Handle bending control locking mechanism, endoscope handle and endoscope system

Abstract

The present invention relates to a handle bending control and locking mechanism, an endoscope handle and an endoscope system. The handle bending control and locking mechanism includes a fixed shaft, a knob assembly, a limit assembly and an elastic member. The fixed shaft is used to be installed on the handle body. The knob assembly can be movably mounted on the fixed shaft and is used to connect with the bending control assembly. The knob assembly is used to drive the bending control assembly to move, and the movement of the bending control assembly is used to bend the distal end of the insertion tube. The elastic member is arranged in contact with the knob assembly. The limit assembly is mounted on the fixed shaft, and at least part of the limit assembly can move along the axial direction of the fixed shaft to squeeze the knob assembly and the elastic member, so that the elastic member locks the knob assembly from rotating. The above-mentioned handle bending control and locking mechanism can still fine-tune the insertion tube after locking, so that the insertion tube can be adjusted to the required bending state at any time during the inspection.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a handle bending control and locking mechanism, an endoscope handle, and an endoscope system. Background Art

[0002] Medical endoscopes are primarily used in surgical procedures and routine medical examinations. During clinical use, doctors use natural human orifices or tiny incisions to insert the endoscope's lens into the body. Using other surgical instruments and a camera display system, they can perform closed surgical procedures inside the body from outside the body. Compared to traditional surgical procedures, minimally invasive procedures using medical endoscopes require smaller incisions and allow patients to recover faster after surgery. Consequently, medical endoscopes have become widely used.

[0003] A medical endoscope includes an operating handle and an insertion tube, wherein the insertion tube is used to be inserted into the body. The distal end of the insertion tube has components such as an LED and a lens. The lens at the distal end of the insertion tube acquires image information from the patient's body and feeds it back to a screen connected to the host computer so that minimally invasive surgery or medical examinations can be performed. In order to better control the lens at the distal end of the insertion tube to accurately find the lesion, it is necessary to control the bending and turning of the insertion tube through the operating handle and to lock and fix the bending angle of the insertion tube after the insertion tube is bent, that is, to perform a bending control lock on the endoscope. After the bending control lock is applied to a traditional endoscope, the bending angle of the insertion tube is locked. However, in clinical use, after the doctor has locked the bending control of the endoscope, he often needs to make subtle adjustments to the bending angle of the insertion tube to achieve the bending state the doctor wants. Summary of the Invention

[0004] Based on this, it is necessary to provide a handle bending control and locking mechanism, an endoscope handle, and an endoscope system. The handle bending control and locking mechanism can still adjust the bending angle of the insertion tube after locking the bending angle of the insertion tube, and the locking does not fail after the adjustment.

[0005] In one aspect, the present application provides a handle bending control and locking mechanism, comprising:

[0006] A fixed shaft, the fixed shaft being used to be mounted on the handle body;

[0007] a knob assembly, the knob assembly being movably mounted on the fixed shaft and connected to the bending control assembly, the knob assembly being used to drive the bending control assembly to move, and the movement of the bending control assembly being used to bend the distal end of the insertion tube;

[0008] an elastic member, the elastic member being arranged in contact with the knob assembly; and

[0009] A limiting assembly is sleeved on the fixed shaft, and at least a portion of the limiting assembly can move along the axial direction of the fixed shaft to squeeze the knob assembly and the elastic member, so that the elastic member locks the knob assembly from rotating.

[0010] The technical solution of this application is further described below:

[0011] In one embodiment, the limiting assembly includes:

[0012] a first limiting member; the first limiting member is sleeved on the fixed shaft and can move along the axial direction of the fixed shaft; and

[0013] The second limiting member is rotatably mounted on the fixed shaft, and the second limiting member is in contact with and cooperates with the first limiting member. When the second limiting member rotates around the fixed shaft, the second limiting member drives the first limiting member to move axially along the fixed shaft.

[0014] In one embodiment, the second limit member is provided with a first inclined surface on a side close to the first limit member, and the first limit member is provided with a second inclined surface on a side close to the second limit member, the first inclined surface and the second inclined surface are slidably matched, the second limit member has an unlocked position and a locked position, the second limit member can rotate between the unlocked position and the locked position to drive the first limit member to move axially along the fixed axis, when the second limit member is in the unlocked position, the first limit member releases the first elastic member; when the second limit member is in the locked position, the first limit member presses the first elastic member.

[0015] In one embodiment, one of the first inclined surface and the second inclined surface is provided with a first protrusion, and the other one is provided with a first groove. When the second limiting member is in the locking position, the first protrusion is embedded in the first groove.

[0016] In one embodiment, the wheel assembly includes at least one wheel, all of which are sequentially mounted on the fixed shaft, and each of the wheel is connected to at least one pull wire; the knob assembly includes at least one knob, all of which are sequentially mounted on the fixed shaft along the axial direction of the fixed shaft, and the knobs are connected to the wheel in a one-to-one correspondence.

[0017] In one embodiment, the bending control assembly includes:

[0018] a wheel assembly, the wheel assembly being rotatably sleeved on the fixed shaft and connected to the knob assembly, the wheel assembly being capable of rotating around the fixed shaft driven by the rotating assembly; and

[0019] A pull wire, one end of which is connected to the wheel assembly, and the other end of which is used to connect to the distal end of the insertion tube, so that when the wheel assembly rotates around the fixed axis, the pull wire pulls the distal end of the insertion tube to bend.

[0020] In one embodiment, the wheel assembly includes a first wheel and a second wheel, and the first wheel and the second wheel are sequentially mounted on the fixed shaft along the axial direction of the fixed shaft, and the first wheel and the second wheel are each connected to at least one pull wire; the knob assembly includes a first knob and a second knob, and the first knob and the second knob are sequentially mounted on the fixed shaft along the axial direction of the fixed shaft, and the first knob is connected to the first wheel, and the second knob is connected to the second wheel.

[0021] In one embodiment, the elastic member comprises:

[0022] a first elastic member, the first elastic member being disposed between the limiting assembly and the first knob; and

[0023] A second elastic member is provided between the second knob and the handle body.

[0024] In one embodiment, the handle bending and locking mechanism also includes a partition, which is arranged between the first knob and the second knob, the partition is provided with a first through hole, the second knob is provided with an avoidance groove, the handle body is connected to a column, and one end of the column passes through the avoidance groove and is inserted into the first through hole.

