A traction wheel, an operating handle, and an endoscope

Abstract

This utility model discloses a traction wheel, an operating handle, and an endoscope, relating to the field of medical device technology. The traction wheel is used for an endoscope and has a traction cable channel for threading a traction cable. The traction cable transmits pulling force to achieve the bending motion of the insertion part of the endoscope. The traction wheel also has a first opening and a second opening communicating with the traction cable channel. The first and second openings are alternately arranged along the extension path of the traction cable channel, and the orientation of the first opening is different from the orientation of the second opening. The alternating arrangement of the first and second openings along the extension path of the traction cable channel forms a discontinuous open structure on the traction wheel. While ensuring that the traction cable is difficult to detach from the traction cable channel, the assembler can clear the traction cable in the traction cable channel through the first or second opening with different orientations to smoothly perform the cable threading operation, without repeated blind insertion as in related technologies, thus improving assembly efficiency.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a traction wheel, an operating handle, and an endoscope. Background Technology

[0002] An endoscope is a commonly used medical device that can directly enter the body's natural passages, providing doctors with ample diagnostic information for disease treatment. Current endoscopes are often equipped with a traction wheel and a traction rope, with the traction rope wound around the traction wheel. By pulling or releasing the traction rope, the bending of the endoscope's insertion section can be controlled.

[0003] In the existing technology, the traction rope needs to be threaded into the hole inside the traction wheel. However, the traction rope is prone to blockage during the threading process, which increases the difficulty of installing the traction rope and the traction wheel and reduces the assembly efficiency. Utility Model Content

[0004] In view of the shortcomings of the above-mentioned related technologies, this application provides a traction wheel, an operating handle, and an endoscope to solve the above-mentioned technical problems.

[0005] In a first aspect, this application provides a traction wheel for an endoscope. The traction wheel has a traction channel for threading a traction rope, the traction rope being used to transmit pulling force to achieve the bending action of the insertion part of the endoscope. The traction wheel also has a first opening and a second opening communicating with the traction channel to expose the corresponding part of the traction rope. The first opening and the second opening are alternately arranged along the extension path of the traction channel, and the orientation of the first opening is different from the orientation of the second opening.

[0006] Secondly, this application provides an operating handle, including the aforementioned traction wheel.

[0007] Thirdly, this application provides an endoscope including the operating handle as described above.

[0008] The technical solution adopted in this utility model achieves the following beneficial effects: The traction wheel has a rope-passing channel through which the traction rope passes. The traction rope can connect to the insertion part of the endoscope to control the bending of the insertion part. The traction rope can be stably connected to the traction wheel, improving safety during use. Furthermore, the traction wheel has a first opening and a second opening with different orientations, which are alternately arranged along the extension path of the rope-passing channel. This forms a discontinuous open structure on the traction wheel. While ensuring that the traction rope is difficult to detach from the rope-passing channel, the assembler can clear the traction rope from the first or second opening with different orientations to smoothly perform the rope-passing operation without repeated blind insertion, thus improving assembly efficiency. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 This is a schematic diagram of the structure of an endoscope shown in an exemplary embodiment of this application;

[0011] Figure 2 This is a schematic diagram of the structure of a traction wheel shown in an exemplary embodiment of this application;

[0012] Figure 3 This is a schematic diagram of the structure of the traction wheel and traction rope shown in an exemplary embodiment of this application;

[0013] Figure 4 This is a cross-sectional view of a traction wheel and traction rope shown in an exemplary embodiment of this application;

[0014] Figure 5 This is a schematic diagram of the traction wheel from another perspective, illustrating an exemplary embodiment of this application;

[0015] Figure 6 This is a cross-sectional view of a traction wheel shown in an exemplary embodiment of this application;

[0016] Figure 7 This is a schematic diagram of the structure of the operating handle shown in an exemplary embodiment of this application;

[0017] Figure 8 yes Figure 7 A sectional view along line AA in the diagram.

