Traction wheel locking structure and endoscope

Abstract

The utility model relates to the field of endoscopes, and discloses a traction wheel locking structure and an endoscope, the traction wheel locking structure can be used for the endoscope, the endoscope comprises a shell, the traction wheel locking structure is arranged in the shell, the traction wheel locking structure comprises a traction assembly, the traction assembly is rotationally arranged in the shell, and the traction assembly comprises a locking part and a limiting part; and the locking assembly can move relative to the locking part so as to lock or release the locking part and is used for locking or unlocking the traction assembly, and the locking assembly is in rotary limiting fit with the limiting part at any position. According to the embodiment of the utility model, the locking assembly is arranged, so that the two functions of angle limiting and locking and unlocking of the traction assembly are realized at the same time, the components are simplified, the cost is reduced, and the operation is convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to endoscope technical field especially relates to a traction wheel locking structure and endoscope. BACKGROUND

[0002] Endoscope is commonly used medical instrument, and the distal end of the insertion part has a active bending section, the active bending section is connected with a traction rope for controlling the bending, the traction rope is wound on a traction wheel, and the traction wheel is connected with a push rod. By pushing the push rod, the traction wheel can be driven to rotate, so that the traction rope is stressed, and the active bending section is further bent.

[0003] In actual use, the bending angle of the active bending section is limited, and the operator often needs to control the active bending end at a certain specific angle. In the prior art, there are many components for limiting the rotation angle of the traction wheel and locking or unlocking, and the assembly is complex. UTILITY MODEL CONTENTS

[0004] The utility model provides a traction wheel locking structure and endoscope at least for realizing the cooperation of the locking and unlocking and angle limiting of the traction assembly in the endoscope.

[0005] In the first aspect, the utility model embodiment provides a traction wheel locking structure which can be used in an endoscope, wherein the endoscope comprises a shell, and the traction wheel locking structure is arranged in the shell. The traction wheel locking structure comprises: a traction assembly, which is rotationally arranged in the shell and comprises a locking part and a limiting part; and a locking assembly, which is movable relative to the locking part to lock or release the locking part, is used for locking or unlocking the traction assembly, and rotationally limits the limiting part at any position.

[0006] In some embodiments of the utility model, the locking assembly moves along the traction assembly radially between a first position and a second position.

[0007] In some embodiments of the utility model, the locking assembly comprises a rotating piece and a pressing piece, the pressing piece is slidingly connected to the shell, the rotating piece is rotationally connected to the pressing piece, the rotating piece pushes and pushes the pressing piece by rotating the rotating piece, and drives the pressing piece to move.

[0008] In some embodiments of the utility model, the pressing piece comprises a first pressing part and a second pressing part, the rotating piece is connected between the first pressing part and the second pressing part, the rotating piece pushes the first pressing part to move the pressing piece to the first position or pushes the second pressing part to move the pressing piece to the second position by rotating the rotating piece.

[0009] In some embodiments of the utility model, the first pressing part has a groove, the pressing piece moves to the first position, the rotating piece rotates along the first direction, and the rotating piece abuts against one end of the groove to slide into the groove.

[0010] In some embodiments of the utility model, the first pressing part is provided with a buffer part, the buffer part is located on the sliding-out side of the groove, and the buffer part is used for limiting the rotation amplitude of the rotating piece.

[0011] In some embodiments of the utility model, the buffer part comprises a buffer inclined surface and a blocking surface, the rotating piece rotates along the first direction, the rotating piece rotates out of the groove and abuts against the blocking surface, and / or the rotating piece rotates along a circumferential second direction, and the rotating piece abuts against and locks the blocking surface.

[0012] In some embodiments of the utility model, the second pressing part has an inner arc surface, the pressing piece moves to the second position, the rotating piece abuts against the inner arc surface to fix the pressing piece at the second position, and / or the pressing piece further comprises a damping piece, the damping piece is fixed to the bottom end of the pressing piece, the pressing piece moves to the first position, and the damping piece abuts against the locking part.