[0025] In one embodiment, the first wheel disc and the second wheel disc each include a sleeve and a disc body connected to one end of the sleeve, the sleeve of the first wheel disc is sleeved outside the fixed shaft and connected to the first knob, and the sleeve of the second wheel disc is sleeved outside the sleeve of the first wheel disc and connected to the second knob.

[0026] In one embodiment, each of the trays is connected to at least one pull wire, and an end of each of the pull wires away from the insertion tube is adjustably disposed on the tray.

[0027] In one embodiment, the wheel assembly further includes a first threaded member, the disk body is provided with a first threaded hole extending along the length direction of the pull wire and passing through the disk body, the first threaded member is threadedly engaged with the first threaded hole, and the end of the pull wire away from the insertion tube is passed through the first threaded hole and connected to the first threaded member.

[0028] In one embodiment, the first threaded member is provided with a first threading hole and a second threading hole that are connected in the axial direction, the aperture of the first threading hole is larger than the aperture of the second threading hole, the pull wire is passed through the second threading hole, and a first limiting portion is provided at the end of the pull wire away from the insertion tube, the first limiting portion is located in the first threading hole, and the diameter of the first limiting portion is larger than the aperture of the second threading hole.

[0029] In one embodiment, the wheel assembly also includes a second threaded member, the disk body is provided with a second threaded hole that is at an angle to the length direction of the pull wire, the second threaded member is threadedly engaged with the second threaded hole, the end of the pull wire away from the insertion tube is connected to the second threaded member, and the second threaded member is used to reel in the pull wire so that the pull wire is tightened in the direction away from the insertion tube.

[0030] In one embodiment, the second threaded member is radially provided with a third threading hole and a fourth threading hole that are connected to and pass through the second threaded member, the aperture of the third threading hole is larger than the aperture of the fourth threading hole, the pull wire is passed through the fourth threading hole, and a second limiting portion is provided at the end of the pull wire away from the insertion tube, the second limiting portion is located in the third threading hole, and the diameter of the second limiting portion is larger than the aperture of the fourth threading hole.

[0031] In one embodiment, the wheel assembly also includes a third threaded member, the disk body is provided with a third threaded hole and a fifth threading hole, the fifth threading hole extends along the length direction of the pull wire and passes through the disk body, the pull wire is passed through the fifth threading hole, the third threaded hole is connected to the fifth threading hole and is arranged at an angle, the third threaded member is threadedly engaged with the third threaded hole, and the third threaded member is used to crimp the pull wire to the crimping position in the fifth threading hole or release the pull wire from the loose position.

[0032] In one embodiment, the handle bending control locking mechanism also includes a fixing cap and a fifth threaded component, the fixing cap is provided with a second through hole, the fixing cap is sleeved on the end of the fixing shaft away from the handle body, the end of the fixing shaft away from the handle body is provided with a fifth threaded hole, the second through hole is connected to the fifth threaded hole, the fifth threaded component is passed through the second through hole and threadedly engaged with the fifth threaded hole.

[0033] In one embodiment, the handle bending and locking mechanism further includes a ferrule and a strap, wherein the ferrule and the strap are spaced apart and arranged on the same side of the handle body, the ferrule is provided with a fixing groove for fixing another endoscope, and the strap is used to bind the other endoscope.

[0034] On the other hand, the present application also provides an endoscope handle, which includes the above-mentioned handle bending control and locking mechanism, and a handle body.

[0035] In one embodiment, the handle body includes a first shell and a second shell that are interlocked with each other, and the first shell and the second shell enclose an installation cavity, and the bending control assembly is located in the installation cavity; the knob assembly, the elastic member and the limit assembly are all located outside the installation cavity.

[0036] In one embodiment, the first shell includes a first connecting part, the second shell includes a second connecting part, and the first connecting part and the second connecting part are connected by a fourth screw member; one of the first connecting part and the second connecting part is provided with a second protrusion, and the other one is provided with a second groove, and the second protrusion is inserted into the second groove.

[0037] On the other hand, the present application also provides an endoscope system, comprising the above-mentioned endoscope handle and an insertion tube, wherein the proximal end of the insertion tube is connected to the endoscope handle.

[0038] In one embodiment, the insertion tube includes an insertion tube body, a head end piece, an inner sleeve and an outer sleeve, the inner sleeve is sleeved on the distal end of the insertion tube body, one end of the outer sleeve is sleeved on the proximal end of the head end piece, and the other end of the outer sleeve is sleeved on 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 connected to the first instrument channel, the central axis of the first instrument channel is not coaxial with the central axis of the second instrument channel, and there is a transition gap between the second instrument channel and the first instrument channel.

[0039] In one embodiment, the proximal end of the head end piece is provided with a protrusion protruding toward the insertion tube body, and the protrusion is used to guide and fix the instrument inserted into the first instrument channel.

[0040] When the insertion tube needs to be bent, the handle bend locking mechanism can be driven by rotating the knob assembly. This movement of the bend control assembly causes the pull wire to pull the distal end of the insertion tube to bend and turn. After the insertion tube is bent to a desired angle, if the angle of the insertion tube needs to be locked, at least a portion of the limiter assembly is moved axially along the fixed axis. This axial movement applies an axial compressive force to the elastic member, causing the elastic member to elastically deform upon being compressed, increasing the damping of the knob assembly. This limits the free rotation of the knob assembly when no external force is applied to the knob assembly, thereby preventing the wheel assembly from rotating due to the restoring force of the insertion tube, thereby locking the insertion tube's bending angle. Furthermore, the frictional force exerted by the elastic member on the knob assembly limits its rotation without locking the knob assembly. At this point, by applying a force greater than the frictional force, the knob assembly can be rotated again, thereby fine-tuning the insertion tube's bending angle until the insertion tube is adjusted to the desired bending state. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. 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 creative work.

