CN116784773A

CN116784773A - Handle bending control locking mechanism, endoscope handle and endoscope system

Info

Publication number: CN116784773A
Application number: CN202210265783.0A
Authority: CN
Inventors: 董飞; 王雄伟; 朱鑫建; 黄基锐
Original assignee: Microport Urocare Jiaxing Co Ltd; Microport Urocare Shanghai Co Ltd
Current assignee: Microport Urocare Jiaxing Co Ltd; Microport Urocare Shanghai Co Ltd
Priority date: 2022-03-17
Filing date: 2022-03-17
Publication date: 2023-09-22

Abstract

The invention relates to a handle bending control locking mechanism, an endoscope handle and an endoscope system. The fixed shaft is used for being installed on the handle body. The knob assembly is movably sleeved on the fixed shaft and is used for being connected with the bending control assembly, the knob assembly is used for driving the bending control assembly to move, and the movement of the bending control assembly is used for bending the distal end of the insertion tube. The elastic piece is contacted with the knob assembly. The limiting component is sleeved on the fixed shaft, and at least part of the limiting component can move along the axial direction of the fixed shaft to extrude the knob component and the elastic component, so that the elastic component locks the knob component to rotate. The handle bending control locking mechanism can still finely adjust the insertion tube after locking, so that the insertion tube can be adjusted to a required bending state at any time in inspection.

Description

Handle bending control locking mechanism, endoscope handle and endoscope system

Technical Field

The invention relates to the technical field of medical instruments, in particular to a handle bending control locking mechanism, an endoscope handle and an endoscope system.

Background

The medical endoscope is mainly applied to surgical operation and conventional medical examination, and when in clinical use, a doctor can extend the lens of the endoscope into the body by utilizing a natural hole of the human body or making a tiny wound on the body, and then can perform in-vivo airtight operation in vitro through other surgical instruments and an imaging display system. Compared with the traditional surgical operation, the minimally invasive operation wound using the medical endoscope is small, and the postoperative recovery of a patient is quick, so that the medical endoscope has been widely used.

The medical endoscope comprises an operating handle and an insertion tube, wherein the insertion tube is used for being inserted into a body, the far end of the insertion tube is provided with an LED, a lens and other parts, and the lens at the far end of the insertion tube acquires image information in a patient and feeds back the image information to a screen connected with a host machine to perform minimally invasive surgery or medical examination. In order to better control the lens at the distal end of the insertion tube to accurately find the focus, the bending and steering of the insertion tube needs to be controlled by the operation handle, and the bending angle of the insertion tube needs to be locked and fixed after the insertion tube is bent, namely, the endoscope is controlled to be bent and locked. After the traditional endoscope is bent and locked, the bending angle of the insertion tube is locked, but in clinical use, a doctor often needs to finely adjust the bending angle of the insertion tube after the endoscope is bent and locked so as to achieve the bending state desired by the doctor.

Disclosure of Invention

Based on this, it is necessary to provide a handle bend control locking mechanism, an endoscope handle, and an endoscope system. The handle bending control locking mechanism can still adjust the bending angle of the insertion tube after locking the bending angle of the insertion tube, and the locking mechanism does not lose efficacy after adjustment.

In one aspect, the present application provides a handle bend-controlling locking mechanism comprising:

the fixed shaft is used for being installed on the handle body;

the knob assembly is movably sleeved on the fixed shaft and connected with the bending control assembly, the knob assembly is used for driving the bending control assembly to move, and the movement of the bending control assembly is used for bending the distal end of the insertion tube;

the elastic piece is arranged in contact with the knob assembly; the method comprises the steps of,

the limiting assembly is sleeved on the fixed shaft, and at least part of the limiting assembly can move along the axial direction of the fixed shaft to extrude the knob assembly and the elastic piece, so that the elastic piece locks the knob assembly to rotate.

The technical scheme of the application is further described as follows:

in one embodiment, the spacing assembly comprises:

A first limiting member; the first limiting piece is sleeved on the fixed shaft and can move along the axial direction of the fixed shaft; the method comprises the steps of,

the second limiting piece is rotatably sleeved on the fixed shaft and is in contact fit with the first limiting piece, and when the second limiting piece rotates around the fixed shaft, the second limiting piece drives the first limiting piece to move along the axial direction of the fixed shaft.

In one embodiment, a first inclined surface is arranged on one side, close to the first limiting piece, of the second limiting piece, a second inclined surface is arranged on one side, close to the second limiting piece, of the first limiting piece, the first inclined surface is in sliding fit with the second inclined surface, the second limiting piece is provided with an unlocking position and a locking position, the second limiting piece can rotate between the unlocking position and the locking position to drive the first limiting piece to move along the axial direction of the fixed shaft, and when in the unlocking position, the first limiting piece releases the first elastic piece; when the second limiting piece is at the locking position, the first limiting piece presses the first elastic piece.

In one embodiment, one of the first inclined surface and the second inclined surface is provided with a first protrusion, the other one of the first inclined surface and the second inclined surface is provided with a first groove, and the first protrusion is embedded into the first groove when the second limiting piece is in the locking position.

In one embodiment, the wheel disc assembly comprises at least one wheel disc, all the wheel discs are sleeved on the fixed shaft in sequence, and each wheel disc is connected with at least one stay wire; the knob assembly comprises at least one knob, all the knobs are sleeved on the fixed shaft in sequence along the axial direction of the fixed shaft, and the knobs are connected with the wheel discs in one-to-one correspondence.

In one embodiment, the bend control assembly includes:

the wheel disc assembly is rotatably sleeved on the fixed shaft and connected with the knob assembly, and can rotate around the fixed shaft under the drive of the rotating assembly; the method comprises the steps of,

and one end of the stay wire is connected with the wheel disc assembly, and the other end of the stay wire is used for being connected with the distal end of the insertion tube, so that when the wheel disc assembly rotates around the fixed shaft, the stay wire pulls the distal end of the insertion tube to bend.

In one embodiment, the wheel disc assembly comprises a first wheel disc and a second wheel disc, the first wheel disc and the second wheel disc are sequentially sleeved on the fixed shaft along the axial direction of the fixed shaft, and the first wheel disc and the second wheel disc are respectively connected with at least one stay wire; the knob assembly comprises a first knob and a second knob, the first knob and the second knob are sequentially sleeved on the fixed shaft along the axial direction of the fixed shaft, the first knob is connected with the first wheel disc, and the second knob is connected with the second wheel disc.

