faces of adjacent staple cavities 12 in the same row, the width of the staple cartridge groove 14 locally narrows to ensure that the end of the opening face of each staple cavity 12 is located on the anastomosis surface, that is, flush with the anastomosis surface.

[0060] As one of the modified implementation methods, such as Figure 7 As shown: The width of the staple cartridge groove 14 increases from the middle to both ends and then decreases to the staple cavity 12, and then extends to the outer wall and the gourd-shaped groove structure 144 of the slot with equal width. This staple cartridge groove design is also to achieve that the width of the staple cartridge groove 14 locally narrows between the ends of the opening surfaces of adjacent staple cavities 12 in the same row, so as to ensure that the ends of the opening surfaces of each staple cavity 12 are located on the mating surface, that is, flush with the mating surface.

[0061] Based on the number of rows of staple cartridges and the location and structure of the staple cartridge slots, the present invention also derives the following three embodiments:

[0062] Example 1

[0063] like Figure 1-3 As shown: The staple cartridge slots 14 are all arranged to avoid the ends of the staple cartridges 12. The staple cartridges include three rows of staple cartridges arranged parallel to the slots 13. The staple cartridge slots 14 avoid passing through the staple cavities 12 of the middle row. The staple cavities 12 of the middle row are all located on the anastomosis surface, that is, there is a staple cartridge slot 14 between any two adjacent staple cavities 12. The staple cartridge slots 14 avoid passing through the ends of one staple cavity 12 of the first and third rows. That is, the ends of the opening surfaces of the staple cavities of the first and third rows are all located on the anastomosis surface. The non-end portion (middle portion) of the opening surface of each staple cavity 12 of the first row is located at the bottom of the slot. Thus, the staple cartridge slots 14 also pass through the middle of one staple cavity 12 of the first and third rows, thereby forming a continuous drainage path for tissue fluid extending from the slot to the outer wall.

[0064] It should be noted that the structural position distribution of the staple cartridge groove 14 in this utility model needs to be considered. First, the staple cartridge groove 14 must be straight to ensure smooth drainage of tissue fluid. Additionally, since the staple cartridge groove 14 is recessed, it might affect the use of the anastomotic staples within the staple cavity 12. Therefore, in designing the staple cartridge groove 14, the anastomosis area 111 is located between any two adjacent staple cavities 12 in the middle row. This arrangement of the staple cartridge groove 14 in this area will not affect the anastomotic staples within the middle row of staple cavities 12. In the prior art, any two adjacent staple cavities 12 in the anastomosis area 111 are staggered in a front-to-back direction to ensure anastomosis and prevent bleeding. Based on this design consideration, the staple cartridge groove 14 is extended to both ends. At this point, the staple cartridge groove 14 also passes through the middle of the opening surface of one staple cavity 12 in the first row and the middle of the opening surface of one staple cartridge in the third row.

[0065] Example 2

[0066] As a modified implementation method, such as Figure 8 As shown, the staple cartridge groove 14 also passes through the middle of the opening surface of the staple cavity 12 in the middle row, and the staple cartridge groove 14 also passes through the area between two adjacent staple cavities 12 in the first row and between two adjacent staple cavities 12 in the third row. The staple cartridge grooves 14 are all set to avoid the ends of the staple cartridge 12. Compared with the scheme of embodiment 1, the number of staple cartridge grooves 14 is increased, which is more conducive to the drainage of tissue fluid.

[0067] The anastomosis area where the staple cartridge groove 14 described in Embodiment 1 and Embodiment 2 is distributed overlaps with the anastomosis area where all staple cavities 12 are distributed.

[0068] Example 3

[0069] As an improved implementation method, such as Figure 9-15 As shown, it also includes a plurality of staple cartridge grooves 2 extending downward from the anastomosis surface, located between the anastomosis area where all staple cavities 12 are distributed and the outer side wall, and also located between the staple cartridge groove 14 and the outer side wall.

[0070] Furthermore, the outer side of the surface of the anastomosis area 111 is provided with an engagement slot 2, there are multiple engagement slots 2, and they are arranged along the slot 13; each of the engagement slots 2 is a toothed groove 22, and some of the toothed grooves 22 are connected to the slot 14 in position to jointly form a channel for drainage.

