Anastomat

Abstract

The utility model provides an anastomat. The anastomat comprises a middle connecting piece, an executing end assembly, a first bending and stretching piece and a second bending and stretching piece. The middle connecting piece comprises a first channel and a second channel; the first bending stretching piece penetrates through the first channel to be connected with the execution end assembly; the second bending stretching piece penetrates through the second channel to be connected with the execution end assembly; a first protruding structure is arranged on the side, close to the second channel, of the first channel. When the second bending and stretching piece is stressed to pull the execution end assembly to bend in the second direction, the first bending and stretching piece passively makes contact with the first protruding structure and expands in the first direction to generate additional tensioning force. The situation that the execution end assembly swings due to the fact that the first bending stretching piece is loosened in the operation process is avoided, and pulling or scratching caused to tissue of a patient is reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of medical devices, and in particular to a stapler. Background Art

[0002] Generally speaking, a stapler includes a handle, a bending control mechanism, an execution end assembly, etc. Doctors use the stapler during surgery and use the handle to control the opening or bending of the execution end assembly to achieve anastomosis and cutting of the patient's tissue. The inventors of the present disclosure have found that the bending control mechanism of the existing stapler can cause the execution end assembly to swing when under force during firing, thereby pulling or abrading the patient's tissue, increasing the risk of the surgical process. Utility Model Content

[0003] In order to solve the problems of the prior art, the present disclosure provides a stapler, including an intermediate connecting piece, an execution end assembly, a first bending and stretching piece, and a second bending and stretching piece;

[0004] The intermediate connecting member includes a first channel and a second channel;

[0005] The first bending and stretching member passes through the first channel and is connected to the actuator end assembly;

[0006] The second bending and stretching member passes through the second channel and is connected to the execution end assembly;

[0007] A first protrusion structure is arranged on one side of the first channel close to the second channel;

[0008] When the second bending and stretching member is pulled by force to bend the actuator assembly along the second direction, the first bending and stretching member passively contacts the first protruding structure and expands along the first direction to generate additional tensioning force.

[0009] Optionally, a second protruding structure is provided on a side of the second channel close to the first channel;

[0010] When the first bending and stretching member is pulled by force to bend the actuator assembly along the first direction, the second bending and stretching member passively contacts the second protruding structure and expands along the second direction to generate additional tensioning force.

[0011] Optionally, when the actuator assembly is not bent, the first bending and stretching member contacts the first protruding structure and expands along the first direction to generate additional tensioning force;

[0012] The second curved stretching member contacts the second protruding structure and expands along the second direction to generate additional tension.

[0013] Optionally, the tension force generated by the first bending and stretching member is balanced with the tension force generated by the second bending and stretching member.

[0014] Optionally, the intermediate connecting piece is an integrated structure;

[0015] The first channel or the second channel are each continuous;

[0016] One side of the first channel close to the second channel is integrally constructed as a first convex structure;

[0017] One side of the second channel close to the first channel is integrally constructed as a second convex structure.

[0018] Optionally, the intermediate connecting piece is a multi-piece combined structure;

[0019] The first channel includes a plurality of first sub-channels;

[0020] The second channel includes a plurality of second sub-channels;

[0021] A first protrusion structure is arranged on one side of any first sub-channel close to the second sub-channel;

[0022] A second protruding structure is arranged on a side of any second sub-channel close to the first sub-channel.

[0023] Optionally, when the first bending and stretching member is subjected to a force to pull the actuator assembly to bend along the first direction, the first bending and stretching member is located at a side of the first channel away from the second channel;

[0024] When the second bending and stretching member is pulled by force to bend the actuator assembly along the second direction, the second bending and stretching member is located at a side of the second channel away from the first channel.

[0025] Optionally, when the first bending and stretching member is pulled by force to bend the actuator assembly along the first direction, the deformation of the first bending and stretching member is smaller than the deformation of the second bending and stretching member;

[0026] When the second bending and stretching member is pulled by force to bend the actuator assembly along the second direction, the deformation amount of the second bending and stretching member is smaller than the deformation amount of the first bending and stretching member.

