Pull line control wheel set structure and endoscope
By employing a traction line control wheel assembly structure in the endoscope, and using limiting components and guide grooves to restrict the rotation angle of rotating components, the problems of wire rope derailment and complex position control are solved, thereby improving the reliability of the endoscope and reducing production costs.
Patent Information
- Application Number
- CN202422762487.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-13
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-11-13
AI Technical Summary
The existing endoscope rotary assembly is prone to wire rope derailment during rotation, and the wire rope position control structure is complex, resulting in poor reliability and high production costs.
The wheel assembly structure is controlled by a traction line, including a housing assembly and two sets of rotating assemblies. The rotating parts have guide grooves and positioning parts. The rotation angle of the rotating parts and the position of the traction line are limited by limiting parts to prevent derailment and misalignment.
It improves the reliability of the endoscope, simplifies the rotation limit structure, reduces the risk of wire rope misalignment and derailment, and lowers production costs.
Smart Images
Figure CN223601431U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to medical instrument technical field especially, and it is endoscope to pull line control wheel group structure. BACKGROUND
[0002] Endoscope is the medical instrument that is often used in clinic, and medical staff can use endoscope to observe, tissue sampling, hemostasis, resection, drainage, repair or rebuild channel under direct vision or under the support of auxiliary equipment through natural cavity of human body or artificially established channel, etc. Endoscope often uses snake bone structure to control the movement direction of operating end, and the snake bone structure generally has two plane two movement, that is, can realize the bending movement of four directions of up, down, left and right. The movement of snake bone structure is controlled by steel wire rope wound on the rotating wheel group, and the position of steel wire rope is controlled through the rotation of rotating wheel group, so as to adjust the bending angle of snake bone structure to meet the operation demand of operating end. In the rotating process of rotating wheel group, the wound steel wire rope is prone to dislocation and derailment, and the reliability is poor, which affects the normal use of endoscope. Moreover, the position control structure of steel wire rope is relatively complex, and some endoscopes are provided with limiting blocks on the steel wire rope, the limiting blocks slide in the sliding groove, the position of limiting block in the sliding groove is controlled to adjust the position of steel wire rope, so that the structure of endoscope is relatively complex, and the cost is higher. CONTENT OF UTILITY MODEL
[0003] The first purpose of the utility model is to provide pull line control wheel group structure, which can solve the problems that the rotating wheel group of the existing endoscope is prone to derailment and has poor reliability in the rotating process, and the position control structure of steel wire rope is relatively complex.
[0004] To achieve this purpose, the utility model adopts the following technical solutions:
[0005] Provided is a traction line control wheel set structure for controlling a bending structure, which comprises a shell assembly and two sets of rotating assemblies, the rotating assemblies comprising rotating members and traction lines wound around the rotating members, the two traction lines being used to control the bending structure to bend up and down and left and right with respect to the extension direction, respectively, the rotating members being rotatably arranged on the shell assembly to drive the traction lines to reciprocate along the extension direction of the traction lines, the shell assembly being provided with first and second limiting members, the rotating members being provided with constraint portions rotatably connected to the first and second limiting members, respectively, the first limiting member being arranged to abut against and limit the rotation of one of the constraint portions to limit the rotation angle of the rotating member about its axis, and the second limiting member being arranged to abut against and limit the rotation of the other constraint portion to limit the rotation angle of the other rotating member about its axis; the rotating member is provided with a guide groove extending in the circumferential direction, the guide groove is provided with a positioning portion extending in the axial direction, a through hole is formed between the positioning portion and the bottom of the guide groove, and the traction line passes through the through hole and is constrained in the guide groove.
[0006] As an optional structure of the utility model, the traction line comprises a first traction line and a second traction line, the first traction line and the second traction line are arranged on the two sides of the rotating member in the axial direction, one end of the first traction line and the second traction line is connected to the rotating member, and the other end is connected to the bending structure, when the rotating member rotates, the first traction line and the second traction line simultaneously move along the extension direction of the traction line and the moving direction is opposite.
