Nail cartridge assembly and medical stapler including the same

Abstract

The present invention provides a stapler assembly and a medical stapler including the same, wherein the stapler assembly includes at least one staple band and a plurality of protrusions, wherein the staple band includes a staple band body extending in the axial direction of the medical stapler, wherein the staple band body is provided with at least one row of staples sequentially arranged in the extending direction of the staple band body, wherein the staples are connected to the staple band body through their connecting ends; wherein the protrusions correspond to the staples one by one, wherein the protrusions are located at the distal end side of the connecting end of the corresponding staple, and when the stapler is fired, the connecting end of the staple contacts the protrusions and disconnects from the staple band body, so that the staples are separated from the staple band body. By adopting the present invention, staples are formed on a staple band, and installation and replacement are more convenient, and protrusions are provided to facilitate the separation of staples from the staple band body.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a staple cartridge assembly and a medical stapler comprising the same. Background Art

[0002] Digestive tract diseases are one of the most common diseases in humans. During the treatment process, medical staplers are often used to replace the doctor's manual operation to anastomose physiological tissues such as the digestive tract. Medical staplers are a common surgical instrument, most of which use axial internal stapling to form end-to-end or end-to-side anastomosis of physiological tissues such as the esophagus, stomach, and intestines during surgery. During the anastomosis, the two sections of tissue are contained in the medical stapler. After the firing is completed, a circular anastomosis is formed on the tissue, reconstructing the human body channel.

[0003] In the prior art, a medical stapler includes a medical stapler body, an operating handle movably connected to the medical stapler body, and a stapler anvil assembly matched with the body. The medical stapler body includes a stapler magazine assembly and a stapler magazine assembly frame arranged on the distal side. In the present invention, the distal side and the proximal side are relative to the operator, the end closer to the operator is the proximal side, and the end farther from the operator, that is, the end closer to the surgical site is the distal side. During surgery, the stapler magazine assembly and the stapler anvil assembly are closed, and the operating handle is held to push the staples toward the tissue, and the tissue is stapled by the formation of the staples in the stapler magazine assembly at the stapler anvil assembly.

[0004] In the existing staple cartridge assembly, the staples are mostly separately arranged one by one. However, such staples need to be individually installed in the staple holes of the staple cartridge assembly, which is very inconvenient to install. Summary of the invention

[0005] In view of the problems in the prior art, the purpose of the present invention is to provide a staple magazine assembly and a medical stapler including the same, in which staples are formed on a staple belt, which is more convenient to install and replace, and a protrusion is provided to facilitate the separation of the staples from the staple belt body.

[0006] An embodiment of the present invention provides a stapler assembly for a medical stapler, the stapler assembly comprising at least one stapler band and a plurality of protrusions, the stapler band comprising a stapler band body extending in the axial direction of the medical stapler, the stapler band body being provided with at least one row of staples sequentially arranged in the extending direction of the stapler band body, the staples being connected to the stapler band body through their connecting ends;

[0007] The protrusions correspond to the staples one by one, and the protrusions are located at the distal end of the corresponding connecting ends of the staples. When the medical stapler is fired, the connecting ends of the staples contact the protrusions and are disconnected from the staple belt body.

[0008] Optionally, the staple belt body is provided with two rows of staples, and the two rows of staples are staggered along the extension direction of the staple belt body; the protrusions corresponding to the two rows of staples are staggered along the extension direction of the staple belt body.

[0009] Optionally, a connecting rod is provided between two rows of staples, and the protrusion is provided on the top of the connecting rod.

[0010] Optionally, the nail belt body is provided with a bump accommodating opening for accommodating the bump at a position corresponding to each bump.

[0011] Optionally, the distal side surface of the protrusion is a slope that gradually rises from its distal side to its proximal side.

[0012] Optionally, the top end of the distal side surface of the protrusion smoothly transitions to the top surface of the protrusion.

[0013] Optionally, the proximal side surface of the protrusion is a slope that gradually rises from its distal side to its proximal side.

[0014] Optionally, the proximal side surface of the protrusion is formed as a cutting edge.

[0015] Optionally, a surface of the staple band body on one side facing the anvil of the medical stapler is a staple magazine assembly surface, and a top end of the protrusion protrudes from the staple magazine assembly surface.