In one embodiment, the elastic member includes:

the first elastic piece is arranged between the limiting assembly and the first knob; the method comprises the steps of,

the second elastic piece is arranged between the second knob and the handle body.

In one embodiment, the handle bend-controlling locking mechanism further comprises a partition member, the partition member is arranged between the first knob and the second knob, the partition member is provided with a first through hole, the second knob is provided with an avoidance groove, the handle body is connected with a stand column, and one end of the stand column penetrates through the avoidance groove and penetrates through the first through hole.

In one embodiment, the first wheel disc and the second wheel disc each comprise a shaft sleeve and a disc body connected to one end of the shaft sleeve, the shaft sleeve of the first wheel disc is sleeved outside the fixed shaft and connected with the first knob, and the shaft sleeve of the second wheel disc is sleeved outside the shaft sleeve of the first wheel disc and connected with the second knob.

In one embodiment, each tray body is connected with at least one pull wire, and one end of each pull wire, which is far away from the insertion tube, is adjustably arranged on the tray body.

In one embodiment, the wheel disc assembly further comprises a first threaded member, the disc body is provided with a first threaded hole extending along the length direction of the stay wire and penetrating through the disc body, the first threaded member is in threaded fit with the first threaded hole, and one end of the stay wire, which is far away from the insertion tube, is penetrated in the first threaded hole and connected with the first threaded member.

In one embodiment, the first threaded piece is provided with a first threading hole and a second threading hole which are communicated with each other along the axial direction, the aperture of the first threading hole is larger than that of the second threading hole, the stay wire is arranged in the second threading hole in a penetrating mode, one end, away from the insertion tube, of the stay wire is provided with a first limiting portion, the first limiting portion is located in the first threading hole, and the diameter of the first limiting portion is larger than that of the second threading hole.

In one embodiment, the wheel disc assembly further comprises a second threaded member, the disc body is provided with a second threaded hole which forms an included angle with the length direction of the pull wire, the second threaded member is in threaded fit with the second threaded hole, one end of the pull wire, which is far away from the insertion tube, is connected with the second threaded member, and the second threaded member is used for winding up the pull wire so that the pull wire tightens in the direction far away from the insertion tube.

In one embodiment, the second threaded member is provided with a third threading hole and a fourth threading hole which are communicated and penetrate through the second threaded member in the radial direction, the aperture of the third threading hole is larger than that of the fourth threading hole, the stay wire is arranged in the fourth threading hole in a penetrating mode, one end, away from the insertion tube, of the stay wire is provided with a second limiting portion, the second limiting portion is located in the third threading hole, and the diameter of the second limiting portion is larger than that of the fourth threading hole.

In one embodiment, the wheel disc assembly further comprises a third threaded member, the disc body is provided with a third threaded hole and a fifth threaded hole, the fifth threaded hole extends along the length direction of the pull wire and penetrates through the disc body, the pull wire is arranged in the fifth threaded hole in a penetrating mode, the third threaded hole is communicated with the fifth threaded hole and is arranged in an included angle mode, the third threaded member is in threaded fit with the third threaded hole, and the third threaded member is used for crimping the pull wire at a crimping position in the fifth threaded hole or loosening the pull wire at a loosening position.

In one embodiment, the handle bending control locking mechanism further comprises a fixing cap and a fifth threaded piece, the fixing cap is provided with a second through hole, the fixing cap is sleeved on one end of the fixing shaft, which is far away from the handle body, the fixing shaft is provided with a fifth threaded hole, which is communicated with the fifth threaded hole, and the fifth threaded piece is arranged in the second through hole in a penetrating manner and is in threaded fit with the fifth threaded hole.

In one embodiment, the handle bend-controlling locking mechanism further comprises a clamping sleeve and a binding band, wherein the clamping sleeve and the binding band are arranged on the same side of the handle body at intervals, the clamping sleeve is provided with a fixing groove for fixing another endoscope, and the binding band is used for binding the other endoscope.

The application also provides an endoscope handle which comprises the handle bending control locking mechanism and a handle body.

In one embodiment, the handle body comprises a first shell and a second shell which are buckled, a mounting cavity is formed by encircling the first shell and the second shell, and the bending control assembly is positioned in the mounting cavity; the knob assembly, the elastic piece and the limiting assembly are all located outside the installation cavity.

In one embodiment, the first housing includes a first connection portion, the second housing includes a second connection portion, and the first connection portion and the second connection portion are connected by a fourth screw; one of the first connecting part and the second connecting part is provided with a second bulge, the other one of the first connecting part and the second connecting part is provided with a second groove, and the second bulge is inserted into the second groove.

In another aspect, the present application provides an endoscope system comprising the above endoscope handle and an insertion tube, wherein the proximal end of the insertion tube is connected to the endoscope handle.

In one embodiment, the insertion tube comprises an insertion tube body, a head end piece, an inner sleeve and an outer sleeve, wherein the inner sleeve is sleeved at the far end of the insertion tube body, one end of the outer sleeve is sleeved at the near end of the head end piece, the other end of the outer sleeve is sleeved at the inner sleeve, the head end piece is provided with a first instrument channel, the insertion tube body is provided with a second instrument channel communicated with the first instrument channel, the central axis of the first instrument channel and the central axis of the second instrument channel are not coaxially arranged, and a transition interval is arranged between the second instrument channel and the first instrument channel.

In one embodiment, the proximal end of the head-end piece is provided with a projection projecting in a direction towards the insertion tube body, the projection being used for guiding and securing an instrument inserted into the first instrument channel.

When the handle bending control locking mechanism needs to control bending of the insertion tube, the knob assembly can be rotated to drive the bending control assembly to move, and when the bending control assembly moves, the pull wire can pull the distal end of the insertion tube to bend and turn. After the insert tube is bent to a proper angle, when the angle of the insert tube is required to be locked, the limiting assembly can apply axial extrusion force to the elastic element after axially moving by axially moving at least part of the limiting assembly, the elastic element can be elastically deformed after being extruded, damping of the knob assembly is increased, free rotation of the knob assembly is limited when the knob assembly is rotated without external force, and rotation of the wheel disc assembly caused by restoring force of the insert tube is avoided, so that the bending angle of the insert tube is locked. And the knob assembly is limited to rotate by the friction force of the elastic piece on the knob assembly, the knob assembly is not locked, and at the moment, the knob assembly can be rotated again by applying a force larger than the friction force on the knob assembly, so that the bending angle of the insertion tube is finely adjusted until the insertion tube is adjusted to a required bending state.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application.

