CN219962818U - Traction wheel assembly, endoscope handle and endoscope - Google Patents

Abstract

The utility model provides a traction wheel assembly, an endoscope handle and an endoscope, and belongs to the technical field of endoscopes. The traction wheel assembly comprises a fixing piece and a traction wheel, wherein the fixing piece is used for fixing a traction rope; the traction wheel is provided with a mounting hole for mounting the fixing piece, a wire groove is formed in the side wall of the traction wheel along the circumferential direction of the traction wheel, and the wire groove is communicated with the mounting hole; under the condition that the fixing piece is inserted into the mounting hole, a movable gap is formed between the circumferential side wall of the fixing piece and the inner side wall of the mounting hole, and the fixing piece rotates when the traction rope is pre-tightened and debugged through the movable gap. According to the utility model, through setting the movable gap, the position of the fixing piece in the mounting hole can be adjusted simultaneously when the traction rope is pre-tightened and adjusted, so that the stress of the fixing piece is balanced, the relative position of the fixing piece and the mounting hole is not changed even if the acting force of the traction wheel and the traction rope to the fixing piece is increased in the follow-up rotation, the tension state stability of the traction rope is maintained, and the bending control precision of the active bending section is improved.

Description

Traction wheel assembly, endoscope handle and endoscope

Technical Field

The utility model belongs to the technical field of endoscopes, and particularly relates to a traction wheel assembly, 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.

The endoscope handle is internally provided with a traction wheel which is fixed with the traction rope, and the length of the traction rope between the active bending section and the traction wheel is adjusted by controlling the rotation of the traction wheel so as to control the bending angle of the active bending section; therefore, the traction rope is required to be provided with corresponding pre-tightening tension, so that the bending angle of the active bending section can be accurately controlled through the traction rope.

If the traction rope is a complete and closed rope, the difficulty of adjusting the pre-tightening tension is very high during assembly, so that the traction rope can be assembled in sections and then is butted to form a complete and closed whole in the prior art, thereby realizing force transmission, and after the segmented traction ropes are connected, the pre-tightening force of the traction rope is adjusted through a pre-tightening structure, however, in the prior art, after the pre-tightening force of the traction rope is adjusted, the connection position of the traction rope and the traction wheel changes during rotation of the traction wheel, so that the tensioning state of the traction rope changes, and the bending control precision of the traction rope to an active bending section is affected.

Disclosure of Invention

The utility model aims to provide a traction wheel assembly, an endoscope handle and an endoscope, which solve the technical problems in the prior art.

The utility model is realized in the following way:

in a first aspect, the present utility model provides a traction wheel assembly comprising a securing member for securing a traction rope, and a traction wheel; the traction wheel is provided with a mounting hole for mounting the fixing piece, a wire groove is formed in the side wall of the traction wheel along the circumferential direction of the traction wheel, and the wire groove is communicated with the mounting hole; under the condition that the fixing piece is inserted into the mounting hole, a movable gap is formed between the circumferential side wall of the fixing piece and the inner side wall of the mounting hole, and the fixing piece rotates when the traction rope is pre-tightened and debugged through the movable gap.

In the technical scheme, through setting up the clearance between mounting and mounting hole, reduce frictional force and the connection steadiness between mounting and the mounting hole, when the adjustment of haulage rope pretension, the haulage rope can drive the mounting and rotate in the mounting hole, adjust the position of mounting in the mounting hole for the mounting rotates suitable position in the mounting hole under the drive of haulage rope pretension, reaches the force balance, and the traction wheel is rotated in the follow-up, and when the traction wheel drive haulage rope moved, the relative position of mounting and traction wheel also can not appear changing, and the tensioning state of haulage rope maintains stably, guarantees the bending accuracy of initiative bending section.

Further, the fixing piece comprises a fixing column, the fixing column comprises a first section of column body and a second section of column body which are distributed along the axial direction of the fixing column, and the radial dimension of the first section of column body is smaller than that of the second section of column body; the first section of column body is used for fixing the traction rope; the circumferential side wall of the second section cylinder is in contact with the inner side wall of the mounting hole with the fixing member inserted into the mounting hole.

Further, along the axial direction of the mounting hole, the length of the contact area between the second section of column body and the mounting hole is less than one tenth of the axial length of the mounting hole.