[0013] In some embodiments of the utility model, the limiting part comprises a plurality of limiting sub-parts, and the plurality of limiting sub-parts are distributed at intervals in the circumferential direction; and / or, along the moving direction of the locking assembly, limiting pieces are arranged on both sides of the locking assembly, and the limiting pieces are in sliding connection with the locking assembly; and / or, the locking part has protrusions, the protrusions are distributed at intervals on the outer circumferential surface of the locking part, and the protrusions can contact the locking assembly.

[0014] In the second aspect, the utility model provides an endoscope comprising the traction wheel locking structure.

[0015] The utility model has the advantages of:

[0016] The locking structure of the traction wheel is provided with a locking assembly, the locking assembly is movably connected to the shell, the locking assembly is moved, and the locking assembly is locked with the locking part in the traction assembly. At this time, the locking part is limited by the locking assembly and cannot continue to rotate, realizing the locking of the traction assembly; the locking assembly is moved, the locking assembly is separated from the locking part, the traction assembly is unlocked, and can continue to rotate. Further, in the movement process of the traction assembly, the limiting part in the traction assembly is always in rotational limiting cooperation with the locking assembly, realizing the limiting of the rotation angle of the traction assembly. At this time, through the cooperation between the locking assembly and the traction assembly, the rotation angle of the traction assembly can be limited, and the locking and unlocking functions at various angles can be realized, greatly reducing the components required for the traction assembly to realize the angle limiting and locking and unlocking functions, thereby simplifying the assembly process of the shell and the traction assembly and the locking assembly, reducing the waste of production cost and production time, and improving the production and assembly efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings, which are included to provide a further understanding of the present application and are incorporated in and constitute a part of this application, illustrate embodiments of the present application and serve to explain the present application. Features of the present application, both as to organization and method of operation, together with an understanding of the same, can be best understood by reference to the following detailed description, taken in connection with the accompanying drawings in which:

[0018] In the drawings:

[0019] Figure 1 A structure schematic view of an endoscope disclosed for some embodiments of the present application is shown in the figure;

[0020] Figure 2 A partial enlarged view of A part disclosed for some embodiments of the present application is shown in the figure;

[0021] Figure 3 A structure schematic view of the unlocking of the locking assembly and the locking part disclosed for some embodiments of the present application is shown in the figure;

[0022] Figure 4 A structure schematic view of the locking structure of the traction wheel disclosed for some embodiments of the present application is shown in the figure;

[0023] Figure 5 A partial enlarged view of B part disclosed for some embodiments of the present application is shown in the figure;

[0024] Figure 6 A structure schematic view of the locking of the locking assembly and the locking part disclosed for some embodiments of the present application is shown in the figure;

[0025] Figure 7 A cooperation structure schematic view of the locking assembly and the traction assembly disclosed for some embodiments of the present application is shown in the figure;

[0026] Figure 8 A structure schematic view of the locking assembly disclosed for some embodiments of the present application is shown in the figure.

[0027] Explanation of reference signs:

[0028] 100 - traction assembly, 200 - locking assembly, 300 - endoscope, 310 - housing,

[0029] 110 - locking portion, 111 - protrusion, 120 - limiting portion, 121 - limiting sub-portion,

[0030] 210 - rotating member, 220 - pressing member, 230 - limiting member, 221 - first pressing portion, 222 - second pressing portion, 223 - damping member, 2211 - groove, 2212 - buffer portion, 2241 - buffer inclined surface, 2242 - blocking surface, 240 - abutting surface. DETAILED DESCRIPTION

[0031] To make the objectives, technical solutions and advantages of the present application clearer, the following will make a clear and complete description of the technical solutions of the present application in combination with specific embodiments of the present application and corresponding drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not 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.

[0032] In order to facilitate understanding of the embodiments of the present application, the following first introduces the related technologies in combination with application scenarios.

