CN117243548A

CN117243548A - Endoscope and haulage rope tensioning adjustment mechanism

Info

Publication number: CN117243548A
Application number: CN202311461407.XA
Authority: CN
Inventors: 王飞
Original assignee: Shenzhen Xingchenhai Medical Technology Co ltd
Current assignee: Shenzhen Xingchenhai Medical Technology Co ltd
Priority date: 2023-11-01
Filing date: 2023-11-01
Publication date: 2023-12-19

Abstract

The invention relates to an endoscope, in particular to a traction rope tensioning and adjusting mechanism of the endoscope. A pull-cord tensioning adjustment mechanism for an endoscope, comprising: the driving wheel is used for winding the traction rope and changing the winding quantity of the traction rope when rotating around the axis of the driving wheel so as to tension and loosen the traction rope; the first thread adjusting piece is provided with a traction rope connecting structure which is movably arranged on the driving wheel along the axial direction of the first thread adjusting piece so as to adjust the tension of the traction rope; the second threaded adjusting piece is in threaded transmission connection with the first threaded adjusting piece and is rotatably arranged on the driving wheel, and the second threaded adjusting piece can drive the first threaded adjusting piece to axially move along the second threaded adjusting piece when rotating; the driving wheel is provided with a blocking structure for supporting the second threaded adjusting member along the moving direction of the first threaded adjusting member so as to maintain the tension of the traction rope. The invention mainly solves the technical problem that the traditional endoscope is difficult to accurately adjust the tensioning state of the traction rope.

Description

Endoscope and haulage rope tensioning adjustment mechanism

Technical Field

The invention relates to an endoscope, in particular to a traction rope tensioning and adjusting mechanism of the endoscope.

Background

With rapid advances in technology and medical technology, the use of endoscopes for minimally invasive or non-invasive medical examinations and/or treatments has become widespread. Especially a medical soft endoscope, which can enter the body through the natural duct of the human body in the examination or treatment process, and has almost no damage to the patient. The doctor can eliminate the observation blind area by utilizing the characteristic that the front end part of the soft endoscope can be bent, and can perform omnibearing examination on pathological tissues.

The medical flexible endoscope generally realizes the bending of the bendable section by pulling and releasing the traction rope, so that the tightness degree of the traction rope can be directly related to the accuracy of the bending angle of the front end of the endoscope.

The pull rope in the endoscope generally adopts a steel wire rope, and the traditional endoscope is provided with an aluminum sleeve in a crimping way, and the aluminum sleeve is clamped with a driving wheel in the endoscope to transmit the pulling acting force. However, the conventional aluminum sleeve crimping method is difficult to ensure accurate aluminum sleeve crimping positions and is difficult to operate, and once crimping is completed, tightness degree of the traction rope cannot be adjusted, so that bending angle of the endoscope cannot meet requirements. If the aluminum sleeve is dismounted and crimped again, the traction rope is easily damaged when the aluminum sleeve is dismounted, and the reliability of the product is reduced.

Disclosure of Invention

The invention mainly solves the technical problem that the traditional endoscope is difficult to accurately adjust the tensioning state of the traction rope.

In a first aspect, the present invention provides a traction rope tensioning adjustment mechanism.

A pull-cord tensioning adjustment mechanism for an endoscope, comprising:

the driving wheel is used for winding the traction rope and changing the winding quantity of the traction rope when rotating around the axis of the driving wheel so as to tension and loosen the traction rope;

the first thread adjusting piece is provided with a traction rope connecting structure for pulling the traction rope; the first thread adjusting piece is movably arranged on the driving wheel along the axial direction of the first thread adjusting piece so as to adjust the tension of the traction rope when moving;

the second threaded adjusting piece is in threaded transmission connection with the first threaded adjusting piece, the second threaded adjusting piece is rotatably arranged on the driving wheel, and the second threaded adjusting piece can drive the first threaded adjusting piece to axially move along the second threaded adjusting piece when rotating; the driving wheel is provided with a blocking structure which is used for supporting the second threaded adjusting piece along the moving direction of the first threaded adjusting piece, so that the tensioning of the traction rope is maintained.

In one technical scheme, the driving wheel is provided with a guide structure, and the guide structure is used for enabling the first threaded adjusting piece to move along the axial direction of the first threaded adjusting piece.

In one technical scheme, a guide groove is formed in the end face of the driving wheel, the guide structure is formed by the guide groove, and at least a part of the first thread adjusting member in the radial direction is embedded in the guide groove.