[0027] Optionally, the intermediate connecting member is elastic;

[0028] When the actuator assembly bends along a first direction, the intermediate connecting member is compressed on a side facing the first direction to provide a supporting force, and is stretched on a side facing the second direction;

[0029] When the actuator assembly bends along the second direction, the intermediate connecting member is compressed on the side facing the second direction to provide a supporting force, and is stretched on the side facing the first direction.

[0030] Optionally, the stapler further comprises a handle assembly;

[0031] The handle assembly includes a drive assembly;

[0032] The first bending and stretching member and the second bending and stretching member are respectively connected to the driving assembly;

[0033] The driving assembly can tighten the first bending and stretching member and relax the second bending and stretching member, thereby driving the actuator end assembly to bend along the first direction;

[0034] The driving assembly can tighten the second bending and stretching member and relax the first bending and stretching member, thereby driving the actuator end assembly to bend along the second direction.

[0035] The stapler disclosed in the present invention is designed to provide a first protruding structure on one side of the first curved stretching member channel close to the second curved stretching member channel. The second curved stretching member is tightened when the execution end assembly is bent along the second direction by the force pulling. At the same time, the first curved stretching member passively contacts the first protruding structure and expands along the first direction to generate additional tension. This avoids the situation in which the execution end assembly swings due to the relaxation of the first curved stretching member during the operation, reducing the pulling or abrasion caused to the patient's tissue. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a three-dimensional view of a stapler in one embodiment of the present disclosure.

[0037] Figure 2 It is a three-dimensional view of a stapler in another embodiment of the present disclosure.

[0038] Figure 3 It is a partial stereoscopic view of a stapler in another embodiment of the present disclosure.

[0039] Figure 4 It is a partial top view of the stapler in another embodiment of the present disclosure.

[0040] Figure 5 It is a partial cross-sectional view of a stapler in another embodiment of the present disclosure.

[0041] Figure 6 It is a partial cross-sectional view of a stapler in another embodiment of the present disclosure.

[0042] Figure 7 for Figure 6 Enlarged view of the M part in .

[0043] Figure 8 for Figure 6 Enlarged view of part N in .

[0044] Fig. 9 It is a partial cross-sectional view of a stapler in another embodiment of the present disclosure.

[0045] Fig.10 It is a partial cross-sectional view of a stapler in another embodiment of the present disclosure.

[0046] Fig.11It is a partial schematic diagram of a stapler in another embodiment of the present disclosure.

[0047] Fig.12 It is a partial schematic diagram of a stapler in another embodiment of the present disclosure.

[0048] Reference numerals:

[0049] 1000, stapler; 11, handle assembly; 100, intermediate connector; 111, connector; 112, left wing; 1121, first sub-channel; 113, right wing; 1131, second sub-channel; 120, knife holder channel; 130, first channel; 131, first protruding structure; 132, outer side wall of first channel; 140, second channel; 141, second protruding structure; 142, outer side wall of second channel; 200, actuator assembly; 210, anvil assembly; 220, staple cartridge assembly; 300, connecting tube; 400, first bending and stretching member; 500, second bending and stretching member; 600, hinged structure; 610, first connector; 620, second connector; 630, connecting axis; D1, first direction; D2, second direction; A, third direction; Z, center axis of intermediate connector. DETAILED DESCRIPTION

[0050] For better understanding and implementation, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure.

[0051] In the description of the present disclosure, it should be noted that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "far", "near", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present disclosure.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present disclosure belongs. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure.

