Surgical instrument for endoscope

Abstract

The utility model discloses a surgical instrument for an endoscope, and belongs to the technical field of medical instruments.According to the surgical instrument for the endoscope, a rotating piece capable of rotating relative to a sliding block is arranged on the sliding block, and the first end of an inhaul cable is connected with the rotating piece, so that when the rotating piece rotates, the inhaul cable can be driven to rotate; and the execution piece connected to the second end of the pull rope is driven to rotate through the pull rope. According to the surgical instrument for the endoscope, the rotating part and the inhaul cable are fixedly connected, the inhaul cable is directly rotated through the rotating part, the executing part is driven to rotate, the structure is simple, the manufacturing difficulty of the instrument is lowered, and the machining cost is reduced.

Description

Technical Field

[0001] This application belongs to the field of medical device technology, specifically relating to an endoscopic surgical instrument. Background Technology

[0002] A snare is a medical device primarily used in endoscopic surgery. It is inserted into the body through the endoscope and its movement is controlled by an operating handle or lever. Snares are frequently used in procedures such as colonoscopy, gastroscopy, cystoscopy, and arthroscopy. However, current snare designs have problems. During the snare-taking process, a rotating positioning cap is usually required to drive the rotation of the push tube, which in turn rotates the snare. This design relies on the non-circular characteristics of the push tube and positioning cap, leading to manufacturing difficulties and hindering production processes. Utility Model Content

[0003] Purpose of the utility model: The embodiments of this application provide an endoscopic surgical instrument, which aims to solve the technical problem that the current reliance on the non-circular features of the booster tube and positioning cap to achieve rotation leads to high manufacturing difficulty.

[0004] Technical solution: An endoscopic surgical instrument according to an embodiment of this application includes:

[0005] A handle mechanism includes a core rod, a slider, and a rotating component. The slider is disposed on the core rod and is movable relative to the core rod along its length. The rotating component is disposed on the slider and is configured to rotate relative to the slider.

[0006] A cable is threaded through the core rod, the cable having a first end and a second end opposite to each other, the first end being connected to the rotating member;

[0007] An actuator is connected to the second end; when the rotating member rotates relative to the slider, it can drive the actuator to rotate.

[0008] In some embodiments, the slider is sleeved on the core rod, the rotating member is disposed on the side of the slider away from the core rod, and the cable passes through the slider to connect with the rotating member.

[0009] In some embodiments, the slider includes an assembly structure having a rotation guide portion;

[0010] The rotating component is provided with a rotating sliding part, which is connected to the rotating guide part so that the rotating component can rotate relative to the assembly structure.

[0011] In some embodiments, the core rod is provided with a first clearance groove extending along the length direction, and the cable passes through the first clearance groove; the assembly structure further provides an assembly cavity communicating with the first clearance groove; the rotating component includes:

[0012] The main structure is fitted onto the assembly structure, and the rotating sliding part is disposed on the main structure;

[0013] A cable-through structure is connected within the main structure and disposed in the assembly cavity. The cable-through structure has a cable-through channel and a limiting groove. The limiting groove is disposed on the side of the cable-through channel away from the core rod. The cable passes through the cable-through channel, and the first end is disposed in the limiting groove.

[0014] The limiting structure is fixed in the limiting groove and connected to the first end.

[0015] In some embodiments, the rotating component further includes:

[0016] A sealing structure is connected to the main structure and seals the limiting groove.

[0017] In some embodiments, the rotating member has a rotation axis, the rotating member is rotatable relative to the slider about the rotation axis, and the rotation axis intersects the length direction.

[0018] In some embodiments, the axis of rotation has an angle α with the length direction, satisfying: α≤90°.

[0019] In some embodiments, the endoscopic surgical instruments further include:

[0020] A booster tube is inserted through the core rod and has a first clearance hole. The booster tube is configured to move relative to the core rod along the length direction following the slider.

[0021] The cable passes through the booster tube and through the first clearance hole.

[0022] In some embodiments, the cable is configured to contact the push tube when tensioned; the endoscopic surgical instrument further includes:

[0023] A conductive plug is disposed on the slider and connected to the booster tube.

[0024] In some embodiments, the cable includes:

[0025] The main body section is inserted through the booster tube;

[0026] A connecting section is attached to the rotating component;

[0027] A transition section is disposed between the body section and the connecting section, and is connected to both the body section and the connecting section respectively. The transition section and the body section have an included angle β.

[0028] The end of the connecting segment furthest from the transition segment is the first end, and the end of the body segment furthest from the transition segment is the second end.