Further, the fixing piece further comprises a base, the base is fixed at the end part of the first section cylinder far away from the second section cylinder, and under the condition that the fixing column is inserted into the mounting hole, the surface of the base close to the fixing column is in contact with the surface of the traction wheel.

Further, the fixing piece is provided with a fixing through hole and an annular groove arranged along the circumferential direction of the fixing piece, and two ends of the fixing through hole are communicated with the annular groove.

Further, the width of the fixing through hole is larger than that of the annular groove along the axial direction of the fixing piece; and/or the traction wheel is provided with an accommodating channel communicated with the wire slot and the mounting hole, under the condition that the fixing piece is inserted into the mounting hole, the fixing through hole is communicated with the accommodating channel, the fixing through hole is positioned between two first side walls of the accommodating channel in the circumferential direction of the traction wheel, the side wall of the fixing through hole in the circumferential direction of the fixing piece is a second side wall, and a space is reserved between the second side wall and the adjacent first side wall; and/or the connection part of the fixing through hole and the annular groove is in smooth transition.

Further, the fixing piece comprises a fixing column and a base, and the base is fixed at the end part of the fixing column; the traction wheel assembly also includes a cover plate for covering a side surface of the traction wheel to secure the base between the cover plate and the traction wheel.

Further, the traction wheel is provided with an accommodating channel communicated with the wire slot and the mounting hole; the connection part of the accommodating channel and the wire slot is in smooth transition, and/or the accommodating channel is of a groove-shaped structure arranged on one side surface of the traction wheel.

In a second aspect, the present utility model provides an endoscope handle comprising a traction wheel assembly of any one of the preceding claims.

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 movable gap is arranged between the circumferential side wall of the fixing piece and the inner side wall of the mounting hole, so that when the traction rope is pre-tightened and debugged, the fixing piece can rotate in the mounting hole, and can be adjusted to a proper position in the mounting hole under the action of the pre-tension force of the traction rope, so that the fixing piece is balanced in stress, the positions in the fixing piece and the mounting hole are not changed even if the subsequent traction wheel rotates and the acting force of the traction rope on the fixing piece is increased, the tensioning state of the traction rope is maintained stable, and the bending control precision of the active bending section is improved;

2. according to the utility model, when the pre-tightening tension of the traction rope is adjusted, the fixing piece is driven to rotate in the mounting hole, so that the stress of the fixing piece is balanced, the tensioning states of the traction ropes at two sides of the fixing piece can be adjusted to the same degree, and the traction ropes at the same tensioning degree at two sides of the fixing piece are beneficial to improving the bending control precision of the active bending section.

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 illustration of a segmented assembly of a towing rope in the related art;

FIG. 2 is a schematic illustration of a traction wheel assembly according to some embodiments of the present utility model;

FIG. 3 is a schematic diagram of a traction sheave structure provided by some embodiments of the present utility model;

FIG. 4 is a detail view at A provided in FIG. 3 in accordance with the present utility model;

FIG. 5 is a schematic view of a fastener according to some embodiments of the present utility model;

FIG. 6 is a schematic illustration of the engagement of a fastener with a traction rope according to some embodiments of the present utility model;

FIG. 7 is a front view of a fastener provided in some embodiments of the present utility model;

FIG. 8 is a second elevation view of a fastener provided in some embodiments of the present utility model;

FIG. 9 is a schematic illustration of a mating structure of a portion of a traction sheave and a fastener according to some embodiments of the present utility model;

FIG. 10 is a schematic diagram showing a second mating structure of a portion of a traction sheave and a fastener according to some embodiments of the present utility model;

FIG. 11 is a schematic diagram illustrating the cooperation between the receiving channel and the fixing hole according to some embodiments of the present utility model;

fig. 12 is a schematic diagram illustrating the cooperation of a traction wheel assembly and a traction rope according to some embodiments of the present utility model.

Reference numerals illustrate:

20-traction wheel, 40-traction rope, 50-pre-tightening structure, 100-fixing piece, 110-fixing column, 111-fixing through hole, 111 a-second side wall, 112-annular groove, 113-first section column, 114-second section column, 120-base, 200-traction wheel, 210-mounting hole, 220-wire slot, 230-containing channel, 231-first side wall, 300-covering plate, 310-limit groove, 400-traction rope and 500-pre-tightening structure.

