Rotating joint structure of arc-shaped anastomat

Abstract

The application provides a rotating joint structure of an arc anastomat, which comprises a rotating joint, an arc-shaped nail abutting seat and a nail box fixing seat, the rotating joint is formed into a cylindrical structure by butt joint of a male head and a female head, and the butt joint of the male head and the female head forms an L-shaped clamping groove structure; the arc-shaped nail abutting seat is provided with clamping pieces, the installation groove for the rotating joint is formed between the two clamping pieces, and the end portions of the two clamping pieces are formed into inwardly-bent transverse insertion pieces; the clamping groove structure of the rotating joint is aligned with the transverse insertion pieces, is inserted into the installation groove of the arc-shaped nail abutting seat from top to bottom, and the female head is located at the bottom of the arc-shaped nail abutting seat. The rotating joint structure of the arc anastomat provided by the application is designed as an asymmetric connection driving structure, one side of the rotating joint is driven to swing, and the rotating joint is connected with the arc-shaped nail abutting seat through the clamping groove structure, so that the rotating joint can maintain good structural strength when bearing a single-side torque.

Description

Technical Field

[0001] This invention relates to the field of interventional medical device technology, and in particular to a rotating joint structure of an arc-shaped anastomosis device. Background Technology

[0002] Commonly used laparoscopic staplers have a linear staple cartridge, such as the laparoscopic stapler disclosed in CN105596049B. In a linear stapler, the jaws can be adjusted by swinging left and right. The principle of this adjustment is that two symmetrical articulated push rods 290 drive two articulated connecting plates 105, which in turn drive the joints to swing the anvil. Since the jaws of the linear stapler and the drive rod of the stapler are coaxially arranged, the two articulated connecting plates can be used to construct a parallelogram-shaped linkage drive mechanism to achieve left and right swing adjustment of the jaws.

[0003] CN110755122B discloses a laparoscopic stapler, in which the staple cartridge and jaws adopt an arc-shaped structure. Unlike linear staple cartridges and jaws, the arc-shaped staple cartridge and jaws are not coaxially arranged with the drive rod. Therefore, during the left-right swinging drive, the torque on both sides is different, preventing the achievement of a linked assist function. This also means that the staple cartridges and jaws of existing arc-shaped laparoscopic staplers on the market cannot be directly designed based on the left-right swinging principle of linear laparoscopic staplers; therefore, arc-shaped laparoscopic staplers on the market cannot swing left and right.

[0004] However, in clinical practice, if the angle of the arc-shaped stapler cannot be adjusted left and right, it will be difficult to make adaptive adjustments in case of emergencies, potentially leading to surgical failure. In other words, designing an arc-shaped laparoscopic stapler with a jaw that can swing left and right would meet a variety of different clinical requirements and undoubtedly has a very strong market prospect. Summary of the Invention

[0005] The technical problem to be solved by the embodiments of the present invention is to provide a rotating joint structure for an arc-shaped stapler, thereby solving the problem that the front joint of the existing arc-shaped stapler cannot meet the torque requirements when swinging left and right.

[0006] In order to solve the above technical problems, the present invention provides a rotating joint structure of an arc-shaped stapler, including a rotating joint (1), an arc-shaped anvil seat (2) and a staple box fixing seat (3). The rotating joint (1) is formed by the docking of a male head (10) and a female head (20) to form a cylindrical structure. After the male head (10) and the female head (20) are docked, an L-shaped clamping groove structure is formed on both sides of the cylindrical structure. The ends of the arc-shaped anvil (2) are provided with clamping pieces (2b) bent upward from the bottom surface of the arc-shaped anvil (2). A mounting groove for mounting the rotating joint (1) is formed between the two clamping pieces (2b). A transverse insert (2a) bent inward is formed at the ends of the two clamping pieces (2b). The clamping groove structure of the rotating joint (1) is aligned with the transverse insert (2a) and inserted into the mounting groove of the arc-shaped anvil (2) from top to bottom, so that the female head (20) is located at the bottom of the arc-shaped anvil (2).

