Angle locking device and endoscope

Abstract

In order to solve the problem that the locking force of the angle locking device of medical equipment is difficult to adjust, the present invention provides an angle locking device and an endoscope, the device comprising: a hub bracket, the side wall of which is provided with threads; an angle hub, hinged on the hub bracket; a friction gasket, abutting the angle hub; a friction force adjustment mechanism, connected to the friction gasket; an annular ring, abutting the friction force adjustment mechanism, the annular ring is threadedly connected to the hub bracket, and is used to adjust the pressure applied by the friction force adjustment mechanism on the friction gasket. An angle locking device of the present invention is provided with an annular ring and a hub bracket threaded connection, which can convert the rotational motion of the annular ring into the axial displacement of the annular ring by slowly rotating the annular ring, and can smoothly and evenly adjust the locking force of the friction force adjustment mechanism on the angle hub.

Description

Technical Field

[0001] The invention relates to medical instruments, and in particular to an angle locking device and an endoscope. Background Art

[0002] In the angle locking device, a friction force adjustment mechanism is often used to lock the angle hub so that the angle hub can no longer rotate. The locking force can be controlled by adjusting the distance between the friction force adjustment mechanism and the angle hub.

[0003] The existing angle locking device uses multiple screws to adjust the distance between the friction force adjustment mechanism and the angle hub, and the adjustment process is complicated; and it is difficult to ensure that the multiple screws are turned to the same degree, which will cause the locking force acting on the angle hub to be different, resulting in a poor locking effect of the angle locking device. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides an angle locking device that can smoothly and evenly adjust the locking force acting on the angle hub, and the adjustment process is simple and convenient.

[0005] According to an embodiment of the first aspect of the present invention, an angle locking device includes: a wheel hub bracket, whose side wall is provided with threads; an angle hub, hinged on the wheel hub bracket; a friction gasket, abutting the angle hub; a friction force adjustment mechanism, connected to the friction gasket; an annular ring, abutting the friction force adjustment mechanism, the annular ring is threadedly connected to the wheel hub bracket, and is used to adjust the pressure applied by the friction force adjustment mechanism on the friction gasket.

[0006] An angle locking device and an endoscope according to an embodiment of the present invention have at least the following beneficial effects: a threaded connection is provided between an annular ring and a hub bracket, and the rotational motion of the annular ring can be converted into an axial displacement of the annular ring by slowly rotating the annular ring; and because the annular ring abuts against a friction force adjustment mechanism, the friction force adjustment mechanism is connected to the friction gasket, and the friction gasket abuts against the angle hub, the locking force of the friction force adjustment mechanism on the angle hub can be smoothly and evenly adjusted by slowly rotating the annular ring.

[0007] According to some embodiments of the present invention, the friction force adjustment mechanism includes a displacement component and a displacement drive component, the displacement component is connected to the friction gasket, the displacement drive component is connected to the displacement component, and the displacement drive component is used to drive the displacement component to move closer to or away from the friction gasket.

[0008] According to some embodiments of the present invention, the displacement assembly includes an upper wheel disc and a lower wheel disc, both of which are hinged to the wheel hub bracket, and the lower wheel disc is connected to the friction pad, the upper wheel disc is arranged on the lower wheel disc, and the upper wheel disc is connected to the annular ring, and spacing adjustment blocks are respectively arranged on the opposite surfaces of the upper wheel disc and the lower wheel disc, and the displacement drive assembly is used to drive the upper wheel disc or the lower wheel disc to rotate, so that the spacing adjustment blocks on the upper wheel disc and the spacing adjustment blocks on the lower wheel disc overlap or stagger, so that the lower wheel disc is close to or away from the friction pad.

[0009] According to some embodiments of the present invention, the displacement drive assembly includes an eccentric rotating shaft and an eccentric connecting rod, the eccentric rotating shaft deviates from the center of the upper wheel disc and is connected to the hub bracket, the eccentric connecting rod is fixedly connected to the eccentric rotating shaft, the eccentric connecting rod is movably connected to the upper wheel disc, and the eccentric rotating shaft can drive the eccentric connecting rod to rotate, thereby driving the upper wheel disc to rotate.

