A traction rope tension adjustment mechanism, endoscope handle and endoscope

Abstract

The present invention provides a traction rope tension adjustment mechanism, an endoscope handle and an endoscope, and belongs to the technical field of endoscopes. The tension adjustment mechanism includes a sleeve and a telescopic assembly, the sleeve is used to be sleeved outside the traction rope, the telescopic assembly is installed on the handle of the endoscope, and the telescopic assembly is located at the proximal end of the sleeve, and abuts against the sleeve; the telescopic assembly includes an axially arranged first rotating member and a first matching member, the first rotating member can rotate under the action of an external force, and drive the first matching member to move relative to the first rotating member along a first direction, so that the axial length of the telescopic assembly is extended or shortened, thereby driving the contact part between the telescopic assembly and the sleeve to approach or move away from the distal end of the sleeve along the first direction, and the first direction is the axial direction of the rotating shaft of the first rotating member. The present invention adjusts and controls the position of the sleeve by controlling the rotation of the first rotating member, and the adjustment accuracy of the position of the sleeve is high, which can improve the adjustment accuracy of the tension of the traction rope.

Description

Technical Field

[0001] The invention belongs to the technical field of endoscopes, and in particular relates to a traction rope tension adjustment mechanism, an endoscope handle and an endoscope. Background Art

[0002] As a medical device, the insertion part of the endoscope can enter the human body to take images of the lesions and provide doctors with sufficient diagnostic information to treat the disease.

[0003] The distal end of the insertion part is the active bending section, and a traction wheel is provided in the endoscope handle, and a traction rope is connected between the traction wheel and the active bending section. Due to the irregularity of the human body cavity, when the active bending section enters different human cavities, it is necessary to rotate the traction wheel, thereby pulling the traction rope to control the bending of the active bending section, and adaptively adjust the bending angle of the active bending section to adapt to different cavities.

[0004] The endoscope handle is also provided with a tension adjustment mechanism for adjusting the tension of the traction rope to ensure the operational flexibility and accuracy of the bending angle of the active bending section. However, the existing tension adjustment mechanism has poor tension adjustment accuracy during the process of adjusting the tension of the traction rope. Summary of the invention

[0005] The purpose of this application is to provide a traction rope tension adjustment mechanism, an endoscope handle and an endoscope to solve the above-mentioned technical problems existing in the prior art.

[0006] This application is implemented as follows:

[0007] In the first aspect, an embodiment of the present application provides a traction rope tension adjustment mechanism, which is applied to an endoscope, including a sleeve and a telescopic assembly, wherein the sleeve is used to be sleeved on the outside of the traction rope, the telescopic assembly is installed on the handle of the endoscope, and the telescopic assembly is located at the proximal end of the sleeve and abuts against the sleeve; the telescopic assembly includes an axially arranged first rotating member and a first matching member, the first rotating member and the first matching member are connected, and the first rotating member can rotate under the action of an external force, and drive the first matching member to move along a first direction relative to the first rotating member, so that the axial length of the telescopic assembly is extended or shortened, thereby driving the contact part between the telescopic assembly and the sleeve to approach or move away from the distal end of the sleeve along the first direction, and the first direction is the axial direction of the rotation axis of the first rotating member.

[0008] In a second aspect, an embodiment of the present application provides an endoscope handle, comprising the traction rope tension adjustment mechanism provided in the embodiment of the first aspect.

[0009] In a third aspect, an embodiment of the present application provides an endoscope, comprising an endoscope handle, the endoscope handle comprising the traction rope tension adjustment mechanism provided in the embodiment of the first aspect, the first inclination angle of the traction rope tension adjustment mechanism being greater than the second inclination angle; when the first rotating surface and the first mating surface are in contact with each other, the traction rope is in a relaxed state; when the distance between the first rotating surface and the first mating surface is at a maximum, the traction rope is in a tensioned state.

[0010] The technical solution adopted by the present invention can achieve the following beneficial effects:

[0011] In the present application, the telescopic component is brought into contact with the sleeve, and the position of the sleeve is adjusted by controlling the extension or shortening of the telescopic component, thereby adjusting the tension of the traction rope; a first rotating member is arranged to cooperate with a first matching member, and the rotational motion of the first rotating member is converted into a linear motion of the first matching member, and the extension or shortening of the telescopic component is controlled to drive the sleeve to move, and the overall operation is simple and convenient; and the position of the sleeve is adjusted and controlled by controlling the rotation of the first rotating member, and the adjustment accuracy of the position of the sleeve is high, which can improve the adjustment accuracy of the tension of the traction rope. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments of the present invention or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 This is a schematic diagram of the coordination between the tension adjustment mechanism and the endoscope provided in some embodiments of the present application. Figure 1 ;

[0014] Figure 2 This application is about Figure 1 Detailed view of point A;

[0015] Figure 3 This is a schematic diagram of the coordination between the tension adjustment mechanism and the endoscope provided in some embodiments of the present application. Figure 2 ;

[0016] Figure 4 This application is about Figure 3 Detail of point B;

