Anastomat

Abstract

The utility model provides an anastomat, and relates to the technical field of medical instruments. The anastomat comprises a knife pushing piece, a turning joint assembly, a far-end assembly and a shaft assembly, wherein the turning joint assembly comprises a turning joint, a connecting piece assembly and a knife protecting piece; the turning joint is connected with the far-end assembly, and the shaft assembly and the turning joint are rotationally connected with the connecting piece assembly; an inserting hole is formed in the knife protecting piece, and the knife pushing piece penetrates through the shaft assembly and the inserting hole to be connected with the far-end assembly; a joint pin shaft is arranged at the far end of the knife protection piece, a connecting shaft is arranged at the near end of the knife protection piece, the joint pin shaft is rotationally connected with the turning joint assembly, the connecting shaft is rotationally connected with the connecting piece assembly, and the joint pin shaft can move relative to the turning joint assembly or the connecting shaft can move relative to the connecting piece assembly. According to the anastomat provided by the invention, the knife pushing piece penetrates through the insertion hole in the knife protecting piece, and the knife protecting piece protects the bent part of the knife pushing piece, so that the situation that the turning part of the knife pushing piece is excessively bent is prevented.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of medical appliances, and particularly relates to an anastomat. BACKGROUND

[0002] The anastomat is a kind of medical instrument widely used in the medical field, which is mainly used for connecting and suturing tissues and organs in surgical operations. The working principle of the anastomat is to combine the tissues to be connected by a mechanical way and fix them by using special nails or sutures.

[0003] When the anastomat is fired, the push blade will bear an axial force of 600N-1000N, the front end will bear the resistance of the nail pushing, and the rear end will bear the firing force of the firing rod. However, the push blade itself is a flexible structure, and when it bears an excessive axial force, it is easy to be excessively bent at the turning joint part, and in severe cases, it will be folded and unable to advance and retreat the knife, resulting in serious failure. CONTENT OF THE UTILITY MODEL

[0004] The purpose of the embodiment of the application is to provide an anastomat to solve the technical problem that the push blade of the anastomat lacks protection at the turning joint part when fired, which leads to easy excessive bending.

[0005] To achieve the above-mentioned purpose, the technical scheme adopted by the application is:

[0006] The application provides an anastomat, which comprises a push blade, a turning joint assembly, a distal end assembly and a shaft assembly. The turning joint assembly comprises a turning joint, a connecting piece assembly and a knife guard. The turning joint is connected with the distal end assembly, and the shaft assembly and the turning joint are both rotationally connected with the connecting piece assembly. The knife guard is provided with a socket, the push blade passes through the shaft assembly and the socket and is connected with the distal end assembly. The distal end of the knife guard is provided with a joint pin shaft, and the proximal end of the knife guard is provided with a connecting shaft. The joint pin shaft is rotationally connected with the turning joint assembly, and the connecting shaft is rotationally connected with the connecting piece assembly. In addition, the joint pin shaft can also move relative to the turning joint assembly, or the connecting shaft can also move relative to the connecting piece assembly.

[0007] In some implementations, the socket is provided with a protective layer for reducing friction on at least two inner sides in the thickness direction of the push blade.

[0008] In some implementations, the two inner sides of the knife guard in the thickness direction of the push blade are respectively a first inner side and a second inner side. The distance between the first inner side and the second inner side is greater than the thickness of the push blade. Both the first inner side and the second inner side are arc surfaces. The middle region of the first inner side is curved away from the second inner side, and the middle region of the second inner side is curved away from the first inner side.

[0009] In some implementations, the curvature of the first inner side surface is adapted to the maximum bending curvature of the section of the push blade located in the guard in bending to the right, and the curvature of the second inner side surface is adapted to the maximum bending curvature of the section of the push blade located in the guard in bending to the left.

[0010] In some implementations, the first inner side surface is provided with a first chamfered surface at both ends along the length direction of the push blade, and the second inner side surface is provided with a second chamfered surface at both ends along the length direction of the push blade.

[0011] In some implementations, the anastomat further comprises a pull rod, one end of the pull rod is rotationally connected with the distal end assembly, and the guard is provided with an opening on the side wall close to the pull rod along the thickness direction of the push blade to avoid the pull rod.

[0012] In some implementations, the guard is provided with a connecting shaft on the two opposite outer side surfaces along the width direction of the push blade, the connecting plate assembly is provided with a shaft hole extending along the length direction of the shaft assembly, and the connecting shaft is connected with the shaft hole to enable the guard to rotate and move relative to the connecting plate assembly; or,

[0013] The guard is provided with a joint pin shaft on the two opposite outer side surfaces along the width direction of the push blade, the turning joint assembly is provided with a joint insertion hole extending along the length direction of the shaft assembly, and the joint pin shaft is connected with the joint insertion hole to enable the guard to rotate and move relative to the turning joint assembly.

[0014] In some implementations, the guard comprises a first protection part and a second protection part, the first protection part and the second protection part are matched with each other, and the first protection part and the second protection part are enclosed to form an insertion hole.

[0015] In some implementations, the first protection part and the second protection part are connected by insertion or welding.