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, when the traction rope 40 is assembled in a segmented manner, the traction rope 40 is generally assembled in three segments, one segment is connected with the traction wheel 20, the other two segments are connected with the active bending segment, one end of the traction rope 40 connected with the active bending segment is fixed with the active bending segment, the other end of the traction rope is respectively connected with the pretightening member 50, the traction rope 40 connected with the traction wheel 20, any part between two ends of the traction rope 40 is connected with the traction wheel 20, then the traction rope 40 is paved in a wire groove on the circumferential side wall of the traction wheel 20, extends towards the distal end, two ends of the traction rope 40 extending towards the distal end are respectively connected with the corresponding pretightening members 50, as shown in fig. 1, and then the pretightening tension of the corresponding traction rope 40 is debugged by debugging the pretightening members 50.

The traction ropes 40 connected with the traction wheels 20 are generally bound on the fixing pieces firstly, the traction wheels 20 are provided with mounting holes for mounting the fixing pieces, the mounting holes are communicated with the wire grooves, the fixing pieces are generally clamped with the mounting holes, and then the traction ropes 40 on two sides of the fixing pieces are paved along the wire grooves until being connected with the pre-tightening structure 50; when the fixing piece is installed, the fixing piece and the installation hole are required to be aligned, so that when the traction ropes 40 on two sides of the fixing piece extend from the installation hole to the wire slot, the two traction ropes 40 are symmetrically arranged as much as possible, the fixing piece is positioned at a proper position in the installation hole, and when the traction wheel 20 is rotated subsequently, even if the fixing piece is subjected to traction force of the traction ropes 40 on two sides, the fixing piece cannot be rotated in the installation hole to adjust the position.

However, when the fixing member is clamped to the mounting hole, due to the binding mode of the traction rope 40 and the limitation of naked eye errors, when the traction ropes 40 on two sides of the fixing member extend from the mounting hole to the wire slot, the two parts of the traction ropes 40 are not necessarily symmetrically arranged, and the fixing member is not necessarily positioned at a proper position in the mounting hole; when the pretightening structure 50 adjusts the pretightening force on the traction rope 40 to a preset value, and the traction wheel 20 is rotated subsequently, the traction rope 40 is driven to move by the traction wheel 20, at this time, the traction force of the traction rope 40 on the fixing piece under the driving of the traction wheel 20 is larger than the pretightening tension of the traction rope 40, and the fixing piece can be pulled to rotate in the mounting hole, so that if the mounting position of the fixing piece and the mounting hole is unsuitable, the traction rope 40 can pull the fixing piece to rotate in the mounting hole to adjust the position under the rotation of the traction wheel 20, but after the positions of the fixing piece and the mounting hole are changed, the length of the traction rope 40 on two sides of the fixing piece between the traction wheel 20 and the active bending section can be changed, so that the tension state of the traction rope 40 is changed, the traction rope 40 is tightened or loosened, and the bending control precision of the active bending section is lowered when the traction rope 40 is controlled.

In view of this, some embodiments of the present utility model provide a traction wheel assembly, as shown in fig. 2 to 12, by providing a clearance between the fixing member 100 and the mounting hole 210, the fixing member 100 can be pulled to rotate in the mounting hole 210 when the adjustment traction rope 400 is pre-tightened, thereby adjusting the fixing member 100 to a proper position in the mounting hole 210.

The traction wheel 200 assembly comprises a fixing piece 100 and a traction wheel 200, wherein the fixing piece 100 is used for fixing a traction rope 400, the traction wheel 200 is provided with a mounting hole 210 and a wire groove 220, the mounting hole 210 is used for mounting the fixing piece 100, the wire groove 220 is formed in the side wall of the traction wheel 200 along the circumferential direction of the traction wheel, the wire groove 220 is communicated with the mounting hole 210, the wire groove 220 is used for paving the traction rope 400, a movable gap is reserved between the axial side wall of the fixing piece 100 and the inner side wall of the mounting hole 210 under the condition that the fixing piece 100 is inserted into the mounting hole 210, and the fixing piece 100 can rotate through the movable gap when the traction rope 400 is pre-tensioned and debugged.