[0017] Figure 5 is a cross-sectional view of a tension adjustment structure and an endoscope provided in some embodiments of the present application;

[0018] Figure 6 This application is about Figure 5 Detailed view of point C;

[0019] Figure 7 The overall structure of the tension adjustment mechanism provided in some embodiments of the present application is shown in FIG. Figure 1 ;

[0020] Figure 8 The overall structure of the tension adjustment mechanism provided in some embodiments of the present application is shown in FIG. Figure 2 ;

[0021] Fig. 9 This is a schematic diagram of the structure of the telescopic assembly provided in some embodiments of the present application. Figure 1 ;

[0022] Fig.10 This is a schematic diagram of the structure of the telescopic assembly provided in some embodiments of the present application. Figure 2 ;

[0023] Fig.11 This is a schematic diagram of the structure of the telescopic assembly provided in some embodiments of the present application. Figure 3 ;

[0024] Fig.12 This is a schematic diagram of the disassembly of the telescopic assembly and the housing provided in some embodiments of the present application. Figure 1 ;

[0025] Fig.13 This is a schematic diagram of the disassembly of the telescopic assembly and the housing provided in some embodiments of the present application. Figure 2 .

[0026] In the figure: 100-handle, 110-first through hole, 200-traction rope, 300-sleeve, 400-telescopic assembly, 410-first rotating member, 411-first rotating surface, 420-first matching member, 421-first matching surface, 430-second rotating member, 431-second rotating surface, 440-second matching member, 441-second matching surface, 500-housing, 510-second through hole, 520-plug, 600-elastic member, 700-handle, 800-support. DETAILED DESCRIPTION

[0027] The following description provides many different embodiments or examples for implementing different features of the present invention. The components and arrangements described in the following specific examples are only used to simplify the present invention and are only used as examples, not to limit the present invention.

[0028] It should be noted that, in each embodiment of the present application, "proximal end" and "distal end" refer to the position of the endoscope and its accessories relative to the user in the use environment, wherein the end closer to the user is designated as the "proximal end" and the end farther from the user is designated as the "distal end".

[0029] In existing endoscopes, the tension of the traction rope is easily too large or too small, and it is difficult to adjust to an appropriate size. The inventors have found that in the existing endoscope structure, the tension of the traction rope is generally adjusted by fixing a clamping structure outside the sleeve, and then setting multiple clamping slots in the handle, and installing the clamping structure in different clamping slots. Since the clamping structure can only be changed between multiple clamping slots to adjust the tension of the traction rope, the adjustment accuracy is poor.

[0030] In view of this, the embodiment of the present application provides a traction rope tension adjustment mechanism, which is applied to an endoscope, and includes a sleeve 300 and a telescopic assembly 400. The sleeve 300 is used to be sleeved outside the traction rope 200, and the telescopic assembly 400 is installed on the handle 100 of the endoscope, and the telescopic assembly 400 is located at the proximal end of the sleeve 300 and abuts against the sleeve 300.

[0031] refer to Figures 9 to 13 As shown, the telescopic assembly 400 includes a first rotating member 410 and a first matching member 420 arranged along its axial direction. The first rotating member 410 and the first matching member 420 are connected, and the first rotating member 410 can rotate under the action of an external force, and drive the first matching member 420 to move relative to the first rotating member 410 along a first direction, so that the axial length of the telescopic assembly 400 is extended or shortened, thereby driving the contact portion of the telescopic assembly 400 and the sleeve 300 to approach or move away from the distal end of the sleeve 300 along the first direction, and the first direction is the axial direction of the rotation axis of the first rotating member 410.

[0032] The extension and shortening of the telescopic assembly 400 is achieved through the cooperation of the first rotating member 410 and the first matching member 420. The first rotating member 410 rotates to push the first matching member 420 to move along the first direction relative to the first rotating member 410. The overall length of the telescopic assembly 400 changes along the first direction. The axial direction of the telescopic assembly 400 is the first direction. The telescopic direction of the telescopic assembly 400, the moving direction of the first matching member 420 relative to the first rotating member 410, and the moving direction of the proximal end of the sleeve 300 are all the same.

[0033] The axial length of the telescopic component 400 is variable, and because the telescopic component 400 is abutted against the sleeve 300, as the axial length of the telescopic component 400 changes, the proximal end of the sleeve 300 can be driven to move toward a position close to or away from its distal end, thereby changing the position of the sleeve 300 relative to the endoscope handle 100 and adjusting the tension of the traction rope 200 passing through the sleeve 300.

[0034] The casing 300 is a tubular structure, which can be referred to Figure 1 , Figure 2 , Figures 5 to 13As shown, the sleeve 300 is sleeved on the outside of the traction rope 200 to protect the traction rope 200 and prevent the traction rope 200 from rubbing against other components in the endoscope during the process of pulling the traction rope 200, thereby preventing the traction rope 200 from being damaged in the structure.