[0016] In some implementations, the first protection part comprises a first flat plate, a first left arc-shaped plate and a first right arc-shaped plate extending from the first flat plate in the same direction and oppositely arranged, the extension distance of the first left arc-shaped plate is greater than that of the first right arc-shaped plate, a gap is provided in the middle region of the first right arc-shaped plate, one end of the gap extends to the first flat plate, and the other end extends to the side of the first right arc-shaped plate away from the first flat plate.

[0017] The second protection part comprises a second flat plate and a second right arc-shaped plate, when the first protection part and the second protection part are matched, the second flat plate is oppositely arranged with the first flat plate along the width direction of the push blade, the second right arc-shaped plate is arranged on the side of the second flat plate facing the first flat plate, there is a gap between the second right arc-shaped plate and the first right arc-shaped plate along the width direction of the push blade to form an opening, and the first left arc-shaped plate is connected with the side of the second flat plate facing the first flat plate.

[0018] The beneficial effects of the present application are as follows: in the embodiment, the push blade passes through the insertion hole on the blade guard, and the blade guard protects the bending part of the push blade to prevent the bending part of the push blade from being excessively bent; in addition, the embodiment not only limits the rotation connection between the turning joint and the connecting plate assembly and the blade guard, but also limits the rotation connection structure between the connecting plate assembly and the blade guard and / or the connection structure between the turning joint and the blade guard to guide the movement of the blade guard, so that when the turning joint rotates relative to the connecting plate assembly, the blade guard also normally rotates and does not appear to be stuck. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiments or prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0020] Figure 1 The structure schematic diagram of the anastomat provided by the embodiment of the present application is shown in the figure.

[0021] Figure 2 The schematic diagram of the oscillation of the distal assembly relative to the shaft assembly provided by the embodiment of the present application is shown in the figure.

[0022] Figure 3 Another schematic diagram of the oscillation of the distal assembly relative to the shaft assembly provided by the embodiment of the present application is shown in the figure.

[0023] Figure 4 The structure schematic diagram of the anastomat provided by the embodiment of the present application is shown in the figure. Figure 1 The partial enlarged view of a in the figure.

[0024] Figure 5 The schematic diagram of the oscillation of the distal assembly relative to the shaft assembly provided by the embodiment of the present application is shown in the figure. Figure 4 The exploded schematic diagram of the structure shown in the figure.

[0025] Figure 6 The structure schematic diagram of the blade guard provided by the embodiment of the present application is shown in the figure.

[0026] Figure 7 The principle diagram of the action of the blade guard relative to the connecting plate assembly provided by the embodiment of the present application is shown in the figure.

[0027] Figure 8 The schematic diagram of the oscillation of the second protection part with the push blade provided by the embodiment of the present application is shown in the figure.

[0028] Figure 9 The structure schematic diagram of the first protection part provided by the embodiment of the present application is shown in the figure.

[0029] Figure 10 The structure schematic diagram of the second protection part provided by the embodiment of the present application is shown in the figure.

[0030] In the drawings:

[0031] 100 - stapler

[0032] 1 - push blade; 2 - turning joint assembly; 3 - pull rod; 4 - distal assembly; 5 - shaft assembly; 6 - handle portion

[0033] 21 - turning joint; 22 - connecting plate assembly; 23 - blade guard

[0034] 211 - first joint portion; 212 - second joint portion; 213 - pull rod pin; 214 - joint receptacle

[0035] 221 - first connecting plate; 222 - second connecting plate; 223 - shaft hole

[0036] 231 - receptacle; 232 - first inner side; 233 - second inner side; 234 - chamfer; 235 - connecting shaft; 236 - joint pin; 237 - first guard portion; 238 - second guard portion; 239 - first outer side; 2310 - gap

[0037] 2371 - first flat plate; 2372 - first left arc plate; 2373 - first right arc plate; 2374 - gap; 2375 - connecting pin

[0038] 2381 - second flat plate; 2382 - second right arc plate

[0039] 41 - staple cartridge seat; 42 - anvil

[0040] 51 - inner cylinder structure; 52 - outer cylinder structure DETAILED DESCRIPTION

[0041] In order to make the technical problems to be solved by the present application, technical solutions and beneficial effects more clearly, the present application will be further described in detail below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not intended to limit the present application.

[0042] It should be noted that when an element is referred to as being "fixed to" or "set to" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0043] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like, indicate directions or positions based on the directions or positions shown in the drawings, and are used only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0044] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0045] Please refer to Figures 1-10 , the anastomosis device 100 provided by the embodiment of the present application will be described.

[0046] The embodiment provides an anastomosis device 100, which comprises a push blade 1, a turning joint assembly 2, a distal end assembly 4 and a shaft assembly 5.

[0047] Please refer to Figure 1 , the anastomosis device 100 is shown, one end of the shaft assembly 5 is rotationally connected with the distal end assembly 4 through the turning joint assembly 2, the other end of the shaft assembly 5 is connected with the handle part 6 of the anastomosis device 100, and the distal end assembly 4 can swing relative to the shaft assembly 5 through the turning joint assembly 2.