[0007] As an optional structure of the utility model, the rotating member is provided with a partition arranged in the guide groove to divide the guide groove into a first guide groove and a second guide groove arranged side by side in the axial direction, the positioning portion extends through the partition to be arranged in the first guide groove and the second guide groove, the first traction line is constrained in the first guide groove, and the second traction line is constrained in the second guide groove.
[0008] As an optional structure of the utility model, the two rotating members are coaxial and arranged in the axial direction, the shell assembly comprises a bottom shell and an upper cover which are detachably connected, the bottom shell and the upper cover form a mounting cavity, the two rotating members are arranged in the mounting cavity, the upper cover is provided with the first limiting member, and the bottom shell is provided with the second limiting member.
[0009] As an optional structure of the utility model, the rotating assembly further includes a first operating member and a second operating member which are coaxial and arranged along the axial direction, a first through hole which penetrates along the axial direction is formed in the rotating shaft of the second operating member, a second through hole which penetrates along the axial direction is formed in the rotating member, the rotating shaft of the first operating member is sequentially arranged in the first through hole and the second through hole to be connected to the rotating member below, and the second operating member is connected to the rotating member above.
[0010] As an optional structure of the utility model, the shell assembly further includes a guide member which is arranged on the bottom shell and is arranged in the rotating assembly, the guide member is located on the extension path of the traction line, a plurality of guide holes are formed in the guide member, and the traction line is arranged in the guide holes.
[0011] As an optional structure of the utility model, the rotating member has at least two positioning portions which are arranged along the circumferential direction of the rotating member, and the traction line is sequentially arranged in the at least two through holes.
[0012] As an optional structure of the utility model, the rotating member further includes a sleeve and first and second positioning plates which are arranged at two ends of the sleeve, and the guide groove is formed between the first and second positioning plates.
[0013] As an optional structure of the utility model, one of the first limiting member and the constraint portion is an arc-shaped limiting groove, and the other is a limiting protrusion, the limiting protrusion is slidably arranged in the arc-shaped limiting groove, the inner wall at the two ends of the arc-shaped limiting groove in the length direction is used for abutting and limiting the limiting protrusion, and the first limiting member and the second limiting member are both the arc-shaped limiting groove or both the limiting protrusion.
[0014] The second object of the utility model is to provide an endoscope which can solve the problems that the rotating member group of the existing endoscope is prone to derailment in the rotating process, has poor reliability, and the position control structure of the steel wire rope is relatively complex, thereby increasing the production cost of the endoscope.
[0015] To achieve the object, the utility model adopts the following technical scheme in another aspect.
[0016] The utility model provides an endoscope, including the traction line control wheel group structure, the endoscope further includes a bending structure and an operating assembly, the operating assembly is connected to the end of the bending structure, and the traction line control wheel group structure is connected to the other end of the bending structure.
[0017] The utility model has the advantages of the following:
[0018] The traction line control wheel set structure provided by the utility model has the first limiting piece and the second limiting piece, the rotating piece has the constraint part, and the two constraint parts are rotatably connected to the first limiting piece and the second limiting piece respectively, the first limiting piece is arranged to abut and limit the rotation of one constraint part to limit the rotation angle of the rotating piece around its own axis, the second limiting piece is arranged to abut and limit the rotation of the other constraint part to limit the rotation angle of the other rotating piece around its own axis, thereby controlling the positions of the traction lines respectively.
[0019] The endoscope provided by the utility model has the traction line control wheel set structure described above, can limit the rotation of the rotating piece through the constraint part of the rotating piece and the first limiting piece and the second limiting piece of the shell assembly, thereby adjusting the positions of the traction lines respectively, and has simple rotation limiting structure and improves the reliability of the endoscope and reduces the risk of mispositioning and derailment of the traction line. BRIEF DESCRIPTION OF DRAWINGS
[0020] Figure 1 is a partial structure schematic view of the traction line control wheel set structure provided by the utility model embodiment;
[0021] Figure 2 is a structure disassembly schematic view of the traction line control wheel set structure provided by the utility model embodiment;
[0022] Figure 3 is Figure 2 is a local structure enlarged schematic view of part A in the figure;
[0023] Figure 4 is a structure schematic view of the rotating piece in the first visual angle provided by the utility model embodiment;
[0024] Figure 5 is a structure schematic view of the upper cover provided by the utility model embodiment.