In one technical scheme, the driving wheel is provided with two guide grooves on at least one side end face, one first thread adjusting piece is respectively assembled in the two guide grooves, and the two guide grooves are symmetrically arranged relative to the axis of the driving wheel.

In one technical scheme, the end face of the driving wheel is provided with an adjusting piece clamping groove, at least one part of the second threaded adjusting piece is embedded into the adjusting piece clamping groove, and the blocking structure is formed by the groove side wall of the adjusting piece clamping groove.

In one technical scheme, be equipped with the external screw thread on the first screw thread regulating part, be equipped with the screw hole on the second screw thread regulating part, first screw thread regulating part assembly is in the screw hole on the second screw thread regulating part forms screw thread transmission connection.

In one technical scheme, be equipped with haulage rope connecting hole on the first screw thread regulating part, at least a portion of haulage rope penetrate in the haulage rope connecting hole and with first screw thread regulating part fixed connection.

In one technical scheme, be equipped with the wire winding groove on the outer peripheral face of drive wheel, be equipped with on the drive wheel and dodge the mouth, dodge the mouth along the axial of first screw thread regulating part link up the groove lateral wall of wire winding groove one side at least, dodge the mouth and be in the groove lateral wall department of wire winding groove forms the wire passage that supplies haulage rope switching-over.

In one technical scheme, a guide groove is formed in the end face of the driving wheel, and the guide structure is formed by the guide groove; the avoidance port is an avoidance groove which is in butt joint with the guide groove and is parallel to the guide groove.

In a second aspect, the present invention provides an endoscope.

An endoscope, comprising:

the distal end of the insertion tube assembly is provided with a bendable section, the bendable section is connected with a traction rope, and the bendable section can realize bending state adjustment when the traction rope is tensioned and loosened;

and the handle assembly is internally provided with a traction rope tensioning and adjusting mechanism, the traction rope tensioning and adjusting mechanism is any one of the traction rope tensioning and adjusting mechanism in the technical scheme, a driving wheel in the traction rope tensioning and adjusting mechanism is rotationally assembled on a shell of the handle assembly, and the traction rope is connected to a first threaded adjusting piece of the traction rope tensioning and adjusting mechanism.

The invention has the beneficial effects that:

according to the traction rope tensioning adjustment mechanism, the first threaded adjustment piece and the second threaded adjustment piece connected with the first threaded adjustment piece in a threaded transmission mode are arranged on the driving wheel, the second threaded adjustment piece can rotate into stepless axial movement of the first threaded adjustment piece by means of threads when rotating, and then the traction rope on the first threaded adjustment piece is pulled to accurately adjust the tensioning force of the traction rope.

Drawings

FIG. 1 is a schematic view of an embodiment of an endoscope of the present invention;

FIG. 2 is a schematic view of the insertion tube assembly of FIG. 1;

FIG. 3 is a schematic view of the internal structure of the handle assembly of FIG. 1;

FIG. 4 is a schematic view of a portion of the drive wheel of FIG. 3;

FIG. 5 is a schematic diagram showing a part of the driving wheel in FIG. 3;

FIG. 6 is a schematic view of the structure of the drive wheel itself;

fig. 7 is a schematic view of the assembled structure of the drive wheel on the handle housing.

List of feature names corresponding to reference numerals in the figure:

100. an insertion tube assembly; 101. a tube body; 102. a bendable section; 103. a tip section;

200. a handle assembly;

201. a handle housing;

202. rotating the operating member; 221. a drive shaft; 222. a handle;

203. a driving wheel; 231. a guide structure; 232. an adjusting piece clamping groove; 233. an avoidance port;

204. a first thread adjuster; 241. a traction rope connecting hole;

205. a second threaded adjustment member;

206. a bearing;

207. a fixing screw;

300. a handle connecting wire;

400. a traction rope.

Detailed Description

The invention will be described in further detail below with reference to the drawings by means of specific embodiments. Wherein like elements in different embodiments are numbered alike in association. In the following embodiments, numerous specific details are set forth in order to provide a better understanding of the present application. However, one skilled in the art will readily recognize that some of the features may be omitted, or replaced by other elements, materials, or methods in different situations. In some instances, some operations associated with the present application have not been shown or described in the specification to avoid obscuring the core portions of the present application, and may not be necessary for a person skilled in the art to describe in detail the relevant operations based on the description herein and the general knowledge of one skilled in the art.