[0016] Optionally, a fitting opening is provided on the proximal side of the protrusion, and the connecting end of the staple has a connecting beam, and the connecting beam is located in the fitting opening.

[0017] Optionally, the nail magazine assembly further includes a fixing member, and the distal end side of the nail band is fixed to the fixing member.

[0018] Optionally, limiting members are respectively provided on both sides of each row of the staple bands, the limiting members extend along the axial direction of the medical stapler, and the limiting members define the stapler-exiting direction of the staples.

[0019] Optionally, the staple cartridge assembly further comprises a staple cartridge cover, wherein the staple cartridge cover covers an upper surface of the staple band body, and the staple cartridge cover is provided with staple outlets corresponding one-to-one to the staples.

[0020] Optionally, the protrusion is provided at the nail outlet of the nail magazine cover, and the protrusion protrudes from the lower surface of the nail magazine cover.

[0021] Optionally, in an initial state, there is a certain interval between the distal side surface of the connecting end of the staple and the proximal side surface of the protrusion.

[0022] An embodiment of the present invention further provides a medical stapler, comprising any one of the staple cartridge assemblies described above.

[0023] The stapler assembly and the medical stapler including the stapler assembly provided by the present invention have the following advantages:

[0024] The present invention provides a stapler assembly for a medical stapler, wherein staples are formed on a staple belt, so that installation and replacement are more convenient. After an operation is completed, only the staple belt can be replaced. A protrusion is arranged on the staple belt body to facilitate the separation of the staples from the staple belt body, so that the staples can be separated from the stapler assembly during the operation to staple tissues, thereby avoiding the situation of staple jamming during the operation and improving the operation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Other features, objectives and advantages of the present invention will become more apparent from a reading of the detailed description of non-limiting embodiments made with reference to the following accompanying drawings.

[0026] Figure 1 It is a schematic diagram of the cooperation between a nail magazine assembly, a nail anvil and a nail magazine assembly frame according to an embodiment of the present invention;

[0027] Figure 2 is a schematic diagram of the cooperation between a staple cartridge assembly and a staple cartridge assembly frame according to an embodiment of the present invention;

[0028] Figure 3 It is a front view of the cooperation between the staple cartridge assembly, the staple cartridge assembly frame and the main body according to one embodiment of the present invention;

[0029] Figure 4 It is a left side view of the nail magazine assembly, the nail magazine assembly frame and the main body in accordance with an embodiment of the present invention;

[0030] Figure 5 yes Figure 4 Sectional view in the AA direction;

[0031] Figure 6 It is a structural schematic diagram of the cooperation between the nail magazine assembly and the nail pushing piece according to one embodiment of the present invention;

[0032] Figure 7 yes Figure 6 A schematic diagram of the structure after removing the limiter on one side;

[0033] Figure 8 and Fig. 9 yes Figure 7 Enlarged view of point B in the middle;

[0034] Fig.10 is a schematic structural diagram of a nail belt according to an embodiment of the present invention;

[0035] Fig.11 is a schematic structural diagram of a connecting rod according to an embodiment of the present invention;

[0036] Fig.12 It is a structural schematic diagram of another embodiment of the present invention in which a protrusion is arranged on a nail magazine cover;

[0037] Fig.13 for Fig.12 Exploded diagram.

[0038] Reference numerals:

[0039] 1 Nail magazine assembly frame 6 Connecting rod

[0040] 2 Anvil assembly 61 First embodiment of the projection

[0041] 3 Distal side of the fixing member 611 protrusion

[0042] 4 Nail tape 612 matching port

[0043] 41 staple 613 proximal side of the protrusion

[0044] 411 puncture end 7 push nail block

[0045] 412 connection end 71 disconnection portion

[0046] 42 nail belt body 8 push knife rod

[0047] 421 convex receiving opening 81 cutter

[0048] 5 Limiting piece 9 Body

[0049] 15 Nail magazine cover

[0050] 16 Nail outlet

[0051] 17 Second Embodiment Bump DETAILED DESCRIPTION

[0052] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted.