[0071] Furthermore, the bottom of the occlusal staple chamber 2 can be horizontal and parallel to the anastomosis surface; the bottom of the occlusal staple chamber 2 can also be inclined, that is, the depth of the occlusal staple chamber 2 gradually increases as it moves away from the occlusal staple chamber 2, in order to facilitate the drainage of tissue fluid.

[0072] like Figure 9-15 As shown: Based on Embodiment 1 or 2, in any anastomosis area, a plurality of staple cartridge grooves 2 are further included. The staple cartridge grooves 2 extend downward from the anastomosis area 111, and the plurality of staple cartridge grooves 2 extend slightly from the outer side wall towards the slot direction; and some of the staple cartridge grooves 2 intersect with the corresponding staple cartridge grooves 14. The extension directions of the plurality of staple cartridge grooves are parallel and parallel to the extension direction of the staple cartridge grooves 2.

[0073] By adding occlusal slots, the gripping ability can be further improved, tissue slippage can be prevented, and it also serves as a channel for tissue extraction. It should be noted that the occlusal slots here are mainly located in the anastomosis area between the area where the screw cavity is distributed and the outer wall.

[0074] In any anastomotic area, the number of the staple cartridge slots 2 is greater than the number of the staple cartridge slots 14, which helps to prevent tissue slippage.

[0075] The adjacent spacing between any two adjacent staple cartridge slots 14 is greater than the adjacent spacing between any two adjacent interlocking staple cartridge slots 2. This design helps to prevent tissue slippage.

[0076] The bottom of the staple cartridge groove 2 is equal to or lower than the bottom of the staple cartridge groove 14 to facilitate the drainage of tissue fluid.

[0077] Preferably, the inclination angle of the side walls on both sides of the staple cartridge groove 14 relative to the bottom of the staple cartridge groove 14 is greater than or equal to 90°, and the inclination angle of the side walls on both sides of the engaging staple cartridge groove 2 relative to the bottom of the staple cartridge groove 14 is greater than or equal to 90°. This angle limitation is mainly to facilitate the engagement between the auxiliary tooth-shaped structure 4 provided on the anvil 3 and the engaging staple cartridge groove 2 when the staple cartridge structure and the anvil 3 are engaged, which is more conducive to preventing tissue slippage.

[0078] Furthermore, there is a transverse beam structure between adjacent occlusal screw slots 2. The top width of the transverse beam structure between adjacent occlusal screw slots 2 is greater than zero, which is to prevent the sidewalls of the occlusal screw slots 2 from becoming too sharp and causing tissue damage.

[0079] like Figure 1 , 5As shown: This utility model also discloses an anastomosis device, which includes the above-mentioned staple cartridge structure and an anvil 3, wherein the staple cartridge structure and the anvil 3 are hinged to each other; on the lower surface of the anvil 3, there is also a secondary tooth structure 4 that corresponds to the position of the interlocking staple cartridge groove 2 and has a complementary contour; the inclination of the side walls on both sides of the interlocking staple cartridge groove 2 relative to the bottom of the staple cartridge groove 14 is greater than 90°, which is more conducive to the interlocking between the secondary tooth structure 4 and the interlocking staple cartridge groove 2, and is more conducive to preventing tissue slippage.

[0080] The staple cartridge structure and the staple seat 3 are hinged together in a conventional manner. The two are opened and closed by the firing mechanism of the stapler. The structure and principle are existing technologies, so they will not be described in detail.

[0081] It should be noted that, in order to better define the number of staple cartridge slots and explain their functions, as well as to explain the design scheme and technical effects of this utility model, this utility model defines the slot portion extending straight from the narrow slot to the outer wall as a single staple cartridge slot. Although the staple cartridge slot passes through the middle area of ​​the staple cavity, causing the staple cartridge slot to be partially blocked by the staple cavity, the width of the staple cavity in the extension direction of the staple cartridge slot (perpendicular to the length direction of the staple cartridge structure) is very narrow, which has little impact on the drainage path of tissue fluid. Therefore, the staple cartridge slot can be regarded as an integral slot structure that extends along the length direction perpendicular to the staple cartridge structure and passes through part of the staple cavity.