[0029] In some embodiments, the core rod is provided with a first clearance groove and a second clearance groove extending along the length direction, the cable passes through the first clearance groove, the second clearance groove and the first clearance groove are arranged in the circumferential direction of the core rod, and the conductive plug passes through the second clearance groove.

[0030] In some embodiments, the slider is provided with a receiving channel, the receiving channel being positioned corresponding to the second clearance groove, and the conductive plug passing through the receiving channel;

[0031] The extending direction of the receiving channel intersects the extending direction of the rotation axis of the rotating component and the length direction, respectively.

[0032] In some embodiments, the actuator includes a collar.

[0033] Beneficial Effects: An endoscopic surgical instrument provided in this application includes: a handle mechanism comprising a core rod, a slider, and a rotating component. The slider is disposed on the core rod and is movable relative to the core rod along its length. The rotating component is disposed on the slider and is rotatable relative to the slider. A cable passes through the core rod and has a first end and a second end opposite to each other. The first end is connected to the rotating component. An actuator is connected to the second end. When the rotating component rotates relative to the slider, it can drive the actuator to rotate. In this application, by providing a rotating component that can rotate relative to the slider and connecting the first end of the cable to the rotating component, the rotation of the rotating component can drive the cable to rotate, thereby driving the actuator connected to its second end to rotate. This endoscopic surgical instrument uses a fixed connection between the rotating component and the cable, directly utilizing the rotating component to rotate the cable, thereby driving the actuator to rotate. The structure is simple, reducing the manufacturing difficulty and processing cost of the instrument. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1Schematic diagrams of the structure of endoscopic surgical instruments provided in some embodiments of this application;

[0036] Figure 2 Endoscopic surgical instruments provided in some embodiments of this application along Figure 1 Schematic diagram of the cross-sectional structure along line AA;

[0037] Figure 3 for Figure 2 A magnified schematic diagram of a portion of region A in the middle;

[0038] Figure 4 for Figure 2 A magnified schematic diagram of a portion of region A in the middle;

[0039] Figure 5 for Figure 2 A magnified schematic diagram of a portion of region A in the middle;

[0040] Figure 6 A schematic diagram illustrating the mating structure of a rotating component, a pull cable, a push tube, and a conductive plug in an endoscopic surgical instrument provided in some embodiments of this application;

[0041] Reference numerals: 100-Handle mechanism; 110-Core rod; 111-First clearance groove; 112-Second clearance groove; 120-Slider; 121-Assembly structure; 1211-Rotation guide; 1212-Assembly cavity; 122-Accommodation channel; 123-Clearing notch; 130-Rotating component; 131-Rotation sliding part; 132-Main structure; 133-Cable threading structure; 1331-Cable threading channel; 13 32-Limiting groove; 134-Limiting structure; 135-Sealing structure; 140-Positioning cap; 200-Pull cable; 201-First end; 202-Second end; 210-Body section; 220-Connecting section; 230-Transition section; 300-Actuator; 310-Loop ring; 400-Boosting tube; 410-First clearance hole; 500-Conductive plug; 600-Outer tube; X-Length direction; O-Rotation axis. Detailed Implementation

[0042] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0043] In the description of this application, it should be understood that the terms "proximal" and "distal" are used with the surgeon (physician) as the reference point. "Proximal" refers to the end of the surgical instrument closer to the surgeon, and "distal" refers to the end further away from the surgeon relative to the "proximal," i.e., closer to the patient. The terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or apparatus referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. "Multiple" means two or more, and "at least one" can mean one, two, or more, unless otherwise explicitly specified. The terms "installed," "connected," and "linked" should be interpreted broadly, for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two devices or the interaction between two devices, unless otherwise explicitly specified. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0044] In the description of this application, the length direction is introduced to facilitate the explanation of the relative positional relationships between the components of the endoscopic surgical instrument. The length direction is the extension direction of the core rod 110 in the handle mechanism 100 of the endoscopic surgical instrument, and also the direction in which the slider 120 can move relative to the core rod 110. In the accompanying drawings of this application, the length direction X is indicated by an arrow marked X, which can be the direction from the proximal end of the handle mechanism to the distal end of the handle mechanism.