[0010] According to some embodiments of the present invention, the displacement drive assembly further includes an angle locking handle, and the angle locking handle is connected to the eccentric rotating shaft.

[0011] According to some embodiments of the present invention, an upper end cover is further included, wherein the upper end cover is disposed on the wheel hub bracket and is connected to the annular ring.

[0012] According to some embodiments of the present invention, one of the annular ring and the upper end cover is evenly distributed with a plurality of positioning holes on its circumference, and the other is provided with a positioning column, and the positioning column is inserted into the positioning hole.

[0013] According to some embodiments of the present invention, a transmission member is further included, the wheel hub bracket separates the friction gasket and the friction force adjustment mechanism, and the transmission member passes through the wheel hub bracket and respectively connects the friction gasket and the friction force adjustment mechanism.

[0014] According to some embodiments of the present invention, a hard ring is further included, and the hard ring is arranged on the friction gasket. The transmission member passes through the wheel hub bracket and is respectively connected to the hard ring and the friction force adjustment mechanism.

[0015] An endoscope according to an embodiment of the second aspect of the present invention comprises an angle locking device according to an embodiment of the first aspect of the present invention.

[0016] The endoscope according to the embodiment of the present invention has at least the following technical effects: by adopting the above-mentioned angle locking device, the locking force acting on the angle hub can be adjusted smoothly and evenly, and the adjustment process is simple and convenient.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 This is a schematic diagram of the axial cross-section structure of the angle locking device according to an embodiment of the present invention;

[0020] Figure 2 for Figure 1 An exploded view of the angle locking device shown;

[0021] Figure 3 for Figure 1 The overall assembly diagram of the angle locking device shown;

[0022] Figure 4 Schematic diagram of the displacement assembly principle of the angle locking device according to an embodiment of the present invention Figure 1 ;

[0023] Figure 5 Schematic diagram of the displacement assembly principle of the angle locking device according to an embodiment of the present invention Figure 2 ;

[0024] Figure 6 This is a top axonometric view of the upper wheel disc of the angle locking device according to an embodiment of the present invention;

[0025] Figure 7 This is a bottom-up isometric view of the upper wheel disc of the angle locking device according to an embodiment of the present invention;

[0026] Figure 8 This is a top axonometric view of the lower wheel disc of the angle locking device according to an embodiment of the present invention;

[0027] Fig. 9 This is a bottom-up isometric view of the lower wheel disc of the angle locking device according to an embodiment of the present invention;

[0028] Fig.10 This is a bottom-up isometric view of the upper end cover of the angle locking device according to an embodiment of the present invention;

[0029] Fig.11 It is a top axonometric view of an annular ring of an angle locking device according to an embodiment of the present invention;

[0030] Fig.12 This is a bottom-up isometric view of an annular ring of an angle locking device according to an embodiment of the present invention;

[0031] Fig.13 This is a bottom isometric view of the displacement drive assembly of the angle locking device according to an embodiment of the present invention.

[0032] Reference numerals: wheel hub bracket 100, angle adjustment handle 110, through hole 120;

[0033] Angle hub 200;

[0034] Friction pad 300;

[0035] Friction force adjustment mechanism 400;

[0036] Displacement assembly 410, upper wheel disc 411, sliding slot 411a, lower wheel disc 412, limiting hole 412a, spacing adjustment block 413;

[0037] Displacement drive assembly 420, eccentric shaft 421, eccentric connecting rod 422, sliding block 423, angle locking handle 424;

[0038] Annular ring 500, positioning hole 510;

[0039] Upper end cover 600, positioning column 610;

[0040] Transmission member 700;

[0041] Hard ring 800. DETAILED DESCRIPTION

[0042] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0043] In the description of the present invention, it should be understood that the orientation descriptions, such as "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "pointed", "inner", "outer", "axial", "radial", "circumferential", "all around", etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the 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 cannot be understood as a limitation to the present invention. In the description of the present invention, the side wall refers to the left side wall and / or the right side wall.