[0035] It should be explained that the sleeve 300 is a tubular structure that is difficult to be axially compressed or stretched, and can be a spring tube, a braided tube, or a full-round tube, etc., and the material can be metal or plastic. Since the sleeve 300 is difficult to be axially compressed or stretched, the sleeve 300 is sleeved on the traction rope 200, and the length of the traction rope 200 in the sleeve 300 is unchanged. Even if the sleeve 300 is bent and deformed under the action of external force, the axial length of the sleeve 300 is almost unchanged, and the length of the traction rope 200 in the sleeve 300 will not change.

[0036] The telescopic assembly 400 is in contact with the proximal end of the sleeve 300, and the movement of the sleeve 300 is controlled by controlling the extension or shortening of the telescopic assembly 400. In the endoscope, both ends of the traction rope 200 are fixed, wherein the distal end of the traction rope 200 is fixed to the distal end of the insertion part of the endoscope, and the proximal end of the traction rope 200 is fixed to the traction wheel in the handle 100. The sleeve 300 is sleeved outside the traction rope 200. When the operator controls the telescopic assembly 400 to extend and retract, when the distal end of the sleeve 300 is pressed against the insertion part, the sleeve 300 can no longer move distally. If the proximal end of the sleeve 300 is pressed against the insertion part, the sleeve 300 will bend.

[0037] Since the positions of the proximal and distal ends of the traction rope 200 are fixed, and the length of the traction rope 200 in the sleeve 300 is also unchanged, even if the sleeve 300 is bent, the length of the traction rope 200 in the sleeve 300 will not change. However, during the bending of the sleeve 300, the proximal end of the sleeve 300 will move toward its distal end as the telescopic structure is extended, and the distance between the proximal end of the sleeve 300 and the distal end of the traction rope 200 is reduced, and the distance between the proximal end of the sleeve 300 and the proximal end of the traction rope 200 gradually increases. However, since the length of the traction rope 200 in the sleeve 300 will not change, the part of the traction rope 200 between the proximal end of the sleeve 300 and the proximal end of the traction rope 200 will be stretched and the length will increase, which will cause the overall length of the traction rope 200 to increase, thereby increasing the tension of the traction rope 200.

[0038] When it is necessary to lower the tension of the traction rope 200, the telescopic assembly 400 is controlled to shorten, and the proximal end of the sleeve 300 pressed against the telescopic assembly 400 will move in a direction away from its distal end, thereby reducing the bending degree of the sleeve 300, and the proximal end of the sleeve 300 approaches the proximal end of the traction rope 200, shortening the length of the traction rope 200 between the proximal ends of the sleeve 300 and the proximal ends of the traction rope 200, thereby lowering the tension of the traction rope 200.

[0039] It should be noted that since the telescopic assembly 400 provided in the embodiment of the present application uses its extension or contraction to control the movement of the sleeve 300, when the axial length of the telescopic assembly 400 is at the shortest, the telescopic assembly 400 also needs to be tightly pressed against the proximal end of the sleeve 300.

[0040] In the embodiment provided in the present application, the first rotating member 410 and the first matching member 420 are used to cooperate to control the rotation of the first rotating member 410, and the rotational motion of the first rotating member 410 is converted into the linear motion of the first matching member 420, so as to control the axial length of the telescopic assembly 400 and drive the sleeve 300 to move. The overall operation process is simple and convenient, and the adjustment accuracy of the position of the sleeve 300 is high, which can correspondingly improve the adjustment accuracy of the tension of the traction rope 200; and, since the rotation of the first rotating member 410 is converted into the movement of the sleeve 300, by controlling the rotation angle of the first rotating member 410, the tension of the traction rope 200 can be almost achieved steplessly.

[0041] In addition, since the movement of the sleeve 300 is controlled by the extension and retraction of the telescopic assembly 400 in the present application, when the telescopic assembly 400 is extended, it needs to extend toward the distal end of the sleeve 300, shortening the distance between the telescopic assembly 400 and the distal end of the sleeve 300, so that the sleeve 300 can be pushed to move during the extension process. When the telescopic assembly 400 is shortened, it needs to shorten in a direction away from the sleeve 300, increasing the distance between the telescopic assembly 400 and the distal end of the sleeve 300, so that a movable space can be reserved for the sleeve 300 during the shortening process, and the proximal end of the sleeve 300 can move toward the proximal end of the traction rope 200.

[0042] In some embodiments, one of the first rotating member 410 and the first matching member 420 that is away from the sleeve 300 is configured to cooperate with the handle 100 in a limited position in the first direction, and the component that cooperates with the handle 100 in the limited position in the first direction can no longer move relative to the handle 100 in the first direction, thereby limiting the telescopic direction of the telescopic assembly 400. Exemplarily, if the first matching member 420 is close to the sleeve 300 and the first rotating member 410 is away from the sleeve 300, the first rotating member 410 is fixed relative to the handle 100 in the first direction, and the first matching member 420 can move in the first direction; if the first rotating member 410 is close to the sleeve 300 and the first matching member 420 is away from the sleeve 300, the first matching member 420 is fixed relative to the handle 100 in the first direction, and the first rotating member 410 can move in the first direction.