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of the structure of an endoscope handle according to an embodiment;

FIG. 2 is a cross-sectional view of the endoscope handle shown in FIG. 1;

FIG. 3 is an enlarged view of a portion of the endoscope handle shown in FIG. 1;

FIG. 4 is a first view of the internal structure of an endoscope handle according to an embodiment;

FIG. 5 is a second view of the internal structure of an endoscope handle according to an embodiment;

FIG. 6 is a partial exploded view of the handle bend-controlling locking mechanism shown in FIG. 1;

FIG. 7 is a schematic structural diagram of a second limiting member and a first limiting member according to an embodiment;

FIG. 8 is a schematic diagram illustrating the assembly of the second stopper and the first stopper shown in FIG. 7;

FIG. 9 is an enlarged partial view of part A shown in FIG. 2;

FIG. 10 is a schematic diagram illustrating the connection of a pull wire to a first turntable according to an embodiment;

FIG. 11 is a top view of the pull wire and first turntable shown in FIG. 10;

FIG. 12 is a schematic view of a first screw member according to an embodiment;

FIG. 13 is a schematic diagram of a pull wire according to an embodiment;

FIG. 14 is a schematic view of the connection structure of the first screw member shown in FIG. 12 and the pull wire shown in FIG. 13;

FIG. 15 is a schematic diagram showing the connection of a pull wire to a first turntable according to another embodiment;

FIG. 16 is a top view of the pull wire and first turntable shown in FIG. 15;

FIG. 17 is a schematic view of a second screw member according to an embodiment;

FIG. 18 is a schematic diagram of a pull wire according to another embodiment;

FIG. 19 is a schematic view of the connection structure of the second screw shown in FIG. 17 and the pull wire shown in FIG. 18;

FIG. 20 is a schematic diagram showing the connection of a pull wire to a first turntable according to another embodiment;

FIG. 21 is a cross-sectional view of the pull wire and first turntable shown in FIG. 15;

FIG. 22 is a top view of the pull wire and first turntable shown in FIG. 15;

FIG. 23 is a schematic diagram of a first turntable according to an embodiment;

FIG. 24 is a top view of the first turntable shown in FIG. 23;

FIG. 25 is a schematic diagram showing the connection of a pull wire to a first turntable according to yet another embodiment;

FIG. 26 is a top view of the first turntable shown in FIG. 25;

FIG. 27 is a schematic view of the structure of an endoscope handle of another embodiment;

FIG. 28 is a schematic view of the endoscope handle shown in FIG. 27 at another angle;

FIG. 29 is a schematic view of an embodiment of an insertion tube;

FIG. 30 is a cross-sectional view of the insertion tube shown in FIG. 29;

FIG. 31 is a schematic view of the insertion tube of FIG. 29 with the outer sleeve omitted;

fig. 32 is a schematic structural view of an end piece of an embodiment.

Reference numerals illustrate:

10. a handle body; 11. a first housing; 111. a first connection portion; 112. a second groove; 12. a second housing; 121. a second connecting portion; 122. a second protrusion; 13. a mounting cavity; 14. a fourth screw; 15. a cutting sleeve; 151. a fixing groove; 16. a strap; 20. an insertion tube; 201. an insertion tube body; 202. a head end piece; 203. a protruding portion; 211. a second instrument channel; 212. a first instrument channel; 22. an inner sleeve; 23. an outer sleeve; 24. a transition interval; 30. a knob assembly; 31. a first knob; 32. a second knob; 33. a locking knob; 40. a fixed shaft; 41. a fixing cap; 42. a fifth screw; 50. a wheel disc assembly; 51. a first wheel disc; 52. a second wheel disc; 53. a tray body; 531. a first threaded hole; 532. a second threaded hole; 533. a wire slot; 534. a fifth threading hole; 535. a third threaded hole; 54. a shaft sleeve; 55. a first screw; 551. a first threading hole; 552. a second threading hole; 56. a second screw; 561. a third threading hole; 562. a fourth threading hole; 57. a third screw; 61. a first limiting member; 611. a second inclined surface; 612. a first groove; 62. a second limiting piece; 621. a first inclined surface; 622. a first protrusion; 71. a first elastic member; 72. a second elastic member; 80. a pull wire; 81. a first limit part; 82. a second limit part; 91. a partition; 92. and (5) a column.

Detailed Description

In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the application, whereby the application is not limited to the specific embodiments disclosed below.

In particular, the term "proximal" in the present application refers to the end of the member that is adjacent to the operator; "distal" refers to the end of the member that is remote from the operator.

Referring to fig. 1 to 5, the handle bend-controlling locking mechanism of an embodiment includes a fixed shaft 40, a knob assembly 30, a limiting assembly, and an elastic member.

Specifically, the fixing shaft 40 is configured to be mounted on the handle body 10, where the handle body 10 includes a first housing 11 and a second housing 12 that are fastened together, and the first housing 11 and the second housing 12 enclose a mounting cavity 13. Further, the handle body is connected to the proximal end of the insertion tube 20, the insertion tube 20 is used to extend into the human body through a natural hole of the human body or a tiny wound on the body, the proximal end of the insertion tube 20 is connected to the handle body 10, and the distal end of the insertion tube 20 is provided with an LED, a lens, etc., so as to obtain image information in the human body.

Specifically, one end of the fixing shaft 40 is fixedly connected with the second housing 12, and the other end of the fixing shaft 40 passes through the first housing 11 and protrudes out of the installation cavity 13, so that the fixing shaft 40 forms a first section located inside the installation cavity 13 and a second section located outside the installation cavity 13.

The knob assembly 30 is movably sleeved on the second section of the fixed shaft 40 and is used for being connected with a bending control assembly, the knob assembly 30 is used for driving the bending control assembly to move, and the bending control assembly can enable the distal end of the insertion tube 20 to bend. Preferably, in one embodiment, the bending control assembly includes a wheel assembly 50 and a pull wire 80, wherein the wheel assembly 50 is rotatably sleeved on the first section of the fixed shaft 40 and connected to the knob assembly 30. One end of the stay wire 80 is connected with the wheel disc assembly 50, and the other end of the stay wire 80 is connected with the distal end of the insertion tube 20, so that the wheel disc assembly 50 is driven to rotate by the knob assembly 30, and the wheel disc assembly 50 can pull the stay wire 80 towards the direction far away from the insertion tube 20, so that the stay wire 80 pulls the distal end of the insertion tube 20 to bend and turn.

