Nail anvil assembly and anastomat

Abstract

The invention relates to the field of medical instruments, in particular to a nail anvil assembly and an anastomat, the nail anvil assembly drives a nail anvil piece to be switched between an unfolded state and a folded state through rotation of a rotating body, the nail anvil piece is kept in the compact folded state before the nail anvil piece enters a human body suturing area, the area of an insertion opening is reduced, and the nail anvil piece is more compact. The nail anvil assembly can enter an operation area conveniently, when the nail anvil assembly reaches a suturing position, the nail anvil piece is unfolded rapidly, and accurate execution of the anastomosis function is ensured. Besides, after suturing is completed, the nail anvil piece can be converted into the folded state again, the radial size is decreased again, the contact area between the nail anvil assembly and the suturing face is minimized when the nail anvil assembly is withdrawn, friction force is reduced accordingly, and the situation that the suturing face is pulled accidentally due to the nail anvil assembly and displacement of peripheral tissue is caused is effectively avoided. Therefore, the stability of the anastomosis effect and the surgical fineness are ensured, and the postoperative recovery process of a patient is accelerated.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and more specifically, to an anvil assembly and a stapler. Background Art

[0002] In surgical operations, as an important medical device, a stapler is widely used in the connection and repair of various tissues, especially in the reconstruction of tissues such as the digestive tract and blood vessels. Traditional stapler designs often adopt fixed anvil assemblies, whose sizes and shapes cannot be adjusted during the surgical process, which to a certain extent limits the scope of application and flexibility of the stapler.

[0003] Specifically, when the stapler needs to enter a narrow or complex anatomical area, the fixed anvil assembly may have excessive friction with the surrounding tissues due to its large size, resulting in complex insertion operations of the anvil assembly. In addition, after suturing, due to the tight connection of the staples, the tissues at this part (i.e., the suture surface) are folded, and thus the inner diameter of this part is significantly smaller than that of the healthy tissue side. Since the anvil assembly design is usually slightly smaller than the inner diameter of the normal intestine or esophagus, when the anvil assembly is removed, when the anvil assembly passes through the area where the inner diameter shrinks after suturing, the side edges of the anvil pieces will inevitably rub and slightly scratch the fragile tissues at the suture, and this process may affect and disturb the tissues at the suture, resulting in the tissues at the suture being pulled or damaged, thereby affecting the anastomosis effect and the postoperative recovery of the patient. Summary of the Invention

[0004] The purpose of the present invention is to provide an anvil assembly that can improve the surgical effect.

[0005] To achieve the above purpose, the present invention provides the following technical solution: An anvil assembly, comprising:

[0006] An anvil rod assembly;

[0007] A plurality of anvil pieces are arranged on the anvil rod assembly, and nail pits are formed on the anvil pieces, and the plane where the nail pits are located is perpendicular to the central axis of the anvil rod assembly; the plurality of anvil pieces can move relative to each other to form an unfolded state and a folded state, and

[0008] A rotating body is arranged between the anvil rod assembly and the anvil pieces, and the rotating body rotates to drive the plurality of anvil pieces to move relative to each other to realize the conversion of the anvil pieces between the unfolded state and the folded state.

[0009] Further, a sliding structure is formed between the rotating body and the anvil piece. The sliding structure includes a sliding groove and a sliding block disposed in the sliding groove and movable within the sliding groove. The sliding groove is formed on one of the rotating body and the anvil piece, and the sliding block is disposed on the other of the rotating body and the anvil piece. At least a part of the sliding groove extends along the radial direction of the anvil assembly.

[0010] Further, the sliding groove includes a first sliding section extending along the radial direction and a second sliding section extending along the circumferential direction. The second sliding section is formed by bending and extending from the outer end side of the first sliding section.

[0011] Further, a plurality of the anvil pieces include a first anvil piece and a second anvil piece. The first anvil piece and the second anvil piece are arranged at intervals. In the folded state, the first anvil piece is located inside the second anvil piece.

[0012] Further, the first anvil piece has a first pit portion for forming a staple pit, and the second anvil piece has a second pit portion for forming a staple pit. In the deployed state, the first pit portion and the second pit portion are located on the same circumference.

[0013] Further, the first anvil piece has a first pit portion for forming a staple pit, and the second anvil piece has a second pit portion for forming a staple pit. The plane where the first pit portion is located overlaps with the plane where the second pit portion is located.