[0018] In the diagram: 1. Endoscope; 100. Operating handle; 110. Traction wheel; 111. Rope passage; 1111. Straight section; 1112. Passage entrance; 1113. Passage exit; 112. First opening; 113. Second opening; 114. Stop; 115. Notch; 116. Arc transition section; 117. Winding section; 118. Connecting section; 120. Traction rope; 200. Insertion section. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0020] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0021] In the various embodiments of this application, "near end" and "far end" refer to the distance of each component from the user in the usage environment. The end closer to the user is designated as the "near end", and the end farther from the user is designated as the "far end".

[0022] In existing technologies, the traction rope needs to be threaded through a channel inside the traction wheel. However, blockages can easily occur during this process. For example, the wall of the channel may be in the insertion path of the traction rope, obstructing or rubbing against it, preventing the rope from passing through properly. Since the channel is a closed passage, assembly personnel cannot directly adjust it; they can only pull out the traction rope and re-thread it, but the risk of blockage remains. This increases the difficulty of assembling the traction rope and traction wheel, and reduces assembly efficiency.

[0023] This application provides a traction wheel 110; please refer to [reference needed]. Figure 1 as well as Figure 2 The traction wheel 110 is used for the endoscope 1. Furthermore, the traction wheel 110 can also be used for the operating handle 100 of the endoscope 1. The endoscope 1 also includes an insertion part 200, which is connected to the operating handle 100. The insertion part 200 can be inserted into the patient's body to observe and treat internal lesions. Medical personnel operate the operating handle 100 to control the insertion, bending, or aspiration of the insertion part 200, without limiting the function or type of the endoscope 1.

[0024] Please see Figure 3 and Figure 4The traction wheel 110 has a cable passage 111 for threading a traction rope 120. The cable passage 111 is adapted to fit the traction rope 120, and the traction rope 120 can be threaded through the cable passage 111. When the traction wheel 110 is driven, it pulls or releases the traction rope 120. The traction rope 120 is used to transmit pulling force to control the bending operation of the insertion part 200. More specifically, the distal end of the traction rope 120 is connected to the insertion part 200 of the endoscope 1. While the traction wheel 110 drives the traction rope 120, the traction rope 120 pulls the distal end of the insertion part 200. The distal end of the insertion part 200 is provided with a camera module, an illumination module, or a tube opening, etc. Under the drive of the traction rope 120, the distal end of the insertion part 200 bends in a predetermined direction. The camera module and the illumination module can be oriented towards different ranges, so that medical personnel can observe lesion image information from different angles.

[0025] Existing traction wheels have sealed channels through which the traction rope is threaded. However, the channel walls are in the path of the traction rope, or the rope may rub against the channel walls, easily causing blockages and preventing it from extending. While an open structure, such as a groove, might be used on the traction wheel to facilitate rope installation, the rope can still detach, leading to decreased stability. Please refer to [the original text]. Figure 2 The traction wheel 110 of this application also has a first opening 112 and a second opening 113, both of which are connected to the rope passage 111 to expose the corresponding portion of the traction rope 120. The first opening 112 and the second opening 113 are arranged alternately along the extension path of the rope passage 111. The orientation of the first opening 112 is different from that of the second opening 113. The first opening 112 and the second opening 113 are arranged alternately, which forms a discontinuous open structure on the traction wheel 110. While ensuring that the traction rope 120 is difficult to detach from the rope passage 111, the assembly personnel can clear the traction rope 120 in the rope passage 111 through the first opening 112 or the second opening 113 with different orientations to smoothly perform the rope threading operation, without repeated blind insertion as in related technologies. This improves the situation where the traction rope 120 is blocked in the traction wheel 110. By using one of the first opening 112 and the second opening 113, the assembly personnel can use a tool to move or guide the traction rope 120 in the rope passage 111 to clear the traction rope 120 without repeatedly inserting and removing the traction rope 120. This creates a discontinuous open structure on the traction wheel 110, which ensures that the traction rope 120 is difficult to detach from the rope passage 111. At the same time, the assembly personnel can clear the traction rope 120 in the rope passage 111 from the first opening 112 or the second opening 113 with different orientations to smoothly perform the rope threading operation without repeated blind insertion, thus improving assembly efficiency.