[0033] The active bending section of the endoscope 300 is bent under the control of the traction wheel. In the use process, the rotation angle of the traction wheel (i.e. the bending angle of the active bending section) needs to be limited. Further, in order to help the operator to better operate the endoscope 300, the locking and unlocking members are arranged in the endoscope 300 to fix the bending angle of the active bending section at a certain specific angle for operation.

[0034] However, the existing limiting member and locking member arrangement will occupy a large space in the handle of the endoscope 300, and at the same time, the number of components is large, and the operation process is complex. In view of this, the present application proposes a traction wheel locking structure and an endoscope 300, which will be described below in combination with Figures 1-8 The technical solutions disclosed in the embodiments of the present application are described.

[0035] The traction wheel locking structure is used in the endoscope 300 and can be arranged in the housing 310 of the endoscope 300. In the use process, the operator can control the traction wheel through the externally connected operating rod or knob and the like.

[0036] In the embodiments of the present application, as Figure 2 , Figure 3 ,Figure 4 As shown, the traction wheel locking structure includes a traction assembly 100 and a locking assembly 200. The traction assembly 100 is rotatable relative to the housing 310, and the traction assembly 100 further includes a locking portion 110 and a limiting portion 120.

[0037] The locking assembly 200 is movable relative to the locking portion 110, and the locking assembly 200 can lock or release the locking portion 110 during movement, so as to control locking and unlocking of the traction assembly 100. Further, the locking assembly 200 is in rotational limiting cooperation with the limiting portion 120 at any position on the movement path of the locking assembly 200.

[0038] In some embodiments, the locking portion 110 and the limiting portion 120 can be integrated or separately arranged. For example, as shown in FIG. 1, the locking portion 110 and the limiting portion 120 are arranged on different sides of the same cylinder. Figure 6 As shown, the locking portion 110 and the limiting portion 120 are arranged on different sides of the same cylinder. For example, the locking portion 110 and the limiting portion 120 can be two coaxial semicircles with different diameters, and are arranged on different sides in the circumferential direction. The specific arrangement of the locking portion 110 and the limiting portion 120 is not limited herein.

[0039] In some embodiments, the movement mode of the locking assembly 200 can include multiple modes. For example, the locking assembly 200 can move linearly along the traction assembly 100 in the axial direction relative to the locking portion 110, or move in a curve along the traction assembly 100 in the circumferential direction.

[0040] Specifically, when the locking assembly 200 is locked with the locking portion 110, the locking assembly 200 and the locking portion 110 can be locked in multiple ways, such as abutting, clamping, etc.

[0041] It should be noted that during the movement of the locking assembly 200, the position of the movement does not change the rotation angle of the traction assembly 100 limited by the limiting portion 120. That is, the maximum rotation angle of the traction assembly 100 is only related to the arrangement of the limiting portion 120, and is irrelevant to the movement of the locking assembly 200.

[0042] By setting the locking assembly 200 in the traction wheel locking structure, moving the locking assembly 200, the locking of the locking assembly 200 and the locking part 110 in the traction assembly 100 is realized. At this time, the locking part 110 is limited by the locking assembly 200 and cannot continue to rotate, realizing the fixation of the rotation angle of the traction assembly 100; when unlocking is needed, only the locking assembly 200 needs to be moved to separate the locking assembly 200 from the locking part 110, and the traction assembly 100 loses the limitation and can continue to rotate. Further, in the movement process of the traction assembly 100, the limiting part 120 in the traction assembly 100 always rotates with the limiting part 120 in the traction assembly 100, realizing the limiting of the rotation angle of the traction assembly 100. At this time, through the cooperation between the locking assembly 200 and the traction assembly 100, the rotation angle of the traction assembly 100 can be limited, and the locking and unlocking functions at various angles can be realized, greatly reducing the components required for the traction assembly 100 to realize the angle limiting and locking and unlocking functions, thereby simplifying the assembly process of the shell 310 and the traction assembly 100 and the locking assembly 200, reducing the waste of production cost and production time, and improving the production and assembly efficiency.