[0048] Please refer to Figure 1 , generally, the distal end assembly 4 comprises a staple cartridge seat 41 (a distal end effector) and an anvil 42, the staple cartridge seat 41 is used for accommodating a staple cartridge, the anvil 42 is rotationally connected with the staple cartridge seat 41 and can move between an open position and a closed position, when the staple cartridge seat 41 is installed with the staple cartridge and is in the relative closed position with the anvil 42, a suturing operation can be performed on the tissue clamped between the staple cartridge seat 41 and the anvil 42, and after the anastomosis staple penetrates the tissue, the anastomosis staple is deformed under the action of the anvil 42, so that the tissue is anastomosed. When the distal end assembly 4 swings relative to the shaft assembly 5, the staple cartridge seat 41 and the anvil 42 swing together relative to the shaft assembly 5. Please refer to Figure 2 , the anvil 42 is shown to swing a certain angle to the left relative to the shaft assembly 5, and refer to Figure 3 , the anvil 42 is shown to swing a certain angle to the right relative to the shaft assembly 5.

[0049] The pusher blade 1 is arranged in the shaft assembly 5, one end of the pusher blade 1 is connected with the cutting knife in the distal end assembly 4 through the turning joint assembly 2, and the other end of the pusher blade 1 is connected with the handle part 6. By operating the handle part 6, the cutting knife is pushed under the action of the pusher blade 1 to close the staple cartridge seat 41 and the anvil 42, and the firing of the anastomat 100 is realized, and the tissue anastomosis is performed. As for the connection structure of the pusher blade 1, the handle part 6 and the distal end assembly 4, the prior art can be adopted, and the embodiment will not be described in detail.

[0050] As for the turning joint assembly 2, please refer to Figure 4 and Figure 5 The turning joint assembly 2 comprises a turning joint 21, a connecting piece assembly 22 and a guard 23. The turning joint 21 is connected with the distal end assembly 4, the connecting piece assembly 22 is connected with the shaft assembly 5, the turning joint 21 is rotationally connected with the connecting piece assembly 22, and the turning joint 21 can rotate relative to the connecting piece assembly 22 together with the distal end assembly 4, so that the distal end assembly 4 rotates relative to the shaft assembly 5.

[0051] Generally, the shaft assembly 5 comprises an outer cylinder structure 52 and an inner cylinder structure 51, the inner cylinder structure 51 is arranged in the outer cylinder structure 52, and the pusher blade 1 passes through the inner cylinder structure 51. Please refer to Figure 4 which shows the outer cylinder structure 52. Please refer to Figure 5 which shows the inner cylinder structure 51, and the connecting piece assembly 22 is connected with the inner cylinder structure 51 of the shaft assembly 5.

[0052] The anastomat 100 further comprises a pull rod 3. Please refer to Figure 4 and Figure 5 which show the pull rod 3. The pull rod pin 213 is arranged on the turning joint assembly 2, and the pull rod pin 213 passes through the hole on the pull rod 3. By operating the pull rod 3 through the handle part 6, the pull rod 3 drives the turning joint 21 and the distal end assembly 4 to rotate relative to the connecting piece assembly 22, so that the distal end assembly 4 rotates relative to the shaft assembly 5. As for the connection structure of the pull rod 3 and the handle part 6, the prior art can be adopted, and the embodiment will not be described in detail.

[0053] Please refer to Figure 6 which shows the guard 23. The guard 23 is provided with a insertion hole 231, and the pusher blade 1 is connected with the distal end assembly 4 through the shaft assembly 5 and the insertion hole 231. Please refer to Figure 5 which shows the pusher blade 1, Figure 5 which shows the section of the pusher blade 1 between the shaft assembly 5 and the distal end assembly 4, and the section passes through the insertion hole 231 on the guard 23. When the distal end assembly 4 rotates relative to the shaft assembly 5, the area of the pusher blade 1 passing through the guard 23 will also be bent, and the guard 23 protects the bent part of the pusher blade 1 to prevent the bent part of the pusher blade 1 from being excessively bent.

[0054] In this embodiment, the blade guard 23 protects the bending part of the push blade 1, but does not affect the natural bending of the push blade 1 due to the yaw of the distal assembly, so when the distal assembly 4 rotates relative to the shaft assembly 5, the position of the blade guard 23 also needs to change to adapt to the bending of the push blade.

[0055] In this embodiment, the turning joint 21 and the connecting plate assembly 22 are connected with the blade guard 23, and the turning joint 21 and the connecting plate assembly 22 are rotatably connected with the blade guard 23. At the same time, in this embodiment, the connecting structure between the connecting plate assembly 22 and the blade guard 23 and / or the connecting structure between the turning joint 21 and the blade guard 23 can guide the movement of the blade guard 23. So that when the turning joint 21 rotates relative to the connecting plate assembly 22, the blade guard 23 can rotate with the turning joint 21, so as not to affect the bending of the push blade 1.

[0056] Regarding the connection of the turning joint 21 and the blade guard 23, the distal end of the blade guard 23 is provided with a joint pin shaft 236, and the joint pin shaft 236 is rotatably connected with the turning joint assembly 2. Regarding the connection of the connecting plate assembly 22 and the blade guard 23, the proximal end of the blade guard 23 is provided with a connecting shaft 235, and the connecting shaft 235 is rotatably connected with the connecting plate assembly 22.

[0057] In this embodiment, the joint pin shaft 236 and the connecting shaft 235 are used to realize the rotary connection with the turning joint 21 and the connecting plate assembly 22, which is simple in structure. In addition, regarding the distal end of the blade guard 23, that is, the end of the blade guard 23 close to the distal assembly 4, regarding the proximal end of the blade guard 23, that is, the end of the blade guard 23 close to the shaft assembly 5.

