CN219921009U - Haulage rope stop gear, endoscope handle and endoscope - Google Patents

Abstract

The utility model provides a haulage rope limiting mechanism, an endoscope handle and an endoscope, and belongs to the technical field of endoscopes. The limiting mechanism comprises a traction rope and a limiting assembly, wherein the traction rope is provided with a pre-tightening member, the limiting assembly is arranged on a moving path of the pre-tightening member and is used for being matched with the pre-tightening member in a stopping and abutting mode so as to limit the moving range of the traction rope. According to the utility model, the pre-tightening structure is limited by the limiting assembly, so that the moving range of the traction rope is limited, and the bending angle of the active bending section is controlled; the limiting component is matched with the pre-tightening structure in a stopping way, and compared with a limiting structure arranged on the deflector rod or the traction wheel, the structure and the installation position of the limiting component are not limited by the deflector rod and the traction wheel, and the design, the production and the assembly of the limiting component are not influenced by the deflector rod and the traction rope, so that the manufacturing difficulty is reduced, and the production efficiency is improved.

Description

Haulage rope stop gear, endoscope handle and endoscope

Technical Field

The utility model belongs to the technical field of endoscopes, and particularly relates to a hauling rope limiting mechanism, an endoscope handle and an endoscope.

Background

The endoscope is widely applied in modern medical treatment, and in specific use, an insertion part of the endoscope enters a human body through a natural cavity, the far end of the insertion part is an active bending section, the active bending section is connected with a traction rope, and the active bending section is bent by pulling the traction rope, so that the bending direction of the active bending section is controlled, and the image information of a target position is acquired.

Because the maximum bending angles of the active bending sections of endoscopes with different specifications and different models are different, the moving range of the traction rope is limited by the related limiting structure, so that the maximum bending angles of the active bending sections are controlled, and the situation that the damage to parts of the active bending sections is caused by overlarge bending angles of the active bending sections is avoided.

In the related art, a traction rope is connected with a traction wheel, a deflector rod is connected to the traction wheel, and the rotation of the traction wheel is controlled by stirring the deflector rod, so that the movement of the traction rope is controlled; in order to realize the spacing of haulage rope, set up corresponding limit structure in the hookup location of driving lever and traction wheel generally to the rotation angle of restriction traction wheel, but because the structure of driving lever and traction wheel itself is comparatively complicated, additionally set up limit structure and will improve the preparation degree of difficulty, lead to production efficiency to reduce.

Disclosure of Invention

The utility model aims to provide a traction rope limiting mechanism, an endoscope handle and an endoscope, and solves the technical problems in the prior art.

The utility model is realized in the following way:

in a first aspect, the utility model provides a traction rope limiting mechanism, which comprises a traction rope and a limiting assembly, wherein a pre-tightening component is arranged on the traction rope, the limiting assembly is arranged on a moving path of the pre-tightening component, and the limiting assembly is used for being in stop fit with the pre-tightening component so as to limit the moving range of the traction rope.

In the technical scheme, the pre-tightening structure is limited by the limiting assembly, so that the moving range of the traction rope is limited, and the bending angle of the active bending section is controlled; when the haulage rope moves in the endoscope handle, the pretightening structure member moves along with the haulage rope, and the difficulty of limiting the pretightening structure member is smaller than the difficulty of limiting the haulage rope because the radial dimension of the pretightening structure member is larger than that of the haulage rope; compared with the limit structure arranged on the deflector rod or the traction wheel, the limit assembly is not limited by the deflector rod or the traction wheel in the limit assembly and is in stop fit with the pretightening structure, so that the production and manufacturing difficulty is low.

Further, under the condition that the initiative bending section is connected with two haulage ropes, two spacing components are located the pretightning knot component both sides on any haulage rope, or two spacing components and haulage rope one-to-one setting, and two spacing components are located distal end one side or proximal end one side of pretightning knot component simultaneously, or spacing components have four, and pretightening knot component both sides of any haulage rope all are provided with spacing components.