[0007] The male head (10) is integrally formed and includes a first rotating support (11) and a first semi-cylinder (12). The first rotating support (11) and the first semi-cylinder (12) are connected at one end away from the axis and are separated at the side near the axis to form a longitudinal clamping groove (121). The female head (20) is integrally formed and includes a second rotating support (21) and a second semi-cylinder (22). The second rotating support (21) and the second semi-cylinder (22) are connected in the middle and are separated on both sides to form a transverse clamping groove (221). When the male head (10) and the female head (20) are connected, the longitudinal clamping groove (121) and the transverse clamping groove (221) form a clamping groove structure that is directly connected. After the transverse insert (2a) of the arc-shaped anchor seat (2) is inserted into the clamping groove structure, it can be clamped by the transverse clamping groove (221) and the longitudinal clamping groove (121) at the same time.

[0008] The male head (10) has a stepped structure (121a) on the outer side corresponding to the longitudinal groove (121) to cooperate with the transverse insert (2a) of the arc-shaped anchor seat (2).

[0009] The first half-cylinder (12) is provided with a docking guide post (122) on its connecting surface, and the second half-cylinder (22) is provided with a docking guide hole (222) on its connecting surface. The first half-cylinder (12) and the second half-cylinder (22) are connected and positioned by the docking guide post (122) and the docking guide hole (222).

[0010] Both the male head (10) and the female head (20) have axial guide channels at the center of their mating surfaces to allow the nail box control mechanism to pass through.

[0011] The inner side of the first rotating support (11) is provided with a fan-shaped first guide opening (111), and the upper and lower sides of the first guide opening form a first upper guide arc surface (112) and a first lower guide arc surface (113). The inner side of the second rotating support (21) is provided with a fan-shaped second guide opening (211), and the upper and lower sides of the second guide opening form a second upper guide arc surface (212) and a second lower guide arc surface (213). When the first rotating support (11) and the second rotating support (21) are connected, a gap is reserved between the first upper guide arc surface (112) and the second upper guide arc surface (212) for the rotating connecting rod (31) to be installed therein; the first lower guide arc surface (113) and the second lower guide arc surface (213) directly abut against each other; the first upper guide arc surface (112), the rotating connecting rod (31) and the second upper guide arc surface (212) are connected by a fixing pin, and the first lower guide arc surface (113) and the second lower guide arc surface (213) are connected by another fixing pin.

[0012] The outer side of the first rotating support (11) is provided with a first support shaft head (114) pointing vertically to the axis, and the outer side of the second rotating support (21) is provided with a second support shaft head (214) pointing vertically to the axis. The first support shaft head (114) and the second support shaft head (214) are arranged coaxially and located in the middle of the two fixed pins, forming an isosceles triangle arrangement or a linear arrangement. The bottom extension of the arc-shaped anvil (2) is also provided with a swing connecting piece (2c). The swing connecting piece (2c) is provided with a pin hole. The second support shaft head (214) of the female head (20) is connected in the pin hole. The first support shaft head (114) and the second support shaft head (214) are also connected to the end of the transmission rod of the stapler, so that the arc-shaped anvil (2) is rotatably connected to the end of the transmission rod of the stapler through the pin.

[0013] The male head (10) also includes a nail box hinge (13), which is connected to the other end of the first half-pillar (12); The nail box hinge (13) is square in shape and has a pin hole in the middle. The pin hole is hinged to the nail box fixing seat (3) through a pin. The pin is also connected to the clamping piece (2b) of the arc-shaped pin seat (2), so that the arc-shaped pin seat (2) and the nail box fixing seat (3) are hinged together. The nail box hinge (13) is clamped between the arc-shaped pin seat (2) and the nail box fixing seat (3). The position of the rotating joint (1) is locked by the pin, and the nail box fixing seat (3) can open and close relative to the arc-shaped pin seat (2).

[0014] The male head's nail box hinge (13) also abuts against the end of the female head (20), so that when the nail box fixing seat (3) flips relative to the arc-shaped nail seat (2), the male head (10) and the female head (20) are subjected to force together by means of the nail box hinge (13).

[0015] On the outer side of the nail box hinge (13) away from the axis, a reinforcing structure (131) is also provided at the connection position between the nail box hinge (13) and the first semi-cylinder (12). The reinforcing structure (131) is a semi-cylinder designed to be formed around the axis of the rotating joint (1).

[0016] The axis refers to the axis at which the first half-cylinder (12) and the second half-cylinder (22) meet to form the cylinder.

