End execution unit for anastomat and anastomat

Abstract

The utility model provides an end portion execution unit for an anastomat, which comprises a cartridge assembly, the cartridge assembly comprises a nail cartridge, a linear feeding groove and a cutting blade, the linear feeding groove and the cutting blade are arranged on the nail cartridge, the cutting blade is arranged in the feeding groove and is provided with a cutting portion located above the feeding groove, and the linear feeding groove and the cutting portion are arranged in the cartridge assembly. The cutting blade can move along the central axis of the feed groove and rotates around the central axis of the cutting blade while moving along the central axis. The problems that in the prior art, a cutting knife in an end executing unit is inconvenient to replace, the service life of the cutting knife is short, and the use cost of an anastomat is high are solved.

Description

Technical Field

[0001] The utility model relates to the field of medical device manufacturing, in particular to an end execution unit for a stapler and the stapler. Background Art

[0002] In minimally invasive surgery, the stapler is a core instrument whose design and application are directly related to the success rate of surgery and postoperative recovery. In traditional stapler designs, the cutting blade is fixed to the barrel assembly of the instrument via a blade rod. This fixed structure presents significant technical limitations in actual use.

[0003] Specifically, due to the inevitable wear and tear of the cutting blade over long-term and frequent use, the blade gradually becomes blunt, which directly affects its cutting effect, potentially leading to an unsmooth surgical procedure and even affecting the surgical outcome. More importantly, under the existing technical framework, once the cutting blade is worn to the point where it no longer meets surgical requirements, the entire stapler often needs to be replaced, which not only increases medical costs and wastes resources, but also may cause unnecessary delays for patients who urgently need surgery due to instrument replacement.

[0004] Furthermore, existing cleaver designs often utilize a linear cutting method. This cutting method can be inefficient when dealing with complex tissue structures due to the single cutting path, increasing surgical time and patient risk. Furthermore, the high friction generated by linear cutting further exacerbates blade wear and shortens the cleaver's lifespan.

[0005] In summary, the design and use of the cutting blades in existing staplers present two significant issues: first, the cutting blade is difficult to replace, which increases the overall cost of the device and affects surgical efficiency; second, the cutting blade has a relatively short service life, and the linear cutting method is not conducive to improving cutting efficiency and maintaining the life of the device. Therefore, developing a stapler structure that can facilitate the replacement of the cutting blade and extend the tool life and improve cutting efficiency through innovative cutting methods has become an important direction for current stapler research and development. Utility Model Content

[0006] The purpose of the present utility model is to provide an end execution unit and an anastomosis device for an anastomosis device, so as to solve the problem that the cutting knife in the end execution unit in the prior art is inconvenient to replace, resulting in an increase in the cost of using the anastomosis device and affecting the surgical efficiency; and the cutting knife has a short service life, and the straight-line cutting method is not conducive to improving the cutting efficiency and maintaining the life of the anastomosis device.

[0007] In order to achieve the above-mentioned purpose of the present invention, one embodiment of the present invention provides an end execution unit for a stapler, including a magazine assembly, the magazine assembly including a nail magazine, a linear tool groove arranged on the nail magazine, and a cutting blade, wherein the cutting blade is arranged in the tool groove and has a cutting portion located above the tool groove, the cutting blade can move along the central axis of the tool groove and is constructed to rotate around its own central axis while moving along the central axis.

[0008] As a further improvement of the embodiment of the present invention, the cutting blade is configured as a circular blade, and the circular blade is provided with a mounting shaft along its central axis, and the mounting shaft is arranged in a direction perpendicular to the central axis.

[0009] As a further improvement of an embodiment of the present utility model, the magazine assembly includes a nail magazine body, the end execution unit includes a magazine base, the nail magazine body is detachably mounted and retained on the magazine base through a support member, the nail magazine is formed on the nail magazine body, the tool groove passes through the nail magazine body and the bottom wall of the tool groove is formed on the magazine base.

[0010] As a further improvement of the embodiment of the present invention, it also includes a dowel seat, which is pivotally connected to the bin base and can move relative to it to close or open.

[0011] As a further improvement of the embodiment of the present utility model, the magazine assembly also includes a transmission component, which includes a gear and a linear rack. When the anvil seat and the magazine base are closed, the linear rack is arranged on the bottom wall of the tool groove or the anvil seat in a direction parallel to the central axis. The gear is coaxial with the circular blade and is sleeved on the mounting shaft. The gear can engage with the linear rack to drive the circular blade to move along the central axis and pivot around the central axis.