[0014] Further, the rotating body includes a first rotating body for driving the first anvil piece to rotate and a second rotating body for driving the second anvil piece to rotate.

[0015] Further, the sliding groove has an arc section extending along the radial direction. When converting from the folded state to the deployed state, the bending direction of the arc section on the first rotating body is opposite to the bending direction of the arc section on the second rotating body.

[0016] Further, the anvil rod assembly includes a positioning member and a driving rod sleeved in the positioning member. The driving rod drives the rotating body to rotate. The positioning member includes a sleeve rod sleeved outside the driving rod and a positioning disk disposed on the sleeve rod. An accommodation cavity for at least partially accommodating the rotating body is formed in the positioning disk. A limiting structure is formed between the positioning disk and the anvil piece, and the limiting structure limits the anvil piece to move along the radial direction of the positioning disk.

[0017] The present application also provides a stapler, including a stapler body and the above anvil assembly disposed on the stapler body.

[0018] The beneficial effects of the present invention are as follows: The anvil assembly of the present application drives the anvil blade to switch between the deployed state and the folded state through the rotation of the rotating body. Before entering the human body suture area, the anvil blade remains in a compact folded state, reducing the insertion area and greatly facilitating the entry of the anvil assembly into the surgical area. When reaching the suture position, the anvil blade quickly unfolds to ensure the accurate execution of the anastomosis function. In addition, after suturing, the anvil blade can be converted back to the folded state again, and the radial dimension becomes smaller again, minimizing the contact area between the anvil assembly and the suture surface during withdrawal, reducing the friction force, effectively avoiding accidental pulling of the suture surface due to the anvil assembly and displacement of the surrounding tissues, thus ensuring the stability of the anastomosis effect and the fineness of the surgery, and accelerating the postoperative recovery process of the patient.

[0019] The above description is only an overview of the technical solution of the present invention. In order to understand the technical means of the present invention more clearly and implement it according to the content of the specification, the following describes in detail with reference to the preferred embodiments of the present invention and the accompanying drawings. Brief Description of the Drawings

[0020] Figure 1 It is a partial structural schematic diagram of a stapler shown in an embodiment of the present application, and the anvil assembly is in the deployed state;

[0021] Figure 2 is Figure 1 a partial structural schematic diagram in;

[0022] Figure 3 is Figure 2 an exploded view of the structure shown in;

[0023] Figure 4 is Figure 3 a structural schematic diagram of the positioning member in another direction in;

[0024] Figure 5 It is a structural schematic diagram of the anvil assembly of the present application in the folded state. Detailed Description of the Preferred Embodiments

[0025] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0026] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0029] Please refer to Figure 1 , the tubular stapler mainly includes a stapler body and an anvil assembly 100 provided on the stapler body. The stapler body generally includes a handle (not shown), a cartridge barrel 200 provided on the handle, a rod assembly (not shown) provided in the handle, a cartridge assembly (not shown) provided in the cartridge barrel 200, and a circular cutting knife (not shown). The rod assembly includes a closing rod and a firing rod. The closing rod is connected to the anvil assembly 100 to realize the relative movement of the anvil assembly 100 with respect to the cartridge assembly to complete the closing. The firing rod is used to drive the cartridge assembly and the circular cutting knife to move, so as to realize the firing of the staples in the cartridge assembly and the firing of the cutting knife. In one embodiment, the anvil assembly 100 and the stapler body are of an integral structure, that is, the anvil assembly 100 is directly fixed on the stapler body, and the anvil assembly 100 is directly connected to the closing rod. By setting the anvil assembly 100 and the stapler body as an integral structure, it is possible to avoid the insertion of the stapler body and the anvil assembly 100 in the patient's body, which helps to improve the efficiency of the operation. In another embodiment, the anvil assembly 100 and the stapler body can also be of a split structure, that is, the anvil assembly 100 and the closing rod are docked through a plug-in structure. After the two are docked, the closing rod is connected to a driving rod (described later) in the anvil assembly 100 to realize driving the closing rod to rotate to realize the anvil assembly 100 in the unfolded state ( Figure 1 the state shown) and the closed state ( Figure 5The tubular stapler is switched between the states shown in the figure, and the closing rod is driven to move along the axial direction of the staple cartridge cylinder 200 to achieve the closing of the tubular stapler.