[0053] In order to solve the technical problems in the prior art, the present invention provides a stapler assembly for a medical stapler and a medical stapler including the stapler assembly. The stapler assembly includes at least one staple band and a plurality of protrusions, the staple band includes a staple band body extending along the axial direction of the medical stapler, the staple band body is provided with at least one row of staples arranged in sequence along the extension direction of the staple band body, and the staples are connected to the staple band body through their connecting ends; the protrusions correspond to the staples one by one, the protrusions are located at the distal end side of the connecting end of the corresponding staple, and when the stapler is fired, the connecting end of the staple contacts the protrusion to disconnect from the staple band body, so that the staples are detached from the staple band body.

[0054] The present invention forms the staples on a staple belt, and during installation, the staple belt can be directly installed as a whole into the staple magazine assembly, and the staple magazine assembly is more convenient to operate. The staples are connected to the staple belt body through their connecting ends. In order to make it easier for the staples to detach from the staple belt body during surgery, there is a protrusion on the staple belt body that is separate from or integral with the staple belt body. When the doctor holds the operating handle to fire the stapler, the staple pusher block moves from the proximal side to the distal side, thereby pushing the staples to close and form. After the staples are formed, the connecting end of the staples contacts the protrusion. Under the action of the pushing force of the staple pusher block toward the distal side and the contact force of the protrusion, the connecting end of the staples detaches from the staple belt body, so that the staples can detach from the staple magazine assembly.

[0055] Combine the following Figures 1 to 11 The structure of a staple cartridge assembly and a medical stapler according to an embodiment of the present invention is introduced.

[0056] like Figures 1 to 5 As shown, in this embodiment, the medical stapler includes a stapler assembly frame 1 and a stapler anvil 2 located at the distal side, a stapler assembly is installed in the stapler assembly frame 1, and the proximal side of the stapler assembly frame 1 is connected to the stapler body 9. The stapler assembly includes two staple bands 4 and a plurality of protrusions 61, the staple band 4 includes a staple band body 42 extending along the axial direction of the medical stapler, the staple band body 42 is provided with two rows of staples 41 arranged in sequence along the extension direction of the staple band body 42, and the staples 41 are connected to the staple band body 42 through their connecting ends 412. The protrusions 61 correspond one to one with the staples 41. In a preferred embodiment, the protrusions 61 are provided on the connecting rod 6. The protrusions 61 are located on the distal side of the connecting end 412 of the corresponding staple 41. The staples 41 are provided on one side of the staple band body 42, and the other side of the staple band body 42 is a stapler assembly surface facing the staple anvil assembly 2, that is, at Figure 3 From the perspective of FIG. 4 , the upper surface of the staple belt body 42 is the staple cartridge assembly surface, and the lower surface is provided with the anastomotic staples 41 .

[0057] The proximal side of the staple cartridge assembly frame 1 is provided with a knife pusher rod 8 and a nail pusher block 7, and the distal side of the knife pusher rod 8 is provided with a cutter 81. A cutter groove for the cutter 81 to pass through is formed between the two staple bands. When the doctor holds the operating handle (not shown in the figure) to fire the stapler, the knife pusher rod 8 pushes the nail pusher block 7 to move toward the distal side of the stapler, and the nail pusher block 7 sequentially contacts the staples 41 and pushes the staples 41 to rotate toward the anvil direction. The connecting end 412 of the staple 41 contacts the protrusion 61, and under the action of the thrust of the nail pusher block 7 and the contact force of the protrusion 61, the connection between the connecting end 412 of the staple 41 and the staple band body 42 is disconnected, so that the staples 41 are separated from the staple band body 42.

[0058] In the present invention, the distal side and the proximal side are relative to the operator, wherein the distal side refers to the end farther from the operator, and the proximal side refers to the end closer to the operator. Figure 1 In the perspective of FIG. 1 , the distal side of the stapler assembly frame 1 refers to the left end in the figure, the proximal side refers to the right end in the figure, the distal side of the stapler anvil 2 refers to the left end in the figure, and the proximal side refers to the right end in the figure. The axial direction of the medical stapler refers to the direction from the proximal side of the medical stapler to the distal side, that is, Figure 2 The direction in which the middle nail belt body 42 extends. For a component, its inner side refers to the side closer to the axis of the stapler relative to its outer side.