[0012] As a further improvement of the embodiment of the present invention, the staple cartridge is provided with suture staples, the cartridge assembly includes a staple pushing slider, the mounting shaft is provided on the staple pushing slider and can pivot relative to the staple pushing slider, the staple pushing slider is provided in the cutting groove and can move along the central axis to trigger the suture staples, and drive the circular blade to move along the central axis and pivot around the central axis.

[0013] As a further improvement of an embodiment of the present utility model, the nail magazine body has a proximal end and a distal end in the direction of the central axis, the circular blade is configured to be used for cutting the tissue to be cut when it moves toward the distal end in the tool groove, and the nail pushing slider is provided with a recessed portion on the side facing the distal end, and the circular blade has a cutting surface located in the recessed portion and facing the distal end side, and when the circular blade rotates toward the distal end, the lower side of the circular blade rotates toward the distal end.

[0014] As a further improvement of an embodiment of the present invention, the end execution unit further includes a driving assembly, which is used to abut against the nail pushing slider to drive the nail pushing slider to move toward the distal end or separate from the nail pushing slider.

[0015] As a further improvement of the embodiment of the present utility model, the driving assembly includes a push rod and a push head connected to one end of the push rod, the push head is used to abut or separate from the push nail slider, the push head has two side walls arranged back to back, the two side walls are spaced apart in a direction perpendicular to the axial direction of the linear tool groove, and the two side walls are symmetrically provided with a first boss and a second boss, respectively, the first boss and the second boss are spaced apart in the vertical direction, and a limiting groove is provided on the pin support, the first boss can be limited in the limiting groove, the second boss can be limited in the linear tool groove, and the first boss and the second boss can both move in the direction parallel to the axial direction of the linear tool groove.

[0016] An embodiment of the present invention further provides a stapler comprising the end execution unit as described above.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] On the one hand, the cutting blade moves along the central axis of the knife groove to cut the tissue to be cut; on the other hand, the cutting blade continuously rotates around its central axis while moving along the central axis, thereby constantly changing the cutting surface used to cut the tissue to be cut. This arrangement can effectively extend the life of the cutting blade, thereby increasing the service life of the entire stapler and reducing the consumption cost of the stapler. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic structural diagram of a stapler provided in one embodiment of the present utility model;

[0020] Figure 2 for Figure 1 Schematic diagram of the local explosion structure;

[0021] Figure 3A schematic structural diagram of an end execution unit provided in one embodiment of the present utility model;

[0022] Figure 4 for Figure 3 Enlarged view of the M in the middle;

[0023] Figure 5 for Figure 3 Schematic diagram of the explosion structure;

[0024] Figure 6 for Figure 5 Schematic diagram of the structure of the middle push pin slider;

[0025] Figure 7a for Figure 3 Schematic diagram of the structure of the magazine assembly of the middle end execution unit when it is installed on the magazine base;

[0026] Figure 7b for Figure 3 Schematic diagram of the structure of the magazine assembly of the middle end execution unit installed in place on the magazine base and cooperating with the drive assembly;

[0027] Figure 8a for Figure 1 Schematic diagram of the local structure of the stapler when the cutting blade is pushing the knife;

[0028] Figure 8b for Figure 1 Schematic diagram of the local structure of the stapler when the cutting blade is retracted.

[0029] The above description of the drawings includes the following reference numerals:

[0030] 10. End execution unit;

[0031] 1. Magazine assembly;

[0032] 11. Nail bin body;

[0033] 111. Nail warehouse;

[0034] 112. Tool groove;

[0035] 113. Suture staples;

[0036] 114, proximal;

[0037] 115, distal end;

[0038] 12. Cutting blade;

[0039] 121. Install the shaft;

[0040] 13. Transmission components;

[0041] 131. Gear;

[0042] 132. Linear rack;

[0043] 15. Push pin slider;

[0044] 151, blade mounting portion;

[0045] 1511, recessed portion;

[0046] 152. Suture trigger unit;

[0047] 1521, positioning groove;

[0048] 2. Anvil;

[0049] 3. Drive components;

[0050] 31. Putting;

[0051] 32. Push the head;

[0052] 321, first boss;

[0053] 322, second boss;

[0054] 4. Warehouse base. DETAILED DESCRIPTION

[0055] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0056] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0057] In the present invention, unless otherwise specified, directional words such as "up, down, top, bottom" are usually used with reference to the directions shown in the drawings, or with reference to the components themselves in the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit the present invention.