[0045] As an introduction to this application, a snare structure is introduced. The snare structure mainly comprises a slider, a core rod, a conductive plug, a positioning cap, a booster tube, a cable, and a snare. The booster tube is fixedly connected to the cable and is non-circular in shape. The booster tube can slide within the positioning cap, and the hole in the positioning cap through which the booster tube passes is also non-circular. Rotating the positioning cap causes the booster tube to rotate, thus rotating the snare. Since the rotation of the snare relies on the non-circular characteristics of the booster tube and the positioning cap, the manufacturing process for the non-circular booster tube is difficult and costly. Furthermore, the movement of the booster tube relative to the core rod can lead to separation from the conductive plug, potentially resulting in poor conductivity.

[0046] In view of this, this application provides an endoscopic surgical instrument that rotates via a direct rotating cable, eliminating the need for a propulsion tube to drive the rotation. This eliminates the need for non-circular machining of the propulsion tube and positioning cap, significantly reducing manufacturing difficulty. It is understood that this endoscopic surgical instrument can be a snare product, or other endoscopic surgical instruments such as stone retrieval baskets, hemostatic clips, and stone retrieval balloons.

[0047] Please refer to the following: Figure 1 , Figure 2 and Figure 3 An endoscopic surgical instrument provided in this application includes a handle mechanism 100, a cable 200, and an actuator 300.

[0048] The handle mechanism 100 is the main component that the surgeon holds and uses to perform surgical operations during the procedure. The handle mechanism 100 includes a core rod 110, a slider 120, and a rotating member 130. The slider 120 is mounted on the core rod 110 and is movable relative to the core rod 110 along its length direction X. The rotating member 130 is mounted on the slider 120 and is configured to rotate relative to the slider 120.

[0049] The cable 200 is a component that connects the handle mechanism 100 and the actuator 300, transmitting motion and force. The doctor's operation control of the handle mechanism 100 is transmitted to the actuator 300 via the cable 200, causing the actuator 300 to perform actions according to the doctor's operation. The cable 200 passes through the core rod 110, with one end being its first end 201 and the corresponding other end being its second end 202. Its first end 201 is connected to the rotating component 130, and its second end 202 is connected to the actuator 300.

[0050] The actuator 300 is a component of the surgical instrument used to perform surgical procedures directly on the affected area. In different embodiments, the actuator 300 can be different actuating structures; for example, when the endoscopic surgical instrument is a snare, the actuator 300 is a snare 310. In other embodiments, the actuator 300 can also be a basket, a balloon, a hemostatic clamp, etc.

[0051] It is understood that in the endoscopic surgical instrument of this application embodiment, by providing a rotating member 130 that can rotate relative to the slider 120, and connecting the first end 201 of the cable 200 to the rotating member 130, the rotation of the rotating member 130 can drive the cable 200 to rotate, thereby driving the actuator 300 connected to its second end 202 to rotate. This endoscopic surgical instrument adopts a fixed connection between the rotating member 130 and the cable 200, directly using the rotating member 130 to rotate the cable 200, thereby driving the actuator 300 to rotate. The structure is simple, reducing the manufacturing difficulty of the instrument and reducing the processing cost.

[0052] In some embodiments, the core rod 110 is provided with a first clearance groove 111 extending along its length direction X, and the cable 200 passes through the first clearance groove 111. By providing the first clearance groove 111 extending along its length direction X on the core rod 110 and providing the cable 200 through the first clearance groove 111, when the slider 120 moves relative to the core rod 110 along the length direction X, it can also drive the cable 200 to move along the first clearance groove 111, thereby driving the actuator 300.

[0053] Specifically, the core rod 110 has an internal channel, and the portion of the cable 200 near the proximal end of the surgical instrument passes through the internal channel of the core rod 110 and exits from the first clearance groove 111, so that its first end 201 can be connected to the rotating member 130 provided on the slider 120. A positioning cap 140 is provided at the distal end of the core rod 110, through which the surgical instrument abuts against the jaw protrusion of the endoscope. An outer tube 600 is also connected to the distal end of the core rod 110, and the outer tube 600 can enter the patient's body through the jaws of the endoscope. A portion of the cable 200 passes through the outer tube 600, and its second end 202 is connected to the actuator 300.

[0054] Please combine them together Figure 2 and Figure 3 In some embodiments, the slider 120 is sleeved on the core rod 110, meaning the slider 120 has an assembly channel through which the core rod 110 passes, allowing the slider 120 to slide relative to the core rod 110 during operation. A rotating member 130 is located on the side of the slider 120 away from the core rod 110, meaning the core rod 110 is located inside the slider 120, and the rotating member 130 is located outside the slider 120. A cable 200 passes through the slider 120 to connect with the rotating member 130. Optionally, a clearance notch 123 is provided on the slider 120, the position of which approximately corresponds to the position of the first clearance groove 111. The cable 200 passes through the slider 120 via the clearance notch 123 and connects to the rotating member 130 mounted on the outside of the slider 120.

