Bending angle adjusting device and endoscope

Abstract

The utility model discloses a bending angle adjusting device and an endoscope, and relates to the technical field of medical instruments. The bending angle adjusting device specifically comprises a main frame plate; the transmission assembly comprises a driving part which is connected to the main frame plate and is used for driving a traction wire arranged at the head end of the endoscope to contract or extend so as to enable the head end of the endoscope to deflect; when the limiting plate is connected to the main frame plate in a buckled mode, the limiting plate covers the transmission assembly so that the transmission assembly can move according to the limited position. The structure design of the bending angle adjusting mechanism is optimized, so that the bending angle adjusting mechanism is easier to disassemble and assemble and higher in reliability.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and particularly relates to a bending angle adjusting device and an endoscope. Background Art

[0002] As an important medical device, the endoscope is widely used in multiple fields such as internal medicine, surgery, and gynecology for diagnosing and treating various diseases in the human body. In the structure of the endoscope, the bending angle adjustment mechanism is a key component, and its function is to control the bending angle of the front end of the endoscope, so as to achieve precise observation and operation of the target area.

[0003] The existing bending angle adjustment mechanisms usually adopt multi-stage transmission and chain structures. Although these structures can achieve precise angle adjustment, their complexity directly leads to an increase in the number of components. For example, a typical bending angle adjustment mechanism includes a main frame, a chain, a sprocket, a chain cover plate, a buckle, screws and other components, and these components need to be fixed and connected through precise assembly processes.

[0004] Due to the structural complexity, when disassembling and assembling the existing bending angle adjustment mechanism, it is necessary to remove multiple levels of components one by one. For example, if it is necessary to replace the components at the bottom layer, the operator must first remove the components at the top layer before being able to replace the components at the bottom layer. This disassembly and assembly method not only takes time and effort, but also requires the operator to have high skills and experience. Otherwise, it is easy to cause damage to the components and even affect the normal operation of the whole machine.

[0005] Therefore, how to optimize the structural design of the bending angle adjustment mechanism to make it have simpler disassembly and assembly and higher reliability has become an urgent technical problem to be solved. Summary of the Utility Model

[0006] The main purpose of the utility model is to provide a bending angle adjusting device and an endoscope, aiming to optimize the structural design of the bending angle adjustment mechanism to make it have simpler disassembly and assembly and higher reliability.

[0007] To achieve the above purpose, the utility model provides a bending angle adjusting device, comprising:

[0008] A main frame plate;

[0009] At least one transmission component, and the transmission component comprises:

[0010] A driving part, connected to the main frame plate, for driving the traction wire arranged at the front end of the endoscope to contract or extend, so as to deflect the front end of the endoscope; and

[0011] A limiting plate, when the limiting plate is snap-connected to the main frame plate, the limiting plate covers the transmission component so that the transmission component moves in a limited position.

[0012] In an embodiment of the present application, the driving part includes:

[0013] A sprocket, one end of which is installed on the main frame plate and can rotate relative to the main frame plate;

[0014] A chain, meshed with the sprocket and capable of generating displacement as the sprocket rotates;

[0015] The traction wire is connected to the chain and can contract or extend with the chain. The limiting plate is provided with a cavity for restricting the movement of the chain in a predetermined position.

[0016] In an embodiment of the present application, traction wire fixing parts are installed at both free ends of the chain, and the traction wire is connected to the traction wire fixing parts.

[0017] In an embodiment of the present application, the traction wire fixing part includes:

[0018] A base, one end of the base is provided with a connecting part that can be hinged to the chain, and at least two opposite vertical plates are provided on the base to form a limiting space, and a limiting space is formed between the two vertical plates; and

[0019] A limiting column, when the traction wire is installed in the limiting space, the limiting column is inserted into the limiting space to lock the traction wire.

[0020] In an embodiment of the present application, the main frame plate is provided with at least one set of limiting hole groups composed of a plurality of limiting holes arranged linearly; when there are two sets of limiting hole groups, one limiting hole group is located on one side of the first free end of the chain, and the other limiting hole group is located on the other side of the second free end of the chain. The limiting holes in the limiting hole group can be installed with limiting parts for restricting the retraction distance of the traction wire fixing part.

[0021] In an embodiment of the present application, the length direction of the straight line where each limiting hole in the limiting hole group is located is parallel to the length direction of the corresponding chain.

[0022] In an embodiment of the present application, the limiting plate includes:

[0023] A main body part, covering the chain, the cavity is arranged on the main body part, the main body part is provided with a through hole for avoiding the sprocket, and a positioning part for facilitating the positioning and installation of the main body part is arranged on the inner side wall of the through hole; and

[0024] A sprocket cover, covering the sprocket.