[0053] like Figure 1-2As shown, the stapler 1000 includes an execution end assembly 200, a connecting tube 300, a handle assembly 11 and an intermediate connecting member 100. The handle assembly 11, the connecting tube 300, the intermediate connecting member 100 and the execution end assembly 200 are connected in sequence from near to far, and the connecting tube 300 is hinged to the execution end assembly 200. At the same time, the stapler 1000 includes stretching members located on the left and right sides, and the handle assembly 11 includes a driving assembly, one end of the left stretching member is connected to the driving assembly, and the other end is connected to the execution end assembly 200, and one end of the right stretching member is connected to the driving assembly, and the other end is connected to the control end, so that when the driving assembly moves, one of the left stretching member and the right stretching member can be tightened and the other can be loosened, thereby allowing the execution end assembly 200 to bend. In the existing design, when the driving assembly rotates to one side, the left stretching member is tightened, and the right stretching member is loosened at the same time, which will cause the execution end assembly 200 to bend to the left. When the driving assembly rotates to the other side, the right tension member is tightened and the left tension member is relaxed at the same time, so that the execution end assembly 200 turns to the right. Normally, the execution end assembly 200 is a jaw structure, which includes a nail anvil assembly 210, a nail magazine assembly 220, a cutting knife, etc. The execution end assembly 200 can be closed to anastomose and cut the patient's tissue. Figure 1 As shown, the stapler 1000 can be driven and fired by a motor. Figure 2 As shown, stapler 1000 can be fired manually.

[0054] The applicant found that since the left tensile member is a tensioned structure, it will be in a taut state, and since the right tensile member is not tensioned, after the actuator end assembly 200 is bent, the right tensile member will be relatively loose, which will cause the actuator end to swing, causing pulling or abrasion to the patient's tissue.

[0055] like Figure 1-6 As shown, the present disclosure provides a stapler 1000, including an intermediate connector 100, an execution end assembly 200, a first curved stretching member 400, and a second curved stretching member 500. The intermediate connector 100 includes a first channel 130 and a second channel 140; the first curved stretching member 400 passes through the first channel 130 to connect to the execution end assembly 200; the second curved stretching member 500 passes through the second channel 140 to connect to the execution end assembly 200; a first protruding structure 131 is provided on one side of the first channel 130 close to the second channel 140; when the second curved stretching member 500 is pulled by force to bend the execution end assembly 200 along the second direction D2, the first curved stretching member 400 passively contacts the first protruding structure 131, expands along the first direction D1 to generate additional tension.

[0056] It should be noted that the passive contact between the first bending and stretching member 400 and the first protruding structure 131 refers to the passive contact between the first bending and stretching member 400 and the first protruding structure 131 driven by the actuator assembly 200 when the actuator assembly 200 bends along the second direction D2.

[0057] In order to better illustrate the present disclosure, the drawings mark a first direction D1, a second direction D2 and a third direction A. The third direction A points from the proximal end to the distal end, the first direction D1 points from the right side to the left side, and the second direction D2 points from the left side to the right side.

[0058] like Figure 4-9 As shown, the first bending stretching member 400 is located on the left side, and the second bending stretching member 500 is located on the right side. When the second bending stretching member 500 is pulled by force to bend the actuator assembly 200 along the second direction D2 (from left to right), the first bending stretching member 400 passively contacts the first protruding structure 131, so that the first bending stretching member 400 expands along the first direction D1 (from right to left) to generate additional tension.

[0059] In the above solution, the first protrusion structure 131 is provided on the side of the first channel 130 close to the second channel 140, so that the deformation of the first curved stretching member 400 contacting the first protrusion structure 131 increases, so that the first curved stretching member 400 is tightened, thereby avoiding the swing of the actuator end, and reducing the pulling or abrasion caused to the patient's tissue. It should be noted that the second curved stretching member 500 in the above case is always in tension due to the external force.

[0060] In addition, the expansion of the first curved stretching member 400 means that the first curved stretching member 400 will be lifted up by the first protruding structure 131 after contacting the first protruding structure 131, so that the first curved stretching member 400 will be deformed to a greater extent, thereby forming a greater tensioning force.