[0055] Please refer to the following: Figure 3 and Figure 5 In some embodiments, the slider 120 includes an assembly structure 121, which has a rotation guide portion 1211. The assembly structure 121 is a structure on the slider 120 for mounting the rotating component 130, and the rotation guide portion 1211 is provided thereon so that the rotating component 130 can be mounted on the assembly structure 121 and can rotate relative to the assembly structure 121. Correspondingly, the rotating component 130 has a rotation sliding portion 131, which is connected to the rotation guide portion 1211 to allow the rotating component 130 to rotate relative to the assembly structure 121. Optionally, one of the rotation guide portion 1211 and the rotation sliding portion 131 is a groove structure arranged around the rotation axis O, and the other is a boss structure arranged around the rotation axis O. By embedding the boss structure within the groove structure, the rotating component 130 can rotate relative to the assembly structure 121 around the rotation axis O, thereby causing the connected cable 200 to rotate as well.

[0056] Please combine them together Figure 3 and Figure 4 In some embodiments, the assembly structure 121 further includes an assembly cavity 1212 communicating with the first clearance groove 111. Specifically, the assembly cavity 1212 corresponds to the clearance notch 123 provided on the slider 120, and the assembly cavity 1212 communicates with the first clearance groove 111 through the clearance notch 123. The rotating component 130 includes a main body structure 132, a cable-through structure 133, and a limiting structure 134. The main body structure 132 is sleeved on the assembly structure 121, and the rotating sliding part 131 is disposed on the main body structure 132. By twisting the main body structure 132, it can be rotated relative to the assembly structure 121. Optionally, the outer peripheral surface of the main body structure 132 can be set as a rough surface or have other textures that can increase friction to facilitate the doctor to twist the main body structure 132. The cable-through structure 133 is disposed inside the main body structure 132 and connected to the main body structure 132. A cable-passing structure 133 is disposed in the assembly cavity 1212, and has a cable-passing channel 1331 and a limiting groove 1332 thereon. The limiting groove 1332 is disposed on the side of the cable-passing channel 1331 away from the core rod 110. Thus, after the cable 200 passes through the first clearance groove 111 of the core rod 110, it can enter the assembly cavity 1212 through the clearance notch 123 and pass through the cable-passing channel 1331, with its first end 201 disposed in the limiting groove 1332. The limiting structure 134 is fixed in the limiting groove 1332 and connected to the first end 201, thereby fixing the cable 200 to the cable-passing structure 133.

[0057] Understandably, when the main structure 132 is screwed, the main structure 132 drives the cable-through structure 133 connected to its inner side to rotate. The cable-through structure 133 can drive the limiting structure 134 and the cable 200 to rotate together. Furthermore, since the cable-through structure 133 is located inside the assembly cavity 1212, the offset of the cable 200 located in its internal cable-through channel 1331 from the rotation axis O is smaller when it rotates, resulting in less rotational resistance of the cable 200. The cable 200 is more easily driven to rotate by the cable-through structure 133 and the limiting structure 134.

[0058] Please refer to it again. Figure 3 In some embodiments, the rotating component 130 further includes a cover structure 135, which is connected to the main body structure 132 and covers the limiting groove 1332. Optionally, the cover structure 135 is disposed inside the main body structure 132 and located on the side of the cable-threading structure 133 away from the slider 120, to cover the limiting groove 1332. By providing the cover structure 135, the assembly of the cable 200 and the rotating component 130 can be facilitated. Furthermore, please refer to... Figure 1 Markings can be placed on the cap structure to indicate the direction of rotation, making it easier for doctors to operate.

[0059] Please refer to it again. Figure 5 In some embodiments, the rotating member 130 has a rotation axis O, and the rotating member 130 is rotatable relative to the slider 120 about the rotation axis O, the rotation axis O intersecting the length direction X. This arrangement ensures that manipulating the rotation of the rotating member 130 and manipulating the movement of the slider 120 relative to the core rod 110 along the length direction X do not interfere with each other, thus improving the operational stability of the surgical instrument.

[0060] In some embodiments, the rotation axis O and the length direction X have an angle α that satisfies: α ≤ 90°. For example, the angle α can be any angle value among 90°, 85°, 80°, 75°, 70°, 65°, and 60°, or a range between any two angle values. A smaller angle α reduces the rotational resistance of the cable 200, making it easier to rotate the cable 200 when the rotating component 130 is rotated, thus making operation more convenient.