[0030] See also Figure 1 The anvil assembly 100 for the above-mentioned tubular stapler is shown in an embodiment of the present application. For the convenience of description, the bottom-to-top direction described below refers to the anvil assembly 100 being in the Figure 1 The direction of the state, but not the direction of actual use, Figure 1 In the figure, the direction indicated by arrow a1 is upward, and the direction indicated by arrow a2 is downward.

[0031] Please see Figures 1 to 4 The anvil assembly 100 includes an anvil rod assembly 10, a plurality of anvil plates 20 disposed on the anvil rod assembly 10, and a rotating body 30 disposed between the anvil rod assembly 10 and the anvil plates 20. A plurality of nail pits (not shown) are formed on each anvil plate 20, and the plane where the nail pits are located is perpendicular to the central axis of the anvil rod assembly 10. The plurality of anvil plates 20 can move relative to each other to form an expanded state and a folded state. In this embodiment, the plurality of anvil plates move relative to the horizontal position, that is, they change between the expanded state and the folded state in the horizontal direction. In this embodiment, a plurality of anvil plates 20 are combined to form the anvil head of the anvil assembly 100. The anvil plates 20 are roughly sheet-shaped. The plurality of anvil plates 20 are arranged circumferentially to form a closed annular structure. Of course, in other embodiments, the plurality of anvil plates 20 can also be arranged circumferentially to form a closed circular structure. It should be noted that the closed annular structure or the closed circular structure is formed by splicing a plurality of anvil pieces 20, the gaps between adjacent anvil pieces 20 are negligible, and the closed annular structure or the closed circular structure is the structure presented when the anvil pieces 20 are in the unfolded state. The plurality of anvil pieces 20 are driven to move relative to each other by the rotation of the rotating body 30 to realize the conversion of the anvil pieces 20 between the unfolded state and the folded state.

[0032] The anvil assembly 100 drives the anvil piece 20 to switch between the unfolded state and the folded state through the rotation of the rotating body 30. Before entering the suture area of the human body, the anvil piece 20 maintains a compact folded state, reducing the insertion port area, greatly facilitating the anvil assembly 100 to enter the surgical area. When reaching the suture position, the anvil piece 20 quickly unfolds to ensure the precise execution of the anastomosis function. In addition, after the suture is completed, the anvil piece 20 can be converted to a folded state again, and the radial dimension becomes smaller again, so that the contact area between the anvil assembly 100 and the suture surface is minimized when withdrawing, and the friction force is reduced accordingly, effectively avoiding the suture surface from being accidentally pulled by the anvil assembly and causing displacement of the surrounding tissue, thereby ensuring the stability of the anastomosis effect and the precision of the operation, and accelerating the patient's postoperative recovery process.

[0033] Furthermore, since the plurality of anvil pieces 20 are driven to move horizontally by the rotating body 30 to achieve deployment, and the moving direction is perpendicular to the firing direction when the staples are fired, compared with the implementation structure in which the anvil pieces change between the deployed state and the folded state along the axial direction, the strength and stability of the anvil head in this embodiment are better.

[0034] It should be noted that in this embodiment, since the anvil assembly 100 can be placed into the surgical area in the folded state, it can be placed into the surgical area after the surgical area is transected and a purse-string suture is made. The anvil assembly 100 is conducive to the application of an integral structure between the anvil assembly and the stapler body.

[0035] In this embodiment, a sliding structure is formed between the rotating body 30 and the anvil piece 20. The sliding structure includes a sliding groove 41 and a sliding block 42 disposed in the sliding groove 41 and movable within the sliding groove 41. The sliding groove 41 is formed on the rotating body 30, and the sliding block 42 is disposed on the anvil piece 20. In other embodiments, the sliding groove can also be provided on the anvil piece, and the sliding block can be provided on the rotating body. At least a part of the sliding groove 41 extends along the radial direction of the anvil assembly 100. In this embodiment, a part of the sliding groove 41 extends along the radial direction. Specifically, the sliding groove 41 can include a first sliding segment 411 extending along the radial direction and a second sliding segment 412 extending along the circumferential direction. The second sliding segment 412 is bent and extended from the outer end side of the first sliding segment 411. In an alternative embodiment, the first sliding segment 411 is an arc segment 411, and the second sliding segment 412 is a horizontal segment bent and extended from the outer end side of the arc segment 411. By providing the horizontal segment, it is avoided that after the anvil piece 20 is in the deployed state, the anvil piece 20 slides radially due to the tissue around the anvil piece 20 pressing on the anvil piece 20, so that the anvil piece 20 can be maintained in this position, which is conducive to the closure of the staples. In other embodiments, the sliding groove 41 can also be entirely the first sliding segment 411. By adopting the cooperation mode of the sliding groove 41 and the sliding block 42, the overall structure is simpler, and the stability of the anvil piece 20 during movement is ensured, enabling it to move along the established direction.