[0025] In an embodiment of the present application, when the sprocket cover is disposed on the sprocket, the sprocket cover is pressed onto the main body portion.

[0026] In an embodiment of the present application, the limiting plate is further provided with screw holes through which screws pass to lock the limiting plate to the main frame plate.

[0027] The present application also discloses an endoscope, including a handle, a bending portion, a traction wire connecting the handle and the bending portion, and the bending angle adjusting device as described in any one of the above.

[0028] With the above technical solutions, the main frame plate and the limiting plate are connected by a snap structure, enabling quick disassembly and assembly without the need for complex tools. This greatly facilitates daily maintenance and component replacement, improving work efficiency. The design of the limiting plate not only protects the transmission components but also directionally limits their movement, ensuring that the transmission components move along a preset trajectory, enhancing the accuracy and stability of the bending operation at the distal end of the endoscope. The design is simple, and the disassembly and assembly of the transmission components and the limiting plate are convenient, reducing the dependence on professional technicians and equipment and lowering the maintenance cost. At the same time, long-service-life materials also reduce the replacement frequency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The following will describe the present invention in detail with reference to specific embodiments and the accompanying drawings, where:

[0030] Figure 1 is an exploded structural schematic diagram of the first embodiment of the present invention;

[0031] 10. Main frame plate; 21. Limiting plate; 22. Sprocket cover; 211. Alignment member; 31. Sprocket; 32. Chain; 41. Base; 42. Vertical plate; 43. Limiting column; 44. Connecting portion; 50. Limiting member. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] In order to make the objectives, technical solutions and advantages of the present invention clearer, the following will describe the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the following specific embodiments are only used to explain the present invention and do not constitute a limitation to the present invention.

[0033] As Figure 1 shown, to achieve the above object, the present invention provides a bending angle adjusting device, including:

[0034] Main frame plate 10;

[0035] At least one transmission component, the transmission component including:

[0036] A driving part, connected to the main frame plate 10, is used to drive the traction wire arranged at the end of the endoscope lens to contract or extend, so as to deflect the end of the endoscope lens; and

[0037] A limiting plate 21, when the limiting plate 21 is snap-connected to the main frame plate 10, the limiting plate 21 covers the transmission assembly, so that the transmission assembly moves in a limited position.

[0038] Specifically, the main frame plate 10 is the basic support structure of the entire bending angle adjustment device. Its shape is flat and it is made of high-strength materials, such as aluminum alloy materials, alloy steel materials, etc., to ensure its stability and reliability under complex operating conditions. Multiple mounting holes and through holes are arranged on the main frame plate 10 for fixing and connecting other components, such as the driving part, the limiting plate 21, etc.

[0039] The transmission assembly includes two main sub-components: a driving part and a traction wire.

[0040] The driving part is installed on one side of the main frame plate 10. It is connected to the traction wire arranged at the end of the endoscope lens through a transmission shaft, a gear or a chain 32, etc. The main function of the driving part is to control the contraction or extension of the traction wire through rotational or linear motion, so as to enable the end of the endoscope lens to achieve the required bending angle. The driving part can be driven by a motor, a manual knob or a pneumatic system, and is selected according to actual usage requirements. Here, it will not be limited one by one.

[0041] The traction wire is connected to the output end of the driving part, and the other end is fixed at the end of the endoscope lens. The traction wire is made of high-strength and wear-resistant materials, such as stainless steel ropes or high-strength fibers. Its main function is to control the bending angle of the end of the endoscope lens through the movement of the driving part. The traction wire is provided with a specified guiding path on the main frame plate 10 to ensure that it remains smooth during movement and does not get entangled or knotted.

[0042] The limiting plate 21 is a plate-like structure, and its material also has high strength and wear resistance characteristics. The limiting plate 21 is connected to the main frame plate 10 through a snap structure. The snap structure includes multiple snap holes and protruding parts. When the limiting plate 21 is connected to the main frame plate 10, the protruding parts are embedded in the snap holes to form a tight fixation. The design of the snap structure ensures that the limiting plate 21 can be firmly fixed on the main frame plate 10 and is convenient for disassembly and assembly. When the limiting plate 21 is snap-connected to the main frame plate 10, it covers the driving part to form a protective cover to prevent foreign objects from entering the driving part and affecting its normal operation. At the same time, the limiting plate 21 also has the function of directionally restricting the movement path of the driving part to ensure that the driving part operates along the specified path and position, and to avoid affecting the bending accuracy of the end of the endoscope lens due to the deviation of the movement trajectory.