[0058] Regarding the connection of the turning joint 21 and the connecting plate assembly 22 with the blade guard 23, in a specific example, the blade guard 23 is rotatably connected with the turning joint 21 and the connecting plate assembly 22, and the rotary connection structure between the turning joint 21 and the blade guard 23 can guide the movement of the blade guard 23; or, in another specific example, the blade guard 23 is rotatably connected with the turning joint 21 and the connecting plate assembly 22, and the rotary connection structure between the connecting plate assembly 22 and the blade guard 23 can guide the movement of the blade guard 23; or, in another specific example, the blade guard 23 is rotatably connected with the turning joint 21 and the connecting plate assembly 22, and the rotary connection structure between the connecting plate assembly 22 and the blade guard 23 and the rotary connection structure between the turning joint 21 and the blade guard 23 can guide the movement of the blade guard 23.

[0059] Specifically, taking the example that both the connecting piece assembly 22 and the turning joint 21 are rotatably connected to the blade guard 23, and the rotatable connection structure between the connecting piece assembly 22 and the blade guard 23 can guide the movement of the blade guard 23, it is explained that when the turning joint 21 rotates relative to the connecting piece assembly 22, the blade guard 23 rotates together with the turning joint 21:

[0060] The rotation axis of the turning joint 21 and the connecting plate assembly 22 is A; the rotation axis between the blade guard 23 and the turning joint 21 is B; and the rotation axis between the blade guard 23 and the connecting plate assembly 22 is C. When the distal assembly 4 does not deflect, rotation axis A is located between rotation axes B and C. Please refer to [link to relevant documentation]. Figure 3 When the distal component 4 swings to the right to its maximum angle relative to the shaft component 5, the positional relationship between rotation axis A, rotation axis B, and rotation axis C can be as follows: Figure 7 As shown, in Figure 7 The rotating axes A, B, and C form a triangle. When the amplitude of the rightward swing of the distal assembly 4 relative to the shaft assembly 5 decreases, the rotation axis B between the blade guard 23 and the turning joint 21 changes with the position of the distal assembly 4. However, since the length of the blade guard 23 remains unchanged (i.e., the length BC remains unchanged), the blade guard 23 needs to rotate relative to the connecting piece assembly 22 while also being able to move. For example, based on the positional relationship of the three rotating axes, when the rotating axis B' rotates to... Figure 7 When the blade guard 23 is in position B as shown, the rotation axis of the blade guard 23 and the connecting plate assembly 22 needs to be moved upward to position C' to ensure that when the turning joint 21 rotates relative to the connecting plate assembly 22, the blade guard 23 also rotates normally and does not get stuck.

[0061] By combining Figure 7 Analysis shows that when the turning joint 21 rotates relative to the connecting piece assembly 22, the blade guard 23 can also rotate normally. Therefore, the blade guard 23 needs to be rotatably connected to both the turning joint 21 and the connecting piece assembly 22, and simultaneously, the blade guard 23 needs to be movable relative to at least one of the turning joint 21 and the connecting piece assembly 22. Therefore, in this embodiment, the turning joint 21 and the connecting piece assembly 22 are rotatably connected to the blade guard 23. At the same time, the connection structure between the connecting piece assembly 22 and the blade guard 23 and / or the connection structure between the turning joint 21 and the blade guard 23 is designed to guide the movement of the blade guard 23.

[0062] In the embodiment, the guard piece 23 protects the bending part of the push blade 1 by passing the push blade 1 through the insertion hole 231 on the guard piece 23, so as to prevent the bending part of the push blade 1 from being excessively bent. In addition, the embodiment not only limits the rotation connection between the turning joint 21 and the connecting piece assembly 22 and the guard piece 23, but also limits the connection structure between the connecting piece assembly 22 and the guard piece 23 and / or the connection structure between the turning joint 21 and the guard piece 23 to guide the movement of the guard piece 23, so that when the turning joint 21 rotates relative to the connecting piece assembly 22, the guard piece 23 also rotates normally and does not appear to be stuck.

[0063] In the example of setting the rotation and movement of the guard piece 23 relative to the connecting piece assembly 22, in an embodiment, the guard piece 23 is provided with a connecting shaft 235 on the two opposite outer sides in the width direction of the push blade 1, the connecting piece assembly 22 is provided with a shaft hole 223 extending in the length direction of the shaft assembly 5, and the connecting shaft 235 is connected with the shaft hole 223, so as to make the guard piece 23 rotate and move relative to the connecting piece assembly 22.

[0064] Please refer to Figure 5 , in an embodiment, the connecting piece assembly 22 includes a first connecting piece 221 and a second connecting piece 222, the first connecting piece 221 and the second connecting piece 222 are oppositely and spacedly arranged, the guard piece 23 is arranged between the first connecting piece 221 and the second connecting piece 222, and one end of the first connecting piece 221 and one end of the second connecting piece 222 are rotationally connected with the turning joint 21.

[0065] In the embodiment, the connecting shaft 235 can be arranged on the two opposite outer sides of the guard piece 23 in the width direction of the push blade 1, and the shaft hole 223 can be arranged on the first connecting piece 221 and the second connecting piece 222.