[0044] In the description of the present invention, "multiple" means more than two, "greater than", "less than", "exceed" and the like are understood to exclude the number itself, and "above", "below", "within" and the like are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0045] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "setting", "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two components. "Abutment" is a direct connection. "Bolt connection" and "screw connection" can be equivalently replaced. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0046] Reference Figures 1 to 3 The angle locking device according to the first embodiment of the present invention includes: a wheel hub bracket 100, the side wall of which is provided with threads; an angle hub 200, which is hinged on the wheel hub bracket 100; a friction gasket 300, which abuts the angle hub 200; a friction force adjustment mechanism 400, which is connected to the friction gasket 300; an annular ring 500, which abuts the friction force adjustment mechanism 400, and the annular ring 500 is threadedly connected to the wheel hub bracket 100, and is used to adjust the pressure applied by the friction force adjustment mechanism 400 on the friction gasket 300.

[0047] The outer contour of the hub bracket 100 is roughly cylindrical, the axial cross section is roughly H-shaped, the center is a sleeve structure, and a center hole is opened. The angle hub 200 is roughly disc-shaped and hinged to the hub bracket 100. After the angle hub 200 is installed, it can only rotate but cannot produce axial displacement. It can be understood that the angle hub 200 can be connected to the movable tube section of the endoscope insertion tube, and the rotation angle of the movable tube section can be adjusted by rotating the angle hub 200, and a rotating shaft can be installed in the center hole and connected to the angle adjustment handle 110, so that the staff can adjust the rotation angle of the angle hub 200 through the angle adjustment handle 110.

[0048] A friction pad 300 is abutted on the angle hub 200. The friction pad 300 is in a ring shape and can convert the pressure applied to the friction pad 300 into friction resistance to the angle hub 200. It can be understood that the greater the pressure applied to the friction pad 300, the greater the resistance to the angle hub 200, and the more difficult it is for the angle hub 200 to rotate. When the pressure applied to the friction pad 300 reaches a higher value, the angle hub 200 can no longer rotate, thereby achieving the effect of locking the angle hub 200. It can also be understood that when the friction gasket 300 is located above the angle hub 200, the friction gasket 300 and other components that may be connected to the friction gasket 300 will provide an initial resistance to the angle hub 200 due to the gravity they are subjected to, so that even when the angle locking device is in a loosened state, the angle hub 200 will not rotate easily due to tiny forces such as accidental touching by clothes. At the same time, it also prevents the angle hub 200 from being too sensitive, preventing the angle hub 200 from rotating significantly due to a slight touch by the staff, which is inconvenient for the angle adjustment of the movable pipe section.

[0049] A friction force adjustment mechanism 400 is provided above the friction pad 300. The friction force adjustment mechanism 400 is connected to the friction pad 300 and can apply pressure to the friction pad 300, thereby controlling the difficulty of the angle hub 200 to rotate and completely locking or loosening the angle hub 200. In this embodiment, the connection between the friction force adjustment mechanism 400 and the friction pad 300 is indirect. There is a part below the friction force adjustment mechanism 400 that directly abuts against the friction pad 300, and the friction force adjustment mechanism 400 increases the pressure of this part on the friction pad 300 by causing this part to produce a slight downward displacement, thereby adjusting the resistance of the angle hub 200. It can be understood that the friction force adjustment mechanism 400 and the friction pad 300 can also be directly connected by abutment. The ultimate source of the force that causes this part to produce downward displacement is generally the staff. It is understandable that although the pressing force of the staff can be directly converted into the displacement of this part by means of a slide rail or a slider, the displacement of this part is relatively small, so the difference between the locking and loosening states in the above-mentioned manner is very small, which is not convenient for the staff to observe. Therefore, the displacement of this part is generally converted into a change in the rotation angle, which not only amplifies the degree of change, but also facilitates the operation of the staff. In this embodiment, by setting an upper wheel disc 411, a lower wheel disc 412, and setting a spacing adjustment block 413 on their opposite surfaces, the spacing adjustment block 413 is overlapped or staggered by rotating the upper wheel disc 411 to cause the spacing adjustment block 413 to be displaced, so that this part is displaced. It is understandable that the rotation can also be converted into an axial displacement by setting a thread, so that this part is displaced.