[0043] In some embodiments, the locking assembly 200 moves along the radial direction of the traction assembly 100 between the first position and the second position. When the locking assembly 200 moves to the first position, as shown in Figure 5 、 Figure 6 , the locking assembly 200 abuts against the locking part 110 in the traction assembly 100 to limit the rotation of the traction assembly 100. When the locking assembly 200 moves to the second position, as shown in Figure 2 、 Figure 3 , the locking assembly 200 is separated from the locking part 110, and the rotation locking of the traction assembly 100 is released, and the traction assembly 100 can continue to rotate.

[0044] By setting the locking assembly 200 to move along the radial direction of the traction assembly 100, the operator can control the movement of the locking assembly 200 from the outside of the shell 310 through the control lever or knob. In addition, by setting the movement range of the locking assembly 200 between the first position and the second position, the displacement of the locking assembly 200 can be reduced on the basis of realizing the function of the locking assembly 200. On the one hand, it is convenient for the operator to operate and control, and on the other hand, it can reduce the space occupied by the movement in the shell 310, and avoid affecting other components in the shell 310 during the movement process.

[0045] In some embodiments, as shown in Figure 3 、 Figure 6As shown, the locking assembly 200 further comprises a rotating member 210 and a pressing member 220. The rotating member 210 is rotatably connected to the pressing member 220, and the pressing member 220 is slidable relative to the housing 310. By rotating the rotating member 210, the rotating member 210 can abut against the pressing member 220, and the pressing member 220 can be pushed and moved according to the movement of the rotating member 210.

[0046] Specifically, the rotating member 210 can be a component of any shape. For example, the rotating member 210 can be a cam.

[0047] By rotating the rotating member 210 to control the movement of the pressing member 220, the rotating member 210 occupies less space compared to the movement control mode. Moreover, the operator of the endoscope 300 can control the rotating member 210 to rotate by rotation, which is more convenient and faster than vertical movement, and optimizes the user experience of the operator.

[0048] In some embodiments, the pressing member 220 comprises a first pressing portion 221 and a second pressing portion 222. The rotating member 210 is rotatably connected between the first pressing portion 221 and the second pressing portion 222. As shown, Figure 3 Figure 6 When the rotating member 210 is rotated, the rotating member 210 abuts against the first pressing portion 221 and the second pressing portion 222, respectively. When the rotating member 210 abuts against the first pressing portion 221, the first pressing portion 221 is pushed downward, and at this time, the pressing member 220 moves downward to abut against and lock the locking portion 110. When the rotating member 210 abuts against the second pressing portion 222, the second pressing portion 222 is pushed upward, and at this time, the pressing member 220 moves upward to abut against and unlock the locking portion 110.

[0049] In some embodiments, the first pressing portion 221 and the second pressing portion 222 can be arranged on the same side or opposite sides of the pressing member 220.

[0050] For example, as shown, Figure 6 the first pressing portion 221 is arranged on the lower side of the pressing member 220, and the second pressing portion 222 is arranged on the upper side of the pressing member 220.

[0051] It should be noted that the up, down, left and right directions in the present application can refer to the corresponding directions shown in the accompanying drawings Figure 6 .

[0052] By arranging the first pressing portion 221 and the second pressing portion 222, the rotating member 210 only needs to rotate between the first pressing portion 221 and the second pressing portion 222, without the need for 360-degree rotation, which greatly shortens the rotation distance of the rotating member 210, optimizes the operation process of the user, and simplifies the rotation path of the rotating member 210. ​

[0053] In some embodiments, as shown in FIG. 2A, the first pressing part 221 has a groove 2211. When the rotating member 210 is rotated in a first direction to move the pressing member 220 to the first position, one end of the rotating member 210 abuts with one end of the groove 2211. When the rotating member 210 is continuously rotated in the first direction, the rotating member 210 slides into the groove 2211. The first direction refers to clockwise or counterclockwise direction. At this time, the rotating member 210 is located in the groove 2211 and fixes the pressing member 220 at the first position, realizing the locking of the traction assembly 100. Figure 3 , Figure 6 The depth of the groove 2211 is related to the size of the rotating member 210. Specifically, the depth of the groove 2211 needs to satisfy that when the bottom of the groove 2211 abuts with the rotating member 210, the pressing member 220 also abuts with the locking part 110. Thus, when the rotating member 210 has a gap with the groove 2211, the offset of the pressing member 220 in its movement direction will not affect the locking effect of the pressing member 220 on the locking part 110.