[0026] In this embodiment, each region of the rope-threading channel 111 is correspondingly provided with and connected to one of the first opening 112 and the second opening 113. Exemplarily, the rope-threading channel 111 includes at least a first segment and a second segment, which are connected. The first opening 112 is located in the first segment, and the second opening 113 is located in the second segment. Each region of the rope-threading channel 111 can be exposed through the first opening 112 and the second opening 113, and the traction rope 120 within the rope-threading channel 111 is always exposed in one direction, allowing assembly personnel to clearly observe and adjust the traction rope 120, thus improving assembly efficiency.

[0027] In one embodiment, the projections of adjacent first openings 112 and second openings 113 along the radial direction of the rope passage 111 are connected or partially overlap. Wherein, "connected projections" means the edges of the two projections are joined; "partially overlapping projections" means there is an overlap between the two projections, and the rope passage 111 corresponding to the overlapping portion can be exposed simultaneously along the first opening 112 and the second opening 113. This ensures that the traction rope 120 within each section of the rope passage 111 is exposed, and that all segments of the traction rope 120 within the rope passage 111 are always exposed, thereby facilitating the assembly personnel to clear blockages and simplifying installation.

[0028] Understandably, there can be one first opening 112 and one second opening 113, meaning that both a first opening 112 and a second opening 113 can be arranged along the extension path of the rope passage 111, and the first opening 112 and the second opening 113 can connect or partially overlap along the radial projection of the rope passage 111. This arrangement ensures that the first opening 112 and the second opening 113 can cover the entire range of the rope passage 111, ensuring that the traction rope 120 in each area can be exposed along either the first opening 112 or the second opening 113.

[0029] In other cases, the number of first opening 112 and / or second opening 113 may be multiple, such as 2, 3 or even more, which will not be elaborated here.

[0030] In existing systems, when the traction wheel rotates to a certain angle, the traction rope moves radially outward along the traction wheel, causing it to come into contact with and rub against the outer wall of the hole, making it prone to damage. In this application, the rope passage 111 may have an inlet 1112 and an outlet 1113, through which the traction rope 120 passes. Furthermore, the traction rope 120 enters the rope passage 111 through the inlet 1112 and exits through the outlet 1113. The inlet 1112 and outlet 1113 of the traction wheel 110 are open via the first opening 112 or the second opening 113. This allows the traction wheel 110 to have space at the channel entrance 1112 and channel exit 1113, preventing the wall of the rope passage 111 from obstructing the traction rope 120 and also preventing the wall from rubbing against the traction rope 120, reducing the risk of wear on the traction rope 120 and helping to improve the service life of the traction rope 120.

[0031] In one implementation, please refer to Figure 5 as well as Figure 6 The first opening 112 can be oriented radially towards the traction wheel 110, and the second opening 113 can be oriented intersecting the radial direction of the traction wheel 110. Further, the first opening 112 and the second opening 113 can be alternately distributed along the extension path of the rope passage 111. For example, the rope passage 111 includes at least a first section and a second section. A portion of the traction rope 120 located in the first section is exposed radially towards the traction wheel 110, and the second opening 113 can be oriented parallel to the axial direction of the traction wheel 120. A portion of the traction rope 120 located in the second section can be exposed along the side of the traction wheel 110. This allows the traction rope 120 to be exposed through different openings. This arrangement reduces the difficulty of installing the traction rope 120 while preventing the traction rope 120 from directly detaching from a single opening, thus reducing the risk of the traction rope 120 detaching from the traction wheel 110 and improving the efficiency and safety of the traction wheel 110.

[0032] Of course, in some other cases, the orientation of the second opening 113 can be the radial direction of the traction wheel 110, and the orientation of the first opening 112 intersects the radial direction of the traction wheel 110. This can also allow the traction rope 120 to be exposed through different openings, which will not be elaborated here.