Further, the spacing assembly includes a guide having a traction channel for the traction rope to pass through, the guide for a stop fit with the pretensioning member.

Further, the limiting assembly further comprises a guide structure, the guide piece is in sliding fit with the guide structure, the guide piece can slide along the guide direction of the guide structure, and the guide direction is parallel to the axial direction of the traction channel.

Further, the guide structure is provided with a first matching structure, the guide piece is provided with a guide base and a second matching structure fixed with the guide base, and the first matching structure is in sliding fit with the second matching structure; the first cooperation structure is provided with spacing portion along direction of guidance, and spacing portion is used for blockking second cooperation structure along direction and the separation of first cooperation structure of perpendicular to direction of guidance, and along direction of guidance, the both ends protrusion guide base setting of second cooperation structure.

Further, the guide piece comprises a guide base and a channel part which are arranged in a split mode, the traction channel is located in the channel part, and the channel part is installed on the guide base.

Further, the channel part is close to the end part of the pre-tightening member and protrudes towards the pre-tightening member relative to the guide base, the channel part is a structural member made of flexible materials, and the guide base is used for being in abutting fit with the pre-tightening member.

Further, along the axial direction of the traction channel, the axial length of the channel part is longer than the length of the guide base, and two ends of the channel part are protruded out of the guide base; and/or the guide base is provided with a mounting groove, the channel part is mounted in the mounting groove, and the end face of the mounting groove in the axial direction of the traction channel is used for being in stop fit with the pre-tightening structure.

In a second aspect, the utility model provides an endoscope handle comprising the hauling cable limiting mechanism.

In a third aspect, the present utility model provides an endoscope comprising the endoscope handle described above.

The beneficial effects of the utility model are as follows:

1. according to the utility model, the pre-tightening structure is limited by arranging the limiting component, and the structure and the installation position of the limiting component are not limited by the deflector rod and the traction wheel relative to the limiting structure arranged on the deflector rod or the traction wheel, so that the design, the production and the assembly of the limiting component are not influenced by the deflector rod and the traction rope, the manufacturing difficulty is reduced, the production efficiency and the assembly efficiency are improved, and the structures of the traction wheel and the deflector rod are simplified and the manufacturing efficiency of the deflector rod and the traction wheel is improved because the limiting structure is not required to be arranged on the traction wheel and the deflector rod;

2. according to the utility model, the sliding fit guide piece and the guide structure are arranged, and the relative positions of the guide piece and the guide structure are adjusted to adjust the moving range of the traction rope along the axial direction of the traction rope, so that the traction rope is adapted to active bending sections with different specifications and different maximum bending angles, and the applicability of the limiting mechanism is improved.

Drawings

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

FIG. 1 is a schematic view of a traction rope limiting mechanism disclosed in a first embodiment of the present utility model;

FIG. 2 is a schematic view of a traction rope limiting mechanism according to a second embodiment of the present utility model;

FIG. 3 is a schematic view of a traction rope limiting mechanism according to a third embodiment of the present utility model;

FIG. 4 is a schematic view of a traction rope limiting mechanism according to a fourth embodiment of the present utility model;

FIG. 5 is a schematic illustration of the structure of a guide disclosed in some embodiments of the utility model;

FIG. 6 is a schematic illustration of the structure of a guide disclosed in some embodiments of the utility model;

FIG. 7 is a schematic illustration of the mating of guides and guides disclosed in some embodiments of the utility model;

fig. 8 is a schematic structural view of a guide member disclosed in a fifth embodiment of the present utility model;

fig. 9 is a schematic structural view of a guide member disclosed in a fifth embodiment of the present utility model;

FIG. 10 is a schematic illustration of the mating of a guide and a guide disclosed in a fifth embodiment of the present utility model;

fig. 11 is a schematic view of a cooperating structure of a stop mechanism and endoscope handle as disclosed in some embodiments of the present utility model.