[0066] For the connecting shaft 235 arranged on the two opposite outer sides of the guard piece 23 in the width direction of the push blade 1, and the shaft hole 223 arranged on the first connecting piece 221 and the second connecting piece 222, the specific arrangement can be as follows: please refer to Figure 6 , the connecting shaft 235 is arranged on the two opposite outer sides of the guard piece 23 in the width direction of the push blade 1, respectively, the width direction of the push blade 1 is along the direction of the Z-axis in the Figure 6 , the two opposite outer sides of the guard piece 23 in the width direction of the push blade 1 are a first outer side 239 and a second outer side, please refer to Figure 6 , the first outer side 239 is shown, and the connecting shaft 235 is arranged on the first outer side 239 and the second outer side, respectively. Please refer to Figure 5, the first connecting piece 221 and the second connecting piece 222 are respectively provided with an axle hole 223 matched with the corresponding connecting axle 235, the axle hole 223 extends along the length direction of the connecting piece assembly 22, that is, the axle hole 223 on the first connecting piece 221 extends along the length direction of the first connecting piece 221, and the axle hole 223 on the second connecting piece 222 extends along the length direction of the second connecting piece 222. Please refer to Figure 5 , the length direction of the first connecting piece 221 and the second connecting piece 222 is along the X-axis direction in the figure Figure 5 , the length of the axle hole 223 along the X-axis direction is greater than the diameter of the connecting axle 235, so as to facilitate the movement of the guide blade guard 23 relative to the first connecting piece 221 and the second connecting piece 222.

[0067] Please refer to Figure 5 , the connecting axle 235 is in the shape of a cylinder, and the axle hole 223 is in the shape of a waist hole, so that the connecting axle 235 can not only rotate relative to the axle hole 223, but also move along the axle hole 223. The axis of the connecting axle 235 on the first outer side 239 is collinear with the axis of the connecting axle 235 on the second outer side, and the axis of the connecting axle 235 on the first outer side 239 and the axis of the connecting axle 235 on the second outer side together form the rotation axis C of the blade guard 23 and the connecting piece assembly 22.

[0068] In this embodiment, the blade guard 23 and the connecting piece assembly 22 are matched through the connecting axle 235 and the axle hole 223, which is simple in structure and convenient for processing.

[0069] In the example of setting the rotation of the blade guard 23 relative to the turning joint 21, in one embodiment, the blade guard 23 is provided with a joint pin shaft 236 on the two opposite outer sides in the width direction of the push blade 1, and the turning joint assembly 2 is provided with a joint insertion hole 214, and the joint pin shaft is connected with the joint insertion hole 214, so that the blade guard 23 rotates relative to the turning joint assembly 2.

[0070] Please refer to Figure 6 , the blade guard 23 is respectively provided with a joint pin shaft 236 on the two opposite outer sides in the width direction of the push blade 1, and the turning joint assembly 2 is provided with a joint insertion hole 214, and the joint pin shaft is connected with the joint insertion hole 214, so that the blade guard 23 rotates relative to the turning joint assembly 2. Figure 6 , the two opposite outer sides of the blade guard 23 in the width direction of the push blade 1 are respectively a first outer side 239 and a second outer side, please refer to Figure 6 , the first outer side 239 is shown, and the joint pin shaft 236 is respectively arranged on the first outer side 239 and the second outer side. Please refer to Figure 5 and Figure 6 , the turning joint 21 is respectively provided with a joint insertion hole 214 matched with the corresponding joint pin shaft 236, wherein Figure 5 and Figure 6Only the joint socket 214 matched with the joint pin shaft 236 on the first outer side surface 239 is shown, and the joint socket 214 matched with the joint pin shaft 236 on the second outer side surface is not shown.

[0071] In the embodiment, the axis of the joint pin shaft 236 on the first outer side surface 239 is collinear with the axis of the joint pin shaft 236 on the second outer side surface, and the axis of the joint pin shaft 236 on the first outer side surface 239 and the axis of the joint pin shaft 236 on the second outer side surface form the rotation axis B between the blade guard 23 and the turning joint 21.

[0072] In a specific example, the joint pin shaft 236 is cylindrical, and the joint socket 214 is a circular hole, and the joint pin shaft 236 is rotationally connected with the joint socket 214.

[0073] In the embodiment, the blade guard 23 and the turning joint 21 are matched through the joint pin shaft 236 and the joint socket 214, which is simple in structure and convenient to process.

[0074] For the turning joint 21, please refer to Figure 4 and Figure 5 The turning joint 21 includes a first joint part 211 and a second joint part 212, and the second joint part 212 is preferably integrally formed on the anvil 42 of the end effector 4. The first joint part 211 is fixedly connected with the second joint part 212. The joint socket 214 is arranged on both the first joint part 211 and the second joint part 212, please refer to Figure 4 and Figure 5 The joint socket 214 arranged on the first joint part 211 is shown.

[0075] The first connecting piece 221 is rotationally connected with the first joint part 211, and the second connecting piece 222 is rotationally connected with the second joint part 212. The rotation axis between the first connecting piece 221 and the first joint part 211 is collinear with the rotation axis between the second connecting piece 222 and the second joint part 212, and the rotation axis between the first connecting piece 221 and the first joint part 211 and the rotation axis between the second connecting piece 222 and the second joint part 212 form the rotation axis A of the turning joint 21 and the connecting piece assembly 22.