The movable gap is arranged between the fixing piece 100 and the mounting hole 210, so that friction between the fixing piece 100 and the mounting hole 210 can be reduced, the connection between the fixing piece 100 and the mounting hole 210 is unstable, therefore, after the traction rope 400 is bound on the fixing piece 100, when the pre-tension force of the traction rope 400 is debugged by using the pre-tightening structure 500, the fixing piece 100 is driven to rotate in the mounting hole 210 along with the increase of the pre-tightening tension force of the traction rope 400 at two sides of the fixing piece 100, the fixing piece 100 is debugged to a proper position in the mounting hole 210, so that the fixing piece 100 is stressed and balanced, even if the subsequent traction wheel 200 rotates, the acting force exerted by the traction rope 400 on the fixing piece 100 is increased, but the position of the fixing piece 100 in the mounting hole 210 is not changed, the length of the traction rope 400 between the traction rope 400 and an active bending section is not changed, the tensioning state of the traction rope 400 is maintained stable, and the bending control precision of the active bending section is not changed; the tension state being maintained stably means that the traction wheel 200 returns to the non-rotated position, and the tension state of traction at both sides of the fixing member 100 is maintained consistent with the tension state of the traction rope 400 after the pre-tightening adjustment.

As shown in fig. 12, when the fixing member 100 is in the mounting hole 210 and the fixing member 100 is connected with the traction rope 400, and the traction rope 400 is pre-tightened and debugged, when the fixing member 100 is debugged to a proper position in the mounting hole 210, the stress is balanced because the traction ropes 400 bound on the fixing member 100 are paved in the wire slots 220 in opposite directions, and the traction forces of the traction ropes 400 on two sides of the fixing member 100 to the fixing member 100 are equal, so that the tensioning states of the traction ropes 400 on two sides of the fixing member 100 can be adjusted to the same degree, which is beneficial to improving the bending control precision of an active bending section, and avoiding the influence on the bending precision control of the active bending section due to high tensioning degree and low tensioning degree of the traction ropes 400 on two sides of the fixing member 100.

The fixing member 100 is provided with a related structure binding with the traction rope 400, and in some embodiments, as shown in connection with fig. 5, the fixing member 100 has a fixing through hole 111 and an annular groove 112 provided along the circumferential direction of the fixing member 100, both ends of the fixing through hole 111 are communicated with the annular groove 112; when the traction rope 400 is bound on the fixing piece 100, the traction rope 400 is firstly laid in the annular groove 112, then two ends of the traction rope 400 simultaneously penetrate from the same end of the fixing through hole 111 to the other end, two ends of the traction rope 400 respectively penetrate from two sides of a part of the traction rope 400 crossing the fixing through hole 111, and the positions of the traction rope 400 in the axial direction of the fixing piece 100 are limited by the annular groove 112 and the positions of the traction rope 400 in the radial direction and the axial direction of the fixing piece 100 are limited by the solid through hole, so that the binding modes of the traction rope 400 and the fixing piece 100 are various and are not described one by one.

For being convenient for tie up haulage rope 400 to mounting 100, along the axial of mounting 100, set up the width of fixed through-hole 111 and be greater than the width of ring channel 112, increase the width of fixed through-hole 111, be convenient for haulage rope 400 both ends wear out from fixed through-hole 111, if the width of fixed through-hole 111 is less, when the haulage rope 400 both ends wear out fixed through-hole 111, by the haulage rope 400 spanned on fixed through-hole 111, the clearance space of leaving in advance is not convenient for operate haulage rope 400, and the connecting portion of fixed through-hole 111 and ring channel 112 is smooth transition setting, the connecting portion of fixed through-hole 111 and ring channel 112 does not possess the edges and corners, avoid the haulage rope 400 to tie up behind the mounting 100, the circumstances that stress concentration leads to the haulage rope 400 to damage even fracture appear.

In some embodiments, the fixing through hole 111 is disposed in communication with the accommodating channel 230 under the condition that the fixing member 100 is inserted into the mounting hole 210, and as shown in fig. 11, the fixing through hole 111 is located entirely between two first side walls 231 of the accommodating channel 230 in the circumferential direction of the traction wheel 200, the traction rope 400 penetrating out of the fixing through hole 111 can directly enter the accommodating channel 230 to be laid in the wire groove 220, in order to reduce friction between the traction rope 400 and the first side walls 231 of the accommodating channel 230, the side wall of the fixing through hole 111 in the circumferential direction of the fixing member 100 is set to be a second side wall 111a, a space is provided between the second side wall 111a and an adjacent first side wall 231, the traction rope 400 penetrating out of the fixing through hole 111 is obliquely disposed in the accommodating channel 230 and is not attached to the surface of the first side wall 231, the contact area of the part of the traction rope 400 and the first side wall 231 is small, and friction force is reduced accordingly.