Reference numerals illustrate:

100-limit component, 110-guide piece, 111-traction channel, 112-guide base, 112 a-mounting groove, 113-second cooperation structure, 114-channel portion, 120-guide structure, 121-first cooperation structure, 121 a-limit portion, 200-traction rope, 300-pretightening member, 400-endoscope handle.

Detailed Description

The following description provides many different embodiments, or examples, for implementing different features of the utility model. The elements and arrangements described in the following specific examples are presented for purposes of brevity and are provided only as examples and are not intended to limit the utility model.

In the embodiments of the present utility model, "proximal" and "distal" refer to the endoscope and its accessories in the use environment, with respect to the user's near-far position, wherein the end closer to the user is designated as "proximal" and the end farther from the user is designated as "distal".

In the related art, the rotation angle of the traction wheel or the stirring angle of the stirring rod is generally limited, so that the movement range of the traction rope is controlled, but the structures of the traction wheel and the stirring rod are complex, so that if a limiting structure is additionally arranged, the structures of the traction wheel and the stirring rod are too complex, the corresponding manufacturing difficulty is improved, the production efficiency is reduced, and the assembly difficulty is also improved due to the fact that the structure is more complex.

In view of this, the present utility model provides a traction rope limiting mechanism, which limits the position of the traction rope 200 by limiting the position of the pre-tightening structure 300 on the traction rope 200, as shown in fig. 1 to 10, to avoid making the structure of the traction wheel or the lever more complicated.

The limiting mechanism of the traction rope 200 provided by some embodiments of the utility model comprises the traction rope 200 and a limiting assembly 100, wherein the traction rope 200 is provided with a pre-tightening member 300, the limiting assembly 100 is arranged on a moving path of the pre-tightening member 300, and the limiting assembly 100 is used for being in stop fit with the pre-tightening member 300 so as to limit the moving range of the traction rope 200, thereby controlling the bending angle of the active bending section.

The limiting assembly 100 is arranged to limit the pretightening structure 300, and compared with the limiting structure arranged on the deflector rod or the traction wheel, the structure and the installation position of the limiting assembly 100 are not limited by the deflector rod and the traction wheel, and the design, the production and the assembly are not influenced by the deflector rod and the traction rope 200, so the production and the manufacture difficulty are lower, and the production and the assembly are more convenient; and because the limiting mechanism is not arranged on the deflector rod and the traction wheel, the structures of the traction wheel and the deflector rod are simplified, the manufacturing difficulty of the traction wheel and the deflector rod is reduced, and the production efficiency is increased.

The pretensioning member 300 is for adjusting the pretensioning force on the traction rope 200; when the traction rope 200 is assembled, the traction rope 200 is generally assembled in a segmented manner for convenience in assembly, and the assembled traction rope is then butted to form a complete whole through the pre-tightening structure 300, so that force transmission is realized, and the pre-tightening structure 300 adjusts the pre-tightening force of the traction rope 200 appropriately for convenience in driving the traction wheel to move the traction rope 200.

The stop assembly 100 is in stop fit with the pretightening structure 300, on one hand, because the radial dimension of the pretightening structure 300 is larger than the radial dimension of the traction rope 200, the pretightening structure 300 is a part protruding on the traction rope 200, so that the stop of the pretightening structure 300 is easier, on the other hand, the pretightening tension is arranged on the traction rope 200, if the traction rope 200 is limited, the tensioning state of the traction rope 200 is influenced, the driving of the traction wheel on the traction rope 200 is influenced, and the difficulty of limiting the traction rope 200 is larger because the thickness of the traction rope 200 is not changed, therefore, in the utility model, the pretightening structure 300 and the stop assembly 100 are used for stop fit to limit the moving range of the traction rope 200.