[0054] In some embodiments, the groove 2211 can be set as needed, and the shape and size of the groove 2211 are not limited herein.

[0055] By setting the groove 2211 on the first pressing member 220, the rotation of the rotating member 210 can be limited by the recess caused by the groove 2211. When the rotating member 210 slides into the groove 2211, the operator cancels the rotation control of the rotating member 210, and the rotating member 210 can still be kept at the position by the groove 2211, thereby ensuring that the pressing member 220 also stays at the first position, so as to lock the traction assembly 100. Further, the rotating member 210 first abuts with one end of the groove 2211 and then slides into the groove 2211, and a large force change occurs in this process. The user can get a tactile prompt through the force change, prompting the user that the traction assembly 100 has been locked at this position.

[0056] In some embodiments, the first pressing part 221 further has a buffer part 2212 located at the sliding-out side of the groove 2211. As shown in FIG. 2A, the buffer part 2212 is used to limit the rotation amplitude of the rotating member 210 in the first direction.

[0057] Specifically, the buffer part 2212 can be realized in various ways. For example, the buffer part 2212 can be an arc surface extending outward from the side of the groove 2211. Figure 6

[0058] Specifically, the buffer part 2212 can be realized in various ways. For example, the buffer part 2212 can be an arc surface extending outward from the side of the groove 2211.

[0059] ​By setting the buffer portion 2212, the rotation amplitude of the rotating member 210 in the first direction can be limited, so as to avoid the rotation direction of the rotating member 210 from being out of control.

[0060] In some embodiments, the buffer portion 2212 comprises a buffer slope 2241 and a blocking surface 2242. When the rotating member 210 rotates in the first direction, the rotating member 210 rotates out of the groove 2211 and abuts against the blocking surface 2242. When the rotating member 210 rotates in the second direction, the rotating member 210 abuts against the blocking surface 2242 and pushes the pressing member 220 downward to the first position. The traction assembly 100 can be locked, and when the operator releases the control of the rotating member 210, the traction assembly 100 is unlocked. The second direction is opposite to the first direction, i.e., when the first direction is clockwise, the second direction is counterclockwise.

[0061] By setting the blocking surface 2242, the traction assembly 100 can be locked regardless of the rotation direction of the rotating member 210. The operator can determine whether to fix the traction assembly 100 or temporarily lock the traction assembly 100 according to the use requirement, which optimizes the locking function of the locking assembly 200, improves the use process, and improves the operation efficiency of the components.

[0062] In some embodiments, as shown in Figure 6 The second pressing portion 222 is provided with an inner arc surface. When the pressing member 220 moves upward to the second position, the end point of the rotating member 210 abuts against the inner arc surface, fixing the pressing member 220 at the second position.

[0063] Specifically, the curvatures of the inner arc surfaces can be the same or different.

[0064] By setting the inner arc surfaces, the rotating member 210 can be further fitted with the rotation arc, so that the pressing member 220 can be uniformly moved, the resistance is gradually increased, and the operator can be more convenient to operate.

[0065] Further, the bottom end of the pressing member 220 is further provided with a damping member 223. When the pressing member 220 moves to the first position, the damping member 223 abuts against the locking portion 110. The damping member 223 can be made of rubber or other materials with large self-friction resistance. The damping member 223 can be provided with structures such as recesses, protrusions, etc. that can increase the friction resistance.

[0066] The bottom surface of the damping member 223 can also be provided with a shape that is matched with the outer surface of the locking portion 110, so as to increase the contact area between the two, thereby increasing the friction and achieving a more secure locking between the two.