[0050] An annular ring 500 is arranged above the friction force adjustment mechanism 400, and an outer wall of the annular ring 500 is provided with an outer thread, and an inner wall of the hub bracket 100 is provided with an inner thread, and the annular ring 500 is threadedly connected with the hub bracket 100. Since the annular ring 500 abuts against the friction force adjustment mechanism 400, and the friction force adjustment mechanism 400 abuts against the friction pad 300, the annular ring 500 can give an additional pressure to the friction pad 300, and the annular ring 500 is threadedly connected with the hub bracket 100, and the annular ring 500 can be rotated to cause the annular ring 500 to produce an axial displacement, so that the distance between the annular ring 500 and the friction pad 300 can be adjusted. When the endoscope angle locking device is locked, the friction force adjustment mechanism 400 between the annular ring 500 and the friction pad 300 can be regarded as a rigid part, which abuts the annular ring 500 and the friction pad 300 respectively. By rotating the annular ring 500, the annular ring 500 is axially displaced, and the distance between the annular ring 500 and the friction pad 300 is adjusted, thereby adjusting the additional pressure applied by the annular ring 500 to the friction pad 300, and finally adjusting the locking force of the angle locking device. It is understandable that the annular ring 500 can also be provided with an internal thread, and the hub bracket 100 can also be provided with a corresponding external thread.

[0051] It can also be understood that the angle hub 200 can be hinged at any height of the hub bracket 100, for example, it can be hinged at the upper end of the hub bracket 100 or hinged at the middle position of the hub bracket 100 or can be hinged at the lower end of the hub bracket 100, and the angle hub 200, the friction gasket 300, the friction force adjustment mechanism 400, and the annular ring 500 can also be connected and assembled in sequence upward or downward.

[0052] Reference Figures 1 to 5 In some embodiments of the present invention, the friction force adjustment mechanism 400 includes a displacement component 410 and a displacement drive component 420. The displacement component 410 is connected to the friction pad 300, and the displacement drive component 420 is connected to the displacement component 410. The displacement drive component 420 is used to drive the displacement component 410 to move closer to or away from the friction pad 300.

[0053] In this embodiment, the friction force adjustment mechanism 400 generates pressure on the friction pad 300 by causing the component connected to the friction pad 300 to generate downward displacement, so the friction force adjustment mechanism 400 includes a displacement component 410 and a displacement drive component 420, the displacement component 410 is connected to the friction pad 300, and the displacement drive component 420 is connected to the displacement component 410, and the displacement drive component 420 is used to drive the displacement component 410 to approach or move away from the friction pad 300 to control the magnitude of the pressure applied by the displacement component 410 on the friction pad 300. In this embodiment, the connection between the displacement component 410 and the friction pad 300 is indirect, and it can be understood that the displacement component 410 and the friction pad 300 can also be directly connected by abutting. In this embodiment, by providing an upper wheel disc 411, a lower wheel disc 412, and providing a spacing adjustment block 413 on the opposite surfaces thereof, the displacement drive component 420 drives the upper wheel disc 411 to overlap or stagger the spacing adjustment blocks 413, so as to cause the displacement component 410 to generate displacement. It is understandable that the rotation can be converted into axial displacement by setting a thread, so that the displacement component produces displacement; it is also understandable that the displacement component can also be set as other forms of components such as slide rails and sliders.

[0054] Reference Figures 1 to 9 In some embodiments of the present invention, the displacement assembly 410 includes an upper wheel disc 411 and a lower wheel disc 412, both of which are hinged to the wheel hub bracket 100, the lower wheel disc 412 is connected to the friction pad 300, the upper wheel disc 411 is arranged on the lower wheel disc 412, the upper wheel disc 411 is connected to the annular ring 500, and spacing adjustment blocks 413 are respectively arranged on the opposite surfaces of the upper wheel disc 411 and the lower wheel disc 412. The displacement drive assembly 420 is used to drive the upper wheel disc 411 or the lower wheel disc 412 to rotate, so that the spacing adjustment blocks 413 on the upper wheel disc 411 and the spacing adjustment blocks 413 on the lower wheel disc 412 overlap or stagger, so that the lower wheel disc 412 is close to or away from the friction pad 300.