The cooperation of haulage rope 200 and spacing subassembly 100 has multiple forms, can combine the fig. 1 to 4 to show, haulage rope 200 connects between initiative bend section and traction wheel, and the left end of haulage rope 200 is connected with initiative bend section, and the right-hand member is connected with the traction wheel, and initiative bend section generally has two bending directions, and two haulage ropes 200 are generally connected to initiative bend section, and one haulage rope 200 corresponds the bending direction of control initiative bend section, all is provided with pretightning knot member 300 on every haulage rope 200, and two haulage ropes 200 all are connected on the traction wheel, through the rotation control of traction wheel the removal of two haulage ropes 200.

Referring to fig. 1, each traction rope 200 is correspondingly provided with two limiting assemblies 100, the two limiting assemblies 100 are respectively located at two sides of the pre-tightening structure 300, the pre-tightening structure 300 moves back and forth between the two limiting assemblies 100, and the moving range of the pre-tightening structure 300 between the two limiting assemblies 100 is the moving range of the traction rope 200 where the pre-tightening structure 300 is located, and each traction rope 200 has a corresponding moving range.

As shown in fig. 2, each traction rope 200 is correspondingly provided with a limiting component 100, two limiting components 100 are simultaneously arranged at one side of the proximal end of the pretightening structure 300, and as the two traction ropes 200 are connected to the traction wheel and the active connecting section, when the lower traction rope 200 moves towards the limiting component 100 under the driving of the traction wheel, the upper traction rope 200 moves away from the limiting component 100, when the pretightening structure of the lower part is in abutting fit with the limiting component 100, the lower traction rope 200 realizes limiting, the active bending section bends to the maximum bending angle at the side, the upper traction rope 200 is the same, and when the upper traction rope 200 moves towards the limiting component 100, the pretightening structure 300 is in abutting fit with the limiting component 100 to limit the movement of the traction rope 200, thereby achieving the maximum bending angle of the active bending section at the side.

As shown in fig. 3, each traction rope 200 is correspondingly provided with a limiting component 100, two limiting components 100 are simultaneously arranged at one side of the distal end of the pre-tightening structure 300, when the active bending section needs to bend towards the side of the traction rope 200 below, the traction rope 200 below moves away from the limiting component 100, and meanwhile, the traction rope 200 above moves towards the direction close to the limiting component 100, when the pre-tightening structure 300 above is in stop fit with the limiting component 100, the traction wheel cannot rotate any more, so that the traction rope 200 below stops moving, the active bending section bends towards the lower side to the maximum bending angle, and similarly, when the active bending section needs to bend towards the side of the traction rope 200 above, the movement range of the traction rope 200 above and the bending angle of the active bending section are limited by the stop fit of the pre-tightening structure 300 below and the limiting component 100.

As shown in fig. 4, only one traction rope 200 is provided with two limiting assemblies 100, the two limiting assemblies 100 are respectively located at two sides of the pre-tightening structure 300, when the traction rope 200 above moves towards the proximal direction, namely the right side, the pre-tightening structure 300 is in stop fit with the limiting assemblies 100 on the right side, the bending angle of the active bending section bending towards the side of the traction rope 200 above is limited, when the traction rope 200 above moves towards the distal direction, namely the left side, the pre-tightening structure 300 is in stop fit with the limiting assemblies 100 on the left side, and the traction rope 200 below also stops moving along with the limiting angles of the active bending section bending towards the side of the traction rope 200 below.

The limiting assembly 100 of the present utility model has various structures, in some embodiments, the limiting assembly 100 includes a guide 110, as shown in fig. 5 and 8, the guide 110 is installed inside an endoscope handle 400, and a traction channel 111 for passing a traction rope 200 is further provided in the guide 110, an axial direction of the traction channel 111 is the same as an extending direction of the traction rope 200, and the guide 110 is used for being in stop fit with the pretightening member 300; on the one hand, the guide member 110 can be used for the traction rope 200 to pass through, so as to limit the moving path of the traction rope 200 and also protect the traction rope 200, so that other components in the endoscope handle 400 act on the traction rope 200 to cause the position of the traction rope 200 to change; on the other hand, the traction channel 111 on the guide 110 is smaller, and generally is attached to the surface of the traction rope 200, so that the pre-tightening member 300 cannot pass through, and when the pre-tightening member 300 contacts with the guide 110, the pre-tightening member 300 cannot move toward the direction of the guide 110, and the guide 110 performs a limiting function on the pre-tightening member 300.