[0058] In order to solve the problems of the inconvenience of replacing the cutting blade in the end effector unit in the prior art, which leads to increased cost of stapler use and reduced surgical efficiency, as well as the short service life of the cutting blade and the linear cutting method that is not conducive to improving cutting efficiency and maintaining the life of the stapler, the utility model provides an end effector unit for a stapler and a stapler.

[0059] The technical solution and its implementation process will be further explained below with reference to the accompanying drawings.

[0060] refer to Figure 1-8b As shown, the utility model provides an end execution unit 10 for a stapler, including a magazine assembly 1, wherein the magazine assembly 1 includes a staple magazine 111, a linear tool groove 112 arranged on the staple magazine 111, and a cutting blade 12, wherein the cutting blade 12 is arranged in the tool groove 112 and has a cutting portion located above the tool groove, and the cutting blade 12 can move along the central axis of the tool groove 112 and is configured to rotate around its own central axis while moving along the central axis.

[0061] It should be noted that the staple cartridge includes at least two rows of staples 113, and the at least two rows of staples 113 are spaced apart along the lateral direction of the staple cartridge 111. When there are two rows of staples 113, the cutting groove 112 is located between the two rows of staples 113. When there are more than two rows of staples 113, the cutting groove 112 can be located between any two adjacent rows of staples 113.

[0062] It should be emphasized that, in the present invention, the central axis direction of the tool groove 112 is also the extension direction or the direction of the tool groove 112 .

[0063] In the above arrangement, the cutting blade 12 moves along the central axis of the cutting groove 112 on the one hand to cut the tissue to be cut; on the other hand, the cutting blade 12 continuously rotates around its central axis while moving along the central axis, thereby constantly changing the cutting surface for cutting the tissue to be cut. Such an arrangement can effectively extend the life of the cutting blade, thereby increasing the service life of the entire stapler and reducing the consumption cost of the stapler.

[0064] Further, refer to Figure 2 and Figure 5 As shown, the cutting blade 12 is specially designed as a circular blade. This design enables the blade to distribute the cutting force more evenly when rotating, thereby improving the cutting efficiency.

[0065] The circular blade is provided with a mounting shaft 121 along its central axis, and the setting direction of the mounting shaft 121 is perpendicular to the central axis of the tool groove 112. Such a structural arrangement enables the cutting blade 12 to move stably along the central axis in the tool groove 112 and rotate smoothly around its own central axis while moving.

[0066] This design not only ensures the continuity and stability of the cutting action, but also helps to extend the service life of the cutting blade.

[0067] It should be noted that, generally, the circular blade is detachably connected to the mounting shaft 121, thereby facilitating replacement of the circular blade. After the circular blade is mounted on the mounting shaft 121, the circular blade and the mounting shaft 121 remain relatively stationary, so that the mounting shaft 121 provides a pivoting force to the circular blade.

[0068] Further references Figure 2 and Figure 5 As shown, the core structure of the magazine assembly 1 includes a staple cartridge body 11 , which is responsible for carrying a staple cartridge 111 and related cutting components.

[0069] Furthermore, the end execution unit 10 is also equipped with a magazine base 4. This design enables the nail magazine body 11 to be detachably connected to the magazine base 4 through a support member, making it easy for the nail magazine body 11 to be quickly installed on the magazine base 4, thereby facilitating the replacement and maintenance of the magazine assembly 1.

[0070] The stapler 111, a key component, is formed directly on the stapler body 11, ensuring a compact and stable structure. Notably, the cutting groove 112 not only runs through the stapler body 11, but its bottom wall is also cleverly formed on the cartridge base 4. This design not only ensures the structural strength of the cutting groove 112 but also facilitates the stable movement and cutting operation of the cutting blade 12 within it. This structural arrangement fully demonstrates the ingenuity and practicality of the mechanical design, providing a reliable guarantee for the effective operation of the stapler.

[0071] Furthermore, the design of the end execution unit 10 also includes an anvil 2. The anvil 2 is pivotally connected to the bin base 4, and this design allows the anvil 2 to move flexibly relative to the bin base 4.

[0072] Specifically, in actual application, one end of the anvil 2 is pivotally connected to one end of the magazine base 4, and relative movement can be performed between the anvil 2 and the magazine base 4. Through their relative movement, the anvil 2 and the magazine base 4 can be closed or opened. Such an action not only helps to control the position of the nails in the nail magazine 111, but also ensures the accurate placement and effective fixation of the nails during the anastomosis process. Through the flexible cooperation between the anvil 2 and the magazine base 4, the end execution unit 10 can achieve more precise and reliable anastomosis operations, thereby meeting different surgical needs.