[0043] Figure 1 This is a schematic structural diagram of an endoscope handle according to an embodiment;

[0044] Figure 2 for Figure 1 A cross-sectional view of an endoscope handle shown in ;

[0045] Figure 3 for Figure 1 A partial enlarged view of the endoscope handle shown in FIG;

[0046] Figure 4 The internal structure of an endoscope handle according to an embodiment Figure 1 ;

[0047] Figure 5 The internal structure of an endoscope handle according to an embodiment Figure 2 ;

[0048] Figure 6 for Figure 1 A partial exploded view of the handle bending control locking mechanism shown in FIG;

[0049] Figure 7 A schematic structural diagram of a second position-limiting member and a first position-limiting member according to an embodiment;

[0050] Figure 8 for Figure 7 Schematic diagram of assembly of the second limiting member and the first limiting member shown in ;

[0051] Figure 9 for Figure 2 A partial enlarged view of the part A shown in FIG;

[0052] Figure 10 This is a schematic diagram of the connection between the pull wire and the first rotating disk according to an embodiment;

[0053] Figure 11 for Figure 10 A top view of the pull wire and the first turntable shown in ;

[0054] Figure 12 This is a schematic structural diagram of a first threaded member according to an embodiment;

[0055] Figure 13 This is a schematic structural diagram of a pull wire according to an embodiment;

[0056] Figure 14 for Figure 12 The first threaded member shown in Figure 13 Schematic diagram of the connection structure of the pull wire shown in;

[0057] Figure 15 A schematic diagram of the connection between the pull wire and the first rotating disk according to another embodiment;

[0058] Figure 16 for Figure 15 A top view of the pull wire and the first turntable shown in ;

[0059] Figure 17 is a schematic structural diagram of a second threaded member according to an embodiment;

[0060] Figure 18 A schematic structural diagram of a pull wire according to another embodiment;

[0061] Figure 19 for Figure 17 The second threaded member shown in Figure 18 Schematic diagram of the connection structure of the pull wire shown in;

[0062] Figure 20 This is a schematic diagram of the connection between the pull wire and the first rotating disk according to another embodiment;

[0063] Figure 21 for Figure 15 A cross-sectional view of the pull wire and the first rotary disk shown in ;

[0064] Figure 22 for Figure 15 A top view of the pull wire and the first turntable shown in ;

[0065] Figure 23 is a schematic structural diagram of a first turntable according to an embodiment;

[0066] Figure 24 for Figure 23 A top view of the first turntable shown in ;

[0067] Figure 25 This is a schematic diagram of the connection between the pull wire and the first rotating disk according to another embodiment;

[0068] Figure 26 for Figure 25 A top view of the first turntable shown in ;

[0069] Figure 27 is a schematic structural diagram of an endoscope handle according to another embodiment;

[0070] Figure 28 for Figure 27 A schematic diagram of the endoscope handle shown in another angle;

[0071] Figure 29 This is a schematic structural diagram of an insertion tube according to an embodiment;

[0072] Figure 30 for Figure 29 A cross-sectional view of the insertion tube shown in ;

[0073] Figure 31 for Figure 29 Schematic diagram of the structure of the insertion tube after omitting the outer sleeve;

[0074] Figure 32 This is a schematic structural diagram of a head end piece according to an embodiment.

[0075] Description of reference numerals:

[0076] 10. Handle body; 11. First shell; 111. First connecting portion; 112. Second groove; 12. Second shell; 121. Second connecting portion; 122. Second protrusion; 13. Mounting cavity; 14. Fourth threaded member; 15. Card sleeve; 151. Fixing groove; 16. Band; 20. Insertion tube; 201. Insertion tube body; 202. Head end member; 203. Protrusion; 211. Second instrument channel; 212. First instrument channel; 22. Inner sleeve; 23. Outer sleeve; 24. Transition interval; 30. Knob assembly; 31. First knob; 32. Second knob; 33. Locking knob; 40. Fixed shaft; 41. Fixed cap; 42. Fifth threaded member; 50. Wheel assembly; 51. First wheel Disk; 52, second wheel disc; 53, disk body; 531, first threaded hole; 532, second threaded hole; 533, wire groove; 534, fifth threading hole; 535, third threaded hole; 54, bushing; 55, first threaded member; 551, first threading hole; 552, second threading hole; 56, second threaded member; 561, third threading hole; 562, fourth threading hole; 57, third threaded member; 61, first limiting member; 611, second inclined surface; 612, first groove; 62, second limiting member; 621, first inclined surface; 622, first protrusion; 71, first elastic member; 72, second elastic member; 80, pull wire; 81, first limiting portion; 82, second limiting portion; 91, partition; 92, column. DETAILED DESCRIPTION

[0077] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0078] Specifically, in this application, “proximal end” refers to the end of a component close to a surgical operator; and “distal end” refers to the end of a component away from a surgical operator.

[0079] See also Figures 1 to 5 Specifically, the handle bending and locking mechanism of one embodiment includes a fixed shaft 40, a knob assembly 30, a limit assembly, and an elastic member.

[0080] Specifically, the fixed shaft 40 is mounted on the handle body 10, which includes a first shell 11 and a second shell 12 that interlock together to form a mounting cavity 13. Furthermore, the handle body is connected to the proximal end of an insertion tube 20. The insertion tube 20 is designed to be inserted into the human body through a natural orifice or a micro-incision. The proximal end of the insertion tube 20 is connected to the handle body 10, while the distal end of the insertion tube 20 is equipped with components such as an LED and a lens to obtain image information from within the human body.

[0081] Specifically, one end of the fixed shaft 40 is fixedly connected to the second shell 12, and the other end of the fixed shaft 40 passes through the first shell 11 and extends out of the installation cavity 13, so that the fixed shaft 40 forms a first section located inside the installation cavity 13 and a second section located outside the installation cavity 13.

[0082] The knob assembly 30 is movably mounted on the second section of the fixed shaft 40 and is used to connect to the bending control assembly. The knob assembly 30 is used to drive the bending control assembly to move. The movement of the bending control assembly can cause 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. The wheel assembly 50 is rotatably mounted on the first section of the fixed shaft 40 and connected to the knob assembly 30. One end of the pull wire 80 is connected to the wheel assembly 50, and the other end of the pull wire 80 is connected to the distal end of the insertion tube 20. Therefore, by driving the wheel assembly 50 to rotate through the knob assembly 30, the wheel assembly 50 can pull the pull wire 80 in a direction away from the insertion tube 20, so that the pull wire 80 pulls the distal end of the insertion tube 20 to bend and turn.

[0083] The limiting assembly is sleeved on the fixed shaft 40 and is located on the side of the knob assembly 30 away from the handle body 10. At least a portion of the limiting assembly can move along the axial direction of the fixed shaft so that at least a portion of the limiting assembly squeezes 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. The first limiting member 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 contacts and cooperates 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 also connected to a locking knob 33, and the locking knob 33 facilitates the rotation of the second limiting member 62. It is understandable that there are many ways to achieve the axial movement of the limit assembly along the fixed shaft 40 to tighten the knob assembly, which are not limited to the above embodiments. For example, in another embodiment, the limit assembly can also be a nut, which is threadedly connected to the fixed shaft, so that by rotating the nut, the nut can also be moved axially along the fixed shaft 40 to tighten the knob assembly.

