Bending driving mechanism, endoscope and endoscope system

Abstract

The utility model provides a bending driving mechanism, an endoscope and an endoscope system, the endoscope system comprises an image processing device, a light source device, a display device and the endoscope, the endoscope comprises a connecting part, an operating part and an inserting part, and the operating part comprises a handle and the bending driving mechanism. The bending driving mechanism comprises a fixed shaft fixed on the handle; the knob assembly is movably arranged on the fixing shaft in a sleeving mode and used for being connected with an insertion part of the endoscope, and the knob assembly is used for driving the insertion part to bend; the damping part is in contact with the knob assembly; and the locking assembly is arranged on the fixing shaft in a sleeving mode, and part of the locking assembly can move in the axial direction of the fixing shaft and extrude the damping part on the rotary knob assembly in the radial direction of the fixing shaft so that the rotating friction force of the rotary knob assembly can be increased. The insertion part can be suspended at a certain bending angle position, so that a doctor can observe, diagnose and treat conveniently, and the suspension angle of the insertion part can be finely adjusted.

Description

Technical Field

[0001] The present application belongs to the technical field of medical devices, and more specifically, to a bending drive mechanism, an endoscope, and an endoscope system. Background Art

[0002] In clinical practice, endoscopes are often used to examine patients in order to obtain high-definition images of pathological sites or extract tissues of pathological sites for clinical diagnosis through optical imaging, ultrasonic detection and other technologies. Endoscopes are mainly composed of a connection part, an operating part and an insertion part. The connection part is mainly used to connect to an external light source device, an ultrasonic processing unit, etc. The operating part is mainly used to control the extraction of the treatment instrument, the bending of the insertion part, etc., and the insertion part is used to insert into the human body for inspection.

[0003] The knob assembly of the operating part is an important component of the endoscope. The knob assembly is connected to the bending control assembly of the endoscope. The knob assembly is used to drive the bending control assembly to pull the insertion part to bend, thereby achieving the purpose of observing a specific part and cooperating with the corresponding instrument and light source for diagnosis and treatment. The knob component is a component operated by the doctor to drive the insertion part to bend in the body, serving as a power source. However, due to the structure of the insertion part and the knob assembly, the insertion part will rebound after being bent to a certain angle, making it impossible to hover at a certain angle for observation and diagnosis and treatment. Therefore, a locking mechanism that can lock the knob assembly in a certain position is required. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a bending drive mechanism, an endoscope and an endoscope system to solve the technical problem in the prior art that the insertion portion will rebound after being bent to a certain angle, resulting in the inability to hover at a certain angle for observation and diagnosis.

[0005] To achieve the above objectives, the technical solution adopted in this application is: in the first aspect, a bending drive mechanism is provided, comprising:

[0006] a fixed shaft configured to be fixed to a handle of the endoscope;

[0007] A knob assembly, movably sleeved on the fixed shaft and used to be connected to the insertion portion of the endoscope, the knob assembly being used to drive the insertion portion to bend;

[0008] A damping member, arranged in contact with the knob assembly;

[0009] The locking assembly is sleeved on the fixed shaft, and part of the locking assembly can move along the axial direction of the fixed shaft and press the damping member onto the knob assembly along the radial direction of the fixed shaft to increase the rotational friction of the knob assembly.

[0010] In a possible design, the locking assembly has a first abutting surface for abutting against the damping member, and the first abutting surface and the center line of the fixed shaft are arranged at an angle other than 90 degrees.

[0011] And / or, the damping member has a second abutting surface for abutting against the locking assembly, and the second abutting surface and the center line of the fixed shaft are arranged at an angle other than 90 degrees.

[0012] In a possible design, the locking assembly has a first abutting surface for abutting against the damping member, and the first abutting surface is a conical surface.

[0013] In one possible design, the locking assembly includes:

[0014] A locking member, wherein the locking member is sleeved on the fixed shaft; the locking member can move along the axial direction of the fixed shaft to squeeze the damping member along the radial direction of the fixed shaft;

[0015] A limit member is fixedly sleeved on the fixed shaft, and is used to lock the locking member in the axial direction after the locking member moves a preset stroke in the axial direction of the fixed shaft.

[0016] In a possible design, the limiting member and the locking member are axially locked by a rotational snap-fit ​​structure or a concave-convex matching structure.

[0017] In a possible design, the locking assembly further includes an elastic member, and the elastic member abuts between the limiting member and the locking member along the axial direction of the fixed shaft.

[0018] In a possible design, the damping element is a friction plate, a sealing gasket or an elastic structure.