[0017] The present invention provides a rotating joint structure for an arc-shaped stapler. The rotating joint is designed with an asymmetrical connection and drive structure to enable unilateral swinging drive of the rotating joint. It is connected to the arc-shaped anvil seat through a clamping groove structure, so that the rotating joint can maintain its structural strength when subjected to unilateral torque. Attached Figure Description

[0018] Figure 1-3 This is a perspective view of the male head of the present invention.

[0019] Figure 4-5 This is a perspective view of the female head of the present invention.

[0020] Figure 6 A schematic diagram of the structure of the arc-shaped anvil.

[0021] Figure 7-8 This is a schematic diagram of the rotating joint.

[0022] Figure 9 This is a schematic diagram of a rotating joint installed inside an arc-shaped anvil.

[0023] Figure 10 This is an exploded structural diagram of a rotating joint structure.

[0024] Figure 11 This is a schematic diagram of the arc-shaped anvil seat.

[0025] Figure 12 This is a schematic diagram of a single-sided connection between a rotary joint and a rotary connecting rod. Detailed Implementation

[0026] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items. Example

[0029] like Figure 1-12 As shown, the present invention provides a rotating joint structure for an arc-shaped stapler, including a rotating joint 1, an arc-shaped anvil seat 2, and a staple cartridge fixing seat 3. The rotating joint 1 is formed by the docking of a male head 10 and a female head 20 to form a cylindrical structure. After the male head 10 and the female head 20 are docked, an L-shaped clamping groove structure is formed on both sides of the cylindrical structure. The ends of the arc-shaped anvil 2 are provided with clamping pieces 2b that are bent upward from the bottom surface of the arc-shaped anvil 2. A mounting groove for mounting the rotating joint 1 is formed between the two clamping pieces 2b. A transverse insert 2a bent inward is formed at the ends of the two clamping pieces 2b. The clamping groove structure of the rotating joint 1 is aligned with the transverse insert 2a and inserted into the mounting groove of the arc-shaped anvil 2 from top to bottom, so that the female head 20 is located at the bottom of the arc-shaped anvil 2.

[0030] This invention designs inwardly recessed transverse inserts 2a at the ends of the two clamping pieces 2b of the arc-shaped anvil seat 2. Then, using a clamping groove structure formed by the mating of the female and male heads, the clamping groove structure of the rotating joint is aligned with the transverse inserts 2a of the arc-shaped anvil seat 2 and connected from top to bottom, so that the rotating joint is installed into the mounting groove of the arc-shaped anvil seat. Through the connection relationship between the clamping groove structure and the transverse inserts, the rotating joint can transmit the swinging torque to the arc-shaped anvil seat, thereby causing the arc-shaped anvil seat to swing. In this embodiment, the transverse inserts 2a and the clamping groove structure are connected by a tight fit, and the entire rotating joint is also connected by a tight fit to the mounting groove, so that the torque borne by the rotating joint can be directly transmitted to the arc-shaped anvil seat.

[0031] The male connector 10 is integrally formed, including a first rotating support 11 and a first semi-cylinder 12. The first rotating support 11 and the first semi-cylinder 12 are connected at one end away from the axis, and are separated at the axis to form an L-shaped longitudinal groove 121. The longitudinal groove 121 is a non-through structure. While opening the groove, it also ensures the integrity of the male connector 10, so that the male connector 10 can withstand greater torsional forces. The female head 20 is integrally formed, including a second rotating support 21 and a second semi-column 22. The second rotating support 21 and the second semi-column 22 are connected in the middle and separated on both sides to form transverse clamping grooves 221. The main body of the female head 20 between the two transverse clamping grooves 221 remains connected, and through the docking of the male head and the female head, the force on the female head can be partially or completely transferred to the male head. The male head and the female head as a whole bear the torque, which can improve the force-bearing effect of the rotating joint.

[0032] When the male head 10 and the female head 20 are connected, the longitudinal clamping groove 121 and the transverse clamping groove 221 form a directly connected clamping groove structure. The transverse insert 2a of the arc-shaped anvil seat 2 can be inserted into the transverse clamping groove 221 and the longitudinal clamping groove 121 at the same time, so that the transverse insert 2a is supported by the male head and the female head.