[0084] The elastic member is arranged in contact with the knob assembly, so that when the limit assembly moves axially along the fixed shaft 40 to squeeze the knob assembly 30 and the elastic member, the elastic member deforms and generates friction on the knob assembly 30. This friction can lock the knob assembly 30 and prevent the knob assembly from rotating. Preferably, in one embodiment, the number of elastic members is two, namely a first elastic member 71 and a second elastic member 72, wherein the first elastic member 71 is arranged between the first limit member 61 and the knob assembly 30. The second elastic member 72 is arranged between the knob assembly 30 and the handle body 10, thereby further increasing the size. Preferably, the materials of the first elastic member 71 and the second elastic member 72 are both elastic materials, such as rubber rings or rubber pads. It is understandable that the number of elastic members is not limited to the above two. In other embodiments, the number of elastic members can also be set to one or more as required.

[0085] Specifically, when the insertion tube 20 needs to be bent, the handle bending and locking mechanism can rotate the knob assembly 30 to drive the wheel assembly 50 to rotate. When the wheel assembly 50 rotates, it can pull the pull wire 80 away from the insertion tube 20, thereby causing the pull wire 80 to pull the distal end of the insertion tube 20 to bend and turn. After the insertion tube 20 is bent to a suitable angle, when the angle of the insertion tube 20 needs to be locked, the second limiter 62 is rotated by the locking knob 33. The second limiter 62 can drive the first limiter 61 to move axially along the fixed shaft 40. After the first limiter 61 moves axially, it can apply an axial extrusion force to the first elastic member 71. After being extruded, the first elastic member 71 can axially press the knob assembly 30, causing the knob assembly 30 to move axially and squeeze the second elastic member 72. When squeezed, both the first and second elastic members 71, 72 elastically deform, increasing the damping of the knob assembly 30. This restricts the free rotation of the knob assembly 30 when no external force is applied, thereby preventing the wheel assembly 50 from rotating due to the restoring force of the insertion tube 20 and locking the bending angle of the insertion tube 20. Furthermore, the frictional force exerted by the first and second elastic members 71, 72 on the knob assembly 30 limits its rotation without locking it. By applying a force greater than the frictional force to the knob assembly 30, the knob assembly 30 can be rotated again, thereby fine-tuning the bending angle of the insertion tube 20 until the insertion tube 20 is adjusted to the desired bending state.

[0086] Furthermore, the wheel assembly 50 includes at least one wheel, all of which are sequentially mounted on the fixed shaft 40 along the axial direction of the fixed shaft 40, and each wheel is connected to at least one pull wire 80; the knob assembly 30 includes at least one knob, all of which are sequentially mounted on the fixed shaft 40 along the axial direction of the fixed shaft 40, and the knobs are connected to the wheels in a one-to-one correspondence, thereby realizing multi-directional bending of the insertion tube 20.

[0087] Specifically, see Figure 3 as well as Figure 6 In this embodiment, the wheel assembly 50 includes a first wheel 51 and a second wheel 52. The first wheel 51 and the second wheel 52 are sequentially mounted on the fixed shaft 40 along the axial direction of the fixed shaft 40. Each of the first wheel 51 and the second wheel 52 is connected to at least one pull wire 80. Correspondingly, the knob assembly 30 includes a first knob 31 and a second knob 32. The first knob 31 and the second knob 32 are sequentially mounted on the fixed shaft 40 along the axial direction of the fixed shaft 40. The first knob 31 is connected to the first wheel 51, and the second knob 32 is connected to the second wheel 52. Preferably, the first wheel 51 is connected to two pull wires 80. By rotating the first knob 31 in different directions, the first wheel 51 can be driven to rotate in the corresponding directions, thereby controlling the insertion tube 20 to bend in two different directions, such as left and right. Similarly, the second wheel 52 is connected to 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.

[0088] Furthermore, 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, by rotating the second stopper 62 with the locking knob 33, the second stopper 62 can drive the first stopper 61 to move axially along the fixed shaft 40. This axial movement of the first stopper 61 applies an axial compressive force to the first elastic member 71. This compressive force causes the first elastic member 71 to elastically deform, thereby increasing damping on the first knob 31 and limiting its free rotation. Simultaneously, this compressive force exerts axial pressure on the first knob 31, causing it to move axially and thereby exert an axial compressive force on the second knob 32. Upon receiving this axial compressive force, the second knob 32 moves axially toward the handle body 10, thereby compressing the second elastic member 72. This compressive force causes the second elastic member 72 to elastically deform, thereby increasing damping on the second knob 32 and limiting its free rotation. At this point, when there is no external force to rotate the first knob 31 and the second knob 32, the first knob 31 and the second knob 32 are locked, thereby preventing the first knob 31 and the second knob 32 from rotating due to the restoring force of the insertion tube 20, thereby locking the bending angle of the insertion tube 20.

[0089] Furthermore, in order to avoid the problem that the first knob 31 and the second knob 32 affect each other due to the influence of contact friction when the first knob 31 or the second knob 32 is rotated to fine-tune the bending angle of the insertion tube 20 after the first knob 31 and the second knob 32 are locked, the handle bending control locking mechanism of an embodiment of the present application further includes a separator 91, which is arranged between the first knob 31 and the second knob 32, and the separator 91 is provided with a first through hole, and the second knob 32 is provided with an avoidance groove. The handle body 10 is connected to a column 92, and the column 9 One end of the guide pin 2 passes through the avoidance groove and is inserted into the first through-hole, thereby separating the first knob 31 and the second knob 32 via the separator 91, preventing direct contact between the first knob 31 and the second knob 32. At the same time, the pillar 92 is inserted into the connecting hole of the separator 91, thereby limiting the rotation of the separator 91 without affecting the axial movement of the separator 91 along the fixed shaft 40. This avoids the problem of mutual influence between the first and second knobs 31, 32 due to contact friction, thereby enabling more precise adjustment of the bending angle of the insertion tube 20. Preferably, the avoidance groove is an arc-shaped groove to prevent the pillar 92 from affecting the rotation of the second knob 32.