[0019] In a possible design, a fixing sleeve is fixedly provided on the knob assembly, and the damping member is arranged in contact with the fixing sleeve.

[0020] In a possible design, lubricating sheets are respectively provided at positions where the knob assembly and the locking assembly abut against each other in the axial direction of the fixed shaft.

[0021] The beneficial effect of the bending drive mechanism provided by the present application is that: the bending drive mechanism provided by the embodiment of the present application increases the rotational friction of the knob assembly by moving the locking assembly along the axial direction of the fixed axis to squeeze the damping member along the radial direction of the fixed axis, so that the knob assembly can be locked at a certain position to ensure that the insertion part can hover at a certain bending angle position, which is convenient for doctors to observe and diagnose. And when it is necessary to fine-tune the hovering angle of the insertion part, the knob assembly can be rotated continuously to drive the insertion part to bend.

[0022] In a second aspect, the present application also provides an endoscope, comprising a connecting portion, an operating portion and an insertion portion, wherein the operating portion comprises a handle and a bending drive mechanism disposed on the handle.

[0023] The beneficial effect of the endoscope provided by the present application is that the endoscope provided by the embodiment of the present application, through the setting of the above-mentioned bending drive mechanism, enables the insertion portion of the endoscope to hover at a certain bending angle position, which is convenient for doctors to observe and diagnose and improve the success rate of the operation.

[0024] In a third aspect, the present application also provides an endoscope system, including an image processing device, a light source device, a display device, and the above-mentioned bending drive mechanism or the above-mentioned endoscope.

[0025] The beneficial effect of the endoscope system provided by the present application is that: the endoscope system provided by the embodiment of the present application, through the setting of the above-mentioned bending drive mechanism, enables the insertion part of the endoscope system to hover at a certain bending angle position, which is convenient for doctors to observe and diagnose and improve the success rate of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative labor.

[0027] Figure 1 A schematic diagram of the structure of an endoscope provided in an embodiment of the present application;

[0028] Figure 2 A schematic diagram of the three-dimensional structure of a bending drive mechanism provided in an embodiment of the present application;

[0029] Figure 3 A schematic diagram of the exploded structure of the bending drive mechanism provided in an embodiment of the present application;

[0030] Figure 4 A cross-sectional schematic diagram of a bending drive mechanism provided in an embodiment of the present application in a free state;

[0031] Figure 5 for Figure 4 An enlarged schematic diagram of the knob assembly and the locking assembly corresponding to the middle bending drive mechanism;

[0032] Figure 6 for Figure 4 A schematic cross-sectional view of the middle bending drive mechanism along AA;

[0033] Figure 7 for Figure 4A schematic cross-sectional view of the middle bending drive mechanism along BB;

[0034] Figure 8 A cross-sectional schematic diagram of a bending drive mechanism provided in an embodiment of the present application in a locked state;

[0035] Fig. 9 for Figure 8 An enlarged schematic diagram of the knob assembly and the locking assembly corresponding to the middle bending drive mechanism;

[0036] Fig.10 for Figure 8 A schematic cross-sectional view of the middle bending drive mechanism along CC;

[0037] Fig.11 for Figure 3 A schematic diagram of the structure of the middle locking member;

[0038] Fig.12 for Figure 3 A schematic diagram of the structure of the middle limiter;

[0039] Fig.13 for Figure 8 Schematic diagram of the assembly cross-section of the locking member and the limiting member.

[0040] Among them, the reference numerals in the figure are:

[0041] 100, bending drive mechanism; 1, fixed axis; 11, first step surface; 2, knob assembly; 21, knob upper shell; 211, plug block; 212, arc groove; 22, knob lower shell; 221, plug hole; 23, installation cavity; 24, first assembly hole; 25, second assembly hole; 3, damping member; 4, locking assembly; 41, locking member; 411, locking part; 412, driving part; 413, first limiting part; 4131, slot; 414, first cavity; 415, first abutting surface; 42, limiting Positioning member; 421, second limiting portion; 4211, plug-in portion; 4212, stop portion; 422, second cavity; 423, baffle; 424, special-shaped hole; 43, elastic member; 44, locking nut; 46, rotating cap; 47, connecting member; 5, fixing sleeve; 51, bottom plate; 52, sleeve; 6, knob shaft; 7, first lubricating sheet; 8, second lubricating sheet; 200, connecting portion; 300, operating portion; 400, inserting portion; 410, flexible portion; 420, bending portion; 430, front end portion. DETAILED DESCRIPTION

[0042] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0043] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0044] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply 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 a limitation on the present application.

