CN219183645U - Traction wheel, traction rope adjusting structure, endoscope handle and endoscope - Google Patents

Abstract

The utility model relates to the technical field of endoscopes, in particular to a traction wheel, a traction rope adjusting structure, an endoscope handle and an endoscope, wherein the traction wheel comprises a traction wheel main body and a pushing component, an accommodating space and an opening communicated with the accommodating space are formed in the peripheral side wall of the traction wheel main body, a traction rope stretches into the accommodating space through the opening, an installation position is formed at the accommodating space of the traction wheel main body, the pushing component comprises an installation cover and a pushing component, the installation cover is assembled to the installation position, the pushing component is movably arranged on the installation cover along the radial direction of the traction wheel main body, and at least part of the pushing component stretches into the accommodating space and is used for being connected with the traction rope; the tension of the traction rope can be adjusted by the aid of the scheme.

Description

Traction wheel, traction rope adjusting structure, endoscope handle and endoscope

Technical Field

The utility model relates to the technical field of endoscopes, in particular to a traction wheel, a traction rope adjusting structure, an endoscope handle and an endoscope.

Background

The endoscope is a medical instrument which stretches the insertion part into the human body, and observes the internal tissues of the human body through the camera module at the distal end of the insertion part, so that doctors can be helped to judge the pathological change position and the tissue structure characteristics of the pathological change position in the patient.

The endoscope comprises an operating handle and an inserting part, and in actual operation, the pulling rod on the operating handle is pulled to drive the traction wheel to rotate, so that the traction rope is driven to pull the bending section at the far end of the inserting part to conduct posture adjustment, the direction of the front end module is adjusted, and the functions of fixed point observation and the like are realized. In the related art, the pulling rope can only adjust the tightness during production and assembly, and when the pulling rope is excessively tightened or loosened during the use process of the endoscope, the adjusting precision of the bending section is reduced, so that the expected bending effect is difficult to realize.

Disclosure of Invention

In view of the above, it is desirable to provide a traction wheel, a traction rope adjusting structure, an endoscope handle, and an endoscope.

In order to solve the problems, the utility model adopts the following technical scheme:

in a first aspect, an embodiment of the present application provides a traction wheel, the traction wheel is used for winding up the haulage rope of establishing the endoscope, the traction wheel includes traction wheel main part and top pushing component, accommodation space has been seted up to the week lateral wall of traction wheel main part and with the opening that accommodation space is linked together, the haulage rope is via the opening stretches into in the accommodation space, the traction wheel main part is in accommodation space department forms the installation position.

The pushing component comprises a mounting cover and a pushing piece, the mounting cover is assembled to the mounting position, the pushing piece is movably arranged on the mounting cover along the radial direction of the traction wheel main body, and at least part of the pushing piece stretches into the accommodating space and is used for being connected with the traction rope.

Further, the mounting cover is slidably assembled to the mounting position in a radial direction of the traction wheel body, and when the mounting cover is assembled to the mounting position, an orifice is formed between the mounting cover and the peripheral side wall of the traction wheel body, and the orifice is used for the traction rope to extend into the accommodating space.

Further, the traction wheel main body is provided with a traction rope mounting groove extending along the circumferential direction of the traction wheel main body, the traction rope mounting groove is used for positioning and mounting part of the traction rope, and the traction rope mounting groove is in butt joint with the orifice at the mounting position.

Further, the pushing piece is in threaded fit with the mounting cover, and the pushing piece can rotate along with the pushing piece to move along the radial direction of the traction wheel main body.

Further, the pushing assembly further comprises an abutting piece, and the abutting piece is rotatably connected to the distal end of the pushing piece.

Further, the abutting piece is provided with an arc-shaped abutting surface, and the abutting surface is arranged opposite to the pushing piece in a protruding mode.

Further, the abutting piece is further provided with a limiting groove, and the abutting surface is limited in the limiting groove.

In a second aspect, an embodiment of the present application provides a traction rope adjusting structure, including traction rope and aforesaid traction wheel, the traction rope is located along circumference cover traction wheel main part, just the part of traction rope is located accommodation space is interior and be used for with the top pushes away the piece and links to each other.

In a third aspect, embodiments of the present application provide an endoscope handle comprising a housing and the aforementioned pull-cord adjustment structure disposed within the housing.