[0067] Exemplarily, the damping member 223 can be made of a flexible material, and when the damping member 223 abuts against the locking portion 110, the damping member 223 can elastically deform to further lock the locking portion 110.

[0068] In some embodiments, as shown in Figure 5 The locking portion 110 is provided with a protrusion 111, and when the pressing member 220 is in the first position, the protrusion 111 is in contact with the bottom surface of the pressing member 220. The protrusion 111 is used to increase the frictional resistance between the locking portion 110 and the pressing member 220. The protrusion 111 can be arranged at intervals in the circumferential direction of the locking portion 110.

[0069] Specifically, the protrusion 111 can be distributed on the outer circumferential surface of the locking portion 110 in various ways. Exemplarily, the protrusion 111 is distributed in point form on the outer circumferential surface of the locking portion 110. Exemplarily, the protrusion 111 can be in the form of a long strip and be distributed in gear-like intervals in the circumferential direction on the outer circumferential surface of the locking portion 110. The arrangement of the protrusion 111 is not limited herein.

[0070] By arranging the damping member 223 and / or the protrusion 111, the frictional resistance between the locking member and the pressing member 220 can be further increased, thereby avoiding the pressing member 220 from slipping or deviating in position when locking with the locking portion 110, and reducing the locking stability of the pressing member 220 and the locking member. Further, increasing the frictional resistance between the pressing member 220 and the locking portion 110 can also reduce the force required to be applied by the operator when locking, making the locking operation simpler and easier to perform, and optimizing the user experience of the operator.

[0071] In some embodiments, the limiting portion 120 can be arranged in various ways. Exemplarily, as shown in Figure 5 The limiting portion 120 can include a plurality of limiting sub-portions 121, and the plurality of limiting sub-portions 121 are arranged at intervals in the circumferential direction.

[0072] The two abutting surfaces 240 of the limiting portion 120 abut against the pressing member 220 to limit the rotation angle of the traction assembly 100. Exemplarily, as shown in Figure 7 The radial distance of the limiting portion 120 is greater than the radial distance of the locking portion 110. At this time, at least part of the pressing member 220 is located between the limiting portion 120 and the locking portion 110 in the radial direction of the traction assembly 100.

[0073] For another example, as shown in Figure 6 The radial distance of the limiting portion 120 is less than the radial distance of the locking portion 110, and at this time, the pressing member 220 extends to the locking portion 110 along the two sides, and at least part of the pressing member 220 is located between the limiting portion 120 and the locking portion 110 in the radial direction of the traction assembly 100.

[0074] In some embodiments, the limiting sub-parts 121 can be provided as a toothed structure.

[0075] The limiting sub-parts 121 are arranged at intervals in the circumferential direction, and the number of the limiting sub-parts 121 can be changed to control the rotation angle of the traction assembly 100, so as to facilitate adjustment of the maximum angle limit of the traction assembly 100.

[0076] In some embodiments, as shown in Figure 6 , Figure 7 , Figure 8 The limiting members 230 are arranged on both sides of the moving direction of the locking assembly 200 and are in sliding connection with the locking assembly 200. The limiting members 230 are used to limit the movement path of the locking assembly 200.

[0077] By arranging the limiting members 230, the movement path of the locking assembly 200 can be limited, so as to avoid deviation of the movement path of the locking assembly 200, which cannot realize normal use of the locking assembly 200 or affect other components in the shell 310. On the other hand, the limiting members 230 can protect the movement path of the locking assembly 200, so as to avoid interference or obstruction of other components on the movement path.

[0078] The embodiment of the utility model further includes a kind of endoscope 300, which includes the traction wheel locking structure described above.

[0079] It should be noted that the endoscope 300 involved in the embodiment of the utility model can be a bronchoscope, a nephroscope, an esophagoscope, a gastroscope, a colonoscope, an otoscope, a nasoscope, an oral cavity mirror, a laryngoscope, a colposcope, a laparoscope, an arthroscope, etc. The type of endoscope 300 is not specifically limited in the embodiment of the utility model.