[0043] Furthermore, the first matching member 420 is limitedly matched with the handle 100 along the rotation direction of the first rotating member 410. The first matching member 420 is limitedly matched with the handle 100 to prevent the first matching member 420 from rotating with the rotation of the first rotating member 410, resulting in misadjustment of the axial length of the telescopic assembly 400.

[0044] In some specific embodiments, the connection between the first rotating member 410 and the first matching member 420 can be a threaded connection. By rotating the first rotating member 410, the threaded connection area between the two increases or decreases, thereby controlling the axial length of the telescopic assembly 400.

[0045] In some other specific embodiments, the connection between the first rotating member 410 and the first matching member 420 may also be a contact fit, see Figures 9 to 11 The first rotating member 410 has a first rotating surface 411, and the first matching member 420 has a first matching surface 421. The first rotating surface 411 and the first matching surface 421 are in contact and matched, and the first rotating surface 411 and the first matching surface 421 are both inclined relative to the cross section of the first rotating member 410, and the inclination angles are the same. The cross section of the first rotating member 410 is a cross section perpendicular to its rotation axis.

[0046] The telescopic assembly 400 further includes an elastic member 600, which is connected to one of the first rotating member 410 and the first matching member 420 that is close to the sleeve 300, so that the first rotating surface 411 and the first matching surface 421 are tightly matched. When the first rotating member 410 is at a suitable angle, the first rotating surface 411 can be completely fitted with the first matching surface 421. In this state, the first rotating member 410 continues to rotate. Since the first rotating surface 411 and the first matching surface 421 are both inclined, the first rotating surface 411 cannot continue to be completely fitted with the first matching surface 421, and a gap will appear between the two, thereby causing the axial length of the telescopic assembly 400 to change. The elastic member 600 makes the first rotating member 410 and the first matching member 420 tightly fit, ensuring that the axial length of the telescopic assembly 400 can change with the rotation of the first rotating member 410.

[0047] The first rotating surface 411 and the first matching surface 421 are matched, and the overall structure is simple, and the assembly of the telescopic assembly 400 is also simple and quick. The surfaces are tightly pressed against each other and are not easily damaged. Even if the surface structure is partially damaged, it does not affect the control of the axial length of the telescopic assembly 400 by the position change between the first rotating surface 411 and the first matching surface 421.

[0048] The elastic member 600 may be connected between the first rotating member 410 and the first matching member 420, and the axial direction of the elastic member 600 is coaxial with the axial direction of the first rotating member 410. When the first rotating member 410 and the first matching member 420 are away from each other, the elastic member 600 is stretched. The elastic member 600 may also be arranged on a side of the telescopic assembly 400 close to the sleeve 300, and the side of the telescopic assembly 400 away from the sleeve 300 cooperates with the handle 100 to limit the position, and the elastic member 600 is pressed against the telescopic assembly 400 to ensure the stability of the axial length of the telescopic assembly 400.

[0049] In some preferred embodiments, the adjustment mechanism further comprises a casing 500, Figure 1 , Figure 2 , Figures 5 to 8As shown, the casing 500 is sleeved outside the sleeve 300, and the casing 500 is fixedly connected to the handle 100. The telescopic assembly 400 and the elastic member 600 are both installed in the casing 500. The first rotating member 410 and the first matching member 420 of the telescopic assembly 400 are both connected to the handle 100 through the casing 500. Exemplarily, one of the first rotating member 410 and the first matching member 420 away from the sleeve 300 is limitedly matched with the casing 500 along the first direction, and the first matching member 420 is limitedly matched with the casing 500 along the rotation direction of the first rotating member 410. The first rotating member 410 and the first matching member 420 move in the casing 500, and the sleeve 300 is pressed against the first rotating member 410 or the first matching member 420. One end of the elastic member 600 is connected to the casing 500, and the other end is pressed against the one of the first rotating member 410 and the first matching member 420 close to the sleeve 300.

[0050] By setting the cover 500, the first rotating member 410, the first matching member 420 and the elastic member 600 can be assembled in advance. In the subsequent assembly process of the endoscope, it is only necessary to cover the cover 500 on the outside of the sleeve 300, and the assembly process of the tension adjustment mechanism of the traction rope 200 can be simplified, which is conducive to improving the assembly efficiency of the endoscope. In addition, by setting the cover 500 to assemble the telescopic component 400, it is possible to avoid improving the structure of the handle 100, and directly use the existing handle 100 production line. The cover 500 is covered on the outside of the telescopic component 400, and the restraining effect on the telescopic component 400 is better, ensuring that the telescopic component 400 can be extended or shortened along the preset direction, and the telescopic action of the telescopic structure is stable.

[0051] The housing 500 can be directly fixed to the inside of the handle 100, or connected to the handle 100 through the support 800. Figures 6 to 8 According to the actual position of the casing 500 , the height of the support 800 is adjusted so that the casing 500 can be aligned with the sleeve 300 .

[0052] In some specific embodiments, a guide structure can be set between the first matching member 420 and the inner wall of the shell 500, and the guiding direction is the first direction, so that the first matching member 420 can only move along the first direction, avoiding the first matching member 420 from rotating synchronously with the first rotating member 410.