[0036] The plurality of anvil plates 20 may or may not have the same structure. In one embodiment, the plurality of anvil plates 20 includes a first anvil plate 21 and a second anvil plate 22, and the first anvil plate 21 and the second anvil plate 22 are arranged at intervals. Among them, the structures and / or sizes of the first anvil plate 21 and the second anvil plate 22 are different. By arranging the first anvil plate 21 and the second anvil plate 22 with different structures and / or sizes at intervals, the design flexibility of the anvil assembly 100 can be improved, and it is also convenient to form a closed annular structure for the anvil head. The first anvil plate 21 has a first pit portion 211 for forming a staple pit, and the second anvil plate 22 has a second pit portion 221 for forming a staple pit. In the unfolded state, a plurality of first pit portions 211 and a plurality of second pit portions 221 are all located on the same circumference. In this way, the suturing effect can be improved. In this embodiment, the regions of the first anvil plate 21 and the second anvil plate 22 near the outer side edges are formed as the first pit portion 211 and the second pit portion 221. Also, in order to improve the closing effect of the staples, the plane where the first pit portion 211 is located overlaps with the plane where the second pit portion 221 is located.

[0037] In this embodiment, in the folded state, the first anvil plate 21 is located inside the second anvil plate 22. Specifically, the size of the first anvil plate 21 is smaller than that of the second anvil plate 22. In the folded state, axially, the first anvil plate 21 is stacked below the second anvil plate 22, and axially, the first anvil plate 21 is located inside the second pit portion 221. Such a structure helps to reduce the radial size of the anvil assembly 100.

[0038] As described above, the first anvil plate 21 and the second anvil plate 22 move radially driven by the rotating body 30. In actual design, the first anvil plate 21 and the second anvil plate 22 can be controlled by one rotating body 30, or can be driven by two different rotating bodies 30. When driven by two rotating bodies 30 to move, the two rotating bodies 30 can rotate in one direction or in different directions. In this embodiment, the rotating body 30 includes a first rotating body 31 for driving the first anvil plate 21 to rotate and a second rotating body 32 for driving the second anvil plate 22 to rotate. Among them, when converting from the folded state to the unfolded state, the bending direction of the arc segment 411 on the first rotating body 31 is opposite to the bending direction of the arc segment 411 of the second rotating body 32. In this way, the two rotating bodies 30 can rotate simultaneously, and then drive the first anvil plate 21 and the second anvil plate 22 to move radially at the same time. By respectively providing the first rotating body 31 for driving the first anvil plate 21 to rotate and the second rotating body 32 for driving the second anvil plate 22 to rotate, the control precision and flexibility of the anvil assembly 100 are improved. And by setting the bending direction of the arc segment 411 on the first rotating body 31 to be opposite to the bending direction of the arc segment 411 of the second rotating body 32, it helps to simplify the control of the stapler.

[0039] In this embodiment, it is set that the first rotating body 31 rotates counterclockwise and the second rotating body 32 rotates clockwise. Both the first rotating body 31 and the second rotating body 32 are in the structure of a four-corner boomerang. The sliding groove 41 is arranged on the blade 301 of the first rotating body 31 and the second rotating body 32, and is arranged close to the edge of the blade 301. Specifically, it is arranged along the outer contour of the blade 301.