[0025] In the figure:
[0026] 1, shell assembly; 11, bottom shell; 12, upper cover; 13, guide; 131, guide hole; 14, arc-shaped limiting groove; 15, main shaft;
[0027] 2, rotating assembly; 21, rotating piece; 210, limiting protrusion; 211, guide groove; 2111, first guide groove; 2112, second guide groove; 212, positioning part; 213, through hole; 214, partition piece; 215, second through hole; 216, sleeve; 217, first positioning plate; 218, second positioning plate; 22, traction line; 221, first traction line; 222, second traction line; 23, first operating piece; 24, second operating piece; 241, first through hole. DETAILED DESCRIPTION
[0028] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0029] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements 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. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and moreover, the "above", "above" and "above" of the first feature relative to the second feature include the vertical direction of the first feature above and obliquely above the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature relative to the second feature include the vertical direction of the first feature below and obliquely below the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.
[0030] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0031] The term "cooperate" can be broadly understood as any situation in which two or more objects are connected in a manner that allows the cooperating objects to operate in conjunction with each other. It should be noted that cooperation does not require a direct connection (e.g., a direct physical or electrical connection), but rather many objects or components can be used to cooperate two or more objects. For example, objects A and B can cooperate through the use of object C. Furthermore, the term "detachably coupled" or "detachably cooperate" can be interpreted to mean a non-permanent coupling or cooperating situation between two or more objects. This means that the detachably coupled objects can be uncoupled and separated such that they no longer operate in conjunction.
[0032] Finally, the terms "or" and "and / or" as used herein are to be interpreted as inclusive or meaning any one or any combination. Therefore, "A, B or C" or "A, B and / or C" means any of the following: A; B; C; A and B; A and C; B and C; A, B and C. An exception to this definition will occur only when two or more elements, functions, steps or acts are in some way inherently mutually exclusive.
[0033] The embodiments of the present application are described in detail below with reference to the accompanying drawings. Examples of the embodiments are shown in the drawings, wherein the same or similar components are denoted by the same or similar reference numerals throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application and cannot be understood as limiting the present application.
[0034] As shown in Figure 1 and Figure 2 The present application embodiment first provides a traction line control wheel set structure for controlling a bending structure, which comprises a shell assembly 1 and two sets of rotating assemblies 2. The rotating assembly 2 comprises a rotating member 21 and a traction line 22 wound on the rotating member 21. Two traction lines 22 are respectively used to control the up-down bending and left-right bending of the bending structure relative to the extension direction. The two rotating members 21 are rotatably arranged on the shell assembly 1 to drive the traction line 22 to reciprocate along the extension direction thereof.
[0035] The shell assembly 1 has a first limiting piece and a second limiting piece, the rotating piece 21 has two constraint parts, and the two constraint parts are respectively rotatably connected to the first limiting piece and the second limiting piece. The first limiting piece is arranged to abut and limit the rotation of one of the constraint parts to limit the rotation angle of the rotating piece 21 around its own axis. The second limiting piece is arranged to abut and limit the rotation of the other constraint part to limit the rotation angle of the other rotating piece 21 around its own axis, thereby respectively controlling the position of the traction line 22. The rotating piece 21 is provided with a guide groove 211 extending in the circumferential direction, and the guide groove 211 is provided with a positioning part 212 extending in the axial direction. The positioning part 212 and the bottom of the guide groove 211 form a through hole 213, and the traction line 22 passes through the through hole 213 and is constrained in the guide groove 211.
[0036] The traction line control wheel set structure provided by the embodiment forms two stop points of the constraint parts through the first limiting piece and the second limiting piece, and limits the rotation angle of the rotating piece 21 around its own axis through the rotation angle between the two stop points, thereby adjusting the position of the traction line 22 and meeting the rotation angle requirement of the curved structure. The rotation limiting structure is simple. The guide groove 211 limits the winding position of the traction line 22 on the rotating piece 21, which can avoid the traction line 22 from being separated from the rotating piece 21 in the axial direction of the rotating piece 21. The positioning part 212 can avoid the traction line 22 from being separated from the rotating piece 21 in the circumferential direction of the rotating piece 21, thereby improving the reliability of the traction line 22 during the rotation of the rotating piece 21 and reducing the risk of mispositioning and derailment of the traction line 22.