In a fourth aspect, embodiments of the present application provide an endoscope comprising an insertion portion and the aforementioned endoscope handle, the proximal end of the insertion portion being connected to the endoscope handle.

The technical scheme adopted by the utility model can achieve the following beneficial effects:

the traction wheel, the traction rope adjusting structure, the endoscope handle and the endoscope disclosed by the application are characterized in that the proximal end part of the traction rope is wound on the traction wheel main body, the part of the traction rope stretches into the accommodating space through the opening, the pushing piece in the pushing assembly is connected with the traction rope in the accommodating space, and the pushing piece moves along the radial direction of the traction wheel main body, so that the traction rope is pulled tightly or released, and the aim of adjusting the tightness of the traction rope is achieved;

the installation cover of the second pushing component is arranged in the accommodating space of the traction wheel main body, which is equivalent to the space in the traction wheel main body, so that the occupied space of the traction rope adjusting structure in the endoscope handle is reduced, and the compactness of the structure is improved;

thirdly, the pushing piece moves along the radial direction of the traction wheel main body in a spiral screwing or spiral screwing-back mode, the threaded fit has the advantage of stepless adjustment, the distal end part of the pushing piece can be positioned at any position on the running path of the pushing piece, the traction of the endoscope can be always adjusted to a proper tightness in the use process, and therefore the bending action precision of the bending section of the insertion part is improved;

fourth, the arc butt face of butt spare is unanimous with the crooked direction of haulage rope, can avoid the haulage rope to receive great shearing force and take place the condition of rupture in the corner of butt spare, and the arc butt has played the guard action to the haulage rope promptly.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic structural view of a traction sheave body of an embodiment of the present application;

FIG. 2 is a schematic view of the internal structure of the mounting location;

FIG. 3 is a schematic view of the pushing assembly of an embodiment of the present application;

FIG. 4 is a schematic view of the structure of a mounting cover of an embodiment of the present application;

FIG. 5 is a schematic view of the interfacing of the pusher assembly with the traction wheel body of an embodiment of the present application;

FIG. 6 is a schematic structural view of a traction sheave of an embodiment of the present application;

FIG. 7 is a schematic diagram of an assembly of a traction rope and traction wheel according to an embodiment of the present application;

FIG. 8 is a schematic view of an embodiment of a haulage rope abutting a pushing member;

fig. 9 is a schematic structural view of an abutment according to an embodiment of the present application.

In the figure:

100-traction wheel main body, 110-accommodating space, 120-installation position, 130-orifice, 140-traction rope installation groove, 150-positioning part, 160-buckling position and 170-limit rope groove; 200-pushing components, 210-mounting covers, 211-mounting cover substrates, 212-retaining walls, 213-accommodating grooves, 214-buckles, 220-pushing parts, 230-abutting parts, 231-abutting surfaces and 232-limiting grooves; 300-pulling rope; 400-a housing; 500-insert.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, based on the examples herein, which are within the scope of the utility model as defined by the claims, will be within the scope of the utility model as defined by the claims.

The terms first, second and the like in the description and in the claims, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged, as appropriate, such that embodiments of the present application may be implemented in sequences other than those illustrated or described herein, and that the objects identified by "first," "second," etc. are generally of a type and not limited to the number of objects, e.g., the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.

In the utility model, the 'near end' and the 'far end' are far and near positions of the structure relative to human body operation under the use environment, so that the description of the position relationship among the components is convenient, and meanwhile, the understanding is convenient; the "proximal" and "distal" are relative positional relationships, not absolute.

The traction wheel, the traction rope adjusting structure, the endoscope handle and the endoscope provided by the embodiment of the application are described in detail below by means of specific embodiments and application scenes thereof with reference to fig. 1 to 9.

Referring to fig. 1 to 6, an embodiment of the present application discloses a traction wheel for winding a traction rope 300 of an endoscope, the disclosed traction wheel includes a traction wheel main body 100 and a pushing component 200, wherein the traction wheel main body 100 is a basic component of the traction wheel, and can provide a mounting foundation for the pushing component 200, and the two components are connected to form the traction wheel of the embodiment of the present application.