[0040] As described above, the anvil rod assembly 10 drives the rotating body 30 to rotate. Specifically, the anvil rod assembly 10 includes a positioning member 11 and a driving rod 12 sleeved in the positioning member 11. The driving rod 12 rotates to drive the rotating body 30 to rotate. When the driving rod 12 rotates, the positioning member 11 does not rotate. In this way, when the driving member rotates, the driving rod 12 can be prevented from agitating the tissue placed in the staple cartridge cylinder 200. The positioning member 11 includes a sleeve rod 111 sleeving the driving rod 12 and a positioning disk 112 arranged on the sleeve rod 111. An accommodating cavity for at least partially accommodating the rotating body 30 is formed in the positioning disk 112. In this embodiment, the first rotating body 31 and the second rotating body 32 are respectively located on the upper and lower sides of the positioning disk 112. Specifically, the positioning disk 112 has a first surface and a second surface arranged oppositely. A first accommodating cavity 131 and a second accommodating cavity 132 are respectively recessed on the first surface and the second surface. The first rotating body 31 is arranged in the first accommodating cavity 131, and the second rotating body 32 is arranged in the second accommodating cavity 132. In order to prevent the first rotating body 31 from falling off, a limiting rod 14 is arranged below the first surface. The limiting rod 14 is located below the first rotating body 31 to limit the first rotating body 31 from falling off. The top of the driving rod 12 protrudes from the top end of the sleeve rod 111 (this top end is the end of the sleeve rod 111 close to the anvil piece 20). A flange 121 and a convex block 122 protrude radially outward on the end surface of the top. In the radial direction, the outer diameter of the flange 121 is larger than the thickness of the convex block 122. The flange 121 presses against the upper side of the second rotating body 32 to limit the second rotating body 32 from detaching. The positioning disk 112, the first rotating body 31, and the second rotating body 32 are respectively provided with through holes 113, a first limiting hole 311, and a second limiting hole 321 for the driving rod 12 to pass through. The size of the through hole 113 is slightly larger than the sum of the diameter of the driving rod 12 and the thickness of the convex block 122. Both the first limiting hole 311 and the second limiting hole 321 have a round hole (not labeled) matching the driving rod 12 and a groove (not labeled) matching the convex block 122. The cooperation between the convex block 122 and the first limiting hole 311 and the second limiting hole 321 enables the driving rod 12 to drive the first rotating body 31 and the second rotating body 32 to rotate.

[0041] In order to make the anvil piece 20 move stably, a limiting structure is formed between the positioning disc 112 and the anvil piece 20, and the limiting structure restricts the anvil piece 20 from moving radially along the positioning disc 112. Specifically, a first ring portion 114 and a second ring portion 115 are respectively formed on the first surface and the second surface of the positioning disc 112. The first ring portion 114 and the second ring portion 115 are the side walls of the first accommodating cavity 131 and the second accommodating cavity 132. A first airfoil groove 116 and a second airfoil groove 117 are respectively formed on the first ring portion 114 and the second ring portion 115. A first airfoil strip 212 is formed on the first anvil piece 21, and a second airfoil strip 222 is formed on the second anvil piece 22. The first airfoil strip 212 and the second airfoil strip 222 extend in the radial direction. The first airfoil strip 212 is stuck in the first airfoil groove 116, and the second airfoil strip 222 is stuck in the second airfoil groove 117. The combination of the first airfoil strip 212 and the first airfoil groove 116, and the second airfoil strip 222 and the second airfoil groove 117 forms the limiting structure. The sliding blocks of the first anvil piece 21 and the second anvil piece 22 are respectively formed on the first airfoil strip 212 and the second airfoil strip 222. One end of the limiting rod 14 is fixed on the first ring portion 114, and the other end is fixed on the sleeve rod 111. The sleeve rod 111 is not in direct contact with the positioning disc 112, and the limiting rod 14 is fixed between the two.

[0042] The anvil assembly 100 further includes a fixing sleeve 40 sleeved outside the sleeve rod 111. Connecting rods 41 extending from both sides of the fixing sleeve 40 are fixed to the cartridge barrel 200. The driving rod 12 passes through the fixing sleeve 40. One end of the sleeve rod 111 far from the anvil piece 20 is located inside the fixing sleeve 40, and this end is defined as the bottom end. A spring is arranged between the fixing sleeve 40 and the bottom end of the sleeve rod 111, and the spring applies a holding force towards the anvil piece 20 to the sleeve rod 111. A structure for achieving axial limitation and circumferential relative rotation is formed between the sleeve rod 111 and the driving rod 12. For example, an annular groove is formed on the inner wall of the sleeve rod 111, and a limiting block is formed on the driving rod 12 and is embedded in the annular groove, and the limiting block can move along the annular groove. The driving rod 12 also passes through the spring and does not contact the spring.