[0043] With the above technical solution, the main frame plate 10 and the limit plate 21 are connected by a snap structure, enabling quick disassembly and assembly without the use of complex tools. This greatly facilitates daily maintenance and component replacement, improving work efficiency. The design of the limit plate 21 not only protects the driving part but also directionally restricts its movement, ensuring that the driving part moves along a preset trajectory and enhancing the accuracy and stability of the bending operation at the end of the endoscope lens.

[0044] In an embodiment of the present application, the driving part includes:

[0045] A sprocket 31, one end of which is mounted on the main frame plate 10 and can rotate relative to the main frame plate 10;

[0046] A chain 32, meshing with the sprocket 31 and capable of generating displacement as the sprocket 31 rotates;

[0047] The traction wire is connected to the chain 32 and can contract or extend with the chain 32. The limit plate 21 is provided with a cavity for restricting the movement of the chain 32 to a predetermined position.

[0048] Specifically, the driving part includes a sprocket 31, a chain 32 and a traction wire.

[0049] One end of the sprocket 31 is fixedly mounted on the main frame plate 10 and uses a bearing or a similar structure to ensure that the sprocket 31 can freely rotate relative to the main frame plate 10. The sprocket 31 is provided with a plurality of teeth for meshing with the chain 32. The size and number of teeth of the sprocket 31 need to be precisely designed according to the specifications of the chain 32 to ensure the stability and smoothness of the meshing. Since it is prior art, it will not be elaborated here one by one. The other end of the sprocket 31 is connected to a drive control device, such as a motor or a manual knob. When the drive control device is started, the sprocket 31 can drive the chain 32 to perform a rotational motion.

[0050] The traction wire is connected to the chain 32. One end of it is connected to the chain 32, and the other end is directly connected to the end of the endoscope lens. Through the movement of the chain 32, the traction wire can achieve telescopic changes, thereby driving the bending and straightening of the end of the endoscope lens.

[0051] The limit plate 21 is provided with a cavity, which is a guiding groove for the chain 32 to pass through. Its shape and size match the movement trajectory of the chain 32. The depth and width of the cavity are designed according to the specifications of the chain 32 to ensure that the chain 32 can move freely in the cavity without jamming or deviation. The material of the cavity is usually made of wear-resistant material to increase its service life.

[0052] With the above technical solution, the sprocket 31 and the chain 32 mesh with each other to ensure the stability and reliability of the transmission. The cavity design of the limit plate 21 precisely restricts the movement path of the chain 32, preventing deviation or derailment. The limit plate 21 is fixed by a snap structure, which is convenient for disassembly and assembly, greatly facilitating daily maintenance and reducing operation complexity and time costs.

[0053] In an embodiment of the present application, traction wire fixing members are installed at both free ends of the chain 32, and the traction wire is connected to the traction wire fixing members.

[0054] With the above technical solution, by setting the traction wire fixing members, the traction wire is firmly fixed to ensure that it will not loosen or fall off during operation. The stable fixation can ensure that the transmission components can still work properly under high load or long-term use, greatly improving the reliability of the equipment. If the traction wire is directly connected to the sprocket 31 or other moving parts, it will be worn due to frequent pulling and friction. The fixing members can isolate the traction wire from components such as the sprocket 31, reducing direct friction, thereby extending the service life of the traction wire and other moving parts.

[0055] In an embodiment of the present application, the traction wire fixing member includes:

[0056] A base 41, one end of the base 41 is provided with a connecting portion 44 that can be hinged to the chain 32, and at least two opposite vertical plates 42 are provided on the base 41 to form a limiting space therebetween; and

[0057] A limiting post 43, when the traction wire is installed in the limiting space, the limiting post 43 is inserted into the limiting space to lock the traction wire.

[0058] Specifically, the traction wire fixing member is composed of three main components: the base 41, the vertical plates 42, and the limiting post 43. Among them, the base 41 is a long strip-shaped platform to provide stable support. One end of the base 41 is provided with a connecting portion 44 that can be hinged to the chain 32, and the connecting portion 44 is a hinge to ensure that the base 41 can be flexibly connected to the chain 32 and rotate freely within a certain range. In this way, the base 41 can adapt to the movement of the chain 32 while keeping itself and the traction wire in place.

[0059] On both sides of the base 41, two opposite vertical plates 42 are provided, and the two vertical plates 42 are vertically fixed on the base 41 to form a limiting space. The distance between the two vertical plates 42 is determined according to the diameter of the traction wire to ensure that the traction wire can be smoothly installed and locked, while avoiding excessive gaps that may cause the traction wire to loosen or shift.