[0090] Continue to see Figure 7 as well as Figure 8 Furthermore, a first inclined surface 621 is provided on a side of the second limiting member 62 proximate to the first limiting member 61, and a second inclined surface 611 is provided on a side of the first limiting member 61 proximate to the second limiting member 62. The first inclined surface 621 slidably engages with the second inclined surface 611. The second limiting member 62 has an unlocked position and a locked position, and is rotatable between the unlocked and locked positions. Specifically, during the process of the second limiting member 62 rotating from the unlocked position to the locked position, the first inclined surface 621 slidably engages with the second inclined surface 611, thereby driving the first limiting member 61 to move axially, thereby causing the first limiting member 61 to press against the first elastic member 71. When the second limiting member 62 rotates back to the unlocked position, the first limiting member 61 releases the first elastic member 71.

[0091] Furthermore, the first inclined surface 621 is provided with a first protrusion 622, and the second inclined surface 611 is provided with a first groove 612. When the second limiting member 62 is in the locked position, the first protrusion 622 is embedded in the first groove 612, thereby locking the second limiting member 62 in the locked position and preventing the second limiting member 62 from rotating. At the same time, when the first protrusion 622 enters the first groove 612, it collides with the groove wall of the first groove 612, thereby producing a crisp sound, thereby reminding the operator that the second limiting member 62 has rotated to the locked position and avoiding over-rotation. Of course, it is worth mentioning that in another embodiment. The first groove 612 can also be provided on the first inclined surface 621, and the first protrusion 622 can also be provided on the second inclined surface 611. In this way, the purpose of locking the second limiting member 62 in the locked position and reminding the operator that the second limiting member 62 has rotated into place can also be achieved. This will not be elaborated here. Preferably, the first protrusion 622 is an arc-shaped protrusion, and correspondingly, the first groove 612 is an arc-shaped groove, so that the first protrusion 622 can more easily enter or exit the first groove 612.

[0092] See also Figure 3 To prevent the second limiting member 62 from dislodging from the fixed shaft 40, in one embodiment, the handle bend control 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 and is sleeved on the end of the fixed shaft 40 away from the handle body 10. The end of the fixed shaft 40 away from the handle body 10 is provided with a fifth threaded hole, the second through hole being connected to the fifth threaded hole, and the fifth threaded member 42 is passed through the second through hole and threadedly engaged with the fifth threaded hole. The fixing cap 41 is used to limit the second limiting member 62 from dislodging from the fixed shaft 40, and fixing the fixing cap 41 with the fifth threaded member 42 can prevent the rotating fixing member from driving the fixing cap 41 when rotating, thereby preventing the fixing cap 41 from loosening, thereby ensuring the effectiveness of the handle bend control locking mechanism in controlling the bend and locking function of the insertion tube 20.

[0093] In the present application, the first wheel 51 or the second wheel 52 is rotated to pull the pull wire 80, thereby realizing the bending control of the distal end of the insertion tube 20. Generally, the material of the pull wire 80 is mostly metal wire or other soft wire. After multiple bending controls, the pull wire 80 will stretch and become longer, causing the pull wire 80 to become loose, and then inevitably there will be a phenomenon of idle travel of the pull wire 80. The idle travel phenomenon requires the doctor to turn the first knob 31 or the second knob 32 to a certain angle before the insertion tube 20 begins to bend. In this way, the maximum bending angle of the insertion tube 20 often fails to meet expectations. The insufficient bending angle of the insertion tube 20 will affect the doctor's search for the lesion, or even miss the lesion. It will also affect the doctor's lithotripsy, biopsy and other operations, prolonging the operation time and increasing the patient's surgical risk.

[0094] To address the above-mentioned issues, the present invention provides a pull cable with one end position adjustable at the wheel assembly 50. Thus, by adjusting the position of the pull cable relative to the wheel assembly, the tightness of the pull cable 80 can be adjusted, thereby resolving the issue of lost travel of the pull cable 80. Specifically, the first wheel 51 and the second wheel 52 each include a sleeve 54 and a disc body 53 connected to one end of the sleeve 54. The sleeve 54 of the first wheel 51 is sleeved outside the fixed shaft 40 and connected to the first knob 31. The sleeve 54 of the second wheel 52 is sleeved outside the sleeve 54 of the first wheel 51 and connected to the second knob 32. Furthermore, the position of one end of the pull wire 80 away from the insertion tube 20 is adjustably set on the disk body 53, so that the pull wire 80 can be tightened in the direction away from the insertion tube 20. When the pull wire 80 is stretched and lengthened due to long-term use, and then becomes loose, the pull wire 80 can be further tightened by adjusting the position of the one end of the pull wire 80 away from the insertion tube 20 on the disk body 53, so that the pull wire 80 is re-tightened, thereby avoiding the phenomenon of the pull wire 80 having an idle path.

[0095] See also Figure 10 as well as Figure 11 In one embodiment, the wheel assembly 50 also includes a first threaded member 55, and the disk body 53 is provided with a first threaded hole 531 extending along the length direction of the pull wire 80 and passing through the disk body 53. The first threaded member 55 is threadedly engaged with the first threaded hole 531, and the end of the pull wire 80 away from the insertion tube 20 is passed through the first threaded hole 531 and connected to the first threaded member 55. When the pull wire 80 is stretched and lengthened due to long-term use, and then the pull wire 80 becomes loose, the first threaded member 55 is rotated to move the first threaded member 55 away from the insertion tube 20, thereby tightening the pull wire 80 away from the insertion tube 20, so that the pull wire 80 is re-tightened, thereby avoiding the phenomenon of idle travel of the pull wire 80.

[0096] Further, see Figures 12 to 14 In this embodiment, the first threaded member 55 is axially defined with a first threading hole 551 and a second threading hole 552 that are interconnected. The diameter of the first threading hole 551 is larger than that of the second threading hole 552. The pull wire 80 is passed through the second threading hole 552. The end of the pull wire 80 away from the insertion tube 20 is provided with a first stopper 81. The first stopper 81 is located in the first threading hole 551. The diameter of the first stopper 81 is larger than the diameter of the second threading hole 552. This allows the end of the pull wire 80 away from the insertion tube 20 to move synchronously with the first threaded member 55 in a direction away from the insertion tube 20, thereby tightening the pull wire 80. It is worth noting that in other embodiments, the end of the pull wire 80 away from the insertion tube 20 can also be directly tied or fixed to the first threaded member 55 by adhesive bonding.