However, for the active bending section with different specifications, the maximum bending angle is different, so the movement range of the traction rope 200 is also different, the connection between the guide 110 and the endoscope is set to be a movable connection for improving the universality of the limit assembly 100, the position of the guide 110 in the endoscope handle 400 is adjustable, and therefore, the position of the guide 110 can be adjusted according to the bending angle of the active bending section.

In order to realize the movable connection between the guide member 110 and the endoscope handle 400, the limiting assembly 100 further comprises a guide structure 120, the guide structure 120 is fixed to the endoscope handle 400, the guide member 110 is in sliding fit with the guide structure 120, and the guide member 110 can slide along the guiding direction of the guide structure 120, wherein the guiding direction of the guide structure 120 is parallel to the axial direction of the traction channel 111.

The guide 110 slides on the guide structure 120 to adjust the position of the guide 110 in the endoscope handle 400, and when the position of the guide 110 is adjusted, the guide 110 and the guide structure 120 can be fixed so that the guide 110 is in stop fit with the pre-tightening member 300; the movement range of the traction rope 200 is adjusted by adjusting the position of the guide 110 to match the maximum bending angle of the active bending section; the guide 110 and the guide structure 120 may be fixed by adhesive or by plugging.

The guide structure 120 has a first mating structure 121, the guide 110 has a guide base 112 and a second mating structure 113 fixed to the guide base 112, the first mating structure 121 and the second mating structure 113 are slidably mated to realize sliding mating of the guide structure 120 and the guide 110, the first mating structure 121 may be any one of a chute structure and a slider structure, the second mating structure 113 may be the other one of a chute structure and a slider structure, and the slider structure may be replaced with a pulley structure, so long as the first mating structure 121 and the second mating structure 113 can realize sliding, no specific structural limitation is made herein, and when the first mating structure 121 and the second mating structure 113 slide, a sliding gap is provided between them; the guide structure 120 is generally integrally provided with the housing of the endoscope handle 400, and the guide structure 120 is formed simultaneously when the housing of the handle is manufactured, and the handle specifications of endoscopes with different maximum bending angles can be consistent, so that the maximum bending angle of the active bending section can be adapted by adjusting the position of the guide piece 110 on the guide structure 120.

When the guide 110 limits the pre-fastening member 300, the pre-fastening member 300 abuts against the end of the guide 110, and the end of the guide 110 abutting against the pre-fastening member 300 tends to move away from the guide structure 120 under the action of the pre-fastening member 300, in order to avoid the detachment between the guide 110 and the guide structure 120, the first mating structure 121 is provided with a limiting portion 121a, and the limiting portion 121a is disposed along the guiding direction, so that no matter which position of the first mating structure 121 the second mating structure 113 slides to, the limiting portion 121a can block the second mating structure 113 from being separated from the first mating structure 121 along the direction perpendicular to the guiding direction, and although the relative positions of the first mating structure 121 and the second mating structure 113 are fixed by means of glue or the like later, the positioning of the limiting portion 121a can further avoid the situation that the first mating structure 121 and the second mating structure 113 are separated.

In addition, in the use of the endoscope, the control accuracy of the pull-cord 200 is required to be high, so that the stability of the connection between the guide 110 and the guide structure 120 needs to be maintained as much as possible, in some embodiments of the present utility model, two ends of the second mating structure 113 are protruded from the guide base 112 along the guiding direction, when the pre-tightening member 300 abuts against the guide 110, even if the fixing connection stability between the guide 110 and the guide structure 120 is reduced, the guide 110 has a tendency to separate from the guide structure 120, but the guide 110 will be primarily blocked by the limiting portion 121a during the separation, and the second mating structure 113 protruding from the guide base 112 is firstly stopped and limited by the limiting portion 121a, so that the variation of the guide base 112 is as small as possible, thereby avoiding the situation that the position of the pull-cord 200 passing through the guide 110 is changed.