[0055] The upper wheel disc 411 and the lower wheel disc 412 are both hinged to the wheel hub bracket 100, and the upper wheel disc 411 abuts against the annular ring 500, so the upper wheel disc 411 can rotate and is limited by the annular ring 500, and cannot produce an upward axial displacement. The lower wheel disc 412 is connected to the friction pad 300, and pressure can be applied to the friction pad 300 to lock the angle hub 200. In this embodiment, the connection between the lower wheel disc 412 and the friction pad 300 is an indirect connection. It can be understood that the lower wheel disc 412 and the friction pad 300 can also be directly connected by abutment. Matching spacing adjustment blocks 413 are respectively arranged on the opposite surfaces of the upper wheel disc 411 and the lower wheel disc 412. The spacing adjustment blocks 413 on the upper wheel disc 411 and the lower wheel disc 412 are arranged at intervals. When the upper wheel disc 411 rotates and the lower wheel disc 412 does not rotate, the spacing adjustment blocks 413 on the upper wheel disc 411 and the spacing adjustment blocks 413 on the lower wheel disc 412 can overlap or stagger. Figure 5 As shown, when the spacing adjustment blocks 413 overlap, the upper wheel disc 411 and the lower wheel disc 412 are spaced apart by the height of two spacing adjustment blocks 413. Since the upper wheel disc 411 can rotate and is limited by the annular ring 500 and cannot generate an upward axial displacement, the lower wheel disc 412 will generate a downward displacement, thereby applying pressure to the friction pad 300 to lock the angle hub 200; Figure 4 As shown, because the spacing adjustment blocks 413 on the upper wheel disc 411 and the lower wheel disc 412 are arranged at intervals, when the spacing adjustment blocks 413 are staggered, the spacing adjustment blocks 413 on the upper wheel disc 411 and the spacing adjustment blocks 413 on the lower wheel disc 412 both slide into the interval between each other, so the upper wheel disc 411 and the lower wheel disc 412 are only separated by a distance of the height of the spacing adjustment block 413, and because the upper wheel disc 411 can rotate and is limited by the annular ring 500, it cannot produce an upward axial displacement, so the lower wheel disc 412 will produce an upward displacement, thereby reducing the pressure applied to the friction pad 300 and releasing the angle hub 200. The overlapping and staggered states of the spacing adjustment blocks 413 are both changed by rotating the upper wheel disc 411. In this embodiment, the spacing adjustment blocks 413 are roughly trapezoidal, so that when the upper wheel disc 411 is rotated, the spacing adjustment blocks 413 can slide on each other's surfaces, thereby staggering or overlapping.

[0056] Reference Figure 1 , Figure 2 , Figure 6 and Fig.13In some embodiments of the present invention, the displacement drive assembly 420 includes an eccentric rotating shaft 421 and an eccentric connecting rod 422. The eccentric rotating shaft 421 deviates from the center of the upper wheel disc 411 and is connected to the hub bracket 100. The eccentric connecting rod 422 is fixedly connected to the eccentric rotating shaft 421. The eccentric connecting rod 422 is movably connected to the upper wheel disc 411. The eccentric rotating shaft 421 can drive the eccentric connecting rod 422 to rotate, thereby driving the upper wheel disc 411 to rotate.