[0045] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0046] Doctors often use endoscopes in digestive tract inspection, respiratory tract inspection, treatment and surgery, etc. Endoscopes generally consist of three parts: a connection part 200, an operation part 300 and an insertion part 400. The connection part 200 is mainly used to connect with an external light source device, an ultrasonic processing unit, etc. The operation part 300 is mainly used to control the extraction of treatment instruments, the bending of the insertion part 400, etc. The insertion part 400 is used to be inserted into the human body for inspection.

[0047] The knob assembly and the bending control assembly of the operating part 300 are important components of the endoscope. Both the knob assembly and the bending control assembly are installed on the handle of the operating part 300. The knob assembly is connected to the bending control assembly. The knob assembly is used to drive the bending control assembly to move to pull the insertion part 400 to bend, thereby achieving the purpose of observing a specific part and cooperating with the corresponding instrument and light source for diagnosis and treatment. The knob component is a component operated by the doctor to drive the insertion part 400 to bend in the body, serving as a power source. However, due to the structure of the insertion part 400 and the knob assembly, the insertion part 400 will rebound after being bent to a certain angle, resulting in the inability to hover at a certain angle for observation and diagnosis and treatment. Therefore, a locking mechanism that can lock the knob assembly in a certain position is required.

[0048] To this end, an embodiment of the present application provides a bending drive mechanism 100, which can lock the knob assembly in a certain position so that the insertion portion 400 can hover at a certain angle for the doctor to observe and diagnose. At the same time, the bending drive mechanism 100 will not lock the knob assembly, so that the knob assembly can also be rotated under a large external force to fine-tune the bending angle of the insertion portion 400.

[0049] See also Figures 1 to 4 , the bending drive mechanism 100 provided in the embodiment of the present application is now described in detail.

[0050] The bending drive mechanism 100 includes a fixed shaft 1, a knob assembly 2, a damping member 3 and a locking assembly 4. The fixed shaft 1 is configured to be fixed on the handle of the endoscope; the knob assembly 2 is movably mounted on the fixed shaft 1 and used to be connected to the insertion portion 400 of the endoscope, and the knob assembly 2 is used to drive the insertion portion 400 of the endoscope to bend; the damping member 3 is arranged in contact with the knob assembly 2; the locking assembly 4 is mounted on the fixed shaft 1, and a part of the locking assembly 4 can move along the axial direction of the fixed shaft 1 to squeeze the damping member 3 on the knob assembly 2 along the radial direction of the fixed shaft 1 to increase the rotational friction of the knob assembly 2.

[0051] The fixed axis 1 is used as the central axis of the knob assembly 2 on the handle. The knob assembly 2 is rotated so that the knob assembly 2 can rotate around the fixed axis 1. The rotation of the knob assembly 2 can drive the bending control assembly of the endoscope to move, so that the insertion portion 400 of the endoscope is bent.

[0052] The damping member 3 is a structural member capable of increasing friction, for example, it may be a friction plate with a rough surface, or it may be an elastic structure that increases friction by deforming after being squeezed, wherein the elastic structure may be a seal such as silicone or rubber, or a compression spring or a butterfly spring.

[0053] During the process of inserting the insertion part 400 into the human body, the knob assembly 2 can be rotated to drive the bending control assembly to move and pull the insertion part 400 to bend, so as to achieve the purpose of observing a specific part and cooperating with the corresponding instrument and light source for diagnosis and treatment. When the insertion part 400 needs to be suspended at a certain bending angle for the doctor's observation and diagnosis and treatment, the locking assembly 4 can be driven by external force to move part of the axial direction of the fixed axis 1, so that the locking assembly 4 squeezes the damping member 3 on the knob assembly 2 along the radial direction of the fixed axis 1, thereby increasing the rotational friction of the knob assembly 2, so that the knob assembly 2 can be locked in a certain position to ensure that the insertion part 400 can be suspended at a certain bending angle. When it is necessary to fine-tune the hovering angle of the insertion part 400, the knob assembly 2 can be further rotated to drive the insertion part 400 to bend through the bending control assembly.

[0054] In the embodiment of the present application, the locking assembly 4 is moved axially along the fixed axis 1 to squeeze the damping member 3 onto the knob assembly 2 radially along the fixed axis 1 to increase the rotational friction of the knob assembly 2, so that the knob assembly 2 can be locked in a certain position to ensure that the insertion portion 400 can hover at a certain bending angle position, and when it is necessary to fine-tune the hovering angle of the insertion portion 400, the knob assembly 2 can continue to be rotated to drive the insertion portion 400 to bend.