In this embodiment, the traction rope main body 100 is integrally in a wheel shape, the circumferential side wall of the traction rope main body 100 is provided with a containing space 110 and an opening communicated with the containing space 110, the traction rope 300 extends into the containing space 110 through the opening, the traction rope main body 100 forms a mounting position 120 for mounting the pushing component 200 at the containing space 110, and the pushing component 200 is assembled at the mounting position 120 and used for adjusting the tightness of the traction rope 300.

Specifically, the pushing assembly 200 includes a mounting cover 210 and a pushing member 220, it should be understood that in the embodiment of the present application, the accommodating space 110 of the traction wheel main body 100 can provide an accommodating space for the pushing assembly 200, the mounting cover 210 may be disposed in the accommodating space 110, the pushing member 220 is movably disposed on the mounting cover 210 along the radial direction of the traction wheel main body 100, the pushing member 220 may have a rod-shaped structure, and at least a portion of the pushing member 220 extends into the accommodating space 110 and is used for being connected with the traction rope 300. When the pushing member 220 moves radially inward, which is equivalent to pulling the proximal end of the pulling rope 300 in the opposite direction toward the distal end, the proximal end of the pulling rope 300 is driven to approach toward the distal end thereof to gradually increase the tension; when the pushing member 220 moves radially outward, the portion of the traction rope 300 extending into the accommodating space 110 is gradually released, i.e., the tension of the traction rope 300 is reduced, thereby gradually increasing the slack of the traction rope 300. That is, the pushing member 220 moves along the radial direction of the traction wheel body 100, so as to adjust the tightness of the traction rope 300.

It should be noted that the tension and the slack of the traction rope 300 are relative concepts of different states, wherein the tension may be used to characterize the traction rope 300 in a relaxed state, for example, the traction rope 300 in the former state is in a relaxed state, and the traction rope 300 in the latter state may still be in a relaxed state after being moved radially inward by driving the pushing member 220, but the slack thereof may be smaller than that in the former state, in which case the tension of the traction rope 300 is increased. The slack may be used to characterize the traction rope 300 in a tensioned state, e.g., the traction rope 300 in the former state is in a tensioned state, and the traction rope 300 in the latter state is still in a tensioned state after being moved radially outward by driving the pusher 220, but the slack of the traction rope tends to be smaller than in the former state, in which case the slack of the traction rope increases.

It should be noted that, in the embodiment of the present application, the pushing member 220 is connected to the pulling rope 300, which may include a contact connection manner that the distal end portion of the pushing member 220 abuts against the pulling rope 300, because the pulling rope 300 is pulled by the distal end thereof, the pulling rope 300 can still maintain the abutting state against the pushing member 220 even if the pulling rope 300 is switched from the tensioned state to the loose state.

Of course, in some embodiments of the present application, the pushing member 220 is connected to the pulling rope 300, and may further include a manner of directly connecting the pulling rope 300 to the pushing member 220, for example, the pulling rope 300 is disposed in a mounting hole formed at a front end portion of the pushing member 220, and the pulling rope 300 is linked with the pushing member 220, that is, the pushing member 220 can push the pulling rope 300 inwards or pull the pulling rope 300 outwards, so as to achieve the purpose of adjusting the tightness of the pulling rope 300.

In the technical solution of the embodiment of the application, the proximal end portion of the traction rope 300 is wound on the traction wheel main body 100, and the portion of the traction rope 300 extends into the accommodating space 110 through the opening, the pushing piece 220 in the pushing assembly 200 is connected with the traction rope 300 in the accommodating space 110, and the pushing piece 220 moves along the radial direction of the traction wheel main body 100, so that the traction rope 300 is pulled tightly or the traction rope 300 is released, and the purpose of adjusting the tightness of the traction rope 300 is achieved.

It can be understood that the traction wheel is used as a bearing base of the traction rope 300, and when the traction rope 300 and the traction wheel are assembled, the traction rope 300 is circumferentially sleeved on the traction wheel main body 100, that is, a part of the traction rope 300 is wound on the traction wheel main body 100, so that when the traction wheel is rotated, the bending section of the insertion part 500 of the endoscope can be pulled by winding the traction rope 300 to realize bending action, thereby changing the distal end orientation of the insertion part 500 of the endoscope so as to adjust the shooting direction of the camera or the working area of the medical instrument.