[0097] Preferably, in this embodiment, each disk body 53 is provided with two pull wires 80, and correspondingly, each disk body 53 is provided with two first threaded holes 531, and each first threaded hole 531 is provided with a first threaded member 55. The two pull wires 80 are connected to the two first threaded members 55 one by one, thereby realizing four-way bending control of the insertion tube 20 through the four pull wires 80.

[0098] See also Figure 15 as well as Figure 16 In another embodiment, the wheel assembly 50 further includes a second threaded member 56. The disc body 53 is provided with a second threaded hole 532 that is angled with the length direction of the pull wire 80. Preferably, the axis direction of the second threaded hole 532 is perpendicular to the length direction of the pull wire 80. The second threaded member 56 is threadedly engaged with the second threaded hole 532. The end of the pull wire 80 away from the insertion tube 20 is connected to the second threaded member 56. The second threaded member 56 is used to reel in the pull wire 80 so as to tighten the pull wire 80 in a direction away from the insertion tube 20. Specifically, when the pull wire 80 stretches and becomes loose due to long-term use, the pull wire 80 can be gradually wound onto the second threaded member 56 by rotating the second threaded member 56, thereby tightening the pull wire 80 in a direction away from the insertion tube 20, so that the pull wire 80 is re-tightened, thereby avoiding the phenomenon of the pull wire 80 being idle.

[0099] Further, see Figures 17 to 19 The second threaded member 56 is radially defined with a third threading hole 561 and a fourth threading hole 562 that are interconnected and extend through the second threaded member 56. The diameter of the third threading hole 561 is larger than that of the fourth threading hole 562. The pull wire 80 is threaded through the fourth threading hole 562. The end of the pull wire 80 away from the insertion tube 20 is provided with a second stopper 82. The second stopper 82 is located in the third threading hole 561, and the diameter of the second stopper 82 is larger than the diameter of the fourth threading hole 562. This ensures that the end of the pull wire 80 away from the insertion tube 20 is connected and fixed to the second threaded member 56. Rotating the second threaded member 56 allows the pull wire 80 to be wound around the second threaded member 56, thereby tightening the pull wire 80. It is worth noting that in other embodiments, the end of the pull wire 80 away from the insertion tube 20 can also be directly tied or secured to the second threaded member 56 via adhesive.

[0100] Further, see Figure 15 The disc body 53 is also provided with a wire groove 533 which runs through the disc body 53 in the radial direction. The end of the pull wire 80 away from the insertion tube 20 is passed through the wire groove 533 and connected to the second threaded member 56, thereby preventing the pull wire 80 from interfering with the disc body 53 when the second threaded member 56 reels the pull wire 80.

[0101] Preferably, in this embodiment, each disk body 53 is provided with two pull wires 80, and correspondingly, each disk body 53 is provided with two second threaded holes 532, and each second threaded hole 532 is provided with a second threaded member 56. The two pull wires 80 are connected to the two second threaded members 56 one by one, thereby realizing four-way bending control of the insertion tube 20 through the four pull wires 80.

[0102] See also Figures 20 to 24 In another embodiment, the wheel assembly 50 includes a third threaded member 57. The disc body 53 defines a third threaded hole 535 and a fifth threading hole 534. The fifth threading hole 534 extends along the length of the cable 80 and penetrates the disc body 53. The cable 80 is passed through the fifth threading hole 534. The third threaded hole 535 and the fifth threading hole 534 are connected and arranged at an angle. Preferably, the third threaded hole 535 and the fifth threading hole 534 are arranged perpendicular to each other. The third threaded member 57 is threadedly engaged with the third threaded hole 535. Specifically, rotating the third threaded member 57 can move the third threaded member 57 between a crimping position and a release position. In the crimping position, the third threaded member 57 can crimp the cable 80 into the fifth threading hole 534. In the release position, the third threaded member 57 releases the cable 80. Specifically, when the handle bending control locking mechanism is operating normally, the third threaded member 57 is in the crimping position. At this time, one end of the third threaded member 57 presses the pull wire 80, so that the pull wire 80 can be pulled when the disc 53 is rotated, thereby achieving bending control of the insertion tube 20. It should be noted that when the pull wire 80 stretches and becomes loose due to long-term use, the third threaded member 57 can be loosened by loosening the third threaded member 57 so that the third threaded member 57 enters the loosened position, thereby loosening the pull wire 80. At this time, the pull wire 80 can be straightened away from the insertion tube 20 to re-tighten the pull wire 80. The third threaded member 57 can then be tightened again so that the third threaded member 57 returns to the crimping position to compress the pull wire 80, thereby keeping the pull wire 80 taut and avoiding the phenomenon of the pull wire 80 being idle.

[0103] Preferably, in this embodiment, each disk body 53 is provided with two pull wires 80, and correspondingly, each disk body 53 is provided with two third threaded holes 535 and two fifth threading holes 534, and a third threaded member 57 is provided in each third threaded hole. The two pull wires 80 are connected to the two third threaded members 57 one by one, thereby realizing four-way bending control of the insertion tube 20 through the four pull wires 80.

[0104] See also Figure 25 as well as Figure 26In another embodiment, the two fifth threading holes 534 are connected to each other. Along the trajectory of the fifth threading holes 534, a plurality of third threaded holes 535 are arranged at intervals on the disk body 53. After the pull wire 80 is straightened in the direction away from the insertion tube 20, the third threaded member 57 is passed through different third threaded holes 535, so that different parts of the pull wire 80 can be tightened.

[0105] Furthermore, Figure 21 The handle bending control locking mechanism of the illustrated embodiment does not require drilling holes on the third threaded member 57 , and can adjust the tightness of the pull wire 80 using standard threaded members such as standard bolts, resulting in a simpler process and lower costs.

[0106] Further, see Figure 2 as well as Figure 9 The first shell 11 includes a first connecting portion 111, and the second shell 12 includes a second connecting portion 121. The first connecting portion 111 and the second connecting portion 121 are connected by a fourth screw member 14, thereby achieving the connection and fixation between the first shell 11 and the second shell 12. Furthermore, the first connecting portion 111 is provided with a second protrusion 122, and the second connecting portion 121 is provided with a second groove 112. The second protrusion 122 is inserted into the second groove 112, so that the mating surfaces of the first connecting portion 111 and the second connecting portion 121 form a stepped structure, thereby preventing the pull wire 80 from entering the mating gap between the first connecting portion 111 and the second connecting portion 121, and further preventing the pull wire 80 from breaking due to the mating friction with the first connecting portion 111 and the second connecting portion 121. Of course, in another embodiment, the second groove 112 can also be provided on the first connecting portion 111, and the second protrusion 122 can also be provided on the second connecting portion 121. This can also achieve the purpose of preventing the pull wire 80 from breaking, which will not be elaborated here.