[0059] In this embodiment, the staple belt body 42 of each staple belt 4 is respectively provided with two rows of staples 41, and the two rows of staples 41 are staggered along the extension direction of the staple belt body 42; corresponding to the staples 41, the two rows of protrusions 61 of the same staple belt 4 are staggered along the extension direction of the staple belt body 42. In the present invention, the number of staple belts 4 and the number of rows of staples 41 are not limited to this embodiment, and in other alternative embodiments, the number of staple belts 4 can be reduced or increased, and the number of rows of staples 41 can be reduced or increased, all of which fall within the protection scope of the present invention.

[0060] In this embodiment, the nail magazine assembly includes a fixing part 3, a limiting part 5, a connecting rod 6 and a nail band 4 on the distal side, and a nail pushing block 7 is also provided on the proximal side of the nail magazine assembly. In one production process, the fixing part 3, the limiting part 5 and the connecting rod 6 are molded by injection molding, and the limiting part 5 and the connecting rod 6 are embedded in the fixing part 3 for injection molding; then they are installed into the nail magazine assembly, and the proximal side of the nail magazine assembly is welded to the proximal side of the connecting rod 6. In another process, the fixing part 3 and the connecting rod 6 can also be provided separately and then connected together; then the nail band 4 is installed. The distal side of the nail band 4 is fixed to the fixing part 3. The connection between the distal side of the nail band 4 and the fixing part 3 can be a non-detachable connection or a detachable connection. Figure 5 As shown, in order to limit the direction of the staples 41, a limiting member 5 and a connecting rod 6 are respectively provided on both sides of each row of the staple bands 4, and the limiting member 5 and the connecting rod 6 extend along the axial direction of the medical stapler, and the cutting groove is defined between the two inner limiting members 5 of the two staple bands 4. The limiting member 5 and the connecting rod 6 jointly limit the accommodation space and the staple direction of the staples 41, so as to avoid the staples 41 being misplaced in the staple magazine assembly or being stuck due to deviation in direction when being ejected. In this embodiment, both sides of the axial direction of each staple band 4 are limited by the limiting member 5 and the connecting rod 6, that is, each staple 41 is limited by the limiting member 5 or the connecting rod 6 on both sides along the axial direction, so as to prevent the staples 41 from deviating to the inside or outside of the staple magazine assembly when moving from the staple magazine assembly to the tissue, that is, the staples can only move along the axial direction under the action of the limiting member 5 and the connecting rod 6, and cannot deviate from the axial direction. The stapler 41 further includes a puncture end 411, which is located at an end away from the connection end 412. When the stapler is fired, the puncture end 411 of the stapler 41 moves toward the anvil assembly under the action of the staple pusher block 7, and passes through the space defined between the limiter 5 and the connecting rod 6, enters the tissue, and is formed on the anvil surface of the anvil assembly 2.

[0061] In other optional embodiments, the protrusion 61 and the nail belt body 42 can be integrally arranged, for example, the protrusion 61 is formed on the nail magazine component surface of the nail belt body 42, or the protrusion 61 is welded to the nail magazine component surface of the nail belt body 42.

[0062] In this embodiment, the protrusion 61 and the nail belt body 42 can also be arranged separately. Figures 6 to 11 As shown, a connecting rod 6 is arranged between the two rows of staples 41, and a protrusion 61 is arranged on the top of the connecting rod 6, that is, the protrusion 61 is arranged on the side of the connecting rod 6 close to the staple cartridge surface of the staple cartridge assembly. The protrusion 61 extends upward from one side of the staple belt body 42. In order to more clearly show the matching structure of the staple belt 4 and the connecting rod 6, Figure 7The outermost limiting member 5 is omitted. Furthermore, the positions of the nail belt body 42 corresponding to each of the protrusions 61 are respectively provided with protrusion receiving openings 421 for receiving the protrusions 61. The protrusions 61 pass through the protrusion receiving openings 421 and protrude from the surface of the nail magazine assembly. The connecting rod 6 can also define the accommodation space and the staple ejection direction of the staples 41 together with the limiting member 5. When the staples 41 are fired, both sides are guided by the side of the limiting member 5 and the side of the connecting rod 6 at the same time, and can smoothly pass through the opening on the surface of the nail belt body 42 without deflection from the axial direction to cause staple jamming. Among them, the limiting member 5 and the connecting rod 6 are preferably made of relatively hard metal, such as stainless steel.