[0061] Please see Figure 4In some embodiments, the endoscopic surgical instrument further includes a push tube 400, which passes through the core rod 110 and has a first clearance hole 410. The push tube 400 is configured to move relative to the core rod 110 along the length direction X following the slider 120. A cable 200 passes through the push tube 400 and through the first clearance hole 410. By providing the push tube 400, when manipulating the slider 120 to move relative to the core rod 110, the characteristics of the push tube 400 moving along with it and the cable 200 passing through the push tube 400 facilitate the smooth movement of the cable 200 along with the slider 120 and the push tube 400, thereby improving the stability of the drive of the actuator 300.

[0062] Please refer to the following: Figure 4 , Figure 5 and Figure 6 In some embodiments, the pull cable 200 is configured to contact the push tube 400 when tensioned. Furthermore, the endoscopic surgical instrument also includes a conductive plug 500, which is disposed on the slider 120 and connected to the push tube 400. By connecting the conductive plug 500 to the push tube 400, when the actuator 300 is the collar 310 and an electric cutting function is required, the conductive plug 500 is connected to the high-frequency generator, and current flows through the conductive plug 500 and into the connected push tube 400. Because the pull cable 200 is tensioned during electric cutting, it maintains constant contact with the push tube 400, thus the current can be stably transmitted from the push tube 400 to the pull cable 200, and then from the pull cable 200 to the collar 310, achieving electrocautery resection of tissue.

[0063] Please refer to it again. Figure 4 and Figure 5 In some embodiments, the cable 200 includes a body section 210, a connecting section 220, and a transition section 230. The body section 210 passes through the booster tube 400, the connecting section 220 is connected to the rotating member 130, and the transition section 230 is disposed between the body section 210 and the connecting section 220, and is connected to both the body section 210 and the connecting section 220. The end of the connecting section 220 away from the transition section 230 is designated as the first end 201, and the end of the body section 210 away from the transition section 230 is designated as the second end 202. The transition section 230 and the body section 210 have an included angle β, meaning the transition section 230 is inclined relative to the body section 210. This allows the cable 200 to maintain more stable contact with the booster tube 400 when tensioned, ensuring stable current conduction.

[0064] Optionally, at least a portion of the connecting segment 220 extends along the rotation axis O of the rotating member 130, so that when the rotating member 130 rotates, its rotational force can be more fully transmitted to the connecting segment 220, thereby enabling the cable 200 to rotate more stably with the rotating member 130.

[0065] Please refer to it again. Figure 1 and Figure 3 In some embodiments, the core rod 110 is provided with a second clearance groove 112 extending along the length direction X. The second clearance groove 112 is spaced apart from the first clearance groove 111 and arranged circumferentially along the core rod 110. The conductive plug 500 passes through the second clearance groove 112. Therefore, when the slider 120 moves relative to the core rod 110 in the length direction X, it can drive the conductive plug 500 to move along the second clearance groove 112, ensuring that the conductive plug 500 remains connected to the push tube 400 and drives the push tube 400 to move relative to the core rod 110. This allows the cable 200, the push tube 400, and the conductive plug 500 to move synchronously and stably with the slider 120, improving the accuracy of the surgical operation. Specifically, Figure 3 The channel extending in the left and right direction where the conductive plug 500 is located is the second clearance groove 112, which penetrates the core rod 110 radially.

[0066] Optionally, the slider 120 is provided with a receiving channel 122, which corresponds to the position of the second clearance groove 112. The conductive plug 500 passes through the receiving channel 122, and the extending direction of the receiving channel 122 intersects the extending direction of the rotation axis O and the length direction X of the rotating member 130, respectively. That is, the conductive plug 500 and the rotating member 130 are located on different sides of the slider 120 to avoid spatial interference between them and improve the convenience of operation for doctors.

[0067] Optionally, the conductive plug 500 can also be located on the same side of the rotating member 130. When the slider 120 moves, the conductive plug 500 can also move using the first clearance groove 111. This arrangement eliminates the need for a second clearance groove 112, thereby improving the overall structural rigidity of the handle mechanism 100.

[0068] In some embodiments, the first clearance groove 111 may not be provided, and the second clearance groove 112 passes through the core rod 110 radially. The rotating member 130 can be provided on the side opposite to the conductive plug 500, and the cable 200 passes through the second clearance groove 112 and connects to the rotating member 130.