[0033] Please refer again to the embodiments in this application. Figure 5The traction wheel 110 is provided with a stop portion 114, which corresponds to the second opening 113 and radially limits the traction rope 120 located within the rope passage 111. For example, the stop portion 114 may form the rope passage 111, and the stop portion 114 is located on the side of the rope passage 111 away from the axis of the traction wheel 110. This ensures that after the traction rope 120 passes through the rope passage 111, the stop portion 114 can prevent the traction rope 120 from slipping outwards in the radial direction. For example, when the traction rope 120 moves along the rope passage 111, the inner wall of the stop portion 114 contacts the outer surface of the traction rope 120, preventing the traction rope 120 from slipping out of the rope passage 111 due to tension changes or external forces. This limiting effect effectively improves the reliability of the operating handle 100 when the traction wheel 110 rotates or bears a load.

[0034] In addition, the second opening 113 and the stop part 114 are provided correspondingly. While the stop part 114 acts as a stop, the second opening 113 can ensure that the traction rope 120 in the rope passage 111 is exposed. When the traction rope 120 is blocked during the threading process, the assembly personnel can adjust the traction rope 120 through the second opening 113 to ensure smooth assembly.

[0035] In one implementation, please refer to [link / reference needed]. Figure 5 The number of stop portions 114 is multiple, such as two, three, or even more, without limitation. Multiple stop portions 114 are spaced apart along the outer circumference of the traction wheel 110. The multiple stop portions 114 can be evenly distributed along the outer circumference of the traction wheel 110. Of course, in some other cases, the multiple stop portions 114 can be unevenly distributed along the outer circumference of the traction wheel 110, without limitation. A second opening 113 is correspondingly provided to the stop portions 114, and a first opening 112 is formed between two adjacent stop portions 114. In other words, when the stop portion 114 provides radial restraint for the traction rope 120, the orientation of the second opening 113 intersects radially with the traction rope 120 to ensure that the traction rope 120 can be exposed. The even distribution of the multiple stop portions 114 ensures the balance of circumferential force on the traction wheel 110, reducing structural wear caused by localized stress concentration.

[0036] In this embodiment, the stop portion 114 can be integrally formed with the traction wheel 110. Furthermore, the stop portion 114 and the traction wheel 110 can be integrally injection molded or ultrasonically welded, which can improve the connection stability between the stop portion 114 and the traction wheel 110. This is not a limitation. Of course, in other cases, the stop portion 114 can be detachably set from the traction wheel 110, which is beneficial for replacing and unblocking the traction rope 120. This will not be elaborated upon here.

[0037] For more details, please see Figure 6The rope passage 111 includes multiple straight sections 1111, the number of which can be two, three, or even more, without limitation. These straight sections 1111 are arranged sequentially, with a second opening 113 located within each straight section 1111 and a first opening 112 located between two adjacent straight sections 1111. Furthermore, if the angle change at the connection point between two adjacent straight sections 1111 is too large, blockage can easily occur. The first opening 112 faces the radial direction of the traction wheel 110. This opening allows the connection point to be radially open along the traction wheel 110, facilitating observation by the assembly personnel of the traction rope 120 within the previous or next straight section 1111. This observation helps the assembly personnel to accurately clear the traction rope 120 within the straight section 1111. Simultaneously, the assembly personnel can also adjust and clear the traction rope 120 within the connection point through the first opening 112, preventing blockages.

[0038] Furthermore, this design allows the traction rope 120 to extend in a straight line within the straight section 1111, reducing the risk of blockage. Simultaneously, when the traction rope 120 needs to be threaded from one straight section 1111 to the next, it first exits the traction wheel 110 through the first opening 112, and then returns to the next straight section 1111 through the same opening. Adjusting the extension direction of the traction rope 120 is performed outside the traction wheel 110, reducing the difficulty of threading the rope and improving assembly efficiency.