[0055] In addition, in the present application, the damping member 3 is squeezed along the radial direction of the fixed axis 1 by moving part of the locking assembly 4 along the axial direction of the fixed axis 1. The ratio of the moving stroke of the locking assembly 4 to the squeezing stroke of the damping member 3 is set as the stroke conversion rate. The stroke conversion rate mainly involves the moving parts of the damping member 3 and the locking assembly 4, that is, the stroke conversion rate is mainly related to the axial processing accuracy and assembly accuracy of the moving parts of the damping member 3 and the locking assembly 4 along the fixed axis 1. The present application reduces the influence of the moving parts of the damping member 3 and the locking assembly 4 on the stroke conversion rate by distributing the moving parts of the damping member 3 and the locking assembly 4 along the radial direction of the fixed axis 1, improves the stroke conversion rate, reduces the machining accuracy requirements for the moving parts of the locking assembly 4 and the damping member 3 in the longitudinal direction, reduces the machining cost of the parts, and reduces the machining and manufacturing cost of the entire endoscope. At the same time, there is no need to use additional tooling to assist the assembly of the damping member 3 and the locking assembly 4, which simplifies the assembly process and assembly difficulty.

[0056] In fact, before adopting the above locking scheme, the inventor of the present application also considered distributing the moving part of the locking assembly 4 and the damping member 3 along the axial direction of the fixed shaft 1, and extruding the damping member 3 along the axial direction of the fixed shaft 1 by the locking assembly 4 so that the damping member 3 abuts against the knob assembly 2 along the axial direction. Since the locking assembly 4 and the damping member 3 are distributed along the axial direction of the fixed shaft 1 in this scheme, the processing errors and assembly errors of the locking assembly 4 and the damping member 3 will affect the actual extrusion stroke of the damping member 3. In addition, since the scheme needs to limit the rotation of the locking assembly 4 and also needs to lock and control the axial movement stroke of the locking assembly 4, the locking direction involves multiple parts distributed along the axial direction of the fixed shaft 1, resulting in that after the structure is assembled and formed, the sum of the processing errors and assembly errors of the multiple parts is greater than the axial movement stroke of the locking assembly 4. Therefore, after the installation is completed in actual application, the actual extrusion stroke of the damping member 3 often differs greatly from the theoretical stroke and is uncontrollable, which ultimately leads to the failure to achieve the locking effect.

[0057] In one embodiment, see Figure 5 , Figure 8 , Fig. 9 and Fig.11The locking assembly 4 has a first abutting surface 415, and the first abutting surface 415 and the center line of the fixed shaft 1 are set at an angle of non-90 degrees. The moving part of the locking assembly 4 moves along the axial direction of the fixed shaft 1, driving the first abutting surface 415 to press the damping member 3 along the radial direction of the fixed shaft 1. The first abutting surface 415 and the center line of the fixed shaft 1 are set at an angle of non-90 degrees. When the moving part of the locking assembly 4 moves along the axial direction of the fixed shaft 1, the first abutting surface 415 moves along the axial direction of the fixed shaft 1. When the first abutting surface 415 abuts against the damping member 3, the first abutting surface 415 will exert a force on the damping member 3 along the radial direction of the fixed shaft 1, so as to press the damping member 3 onto the knob assembly 2.

[0058] In one embodiment, see Fig.11 The first abutting surface 415 is a conical surface, and abuts against the inner wall of the damping member 3 through the conical surface to increase the rotational friction of the knob assembly 2. In other embodiments of the present application, a plurality of first abutting surfaces 415 spaced apart may be distributed in the circumferential direction of the locking assembly 4, and each first abutting surface 415 abuts against different positions of the damping member 3 along the circumferential direction.

[0059] In one embodiment, see Fig. 9 , the inner circumferential wall of the damping member 3 is a circumferential surface. When the moving part of the locking assembly 4 moves along the axial direction of the fixed shaft 1, the conical surface of the locking assembly 4 and the circumferential surface of the damping member 3 gradually abut against each other to abut the damping member 3 against the knob assembly 2. In other embodiments of the present application, when the radial dimension of the damping member 3 is large enough, a second abutting surface for abutting against the locking assembly 4 may also be provided on the damping member 3, and the second abutting surface is provided at an angle other than 90 degrees to the center line of the fixed shaft 1. Alternatively, the first abutting surface 415 and the second abutting surface may also be provided on the locking assembly 4 and the damping member 3, respectively, which is not the only limitation here.