[0061] Optionally, a second protruding structure 141 is provided on one side of the second channel 140 close to the first channel 130; when the first bending and stretching member 400 is pulled by force to bend the actuator assembly 200 along the first direction D1, the second bending and stretching member 500 passively contacts the second protruding structure 141 and expands along the second direction D2 to generate additional tension.

[0062] It should also be noted that the passive contact between the second bending and stretching member 500 and the second protruding structure 141 refers to the passive contact between the second bending and stretching member 500 and the second protruding structure 141 driven by the actuator assembly 200 when the actuator assembly 200 bends along the first direction D1.

[0063] In the above solution, a second protruding structure 141 is provided on one side of the second channel 140 close to the first channel 130, so that the deformation of the second bending stretching member 500 contacting the second protruding structure 141 increases, so that the second bending stretching member 500 is tightened, thereby avoiding the swing of the actuator end, and reducing the pulling or abrasion caused to the patient's tissue. It should be noted that the first bending stretching member 400 in the above case is always in tension due to the external force.

[0064] like Figure 4-9 As shown, when the first bending and stretching member 400 is pulled by force to bend the actuator assembly 200 along the first direction D1 (from right to left), the second bending and stretching member 500 passively contacts the second protruding structure 141 and expands along the second direction D2 (from left to right) to generate additional tension.

[0065] In addition, the expansion of the second curved stretching member 500 means that the second curved stretching member 500 will be lifted up by the second protruding structure 141 after contacting the second protruding structure 141, so that the second curved stretching member 500 will be deformed to a greater extent, thereby forming a greater tensioning force.

[0066] The above solution provides a first protruding structure 131 on the side of the first channel 130 close to the second channel 140 and a second protruding structure 141 on the side of the second channel 140 close to the first channel 130, so that when the actuator assembly 200 is bent, the first bending stretching member 400 and the second bending stretching member 500 passively contact the first protruding structure 131 and the second protruding structure 141 respectively, generating additional tension. This avoids the situation in which the first bending stretching member 400 or the second bending stretching member 500 is relaxed during the operation, causing the actuator assembly to swing, and reduces the pulling or abrasion caused to the patient's tissue.

[0067] like Figure 4-8 As shown, when the actuator assembly 200 is not bent, the first curved stretching member 400 contacts the first protruding structure 131, expands along the first direction D1 to generate additional tension; the second curved stretching member 500 contacts the second protruding structure 141, expands along the second direction D2 to generate additional tension. This avoids the situation in which the first curved stretching member 400 and the second curved stretching member 500 are relaxed during the operation, causing the actuator assembly 200 to swing when it is not bent, reducing the pulling or abrasion caused to the patient's tissue.

[0068] like Figure 4-9As shown, the tensioning force generated by the first bending stretching member 400 is balanced with the tensioning force generated by the second bending stretching member 500. Specifically, when the second bending stretching member 500 is pulled by force to bend the actuator end assembly 200 along the second direction D2, the first bending stretching member 400 passively contacts the first protruding structure 131, expands along the first direction D1 to generate additional tensioning force. At this time, the tensioning force generated by the first bending stretching member 400 is balanced with the tensioning force generated by the second bending stretching member 500. When the first bending stretching member 400 is pulled by force to bend the actuator end assembly 200 along the first direction D1, the second bending stretching member 500 passively contacts the second protruding structure 141, expands along the second direction D2 to generate additional tensioning force. At this time, the tensioning force generated by the first bending stretching member 400 is balanced with the tensioning force generated by the second bending stretching member 500. When the actuator assembly 200 is not bent, the first bending stretching member 400 contacts the first protruding structure 131, expands along the first direction D1 to generate additional tension; the second bending stretching member 500 contacts the second protruding structure 141, expands along the second direction D2 to generate additional tension. At this time, the tension generated by the first bending stretching member 400 is balanced with the tension generated by the second bending stretching member 500. In this way, the first bending stretching member 400 and the second bending stretching member 500 are in the same tensioned state, avoiding the pulling or abrasion of the patient's tissue caused by the swing of the actuator assembly 200 due to slight external force.