[0053] When the first rotating member 410 is away from the sleeve 300, the first rotating member 410 and the sleeve shell 500 are matched in the upper limit position in the first direction. An annular guide structure can be provided between the first rotating member 410 and the sleeve shell 500, so that the first rotating member 410 can rotate in the sleeve shell 500 but cannot move in the sleeve shell 500 along the first direction; a plug 520 can also be directly provided at the end of the sleeve shell 500 away from the sleeve 300, and the plug 520 blocks the space inside the sleeve shell 500. The structure of the plug 520 can refer to Fig.12 and Fig.13 One end of the first rotating member 410 is in contact with the plug 520, and the other end is in contact with the elastic member 600, so that during the rotation of the first rotating member 410, the first matching member 420 can be driven to move relative to the casing 500 along the first direction, thereby preventing the first rotating member 410 from moving relative to the casing 500 in the first direction.

[0054] When the first matching member 420 is away from the sleeve 300, the first matching member 420 needs to be limitedly matched with the sleeve 500 in the first direction and in the rotation direction of the first rotating member 410, and the first matching member 420 can be directly fixed inside the sleeve 500. A guide structure can also be provided between the first matching member 420 and the sleeve 500, and the first matching member 420 is pressed against the plug 520 of the sleeve 500.

[0055] In some embodiments of the present application, reference Figures 9 to 13 As shown, the telescopic assembly 400 further includes a second rotating member 430 and a second matching member 440, both of which are located at the proximal end of the sleeve 300 and at the distal end of the first rotating member 410 and the first matching member 420. One of the second rotating member 430 and the second matching member 440 is tightly matched with the sleeve 300.

[0056] The second rotating member 430 and the second matching member 440 are also installed in the sleeve shell 500, and the elastic member 600 abuts against the one of the second rotating member 430 and the second matching member 440 closer to the sleeve 300 to drive the first rotating member 410, the first matching member 420, the second rotating member 430 and the second matching member 440 to fit tightly.

[0057] When the first rotating member 410 drives the first matching member 420 to move along the first direction, it will simultaneously drive the second rotating member 430 and the second matching member 440 located at the far end of the two to move synchronously. The elastic member 600 is arranged at the far end of the telescopic assembly 400. The elastic member 600 can press the four together, so that the axial length of the telescopic assembly 400 can be kept stable. A plug 520 can also be arranged at one end of the housing 500 close to the elastic member 600. Fig.12 and Fig.13As shown, the plug 520 is threadedly mounted to the housing 500 . The elastic member 600 is directly pressed between the plug 520 and the second fitting member 440 , or the elastic member 600 is mounted between the plug 520 and the second rotating member 430 .

[0058] The connection between the second rotating member 430 and the second matching member 440 is similar to the connection between the first rotating member 410 and the first matching member 420. The second rotating member 430 can rotate under the action of an external force to drive the second matching member 440 to move along the first direction relative to the second rotating member 430, so that the axial length of the telescopic assembly 400 is extended or shortened, thereby driving the contact part between the telescopic assembly 400 and the sleeve 300 to move along the first direction. The rotation of the second rotating member 430 is coaxial with the rotation axis of the first rotating member 410.

[0059] At the same time, the second matching member 440 is limitedly matched with the sleeve 500 along the circumference of the second rotating member 430 to prevent the second matching member 440 from rotating synchronously with the first rotating member 410 or the second rotating member 430. Fig.10 As shown, a guide groove may be provided on the second matching member 440 , and correspondingly, a guide block may be provided on the inner wall of the housing 500 , so that the movement direction of the second matching member 440 is limited by the cooperation between the guide groove and the guide block.

[0060] In some preferred embodiments, as shown in FIG. 12 , the second rotating member 430 has a second rotating surface 431. Fig.13 As shown, the second matching member 440 has a second matching surface 441. The second rotating surface 431 contacts and matches with the second matching surface 441, and the second rotating surface 431 and the second matching surface 441 are both inclined relative to the cross section of the second rotating member 430, and the inclination angles are the same.

[0061] Similar to the structure of the first rotating member 410 and the first matching member 420, the second rotating member 430 and the second matching member 440 also achieve the change of the axial length of the telescopic assembly 400 through surface-to-surface contact. No further details are given here. By setting two sets of structures to adjust the axial length of the telescopic assembly 400, the adjustment range of the tension of the traction rope 200 can be increased, thereby increasing the applicable range of the endoscope.

[0062] Further preferably, the inclination angle of the first rotating surface 411 relative to the cross section of the first rotating member 410 is a first inclination angle, Fig.11As shown, the cross section of the first rotating member 410 is represented by a dotted line passing through the first rotating member 410, and the first inclination angle is represented by the letter a. The inclination angle of the second rotating surface 431 relative to the cross section of the second rotating member 430 is the second inclination angle, and the cross section of the second rotating member 430 is represented by a dotted line passing through the second rotating member 430, and the second inclination angle is represented by the letter b. The first inclination angle is not equal to the second inclination angle, indicating that the two sets of structures have different adjustment ranges for the axial length of the telescopic assembly 400. The two sets of structures are used in combination to further improve the adjustment accuracy of the axial length of the telescopic assembly 400 and improve the tension adjustment accuracy of the traction rope 200.