[0037] The specific structure of the curved structure and the principle of the rotating assembly 2 for controlling the curved structure can be set according to the prior art, which is not limited herein. The traction line 22 includes but is not limited to a steel wire rope, and other flexible wires can also be used.
[0038] The traction line 22 includes a first traction line 221 and a second traction line 222, and the first traction line 221 and the second traction line 222 are respectively arranged on the two sides of the axial direction of the rotating piece 21. The first traction line 221 and the second traction line 222 are both connected to the rotating piece 21 at one end and connected to the curved structure at the other end, which is convenient for threading. When the rotating piece 21 rotates, the first traction line 221 and the second traction line 222 simultaneously move along their own extension directions and the moving directions are opposite, thereby achieving control of the two-direction rotation of the curved structure in the same plane.
[0039] As Figure 4As shown, the rotating member 21 has a partition 214 arranged in the guide groove 211 to divide the guide groove 211 into a first guide groove 2111 and a second guide groove 2112 arranged in parallel along the axial direction, the positioning portion 212 extends through the partition 214 to be arranged in the first guide groove 2111 and the second guide groove 2112, the first traction line 221 is constrained in the first guide groove 2111, and the second traction line 222 is constrained in the second guide groove 2112. In this way, the mutual interference of the first traction line 221 and the second traction line 222 due to mutual entanglement can be reduced, and neither the first traction line 221 nor the second traction line 222 will appear to be bent during the forward rotation and reverse rotation of the rotating member 21.
[0040] The two rotating members 21 are coaxial and arranged in axial direction. The shell assembly 1 comprises a bottom shell 11 and an upper cover 12 which are detachably connected to each other. The bottom shell 11 and the upper cover 12 form a mounting cavity, and the two rotating members 21 are arranged in the mounting cavity. The upper cover 12 is provided with a first limiting member, and the bottom shell 11 is provided with a second limiting member. The constraint portions of the two rotating members 21 are both directed to the outer side of the rotating member 21, so as to be connected to the first limiting member on the upper cover 12 and the second limiting member on the bottom shell 11, respectively. The coaxial arrangement of the two rotating members 21 is relatively compact.
[0041] In order to increase the convenience of controlling the rotation of the rotating member 21, the rotating assembly 2 further comprises a first operating member 23 and a second operating member 24 which are coaxial and arranged in axial direction. The rotating shaft of the second operating member 24 is provided with a first through hole 241 which penetrates in axial direction. The rotating member 21 is provided with a second through hole 215 which penetrates in axial direction. The rotating shaft of the first operating member 23 is sequentially arranged in the first through hole 241 and the second through hole 215 to be connected to the lower rotating member 21. The second operating member 24 is connected to the upper rotating member 21. Rotating the first operating member 23 can control the rotation of the lower rotating member 21, and rotating the second operating member 24 can control the rotation of the upper rotating member 21, without interference between each other. The first operating member 23 and the second operating member 24 are convenient for the user to hold and operate.
[0042] The shell assembly 1 further comprises a main shaft 15 which is connected to the bottom shell 11. The two rotating members 21, the upper cover 12, the first operating member 23 and the second operating member 24 are all sleeved on the main shaft 15, so as to ensure the coaxial arrangement of the above-mentioned components. The upper cover 12 is provided with a first mounting hole, and the bottom shell 11 is provided with a second mounting hole. The first mounting hole and the second mounting hole are correspondingly arranged. One of the first mounting hole and the second mounting hole is a light hole, and the other is a threaded hole. A fastener penetrates through the first mounting hole and the second mounting hole, so as to realize the detachable connection of the bottom shell 11 and the upper cover 12, and ensure the stability of the mounting cavity. The two rotating members 21 can freely rotate without interference with the bottom shell 11 and the upper cover 12.