Furthermore, the described features, operations, or characteristics of the description may be combined in any suitable manner in various embodiments. Also, various steps or acts in the method descriptions may be interchanged or modified in a manner apparent to those of ordinary skill in the art. Thus, the various orders in the description and drawings are for clarity of description of only certain embodiments, and are not meant to be required orders unless otherwise indicated.

The numbering of the components itself, e.g. "first", "second", etc., is used herein merely to distinguish between the described objects and does not have any sequential or technical meaning. The terms "coupled" and "connected," as used herein, are intended to encompass both direct and indirect coupling (coupling), unless otherwise indicated.

"proximal" and "distal" are the common designations in the medical arts, and for medical instruments such as endoscopes, the proximal end is the end proximal to the instrument operator, and the distal end is the end distal to the instrument operator.

In the embodiment of the invention, the first threaded adjusting piece and the second threaded adjusting piece on the driving wheel are in threaded transmission connection, and the rotation motion of the second threaded adjusting piece can be converted into the axial movement of the first threaded adjusting piece when the second threaded adjusting piece is rotated, so that the traction rope can be driven to be tensioned through the traction rope connecting structure on the first threaded adjusting piece, the stepless adjustment of the tensioning force of the traction rope is realized, and the tensioning state of the traction rope can be conveniently and accurately determined.

Embodiments of the endoscope of the present invention:

referring to fig. 1 and 2, in one embodiment, an endoscope includes an insertion tube assembly 100, a handle assembly 200, and a handle connection line 300.

In one embodiment, referring to fig. 2, insertion tube assembly 100 includes a tube body 101, a bendable section 102, and a tip section 103 arranged in sequence from a proximal end to a distal end. The length of the tube body 101 is generally much greater than the bendable section 102 and the tip section 103 for enabling the insertion tube assembly 100 to reach a target location. The bendable section 102 is provided with a hauling rope channel therein for the hauling rope 400 to pass through and be connected with the distal end of the bendable section 102, and the bendable section 102 can realize bending state adjustment when the hauling rope 400 is pulled and loosened. The bendable sections 102 may be formed using existing bending structures, such as serpentine bones that are hinged one to the other or unit sections that are flexibly connected to each other, the specific structure of which is not described in detail herein. The front end section 103 can be provided with an imaging module and an illumination module, the imaging module and the illumination module can provide illumination for the endoscope and acquire real-time images, the images can be transmitted to the inside of the handle assembly 200 through signal wires, and the images are transmitted to a matched endoscope host for image processing through a handle connecting wire 300 led out of the handle assembly 200 after being processed, so that the real-time images are displayed.

It should be noted that the bendable section 102 of the endoscope may be capable of bending in only one direction, may be capable of bending in two opposite directions, and may be capable of bending in two opposite directions, i.e., four different directions, and the present invention is not limited to a specific bending form, and the tension adjustment scheme of the present invention may be adopted as long as bending adjustment can be performed by the traction rope 400.

Depending on the functional design and the application requirements, the handle attachment line 300 may be routed from a different location of the handle assembly 200, such as from the distal peripheral surface of the handle assembly 200, as shown in FIG. 1, and in some other embodiments, such as from the proximal end of the handle assembly 200, without limitation.

The present invention is directed generally to improvements in the handle assembly 200 and, more particularly, to a pull-cord tensioning adjustment mechanism in the handle assembly 200. Referring to fig. 2 to 5, the handle assembly 200 includes a handle housing 201, a pull-cord tension adjustment mechanism, and a rotational operation member 202. A traction rope tension adjusting mechanism is arranged within the handle housing 201, in one specific embodiment, please refer to fig. 4, the traction rope tension adjusting mechanism comprising a driving wheel 203, a first threaded adjusting member 204 and a second threaded adjusting member 205. The traction rope tension adjusting mechanism will be described in detail below.

In one embodiment, the driving wheel 203 is circular, having an outer circumferential surface around which the traction rope 400 is wound, and the driving wheel 203 is configured to change the winding amount of the traction rope 400 to tighten and loosen the traction rope 400 when rotating around its own axis; it should be noted that, for one traction rope 400, when the driving wheel 203 rotates in the first direction of winding the traction rope 400, the winding amount of the traction rope 400 on the driving wheel 203 increases, the length of the part of the traction rope 400 located outside the driving wheel 203 decreases, and the corresponding side of the bendable section 102 can be pulled, so as to realize the corresponding bending adjustment effect; when the traction rope 400 rotates towards the unreeling second direction, the winding amount of the traction rope 400 on the driving wheel 203 is reduced, the length of the part of the traction rope 400, which is positioned outside the driving wheel 203, is increased, and the corresponding side of the bendable section 102 can be released, so that the corresponding bending adjusting effect is realized. When the two traction ropes 400 are wound around the driving wheel 203 in different winding directions, the traction and release states of the two traction ropes 400 are opposite when the driving wheel 203 is rotated. In one embodiment, the outer circumference of the driving wheel 203 may be provided with a winding groove, which can limit the traction rope 400, so as to prevent the traction rope 400 from slipping off the outer circumference of the driving wheel 203.