[0063] The friction resistance between the first rotating member 410 and the casing 500, and between the second rotating member 430 and the casing 500 needs to be large enough to prevent the first rotating member 410 and the second rotating member 430 from self-resetting after rotation. The friction force can be increased by providing protrusions on the outer peripheral walls of the first rotating member 410 and the second rotating member 430. In some embodiments, protrusions can also be provided on the outer peripheral walls of the first rotating member 410 and the second rotating member 430, and grooves can be provided on the inner wall of the casing 500, and the positions of the first rotating member 410 and the second rotating member 430 can be adjusted by the clamping of the grooves and the protrusions.

[0064] The friction coefficient between the first rotating member 410 and the casing 500 is the first friction coefficient, and the friction coefficient between the second rotating member 430 and the casing 500 is the second friction coefficient. The first rotating member 410, the first matching member 420, the second rotating member 430 and the second matching member 440 are all installed inside the casing 500, and the four are tightly matched. When the second rotating member 430 and the first rotating member 410 are in contact with each other, Fig.10 As shown, the friction coefficient between the second rotating member 430 and the first rotating member 410 is the third friction coefficient, and both the first friction coefficient and the second friction coefficient are greater than the third friction coefficient. When the first rotating member 410 is rotated, the friction force between the first rotating member 410 and the second rotating member 430 is insufficient to drive the second rotating member 430 to rotate, so that the first rotating member 410 and the second rotating member 430 are independent of each other, and the synchronous rotation of the two is prevented from affecting the adjustment operation of the tension of the traction rope 200.

[0065] In some preferred embodiments, the first rotating member 410 is located between the first matching member 420 and the second matching member 440. Fig. 9 As shown, the second rotating member 430 is directly pressed against the sleeve 300, and a limiting structure is set between the second rotating member 430 and the sleeve shell 500. Therefore, even if the friction between the first rotating member 410 and the second matching member 440 is large, rotating the first rotating member 410 will not drive the second matching member 440 to rotate synchronously.

[0066] In some embodiments, the first rotating member 410 is connected to a handle 700, and the handle 700 is used to control the rotation of the first rotating member 410, which is more convenient for controlling the position of the first rotating member 410. Preferably, the handle 700 passes through the handle 100 to extend outside the handle 100. The handle 700 is located outside the handle 100, and the tension of the traction rope 200 can be adjusted even in the later use of the endoscope. Exemplarily, the handle 100 is provided with a first through hole 110, and the first through hole 110 is provided on the handle 100. Figures 1 to 4 As shown, the handle 700 passes through the first through hole 110 and extends from the inside of the handle 100 to the outside of the handle 100 .

[0067] Adjusting the tension of the traction rope 200 during the use of the endoscope can avoid adjusting the tension of the traction rope 200 to a preset value during the factory delivery of the endoscope, avoid the pulling force of the traction rope 200 on the insertion part when the endoscope is not in use, and avoid the snake joints of the insertion part being subjected to long-term tension and structural deformation.

[0068] When the first rotating member 410 and the first matching member 420 are both installed in the casing 500, the casing 500 is provided with a second through hole 510 for the handle 700 to pass through. Figure 8 It should be noted that when the first rotating member 410 needs to move relative to the casing 500 along the first direction, the first through hole 110 and the second through hole 510 need to have a certain width in the first direction to provide a movable space for the handle 700.

[0069] When the telescopic assembly 400 includes the second matching member 440 and the second rotating member 430 , the second rotating member 430 is also connected to a handle 700 , and the handle 700 also passes through the housing 500 and the handle 100 .

[0070] During the use of the endoscope, the position of the first rotating member 410 or the second rotating member 430 can be adjusted by controlling the handle 700 outside the handle 100. A corresponding mark can be set on the outer wall of the handle 100, refer to Figure 3 and Figure 4 As shown, it is convenient for the operator to accurately determine the handle 700 corresponding to the first rotating member 410 and the second rotating member 430 according to the markings.

[0071] In some preferred embodiments, when the axial length of the telescopic assembly 400 is at the shortest, the traction rope 200 is in a relaxed state. As the axial length of the telescopic assembly 400 gradually increases, the traction rope 200 gradually changes from a relaxed state to a tensioned state.

[0072] When the traction rope 200 is in a relaxed state, the control accuracy of the traction rope 200 on the insertion part is poor, and pulling the traction rope 200 will hardly affect the bending angle of the insertion part. When the endoscope is pulled out of the human body, the axial length of the telescopic assembly 400 is adjusted to the shortest, and the insertion part is taken out of the human body at this time. The insertion part will bend naturally according to the curvature of the human body cavity, and the operator can easily take the insertion part out of the human body. In the process of taking it out, the discomfort caused by the insertion part to the human body is very weak.