[0043] In order to further reduce the risk of traction line 22 buckling and derailing, the shell assembly 1 further comprises a guide 13, which is arranged on the bottom shell 11 and spaced from the rotating assembly 2, and the guide 13 is located on the extension path of the traction line 22. The guide 13 is provided with a plurality of guide holes 131, and the traction line 22 is arranged in the guide holes 131.
[0044] In order to improve the reliability of the traction line 22 around the rotating member 21, the rotating member 21 has at least two positioning portions 212, which are arranged in the circumferential direction of the rotating member 21, and the traction line 22 is arranged in the at least two guide holes 213 in sequence. The extension length of the rotating member 21 in the circumferential direction is relatively long, so that even if the rotating angle of the rotating member 21 is relatively large, the traction line 22 can still be guided in the guide groove 211 under the limiting of the at least two positioning portions 212 without derailing. The embodiment does not limit the appearance structure of the guide 13, as long as it has a guide hole 213 to guide the traction line 22.
[0045] The rotating member 21 further comprises a sleeve 216 and a first positioning plate 217 and a second positioning plate 218 sleeved on both ends of the sleeve 216, and the first positioning plate 217 and the second positioning plate 218 form a guide groove 211 therebetween. One of the first limiting member and the constraint portion is an arc-shaped limiting groove 14, and the other is a limiting protrusion 210, which is slidably arranged in the arc-shaped limiting groove 14, and the inner wall of the arc-shaped limiting groove 14 at both ends in the length direction is used to abut against the limiting protrusion 210, and the first limiting member and the second limiting member are both arc-shaped limiting grooves 14 or both are limiting protrusions 210. Exemplarily, in an embodiment, one end face of the rotating member 21 is provided with a limiting protrusion 210; correspondingly, as shown in Figure 3 and Figure 5 The inner side faces of the bottom shell 11 and the upper cover 12 are respectively provided with arc-shaped limiting grooves 14, and the limiting protrusions 210 of the upper rotating member 21 are movably arranged in the arc-shaped limiting grooves 14 of the upper cover 12, and the limiting protrusions 210 of the lower rotating member 21 are movably arranged in the arc-shaped limiting grooves 14 of the bottom shell 11.
[0046] The utility model embodiment secondly still provides an endoscope, including the traction line control wheel group structure in any one of the above embodiment, the endoscope still includes the bending structure and operating assembly, operating assembly connects in the end of bending structure, and the traction line control wheel group structure is connected in the other end of bending structure. Traction line control wheel group structure respectively through first limit piece, second limit piece, forms two stop points of restraint part, and through the rotation angle between two stop points limits the rotation angle of rotating part 21 around its axis, thereby adjusts the position of traction line 22, satisfies the rotation angle demand of bending structure, and rotation limit position structure is simple. Guiding groove 211 carries out the restriction to the winding position of traction line 22 on rotating part 21, can avoid traction line 22 in the axial direction of rotating part 21 and separate from rotating part 21;Positioning portion 212 can avoid traction line 22 in the circumferential direction of rotating part 21 and separate from rotating part 21, reduce the dislocation, derailment risk of traction line 22, thereby improve the use reliability of endoscope.
[0047] Obviously, the above embodiments of the utility model are only for clear illustration of the utility model, and are not the limitation of the implementation mode of the utility model. For ordinary skilled person in the art, can make various obvious changes, re-adjustment and replacement without departing from the protection scope of the utility model. Here, it is unnecessary and impossible to enumerate all the implementation modes. Any modification, equivalent replacement and improvement etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.
Claims
1. A traction line control wheel set structure for controlling a bending structure, comprising a housing assembly (1) and two sets of rotating assemblies (2), each of the rotating assemblies (2) comprising a rotating member (21) and a traction line (22) wound around the rotating member (21), the two traction lines (22) being used for controlling the bending structure to bend up and down and left and right with respect to an extending direction, respectively, and each of the rotating members (21) being rotatably arranged in the housing assembly (1) to drive the traction line (22) to reciprocate along the extending direction thereof, characterized in that, The shell assembly (1) has a first limiting piece and a second limiting piece, the rotating piece (21) has two constraint parts, and the two constraint parts are respectively rotatably connected to the first limiting piece and the second limiting piece; the first limiting piece is arranged to abut and limit the rotation of one of the constraint parts to limit the rotation angle of the rotating piece (21) around its own axis, and the second limiting piece is arranged to abut and limit the rotation of the other constraint part to limit the rotation angle of the other rotating piece (21) around its own axis; the rotating piece (21) is provided with a circumferentially extending guide groove (211), and an axially extending positioning part (212) is arranged in the guide groove (211); a through hole (213) is formed between the positioning part (212) and the bottom of the guide groove (211), and the traction line (22) passes through the through hole (213) and is constrained in the guide groove (211).