[0073] Further, return to Figure 4As best shown in the figure, the design of the magazine assembly 1 also cleverly incorporates a transmission member 13 to achieve a more sophisticated mechanical transmission effect. The transmission member 13 is mainly composed of a gear 131 and a linear rack 132. This design is designed to ensure that when the gear 131 meshes with the linear rack 132, the gear 131 can not only complete linear motion but also rotate.

[0074] In this embodiment, when the anvil 2 is tightly closed to the magazine base 4, the linear rack 132 is carefully arranged on the bottom wall of the tool groove 112 or the anvil 2, and its extension direction remains parallel to the central axis of the tool groove 112.

[0075] At the same time, gear 131 is coaxially arranged with the circular blade and securely mounted on mounting shaft 121. Once mounted on mounting shaft 121, gear 131 remains relatively stationary relative to mounting shaft 121. This ingenious arrangement allows gear 131 to move along the extension direction of the linear guide rail 132, i.e., along the central axis, when tightly meshed with linear rack 132. It will be appreciated that mounting shaft 121, connected to gear 131, also moves along the central axis, thereby driving the circular blade mounted on mounting shaft 121 to move along the extension direction of linear guide rail 132, i.e., along the central axis of tool path 112.

[0076] When the gear 131 is tightly meshed with the linear rack 132, the gear 131 can also pivot, driving the mounting shaft 121 connected thereto to rotate, thereby driving the circular blade mounted on the mounting shaft 121 to smoothly pivot along the central axis of the circular blade. This design not only ensures the consistency and accuracy of the cutting action, but also greatly improves the overall transmission efficiency and stability of the magazine assembly 1.

[0077] Furthermore, the design of the staple cartridge 111 cleverly arranges the staples 113 to ensure their effective use during surgery. To ensure precise activation of the staples 113 and coordinated movement of the circular blade, the magazine assembly 1 also features a specially designed staple-pushing slider 15. This slider 15 is meticulously positioned within the cutting groove 112 and is capable of stable movement along the central axis of the cutting groove 112. Simultaneously, a mounting shaft 121 is cleverly mounted on the slider 15 and is capable of pivoting relative to it. This design ensures that the slider 15 not only accurately activates the staples 113 during movement but also drives the mounting shaft 121 to pivot relative to the slider 15. This, in turn, drives the circular blade mounted on the mounting shaft 121 to move along its central axis and simultaneously pivots about its central axis, achieving precise coordination and efficient execution of the suturing and cutting actions. It is understood that during this process, the gear 131, mounting shaft 121, and circular blade remain relatively stationary while rotating synchronously.

[0078] Further, refer to Figure 5 As best shown, the staple cartridge body 11 is designed with a distinct proximal end 114 and distal end 115, defined along the central axis. The proximal end is typically located at the operating end, while the distal end is located further away from the operating end. The circular blade is carefully constructed to effectively cut tissue as it moves within the cutting groove 112 toward the distal end 115.

[0079] In order to realize the cooperative work between the circular blade and the nail pushing slider 15, the nail pushing slider 15 is specially provided with a recessed portion 1511 on one side facing the distal end 115. This design enables the circular blade to be positioned exactly in the recessed portion 1511 when in motion.

[0080] Specifically, the circular blade has a cutting surface located in the recessed portion 1511 and facing the distal end.

[0081] With this arrangement, when the staple-pushing slider 15 moves toward the distal end 115, it can reach a position closer to the distal end 115 before the circular blade, that is, the staple-pushing slider 15 can first trigger the staples 113 in the staple cartridge 111, causing the staples 113 to suture the tissue to be cut first. Only then will the circular blade pass through and cut the already sutured tissue to be cut.

[0082] It is understandable that after such arrangement, the knife holder for installing the circular blade can be omitted, so that the circular blade can be directly installed on the nail-pushing slider 15. The manufacturing cost of the utensil is saved.

[0083] In addition, the recessed portion 1511 can limit the position of the tissue to be cut. When the tissue to be cut is located in the recessed portion 1511, the circular blade is less likely to cause the tissue to be cut to deviate during cutting.

[0084] Furthermore, when the circular blade rotates toward the distal end 115, the lower side of the circular blade rotates toward the distal end 115, and is coupled to the Figure 8a As best shown, when the circular blade is pushed to the left, it will move clockwise. This setting can better bite the tissue to be cut, making the elastic modulus of the tissue to be cut smaller, making it easier to cut.