In some embodiments of the present utility model, the connection portion between the accommodating channel 230 and the wire slot 220 is smoothly transited, when the hauling rope 400 passes through the accommodating channel 230 and is laid in the wire slot 220, the contact portion between the hauling rope 400 and the accommodating channel 230 and the wire slot 220 is of a smooth curved surface structure, no stress concentration point occurs, and even if the hauling rope 400 is adjusted to pre-tension, the hauling rope 400 continuously moves between the accommodating channel 230 and the wire slot 220, no stress concentration point occurs to the hauling rope 400, and damage caused by stress concentration of the hauling rope 400 is avoided.

The accommodating channel 230 has various structural forms, which can be a through hole structure, one end of the accommodating channel is communicated with the wire slot 220, and the other end of the accommodating channel is communicated with the mounting hole 210, so that the fixing piece 100 is inconvenient to mount under the structure, and the fixing piece 100 can be mounted in the mounting hole 210 only by passing the hauling rope 400 through the accommodating channel 230; the accommodating channel 230 may also be disposed on the surface of the traction wheel 200 and penetrates through the two side surfaces of the traction channel, when the fixing member 100 is installed in the installation hole 210, the traction rope 400 bound on the fixing member 100 can enter into the accommodating channel 230, so that the assembly is convenient, but the structural strength of the traction wheel 200 is reduced because the accommodating channel 230 penetrates through the two side surfaces of the traction wheel 200, when the traction wheel 200 rotates, the traction force on the traction rope 400 is increased, so that the width of the accommodating channel 230 is increased under the traction of the traction rope 400, and the pretightening state of the traction rope 400 is affected; in some embodiments, as shown in fig. 3 and 4, the accommodating channel 230 is in a groove structure, and is only disposed on one side surface of the traction wheel 200, so that the assembly of the fixing member 100 and the traction rope 400 can be facilitated, the overall structural strength and structural stability of the traction wheel 200 are also less affected, and the width of the accommodating channel 230 can be kept stable.

In some embodiments, the fixing member 100 includes a fixing post 110 and a base 120, the base 120 is fixed at any end of the fixing post 110, the fixing post 110 is inserted into the mounting hole 210, the fixing through hole 111 and the annular groove 112 are disposed on the fixing post 110, after the fixing post 110 is inserted into the mounting hole 210, the surface of the base 120 close to the fixing post 110 is attached to the surface of the traction wheel 200, because there is a clearance between the fixing post 110 and the mounting hole 210, the fixing post 110 and the mounting hole 210 are not tightly connected, in order to prevent the fixing post 110 from moving along the axial direction of the mounting hole 210 in the mounting hole 210, a cover plate 300 is disposed on the surface of the traction wheel 200, the cover plate 300 is used for covering one side surface of the traction wheel 200, the base 120 is fixed between the cover plate 300 and the traction wheel 200, the position of the fixing post 110 in the axial direction of the mounting hole 210 is limited by fixing the position of the base 120, the cover plate 300 is correspondingly provided with a limit groove 310, the limit groove 310 is sleeved outside the base 120, and, in addition to the position for fixing the base 120, the cover plate 300 is circumferentially attached to the position of the traction wheel 120, the limit groove 220 is circumferentially provided in the traction wheel 200, and the limit groove 220 is circumferentially attached to the traction wheel 200, and the limit rope is prevented from being influenced in the bending process.

In some embodiments, the diameter of the fixing post 110 may be smaller than the diameter of the mounting hole 210, and when the fixing post 110 is in the mounting hole 210, a clearance is formed between the circumferential side wall of the fixing post 110 and the inner side wall of the mounting hole 210, under such a structure, the mounting position between the fixing post 110 and the mounting hole 210 is not relatively unique, and the fixing post 110 may be disposed relatively closer to the wire slot 220 or further away from the wire slot 220, so that the position of the base 120 connected with the fixing post 110 on the surface of the traction wheel 200 is not unique, and therefore, the limiting groove 310 on the cover plate 300 can only limit the close contact between the base 120 and the traction wheel 200, and cannot fix the relative position of the base 120 on the traction wheel 200, so that the fixing effect of the cover plate 300 on the base 120 is poor.