Referring to fig. 5 and 6, the traction wheel body 100 is provided with a traction rope mounting groove 140 extending in a circumferential direction thereof, and the traction rope mounting groove 140 is used for positioning a part of the traction rope 300, i.e., a proximal end part of the traction rope 300 is wound in the traction rope mounting groove 140, and the traction rope mounting groove 140 constrains the traction rope 300 disposed therein, thereby ensuring that the traction rope 300 extends in the circumferential direction and is sleeved on the traction wheel body 100, and also preventing the traction rope 300 from being separated from the traction wheel body 100.

In the embodiment of the present application, the mounting cover 210 may be slidably mounted to the mounting location 120 along the radial direction of the traction wheel body 100, and when the mounting cover 210 is mounted to the mounting location 120, an aperture 130 is formed between the mounting cover 210 and the circumferential sidewall of the traction wheel body 100, and the aperture 130 is used for the traction rope 300 to extend into the accommodating space 110, it should be understood that in the embodiment of the present application, the traction rope mounting groove 140 is butted with the aforementioned aperture 130 at the mounting location 120.

Based on the above scheme, before the installation cover 210 and the traction wheel main body 100 are assembled, both have an open groove structure that is butted to form the orifice 130, and when the traction rope 300 is assembled, only a part of the traction rope 300 needs to be stretched into the accommodating space 110, and the installation cover 210 is assembled, so that the assembly is convenient. Of course, in some embodiments of the present application, the aperture 130 may also be separately formed in the peripheral wall of the traction wheel body 100 or the mounting cover 210, which is not limited in this application.

In the embodiment of the application, the mounting cover 210 includes a mounting cover base 211 and blocking walls 212 disposed on two opposite sides of the mounting cover base 211, and a receiving slot 213 is defined between the mounting cover base 211 and the two blocking walls 212, that is, the mounting cover 210 is in a slot structure as a whole, the pushing member 220 is movably disposed on the mounting cover base 211, and a distal end portion of the pushing member 220 is movably disposed in the receiving slot 213; when the installation cover 210 is assembled into the accommodating space 110, the blocking wall 212 and the inner wall of the accommodating space 110 have larger fitting contact area, so that the stability of the installation cover 210 assembled into the accommodating space 110 can be improved, the condition that the installation cover 210 shakes relative to the traction wheel main body 100 is avoided, and the reliability of tightness adjustment of the traction rope 300 is ensured.

Further, the traction wheel main body 100 is provided with a positioning part 150 matched with the mounting cover 210 at the mounting position 120, and the mounting cover 210 is matched with the positioning part 150 in a positioning way in the circumferential direction of the traction wheel main body 100, so that the stability of the assembly of the mounting cover 210 and the traction wheel main body 100 is further improved.

The positioning portion 150 is provided with a limiting rope groove 170, and the pushing member 220 pushes the traction rope 300 to move at a limiting position, namely, the traction rope is pushed into the limiting rope groove 170 at the joint of the mounting cover 210 and the positioning portion 150, and the situation of excessive tensioning of the traction rope 300 can be avoided based on the limiting effect of the positioning portion 150 on the pushing member 220.

In a further technical solution, the width of the mounting cover 210 from the proximal end to the distal end is gradually smaller, for example, the whole mounting cover 210 may have a fan-shaped, fan-like or cone-shaped structure, so that when the mounting cover 210 is assembled into the accommodating space 110, the distal end portion of the mounting cover 210 first enters the accommodating space 110 through the opening, and the distal end portion of the mounting cover 210 is smaller than the width of the opening, so that the mounting cover 210 is easy to be placed into the accommodating space 110, thereby improving the convenience of assembling the two, and it should be understood that the positioning portion 150 matches with the outline shape and the size of the portion of the mounting cover 210 inserted into the accommodating space 110.

Referring to fig. 3 to 6, in the embodiment of the present application, when the mounting cover 210 is disposed in the accommodating space 110, a buckle 214 is disposed on the outer side of the blocking wall 212, a buckling position 160 is disposed on the inner wall of the accommodating space 110, and the mounting cover 210 and the traction wheel main body 100 are connected and fixed by the buckling cooperation between the buckle 214 and the buckling position 160; of course, in other embodiments of the present application, the buckle 214 may be disposed on the inner wall of the accommodating space 110, and the buckle 160 may be disposed on the outer side of the blocking wall 212.

It should be appreciated that in some embodiments of the present application, the mounting cover 210 may also be fixedly coupled to the traction sheave body 100 by way of glue, interference fit, etc., and the present application is not limited in particular.