[0076] In the example of setting the rotation and movement of the blade guard 23 relative to the turning joint 21, in an embodiment, the joint pin shaft 236 is arranged on the opposite two outer side surfaces of the blade guard 23 along the width direction of the blade 1, the joint socket 214 is arranged on the turning joint assembly 2, the joint pin shaft 236 is inserted into the corresponding joint socket 214, and the joint socket 214 extends along the length direction of the shaft assembly 5, so as to make the blade guard 23 rotate and move relative to the turning joint assembly 2.

[0077] In this embodiment, the joint socket 214 is a waist-shaped hole, and the joint pin shaft 236 can move along the waist-shaped joint socket 214. At this time, the shaft hole 223 is shaped to match the connecting shaft 235, for example, the connecting shaft 235 is cylindrical, and the shaft hole 223 is a circular hole.

[0078] In one embodiment, the insertion hole 231 is provided with a protective layer on at least two inner sides in the thickness direction of the push blade 1 to reduce friction.

[0079] Please refer to Figure 5 , the length direction of the push blade 1 is defined as the X-axis direction, the thickness direction of the push blade 1 is defined as the Y-axis direction, and the width direction of the push blade 1 is defined as the Z-axis direction. Please refer to Figure 6 , the guard 23 is along the thickness direction of the push blade 1, that is, the Y-axis direction in Figure 6 , the two inner sides opposite to each other in the thickness direction of the push blade 1 are respectively the first inner side 232 and the second inner side 233. In this embodiment, a protective layer is provided on at least the first inner side 232 and the second inner side 233 to reduce friction.

[0080] Preferably, the protective layer is provided not only on the first inner side 232 and the second inner side 233, but also on the two inner sides opposite to each other in the width direction of the push blade 1 to reduce friction.

[0081] Preferably, the material of the protective layer can be Polytetrafluoroethylene (PTFE), PTFE material or nickel-polytetrafluoroethylene (NI-PTFE) composite material. For example, the inner side of the guard 23 can be wrapped with a layer of PTFE plastic by secondary injection molding or double-color injection molding, which is used to replace the metal guard 23 in contact with the push blade 1, so as to reduce the friction between the guard 23 and the push blade 1, thereby reducing the firing resistance of the stapler 100 to a certain extent. The surface of the guard 23 can also be plated with a PTFE or NI-PTFE coating to reduce the friction between the guard 23 and the push blade 1.

[0082] Regarding the shape of the insertion hole 231 on the guard 23, in one embodiment, please refer to Figure 6 , the two sides of the guard 23 in the thickness direction of the push blade 1 are respectively the first inner side 232 and the second inner side 233, the distance between the first inner side 232 and the second inner side 233 is greater than the thickness of the push blade 1, so as to prevent the push blade 1 from being stuck when it is bent, and the first inner side 232 and the second inner side 233 are both arc surfaces, the middle region of the first inner side 232 is curved away from the second inner side 233, and the middle region of the second inner side 233 is curved away from the first inner side 232.

[0083] Preferably, please refer to Figure 8The curvature of the first inner side surface 232 is adapted to the maximum bending curvature of the section of the push blade 1 located in the guard 23 bending to the right, and the section of the push blade 1 located in the guard 23 bends normally to the right.

[0084] When the distal assembly 4 deflects to the maximum angle to the right relative to the shaft assembly 5, the bending part of the push blade 1 is in contact with the first inner side surface 232, the curvature of the first inner side surface 232 is adapted to the maximum bending curvature of the section of the push blade 1 located in the guard 23 bending to the right, and the section of the push blade 1 located in the guard 23 bends normally to the right.

[0085] For the section of the push blade 1 located in the guard 23 bending normally to the right, it can be understood that, when the distal assembly 4 deflects to the maximum angle to the right relative to the shaft assembly 5 without the guard 23, the push blade 1 will bend, and when the distal assembly 4 deflects to the maximum angle to the right relative to the shaft assembly 5 with the guard 23, the curvature of the bending of the push blade 1 is the same as that without the guard 23, that is, the first inner side surface 232 of the guard 23 does not affect the normal bending of the push blade 1. Similarly, for the section of the push blade 1 located in the guard 23 bending normally to the left, it can be understood that, when the distal assembly 4 deflects to the maximum angle to the left relative to the shaft assembly 5 without the guard 23, the push blade 1 will bend, and when the distal assembly 4 deflects to the maximum angle to the left relative to the shaft assembly 5 with the guard 23, the curvature of the bending of the push blade 1 is the same as that without the guard 23, that is, the second inner side surface 233 of the guard 23 does not affect the normal bending of the push blade 1 to the left.

[0086] The shapes of the first inner side surface 232 and the second inner side surface 233 provided in the embodiment are matched with the shape of the bending of the push blade 1 to protect the bending part of the push blade 1 without affecting the normal bending of the push blade 1 by the guard 23.

[0087] In an embodiment, the first inner side surface 232 is provided with a first chamfer surface at both ends along the length direction of the push blade 1, and the second inner side surface 233 is provided with a second chamfer surface at both ends along the length direction of the push blade 1.

[0088] Please refer to Figure 6 , the length direction of the push blade 1 is along the direction of the X axis in Figure 6 , please refer to Figure 6The two edges of the first inner side surface 232 and the second inner side surface 233 are chamfered.