[0069] like Fig.10 As shown, the intermediate connecting member 100 is an integral structure; the first channel 130 or the second channel 140 is respectively continuous; one side of the first channel 130 is integrally constructed as a first protruding structure 131 ; one side of the second channel 140 is integrally constructed as a second protruding structure 141 .

[0070] In the above solution, the intermediate connecting member 100 adopts an integrated structure, which is easy to design and manufacture. One side of the first channel 130 is integrally constructed as a first protruding structure 131, and the contact area between the first protruding structure 131 and the first bending stretching member 400 is enlarged, so that the first bending stretching member 400 can fully expand to generate sufficient additional tension. One side of the second channel 140 is integrally constructed as a second protruding structure 141, and the contact area between the second protruding structure 141 and the second bending stretching member 500 is enlarged, so that the second bending stretching member 500 can fully expand to generate sufficient additional tension.

[0071] like Figure 4-9As shown, the intermediate connecting member 100 is a multi-piece combination structure, wherein the first channel 130 includes multiple sections of first sub-channels 1121; the second channel 140 includes multiple sections of second sub-channels 1131; a first protruding structure 131 is set on the side of any first sub-channel 1121 close to the second sub-channel 1131; and a second protruding structure 141 is set on the side of any second sub-channel 1131 close to the first sub-channel 1121.

[0072] It should be noted that the second subchannel 1131 is located on the right side of the first subchannel 1121, so the side of the first subchannel 1121 close to the second subchannel 1131 can be understood as the right side of the first subchannel 1121. The first subchannel 1121 is located on the left side of the second subchannel 1131, so the side of the second subchannel 1131 close to the first subchannel 1121 can be understood as the left side of the second subchannel 1131. In the above scheme, gaps are left between multiple sections of the first subchannel 1121 to form the first channel 130, and gaps are left between multiple sections of the second subchannel 1131 to form the second channel 140, so that the intermediate connector 100 can cooperate with the actuator assembly 200 to deform when bending.

[0073] It should be noted that in order to better guide the bending of the first bending and stretching member 400 and the second bending and stretching member 500, in some embodiments, the first protruding structure 131 of the first channel 130 is constructed as a partial or full arc surface, and the second protruding structure 141 of the second channel 140 is constructed as a partial or full arc surface.

[0074] Specifically, if Figure 6 As shown, the intermediate connector 100 includes a connecting portion 111 and a plurality of wing portions, wherein the plurality of wing portions are arranged at intervals. It should also be noted that, in some embodiments, the wing portions are a left wing portion 112 and a right wing portion 113, the left wing portion 112 is located on the left side of the connecting portion 111, and the right wing portion 113 is located on the right side of the connecting portion 111, each left wing portion 112 is formed with a respective first sub-channel 1121, each right wing portion is formed with a respective second sub-channel 1131, a plurality of first sub-channels 1121 form a first channel 130, and a plurality of second sub-channels 1131 form a second channel 140, wherein each left wing portion 112 is arranged at intervals, and each right wing portion 113 is arranged at intervals.

[0075] In addition, when the first bending stretching member 400 is pulled by the force to bend the actuator assembly 200 along the first direction D1, it is located on the side of the first channel 130 away from the second channel 140. In this way, the first bending stretching member 400 will not be affected by the first protruding structure 131, so that it is prevented from being further tightened and forming additional tension. Therefore, the tension generated by the first bending stretching member 400 is balanced with the tension generated by the second bending stretching member 500.

[0076] Similarly, when the second bending and stretching member 500 is pulled by the force to bend the actuator assembly 200 along the second direction D2, it is located on the side of the second channel 140 away from the first channel 130. In this way, the second bending and stretching member 500 will not be affected by the second protruding structure 141, so that it is prevented from being further tightened and forming additional tension. Therefore, the tension generated by the first bending and stretching member 400 is balanced with the tension generated by the second bending and stretching member 500.