In one embodiment, the rotation of the driving wheel 203 is achieved by a rotation operation member 202, and the rotation operation member 202 may be an operation lever, referring to fig. 7, which includes a driving shaft 221 and a handle 222, wherein the driving shaft 221 extends into the inside of the handle housing 201 and is fixedly connected with the driving wheel 203 by a fixing screw 207; the handle 222 is exposed to the outside of the handle housing 201 and can be manipulated by a user to effect rotation of the drive shaft 221. In order to better achieve the transmission of the driving force, a planar engagement structure may be provided between the driving shaft 221 and the driving wheel 203, for example, the driving shaft 221 is configured as a square shaft or a hexagonal shaft, and the driving wheel 203 is configured with a corresponding square hole or hexagonal hole. Of course, other torque transmitting arrangements are possible.

In order to ensure smooth operation of the rotation operation member 202 and reduce the operation force, a bearing 206 is provided between the driving wheel 203 and the handle housing 201, ensuring smooth rotation of the driving wheel 203 without deflection.

The first thread adjusting member 204 is provided with a traction rope connecting structure for pulling the traction rope 400; the first screw adjusting member 204 is movably provided on the driving wheel 203 in its own axial direction to adjust the tension of the traction rope 400 when it is moved. In one embodiment, the first thread adjusting member 204 is provided with an external thread, specifically may take the form of a hollow stud, the center of which forms a haulage rope connection hole 241, and at least a portion of the haulage rope 400 penetrates into the haulage rope connection hole 241 and is fixedly connected with the first thread adjusting member 204. The traction rope 400 and the first thread adjusting member 204 may be fixed by bonding, welding, crimping, etc. Of course, in some other embodiments, the traction rope connecting structure may be other forms, such as a groove on the outer peripheral surface of the first threaded adjusting member 204, and the traction rope 400 is inserted into the groove; for another example, since the traction rope 400 is generally a wire rope, the traction rope 400 and the first screw adjusting member 204 may be fixed by a structure of end-face butt welding. In addition, the traction rope connection structure may be used only for pulling the traction rope 400 and is not fixed to the first screw adjusting member 204, for example, after the traction rope 400 passes through the traction rope connection hole 241 on the first screw adjusting member 204, an expanding structure is provided at the passing-out end of the traction rope 400, such as melting into a spherical end, or sleeving a fixing sleeve, or knotting a steel wire rope, etc., and the expanding structure forms a block with the orifice end surface of the traction rope connection hole 241, so that the first screw adjusting member 204 can achieve pulling of the traction rope 400.

In one embodiment, the driving wheel 203 is provided with a guiding structure 231, and the guiding structure 231 is used for enabling the first screw adjusting member 204 to move along the axial direction of the first screw adjusting member 204. The guiding structure 231 can better maintain the posture of the first thread adjusting member 204, which is convenient for the assembly of the first thread adjusting member 204, and is also beneficial to maintaining the tension of the traction rope 400 constant. In one embodiment, the end surface of the driving wheel 203 is provided with a guiding groove, and the guiding structure 231 is formed by the guiding groove, and at least a part of the radial direction of the first thread adjusting member 204 is embedded in the guiding groove. In some other embodiments, the guiding structure 231 may be a guiding hole provided in the driving wheel 203, and in addition, the guiding structure 231 may be omitted, and the second screw thread adjusting member 205 is in screw thread engagement with the first screw thread adjusting member 204, and can also define the moving direction of the first screw thread adjusting member 204.

The second screw thread adjusting member 205 is in screw thread transmission connection with the first screw thread adjusting member 204, the second screw thread adjusting member 205 is rotatably arranged on the driving wheel 203, and the second screw thread adjusting member 205 can drive the first screw thread adjusting member 204 to axially move along the self-body when rotating. In one embodiment, the second threaded adjustment member 205 is a nut having a threaded bore therein and the first threaded adjustment member 204 is assembled within the threaded bore in the second threaded adjustment member 205 to form a threaded drive connection. The second threaded adjuster 205 may be a hexagonal nut, a round nut, or a threaded sleeve. The threaded hole on the second threaded adjustment member 205 may be in the form of a through hole, which is simple to manufacture and low in cost.