In some embodiments, the fixing post 110 may be divided into two parts, including a first section of post 113 and a second section of post 114 distributed along an axial direction thereof, the radial dimension of the first section of post 113 is smaller than the radial dimension of the second section of post 114, where the radial dimension is a post diameter or radius, the annular groove 112 and the fixing through hole 111 are disposed on the first section of post 113, with the fixing member 100 inserted into the mounting hole 210, a circumferential side wall of the second section of post 114 contacts with an inner side wall of the mounting hole 210, a movable gap is formed between the circumferential side wall of the first section of post 113 and the inner side wall of the mounting hole 210, and the position of the fixing post 110 in the mounting hole 210 is supported only by the second section of post 114, so that the position of the fixing post 110 and the mounting hole 210 is relatively unique in a radial direction of the traction wheel 200, and correspondingly, the position of the base 120 connected with the fixing post 110 on the surface of the traction wheel 200 is also unique, and the limit groove 310 on the cover 300 may be sleeved outside the base 120, for fixing the circumferential direction of the base 120, and the relative position of the fixing base 120 and the traction wheel 200.

The radial dimension of the first section cylinder 113 is smaller, on the one hand, in order to leave a clearance, reduce the friction between the fixed column 110 and the mounting hole 210, so that the traction rope 400 pulls the fixed column 110 to rotate in the mounting hole 210, on the other hand, because the traction rope 400 can be bound on the first section cylinder 113, the traction rope 400 is generally positioned in the annular groove 112, when the radial dimension of the traction rope 400 is increased, and the annular groove 112 can not completely accommodate the traction rope 400, part of the traction rope 400 protrudes out of the circumferential side wall of the first section cylinder 113, but because of the dimension difference between the first section cylinder 113 and the second section cylinder 114, the traction rope 400 can not contact the side wall of the mounting hole 210, and normal rotation of the fixing piece 100 in the mounting hole 210 can not be affected.

In addition, since the second-section column 114 needs to contact with the side wall of the mounting hole 210, when the fixing column 110 rotates, friction exists between the second-section column 114 and the side wall of the mounting hole 210, in order to reduce friction force, generally, the contact area between the second-section column 114 and the mounting hole 210 is reduced as much as possible, in some embodiments, the length of the contact area between the second-section column 114 and the mounting hole 210 is less than one tenth of the axial length of the mounting hole 210 along the axial direction of the mounting hole 210, and the contact area between the second-section column 114 and the mounting hole 210 needs to be as little as possible, so that friction force can be reduced while the traction rope 400 is not influenced to pull the fixing column 110 to rotate.

When the base 120 is fixed to the fixing column 110, it may be fixed to an end of the second-stage column 114 far from the first-stage column 113, or may be fixed to an end of the first-stage column 113 far from the second-stage column 114; when the fixing post 110 is fixed to the second section of post 114, as shown in fig. 8, because the base 120 needs to be attached to the surface of the traction wheel 200, the axial length of the second section of post 114 cannot be too long, so that the increase of the friction force between the fixing piece 100 and the mounting hole 210 and the influence on the length of the first section of post 113 are avoided, the axial length of the second section of post 114 is the length of the contact area between the second section of post 114 and the mounting hole 210, the other end of the first section of post 113 is a free end and is suspended in the mounting hole 210, when the fixing piece 100 is in the mounting hole 210, the supporting effect of the traction wheel 200 on the fixing piece 100 is concentrated at one end position of the fixing piece 100, the supporting effect is concentrated, the other side of the fixing piece 100 is not supported, and the position stability of the fixing piece 100 is poor; when the fixing post 110 is fixed to the first section of post 113, as shown in fig. 7, the axial length of the second end main body is not limited, the first section of post 113 is located in the middle, the fixing through hole 111 on the first section of post is more easily aligned with the accommodating channel 230, and the bases 120 at two ends and the second section of post 114 of the fixing piece 100 provide supporting effects for the fixing piece 100, the supporting effects of the traction wheel 200 on the fixing piece 100 are more uniform, the fixing piece 100 is connected with the mounting hole 210, and the relative position of the fixing piece 100 and the mounting hole 210 is more stable under the premise of ensuring a movable gap.