[0069] In some embodiments, when the endoscopic surgical instrument is used for cold tissue resection, the aforementioned conductive plug 500 may not be required, further reducing the complexity of the structure and lowering the processing difficulty and cost.

[0070] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0071] The endoscopic surgical instruments provided in the embodiments of this application have been described in detail above, and specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A surgical instrument for an endoscope, characterized by comprising: The utility model relates to an endoscope surgical instrument, including: Handle mechanism, including core stem, slider and rotating piece, the slider sets up on the core stem, and can move along the length direction of the core stem relative to the core stem, the rotating piece sets up on slider, the rotating piece sets up can rotate relative to the slider; Cable, is arranged in the core stem, the cable has opposite first end and second end, the first end is connected with the rotating piece; Execution spare, is connected with the second end;In the case where the rotating piece rotates relative to the slider, can drive the execution spare rotates.

2. The surgical instrument for endoscope according to claim 1, characterized by The slider is sleeved on the core stem, the rotating piece is arranged on the slider side away from the core stem, the cable is threaded through the slider to be connected with the rotating piece.

3. The surgical instrument for endoscope according to claim 1, characterized by The slider includes assembly structure, and the assembly structure is provided with rotating guide portion; The rotating piece is provided with rotating sliding portion, and the rotating sliding portion is connected with the rotating guide portion to make the rotating piece rotate relative to the assembly structure.

4. The surgical instrument for endoscope according to claim 3, characterized by The core stem is provided with the first avoiding slot extending along the length direction, and the cable is threaded through the first avoiding slot; The assembly structure is further provided with assembly cavity communicated with the first avoiding slot;The rotating piece includes: Main body structure, is sleeved on the assembly structure, and the rotating sliding portion is arranged on the main body structure; Through the structure, is connected in the main body structure and is arranged in the assembly cavity, the through structure is provided with through channel and limiting groove, the limiting groove is arranged on the through channel side away from the core stem, the cable is threaded through the through channel, and the first end is arranged in the limiting groove; Limiting structure, is fixed in the limiting groove, and is connected with the first end.

5. The surgical instrument for endoscope according to claim 4, characterized by The rotating piece further includes: Cover sealing structure, is connected with the main body structure, and covers the limiting groove.

6. The surgical instrument according to claim 1, wherein The rotating piece has a rotation axis, and the rotating piece can rotate relative to the slider around the rotation axis, and the rotation axis intersects the length direction.

7. The surgical instrument for endoscope according to claim 6, characterized by The rotation axis and the length direction have an included angle alpha, and alpha is less than or equal to 90 degrees.

8. The surgical instrument for endoscope according to claim 1, characterized by The endoscope surgical instrument further includes: Boosting pipe, is arranged in the core stem, and is provided with the first avoiding hole, the boosting pipe is arranged to be able to follow the slider relative to the core stem along the length direction moves; The cable is arranged in the boosting pipe and is threaded through the first avoiding hole.

9. The surgical instrument for endoscope according to claim 8, characterized by The cable is arranged to be in tension, which can be in contact with the boosting pipe;The endoscope surgical instrument further includes: Conductive plug, is arranged on the slider, and is connected with the boosting pipe.

10. The surgical instrument for endoscope according to claim 9, characterized by The cable includes: Body segment, is arranged in the boosting pipe; Connecting segment, is connected with the rotating piece; Transition section, is arranged between the body segment and the connecting segment, and is connected with the body segment and the connecting segment respectively, and the transition section and the body segment have an included angle beta; The connecting segment away from the transition section one end is the first end, and the body segment away from the transition section one end is the second end.

11. The surgical instrument for endoscope according to claim 10, characterized by At least part of the connecting segment extends along the rotation axis of the rotating piece.

12. The surgical instrument for endoscope according to claim 9, characterized by The core rod is provided with a first avoiding slot and a second avoiding slot extending along the length direction respectively, the inhaul cable penetrates through the first avoiding slot, the second avoiding slot is arranged with the first avoiding slot in the circumferential direction of the core rod, and the conductive plug penetrates through the second avoiding slot.

13. The surgical instrument for endoscopy according to claim 12, characterized in that The sliding block is provided with a containing channel corresponding to the position of the second avoiding slot, and the conductive plug is arranged in the containing channel. The extension direction of the containing channel intersects with the extension direction of the rotation axis of the rotating piece and the length direction respectively.

14. The surgical instrument for endoscope according to any one of claims 1 to 13, characterized in that, The execution piece comprises a sleeve.

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