[0033] The insert 2a adopts a double-sided interlocking structure with a gap in the middle; the female head also has one transverse clamping groove 221 on each side. The position between the two transverse clamping grooves 221 connects the second rotating support 21 and the second half-column 22 of the female head 20. The middle position of the two transverse clamping grooves 221 just fits the middle gap of the two inserts 2a. The two inserts 2a protrude after passing through the two transverse clamping grooves 221, and the protruding part just fits into the longitudinal clamping groove 121 of the male head 10. In this embodiment, the inserts 2a are connected to the transverse clamping grooves 221 and the longitudinal clamping grooves 121 by a tight fit.

[0034] The rotating joint provided in this embodiment is tightly connected to the insert of the arc-shaped anvil through the clamping groove structure, so that the arc-shaped anvil can withstand the torque transmitted by the male head 10 with the longitudinal clamping groove 121 and the female head 20 with the transverse clamping groove 221. In this way, the male head 10 and the female head 20 bear the torque as a whole, and the torque is evenly distributed to the male head 10 (first rotating support 11 and first half-pillar 12) and the female head 20 (second rotating support 21 and second half-pillar 22) on both sides of the clamping groove through the clamping groove.

[0035] The male connector 10 has a stepped structure 121a on the outer side corresponding to the longitudinal groove 121, which cooperates with the transverse insert 2a of the arc-shaped anvil seat 2. The stepped structure 121a not only ensures that the male connector has a larger connection cross section and provides greater support, but also forms an integral and complete external structure together with the outer surface of the transverse insert 2a. The stepped structure itself also provides a guiding installation function for the transverse insert.

[0036] The first semi-cylinder 12 has a docking guide post 122 on its connecting surface, and the second semi-cylinder 22 has a docking guide hole 222 on its connecting surface. The first semi-cylinder 12 and the second semi-cylinder 22 are connected and positioned by the docking guide post 122 and the docking guide hole 222. The docking guide post 122 and the docking guide hole 222 are connected by a tight fit, thereby forming an integral structure for torque transmission between the first semi-cylinder 12 and the second semi-cylinder 22.

[0037] Both the male head 10 and the female head 20 have axial guide channels at the center of their mating surfaces to allow the nail box control mechanism to pass through; these guide channels divide the male head 10 and the female head 20 into left and right parts respectively.

[0038] The inner side of the first rotating support 11 is provided with a fan-shaped first guide opening 111, and the upper and lower sides of the first guide opening form a first upper guide arc surface 112 and a first lower guide arc surface 113. The inner side of the second rotating support 21 is provided with a fan-shaped second guide opening 211, and the upper and lower sides of the second guide opening form a second upper guide arc surface 212 and a second lower guide arc surface 213. When the first rotating support 11 and the second rotating support 21 are connected, a gap is reserved between the first upper guide arc surface 112 and the second upper guide arc surface 212 to accommodate the rotating connecting rod 31; the first lower guide arc surface 113 and the second lower guide arc surface 213 directly abut against each other; the first upper guide arc surface 112, the rotating connecting rod 31 and the second upper guide arc surface 212 are connected by a fixing pin (the fixing pin is located at the center of the arc surface of the first upper guide arc surface 112 and the second upper guide arc surface 212), and the first lower guide arc surface 113 and the second lower guide arc surface 213 are connected by another fixing pin (the fixing pin is located at the center of the arc surface of the first lower guide arc surface 113 and the second lower guide arc surface 213). In this embodiment, the rotating connecting rod 31 is designed on only one side, while the two rotating supports on the other side are directly connected, thereby improving the torque support force. The right-angled triangular structure layout formed by a fixed pin (between the first lower guide surface 113 and the second lower guide surface 213) and two connecting guide posts 122 makes the connection between the male and female heads more stable. When the fixed pin connected to it is driven by the rotating connecting rod 31, the male and female heads can move as a whole.

[0039] In this embodiment, the rotating joint uses a rotating link to drive the male and female heads on one side, while the male and female heads on the other side adopt a direct abutment docking method. This greatly increases the contact area between the male and female heads and improves the overall performance of the male and female heads, thereby enhancing their resistance to deformation under swing torque.