[0080] The differences between various embodiments are mainly described in the above embodiment of the utility model. The optimization features different between various embodiments can be combined to form a more optimal embodiment as long as they are not contradictory. Considering the simplicity of writing, it will not be repeated here.

[0081] The above only describes the embodiments of the utility model and is not used to limit the utility model. The utility model can be changed and varied in various ways for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model shall be included in the scope of claims of the utility model.

Claims

1. A traction wheel locking structure characterized by comprising: The endoscope (300) can be used, the endoscope (300) includes a shell (310), the traction wheel locking structure is arranged in the shell (310), the traction wheel locking structure includes: A traction assembly (100) is rotationally arranged in the shell (310), the traction assembly (100) includes a locking portion (110) and a limiting portion (120); A locking assembly (200) can be moved relative to the locking portion (110) to lock or release the locking portion (110), for locking or unlocking the traction assembly (100), and the locking assembly (200) is rotationally limited with the limiting portion (120) at any position.

2. The traction wheel locking structure according to claim 1, characterized by The locking assembly (200) moves radially along the traction assembly (100) between a first position and a second position.

3. The traction wheel locking structure according to claim 2, characterized by The locking assembly (200) includes a rotating member (210) and a pressing member (220), the pressing member (220) is slidably connected to the shell (310), the rotating member (210) is rotatably connected to the pressing member (220), rotating the rotating member (210), the rotating member (210) pushes the pressing member (220) to move.

4. The traction wheel locking structure according to claim 3, characterized by The pressing member (220) includes a first pressing portion (221) and a second pressing portion (222), the rotating member (210) is connected between the first pressing portion (221) and the second pressing portion (222), rotating the rotating member (210), the rotating member (210) pushes the first pressing portion (221) to move the pressing member (220) to the first position, or pushes the second pressing portion (222) to move the pressing member (220) to the second position.

5. The traction wheel locking structure according to claim 4, characterized by The first pressing portion (221) has a groove (2211), the pressing member (220) moves to the first position, the rotating member (210) rotates in a first direction, and the rotating member (210) abuts one end of the groove (2211) to slide into the groove (2211).

6. The traction wheel locking structure according to claim 5, characterized by The first pressing portion (221) is provided with a buffer portion (2212), the buffer portion (2212) is located on the sliding side of the groove (2211), and the buffer portion (2212) is used to limit the rotation amplitude of the rotating member (210).

7. The traction wheel locking structure according to claim 6, characterized by The buffer portion (2212) includes a buffer inclined surface (2241) and a blocking surface (2242), the rotating member (210) rotates in the first direction, and the rotating member (210) rotates out of the groove (2211) and abuts the blocking surface (2242); And / or, the rotating member (210) rotates in a circumferential second direction, and the rotating member (210) abuts and locks with the blocking surface (2242).

8. The traction wheel locking structure according to claim 4, characterized by The second pressing portion (222) has an inner arc surface, the pressing member (220) moves to the second position, the rotating member (210) abuts the inner arc surface to fix the pressing member (220) at the second position; And / or, the pressing part (220) further comprises a damping part (223) fixed to the bottom end of the pressing part (220), the pressing part (220) moves to the first position, and the damping part (223) abuts against the locking part (110).

9. The traction wheel locking structure according to claim 1, characterized by, The limiting part (120) comprises a plurality of limiting sub-parts (121) which are distributed at intervals in the circumferential direction. And / or, along the moving direction of the locking assembly (200), a limiting part (230) is arranged on both sides of the locking assembly (200), and the limiting part (230) is in sliding connection with the locking assembly (200). And / or, the locking part (110) has protrusions (111) which are distributed at intervals on the outer circumferential surface of the locking part (110), and the protrusions (111) can contact the locking assembly (200).

10. An endoscope (300) characterized by, The traction wheel locking structure comprises the traction wheel locking structure according to any one of claims 1-9.

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