[0057] The eccentric shaft 421 is connected to the wheel hub bracket 100, and is fixed to the wheel hub bracket 100 relative to the rotatable upper wheel disc 411, and does not rotate. In this embodiment, the wheel hub bracket 100 is fixed with an upper end cover 600, and the eccentric shaft 421 is actually installed on the upper end cover 600, and the eccentric shaft 421 is indirectly connected to the wheel hub bracket 100. The eccentric shaft 421 can rotate and is detachably connected to the upper end cover 600. The eccentric connecting rod 422 is fixedly connected to the eccentric shaft 421, which means that the eccentric connecting rod 422 and the eccentric shaft 421 are not hinged, and the eccentric connecting rod 422 rotates with the rotation of the eccentric shaft 421, but the eccentric connecting rod 422 and the eccentric shaft 421 may be detachably connected, such as a snap connection or a screw connection. The eccentric connecting rod 422 is movably connected with the upper wheel disc 411, which means that a sliding groove 411a is provided in one of the eccentric connecting rod 422 and the upper wheel disc 411, and a sliding block 423 is provided in the other, and the sliding groove 411a is not completely on the path of the sliding block 423 rotating around the eccentric rotating shaft 421, and the sliding block 423 is in the sliding groove 411a and can slide along the sliding groove 411a. Therefore, when the eccentric rotating shaft 421 rotates to drive the eccentric connecting rod 422 to rotate and finally drives the sliding block 423 to rotate, the sliding block 423 slides in the sliding groove 411a, and the sliding groove 411a is not completely on the path of the sliding block 423 rotating around the eccentric rotating shaft 421, and finally drives the upper wheel disc 411 to rotate, thereby controlling the conversion of the locking and releasing states of the angle locking device. In this embodiment, the sliding groove 411a is provided on the upper wheel disc 411, and the sliding groove 411a extends along the radial direction of the upper wheel disc 411, and the sliding block 423 is provided on the eccentric connecting rod 422, and the sliding block 423 is integrally formed with the eccentric connecting rod 422. It can be understood that the displacement drive assembly can also drive the displacement assembly 410 to rotate by means of gear transmission as in the patent document shown in CN111067469A. The rotation method in this embodiment is simpler in structure than the above patent document, and its parts are easy to produce and assemble.

[0058] Reference Figure 1 , Figure 2 and Figure 3 In some embodiments of the present invention, the displacement driving assembly 420 further includes an angle locking handle 424 , and the angle locking handle 424 is connected to the eccentric rotating shaft 421 .

[0059] The angle locking handle 424 is provided to facilitate the staff to perform the locking and releasing operations of the angle locking device.

[0060] Reference Figure 1 , Figure 2 , Fig.10 , Fig.11 and Fig.12 In some embodiments of the present invention, an upper end cover 600 is further included. The upper end cover 600 is disposed on the wheel hub bracket 100 and is connected to the annular ring 500 .

[0061] The upper end cover 600 is a part of the endoscope housing, fixedly connected to the wheel hub bracket 100, and will not easily rotate or translate loose after installation. The upper end cover 600 is connected to the annular ring 500, which plays a certain limiting role on the annular ring 500, so that the annular ring 500 will not rotate again after adjusting the locking force, ensuring that the locking force will not change during use. It can be understood that the upper end cover 600 can also become a base on which another component other than the wheel hub bracket 100 can be installed. For example, the eccentric shaft 421 can be installed on the wheel hub bracket 100 or on the upper end cover 600. In this embodiment, the eccentric shaft 421 is hinged on the upper end cover 600, which facilitates the assembly of the endoscope. The connection between the upper end cover 600 and the annular ring 500 can be a bolt connection, a snap connection, etc.

[0062] Reference Figure 1 , Figure 2 , Fig.10 , Fig.11 and Fig.12 In some embodiments of the present invention, one of the annular ring 500 and the upper end cover 600 has a plurality of positioning holes 510 evenly distributed on the circumference, and the other is provided with a positioning column 610, and the positioning column 610 is inserted into the positioning hole 510.

[0063] The annular ring 500 is evenly distributed with a plurality of positioning holes 510 on its circumference, and the annular ring 500 is provided with three positioning posts 610, which are integrally formed with the annular ring 500. After the annular ring 500 is adjusted, the upper end cover 600 is covered on the hub bracket 100, and the positioning posts 610 on the upper end cover 600 are aligned with the positioning holes 510, so that the positioning posts 610 are inserted into the positioning holes 510, and the annular ring 500 is limited so that the annular ring 500 can no longer rotate. It can be understood that the more positioning holes 510 there are, the higher the adjustment accuracy of the annular ring 500 is. The adjustment accuracy of the annular ring 500 is the angle between adjacent positioning holes 510. Each time the annular ring 500 can rotate this angle or an integer multiple of this angle, the positioning posts 610 can be correctly aligned and inserted into the positioning holes 510 on the rotated annular ring 500. The positioning post 610 can be set to one or more. Since the aperture of the positioning hole 510 and the diameter of the positioning post 610 are not completely consistent, setting a plurality of positioning posts 610 can improve the degree of limiting, so that the annular ring 500 is not prone to loosening and slightly rotating due to a low degree of fit after being limited. At the same time, the setting of multiple positioning posts 610 may still have a limiting effect when some of the positioning posts 610 are damaged.