[0077] Specifically, when the first bending and stretching member 400 is pulled by force to bend the actuator assembly 200 along the first direction D1, since the second bending and stretching member 500 is affected by the second protruding structure 141, while the first bending and stretching member 400 is not affected by the first protruding structure 131, the deformation of the first bending and stretching member 400 is smaller than that of the second bending and stretching member 500. Therefore, the second bending and stretching member 500 expands along the second direction D2 to generate additional tension.

[0078] Similarly, when the second bending stretching member 500 is pulled by force to bend the actuator assembly 200 along the second direction D2, since the first bending stretching member 400 is affected by the first protruding structure 131, and the second bending stretching member 500 is not affected by the second protruding structure 141, the deformation of the second bending stretching member 500 is smaller than that of the first bending stretching member 400. Therefore, the first bending stretching member 400 expands along the first direction D1 to generate additional tension.

[0079] like Fig.11 As shown, it is assumed that the first protruding structure 131 is not provided on the side of the first channel 130 close to the second channel 140 , and the second protruding structure 141 is not provided on the side of the second channel 140 close to the first channel 130 . When the actuator assembly 200 is bent along the first direction D1, the central axis Z of the intermediate connector 100, the first bending and stretching member 400, and the second bending and stretching member 500 are bent around a center of a circle, and the deformation amount of the first bending and stretching member 400 is ΔL1=L0-L1=R*α-(Rd)α=d*α, and the deformation amount of the second bending and stretching member 500 is ΔL2=L2-L0=(R+d)*α-Rα=d*α, wherein α is the center angle of the circle, L1 and L2 are the lengths of the first bending and stretching member 400 and the second bending and stretching member 500 within the same center angle range, L0 is the length of the central axis Z of the intermediate connector 100, R is the distance between the central axis Z of the intermediate connector 100 and the center of the circle, and d is the distance between the first bending and stretching member 400 or the second bending and stretching member 500 and the central axis Z of the intermediate connector 100. Obviously, the deformation amounts of the first bending and stretching member 400 and the second bending and stretching member 500 are consistent.

[0080] Now, a first protruding structure 131 is provided on a side of the first channel 130 close to the second channel 140, and a second protruding structure 141 is provided on a side of the second channel 140 close to the first channel 130. When the actuator assembly 200 is bent along the first direction D1, the central axis Z of the intermediate connecting member 100, the first bending and stretching member 400, and the second bending and stretching member 500 are no longer bent around a center of a circle, and the arc of the second bending and stretching member 500 will shift outward, thereby making ΔL2>ΔL1. As a result, the deformation of the second bending and stretching member 500 is greater than the deformation of the first bending and stretching member 400. On the contrary, when the actuator assembly 200 is bent along the second direction D2, the deformation of the first bending and stretching member 400 is greater than the deformation of the second bending and stretching member 500.

[0081] Specifically, the outer side wall 132 (i.e., the left side wall) of the first channel 130 is a flat wall, and the outer side wall 142 (i.e., the right side wall) of the second channel 140 is a flat wall. When the intermediate connecting member 100 is in a normal state, the outer side wall 132 of the first channel 130 is parallel to the outer side of the first curved stretching member 400, and the outer side wall 142 of the second channel 140 is parallel to the outer side of the second curved stretching member 500. In this way, when the first curved stretching member 400 is bent and abuts against the outer side wall 132 of the first channel 130 or the second curved stretching member 500 is bent and abuts against the outer side wall 142 of the second channel 140, the first curved stretching member 400 and the second curved stretching member 500 will not be further tightened to generate additional tension.