[0063] In the prior art, each staple is installed in a single staple hole, so there is no problem of staple positioning. In the structure using the staple belt 4, since each staple hole is no longer provided separately, it is necessary to further solve the problem of staple positioning in the staple belt 4. Figure 8 As shown, in this embodiment, the connecting rod 6 can also limit the position of the staples 41 in the staple magazine assembly together with the limiting member 5. That is, each row of staples 41 is arranged between the limiting member 5 on one side and the connecting rod 6 on one side. Every two adjacent connecting rods 6 and the limiting member 5 together define a staple accommodating space along the axial direction of the stapler. The up and down movement of the staples 41 can only be limited in this staple accommodating space, and will not deviate to one side of the limiting member 5 or the connecting rod 6. In the process of the staples 41 moving toward the staple magazine assembly surface and disengaging from the staple belt body 42, the movement direction of the staples 41 is also limited by the connecting rod 6 and the limiting member 5, so that the staples 41 can be accurately positioned at the position on the tissue that needs to be stapled.

[0064] Therefore, this embodiment not only solves the problem of convenient detachment of the staples 41 in the staple belt 4 during surgery, but also further solves the problem of positioning the staples 41 in the staple belt 4.

[0065] In this embodiment, the distal side surface 611 of the protrusion 61 is an inclined surface that gradually rises from the distal side to the proximal side, and the distal side surface 611 is smoothly set as a whole, that is, the top of the distal side surface 611 smoothly transitions to the top surface of the protrusion 61, for example, a smooth chamfer is provided between the distal side surface 611 and the top surface of the protrusion 61 to prevent sharp edges from damaging tissue when the stapler is closed. The proximal side surface 613 of the protrusion 61 opposite to the distal side surface 611, that is, the proximal side surface 613 adjacent to the connecting end 412, is also set as an inclined surface that gradually rises from the distal side to the proximal side to improve the matching effect with the connecting end 412. Further, the proximal side surface 613 can be formed as a cutting edge to enhance the shearing effect on the connecting end 412. In a preferred embodiment, in the initial state, a certain interval is provided between the connecting end 412 and the proximal side surface 613 to ensure that the deformation of the staple 41 during the rotation process will not be blocked by the proximal side surface 613, and to ensure that the staple is not separated from the staple band before it is fully formed.

[0066] like Figures 8 to 11 As shown, the proximal side of the projection 61 is provided with a mating opening 612, and the connecting end 412 of the staple 41 has a connecting beam, and the connecting beam is located in the mating opening 612, that is, in the direction from the proximal side to the distal side, the projection 61 at least partially overlaps with the connecting end 412, so as to increase the contact area between the connecting end 412 of the staple 41 and the projection 61 when the staple is separated from the staple belt 4. In this embodiment, the staple pusher block 7 is a wedge-shaped staple pusher block 7, and the staple pusher block 7 has a disconnection portion 71 corresponding to the connecting end 412 of the staple 41. Fig. 9 As shown, when the stapler is fired, the stapler pusher block 7 pushes the stapler toward the distal end under the action of the knife pusher rod 8, that is, the stapler pusher block 7 pushes the stapler toward the distal end. Fig. 9 The stapler 41 is pushed by the stapler pusher block 7 toward the distal end of the stapler, and the puncture end 411 of the stapler 41 moves toward the anvil assembly 2. The puncture end 411 of the stapler 41 rotates about the anvil assembly 2 with the connecting end 412 as the axis. The rotation direction is as follows: Fig. 9 As shown in the D direction in FIG. 1 , the connecting beam contacts the proximal side of the protrusion 61, and the connecting beam applies a force to the protrusion 61 toward the distal side of the stapler, and the protrusion 61 applies a force to the connecting beam along the protrusion 61. Fig. 9 The reaction force in the middle E direction separates the connecting beam of the staple 41 at the protrusion 61, so that the staple 41 is separated from the staple belt 4, and the staple 41 is formed at the staple anvil surface of the staple anvil assembly 2 to staple the tissue. At the same time, the cutter 81 moves from the proximal side to the distal side in the cutter groove to separate the tissue, thereby achieving tissue staple and cutting.