[0064] Reference Figure 1 , Figure 2 and Fig. 9 In some embodiments of the present invention, a transmission member 700 is further included. The hub bracket 100 separates the friction pad 300 and the friction force adjustment mechanism 400. The transmission member 700 passes through the hub bracket 100 and is respectively connected to the friction pad 300 and the friction force adjustment mechanism 400.

[0065] The wheel hub bracket 100 separates the friction pad 300 and the friction force adjustment mechanism 400, so that the friction pad 300 and the friction force adjustment mechanism 400 are located on both sides of the wheel hub bracket 100. Compared with the same-side installation method, the product structure height can be reduced, the product space can be more reasonably utilized, and the product volume can be reduced. A transmission member 700 is provided, and the transmission member 700 passes through the wheel hub bracket 100 and abuts against the friction pad 300 and the friction force adjustment mechanism 400 respectively. The setting of the transmission member 700 can transmit the displacement of the friction force adjustment mechanism 400 to the friction pad 300 through the transmission member 700, thereby generating pressure on the friction pad 300 and locking the angle hub 200. It is understandable that the transmission member 700 has a certain limiting effect on the lower wheel disc 412. Since the transmission member 700 is in the through hole 120 of the hub bracket 100, the transmission member 700 can only produce axial displacement but cannot rotate around the hub bracket 100. When the transmission member 700 is inserted into the limiting hole 412a of the lower wheel disc 412, the lower wheel disc 412 is limited by the transmission member 700 and cannot rotate, but can only produce axial displacement. It is also understandable that the transmission member 700 and the hub bracket 100 separate the friction pad 300 and the friction force adjustment mechanism 400, so that the rotation of the friction pad 300 will not in turn affect the friction force adjustment mechanism 400, driving the friction force adjustment mechanism 400 to rotate.

[0066] Reference Figure 1 and Figure 2 In some embodiments of the present invention, a hard ring 800 is further included. The hard ring 800 is disposed on the friction pad 300. The transmission member 700 passes through the wheel hub bracket 100 and is respectively connected to the hard ring 800 and the friction force adjustment mechanism 400.

[0067] Because the friction pad 300 is generally soft, it is easy to deform under local pressure without increasing too much friction resistance, and the transmission member 700 is a cylinder and has a small contact area with the friction pad 300, so it is necessary to set a hard ring 800 to disperse the force applied to the friction pad 300, so that the friction pad 300 is evenly stressed and the pressure is better converted into friction resistance to the angle hub 200. At the same time, the hard ring 800 is set to limit the friction pad 300 to a certain extent, so that the friction pad 300 will not slide off the surface of the angle hub 200, and the hard ring 800 also has a certain protective effect to prevent friction and wear on the upper surface of the friction pad 300. The hard ring 800 can be a steel ring, an iron ring, a glass ring, a plastic ring, etc. Compared with the friction pad 300, the material constituting the hard ring 800 is harder and deforms less after being stressed.

[0068] Reference Figure 3 The endoscope according to the second embodiment of the present invention comprises an angle locking device according to the first embodiment of the present invention.

[0069] By adopting the above-mentioned angle locking device, the endoscope can smoothly and evenly adjust the locking force acting on the angle hub 200, and the adjustment process is simple and convenient.

[0070] Reference below Figures 1 to 9 The working principle of the angle locking device of the embodiment of the present invention is described in detail with a specific embodiment. It is worth noting that the following description is only an exemplary description and is not a specific limitation of the invention.