[0060] The limit post 43 is long and cylindrical, and the material is selected from high-strength metals or synthetic materials. The limit post is a set screw or a locking screw. When installing the traction wire, place the traction wire in the limit space formed by the base 41 and the two vertical plates 42, and then vertically insert the limit post 43 into the limit space to firmly lock the traction wire.

[0061] With the above technical solution, the mutual cooperation of the base 41, the vertical plates 42 and the limit post 43 can effectively fix the traction wire firmly in the limit space, ensuring that the traction wire can still remain stable and not loosen or fall off under high load or long-term use. The base 41 is hinged to the chain 32, enabling the traction wire fixing member to flexibly adapt to the movement of the chain 32. No matter how the chain 32 rotates or moves, the base 41 always maintains an ideal connection state, avoiding additional stress and displacement caused by the movement of the chain 32. By setting a limit space between the vertical plates 42 and adopting the locking design of the limit post 43, the installation and disassembly of the traction wire become very convenient. The operator only needs to place the traction wire in the limit space and then insert the limit post 43 to complete the installation, greatly simplifying the operation process.

[0062] In an embodiment of the present application, the main frame plate 10 is provided with at least one set of limit hole groups formed by linearly arranging a plurality of limit holes; when there are two sets of limit hole groups, one set of limit hole groups is located on one side of the first free end of the chain 32, and the other set of limit hole groups is located on one side of the second free end of the chain 32. The limit holes in the limit hole groups can install limit members 50 for restricting the retraction distance of the traction wire fixing member.

[0063] Specifically, the limit hole group is formed by linearly arranging a plurality of limit holes. Each limit hole group usually consists of a plurality of holes spaced a certain distance apart. The arrangement of these holes can be a straight line arrangement, a rectangular arrangement or other geometric shape arrangements. The design of the limit hole group is aimed at providing multiple position options to adjust the retraction distance of the traction wire fixing member according to actual needs.

[0064] When there is only one set of limit hole groups on the main frame plate 10, this set of limit hole groups is arranged on one side of one of the free ends of the chain 32.

[0065] When there are two sets of limit hole groups on the main frame plate 10, one set of limit hole groups is located on one side of the first free end of the chain 32, and the other set of limit hole groups is located on one side of the second free end of the chain 32. This ensures the flexibility of position adjustment of the traction wire fixing member at both free ends.

[0066] The limit member 50 is installed by fixing it in a certain limit hole in the limit hole group, thereby restricting the movement range of the traction wire fixing member.

[0067] With the above technical solution, the limiting hole group is composed of a plurality of limiting holes arranged linearly, providing a variety of position options and facilitating the adjustment of the retraction distance of the traction wire fixing member according to different usage requirements. The design allows the operator to install the limiting member 50 at different positions, so as to achieve the purpose of accurately controlling the displacement of the traction wire fixing member.

[0068] In an embodiment of the present application, the length direction of the straight line where each limiting hole in the limiting hole group is located is parallel to the length direction of the corresponding chain 32.

[0069] Specifically, when the straight line where each limiting hole in the limiting hole group is located is parallel to the length direction of the chain 32, the limiting member 50 can more accurately limit the retraction distance of the traction wire fixing member, ensuring the stability and controllability of the device during use.

[0070] In an embodiment of the present application, the limiting plate 21 includes:

[0071] A main body portion covering the chain 32, the cavity is provided on the main body portion, a through hole for avoiding the sprocket 31 is provided on the main body portion, and a positioning member 211 for facilitating the alignment installation of the main body portion is provided on the inner side wall of the through hole; and

[0072] A sprocket 31 cover 22 covering the sprocket 31.

[0073] Specifically, the main body portion directly covers the upper part of the chain 32, playing a role in protecting and restricting the movement of the chain 32. The width and length of the main body portion need to be customized according to the specifications of the chain 32 to ensure that it completely covers the chain 32. A cavity is provided on the main body portion, and the cavity is for the chain 32 to pass through. The cavity design accurately restricts the movement path of the chain 32, avoiding deviation or derailment.

[0074] A through hole for avoiding the sprocket 31 is provided on the main body portion to ensure that the sprocket 31 can operate normally without being hindered by the main body portion. A positioning member 211 is provided on the inner side wall of the through hole, and the positioning member 211 is used to help the main body portion accurately align during installation. The positioning member 211 can be a small protrusion or groove.