[0040] The outer side of the first rotating support 11 is provided with a first support shaft head 114 pointing vertically to the axis, and the outer side of the second rotating support 21 is provided with a second support shaft head 214 pointing vertically to the axis. The first support shaft head 114 and the second support shaft head 214 are arranged coaxially and located in the middle of the two fixed pins, forming an isosceles triangle arrangement or a linear arrangement. The bottom extension of the arc-shaped anvil seat 2 is also provided with a swing connecting piece 2c. The swing connecting piece 2c is provided with a pin hole. The second support shaft head 214 of the female head 20 is connected in the pin hole. The first support shaft head 114 and the second support shaft head 214 are also connected to the end of the transmission rod of the stapler, so that the arc-shaped anvil seat 2 is rotatably connected to the end of the transmission rod of the stapler through the pin.

[0041] The male head 10 also includes a nail box hinge 13, which is connected to the other end of the first half-pillar 12; The nail box hinge 13 is square in shape and has a pin hole in the middle. The pin hole is hinged to the nail box fixing seat 3 through a pin. The pin is also connected to the clamping piece 2b of the arc-shaped nail abutment 2, so that the arc-shaped nail abutment 2 and the nail box fixing seat 3 are hinged together. The nail box hinge 13 is clamped between the arc-shaped nail abutment 2 and the nail box fixing seat 3. The position of the rotating joint 1 is locked by the pin, and the nail box fixing seat 3 can open and close relative to the arc-shaped nail abutment 2.

[0042] The male head's nail box hinge 13 also abuts against the end of the female head 20, so that when the nail box fixing seat 3 flips relative to the arc-shaped nail abutment seat 2, the male head 10 and the female head 20 share the force through the nail box hinge 13.

[0043] On the outer side of the nail box hinge 13 away from the axis, a reinforcing structure 131 is also provided at the connection position between the nail box hinge 13 and the first semi-cylinder 12. The reinforcing structure 131 is a semi-cylindrical shape designed around the axis of the rotating joint 1, which can improve the connection strength between the nail box hinge 13 and the first semi-cylinder 12. The reinforcing structure can be a regular or irregular reinforcing rib. In this embodiment, a cylindrical reinforcing rib is used, which can not only enhance the structural stability, but also facilitate the rotation of the rotating joint.

[0044] The outer side of the first rotating support 11 is provided with a first support shaft head 114 pointing vertically to the axis, and the outer side of the second rotating support 21 is provided with a second support shaft head 214 pointing vertically to the axis. The first support shaft head 114 and the second support shaft head 214 are arranged coaxially and located between the two fixing pins.

[0045] The axis refers to the axis at which the first half-cylinder 12 and the second half-cylinder 22 meet to form the cylinder.

[0046] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0047] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A rotating joint structure for an arc-shaped stapler, comprising a rotating joint (1), an arc-shaped anvil (2), and a staple holder (3), wherein the rotating joint (1) is formed by the mating of a male head (10) and a female head (20) to form a cylindrical structure, characterized in that, After the male head (10) and the female head (20) are connected, an L-shaped clamping structure is formed on both sides of the cylindrical structure; The ends of the arc-shaped anvil (2) are provided with clamping pieces (2b) bent upward from the bottom surface of the arc-shaped anvil (2). An installation groove for mounting the rotating joint (1) is formed between the two clamping pieces (2b). A transverse insert (2a) bent inward is formed at the ends of the two clamping pieces (2b). The clamping groove structure of the rotating joint (1) is aligned with the transverse insert (2a) and inserted into the installation groove of the arc-shaped anvil (2) from top to bottom, so that the female head (20) is located at the bottom of the arc-shaped anvil (2). The male head (10) is integrally formed and includes a first rotating support (11) and a first semi-cylinder (12). The first rotating support (11) and the first semi-cylinder (12) are connected at one end away from the axis and are separated at the side near the axis to form a longitudinal clamping groove (121). The female head (20) is integrally formed and includes a second rotating support (21) and a second semi-cylinder (22). The second rotating support (21) and the second semi-cylinder (22) are connected in the middle and are separated on both sides to form a transverse clamping groove (221). When the male head (10) and the female head (20) are connected, the longitudinal clamping groove (121) and the transverse clamping groove (221) form a clamping groove structure that is directly connected. After the transverse insert (2a) of the arc-shaped anchor seat (2) is inserted into the clamping groove structure, it can be clamped by the transverse clamping groove (221) and the longitudinal clamping groove (121) at the same time.