[0060] In one embodiment, see Figure 5 The locking assembly 4 includes a locking member 41 and a limiting member 42; the locking member 41 is sleeved on the fixed shaft 1; the locking member 41 can move along the axial direction of the fixed shaft 1 to squeeze the damping member 3 along the radial direction of the fixed shaft 1; the limiting member 42 is fixedly sleeved on the fixed shaft 1, and the limiting member 42 is used to lock the locking member 41 along the axial direction after the locking member 41 moves a preset stroke along the axial direction of the fixed shaft 1, that is, the locking member 41 cannot be reset along the axial direction, so that the locking member 41 remains in an abutment state against the damping member 3, so that the knob assembly 2 maintains a large rotational friction force.

[0061] In one embodiment, the limiter 42 and the locking member 41 are axially locked by a rotating buckle structure. Specifically, after the locking member 41 moves along the fixed shaft 1 for a preset stroke in the axial direction, the locking member 41 is rotated in the positive direction to clamp the rotating buckle between the limiter 42 and the locking member 41, thereby limiting the axial movement of the locking member 41. When unlocking is required, the locking member 41 is rotated in the reverse direction to release the rotating buckle between the limiter 42 and the locking member 41, thereby resetting the locking member 41 in the axial direction.

[0062] In one embodiment, see Figure 6 , Figure 7 , Figure 10-13 The locking member 41 is formed with a first limiting portion 413, and a slot 4131 is formed on the first limiting portion 413; the limiting member 42 is formed with a second limiting portion 421, and the second limiting portion 421 includes a plug-in portion 4211 and a stopper portion 4212 connected to each other. When the locking member 41 is rotated forward to a preset position, the plug-in portion 4211 is inserted into the slot 4131 and forms an axial lock, and the stopper portion 4212 abuts against the first limiting portion 413 along the circumferential direction. When unlocking is required, the locking member 41 is rotated in the reverse direction, the stopper portion 4212 is disengaged from the first limiting portion 413, and the plug-in portion 4211 is disengaged from the slot 4131.

[0063] For details, please refer to Fig.13 The limiting member 42 and the locking member 41 are distributed along the axial direction of the fixed shaft 1, the locking member 41 has a first cavity 414 opening toward the limiting member 42, and the limiting member 42 has a second cavity 422 opening toward the locking member 41. The first limiting portion 413 is formed on the top inner wall of the locking member 41 facing the limiting member 42, and the slot 4131 is formed on one side of the first limiting portion 413 facing the top inner wall of the locking member 41. The second limiting portion 421 is formed on the inner wall of the limiting member 42, the plug-in portion 4211 is connected to the stop portion 4212 in an L-shape, the stop portion 4212 extends vertically along the inner wall of the limiting member 42, the plug-in portion 4211 extends circumferentially along the stop portion 4212 toward one end of the locking member 41, when the locking member 41 rotates, the plug-in portion 4211 is inserted into the slot 4131, and the stop portion 4212 stops on the surface of the first limiting portion 413.

[0064] In one embodiment, see Figure 6 and Figure 7 Two first limiting portions 413 symmetrically arranged along the circumferential direction are formed on the locking member 41, and two second limiting portions 421 symmetrically arranged along the circumferential direction are formed on the limiting member 42. When the locking member 41 is rotated to a preset position, the two first limiting portions 413 correspond to the two second limiting portions 421 for clamping and limiting.

[0065] Also, see Figure 6 and Figure 7 Two baffles 423 are also formed on the limiting member 42. The two baffles 423 and the two second limiting portions 421 are arranged in sequence along the circumferential direction. A second limiting portion 421 is provided between the two baffles 423, and a baffle 423 is provided between the two second limiting portions 421. In this way, the rotation angle of the locking member 41 can be limited by the two baffles 423, so that the locking member 41 can generally only rotate 90 degrees in the forward direction or 90 degrees in the reverse direction.

[0066] In other embodiments of the present application, the above-mentioned limiting member 42 and the locking member 41 can also form an axial lock through a convex-concave matching structure. For example, a protrusion is formed on the inner circumferential wall of the locking member 41, and a groove is formed on the outer circumferential wall of the limiting member 42. The protrusion and the groove match each other to axially lock the locking member 41.