[0075] The sprocket 31 cover 22 directly covers the upper part of the sprocket 31, providing additional protection and support.

[0076] With the above technical solution, the alignment member 211 on the main body ensures accurate alignment during installation, avoiding installation deviation and improving the stability and accuracy of the system. By effectively covering and restricting the chain 32 and the sprocket 31, the error caused by small displacements is reduced, ensuring that the adjusting device operates more precisely and reliably. The limiting plate 21, through the design of the main body and the sprocket 31 cover 22, provides comprehensive protection for the chain 32 and the sprocket 31, preventing damage caused by the external environment, such as dust and foreign objects entering, thereby extending the service life of the chain 32 and the sprocket 31.

[0077] In an embodiment of the present application, when the sprocket 31 cover 22 is disposed on the sprocket 31, the sprocket 31 cover 22 is pressed against the main body.

[0078] With the above technical solution, through the pressing action of the sprocket 31 cover 22, the position of the main body is further fixed, preventing it from loosening or detaching during operation, and ensuring the stable operation of the chain 32 and the sprocket 31.

[0079] In an embodiment of the present application, the limiting plate 21 is further provided with a screw hole for a screw to pass through to lock the limiting plate 21 on the main frame plate 10.

[0080] With the above technical solution, since the limiting plate 21 is connected to the main frame plate 10 by a buckle, by providing a screw hole on the limiting plate 21 and then fixing the limiting plate 21 on the main frame plate 10 through a screw passing through the screw hole, the stability of the limiting plate 21 is further improved.

[0081] The present application also discloses an endoscope, including a handle, a bending portion, a traction wire connecting the handle and the bending portion, and a bending angle adjusting device as described in any one of the above.

[0082] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A bending angle adjustment device, characterized in that: include: Main frame plate; At least one transmission assembly, the transmission assembly comprising: A driving unit connected to the main frame plate and used to drive the traction wire disposed at the end of the endoscope head to contract or extend so as to deflect the end of the endoscope head; and A limit plate, when the limit plate is buckled and connected to the main frame plate, the limit plate cover is arranged on the transmission assembly to enable the transmission assembly to move according to a limited position.

2. The bending angle adjustment device according to claim 1, characterized in that: The driving unit comprises: A sprocket, one end of which is mounted on the main frame plate and can rotate relative to the main frame plate; A chain, meshed with the sprocket and capable of being displaced as the sprocket rotates; The traction wire is connected to the chain and can shrink or extend along with the chain. The limiting plate is provided with a cavity for limiting the movement of the chain to a predetermined position.

3. The bending angle adjustment device according to claim 2, characterized in that: Both free ends of the chain are equipped with traction wire fixings, and the traction wire is connected to the traction wire fixings.

4. The bending angle adjustment device according to claim 3, characterized in that: The traction wire fixing member comprises: A base, one end of which is provided with a connection portion that can be hinged to the chain, and the base is provided with at least two vertical plates that are arranged opposite to each other to form a limiting space, and a limiting space is formed between the two vertical plates; and The limiting column is inserted into the limiting space when the traction wire is installed in the limiting space to lock the traction wire.

5. The bending angle adjustment device according to claim 3, characterized in that: The main frame plate is provided with at least one group of limit hole groups formed by a plurality of limit holes arranged linearly; when the limit hole groups are two groups, one of the limit hole groups is located on one side of the first free end of the chain, and the other limit hole group is located on one side of the second free end of the chain, and the limit holes in the limit hole groups can be installed with limit members for limiting the retraction distance of the traction wire fixing member.

6. The bending angle adjustment device according to claim 5, characterized in that: The length direction of the straight line where each of the limiting holes in the limiting hole group is located is parallel to the length direction of the chain corresponding thereto.

7. The bending angle adjustment device according to claim 2, characterized in that: The limiting plate comprises: A main body, a cover is arranged on the chain, the cavity is arranged on the main body, a through hole for avoiding the sprocket is arranged on the main body, and a positioning piece for facilitating the alignment installation of the main body is arranged on the inner side wall of the through hole; and A sprocket cover is arranged on the sprocket.

8. The bending angle adjustment device according to claim 7, characterized in that: When the sprocket cover is disposed on the sprocket, the sprocket cover is pressed onto the main body.

9. The bending angle adjustment device according to claim 1, characterized in that: The limiting plate is also provided with screw holes for screws to pass through so as to lock the limiting plate on the main frame plate.

10. An endoscope, characterized in that: It comprises a handle, a bending part, a traction wire connecting the handle and the bending part, and a bending angle adjustment device as claimed in any one of claims 1 to 9.

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