The limiting assembly is sleeved on the fixed shaft 40 and is positioned on one side of the knob assembly 30 away from the handle body 10, and at least part of the limiting assembly can move along the axial direction of the fixed shaft so that at least part of the limiting assembly presses or releases the knob assembly 30. Preferably, in one embodiment, the limiting assembly includes a first limiting member 61 and a second limiting member 62. Wherein the first limiting piece 61 is sleeved on the fixed shaft 40 and can move along the axial direction of the fixed shaft 40; the second limiting member 62 is rotatably sleeved on the fixed shaft 40, the second limiting member 62 is in contact with the first limiting member 61, and when the second limiting member 62 rotates around the fixed shaft, the second limiting member 62 drives the first limiting member 61 to move along the axial direction of the fixed shaft 40. Preferably, the second limiting member 62 is further connected to a locking knob 33, and the second limiting member 62 is conveniently rotated by the locking knob 33. It will be appreciated that there are many ways in which the stop assembly can be moved axially along the fixed shaft 40 to compress the knob assembly, and the stop assembly is not limited to the above embodiment, for example, in another embodiment, the stop assembly may be a nut, and the nut is screwed with the fixed shaft, so that by rotating the nut, the nut can be moved axially along the fixed shaft 40 to compress the knob assembly.

The elastic member is disposed in contact with the knob assembly, so that when the limiting assembly moves along the axial direction of the fixing shaft 40 to press the knob assembly 30 and the elastic member, the elastic member is deformed to generate a friction force to the knob assembly 30, and the knob assembly 30 can be locked by the friction force to prevent the knob assembly from rotating. Preferably, in one embodiment, the number of the elastic members is two, namely the first elastic member 71 and the second elastic member 72, wherein the first elastic member 71 is disposed between the first limiting member 61 and the knob assembly 30. The second elastic member 72 is disposed between the knob assembly 30 and the handle body 10, thereby being further enlarged. Preferably, the materials of the first elastic member 71 and the second elastic member 72 are elastic materials, such as rubber rings or rubber pads. It will be appreciated that the number of elastic members is not limited to the two described above, and in other embodiments, the number of elastic members may be one or more as desired.

Specifically, when the handle bending control locking mechanism needs to control the bending of the insertion tube 20, the rotary knob assembly 30 can drive the rotary disc assembly 50 to rotate, and the rotary disc assembly 50 can pull the pull wire 80 away from the insertion tube 20 during rotation, so that the pull wire 80 pulls the distal end of the insertion tube 20 to bend and turn. When the insertion tube 20 is bent to a proper angle and the angle of the insertion tube 20 needs to be locked, the second limiting piece 62 is rotated by the locking knob 33, the second limiting piece 62 can drive the first limiting piece 61 to move along the axial direction of the fixed shaft 40, the first limiting piece 61 can apply an axial extrusion force to the first elastic piece 71 after moving along the axial direction, and the first elastic piece 71 can apply pressure to the knob assembly 30 along the axial direction after being extruded, so that the knob assembly 30 moves along the axial direction and then the second elastic piece 72 is extruded. The first elastic member 71 and the second elastic member 72 are elastically deformed after being pressed, so that damping of the knob assembly 30 is increased, free rotation of the knob assembly 30 is limited when the knob assembly 30 is rotated without external force, and further, the problem of rotation of the wheel disc assembly 50 due to restoring force of the insertion tube 20 is avoided, so that the bending angle of the insertion tube 20 is locked. The friction force between the first elastic member 71 and the second elastic member 72 to limit the rotation of the knob assembly 30, so that the knob assembly 30 is not locked, and at this time, the knob assembly 30 can be rotated again by applying a force greater than the friction force to the knob assembly 30, thereby achieving fine adjustment of the bending angle of the insertion tube 20 until the insertion tube 20 is adjusted to a desired bending state.

Further, the wheel disc assembly 50 comprises at least one wheel disc, all wheel discs are sleeved on the fixed shaft 40 in sequence along the axial direction of the fixed shaft 40, and each wheel disc is connected with at least one pull wire 80; the knob assembly 30 includes at least one knob, all of which are sequentially sleeved on the fixed shaft 40 in the axial direction of the fixed shaft 40, and the knobs are connected with the wheel discs in one-to-one correspondence, thereby realizing the multi-directional bending of the insertion tube 20.

Specifically, referring to fig. 3 and 6, in the present embodiment, the wheel disc assembly 50 includes a first wheel disc 51 and a second wheel disc 52, the first wheel disc 51 and the second wheel disc 52 are sequentially sleeved on the fixed shaft 40 along the axial direction of the fixed shaft 40, and at least one wire 80 is connected to each of the first wheel disc 51 and the second wheel disc 52. Correspondingly, the knob assembly 30 comprises a first knob 31 and a second knob 32, the first knob 31 and the second knob 32 are sequentially sleeved on the fixed shaft 40 along the axial direction of the fixed shaft 40, the first knob 31 is connected with the first wheel disc 51, the second knob 32 is connected with the second wheel disc 52, and preferably, the first wheel disc 51 is connected with two stay wires 80, so that the first wheel disc 51 can be driven to rotate in corresponding directions by rotating the first knob 31 in different directions, and further, the insertion tube 20 is controlled to bend in two different directions, such as left and right directions. Similarly, the second wheel 52 is connected with two pull wires 80, so that by rotating the second knob 32 in different directions, the second wheel 52 can be driven to rotate in different directions, thereby controlling the insertion tube 20 to bend in two different directions, such as up and down directions.

Further, the first elastic member 71 is disposed between the first stopper 61 and the first knob 31, and the second elastic member 72 is disposed between the second knob 32 and the handle body 10. Thus, the second limiting member 62 is rotated by the locking knob 33, the second limiting member 62 can drive the first limiting member 61 to move along the axial direction of the fixed shaft 40, the first limiting member 61 can apply an axial extrusion force to the first elastic member 71 after moving axially, the first elastic member 71 can be elastically deformed after being extruded, and damping to the first knob 31 is increased, so that free rotation of the first knob 31 is limited. Meanwhile, the first elastic member 71 can press the first knob 31 in the axial direction after being pressed, so that the first knob 31 moves in the axial direction and further applies the pressing force in the axial direction to the second knob 32. The second knob 32 is axially close to the handle body 10 after being pressed by the axial pressing force, so that the second elastic member 72 is pressed, and the second elastic member 72 is elastically deformed after being pressed, so that damping on the second knob 32 is increased, and free rotation of the second knob 32 is limited. When the first knob 31 and the second knob 32 are rotated without external force, the first knob 31 and the second knob 32 are locked, so that the first knob 31 and the second knob 32 are prevented from rotating due to the restoring force of the insertion tube 20, and the bending angle of the insertion tube 20 is locked.