[0085] Next reference Figure 6 As shown, the staple pusher slider 15 includes a blade mounting portion 151 for mounting a circular blade and a staple triggering portion 152 for triggering the staples. The two are generally integrally formed, and the recessed portion 1511 is formed on the blade mounting portion 151. The staple triggering portion 152 is generally further provided with a positioning groove 1521 for receiving the pusher head 32 therein, thereby limiting the position of the pusher head 32 when driving the pusher slider 15.

[0086] Still refer to Figure 5 As shown, the design of the end execution unit 10 also includes an important drive assembly 3. This drive assembly 3 is specially configured to abut against the nail pushing slider 15, and its main function is to drive the nail pushing slider 15 to move toward the distal end 115. When a cutting or stapling operation needs to be performed, the drive assembly 3 will abut against the nail pushing slider 15 to provide the necessary power. After the operation is completed, the drive assembly 3 can be separated from the nail pushing slider 15 to perform the next operation or maintenance. This design ensures the flexibility of operation and the reliability of the mechanical structure, and also facilitates the disassembly of the magazine assembly 1.

[0087] Furthermore, the design of the driving assembly 3 mainly includes two key parts: a push rod 31 and a push head 32, wherein the push head 32 is connected to one end of the push rod 31. In this embodiment, preferably, the push rod 31 and the push head 32 are fixedly connected by welding or by interference fit to ensure stability between the two.

[0088] The push rod 31, as a transmission component of the driving force, has sufficient strength and stability to ensure the smooth progress of the driving process. The push head 32 is connected to one end of the push rod 31. This design ensures the firmness of the connection and facilitates the transmission of force between the two.

[0089] The primary function of the pusher head 32 is to abut against the pusher slider 15, thereby driving it toward the distal end 115. Once the operation is complete, the pusher head 32 can be separated from the pusher slider 15 to facilitate the next operation or necessary maintenance. The pusher slider 15 is typically provided with a positioning slot 1521. When the pusher head 32 abuts against the pusher slider 15 to drive it toward the distal end 115, it fits within the positioning slot 1521, preventing deviation in the direction of force application.

[0090] It should be noted that the reference Figure 5 As shown, the push head 32 has two side walls arranged back to back, and the two side walls are spaced apart in a direction perpendicular to the axial direction of the linear tool groove. The two side walls are symmetrically provided with a first boss 321 and a second boss 322, respectively. The first boss 321 and the second boss 322 are spaced apart in the vertical direction, and a limiting groove is provided on the pin seat 2. The first boss 321 can be limited in the limiting groove, and the second boss 322 can be limited in the linear tool groove 112. The first boss 321 and the second boss 322 can both move in a direction parallel to the axial direction of the linear tool groove 112.

[0091] It can be understood that in this embodiment, the first boss 321 is located above the second boss 322. The first boss 321 cooperates with the nail seat 2 to limit the position, and the second boss 322 cooperates with the linear limiting groove 112 to limit the position, so that when the nail seat 2 and the nail magazine body are closed, the positions of the two in the vertical direction are relatively fixed, so that the tissue to be cut can be effectively clamped.

[0092] The following combination Figures 7a-7b , focusing on the process of installing the magazine assembly 1 on the magazine base 4, Figure 7a In the embodiment, the nail magazine body 11 is installed on the magazine base 4 and moves toward the pivot connection portion between the nail support 2 and the magazine base 4.

[0093] refer to Figure 7b When the push head 32 is inserted into the positioning groove 1521, it indicates that the magazine assembly 1 has been assembled in place.

[0094] The present invention also provides a stapler, which includes the end execution unit 10 as described above. Figures 8a-8b The focus is on explaining the process of pushing and retracting the stapler.

[0095] refer to Figure 8a As shown, the figure shows the process of the cutting blade 12 of the stapler being pushed toward the distal end 115 of the staple magazine body 11. In the present invention, this process is defined as a pusher. During this process, the pusher head 32 is inserted into the positioning groove 1521 on the staple pusher slider 15 to push the pusher slider 15 to move.

[0096] Next reference Figure 8b As shown in the figure, after the cutting blade 12 has cut the tissue to be cut, the push rod 31 is driven to move away from the stapler pusher slider 15, thereby driving the pusher head 32 to move away from the pusher slider 15. As can be seen, the pusher head 32 withdraws from the positioning groove 1521, and the drive assembly 3 is finally returned to the interior of the stapler body and completely separated from the magazine assembly 1. In this state, the magazine assembly 1 can be quickly replaced. This arrangement improves the flexibility of the entire stapler.