In an alternative embodiment, the pushing member 220 may be in threaded engagement with the base 211 of the mounting cover, and move along the radial direction of the traction wheel main body 100 in a threaded screwing or screwing-out manner, and the threaded engagement is adopted, so that the method has the characteristics of simple production and processing and convenient assembly; on the other hand, the screw-fit has the advantage of stepless adjustment, and the distal end portion of the pushing member 220 can be positioned at any position on the running path thereof, so that the pulling rope 300 can be always adjusted to a proper tightness in the use process of the endoscope, and the bending action precision of the bending section of the insertion portion 500 is improved.

It should be noted that, when the pushing member 220 is connected to the mounting cover base 211 in a threaded manner, the pushing assembly 200 may further include a locking member, the locking member is screwed and sleeved on the pushing member 220, and the locking member is located at the outer side of the mounting cover base 211, and when the pushing member 220 is rotated to move to the traction rope 300 with a proper tightness, the rotatable locking member abuts against the outer side of the mounting cover base 211 to lock the rotation of the pushing member 220, thereby preventing the tightness of the traction rope 300 from being changed due to loose rotation of the pushing member 220.

In other embodiments of the present application, the mounting cover substrate 211 may be provided with a hole through which the pushing element 220 passes, the inner wall of the hole is provided with a plurality of clamping grooves, the outer wall of the pushing element 220 is provided with clamping protrusions, the pushing element 220 can be moved and positioned at different positions in the hole by clamping the clamping protrusions into different clamping grooves, so that the tightness of the traction rope 300 is adjusted, the pushing element 220 is prevented from being driven to move with larger resistance, the clamping protrusions can be ball heads of connecting springs, and the clamping grooves can be spherical grooves.

It should be understood that the present application is not limited to the specific arrangement of the pushing member 220 movably along the traction wheel body 100, as long as the pushing member 220 can move radially along the traction wheel body 100 and can be positioned at different positions.

As can be seen from the foregoing, the pushing member 220 may move along the radial direction of the traction wheel main body 100 in a spiral screwing manner or a spiral screwing manner, that is, the pushing member 220 may rotate around its axis, in which case, there is a large friction abrasion between the pushing member 220 and the traction rope 300, and there may be a situation that the traction rope 300 breaks, or a situation that the traction rope 300 is twisted around the pushing member 220. Based on the above, in the embodiment of the present application, the pushing component 200 may further include an abutment member 230, where the abutment member 230 is rotatably connected to the distal end of the pushing member 220, and during the screwing or unscrewing process of the pushing member 220, because the abutment member 230 is limited by the two blocking walls 212, the abutment member 230 slides only relative to the mounting cover 210, so as to avoid the situation that the pushing member 220 is in rotational contact with the traction rope 300 to cause greater frictional wear or the traction rope 300 is twisted.

In a further technical solution, the abutment member 230 has an arc-shaped abutment surface 231, the abutment surface 231 protrudes away from the pushing member 220, when the traction rope 300 is abutted by the abutment member 230, the traction rope 300 bends at the abutment position, the arc-shaped abutment surface 231 is consistent with the bending direction of the traction rope 300, and the situation that the traction rope 300 is broken due to larger shearing force at the corner of the abutment member 230 can be avoided, that is, the arc-shaped abutment surface 231 plays a protective role on the traction rope 300.

In a further technical solution, the abutting piece 230 is further provided with a limiting groove 232, and the abutting surface 231 is limited in the limiting groove 232, that is, the abutting surface 231 is a wall surface of the bottom wall of the limiting groove 232, and the limiting groove 232 is restrained against the traction rope 300 arranged in the limiting groove, so that the traction rope 300 is prevented from being separated in the abutting process, and the stability and reliability of tightness adjustment of the traction rope 300 are improved.

In the foregoing solution, the accommodating space 110 of the traction wheel main body 100 provides an accommodating space for the pushing component 200, so that the pushing component 200 is disposed in the accommodating space 110, and the aesthetic property and consistency of the appearance of the traction wheel main body 100 can be improved; in some embodiments of the present application, the channel structure formed by the mounting cap 210 may be clamped to the mounting location 120 in an exposed state. That is, the present application does not limit whether the mounting cover 210 is disposed in the traction wheel body 100 or disposed outside the traction wheel body 100, as long as the mounting cover 210 is fixedly mounted on the mounting position 120, the pushing member 220 can move along the radial direction of the traction wheel body 100 relative to the mounting cover 210.