[0082] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A stapled cartridge structure, comprising a cartridge body (1), the cartridge body (1) comprising: upper surface; Two ends; The outer sidewalls connecting the two ends; The anastomotic surface (11) is located on the upper surface and is divided into two anastomotic areas (111) on the left and right sides. The slot (13) is located between the two anastomotic areas (111), extends longitudinally downward from the upper surface, and extends horizontally between the two ends; Multiple staple chambers (12), each staple chamber is equipped with anastomotic staples; The feature is that a plurality of staple cartridge slots (14) extend downward from any one of the matching areas (111), and each staple cartridge slot (14) extends horizontally from the slot to the outer side wall.

2. The staple cartridge structure according to claim 1, characterized in that: The plurality of staple cartridge slots (14) extend horizontally from the slot to the outer side wall, and at least two rows of staple cavities (12) are evenly distributed in any anastomosis area (111), and any two adjacent rows of staple cavities (12) are staggered.

3. The staple cartridge structure according to claim 1, characterized in that: The staple cartridge slot (14) is a slot structure (141) of equal width that extends from the slot to the outer side wall.

4. The staple cartridge structure according to claim 1, characterized in that: The staple slot (14) is a widened slot structure (142) that extends from the outer wall to the slot and increases in width.

5. The staple cartridge structure according to claim 1, characterized in that: The nail chamber groove (14) is a funnel-shaped groove structure (143) whose width increases from the middle to both ends to the nail cavity (12), and then extends to the outer wall and the slot in an equal manner.

6. The staple cartridge structure according to claim 1, characterized in that: The nail chamber groove (14) is a gourd-shaped groove structure (144) whose width increases from the middle to both ends and then decreases to the nail cavity (12), and then extends to the outer wall and the narrow groove in an equal width manner.

7. The staple cartridge structure according to claim 1, characterized in that: The staple cartridge includes three rows of staple cartridges arranged parallel to the slot, wherein the staple cartridge slot (14) passes between any two adjacent staple cavities (12) in the middle row; and the staple cartridge slot (14) also passes through the middle of the opening surface of a staple cavity (12) in the first row and the middle of the opening surface of a staple cartridge in the third row.

8. The staple cartridge structure according to claim 1, characterized in that: Each staple cartridge has an open face with two ends for guiding the feet of the staples; the ends of the open face are flush with the anastomosis face.

9. The staple cartridge structure according to claim 1, characterized in that: The staple cartridge includes three rows of staple cartridges arranged parallel to the slot, wherein the staple cartridge slot (14) passes through the middle of the opening of the staple cavity (12) of the middle row, and the staple cartridge slot (14) also passes between two adjacent staple cavities (12) of the first row and between two adjacent staple cavities (12) of the third row.

10. The staple cartridge structure according to any one of claims 1-9, characterized in that: In any anastomosis area, there are also multiple staple cartridge slots (2), which extend downward from the anastomosis area (111) and extend from the outer side wall toward the slot direction; and some of the staple cartridge slots (2) are connected to the staple cartridge slot (14).

11. The staple cartridge structure according to claim 10, characterized in that: The bite-shaped staple slot (2) is located between the area in any anastomosis area (111) where staple cavities (12) are distributed and the corresponding outer wall of the cover anastomosis area (111).

12. The staple cartridge structure according to claim 10, characterized in that: In any anastomotic zone, the number of the engagement slots (2) is greater than the number of the slots (14).

13. The staple cartridge structure according to claim 10, characterized in that: The distance between any two adjacent staple cartridge slots (14) is greater than the distance between any two adjacent interlocking staple cartridge slots (2).

14. The staple cartridge structure according to claim 10, characterized in that: The bottom of the engagement slot (2) is equal to or lower than the bottom of the slot (14); the inclination of the side walls on both sides of the slot (14) relative to the bottom of the slot (14) is greater than or equal to 90°, and the inclination of the side walls on both sides of the engagement slot (2) relative to the bottom of the slot (14) is greater than or equal to 90°.

15. A stapler, characterized in that: Includes the staple cartridge structure and the staple seat (3) as described in any one of claims 1-14, wherein the staple cartridge structure and the staple seat (3) are interconnected.

16. The stapler according to claim 15, characterized in that: The lower surface of the anvil (3) is provided with auxiliary tooth-shaped structures (4) on the left and right sides, which correspond to the position of the bite pin slot (2) and have complementary contours.

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