[0039] Understandably, in some other cases, the orientation of the second opening 113 can be radial to the traction wheel 110, and the orientation of the first opening 112 intersects the radial direction of the traction wheel 110. The first opening 112 can be located on the side of the traction wheel 110, and the assembly personnel can still clear the traction rope 120 through the first opening 112, which will not be elaborated here.

[0040] In the embodiments of this application, please refer to Figure 6An arc transition portion 116 is provided between two adjacent straight sections 1111, and the first opening 112 is disposed opposite to the arc transition portion 116. For example, the arc transition portion 116 can be the connection point between two adjacent straight sections 1111, and the arc transition portion 116 can further achieve a smooth transition between the two adjacent straight sections 1111. The arc transition portion 116 can prevent excessive stress concentration when the traction rope 120 bends. The first opening 112 is disposed opposite to the arc transition portion 116 so that when the traction rope 120 enters or exits the straight section 1111, its bending point is located at the arc transition portion 116. For example, when the traction rope 120 enters the straight section 1111 from the first opening 112, it is first guided by the arc transition portion 116. The gradual curvature of the arc transition portion 116 can make the bending stress of the traction rope 120 evenly distributed, reducing the risk of damage or breakage of the traction rope 120 due to right-angle bending and extending the service life of the traction rope 120. In addition, the arc transition portion 116 can be formed on the side of the rope passage 111 away from the second opening 113. The groove wall surrounding the rope passage 111 can restrict the traction rope 120 from moving axially along the traction wheel 110, preventing the traction rope 120 from detaching from the traction wheel 110.

[0041] Of course, when there are multiple straight segments 1111, such as 3, 4 or even more, the number of arc transition portions 116 can be set to at least two, so that an arc transition portion 116 is provided between two adjacent straight segments 1111. This will not be elaborated here.

[0042] In one implementation, please refer to [link / reference needed]. Figure 6 The traction wheel 110 has a notch 115 and a connecting part 118. The traction rope 120 passes through the notch 115 and connects to the connecting part 118. The notch 115 allows the proximal end of the traction rope 120 to be directly exposed outside the traction wheel 110, facilitating the operator to bond and fix the proximal end of the traction rope 120 to the connecting part 118. For example, during the bonding process, the notch 115 provides sufficient operating space to ensure that the adhesive is evenly applied to the contact surface between the traction rope 120 and the connecting part 118, avoiding weak bonding due to limited space. Furthermore, the connecting part 118 may have through holes or grooves, allowing the traction rope 120 to pass through it and then be connected to the connecting part 118 by bonding or other methods, improving structural stability. Alternatively, the traction rope 120 can be directly wrapped around the connecting part 118 to ensure a stable connection; however, these are not elaborated upon here.

[0043] In the embodiments of this application, please continue to refer to Figure 6In the traction wheel 110, the outer part surrounding the rope threading channel 111 is a transparent structure. This transparent structure can be made of transparent materials such as polycarbonate (PC) or acrylic (PMMA), possessing sufficient strength. This design allows assembly personnel to directly observe the direction, winding state, and engagement of the stop 114 with the traction rope 120 inside the rope threading channel 111 during rope threading or inspection. For example, in the assembly of multi-segment rope threading channels 111, operators can use the transparent structure to confirm whether the traction rope 120 has correctly passed through each point of the channel, and to easily observe whether there is any blockage in the traction rope 120 and the specific cause of the blockage, thus avoiding missed or incorrect threading and improving assembly accuracy and efficiency. Simultaneously, the transparent structure facilitates later maintenance by allowing inspection for foreign object blockages or wear on the traction rope 120 without disassembling the traction wheel 110.