When the first matching structure 121 is a sliding groove structure and the second matching structure 113 is a sliding block structure, as shown in fig. 5 to 7, the limiting portion 121a is a protrusion disposed on an inner sidewall of the sliding groove structure, and the sliding block cannot be separated from the sliding groove; when the first engaging structure 121 is a slider and the second engaging structure 113 is a chute structure, as shown in fig. 8 to 10, the limiting portion 121a is a protrusion disposed on the slider structure.

The guide 110 further comprises a channel portion 114, the channel portion 114 and the guide base 112 are arranged in a split mode, the traction channel 111 is located at the channel portion 114, the channel portion 114 is installed on the guide base 112, the channel portion 114 is mainly used for being matched with the traction rope 200, the channel portion 114 and the second matching structure 113 are located at two sides of the guide base 112 respectively, the split guide base 112 and the channel portion 114 can facilitate assembly of the traction rope 200, when the traction rope 200 is assembled, the channel portion 114 can be directly sleeved outside the traction rope 200, influences of the guide 110 on assembly of the traction rope 200 are reduced, and convenience in assembly of the traction rope 200 is improved.

The channel 114 is generally in a tubular structure, the channel 114 is near the end of the pre-tightening member 300 and protrudes towards the pre-tightening member 300 relative to the guide base 112, the channel 114 is a structural member made of flexible material and can be deformed under the action of external force, and the guide base 112 is used for being in stop fit with the pre-tightening member 300; when the pre-tightening member 300 moves towards the guide base 112, the pre-tightening member 300 is firstly abutted against the channel portion 114 protruding from the guide base 112, and the channel portion 114 is of a flexible structure, so that the channel portion 114 is deformed, and in the deformation process of the channel portion 114, the acting force of the pre-tightening member 300 on the guide 110 is gradually reduced until the pre-tightening member 300 abuts against the guide base 112, so that the channel portion 114 plays a role in buffering, the structural integrity of the guide base 112 is maintained, and the situation that a large impact force is generated and the guide base 112 is damaged when the pre-tightening member 300 directly abuts against the guide base 112 is avoided.

The channel part 114 can be a structural member made of flexible materials or a structural member made of hard materials, the channel part 114 body can be in stop fit with the pretightening structure 300, the axial length of the channel part 114 is longer than the length of the guide base 112 along the axial direction of the traction channel 111, the two ends of the channel part 114 are protruded out of the guide base 112, the channel part 114 is very long and mainly used for supporting and limiting the traction rope 200, the position of the traction rope 200 is further limited, the bending control precision of the traction rope 200 to the active bending section is ensured, generally, the protruded length of one side of the channel part 114 close to the pretightening structure 300 is shorter, bending of the channel part 114 under the action of the pretightening structure 300 is avoided, and the protruded length of one side of the channel part 114 far away from the pretightening structure 300 is longer, and the radial movement range of the traction rope 200 is limited as much as possible.

The channel portion 114 may be directly installed on the guide base 112, or an installation groove 112a may be provided on the guide base 112, where the channel portion 114 is installed in the installation groove 112a, and an end portion of the installation groove 112a in the axial direction of the traction channel 111 is used for stopping and matching with the pre-tightening member 300, and even if the channel portion 114 is separated from the guide base 112, the channel portion 114 cannot limit the pre-tightening member 300, but an end portion of the installation groove 112a may limit the pre-tightening member 300, so as to avoid an excessive bending angle of the active bending section.

Some embodiments of the present utility model further provide an endoscope handle 400, which includes the limiting structure of the pull rope 200 provided in any of the foregoing embodiments, and may be combined with the structure shown in fig. 11, where the pull rope 200 is wound on a pull wheel, and the movement of the pull rope 200 is controlled by the rotation of the pull wheel.