[0067] In one embodiment, see Figure 5 and Fig. 9 The locking assembly 4 also includes an elastic member 43, which abuts between the limit member 42 and the locking member 41 along the axial direction of the fixed shaft 1. The setting of the elastic member 43, on the one hand, can support and abut the locking member 41 in a free state against the knob assembly 2 to ensure the assembly stability of the locking member 41; on the other hand, it can abut the locking member 41 in a locked state against the limit member 42 to ensure the assembly stability of the locking member 41; at the same time, it can also reset the locking member 41 from the locked state to the free state when the axial locking fit between the locking member 41 and the limit member 42 is cancelled. It can be understood that in other embodiments of the present application, the locking member 41 can also be reset manually. At this time, a matching portion can be provided on the limit member 42 and the knob assembly 2 to ensure the assembly stability of the locking member 41, such as a concave-convex fit.

[0068] Optionally, the elastic member 43 is a compression spring or a spring.

[0069] In one embodiment, see Figure 5 and Fig.12 The stopper 42 is sleeved on the fixed shaft 1, and a special-shaped hole 424 is formed at the bottom center of the stopper 42. The axial position of the fixed shaft 1 corresponding to the stopper 42 is also special-shaped. When the stopper 42 is sleeved on the fixed shaft 1, the stopper 42 is restricted from rotating by the fixed shaft 1. The special-shaped hole 424 can be a square hole, a polygonal hole, or at least one plane is formed on the inner wall of a circular hole.

[0070] Also, see Figure 5A first step surface 11 is formed on the fixed shaft 1, and the side of the stopper 42 facing away from the locking member 41 abuts against the first step surface 11. A locking nut 44 is also sleeved on the fixed shaft 1, and the locking nut 44 is threadedly connected to the fixed shaft 1. The locking nut 44 is used to abut against the side of the stopper 42 facing the locking member 41, so as to lock and fix the stopper 42 on the fixed shaft 1.

[0071] In one embodiment, see Figure 5 The damping member 3 is a friction plate, and the damping member 3 is annular. The damping member 3 is sleeved on the inner circumferential wall of the knob assembly 2. The locking member 41 is used to abut against the inner circumferential wall of the damping member 3 to abut the damping member 3 against the inner circumferential wall of the knob assembly 2 along the radial direction of the fixed shaft 1, thereby increasing the rotational friction of the knob assembly 2.

[0072] The friction plate is an annular sheet structure with roughened inner and outer surfaces, and the friction plate is abutted between the locking member 41 and the knob assembly 2, thereby increasing the rotational friction of the knob assembly 2. It can be understood that in other embodiments of the present application, the damping member 3 may also be a sealing pad, and the friction is increased by squeezing the sealing pad; or the damping member 3 may also be an elastic structure, such as a cylindrical spring or a butterfly spring.

[0073] In one embodiment, see Figure 5 A mounting cavity 23 is formed at the center of the knob assembly 2, the fixed shaft 1 is arranged through the mounting cavity 23, the friction plate is arranged in the mounting cavity 23, and the outer peripheral wall of the friction plate is in contact with the inner peripheral wall of the mounting cavity 23, the locking member 41 at least partially extends into the mounting cavity 23 and is inserted into the friction plate, the outer peripheral wall of the locking member 41 is a conical surface, and the outer peripheral wall of the locking member 41 is in interference contact with the inner peripheral wall of the friction plate.

[0074] In one embodiment, see Figure 5 and Fig. 9 The knob assembly 2 is provided with a fixed sleeve 5, and the damping member 3 is arranged in contact with the fixed sleeve 5. The fixed sleeve 5 is arranged on the knob assembly 2, so that the rotational friction of the knob assembly 2 can be increased by the radial abutment between the damping member 3 and the fixed sleeve 5. On the one hand, it is convenient to replace the fixed sleeve 5 damaged by friction to increase the service life of the entire bending drive mechanism 100, and on the other hand, the rotational friction of the knob assembly 2 can be increased by increasing the roughness of the surface of the fixed sleeve 5.

[0075] In one embodiment, see Figure 5 The fixed sleeve 5 includes a bottom plate 51 and a sleeve 52. The sleeve 52 is integrally formed on a peripheral edge of the bottom plate 51. The bottom plate 51 is fitted with the bottom wall of the mounting cavity 23. The sleeve 52 is sleeved on the inner wall of the mounting cavity 23. The friction plate is sleeved in the sleeve 52. The bottom end of the friction plate abuts against the bottom plate 51.

[0076] In one embodiment, the fixing sleeve 5 is fixed to the knob assembly 2 by gluing to ensure that the fixing sleeve 5 is firmly connected to the knob assembly 2. In other embodiments of the present application, the fixing sleeve 5 can also be fixed to the knob assembly 2 by screw locking, clamping, welding or other methods, which are not limited here.