Some embodiments of the present utility model further provide an endoscope handle, including the traction wheel assembly of any one of the embodiments, which has the beneficial effects corresponding to the traction wheel assembly, and will not be described herein.

Some embodiments of the present utility model further provide an endoscope, including the endoscope handle of any one of the above embodiments, where the endoscope of the embodiments of the present utility model may be a bronchoscope, a pyeloscope, an esophagoscope, a gastroscope, a enteroscope, an otoscope, a nasal scope, 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 type 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 sheave assembly, comprising:

a fixing member (100), the fixing member (100) being used for fixing the traction rope (400);

a traction wheel (200), wherein the traction wheel (200) is provided with a mounting hole (210) for mounting the fixing piece (100), a wire groove (220) is arranged on the side wall of the traction wheel (200) along the circumferential direction, and the wire groove (220) is communicated with the mounting hole (210);

under the condition that the fixing piece (100) is inserted into the mounting hole (210), a movable gap is formed between the circumferential side wall of the fixing piece (100) and the inner side wall of the mounting hole (210), and the fixing piece (100) rotates when the traction rope (400) is pre-tightened and debugged through the movable gap.

2. A traction wheel assembly according to claim 1, wherein,

the fixing piece (100) comprises a fixing column (110), wherein the fixing column (110) comprises a first section column body (113) and a second section column body (114) which are distributed along the axial direction of the fixing column, and the radial dimension of the first section column body (113) is smaller than that of the second section column body (114);

the first section of column body (113) is used for fixing a traction rope (400);

with the fixing member (100) inserted into the mounting hole (210), the circumferential side wall of the second-stage cylinder (114) is in contact with the inner side wall of the mounting hole (210).

3. A traction wheel assembly as claimed in claim 2, wherein,

along the axial direction of the mounting hole (210), the length of the contact area between the second section cylinder (114) and the mounting hole (210) is less than one tenth of the axial length of the mounting hole (210).

4. A traction wheel assembly as claimed in claim 2, wherein,

the fixing piece (100) further comprises a base (120), the base (120) is fixed at the end part of the first section cylinder (113) far away from the second section cylinder (114), and the surface of the base (120) close to the fixing column (110) is in surface contact with the traction wheel (200) under the condition that the fixing piece (100) is inserted into the mounting hole (210).

5. A traction wheel assembly according to claim 1, wherein,

the fixing piece (100) is provided with a fixing through hole (111) and an annular groove (112) arranged along the circumferential direction of the fixing piece (100), and two ends of the fixing through hole (111) are communicated with the annular groove (112).

6. A traction wheel assembly according to claim 5, wherein,

the width of the fixing through hole (111) is larger than the width of the annular groove (112) along the axial direction of the fixing piece (100);

and/or the traction wheel (200) is provided with a containing channel (230) which is communicated with the wire groove (220) and the mounting hole (210); in the case that the fixing member (100) is inserted into the mounting hole (210), the fixing through hole (111) is communicated with the accommodating channel (230), the fixing through hole (111) is positioned between two first side walls (231) of the accommodating channel (230) in the circumferential direction of the traction wheel (200), the side wall of the fixing through hole (111) positioned in the circumferential direction of the fixing member (100) is a second side wall (111 a), and a space is reserved between the second side wall (111 a) and the adjacent first side wall (231);

and/or the connection part of the fixing through hole (111) and the annular groove (112) is smoothly transited.

7. A traction wheel assembly according to claim 1, wherein,

the fixing piece (100) comprises a fixing column (110) and a base (120), and the base (120) is fixed at the end part of the fixing column (110); the traction wheel (200) assembly further comprises a cover plate (300), wherein the cover plate (300) is used for covering one side surface of the traction wheel (200) so as to fix the base (120) between the cover plate (300) and the traction wheel (200).

8. A traction wheel assembly according to claim 1, wherein,

the traction wheel (200) is provided with a containing channel (230) which is communicated with the wire groove (220) and the mounting hole (210);

the connection part of the accommodating channel (230) and the wire slot (220) is in smooth transition, and/or the accommodating channel (230) is in a groove-shaped structure arranged on one side surface of the traction wheel (200).

9. An endoscope handle comprising the traction wheel assembly of any one of claims 1-8.

10. An endoscope comprising the endoscope handle of claim 9.