[0107] Further, see Figures 27 to 28The handle bending control and locking mechanism also includes a sleeve 15 and a strap 16. The sleeve 15 and the strap 16 are arranged at intervals on the handle body 10. The sleeve 15 is provided with a fixing groove 151 for fixing another endoscope, and the strap 16 is used to tie another endoscope. Specifically, many surgeries require two endoscopes to be used together. The two endoscopes can be respectively called a sub-endoscope and a mother endoscope. In order to facilitate the doctor's surgical operation and reduce the length of the operation, the sub-endoscope and the mother endoscope are often required to be fixed together to facilitate the doctor's use. The handle bending control and locking mechanism of this embodiment is arranged at intervals on the handle body 10 of the sub-endoscope, and is clamped with the handle body of the mother endoscope through the fixing groove 151 of the sleeve 15, and then tied to the handle body of the mother endoscope through the strap 16, so that the mother endoscope has two fixing points, so that the mother endoscope is firmly fixed on the handle body 10 of the sub-endoscope, thereby avoiding the mother endoscope from shaking when the sub-endoscope and the mother endoscope are used together. Preferably, the ferrule 15 and the strap 16 are arranged on the same side of the handle body 10, and the ferrule 15 is close to the distal end of the handle body 10, and the strap 16 is close to the proximal end of the handle body 10. When connecting the mother mirror, the ferrule 15 is clamped to the tail end of the handle body of the mother mirror (the end close to the insertion tube), and the strap 16 is tied to the middle upper part of the handle body of the mother mirror.

[0108] In another aspect, the present application further provides an endoscope handle, which includes the handle bending and locking mechanism of any of the above embodiments. The specific structure and beneficial effects of the handle bending and locking mechanism can be seen in the above description and will not be repeated here.

[0109] The present application also provides an endoscope system, which includes the above-mentioned endoscope handle and an insertion tube. The proximal end of the insertion tube is connected to the endoscope handle, and the endoscope handle can be used to control the insertion tube to bend or perform other inspection functions.

[0110] Further, see Figures 29 to 30In this embodiment, the insertion tube 20 includes an insertion tube body 201, a tip piece 202, an inner cannula 22, and an outer cannula 23. The inner cannula 22 is mounted on the distal end of the insertion tube body 201, one end of the outer cannula 23 is mounted on the proximal end of the tip piece 202, and the other end of the outer cannula 23 is mounted on the inner cannula 22. The tip piece 202 is provided with a first instrument channel 212, and the insertion tube body 201 is provided with a second instrument channel 212 connected to the first instrument channel 212. Both the first instrument channel 212 and the second instrument channel 211 are used to pass instruments. Furthermore, the central axis of the first instrument channel 212 is not coaxial with the central axis of the second instrument channel 211. This design optimizes the layout of the tip of the insertion tube 20. The outlet of the first instrument channel 212 is offset from the center of the tip, providing more space for components such as a camera and a light source. In order to prevent the instrument from bending and breaking when passing from the second instrument channel 211 to the first instrument channel 212, a transition gap 24 is provided between the outlet of the second instrument channel 211 and the entrance to the first instrument channel 212. When the instrument passes from the second instrument channel 211 to the first instrument channel 212, the transition gap 24 can leave a certain transition space for the instrument, thereby avoiding the problem that the instrument needs to bend at a large angle to 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, thereby avoiding the breakage and damage of the instrument.

[0111] Further, see Figure 31 as well as Figure 32 The proximal end of the headpiece 202 is provided with a protrusion 203 that projects toward the insertion tube body. This protrusion 203 is used to guide and secure an instrument inserted into the first instrument channel 212, ensuring that the instrument can be accurately inserted into the first instrument channel 212 after exiting the second instrument channel 211, thereby preventing the instrument from being inserted into other locations, such as the gap between the inner cannula 22 and the insertion tube 20. Preferably, the proximal end of the handle body 10 is provided with at least two bosses, spaced axially along the proximal end of the handle body 10, thereby enhancing the guiding and securing effects on the instrument.

[0112] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0113] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

[0114] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0115] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0116] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0117] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0118] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

Claims

1. A handle bending control locking mechanism, characterized in that: include: A fixed shaft, the fixed shaft being used to be mounted on the handle body; a knob assembly, the knob assembly being movably mounted on the fixed shaft and being connected to the bending control assembly, the knob assembly being used to drive the bending control assembly to move, and the movement of the bending control assembly being used to bend the distal end of the insertion tube; an elastic member, the elastic member being arranged in contact with the knob assembly; and A limit assembly, the limit assembly being sleeved on the fixed shaft, at least a portion of which is movable along the axial direction of the fixed shaft to squeeze the knob assembly and the elastic member, causing the elastic member to lock the knob assembly from rotating; wherein: The knob assembly includes a first knob and a second knob; The elastic member includes a first elastic member and a second elastic member, the first elastic member is arranged between the limiting assembly and the first knob, and the second elastic member is arranged between the second knob and the handle body; The handle bending and locking mechanism also includes a separator, which is arranged between the first knob and the second knob. The separator is provided with a first through hole, and the second knob is provided with an avoidance groove. The handle body is connected to a column, and one end of the column passes through the avoidance groove and is inserted into the first through hole.

2. The handle bending control locking mechanism according to claim 1, characterized in that: The limiting component includes: a first limiting member; the first limiting member is sleeved on the fixed shaft and can move along the axial direction of the fixed shaft; and The second limiting member is rotatably mounted on the fixed shaft, and the second limiting member is in contact with and cooperates with the first limiting member. When the second limiting member rotates around the fixed shaft, the second limiting member drives the first limiting member to move axially along the fixed shaft.

3. The handle bending control locking mechanism according to claim 2, characterized in that: The second limit member is provided with a first inclined surface on a side close to the first limit member, and the first limit member is provided with a second inclined surface on a side close to the second limit member, and the first inclined surface and the second inclined surface are slidably matched; the second limit member can rotate between an unlocked position and a locked position to drive the first limit member to move axially along the fixed axis, and when the second limit member is in the unlocked position, the first limit member loosens the knob assembly and the elastic member; when the second limit member is in the locked position, the first limit member presses the knob assembly and the elastic member.