[0073] When the traction rope 200 is in a tensioned state, the active bending section of the insertion part can be driven to bend by pulling the traction rope 200. The rotation angles of the first rotating member 410 and the second rotating member 430 are controlled to control the axial length of the telescopic assembly 400, so that the tension of the traction rope 200 is different. When the tension of the traction rope 200 is appropriate, the control accuracy of the active bending section by the traction rope 200 is high, and the bending angle and bending direction of the active bending section can be adjusted normally. When the tension of the traction rope 200 is too large, the rigidity of the active bending section will be too large, the adjustability will be poor, and the active bending section will not be easily deformed, which is convenient for insertion into the human body cavity.

[0074] In some embodiments, in order to facilitate the control of the insertion operation of the active bending section, by controlling the size of the first tilt angle and the second tilt angle, the overall length of the first rotating member 410 and the first matching member 420 is the longest, and when the second rotating member 430 is not rotated, the traction rope 200 is at a suitable tension size. At this time, the traction rope 200 has a high control accuracy over the active bending section, and the bending angle of the active bending section can be flexibly adjusted. Continue to rotate the second rotating member 430, when the overall length of the second rotating member 430 and the second matching member 440 reaches the longest, the tension of the traction rope 200 reaches the maximum, and the rigidity of the active bending section reaches the maximum, which is convenient for maintaining the shape of the active bending section. Therefore, the cooperation of the first rotating member 410 and the second rotating member 430 can be used to flexibly adjust the rigidity of the active bending section and improve the convenience of inserting the insertion part into the human body.

[0075] For example, when encountering a cavity section that needs to be directly inserted, tighten the second rotating member 430 and the first rotating member 410 to maintain the shape of the active bending section, and move the active bending section directly along the direction of the cavity to reduce the possibility of accidental changes in the shape of the active bending section causing it to collide with the inside of the cavity; when encountering a curved cavity section, loosen the second rotating member 430, and then use the traction rope 200 to adjust the bending angle of the active bending section to adapt to the curved cavity.

[0076] The first rotating member 410 or the second rotating member 430 is adjusted to the maximum rotation angle, that is, the corresponding handle 700 is moved to the limit. During the operation, the operator only needs to move the handle 700 back and forth between the starting point and the end point, which is simple and convenient to operate.

[0077] The telescopic assembly 400 can be located outside the traction rope 200 and directly abut against the sleeve 300. In some preferred embodiments, the first rotating member 410 and the second rotating member 430 are both sleeved outside the traction rope 200 corresponding to the sleeve 300. The telescopic assembly 400 can limit the extension path of the traction rope 200 to a certain extent and stabilize the position of the traction rope 200. In addition, the abutment between the telescopic assembly 400 and the proximal end of the sleeve 300 is also more stable.

[0078] An embodiment of the present application provides an endoscope handle 100, comprising a tension adjustment mechanism for a traction rope 200 provided in any of the above embodiments.

[0079] An embodiment of the present application provides an endoscope, including an endoscope handle 100, and the endoscope handle includes the tension adjustment mechanism of the traction rope 200 provided in some of the above embodiments.

[0080] In some preferred embodiments, the first tilt angle of the tension adjustment mechanism of the traction rope 200 is greater than the second tilt angle. Rotating the first rotating member 410 is for coarse adjustment of the tension of the traction rope 200, and rotating the second rotating member 430 is for fine adjustment of the tension of the traction rope 200.

[0081] When the first rotating surface 411 and the first mating surface 421 are in contact with each other, the traction rope 200 is in a relaxed state. No matter how the second rotating member 430 is rotated, the traction rope 200 is always in a relaxed state. When the insertion part needs to be removed from the human body, the first rotating member 410 can be directly controlled to rotate, which is simple and quick to operate.

[0082] When the distance between the first rotating surface 411 and the first mating surface 421 is at the maximum, the traction rope 200 is in a tensioned state. At this time, the tension of the traction rope 200 can be finely adjusted by rotating the second rotating member 430. The distance between the first rotating surface 411 and the first mating surface 421 refers to the maximum distance between the two in the first direction. When the first rotating member 410 rotates to the maximum angle, the distance between the first rotating surface 411 and the first mating surface 421 reaches the maximum, and the axial length of the telescopic assembly 400 reaches the maximum. At this time, the handle 700 corresponding to the first rotating member 410 is moved to the extreme position.

[0083] The endoscope provided in the embodiments of the present application may be a nephroscope, or a suction endoscope, a bronchoscope, a pyeloscope, an esophagoscope, a gastroscope, a colonoscope, an otoscope, a nasal endoscope, a stomatoscope, a laryngoscope, a colposcope, a laparoscope, an arthroscope, etc.