[0089] Please refer to Figure 8 When the distal assembly 4 is deflected to the maximum angle to the right relative to the shaft assembly 5, at this time, the bending part of the push blade 1 is in contact with the first inner side surface 232 and the chamfer 234 on the second inner side surface 233 avoids the push blade 1; similarly, when the distal assembly 4 is deflected to the maximum angle to the left relative to the shaft assembly 5, at this time, the chamfer 234 on the first inner side surface 232 avoids the push blade 1.

[0090] In this embodiment, the two edges of the first inner side surface 232 and the second inner side surface 233 are chamfered, so that the blade guard 23 does not affect the normal bending of the push blade 1.

[0091] In one embodiment, the blade guard 23 is provided with a gap 2310 for avoiding the pull rod 3 on the side wall of the pull rod 3 in the thickness direction of the push blade 1.

[0092] Please refer to Figure 6 , which shows the gap 2310. Please refer to Figure 4 , which shows the pull rod 3 and the blade guard 23, and the gap 2310 is provided on the blade guard 23 to avoid the pull rod 3.

[0093] Preferably, the gap 2310 is in communication with the insertion hole 231.

[0094] In this embodiment, in order to make the turning joint assembly 2 of the anastomat 100 compact in structure, the gap 2310 is provided on the blade guard 23 to avoid the pull rod 3.

[0095] Regarding the structure of the blade guard 23, in one embodiment, please refer to Figure 9 and Figure 10 The blade guard 23 comprises a first guard part 237 and a second guard part 238, the first guard part 237 is arranged on one side of the second guard part 238 in the width direction of the push blade 1, and the first guard part 237 and the second guard part 238 enclose the insertion hole 231.

[0096] In this embodiment, the blade guard 23 is divided into the first guard part 237 and the second guard part 238, so as to facilitate the processing and manufacturing of the blade guard 23. Preferably, the first guard part 237 and the second guard part 238 are both integrally formed.

[0097] In one embodiment, the first guard part 237 and the second guard part 238 are connected by insertion. By connecting the first guard part 237 and the second guard part 238 by insertion, the assembly of the first guard part 237 and the second guard part 238 can be quickly realized.

[0098] In an embodiment, the first protection part 237 and the second protection part 238 are connected by welding. By welding, the first protection part 237 and the second protection part 238 can be reliably connected.

[0099] Regarding the specific structure of the first protection part 237, in an embodiment, referring to Figure 9 , the first protection part 237 includes a first flat plate 2371, a first left arc-shaped plate 2372, and a first right arc-shaped plate 2373. The first left arc-shaped plate 2372 and the first right arc-shaped plate 2373 are oppositely arranged and are both connected to the first flat plate 2371. The height of the first left arc-shaped plate 2372 to the first flat plate 2371 is greater than the height of the first right arc-shaped plate 2373 to the first flat plate 2371. The middle region of the first right arc-shaped plate 2373 is provided with a notch 2374, one end of which extends to the first flat plate 2371, and the other end extends to the side of the first right arc-shaped plate 2373 away from the first flat plate 2371.

[0100] Referring to Figure 9 , the first right arc-shaped plate 2373 is divided into two parts by the notch 2374; the first left arc-shaped plate 2372 and the first right arc-shaped plate 2373 are both arc-shaped plates as a whole. The side of the first left arc-shaped plate 2372 facing the first right arc-shaped plate 2373 is the first inner side surface 232 of the blade guard 23. The middle region of the first left arc-shaped plate 2372 is curved away from the first right arc-shaped plate 2373. The two ends of the first right arc-shaped plate 2373 are closer to the first left arc-shaped plate 2372 relative to the position of the middle notch 2374.

[0101] Regarding the specific structure of the first protection part 237, referring to Figure 10 , the second protection part 238 includes a second flat plate 2381 and a second right arc-shaped plate 2382. Please refer to Figure 6 , Figure 9 , and Figure 10 , the second flat plate 2381 is arranged opposite to the first flat plate 2371 along the width direction of the push blade 1. The second right arc-shaped plate 2382 is arranged on the side of the second flat plate 2381 facing the first flat plate 2371. There is a gap between the second right arc-shaped plate 2382 and the first right arc-shaped plate 2373 along the width direction of the push blade 1, so as to form the gap 2310. The first left arc-shaped plate 2372 is connected to the side of the second flat plate 2381 facing the first flat plate 2371. The side of the second right arc-shaped plate 2382 facing the first left arc-shaped plate 2372 is used to form the second inner side surface of the blade guard 23.

[0102] Regarding the plug-in connection of the first protection part 237 and the second protection part 238, preferably, referring to Figure 9The first left arc-shaped plate 2372 is provided with a connecting pin 2375 on the side away from the first flat plate 2371, and the second flat plate 2381 is provided with a matching hole, the connecting pin 2375 is inserted into the matching hole, and the connecting pin 2375 is tightly matched with the matching hole, so that the first protection part 237 and the second protection part 238 are fixedly connected.

[0103] Specifically, referring to Figure 9 The first left arc-shaped plate 2372 is provided with two connecting pins 2375 on the side away from the first flat plate 2371, and the second flat plate 2381 is provided with two matching holes, and the connecting pins 2375 are respectively inserted into the corresponding matching holes.

[0104] Please refer to Figure 10 In order to avoid the pull rod 3, a recessed groove can also be arranged on the middle area of the side of the second right arc-shaped plate 2382 away from the second flat plate 2381, and the recessed groove is also used to form the gap 2310.