Further, in order to avoid the problem that when the first knob 31 and the second knob 32 are turned to finely adjust the bending angle of the insertion tube 20 after being locked, the first knob 31 or the second knob 32 is influenced by the contact friction force, the handle bending control locking mechanism according to the embodiment of the application further comprises a partition 91, the partition 91 is arranged between the first knob 31 and the second knob 32, the partition 91 is provided with a first through hole, the second knob 32 is provided with a avoidance groove, the handle body 10 is connected with a stand column 92, one end of the stand column 92 passes through the avoidance groove and penetrates through the first through hole, so that the first knob 31 and the second knob 32 are separated by the partition 91, the first knob 31 and the second knob 32 are prevented from being in direct contact, and meanwhile, the stand column 92 penetrates through the connecting hole of the partition 91, so that the rotation of the partition 91 is limited while the axial movement of the partition 91 along the fixed shaft 40 is not influenced, the problem that the first knob 31 and the second knob 32 are influenced by the contact friction force is prevented, and the bending angle of the insertion tube 20 can be adjusted more accurately. Preferably, the relief groove is an arcuate groove to avoid the post 92 from affecting the rotation of the second knob 32.

With continued reference to fig. 7 and 8, further, a first inclined surface 621 is disposed on a side of the second limiting member 62, which is close to the first limiting member 61, and a second inclined surface 611 is disposed on a side of the first limiting member 61, which is close to the second limiting member 62, the first inclined surface 621 is slidably engaged with the second inclined surface 611, the second limiting member 62 has an unlocked position and a locked position, and the second limiting member 62 can rotate between the unlocked position and the locked position, specifically, during the process of rotating the second limiting member 62 from the unlocked position to the locked position, the first inclined surface 621 is slidably engaged with the second inclined surface 611, so as to drive the first limiting member 61 to move along the axial direction, and further, the first limiting member 61 compresses the first elastic member 71. When the second stopper 62 rotates back to the unlocking position, the first stopper 61 releases the first elastic member 71.

Further, the first inclined surface 621 is provided with a first protrusion 622, the second inclined surface 611 is provided with a first groove 612, when the second limiting member 62 is in the locking position, the first protrusion 622 is embedded into the first groove 612, so that the second limiting member 62 is locked in the locking position, the second limiting member 62 is prevented from rotating, meanwhile, the first protrusion 622 collides with the groove wall of the first groove 612 when entering the first groove 612, so that a crisp sound is generated, and an operator is reminded that the second limiting member 62 is rotated to the locking position, and the rotating overstep is avoided. Of course, it is worth noting that in another embodiment. The first groove 612 may be formed on the first inclined surface 621, and the first protrusion 622 may be formed on the second inclined surface 611, so that the second limiting member 62 is locked at the locking position and the operator is reminded to rotate the second limiting member 62 in place, which is not described herein. Preferably, the first protrusion 622 is a circular arc protrusion, and correspondingly, the first groove 612 is a circular arc groove, so that the first protrusion 622 is easier to enter or exit the first groove 612.

Referring to fig. 3, in order to avoid the second limiting member 62 from being separated from the fixed shaft 40, in one embodiment, the handle bending locking mechanism further includes a fixing cap 41 and a fifth threaded member 42, wherein the fixing cap 41 is provided with a second through hole, the fixing cap 41 is sleeved at one end of the fixed shaft 40 away from the handle body 10, one end of the fixed shaft 40 away from the handle body 10 is provided with a fifth threaded hole, the second through hole is communicated with the fifth threaded hole, and the fifth threaded member 42 is threaded in the second through hole and is in threaded fit with the fifth threaded hole. The fixing cap 41 is used for limiting the second limiting piece 62 to deviate from the fixed shaft 40, and the fixing cap 41 is fixed through the fifth threaded piece 42, so that the fixing cap 41 is prevented from being driven when the rotary fixing piece rotates, loosening of the fixing cap 41 is avoided, and effectiveness of the handle bending control locking mechanism on the bending control locking function of the insertion tube 20 is further guaranteed.

In the present application, the distal end of the insertion tube 20 is controlled to bend by rotating the first wheel 51 or the second wheel 52 to pull the pull wire 80. Typically, the material of the pull wire 80 is mostly wire or other flexible wire. After the bending is controlled for many times, the stay wire 80 can be extended and become longer, so that the stay wire 80 becomes loose, and further, the phenomenon of idle stroke of the stay wire 80 inevitably occurs, namely, after a doctor is required to rotate the first knob 31 or the second knob 32 to a certain angle, the insertion tube 20 can start to bend, so that the maximum bending angle of the insertion tube 20 often cannot reach the expectation, the bending angle of the insertion tube 20 cannot influence the doctor to find a focus, even the focus is omitted, meanwhile, operations such as lithotripsy, biopsy and the like of the doctor are also influenced, the operation time is prolonged, and the operation risk of a patient is increased.

Based on the above-mentioned problems, the position of one end of the stay wire of the present application is adjustably disposed on the wheel disc assembly 50, so that the tightness of the stay wire 80 can be adjusted by adjusting the position of the stay wire relative to the wheel disc assembly, thereby solving the idle stroke problem of the stay wire 80. Specifically, the first wheel disc 51 and the second wheel disc 52 each include a shaft sleeve 54 and a disc 53 connected to one end of the shaft sleeve 54, the shaft sleeve 54 of the first wheel disc 51 is sleeved outside the fixed shaft 40 and connected to the first knob 31, and the shaft sleeve 54 of the second wheel disc 52 is sleeved outside the shaft sleeve 54 of the first wheel disc 51 and connected to the second knob 32. Further, the position of the end of the pull wire 80 away from the insertion tube 20 is adjustably disposed on the tray 53, so that the pull wire 80 can be tightened in a direction away from the insertion tube 20, and when the pull wire 80 is stretched and lengthened after long-term use, and further the pull wire 80 becomes loose, the pull wire 80 is further tightened by adjusting the position of the end of the pull wire 80 away from the insertion tube 20 on the tray 53, so that the pull wire 80 is re-tightened, and further, the idle stroke phenomenon of the pull wire 80 is avoided.

Referring to fig. 10 and 11, in one embodiment, the wheel disc assembly 50 further includes a first screw member 55, the disc 53 is provided with a first screw hole 531 extending along the length direction of the pull wire 80 and penetrating through the disc 53, the first screw member 55 is in screw fit with the first screw hole 531, one end of the pull wire 80, which is far away from the insertion tube 20, is penetrated in the first screw hole 531 and connected with the first screw member 55, and when the pull wire 80 is extended and lengthened after long-term use, which causes the pull wire 80 to become loose, the pull wire 80 is tightened in a direction away from the insertion tube 20 by rotating the first screw member 55, so that the pull wire 80 is re-tightened, thereby avoiding the idle running of the pull wire 80.