[0067] like Fig.12 and Fig.13FIG. 1 shows the structure of a nail magazine assembly according to another embodiment of the present invention. The difference between this embodiment and the previous embodiment is that the protrusion 61 is not arranged on the connecting rod, but on the nail magazine cover 13. Fig.12 As shown, the staple cartridge assembly further includes a staple cartridge cover 15, which covers the upper surface of the staple belt body 42, and is provided with staple outlets 16 corresponding to the staples 41. When the staples 41 are stapled, the piercing ends 411 of the staples 41 extend from the staple outlets 16 toward the staple anvil assembly 2. The staple outlets 16 of the staple cartridge cover 15 are provided with the protrusions 61, which protrude from the lower surface of the staple cartridge cover 15 and extend toward the staples 41.

[0068] The stapler assembly and the medical stapler including the stapler assembly provided by the present invention have the following advantages:

[0069] The present invention provides a stapler assembly for a medical stapler, wherein staples are formed on a staple belt, so that installation and replacement are more convenient. After an operation is completed, only the staple belt can be replaced. A protrusion is arranged on the staple belt body to facilitate the separation of the staples from the staple belt body, so that the staples can be separated from the stapler assembly during the operation to staple tissues, thereby avoiding the situation of staple jamming during the operation and improving the operation effect.

[0070] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A nail magazine assembly, characterized in that: Used in a medical stapler, the stapler assembly comprises at least one staple band and a plurality of protrusions, the staple band comprises a staple band body extending in the axial direction of the medical stapler, the staple band body is provided with at least one row of staples sequentially arranged in the extending direction of the staple band body, and the staples are connected to the staple band body through their connecting ends; The proximal side surface of the protrusion is formed as a cutting edge, and the protrusion corresponds to the staples one by one. The protrusion is located on the distal side of the connecting end of the corresponding staple, and when the medical stapler is fired, the connecting end of the staple contacts the protrusion and disconnects from the staple belt body.

2. The staple cartridge assembly according to claim 1, characterized in that: The staple belt body is provided with two rows of staples, and the two rows of staples are staggered along the extension direction of the staple belt body; the protrusions corresponding to the two rows of staples are staggered along the extension direction of the staple belt body.

3. The staple cartridge assembly according to claim 2, characterized in that: A connecting rod is arranged between the two rows of staples, and the top of the connecting rod is provided with the protrusion.

4. The staple cartridge assembly according to claim 3, characterized in that: The nail belt body is provided with a bump accommodating opening for accommodating the bump at a position corresponding to each bump.

5. The staple cartridge assembly according to claim 1, characterized in that: The distal side surface of the protrusion is a slope that gradually rises from the distal side to the proximal side.

6. The staple cartridge assembly according to claim 5, characterized in that: The top end of the distal side surface of the protrusion smoothly transitions to the top surface of the protrusion.

7. The staple cartridge assembly according to claim 1, characterized in that: The proximal side surface of the projection is a slope that gradually rises from the distal side to the proximal side.

8. The staple cartridge assembly according to claim 1, characterized in that: A surface of the staple band body facing the staple anvil of the medical stapler is a staple cartridge assembly surface, and a top end of the protrusion protrudes from the staple cartridge assembly surface.

9. The staple cartridge assembly according to claim 8, characterized in that: A matching opening is provided on the proximal end side of the protrusion, and a connecting beam is provided on the connecting end of the staple, and the connecting beam is located in the matching opening.

10. The staple cartridge assembly according to claim 1, characterized in that: The nail magazine assembly also includes a fixing piece, and the distal end side of the nail band is fixed on the fixing piece.

11. The staple cartridge assembly according to claim 1, characterized in that: Limiting pieces are also provided on both sides of each row of the staple belts. The limiting pieces extend along the axial direction of the medical stapler and define the staple-exiting direction of the staples.

12. The staple cartridge assembly according to claim 1, characterized in that: The staple cartridge assembly further comprises a staple cartridge cover, which covers the upper surface of the staple belt body, and is provided with staple outlets corresponding to the staples one by one.

13. The staple cartridge assembly according to claim 12, characterized in that: The protrusion is arranged at the nail outlet of the nail magazine cover, and the protrusion protrudes from the lower surface of the nail magazine cover.

14. The staple cartridge assembly according to claim 1, characterized in that: In an initial state, there is a certain interval between the distal side surface of the connecting end of the staple and the proximal side surface of the protrusion.

15. A medical stapler, characterized in that: A nail magazine assembly comprising any one of claims 1 to 14.

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