[0097] In summary, the embodiments of the present invention achieve the following technical effects:

[0098] 1) The cutting blade 12 moves along the central axis of the cutting groove 112 to cut the tissue to be cut. Furthermore, the cutting blade 12 continuously rotates around its central axis while moving along the central axis, thereby continuously changing the cutting surface for cutting the tissue to be cut. This arrangement can effectively extend the life of the cutting blade, thereby increasing the service life of the entire stapler and reducing the consumption cost of the stapler.

[0099] 2) The cutting blade 12 can be directly mounted on the nail-pushing slider 15, thereby omitting the blade mounting frame and saving the manufacturing cost of the device;

[0100] 3) The magazine assembly 1 can be quickly disassembled and installed, which improves operating efficiency and reduces the maintenance cost of the stapler.

[0101] Obviously, the embodiments described above are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0102] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, tasks, devices, components and / or combinations thereof.

[0103] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0104] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An end effector unit for a stapler, comprising a magazine assembly, wherein the magazine assembly comprises a staple magazine, a linear feed groove provided on the staple magazine, and a cutting blade, wherein: The cutting blade is arranged in the tool groove and has a cutting portion located above the tool groove. The cutting blade can move along the central axis of the tool groove and is configured to rotate around its own central axis while moving along the central axis.

2. The end effector unit according to claim 1, characterized in that: The cutting blade is configured as a circular blade. A mounting shaft is provided along the central axis of the circular blade. The mounting shaft is configured in a direction perpendicular to the central axis.

3. The end effector unit according to claim 2, characterized in that: The magazine assembly includes a nail magazine body, and the end execution unit includes a magazine base. The nail magazine body is detachably mounted and retained on the magazine base through a support member. The nail magazine is formed on the nail magazine body, and the tool groove passes through the nail magazine body and the bottom wall of the tool groove is formed on the magazine base.

4. The end effector unit according to claim 3, characterized in that: It also includes a pin seat, which is pivotally connected to the magazine base and can move relative to it to close or open.

5. The end effector unit according to claim 4, characterized in that: The magazine assembly also includes a transmission component, which includes a gear and a linear rack. When the anvil and the magazine base are closed, the linear rack is arranged on the bottom wall of the tool groove or the anvil in a direction parallel to the central axis. The gear is coaxial with the circular blade and is sleeved on the mounting shaft. The gear can be engaged with the linear rack to drive the circular blade to move along the central axis and pivot around the central axis.

6. The end effector unit according to claim 5, characterized in that: The staple cartridge is provided with suture staples, and the cartridge assembly includes a staple pushing slider. The mounting shaft is provided on the staple pushing slider and can pivot relative to the staple pushing slider. The staple pushing slider is provided in the cutting groove and can move along the central axis to trigger the suture staples, and drive the circular blade to move along the central axis and pivot around the central axis.

7. The end effector unit according to claim 6, characterized in that: The nail magazine body has a proximal end and a distal end in the direction of the central axis. The circular blade is configured to be used for cutting the tissue to be cut when it moves toward the distal end in the tool groove. A recess is provided on the side of the nail-pushing slider facing the distal end. The circular blade has a cutting surface located in the recess and facing the distal end. When the circular blade rotates toward the distal end, the lower side of the circular blade rotates toward the distal end.

8. The end effector unit according to claim 7, characterized in that: The end execution unit further includes a driving assembly, which is used to abut against the nail pushing slider to drive the nail pushing slider to move toward the distal end or separate from the nail pushing slider.

9. The end effector unit according to claim 8, characterized in that: The driving assembly includes a push rod and a push head connected to one end of the push rod, the push head is used to abut or separate from the push pin slider, the push head has two side walls arranged back to back, the two side walls are spaced apart in a direction perpendicular to the axial direction of the linear tool groove, and the two side walls are symmetrically provided with a first boss and a second boss, respectively, the first boss and the second boss are spaced apart in the vertical direction, and a limiting groove is provided on the pin seat, the first boss can be limited in the limiting groove, the second boss can be limited in the linear tool groove, and the first boss and the second boss can both move in a direction parallel to the axial direction of the linear tool groove.

10. A stapler, characterized in that: Comprising the end execution unit according to any one of claims 1-9.

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