Some embodiments of the present utility model further provide an endoscope, including the endoscope handle 400 provided in any of the foregoing embodiments, where the endoscope in the embodiments of the present utility model may be a bronchoscope, a pyeloscope, a esophagoscope, a gastroscope, a enteroscope, an otoscope, a nasoscope, a stomatoscope, a laryngoscope, a colposcope, a laparoscope, an arthroscope, and the like, and the embodiments of the present utility model do not specifically limit the types of the endoscope.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (10)

1. A traction rope limiting mechanism, comprising:

a traction rope (200), wherein a pre-tightening member (300) is arranged on the traction rope (200);

the limiting assembly (100) is arranged on the moving path of the pre-tightening structure (300), and the limiting assembly (100) is used for being in stop fit with the pre-tightening structure (300) so as to limit the moving range of the traction rope (200).

2. A traction rope limiting mechanism as defined in claim 1, wherein,

under the condition that two haulage ropes (200) are connected to the initiative bending section, spacing subassembly (100) have two, two spacing subassembly (100) are located arbitrary pretension knot component (300) both sides on haulage rope (200), or, spacing subassembly (100) have two, two spacing subassembly (100) with haulage rope (200) one-to-one sets up, and two spacing subassembly (100) are located simultaneously distal end one side or proximal end one side of pretension knot component (300), or, spacing subassembly (100) have four, arbitrary pretension knot component (300) both sides of haulage rope (200) all are provided with spacing subassembly (100).

3. A traction rope limiting mechanism as defined in claim 1, wherein,

the spacing assembly (100) comprises a guide (110), the guide (110) is provided with a traction channel (111) for a traction rope (200) to pass through, and the guide (110) is used for being in stop fit with the pre-tightening structure (300).

4. A traction rope limiting means as claimed in claim 3, wherein,

the limiting assembly (100) further comprises a guide structure (120), the guide piece (110) is in sliding fit with the guide structure (120), the guide piece (110) can slide along the guide direction of the guide structure (120), and the guide direction is parallel to the axial direction of the traction channel (111).

5. A traction rope limiting mechanism as defined in claim 4, wherein,

the guide structure (120) is provided with a first matching structure (121), the guide piece (110) is provided with a guide base (112) and a second matching structure (113) fixed with the guide base (112), and the first matching structure (121) is in sliding fit with the second matching structure (113);

the first matching structure (121) is provided with a limiting part (121 a) along the guiding direction, the limiting part (121 a) is used for blocking the second matching structure (113) from being separated from the first matching structure (121) along the direction perpendicular to the guiding direction, and two ends of the second matching structure (113) protrude out of the guiding base (112) along the guiding direction.

6. A traction rope limiting means as claimed in claim 3, wherein,

the guide member (110) comprises a guide base (112) and a channel part (114) which are arranged in a split mode, the traction channel (111) is positioned on the channel part (114), and the channel part (114) is arranged on the guide base (112).

7. A traction rope limiting mechanism as defined in claim 6, wherein,

the channel part (114) is close to the end part of the pre-tightening structure (300), protrudes towards the pre-tightening structure (300) relative to the guide base (112), the channel part (114) is a structural part made of flexible materials, and the guide base (112) is used for being in stop fit with the pre-tightening structure (300).

8. A traction rope limiting mechanism as defined in claim 6, wherein,

along the axial direction of the traction channel (111), the axial length of the channel part (114) is longer than the length of the guide base (112), and two ends of the channel part (114) are arranged to protrude out of the guide base (112);

and/or the guide base (112) is provided with a mounting groove (112 a), the channel part (114) is mounted in the mounting groove (112 a), and the mounting groove (112 a) is positioned on the end surface of the traction channel (111) in the axial direction and is used for being in stop fit with the pre-tightening structure (300).

9. An endoscope handle comprising the pull-cord limiting mechanism of claim 8.

10. An endoscope comprising the endoscope handle (400) of claim 9.