It should be noted that, in other embodiments, the first threaded adjusting member may be provided with an internal thread, that is, a threaded hole, and the second threaded adjusting member may be provided with a stud having an external thread on one axial side, where the first threaded adjusting member may be sleeved on the second threaded adjusting member.

In order to enable the first screw adjusting member 204 and the second screw adjusting member 205 to form traction force on the traction rope 400, the driving wheel 203 is provided with a blocking structure for supporting the second screw adjusting member 205 in the moving direction of the first screw adjusting member 204, thereby maintaining the tension of the traction rope 400. In one embodiment, the end surface of the driving wheel 203 is provided with an adjusting member clamping groove 232, at least a part of the second threaded adjusting member 205 is embedded in the adjusting member clamping groove 232, and the blocking structure is formed by the groove side wall of the adjusting member clamping groove 232. Since the traction rope 400 can be tensioned when pulled, the width of the adjuster catch 232 can be greater than the axial dimension of the second threaded adjuster 205, relying only on a single side of the groove sidewall to form a stop for the second threaded adjuster 205. The adjustment element clamping groove 232 simultaneously effects a rotational assembly of the second threaded adjustment element 205 on the drive wheel 203. In some other embodiments, other forms of structure may be provided to achieve the rotational assembly of the second screw adjuster 205, for example, a hollow shaft is provided along the axis of the second screw adjuster 205, an internal thread is provided in the inner bore of the hollow shaft for mating with an external thread on the first screw adjuster 204, and the outer peripheral surface of the hollow shaft is rotationally assembled on the rotationally mounted seat.

In order to ensure stable support of the second threaded adjuster 205, the handle housing 201 may include a first housing and a second housing that are combined, and the first housing and the second housing are both provided with half of the adjuster clamping grooves 232, so that the integrated clamping grooves enclosed after the combination can at least stably support two opposite sides of the second threaded adjuster 205.

Of course, in some other embodiments, the blocking structure may be other forms, for example, a limit protrusion protruding from an end surface of the driving wheel 203, and the limit protrusion may be provided at only one side end surface of the second screw adjuster 205.

The adjusting member clamping groove 232 is formed in the middle of the length direction of the guide groove, so that the guide groove can guide the two axial ends of the first threaded adjusting member 204 at the same time, and the reliable action of the first threaded adjusting member 204 is better ensured. Likewise, the handle housing 201 may include a first housing and a second housing that are combined, where the first housing and the second housing are both provided with half guide grooves, and the combined guide grooves can guide the first screw adjusting member 204 more smoothly.

For an endoscope provided with two traction ropes 400, in one embodiment, two guide grooves are provided on at least one side end surface of the driving wheel 203, each of the two guide grooves is provided with a first screw adjusting member 204, the two guide grooves are symmetrically arranged with respect to the axis of the driving wheel 203, and the distance between one end of the two guide grooves is smaller than the distance between the other end of the two guide grooves. Due to the larger radial dimension of the second threaded adjusting member 205, the above arrangement form can better adapt to the arrangement space requirement of the second threaded adjusting member 205, and the symmetrical structure facilitates that the two traction ropes 400 have symmetrical tightness changes when the driving wheel 203 rotates in different directions.

In order to facilitate connection of the traction rope 400 wound on the driving wheel 203 and the second threaded adjusting member 205, the driving wheel 203 is provided with an avoidance opening 233, the avoidance opening 233 penetrates through the groove side wall of at least one side of the winding groove along the axial direction of the first threaded adjusting member 204, and the avoidance opening 233 forms a wire passing channel for reversing the traction rope 400 at the groove side wall of the winding groove. Note that, the escape port 233 may be an escape groove or an escape hole. Referring to fig. 6, in one embodiment, the avoidance opening 233 is an avoidance groove, the avoidance groove is parallel to the guide groove, two ends are of a through structure, one end is abutted with the guide groove on the end surface of the driving wheel 203, and the other end penetrates through the end surface of the driving wheel 203.