[0082] like Fig. 9 As shown, when the actuator assembly 200 turns to the left, the first bending stretching member 400 and the second bending stretching member 500 will bend to the left. The first protruding structure 131 of the first channel 130 is located on the right side of the first channel 130, the outer side wall 132 of the first channel 130 is located on the left side of the first channel 130, the outer side wall 142 of the second channel 140 is located on the right side of the second channel 140, and the second protruding structure 141 of the second channel 140 is located on the left side of the second channel 140. At this time, the first bending stretching member 400 abuts against the outer side wall 132 of the first channel 130, and the second bending stretching member 500 contacts the second protruding structure 141 on the inner side of the second channel 140. Since the outer side wall 132 of the first channel 130 is a flat wall, the first bending stretching member 400 will not be further tightened. The second protruding structure 141 on the inner side of the second channel 140 protrudes outward, so that the second bending stretching member 500 generates additional tension.

[0083] It should be noted that the actuator assembly 200 is not bent, and the intermediate connection member 100 extends substantially straight. When the actuator assembly 200 is bent, the intermediate connection member 100 will bend to one side.

[0084] Optionally, the intermediate connector 100 is elastic; when the actuator assembly 200 bends along the first direction D1, the intermediate connector 100 is compressed on the side facing the first direction D1 to provide support force, and stretched on the side facing the second direction D2; when the actuator assembly 200 bends along the second direction D2, the intermediate connector 100 is compressed on the side facing the second direction D2 to provide support force, and stretched on the side facing the first direction D1. In this way, the intermediate connector 100 supports the actuator assembly 200 to prevent the actuator assembly 200 from swinging due to resistance when bending. At the same time, when the actuator assembly 200 bends, the elastic intermediate connector 100 is easy to bend.

[0085] Generally, the intermediate connecting member 100 is formed with a tool holder channel 120 , and the tool holder channel 120 is mainly used to allow the tool holder to pass through and limit the position of the tool holder.

[0086] Optionally, the connecting tube 300 and the actuator assembly 200 are hingedly connected to each other via a hinge structure 600. Figure 3 As shown, the hinge structure 600 includes a first connecting member 610, a second connecting member 620 and a connecting shaft 630. The first connecting member 610 is installed on the actuator assembly 200, and the second connecting member 620 is installed on the connecting pipe 300. The first connecting member 610 and the second connecting member 620 are hingedly connected through the connecting shaft 630. The above scheme enables the bending of the actuator assembly 200 to move according to a preset trajectory.

[0087] In summary, the stapler disclosed in the present invention includes an intermediate connector, an execution end assembly, a first curved stretching member, and a second curved stretching member; the intermediate connector includes a first channel and a second channel; the first curved stretching member passes through the first channel to connect to the execution end assembly; the second curved stretching member passes through the second channel to connect to the execution end assembly; a first protruding structure is provided on one side of the first channel close to the second channel; when the second curved stretching member is forced to pull the execution end assembly to bend along the second direction, the first curved stretching member passively contacts the first protruding structure, expands along the first direction to generate additional tension. The present invention avoids the situation in which the first curved stretching member is relaxed during surgery, causing the execution end assembly to swing, thereby reducing the pulling or abrasion caused to the patient's tissue.

[0088] When expressing the position in this article, the position is generally referred to as the doctor or patient operating the medical device. The position close to the doctor operating the medical device is the "proximal end", and the position close to the patient of the medical device is the "distal end". Furthermore, the length direction of the stapler is referred to as the axial direction in this article.

[0089] The technical means disclosed in the present disclosure are not limited to the technical means disclosed in the above-mentioned implementation modes, but also include technical solutions composed of any combination of the above-mentioned technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present disclosure, and these improvements and modifications are also regarded as the protection scope of the present disclosure.

Claims

1. A stapler, characterized in that: It comprises an intermediate connecting member (100), an execution end assembly (200), a first bending and stretching member (400) and a second bending and stretching member (500); The intermediate connecting member (100) comprises a first channel (130) and a second channel (140); The first bending and stretching member (400) passes through the first channel (130) and is connected to the actuator assembly (200); The second bending and stretching member (500) passes through the second channel (140) and is connected to the actuator assembly (200); A first protruding structure (131) is disposed on a side of the first channel (130) close to the second channel (140); When the second bending and stretching member (500) is pulled by force to bend the actuator assembly (200) along the second direction (D2), the first bending and stretching member (400) passively contacts the first protruding structure (131) and expands along the first direction (D1) to generate additional tensioning force.