[0077] In one embodiment, see Figure 5 and Figure 6 The knob assembly 2 includes a knob upper shell 21 and a knob lower shell 22, which are relatively sleeved and enclosed together to form the above-mentioned installation cavity 23. A plurality of plug blocks 211 are formed in the knob upper shell 21, and a plurality of plug holes 221 are formed in the knob lower shell 22. When the knob upper shell 21 and the knob lower shell 22 are sleeved with each other, each plug block 211 is correspondingly inserted into each plug hole 221, thereby forming a rotational positioning between the knob lower shell 22 and the knob upper shell 21. At the same time, the knob upper shell 21 and the knob lower shell 22 are also fixedly connected by gluing, ensuring that the knob upper shell 21 and the knob lower shell 22 can rotate synchronously. In addition, in this embodiment, the knob assembly 2 is divided into a knob upper shell 21 and a knob lower shell 22, which is convenient for the installation of structures such as the fixing sleeve 5, the damping member 3 and the locking member 41. It can be understood that in other embodiments of the present application, the knob upper shell 21 and the knob lower shell 22 can also be fixed as a whole by screw locking, snap connection, interference fit or welding, which is not the only limitation here.

[0078] See also Figure 6 The outer wall of the knob upper shell 21 is formed with a plurality of arc grooves 212 distributed along the circumferential direction, and the arrangement of each arc groove 212 facilitates the doctor to hold. The outer wall of the knob lower shell 22 is adapted to the shape of the outer peripheral wall of the knob upper shell 21, and the inner peripheral wall of the knob lower shell 22 is a cylindrical wall, so as to facilitate the installation of the fixing sleeve 5 and the damping member 3.

[0079] In one embodiment, see Figures 3 to 5 The bending drive mechanism 100 also includes a knob shaft 6, which is sleeved on the fixed shaft 1, and the knob shaft 6 is fixedly connected to the bottom of the knob lower shell 22. The end of the knob shaft 6 away from the knob lower shell 22 is used to connect with the bending control component to realize the driving control of the bending control component by the knob component 2.

[0080] Optionally, the knob shaft 6 and the knob lower shell 22 can be fixed as a whole by gluing, thread locking, snap connection, interference fit or welding.

[0081] In one embodiment, see Figure 5The top center and the bottom center of the knob assembly 2 are respectively formed with a first assembly hole 24 and a second assembly hole 25 communicating with the mounting cavity 23, and the fixed shaft 1 is respectively arranged through the first assembly hole 24 and the second assembly hole 25. The locking member 41 is sleeved on the fixed shaft 1, and the locking member 41 is arranged through the first assembly hole 24. The locking member 41 includes a locking portion 411 and a driving portion 412 connected in the axial direction, the locking portion 411 is arranged through the first assembly hole 24, the driving portion 412 is arranged in the mounting cavity 23 and is integrally connected with the locking portion 411, and a first abutting surface 415 is formed on the driving portion 412, and the other end of the locking portion 411 extends out of the first assembly hole 24, and the other end of the locking portion 411 is connected to a rotating cap 46, and the rotating cap 46 is driven externally to drive the locking member 41 to move axially or rotate around the axial direction.

[0082] See also Figure 5 A connecting piece 47 is connected between the rotating cap 46 and the locking part 411. The connecting piece 47 is fixedly connected to the rotating cap 46, and the connecting piece 47 is detachably connected to the locking part 411. A gripping portion for the doctor to hold is formed on the surface of the rotating cap 46. The rotating cap 46 and the connecting piece 47 are separated, which can reduce the difficulty of processing the rotating cap 46, and the connecting piece 47 is detachably connected to the locking part 411, which facilitates the installation of the locking piece 41 in the knob assembly 2.

[0083] The connection piece 47 and the locking portion 411 are threadedly connected, and the rotation cap 46 and the connection piece 47 are bonded.

[0084] In one embodiment, see Figure 5 Lubricating sheets are respectively provided at the positions where the knob assembly 2 and the locking assembly 4 abut against each other along the axial direction of the fixed shaft 1. The provision of the lubricating sheets can reduce the rotation resistance of the knob assembly 2.

[0085] In one embodiment, see Figure 5 The first lubricating sheet 7 is provided at the position where the knob assembly 2 and the locking member 41 abut against each other in the axial direction. The locking member 41 in the free state abuts against the knob assembly 2 in the axial direction of the fixed shaft 1. The provision of the first lubricating sheet 7 reduces the rotation resistance of the knob assembly 2 in the free state.

[0086] Likewise, see Figure 5 A second lubricating sheet 8 is in contact between the knob assembly 2 and the limiting member 42 . The second lubricating sheet 8 is used to reduce the friction between the knob assembly 2 and the limiting member 42 , so as to facilitate the rotation of the knob assembly 2 .