[0105] The above only describes the preferred embodiment of the present application and is not used to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An anastomosis device, comprising: The push blade (1), the turning joint assembly (2), the distal end assembly (4) and the shaft assembly (5), the turning joint assembly (2) comprises a turning joint (21), a connecting plate assembly (22) and a blade guard (23); The turning joint (21) is connected with the distal end assembly (4), the shaft assembly (5) is connected with the connecting plate assembly (22), and the turning joint (21) is rotatably connected with the connecting plate assembly (22); The blade guard (23) is provided with a insertion hole (231), the push blade (1) passes through the shaft assembly (5) and the insertion hole (231) and is connected with the distal end assembly (4); The distal end of the blade guard (23) is provided with a joint pin shaft (236), and the proximal end of the blade guard (23) is provided with a connecting shaft (235), the joint pin shaft (236) is rotatably connected with the turning joint assembly (2), and the connecting shaft (235) is rotatably connected with the connecting plate assembly (22), wherein the joint pin shaft (236) can also move relative to the turning joint assembly (2) or the connecting shaft (235) can also move relative to the connecting plate assembly (22).

2. The anastomosis device according to claim 1, wherein The insertion hole (231) is provided with a protective layer for reducing friction on at least two inner sides in the thickness direction of the push blade (1).

3. The anastomosis device according to claim 1, wherein The two inner sides of the blade guard (23) in the thickness direction of the push blade (1) are respectively a first inner side (232) and a second inner side (233), the distance between the first inner side (232) and the second inner side (233) is greater than the thickness of the push blade (1), the first inner side (232) and the second inner side (233) are both arc surfaces, the middle region of the first inner side (232) is curved away from the second inner side (233), and the middle region of the second inner side (233) is curved away from the first inner side (232).

4. The anastomosis device according to claim 3, wherein The curvature of the first inner side (232) is adapted to the maximum bending curvature of the section of the push blade (1) located in the blade guard (23) bending to the right, and the curvature of the second inner side (233) is adapted to the maximum bending curvature of the section of the push blade (1) located in the blade guard (23) bending to the left.

5. The anastomosis device as claimed in claim 3, wherein The first inner side (232) is provided with a chamfer (234) at both ends in the length direction of the push blade (1) to form a first chamfer surface; The second inner side (233) is provided with a chamfer (234) at both ends in the length direction of the push blade (1) to form a second chamfer surface.

6. The anastomosis device as claimed in claim 1, wherein The anastomat further comprises a pull rod (3), one end of the pull rod (3) is rotatably connected with the distal end assembly (4), and the blade guard (23) is provided with an opening (2310) for avoiding the pull rod (3) on the side wall close to the pull rod (3) in the thickness direction of the push blade (1).

7. The anastomosis device as claimed in claim 1, wherein The connecting shaft (235) is arranged on the two opposite outer sides of the guard piece (23) along the width direction of the push blade (1), the shaft hole (223) is arranged on the connecting piece assembly (22) and extends along the length direction of the shaft assembly (5), and the connecting shaft (235) is connected with the shaft hole (223) to enable the guard piece (23) to rotate and move relative to the connecting piece assembly (22); or, The joint pin shaft (236) is arranged on the two opposite outer sides of the guard piece (23) along the width direction of the push blade (1), the joint insertion hole (214) is arranged on the turning joint assembly (2) and extends along the length direction of the shaft assembly (5), and the joint pin shaft is connected with the joint insertion hole (214) to enable the guard piece (23) to rotate and move relative to the turning joint assembly (2).

8. The anastomosis device according to any one of claims 1 to 7, wherein The guard piece (23) comprises a first protection part (237) and a second protection part (238), the first protection part (237) and the second protection part (238) are both integral parts, the first protection part (237) and the second protection part (238) are matched with each other, and the first protection part (237) and the second protection part (238) are mutually enclosed to form the insertion hole (231).

9. The anastomosis device according to claim 8, wherein The first protection part (237) and the second protection part (238) are connected through insertion or welding.

10. The anastomosis device as claimed in claim 8, wherein The first protection part (237) comprises a first flat plate (2371), a first left arc-shaped plate (2372) and a first right arc-shaped plate (2373) which are arranged opposite to each other and extend from the first flat plate (2371) in the same direction, the extension distance of the first left arc-shaped plate (2372) is greater than that of the first right arc-shaped plate (2373), a notch (2374) is arranged in the middle region of the first right arc-shaped plate (2373), one end of the notch (2374) extends to the first flat plate (2371) and the other end extends to the side of the first right arc-shaped plate (2373) away from the first flat plate (2371); The second protection part (238) comprises a second flat plate (2381) and a second right arc-shaped plate (2382), when the first protection part (237) is matched with the second protection part (238), the second flat plate (2381) is arranged opposite to the first flat plate (2371) along the width direction of the push blade (1), the second right arc-shaped plate (2382) is arranged on the side of the second flat plate (2381) facing the first flat plate (2371), and a gap exists between the second right arc-shaped plate (2382) and the first right arc-shaped plate (2373) along the width direction of the push blade (1) to form an opening (2310), and the first left arc-shaped plate (2372) is connected with the side of the second flat plate (2381) facing the first flat plate (2371).

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