2. The stapler according to claim 1, characterized in that: A second protruding structure (141) is provided on a side of the second channel (140) close to the first channel (130); When the first bending and stretching member (400) is pulled by force to bend the actuator assembly (200) along the first direction (D1), the second bending and stretching member (500) passively contacts the second protruding structure (141) and expands along the second direction (D2) to generate additional tensioning force.

3. The stapler according to claim 2, characterized in that: When the actuator assembly (200) is not bent, the first bending and stretching member (400) contacts the first protruding structure (131) and expands along the first direction (D1) to generate additional tensioning force; The second curved stretching member (500) contacts the second protruding structure (141) and expands along the second direction (D2) to generate additional tensioning force.

4. The stapler according to claim 1 or 3, characterized in that: The tension force generated by the first bending and stretching member (400) is balanced with the tension force generated by the second bending and stretching member (500).

5. The stapler according to claim 2, characterized in that: The intermediate connecting member (100) is an integrated structure; The first channel (130) or the second channel (140) are each continuous; A side of the first channel (130) close to the second channel (140) is integrally configured as the first protruding structure (131); A side of the second channel (140) close to the first channel (130) is integrally constructed as the second protruding structure (141).

6. The stapler according to claim 2, characterized in that: The intermediate connecting piece (100) is a multi-piece combined structure; The first channel (130) includes a plurality of first sub-channels (1121); The second channel (140) includes a plurality of second sub-channels (1131); The first protruding structure (131) is disposed on a side of any one of the first sub-channels (1121) close to the second sub-channel (1131); The second protruding structure (141) is disposed on a side of any one of the second sub-channels (1131) close to the first sub-channel (1121).

7. The stapler according to claim 2, characterized in that: When the first bending and stretching member (400) is subjected to a force to pull the actuator assembly (200) to bend along the first direction (D1), the first bending and stretching member (400) is located on a side of the first channel (130) away from the second channel (140); When the second bending and stretching member (500) is subjected to a force to pull the actuator assembly (200) to bend along the second direction (D2), it is located on a side of the second channel (140) away from the first channel (130).

8. The stapler according to claim 2, characterized in that: When the first bending and stretching member (400) is subjected to force to pull the actuator end assembly (200) to bend along the first direction (D1), the deformation amount of the first bending and stretching member (400) is smaller than the deformation amount of the second bending and stretching member (500); When the second bending and stretching member (500) is subjected to force to pull the actuator end assembly (200) to bend along the second direction (D2), the deformation of the second bending and stretching member (500) is smaller than the deformation of the first bending and stretching member (400).

9. The stapler according to claim 2, characterized in that: The intermediate connecting member (100) is elastic; When the actuator assembly (200) bends along the first direction (D1), the intermediate connecting member (100) is compressed on the side facing the first direction (D1) to provide a supporting force, and is stretched on the side facing the second direction (D2); When the actuator assembly (200) bends along the second direction (D2), the intermediate connecting member (100) is compressed on the side facing the second direction (D2) to provide a supporting force, and is stretched on the side facing the first direction (D1).

10. The stapler according to claim 2, characterized in that: Also includes a handle assembly (11); The handle assembly (11) comprises a drive assembly; The first bending and stretching member (400) and the second bending and stretching member (500) are respectively connected to the driving assembly; The driving assembly can tighten the first bending and stretching member (400) and relax the second bending and stretching member (500), thereby driving the actuator end assembly (200) to bend along the first direction (D1); The driving assembly can tighten the second bending and stretching member (500) and relax the first bending and stretching member (400), thereby driving the actuator end assembly (200) to bend along the second direction (D2).

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