[0043] It should be noted that in this embodiment, since the anvil assembly 100 and the stapler body are of an integral structure, the closing rod of the stapler body and the driving rod 12 of the anvil assembly 100 are a single rod. This driving rod 12 can achieve both rotational movement and axial movement. When the anvil assembly 100 and the stapler body are of a split structure, when the anvil assembly 100 is docked with the stapler body, the closing rod needs to be docked with the driving rod 12 or the sleeve rod 111. Among them, when the closing rod is docked with the driving rod 12, the driving rod 12 can achieve rotational movement and axial movement. The structure between the sleeve rod 111 and the driving rod 12 can adopt the aforementioned structure, and there is a structure that can achieve axial limit and circumferential relative rotation between the two. Thus, when the closing rod pulls the driving rod 12 to move axially, the sleeve rod 111 will also move axially at the same time; when the closing rod is docked with the sleeve rod 111, a rotating rod for docking with the driving rod 12 can be further provided within the rod assembly. This rotating rod is used to drive the driving rod 12 to rotate, and this rotating rod can also move axially together with the driving rod 12. Thus, when the anvil assembly 100 is combined, the rotating rod and the driving rod 12 respectively drive the driving rod 12 and the sleeve rod 111 to move axially at the same time.

[0044] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the various technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0045] The above-described embodiments merely represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the invention patent should be subject to the appended claims.

Claims

1. An anvil assembly, characterized in that, Comprising: An anvil rod assembly; A plurality of anvil plates provided on the anvil rod assembly, nail pits being formed on the anvil plates, a plane where the nail pits are located being perpendicular to the central axis of the anvil rod assembly; the plurality of anvil plates can move relative to each other to form an unfolded state and a folded state, and A rotating body provided between the anvil rod assembly and the anvil plates, the rotating body rotating to drive the plurality of anvil plates to move relative to each other so as to realize the conversion of the anvil plates between the unfolded state and the folded state.

2. The anvil assembly according to claim 1, wherein, A sliding structure is formed between the rotating body and the anvil plates, the sliding structure including a sliding groove and a sliding block provided in the sliding groove and movable in the sliding groove, the sliding groove being formed on one of the rotating body and the anvil plates, the sliding block being provided on the other of the rotating body and the anvil plates, and at least part of the sliding groove extending along the radial direction of the anvil assembly.

3. The anvil assembly according to claim 2, wherein, The sliding groove includes a first sliding section extending along the radial direction and a second sliding section extending along the circumferential direction, the second sliding section being bent and extended from the outer end side of the first sliding section.

4. The anvil assembly according to claim 2, wherein The plurality of anvil plates include a first anvil plate and a second anvil plate, the first anvil plate and the second anvil plate being arranged at intervals, and in the folded state, the first anvil plate is located inside the second anvil plate.

5. The anvil assembly according to claim 4, wherein, The first anvil plate has a first nail pit portion for forming a nail pit, the second anvil plate has a second nail pit portion for forming a nail pit, and in the unfolded state, the first nail pit portion and the second nail pit portion are located on the same circumference.

6. The anvil assembly according to any one of claims 4 to 5, characterized in that, The first anvil plate has a first nail pit portion for forming a nail pit, the second anvil plate has a second nail pit portion for forming a nail pit, and a plane where the first nail pit portion is located overlaps with a plane where the second nail pit portion is located.

7. The anvil assembly according to any one of claims 4 to 5, characterized in that, The rotating body includes a first rotating body for driving the first anvil plate to rotate and a second rotating body for driving the second anvil plate to rotate.

8. The anvil assembly according to claim 7, wherein, The sliding groove has an arc section extending along the radial direction, and when converting from the folded state to the unfolded state, a bending direction of the arc section on the first rotating body is opposite to a bending direction of the arc section on the second rotating body.

9. The anvil assembly according to claim 1, wherein, The anvil rod assembly includes a positioning member and a driving rod sleeved in the positioning member, the driving rod driving the rotating body to rotate, the positioning member including a sleeve rod sleeved outside the driving rod and a positioning disk provided on the sleeve rod, an accommodating cavity for at least partially accommodating the rotating body being formed in the positioning disk, and a limiting structure being formed between the positioning disk and the anvil plates, the limiting structure limiting the anvil plates to move along the radial direction of the positioning disk.

10. A stapler, characterized in that, Including a stapler body and an anvil assembly as described in any one of claims 1 to 9 provided on the stapler body.

Images