Further, referring to fig. 12 to 14, in the present embodiment, the first threaded member 55 is provided with a first threaded hole 551 and a second threaded hole 552 which are communicated with each other in the axial direction, the aperture of the first threaded hole 551 is larger than that of the second threaded hole 552, the pull wire 80 is threaded in the second threaded hole 552, the end of the pull wire 80, which is far away from the insertion tube 20, is provided with a first limiting portion 81, the first limiting portion 81 is located in the first threaded hole 551, and the diameter of the first limiting portion 81 is larger than that of the second threaded hole 552, so that the end of the pull wire 80, which is far away from the insertion tube 20, and the first threaded member 55 can move in a direction away from the insertion tube 20 synchronously, thereby tightening the pull wire 80. It should be noted that, in other embodiments, the end of the pull wire 80 away from the insertion tube 20 may be directly bonded or adhesively fixed to the first screw member 55.

Preferably, in the present embodiment, each tray 53 is provided with two stay wires 80, correspondingly, each tray 53 is provided with two first threaded holes 531, each first threaded hole 531 is provided with one first threaded member 55, and the two stay wires 80 are connected to the two first threaded members 55 in a one-to-one correspondence manner, so that four-way bending control of the insertion tube 20 is realized through the four stay wires 80.

Referring to fig. 15 and 16, in another embodiment, the wheel disc assembly 50 further includes a second threaded member 56, and the disc 53 is provided with a second threaded hole 532 that forms an angle with the length direction of the stay 80, and preferably, the axis direction of the second threaded hole 532 is perpendicular to the length direction of the stay 80. The second threaded member 56 is threadedly engaged with the second threaded bore 532, and an end of the pull wire 80 remote from the insertion tube 20 is coupled to the second threaded member 56, the second threaded member 56 being configured to retract the pull wire 80 such that the pull wire 80 is tightened in a direction away from the insertion tube 20. Specifically, when the pull wire 80 is stretched and lengthened and the pull wire 80 is loosened due to long-term use, the pull wire 80 can be gradually wound on the second screw member 56 by rotating the second screw member 56, so that the pull wire 80 is tightened in a direction away from the insertion tube 20, the pull wire 80 is re-tightened, and the idle stroke of the pull wire 80 is avoided.

Further, referring to fig. 17 to 19, the second screw 56 is provided with a third threading hole 561 and a fourth threading hole 562 which are communicated and penetrate through the second screw 56 in a radial direction, the aperture of the third threading hole 561 is larger than that of the fourth threading hole 562, the pull wire 80 is threaded in the fourth threading hole 562, one end of the pull wire 80, which is far away from the insertion tube 20, is provided with a second limiting portion 82, the second limiting portion 82 is positioned in the third threading hole 561, and the diameter of the second limiting portion 82 is larger than that of the fourth threading hole 562. So that the end of the pull wire 80 remote from the insertion tube 20 is fixedly connected with the second screw member 56, and thus the pull wire 80 can be wound on the second screw member 56 when the second screw member 56 is rotated, thereby tightening the pull wire 80. It should be noted that, in other embodiments, the end of the pull wire 80 away from the insertion tube 20 may be directly bonded or adhesively fixed to the second screw 56.

Further, referring to fig. 15, the disc 53 is further provided with a wire groove 533 penetrating the disc 53 in a radial direction, and an end of the pull wire 80, which is far away from the insertion tube 20, is penetrated in the wire groove 533 and connected to the second screw 56, so that interference between the pull wire 80 and the disc 53 when the second screw 56 winds up the pull wire 80 is avoided.

Preferably, in the present embodiment, each disc 53 is provided with two stay wires 80, correspondingly, each disc 53 is provided with two second threaded holes 532, each second threaded hole 532 is provided with one second threaded member 56, and the two stay wires 80 are connected to the two second threaded members 56 in a one-to-one correspondence, so that four-way bending control of the insertion tube 20 is realized through the four stay wires 80.

Referring to fig. 20 to 24, in still another embodiment, the wheel disc assembly 50 includes a third screw 57, the disc 53 is provided with a third threaded hole 535 and a fifth threaded hole 534, the fifth threaded hole 534 extends along the length direction of the pull wire 80 and penetrates the disc 53, the pull wire 80 is threaded into the fifth threaded hole 534, the third threaded hole 535 is connected with the fifth threaded hole 534 and is disposed at an included angle, and preferably, the third threaded hole 535 is disposed perpendicular to the fifth threaded hole 534. The third screw 57 is screw-engaged with the third screw hole 535, specifically, the third screw 57 is rotated to move the third screw 57 between a crimping position, in which the third screw 57 can crimp the wire 80 in the fifth wire passing hole 534, and a releasing position; in the release position, the third screw 57 releases the pull wire 80. Specifically, when the handle bending control locking mechanism works normally, the third screw member 57 is in the compression joint position, and at this time, one end of the third screw member 57 compresses the pull wire 80, so that the pull wire 80 can be pulled on the rotating disc 53, and further the insertion tube 20 is subjected to bending control. When the pull wire 80 is stretched and lengthened and becomes loose after long-term use, the third screw member 57 is unscrewed, so that the third screw member 57 enters the release position, the third screw member 57 releases the pull wire 80, at this time, the pull wire 80 can be re-tightened by pulling the pull wire 80 in a direction away from the insertion tube 20, and the third screw member 57 is screwed again, so that the third screw member 57 enters the crimping position again to press the pull wire 80, thereby keeping the pull wire 80 tight and avoiding the idle stroke of the pull wire 80.

Preferably, in the present embodiment, each tray 53 is provided with two pull wires 80, and correspondingly, each tray 53 is provided with two third threaded holes 535 and two fifth threaded holes 534, each third threaded hole is provided with one third threaded member 57, and the two pull wires 80 are connected to the two third threaded members 57 in a one-to-one correspondence, so that four-way bending control of the insertion tube 20 is achieved through the four pull wires 80.

Referring to fig. 25 and 26, in another embodiment, two fifth threading holes 534 are communicated with each other, and a plurality of third threaded holes 535 are arranged on the tray 53 at intervals along the track of the fifth threading holes 534, and when the wire 80 is pulled straight away from the insertion tube 20, different portions of the wire 80 can be compressed by threading the third screw 57 into different third threaded holes 535.