In the manufacture of the endoscope, one end of each haulage cable 400 is connected to the bendable section 102 and the other end is connected to the corresponding first screw adjusting member 204, and then the first screw adjusting member 204 and the second screw adjusting member 205 are assembled to the driving wheel 203 in a screw-driving connection. When the tightness degree of the traction rope 400 needs to be adjusted, the second threaded adjusting member 205 can be rotated, and the rotation of the second threaded adjusting member 205 is converted into the axial linear motion of the first threaded adjusting member 204 by utilizing the matching relationship between the second threaded adjusting member 205 and the first threaded adjusting member 204, and the first threaded adjusting member 204 can move along the axial direction under the constraint of the guide groove. The adjusting process can be realized by only rotating the second threaded adjusting piece 205, the tightness degree of the endoscope hauling rope 400 can be quickly and conveniently adjusted from the end face of the driving wheel 203, the production efficiency and the product reliability are improved, the first threaded adjusting piece 204 connected with the hauling rope 400 does not need to be rotated during the adjusting process, and the stranding and unwinding of the hauling rope 400 can be avoided (because the hauling rope 400 is a steel wire rope which is formed by twisting a plurality of steel wires together); meanwhile, due to the adoption of thread adjustment, stepless tightness adjustment of the endoscope hauling rope 400 can be realized, and bending precision of the front end of the endoscope can be improved. In addition, the thread structures on the first thread adjusting member 204 and the second thread adjusting member 205 are independent of the driving wheel 203, and can be manufactured by adopting a mature machining process, so that more complex structures on the driving wheel 203 can be avoided, and the cost is also reduced.

Embodiments of a traction rope tensioning adjustment mechanism in the present invention:

the structure of the traction rope tensioning and adjusting mechanism is the same as that of any embodiment of the endoscope, and is not repeated here.

The foregoing description of the invention has been presented for purposes of illustration and description, and is not intended to be limiting. Several simple deductions, modifications or substitutions may also be made by a person skilled in the art to which the invention pertains, based on the idea of the invention.

Claims

1. Haulage rope tensioning adjustment mechanism for endoscope, its characterized in that includes:

2. The traction rope tensioning adjustment mechanism of claim 1, wherein the drive wheel is provided with a guide structure for moving the first threaded adjustment member in the axial direction of the first threaded adjustment member itself.

3. The traction rope tensioning adjustment mechanism of claim 2, wherein a guide groove is provided on an end face of the drive wheel, the guide structure being formed by the guide groove, at least a portion of the first thread adjustment member being radially embedded in the guide groove.

4. A traction rope tensioning adjustment mechanism as defined in claim 3, wherein at least one side end face of the driving wheel is provided with two guide grooves, each of which is provided with one of the first screw-threaded adjustment members, and the guide grooves are symmetrically arranged with respect to the axis of the driving wheel.

5. The traction rope tensioning adjustment mechanism according to any one of claims 1 to 4, wherein an adjustment member clamping groove is provided on an end face of the drive wheel, at least a portion of the second threaded adjustment member is embedded in the adjustment member clamping groove, and the blocking structure is formed by a groove side wall of the adjustment member clamping groove.

6. The traction rope tensioning adjustment mechanism according to any one of claims 1 to 4, wherein the first threaded adjustment member is provided with an external thread and the second threaded adjustment member is provided with a threaded bore, the first threaded adjustment member fitting within the threaded bore of the second threaded adjustment member to form a threaded drive connection.

7. The traction rope tensioning adjustment mechanism according to any one of claims 1 to 4, wherein the first threaded adjustment member is provided with a traction rope connection aperture, and at least a portion of the traction rope penetrates into the traction rope connection aperture and is fixedly connected with the first threaded adjustment member.

8. The traction rope tensioning adjustment mechanism according to any one of claims 1 to 4, wherein a winding groove is formed in the outer peripheral surface of the driving wheel, an avoidance opening is formed in the driving wheel, the avoidance opening penetrates through a groove side wall of at least one side of the winding groove along the axial direction of the first threaded adjustment member, and a wire passing channel for reversing the traction rope is formed at the groove side wall of the winding groove.

9. The traction rope tensioning adjustment mechanism of claim 8, wherein a guide groove is provided on an end face of the drive wheel, the guide structure being formed by the guide groove; the avoidance port is an avoidance groove which is in butt joint with the guide groove and is parallel to the guide groove.

10. An endoscope, comprising:

and a handle assembly, wherein a traction rope tensioning adjustment mechanism is arranged in the handle assembly, the traction rope tensioning adjustment mechanism is as claimed in any one of claims 1 to 9, a driving wheel in the traction rope tensioning adjustment mechanism is rotationally assembled on a shell of the handle assembly, and the traction rope is connected to a first threaded adjusting piece of the traction rope tensioning adjustment mechanism.