4. The handle bending control locking mechanism according to claim 3, characterized in that: One of the first inclined surface and the second inclined surface is provided with a first protrusion, and the other one is provided with a first groove. When the second limiting member is in the locking position, the first protrusion is embedded in the first groove.

5. The handle bending control locking mechanism according to claim 3, characterized in that: The bending control assembly comprises: a wheel assembly, the wheel assembly being rotatably sleeved on the fixed shaft and connected to the knob assembly, the wheel assembly being capable of rotating around the fixed shaft driven by the knob assembly; and A pull wire, one end of which is connected to the wheel assembly, and the other end of which is used to connect to the distal end of the insertion tube, so that when the wheel assembly rotates around the fixed axis, the pull wire pulls the distal end of the insertion tube to bend.

6. The handle bending control locking mechanism according to claim 5, characterized in that: The wheel assembly includes a first wheel and a second wheel, the first wheel and the second wheel are sequentially mounted on the fixed shaft along the axial direction of the fixed shaft, and the first wheel and the second wheel are each connected to at least one pull wire; the first knob and the second knob are sequentially mounted on the fixed shaft along the axial direction of the fixed shaft, and the first knob is connected to the first wheel, and the second knob is connected to the second wheel.

7. The handle bending control locking mechanism according to claim 6, characterized in that: The first wheel disc and the second wheel disc both include 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 to the first knob. The shaft sleeve of the second wheel disc is sleeved outside the shaft sleeve of the first wheel disc and connected to the second knob.

8. The handle bending control locking mechanism according to claim 7, characterized in that: Each of the trays is connected to at least one pull wire, and one end of each pull wire away from the insertion tube is adjustably arranged on the tray.

9. The handle bending control locking mechanism according to claim 8, characterized in that: The wheel assembly also includes a first threaded part, the disk body is provided with a first threaded hole extending along the length direction of the pull wire and passing through the disk body, the first threaded part is threadedly engaged with the first threaded hole, and the end of the pull wire away from the insertion tube is passed through the first threaded hole and connected to the first threaded part.

10. The handle bending control locking mechanism according to claim 9, characterized in that: The first threaded member is provided with a first threading hole and a second threading hole that are connected in the axial direction. The aperture of the first threading hole is larger than the aperture of the second threading hole. The pull wire is passed through the second threading hole. The end of the pull wire away from the insertion tube is provided with a first limiting portion. The first limiting portion is located in the first threading hole. The diameter of the first limiting portion is larger than the aperture of the second threading hole.

11. The handle bending control locking mechanism according to claim 8, characterized in that: The wheel assembly also includes a second threaded member, the disc body is provided with a second threaded hole which is at an angle to the length direction of the pull wire, the second threaded member is threadedly engaged with the second threaded hole, the end of the pull wire away from the insertion tube is connected to the second threaded member, and the second threaded member is used to reel in the pull wire so that the pull wire is tightened in the direction away from the insertion tube.

12. The handle bending control locking mechanism according to claim 11, characterized in that: The second threaded member is radially provided with a third threading hole and a fourth threading hole which are connected to and pass through the second threaded member. The aperture of the third threading hole is larger than the aperture of the fourth threading hole. The pull wire is passed through the fourth threading hole. The end of the pull wire away from the insertion tube is provided with a second limiting portion. The second limiting portion is located in the third threading hole. The diameter of the second limiting portion is larger than the aperture of the fourth threading hole.

13. The handle bending control locking mechanism according to claim 8, characterized in that: The wheel assembly also includes a third threaded part, the disk body is provided with a third threaded hole and a fifth threading hole, the fifth threading hole extends along the length direction of the pull wire and passes through the disk body, the pull wire is passed through the fifth threading hole, the third threaded hole is connected to the fifth threading hole and is set at an angle, the third threaded part is threadedly engaged with the third threaded hole, and the third threaded part is used to crimp the pull wire into the fifth threading hole or loosen the pull wire.

14. The handle bending control locking mechanism according to claim 1, characterized in that: The handle bending control locking mechanism also includes a fixing cap and a fifth threaded component. The fixing cap is provided with a second through hole. The fixing cap is sleeved on the end of the fixing shaft away from the handle body. The end of the fixing shaft away from the handle body is provided with a fifth threaded hole. The second through hole is connected to the fifth threaded hole. The fifth threaded component is passed through the second through hole and threadedly engaged with the fifth threaded hole.

15. An endoscope handle, characterized in that: The endoscope handle includes the handle bending control and locking mechanism according to any one of claims 1 to 14, and a handle body.

16. The endoscope handle according to claim 15, characterized in that: The handle body includes a first shell and a second shell that are interlocked with each other. The first shell and the second shell enclose an installation cavity, and the bending control assembly is located in the installation cavity; the knob assembly, the elastic member and the limit assembly are all located outside the installation cavity.

17. The endoscope handle according to claim 16, characterized in that: The first shell includes a first connecting part, the second shell includes a second connecting part, and the first connecting part and the second connecting part are connected by a fourth screw member; one of the first connecting part and the second connecting part is provided with a second protrusion, and the other one is provided with a second groove, and the second protrusion is inserted into the second groove.

18. An endoscope system, characterized in that: The invention comprises the endoscope handle according to any one of claims 15 to 17 and an insertion tube, wherein the proximal end of the insertion tube is connected to the endoscope handle.

19. The endoscope system according to claim 18, wherein: The insertion tube includes an insertion tube body, a head end piece, an inner sleeve and an outer sleeve, the inner sleeve is sleeved on the distal end of the insertion tube body, one end of the outer sleeve is sleeved on the proximal end of the head end piece, and the other end of the outer sleeve is sleeved on the inner sleeve, the head end piece is provided with a first instrument channel, and the insertion tube body is provided with a second instrument channel connected to the first instrument channel, the central axis of the first instrument channel is not coaxial with the central axis of the second instrument channel, and there is a transition gap between the second instrument channel and the first instrument channel.

20. The endoscope system according to claim 19, wherein: The proximal end of the head end piece is provided with a protrusion protruding toward the insertion tube body, and the protrusion is used to guide and fix the instrument inserted into the first instrument channel.

Images