2. The rotating joint structure of an arc-shaped anastomosis device according to claim 1, characterized in that, The male head (10) has a stepped structure (121a) on the outer side corresponding to the longitudinal groove (121) to cooperate with the transverse insert (2a) of the arc-shaped anchor seat (2).

3. The rotating joint structure of the arc-shaped anastomosis device according to claim 1, characterized in that, The first half-cylinder (12) is provided with a docking guide post (122) on its connecting surface, and the second half-cylinder (22) is provided with a docking guide hole (222) on its connecting surface. The first half-cylinder (12) and the second half-cylinder (22) are connected and positioned by the docking guide post (122) and the docking guide hole (222).

4. The rotating joint structure of an arc-shaped anastomosis device according to claim 1, characterized in that, The male head (10) and the female head (20) are provided with axial guide channels at the axial center of their mating surfaces to allow the nail box control mechanism to pass through; the axial center refers to the center of the cylinder formed by the mating of the first half-cylinder (12) and the second half-cylinder (22).

5. The rotating joint structure of an arc-shaped anastomosis device according to claim 1, characterized in that, The inner side of the first rotating support (11) is provided with a fan-shaped first guide opening (111), and the upper and lower sides of the first guide opening form a first upper guide arc surface (112) and a first lower guide arc surface (113). The inner side of the second rotating support (21) is provided with a fan-shaped second guide opening (211), and the upper and lower sides of the second guide opening form a second upper guide arc surface (212) and a second lower guide arc surface (213). When the first rotating support (11) and the second rotating support (21) are connected, a gap is reserved between the first upper guide surface (112) and the second upper guide surface (212) to allow the rotating connecting rod (31) to be installed therein; The first lower guide surface (113) and the second lower guide surface (213) are directly in contact; the first upper guide surface (112), the rotating connecting rod (31) and the second upper guide surface (212) are connected by a fixing pin, and the first lower guide surface (113) and the second lower guide surface (213) are connected by another fixing pin.

6. The rotating joint structure of an arc-shaped anastomosis device according to claim 5, characterized in that, The outer side of the first rotating support (11) is provided with a first support shaft head (114) pointing vertically to the axis, and the outer side of the second rotating support (21) is provided with a second support shaft head (214) pointing vertically to the axis. The first support shaft head (114) and the second support shaft head (214) are arranged coaxially and located in the middle of the two fixed pins, forming an isosceles triangle arrangement or a linear arrangement. The bottom extension of the arc-shaped anvil (2) is also provided with a swing connecting piece (2c). The swing connecting piece (2c) is provided with a pin hole. The second support shaft head (214) of the female head (20) is connected in the pin hole. The first support shaft head (114) and the second support shaft head (214) are also connected to the end of the transmission rod of the stapler, so that the arc-shaped anvil (2) is rotatably connected to the end of the transmission rod of the stapler through the pin.

7. The rotating joint structure of an arc-shaped anastomosis device according to claim 1, characterized in that, The male head (10) also includes a nail box hinge (13), which is connected to the other end of the first half-pillar (12); The nail box hinge (13) is square in shape and has a pin hole in the middle. The pin hole is hinged to the nail box fixing seat (3) through a pin. The pin is also connected to the clamping piece (2b) of the arc-shaped pin seat (2), so that the arc-shaped pin seat (2) and the nail box fixing seat (3) are hinged together. The nail box hinge (13) is clamped between the arc-shaped pin seat (2) and the nail box fixing seat (3). The position of the rotating joint (1) is locked by the pin, and the nail box fixing seat (3) can open and close relative to the arc-shaped pin seat (2).

8. The rotating joint structure of an arc-shaped anastomosis device according to claim 7, characterized in that, The male head's nail box hinge (13) also abuts against the end of the female head (20), so that when the nail box fixing seat (3) flips relative to the arc-shaped nail seat (2), the male head (10) and the female head (20) are subjected to force together by means of the nail box hinge (13).

9. The rotating joint structure of an arc-shaped anastomosis device according to claim 8, characterized in that, On the outer side of the nail box hinge (13) away from the axis, a reinforcing structure (131) is also provided at the connection position between the nail box hinge (13) and the first semi-cylinder (12). The reinforcing structure (131) is a semi-cylinder designed to be formed around the axis of the rotating joint (1).

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