Further, the handle bend-controlling locking mechanism of the embodiment shown in fig. 21 can achieve the adjustment of the tightness of the pull wire 80 without the need for making an opening in the third screw member 57, using standard screw members such as standard bolts, etc., and has simpler process and lower cost.

Further, referring to fig. 2 and 9, the first housing 11 includes a first connection portion 111, and the second housing 12 includes a second connection portion 121, and the first connection portion 111 and the second connection portion 121 are connected by a fourth screw 14, thereby achieving connection fixation of the first housing 11 and the second housing 12. Further, the first connecting portion 111 is provided with a second protrusion 122, the second connecting portion 121 is provided with a second groove 112, and the second protrusion 122 is inserted into the second groove 112, so that the matching surfaces of the first connecting portion 111 and the second connecting portion 121, which are matched with each other, form a step structure, and the stay wire 80 is prevented from entering the matching gap between the first connecting portion 111 and the second connecting portion 121, and further the stay wire 80 is prevented from being broken due to the matching friction between the first connecting portion 111 and the second connecting portion 121. Of course, in another embodiment, the second groove 112 may also be disposed on the first connecting portion 111, and the second protrusion 122 may also be disposed on the second connecting portion 121, which also serves to avoid the breakage of the pull wire 80, which is not described herein.

Further, referring to fig. 27 to 28, the handle bend control locking mechanism further includes a ferrule 15 and a strap 16, the ferrule 15 being provided to the handle body 10 at a distance from the strap 16, the ferrule 15 being provided with a fixing groove 151 for fixing another endoscope, the strap 16 being used for tying another endoscope. Specifically, many operations require two kinds of endoscopes to be used together in a matched mode, the two kinds of endoscopes can be respectively called a son endoscope and a mother endoscope, and in order to facilitate operation of doctors and reduce operation time, the son endoscope and the mother endoscope are often required to be fixed together, so that the doctors can conveniently use the endoscope in a matched mode. The handle bending control locking mechanism of the embodiment is characterized in that the clamping sleeve 15 and the binding belt 16 are arranged on the handle body 10 of the child mirror at intervals, the fixing groove 151 of the clamping sleeve 15 is clamped with the handle body of the parent mirror, and the handle body of the parent mirror is bound by the binding belt 16, so that the parent mirror is provided with two fixing points, the parent mirror is firmly fixed on the handle body 10 of the child mirror, and the parent mirror is prevented from shaking when the child mirror and the parent mirror are matched for use. Preferably, the clamping sleeve 15 and the binding band 16 are arranged on the same side of the handle body 10, the clamping sleeve 15 is close to the distal end of the handle body 10, the binding band 16 is close to the proximal end of the handle body 10, when the female scope is connected, the clamping sleeve 15 is clamped with the tail end (close to one end of the insertion tube) of the handle body of the female scope, and the binding band 16 is bound with the middle upper part of the handle body of the female scope.

The present application also provides in another aspect an endoscope handle comprising the handle bend control locking mechanism of any of the embodiments described above. The specific structure of the handle bending control locking mechanism and the beneficial effects brought by the handle bending control locking mechanism can be described in the foregoing, and the details are omitted here.

The application also provides an endoscope system which comprises the endoscope handle and an insertion tube, wherein the proximal end of the insertion tube is connected with the endoscope handle, and the endoscope handle can be used for controlling the bending of the insertion tube or realizing other functions of inspection.

Further, referring to fig. 29 to 30, in the present embodiment, the insertion tube 20 includes an insertion tube body 201, a head end piece 202, an inner sleeve 22 and an outer sleeve 23, the inner sleeve 22 is sleeved on the distal end of the insertion tube body 201, one end of the outer sleeve 23 is sleeved on the proximal end of the head end piece 202, the other end of the outer sleeve 23 is sleeved on the inner sleeve 22, the head end piece 202 is provided with a first instrument channel 212, the insertion tube body 201 is provided with a second instrument channel 212 in communication with the first instrument channel 212, and both the first instrument channel 212 and the second instrument channel 211 are used for threading instruments. Further, the central axis of the first instrument channel 212 and the central axis of the second instrument channel 211 are not coaxially arranged, so that the head end layout of the insertion tube 20 is more reasonable, and the outlet of the first instrument channel 212 deviates from the head end center, thereby providing more space for the camera, the light source and other elements. In order to avoid bending fracture when an instrument penetrates into the first instrument channel 212 from the second instrument channel 211, a transition interval 24 is arranged between the outlet of the second instrument channel 211 and the inlet of the first instrument channel 212, and when the instrument penetrates into the first instrument channel 212 from the second instrument channel 211, a certain transition space can be reserved for the instrument by the transition interval 24, so that the problem that the instrument cannot enter the first instrument channel 212 due to the fact that the first instrument channel 212 and the second instrument channel 211 are not coaxial and needs to be bent at a large angle is avoided, and further the breakage damage of the instrument is avoided.

Further, referring to fig. 31 and 32, the proximal end of the head-end member 202 is provided with a projection 203 projecting toward the direction approaching the insertion tube body, and the projection 203 is used for guiding and fixing the instrument inserted into the first instrument channel 212, so that the instrument can be accurately inserted into the first instrument channel 212 after coming out of the second instrument channel 211, thereby avoiding the insertion of the instrument into other positions such as the gap between the inner sleeve 22 and the insertion tube 20. Preferably, the proximal end of the handle body 10 is provided with at least two bosses, which are axially spaced along the proximal end of the handle body 10, to enhance guiding and securing of the instrument.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Claims

1. A handle bend-controlling locking mechanism, comprising:

the fixed shaft is used for being installed on the handle body;

the knob assembly is movably sleeved on the fixed shaft and is used for being connected with the bending control assembly, the knob assembly is used for driving the bending control assembly to move, and the movement of the bending control assembly is used for bending the distal end of the insertion tube;

2. The handle bend-controlling locking mechanism of claim 1, wherein the limit assembly comprises:

3. The handle bend-controlling locking mechanism according to claim 2, wherein a first inclined surface is arranged on one side of the second limiting piece, which is close to the first limiting piece, and a second inclined surface is arranged on one side of the first limiting piece, which is close to the second limiting piece, and the first inclined surface is in sliding fit with the second inclined surface; the second limiting piece can rotate between an unlocking position and a locking position to drive the first limiting piece to move along the axial direction of the fixed shaft, and when the second limiting piece is in the unlocking position, the first limiting piece loosens the knob assembly and the elastic piece; when the second limiting piece is at the locking position, the first limiting piece presses the knob assembly and the elastic piece tightly.