The embodiment of the application also provides a haulage rope adjusting structure, including haulage rope 300 and aforesaid traction wheel, haulage rope 300 is located traction wheel main part 100 along circumference cover, and the part of haulage rope 300 is located accommodation space 110 and is used for linking to each other with pushing away the piece 220, pushes away the radial movement of pushing away piece 220 along traction wheel main part 100 and can adjust the elasticity of haulage rope 300.

The embodiment of the application also provides an endoscope handle, which comprises a shell 400 and the traction rope adjusting structure, wherein the traction rope adjusting structure is arranged in the shell 400.

Embodiments of the present application also provide an endoscope including an insertion portion 500 and the foregoing endoscope handle, where a proximal end of the insertion portion 500 is connected to the endoscope handle, and where the endoscope handle is operated to control a bending posture of a bending section at a distal end of the insertion portion 500.

The endoscope in the embodiment of the application may be a gastroscope, a enteroscope, a laryngoscope, a fiberbronchoscope, etc., and the embodiment of the application does not specifically limit the type of the endoscope.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in an opposite order depending on the functions involved, e.g., the described methods may be performed in an order different from that described, and various steps may also be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any person skilled in the art will readily recognize that changes and substitutions are within the scope of the present utility model.

Claims (10)

1. A traction wheel for winding a traction rope of an endoscope, comprising:

the traction wheel comprises a traction wheel body (100), wherein an accommodating space (110) and an opening communicated with the accommodating space (110) are formed in the circumferential side wall of the traction wheel body (100), the traction rope (300) stretches into the accommodating space (110) through the opening, and the traction wheel body (100) forms an installation position (120) at the accommodating space (110);

the pushing assembly (200), the pushing assembly (200) comprises a mounting cover (210) and a pushing piece (220), the mounting cover (210) is assembled to the mounting position (120), the pushing piece (220) is movably arranged on the mounting cover (210) along the radial direction of the traction wheel main body (100), and at least part of the pushing piece (220) stretches into the accommodating space (110) and is used for being connected with the traction rope (300).

2. The traction wheel of claim 1, wherein the mounting cap (210) is slidably fitted to the mounting location (120) along a radial direction of the traction wheel body (100), wherein an aperture (130) is formed between the mounting cap (210) and a peripheral side wall of the traction wheel body (100) when the mounting cap (210) is fitted to the mounting location (120), the aperture (130) being for the traction rope (300) to extend into the accommodation space (110).

3. Traction wheel according to claim 2, characterized in that the traction wheel body (100) is provided with a traction rope mounting groove (140) extending in its circumferential direction, the traction rope mounting groove (140) being used for positioning a mounting part of the traction rope (300), and the traction rope mounting groove (140) being in abutment with the aperture (130) at the mounting location (120).

4. A traction wheel according to any one of claims 1 to 3, wherein the pushing member (220) is screw-fitted to the mounting cap (210), the pushing member (220) being movable in a radial direction of the traction wheel body (100) as it rotates.

5. The traction wheel of claim 4, wherein the ejector assembly (200) further comprises an abutment (230), the abutment (230) being rotatably connected to the distal end of the ejector (220).

6. Traction wheel according to claim 5, characterized in that the abutment member (230) is provided with an arc-shaped abutment surface (231), which abutment surface (231) is arranged protruding away from the pushing member (220).

7. Traction wheel according to claim 6, wherein the abutment (230) is further provided with a limit groove (232), the abutment surface (231) being limited within the limit groove (232).

8. The traction rope adjusting structure is characterized by comprising a traction rope (300) and the traction wheel according to any one of claims 1-7, wherein the traction rope (300) is circumferentially sleeved on the traction wheel main body (100), and a part of the traction rope (300) is positioned in the accommodating space (110) and is used for being connected with the pushing piece (220).

9. An endoscope handle comprising a housing (400) and the pull-cord adjustment structure of claim 8, said pull-cord adjustment structure being disposed within said housing (400).

10. An endoscope comprising an insertion portion (500) and the endoscope handle of claim 9, wherein the proximal end of the insertion portion (500) is connected to the endoscope handle.

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