2. The traction line control wheelset structure according to claim 1, characterized in that, The traction line (22) includes a first traction line (221) and a second traction line (222), and the first traction line (221) and the second traction line (222) are arranged on the two sides of the rotating piece (21) in the axial direction; one end of each of the first traction line (221) and the second traction line (222) is connected to the rotating piece (21), and the other end is connected to the curved structure; when the rotating piece (21) rotates, the first traction line (221) and the second traction line (222) move simultaneously along their own extension direction and in opposite directions.
3. The traction line control wheelset structure according to claim 2, characterized in that, The rotating piece (21) has a partition (214) arranged in the guide groove (211) to divide the guide groove (211) into a first guide groove (2111) and a second guide groove (2112) arranged side by side in the axial direction; the positioning part (212) extends through the partition (214) and is arranged in the first guide groove (2111) and the second guide groove (2112); the first traction line (221) is constrained in the first guide groove (2111), and the second traction line (222) is constrained in the second guide groove (2112).
4. The traction line control wheelset structure of claim 1, wherein, The two rotating pieces (21) are coaxial and arranged axially spaced apart; the shell assembly (1) includes a bottom shell (11) and an upper cover (12) which are detachably connected to each other; the bottom shell (11) and the upper cover (12) form a mounting cavity, and the two rotating pieces (21) are arranged in the mounting cavity; the upper cover (12) is provided with the first limiting piece, and the bottom shell (11) is provided with the second limiting piece.
5. The traction line control wheelset structure according to claim 4, characterized in that, The rotating assembly (2) further comprises a first operating member (23) and a second operating member (24) coaxially and axially spaced, the rotating shaft of the second operating member (24) is provided with a first through hole (241) axially penetrating, the rotating member (21) is provided with a second through hole (215) axially penetrating, the rotating shaft of the first operating member (23) is sequentially arranged in the first through hole (241) and the second through hole (215) to connect the lower rotating member (21), and the second operating member (24) is connected to the upper rotating member (21).
6. The traction line control wheelset structure of claim 4, wherein, The shell assembly (1) further comprises a guide member (13) arranged on the bottom shell (11) and spaced from the rotating assembly (2), the guide member (13) is located on the extension path of the traction line (22), and the guide member (13) is provided with a plurality of guide holes (131), and the traction line (22) is arranged in the guide hole (131).
7. The pulley assembly of any of claims 1-6, wherein, The rotating member (21) has at least two positioning portions (212) arranged along the circumference of the rotating member (21), and the traction line (22) is sequentially arranged in the at least two through holes (213).
8. The traction line control wheelset arrangement according to any one of claims 1-6, characterized in that, The rotating member (21) further comprises a sleeve (216) and a first positioning plate (217) and a second positioning plate (218) sleeved on both ends of the sleeve (216), and the first positioning plate (217) and the second positioning plate (218) form the guide groove (211).
9. The pulley assembly of any of claims 1-6, wherein, One of the first limiting member and the constraint portion is an arc-shaped limiting groove (14), and the other is a limiting protrusion (210), the limiting protrusion (210) is slidably arranged in the arc-shaped limiting groove (14), the inner wall of the arc-shaped limiting groove (14) at both ends in the length direction is used for abutting and limiting the limiting protrusion (210), and the first limiting member and the second limiting member are both the arc-shaped limiting groove (14) or both the limiting protrusion (210).
10. An endoscope characterized by The endoscope comprises the traction line control wheel set structure, and further comprises a bending structure and an operating assembly, the operating assembly is connected to the end of the bending structure, and the traction line control wheel set structure is connected to the other end of the bending structure.