4. A handle bend-controlling locking mechanism according to claim 3, wherein one of the first inclined surface and the second inclined surface is provided with a first projection, the other one is provided with a first recess, and the first projection is embedded in the first recess when the second stopper is in the locked position.

5. The handle bend-controlling locking mechanism of claim 3, wherein the bend-controlling assembly comprises:

6. The handle bend-controlling locking mechanism according to claim 5, wherein the wheel disc assembly comprises a first wheel disc and a second wheel disc, the first wheel disc and the second wheel disc are sequentially sleeved on the fixed shaft along the axial direction of the fixed shaft, and at least one stay wire is connected to each of the first wheel disc and the second wheel disc; the knob assembly comprises a first knob and a second knob, the first knob and the second knob are sequentially sleeved on the fixed shaft along the axial direction of the fixed shaft, the first knob is connected with the first wheel disc, and the second knob is connected with the second wheel disc.

7. The handle bend-controlling locking mechanism according to claim 6, wherein the resilient member comprises:

8. The handle bend-controlling locking mechanism according to claim 6, further comprising a spacer disposed between the first knob and the second knob, the spacer being provided with a first through hole, the second knob being provided with a relief groove, the handle body being connected with a post, one end of the post passing through the relief groove and being disposed in the first through hole.

9. The handle bend-controlling locking mechanism according to claim 6, wherein the first wheel disc and the second wheel disc each comprise a shaft sleeve and a disc body connected to one end of the shaft sleeve, the shaft sleeve of the first wheel disc is sleeved outside the fixed shaft and connected with the first knob, and the shaft sleeve of the second wheel disc is sleeved outside the shaft sleeve of the first wheel disc and connected with the second knob.

10. The handle bend-controlling locking mechanism according to claim 9, wherein each of the discs is connected with at least one of the pull wires, and wherein an end of each of the pull wires remote from the insertion tube is adjustably positioned on the disc.

11. The handle bend-controlling locking mechanism according to claim 10, wherein the wheel disc assembly further comprises a first threaded member, the disc body is provided with a first threaded hole extending in the length direction of the pull wire and penetrating through the disc body, the first threaded member is in threaded engagement with the first threaded hole, and one end of the pull wire, which is far away from the insertion tube, is inserted into the first threaded hole and connected with the first threaded member.

12. The handle bend-controlling locking mechanism according to claim 11, wherein the first threaded member is provided with a first threading hole and a second threading hole which are communicated with each other in the axial direction, the aperture of the first threading hole is larger than that of the second threading hole, the stay wire is arranged in the second threading hole in a penetrating manner, one end, away from the insertion tube, of the stay wire is provided with a first limiting portion, the first limiting portion is located in the first threading hole, and the diameter of the first limiting portion is larger than that of the second threading hole.

13. The handle bend-controlling locking mechanism according to claim 10, wherein the wheel disc assembly further comprises a second threaded member, the wheel disc body is provided with the second threaded hole forming an included angle with the length direction of the pull wire, the second threaded member is in threaded fit with the second threaded hole, one end of the pull wire away from the insertion tube is connected with the second threaded member, and the second threaded member is used for winding up the pull wire to tighten the pull wire away from the insertion tube.

14. The handle bend-controlling locking mechanism according to claim 13, wherein the second threaded member is provided with a third threaded hole and a fourth threaded hole which are communicated and penetrate through the second threaded member in the radial direction, the aperture of the third threaded hole is larger than that of the fourth threaded hole, the stay wire is arranged in the fourth threaded hole in a penetrating manner, one end of the stay wire, which is far away from the insertion tube, is provided with a second limiting portion, the second limiting portion is located in the third threaded hole, and the diameter of the second limiting portion is larger than that of the fourth threaded hole.

15. The handle bend-controlling locking mechanism according to claim 10, wherein the wheel disc assembly further comprises a third threaded member, the disc body is provided with a third threaded hole and a fifth threaded hole, the fifth threaded hole extends along the length direction of the pull wire and penetrates through the disc body, the pull wire is arranged in the fifth threaded hole in a penetrating mode, the third threaded hole is communicated with the fifth threaded hole and is arranged in an included angle, the third threaded member is in threaded fit with the third threaded hole, and the third threaded member is used for crimping the pull wire in the fifth threaded hole or loosening the pull wire.

16. The handle bend-controlling locking mechanism according to claim 1, further comprising a fixing cap and a fifth screw member, wherein the fixing cap is provided with a second through hole, the fixing cap is sleeved on one end of the fixing shaft far away from the handle body, the end of the fixing shaft far away from the handle body is provided with a fifth screw hole, the second through hole is communicated with the fifth screw hole, and the fifth screw member is arranged in the second through hole in a penetrating manner and is in threaded fit with the fifth screw hole.

17. An endoscope handle comprising a handle bend-controlling locking mechanism according to any one of claims 1-16, and a handle body.

18. The endoscope handle of claim 17, wherein the handle body comprises a first housing and a second housing that snap-fit together, the first housing and the second housing enclosing to form a mounting cavity, the bend control assembly being located within the mounting cavity; the knob assembly, the elastic piece and the limiting assembly are all located outside the installation cavity.

19. The endoscope handle of claim 18, wherein the first housing comprises a first connection portion and the second housing comprises a second connection portion, the first connection portion and the second connection portion being connected by a fourth screw; one of the first connecting part and the second connecting part is provided with a second bulge, the other one of the first connecting part and the second connecting part is provided with a second groove, and the second bulge is inserted into the second groove.

20. An endoscope system comprising the endoscope handle of any of claims 17-19 and an insertion tube, the proximal end of the insertion tube being connected to the endoscope handle.

21. The endoscope system of claim 20, wherein the insertion tube comprises an insertion tube body, a head end piece, an inner sleeve and an outer sleeve, the inner sleeve is sleeved at a distal end of the insertion tube body, one end of the outer sleeve is sleeved at a proximal end of the head end piece, the other end of the outer sleeve is sleeved at the inner sleeve, the head end piece is provided with a first instrument channel, the insertion tube body is provided with a second instrument channel communicated with the first instrument channel, a central axis of the first instrument channel is not coaxial with a central axis of the second instrument channel, and a transition interval is arranged between the second instrument channel and the first instrument channel.

22. The endoscope system according to claim 21, wherein the proximal end of the head-end member is provided with a projection projecting in a direction approaching the insertion tube body, the projection being for guiding and fixing an instrument inserted into the first instrument channel.