[0084] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A traction rope tension adjustment mechanism, applied to an endoscope, characterized in that: The invention comprises a sleeve (300) and a telescopic assembly (400), wherein the sleeve (300) is used to be sleeved outside a traction rope (200), the telescopic assembly (400) is installed on a handle (100) of an endoscope, and the telescopic assembly (400) is located at the proximal end of the sleeve (300) and abuts against the sleeve (300); The telescopic assembly (400) comprises a first rotating member (410) and a first matching member (420) which are arranged axially, the first rotating member (410) and the first matching member (420) being connected, and the first rotating member (410) being capable of rotating under the action of an external force, and driving the first matching member (420) to move relative to the first rotating member (410) along a first direction, so that the axial length of the telescopic assembly (400) is extended or shortened, thereby driving the contact portion of the telescopic assembly (400) and the sleeve (300) to move closer to or farther from the distal end of the sleeve (300) along the first direction, wherein the first direction is the axial direction of the rotation axis of the first rotating member (410); One of the first rotating member (410) and the first matching member (420) that is away from the sleeve (300) is limitedly matched with the handle (100) along a first direction, and the first matching member (420) is limitedly matched with the handle (100) along a rotation direction of the first rotating member (410); The first rotating member (410) has a first rotating surface (411), the first matching member (420) has a first matching surface (421), the first rotating surface (411) is in contact with the first matching surface (421), and the first rotating surface (411) and the first matching surface (421) are both inclined relative to the cross section of the first rotating member (410), and the inclination angles are the same; The adjustment mechanism further comprises an elastic member (600), wherein the elastic member (600) is connected to one of the first rotating member (410) and the first matching member (420) which is close to the sleeve (300), so that the first rotating surface (411) and the first matching surface (421) are tightly matched.

2. A traction rope tension adjustment mechanism according to claim 1, characterized in that: The adjustment mechanism further comprises a casing (500), wherein the casing (500) is sleeved outside the casing (300), and the casing (500) is fixedly connected to the handle (100); The telescopic assembly (400) and the elastic member (600) are both installed in the casing (500); one of the first rotating member (410) and the first matching member (420) which is away from the sleeve (300) is limitedly matched with the casing (500) along a first direction; the first matching member (420) is limitedly matched with the casing (500) along a rotation direction of the first rotating member (410); one end of the elastic member (600) is connected to the casing (500), and the other end abuts against one of the first rotating member (410) and the first matching member (420) which is close to the sleeve (300).

3. A traction rope tension adjustment mechanism according to claim 2, characterized in that: The telescopic assembly (400) further comprises a second rotating member (430) and a second matching member (440) installed in the casing (500); the second rotating member (430) and the second matching member (440) are both located at the proximal end of the sleeve (300) and at the distal end of the first rotating member (410) and the first matching member (420); The elastic member (600) abuts against one of the second rotating member (430) and the second matching member (440) which is close to the sleeve (300), so as to drive the first rotating member (410), the first matching member (420), the second rotating member (430) and the second matching member (440) to be tightly matched; The second rotating member (430) can rotate under the action of an external force to drive the second matching member (440) to move along a first direction relative to the second rotating member (430), so as to extend or shorten the axial length of the telescopic assembly (400), thereby driving the contact portion between the telescopic assembly (400) and the sleeve (300) to move along the first direction, and the rotation axis of the second rotating member (430) is coaxial with the rotation axis of the first rotating member (410); The second matching member (440) is position-limitedly matched with the sleeve (500) along the circumferential direction of the second rotating member (430).

4. A traction rope tension adjustment mechanism according to claim 3, characterized in that: The second rotating member (430) has a second rotating surface (431), the second matching member (440) has a second matching surface (441), the second rotating surface (431) is in contact with the second matching surface (441), and the second rotating surface (431) and the second matching surface (441) are both arranged to be inclined relative to the cross section of the second rotating member (430), and the inclination angles are the same; The inclination angle of the first rotating surface (411) relative to the cross section of the first rotating member (410) is a first inclination angle, and the inclination angle of the second rotating surface (431) relative to the cross section of the second rotating member (430) is a second inclination angle, and the first inclination angle is not equal to the second inclination angle.

5. A traction rope tension adjustment mechanism according to claim 4, characterized in that: The friction coefficient between the first rotating member (410) and the casing (500) is a first friction coefficient, and the friction coefficient between the second rotating member (430) and the casing (500) is a second friction coefficient; When the second rotating member (430) and the first rotating member (410) are in contact with each other, the friction coefficient between the second rotating member (430) and the first rotating member (410) is a third friction coefficient, and both the first friction coefficient and the second friction coefficient are greater than the third friction coefficient.

6. A traction rope tension adjustment mechanism according to claim 1, characterized in that: The first rotating member (410) is connected to a handle (700), and the handle (700) passes through the handle (100) to extend out of the handle (100).

7. A traction rope tension adjustment mechanism according to claim 1, characterized in that: The first rotating member (410) and the first matching member (420) are both sleeved outside the traction rope (200) sleeved correspondingly to the sleeve (300).

8. An endoscope handle, characterized in that: It comprises the traction rope tension adjustment mechanism as described in any one of claims 1-7.

9. An endoscope, characterized in that: Comprising an endoscope handle (100), the endoscope handle (100) comprising the traction rope tension adjustment mechanism according to claim 4 or 5, wherein the first inclination angle is greater than the second inclination angle; When the first rotating surface (411) and the first matching surface (421) are in contact with each other, the traction rope (200) is in a relaxed state; When the distance between the first rotating surface (411) and the first matching surface (421) is at its maximum, the traction rope (200) is in a tensioned state.

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