[0044] In one implementation, please refer to [link / reference needed]. Figure 6 The traction wheel 110 may also include a winding portion 117, in which a rope passage 111, a first opening 112, and a second opening 113 are all formed. It is understood that the straight section 1111 and the arc transition portion 116 are also formed in the winding portion 117. A notch 115 is formed between the winding portion 117 and the connecting portion 118, and the portion of the winding portion 117 near the notch 115 is connected to the traction rope 120. For example, the portion of the winding portion 117 near the notch 115 has an outlet for leading out the traction rope 120. The outlet is connected to the notch 115, and the traction rope 120 can be connected to the wall forming the outlet. The connection method can be adhesive, snap-fit, etc., and is not limited. After passing through the rope passage 111 of the winding portion 117, the traction rope 120 is fixedly connected to the connecting portion 118 through the notch 115. The traction rope 120 is connected to the winding part 117 before passing through the gap 115. This ensures that the winding part 117 can be stably connected to the traction rope 120, and avoids the traction rope 120 from bending or breaking at the opening of the winding part 117. This improves the service life and safety of the traction wheel 110 and the traction rope 120, and enhances the connection stability between the traction wheel 110 and the traction rope 120.

[0045] To achieve the above and other related objectives, this application provides an operating handle 100. Please refer to [link / reference]. Figure 7 and Figure 8 The operating handle 100 includes the aforementioned traction wheel 110. This gives the operating handle 100 the beneficial effects of any of the aforementioned solutions, which will not be elaborated further here.

[0046] To achieve the above and other related objectives, this application provides an endoscope 1. Please refer to the previous section for further details. Figure 1Endoscope 1 includes the aforementioned operating handle 100. This gives endoscope 1 the beneficial effects of any of the aforementioned solutions, which will not be elaborated further here. Endoscope 1 can be a bronchoscope, pyeloscope, esophagoscope, gastroscope, colonoscope, otoscope, rhinoscope, oral endoscope, laryngoscope, colposcope, laparoscope, arthroscope, etc. This application does not specifically limit the type of endoscope 1.

[0047] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0048] Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

[0049] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A traction wheel for an endoscope, characterized in that, The traction wheel has a cable passage for threading a traction rope, which is used to transmit pulling force to achieve the bending action of the insertion part of the endoscope. The traction wheel also has a first opening and a second opening communicating with the cable passage to expose the corresponding part of the traction rope. The first opening and the second opening are alternately arranged along the extension path of the cable passage, and the orientation of the first opening is different from the orientation of the second opening.

2. The traction wheel according to claim 1, characterized in that, Each region of the rope-threading channel is correspondingly provided with and connected to one of the first opening and the second opening; And / or, the first opening is oriented radially to the traction wheel, and the second opening is oriented intersecting the radial direction of the traction wheel; And / or, the rope passage has a channel inlet and a channel outlet, the traction rope is threaded through the channel inlet and the channel outlet, and the traction wheel is open at the channel inlet and channel outlet through the first opening or the second opening.

3. The traction wheel according to claim 1, characterized in that, The traction wheel is provided with a stop part, which is provided corresponding to the second opening and radially limits the traction rope located in the rope passage.

4. The traction wheel according to claim 3, characterized in that, The number of the stop portions is multiple, and the multiple stop portions are arranged at intervals along the outer periphery of the traction wheel, with the first opening being opened between two adjacent stop portions.

5. The traction wheel according to claim 1, characterized in that, The rope-threading channel includes multiple straight sections arranged sequentially, with the second opening located on one of the straight sections and the first opening located between two adjacent straight sections.

6. The traction wheel according to claim 5, characterized in that, An arc transition section is provided between two adjacent straight sections, and the first opening is positioned opposite to the arc transition section.

7. The traction wheel according to claim 1, characterized in that, The traction wheel has a notch, and the traction wheel is also provided with a connecting part. The traction rope passes through the notch and is connected to the connecting part. And / or, in the traction wheel, the exterior of the rope-passing channel is a transparent structure.

8. The traction wheel according to claim 7, characterized in that, The traction wheel also includes a winding portion, in which the rope passage, the first opening, and the second opening are formed, and the notch is formed between the winding portion and the connecting portion. The portion of the winding portion near the notch is connected to the traction rope.

9. An operating handle, characterized in that, Includes the traction wheel as described in any one of claims 1-8.

10. An endoscope, characterized in that, Includes the operating handle as described in claim 9.

Images