[0087] Second, see Figure 1The present application also provides an endoscope, including a connecting portion 200, an operating portion 300 and an insertion portion 400. The operating portion 300 includes a handle and the above-mentioned bending drive mechanism 100 and a bending control assembly arranged on the handle. The bending drive mechanism 100 is installed on the handle, and the bending control assembly is at least partially installed on the handle. The bending control assembly is connected to the bending drive mechanism 100. The insertion portion 400 includes a flexible portion 410, a bending portion 420 and a front end portion 430 connected in sequence. The bending control assembly is also connected to the bending portion 420 of the insertion portion 400. The bending drive mechanism 100 drives the bending control assembly to bend the bending portion 420.

[0088] In a third aspect, the present application also provides an endoscope system, including an image processing device, a light source device, a display device, and an endoscope. The light source device is used to provide a light source for the light source component in the endoscope to ensure that the endoscope can obtain images of the lesion site of the human body, the image processing device is connected to the imaging component in the endoscope, the image processing device is used to receive the image information transmitted by the imaging component and process the image information, the display device is connected to the image processing device, and the display device is used to display the processed image for the doctor to observe and assist the operation.

[0089] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A bending drive mechanism (100), characterized in that: include: A fixed shaft (1) configured to be fixed to a handle of an endoscope; A knob assembly (2) is movably sleeved on the fixed shaft (1) and is used to be connected to the insertion portion (400) of the endoscope, and the knob assembly (2) is used to drive the insertion portion (400) to bend; A damping member (3) is arranged in contact with the knob assembly (2); A locking assembly (4), wherein the locking assembly (4) is sleeved on the fixed shaft (1), and a portion of the locking assembly (4) is capable of moving along the axial direction of the fixed shaft (1) and pressing the damping member (3) onto the knob assembly (2) along the radial direction of the fixed shaft (1) to increase the rotational friction of the knob assembly (2).

2. The bending drive mechanism (100) according to claim 1, characterized in that: The locking assembly (4) has a first abutting surface (410) for abutting against the damping element (3), and the first abutting surface (410) and the center line of the fixed shaft (1) are arranged at an angle other than 90 degrees. And / or, the damping member (3) has a second abutting surface for abutting against the locking assembly (4), and the second abutting surface and the center line of the fixed shaft (1) are arranged at an angle other than 90 degrees.

3. The bending drive mechanism (100) according to claim 1, characterized in that: The locking assembly (4) has a first abutting surface (410) for abutting against the damping member (3), and the first abutting surface (410) is a conical surface.

4. The bending drive mechanism (100) according to claim 1, characterized in that: The locking assembly (4) comprises: A locking member (41), wherein the locking member (41) is sleeved on the fixed shaft (1); the locking member (41) is capable of moving along the axial direction of the fixed shaft (1) to press the damping member (3) along the radial direction of the fixed shaft (1); A limit member (42), the limit member (42) being fixedly sleeved on the fixed shaft (1), the limit member (42) being used to lock the locking member (41) in the axial direction after the locking member (41) moves a preset stroke in the axial direction of the fixed shaft (1).

5. The bending drive mechanism (100) according to claim 4, characterized in that: Axial locking is achieved between the limiting member (42) and the locking member (41) through a rotating buckle structure or a concave-convex matching structure.

6. The bending drive mechanism according to claim 4, characterized in that: The locking assembly (4) further comprises an elastic member (43), wherein the elastic member (43) abuts between the limiting member (42) and the locking member (41) along the axial direction of the fixed shaft (1).

7. The bending drive mechanism (100) according to any one of claims 1 to 6, characterized in that: The damping element (3) is a friction plate, a sealing pad or an elastic structure.

8. The bending drive mechanism (100) according to any one of claims 1 to 6, characterized in that: A fixing sleeve (5) is fixedly provided on the knob assembly (2), and the damping member (3) is arranged in contact with the fixing sleeve (5).

9. The bending drive mechanism (100) according to any one of claims 1 to 6, characterized in that: Lubricating sheets are respectively provided at positions where the knob assembly (2) and the locking assembly (4) abut against each other along the axial direction of the fixed shaft (1).

10. An endoscope, characterized in that: It comprises a connecting portion (200), an operating portion (300) and an inserting portion (400), wherein the operating portion (300) comprises a handle and a bending drive mechanism (100) according to any one of claims 1 to 9 arranged on the handle. 11 . An endoscope system comprising an image processing device, a light source device, a display device, and the endoscope according to claim 10 .

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