[0071] The angle locking device of the present invention mainly has a locking principle and a principle for adjusting the locking force. The locking principle is as follows: the upper wheel disc 411 abuts against the annular ring 500 and cannot produce an upward axial displacement. The upper wheel disc 411 can only be driven to rotate by the angle locking handle 424, the eccentric shaft 421, and the eccentric connecting rod 422; when the upper wheel disc 411 rotates, the spacing adjustment block 413 between the upper wheel disc 411 and the lower wheel disc 412 slides from an offset state to an overlapping state. At this time, the spacing between the upper wheel disc 411 and the lower wheel disc 412 increases from the height of one spacing adjustment block 413 to the height of two spacing adjustment blocks 413, and the upper wheel disc 411 cannot move upward, so only the lower wheel disc 412 can move downward; and the lower wheel disc 412 abuts against the transmission member 700 below, so the downward movement of the lower wheel disc 412 drives the transmission member 700 downward. It is additionally explained that the setting of the transmission member 700 limits the lower wheel disc 412 from rotating; because Because the transmission member 700 abuts against the hard ring 800 below, the transmission member 700 moves downward and drives the hard ring 800 to move downward; the hard ring 800 abuts against the friction pad 300 below, and the friction pad 300 abuts against the angle hub 200 below, and the angle hub 200 cannot produce axial displacement and can only rotate, so the angle hub 200 cannot move downward; at this time, the hard ring 800 above the friction pad 300 moves downward, and the angle hub 200 below the friction pad 300 cannot move downward, so the friction pad 300 will be subjected to the pressure applied by the downward movement of the hard ring 800; and the pressure on the friction pad 300 increases, and the friction resistance to the angle hub 200 below the friction pad 300 also increases. When this resistance reaches a maximum value, the angle hub 200 cannot rotate, thereby achieving a locking effect. Based on the above locking principle, the principle of adjusting the locking force is described: the space between the annular ring 500 and the angle hub 200 is the space where the entire device will produce axial displacement, and the height distance of a spacing adjustment block 413 added by operating the angle locking handle 424 is constant. When the annular ring 500 produces axial displacement through the thread, the distance between the annular ring 500 and the angle hub 200 also changes; when the distance between the annular ring 500 and the angle hub 200 increases, the locking force decreases; when the distance between the annular ring 500 and the angle hub 200 decreases, the locking force increases.On the basis of the above locking principle, the principle of adjusting the locking force is further described in combination with actual conditions: in the actual assembly of the angle locking device, two situations may occur - in the first situation, when the angle locking device is loosened, there is a certain gap between the annular ring 500 and the upper wheel disc 411. At this time, the upper wheel disc 411 can move upward until it abuts against the annular ring 500 and can no longer move upward. Therefore, when finally locked, the distance that the hard ring 800 moves downward is the distance of the height of the spacing adjustment block 413 minus the distance that the upper wheel disc 411 can move upward. Because the greater the distance that the hard ring 800 moves downward, the greater the locking force, and the distance that the upper wheel disc 411 can move upward is the distance between the annular ring 500 and the upper wheel disc 411 Gap distance, so when the annular ring 500 is rotated and the annular ring 500 moves downward, the gap distance between the annular ring 500 and the upper wheel disc 411 becomes smaller, and the locking force becomes larger, and vice versa; in the second case, when the angle locking device is loosened, the annular ring 500 and the upper wheel disc 411 are pressed against each other, and the upper wheel disc 411 cannot move upward at this time. At this time, the component between the annular ring 500 and the friction pad 300 can be regarded as a whole rigid part, and the annular ring 500 can directly apply an initial pressure to the friction pad 300. This initial pressure increases the locking force, and when the annular ring 500 is rotated and the annular ring 500 moves downward, this initial pressure becomes larger, so that the locking force at the final locking time also becomes larger accordingly, and vice versa.

[0072] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. An angle locking device, characterized in that: include: A wheel hub bracket, the side wall of which is provided with threads; An angle hub, hinged to the hub bracket; a friction gasket abutting against the angle hub; A friction force adjustment mechanism connected to the friction pad; an annular ring, abutting against the friction force adjustment mechanism, the annular ring being threadedly connected to the wheel hub bracket, and used for adjusting the pressure applied by the friction force adjustment mechanism on the friction pad; The friction force adjustment mechanism includes a displacement component and a displacement drive component, wherein the displacement component is connected to the friction pad, and the displacement drive component is connected to the displacement component, and the displacement drive component is used to drive the displacement component to approach or move away from the friction pad; The displacement assembly includes an upper wheel disc and a lower wheel disc, both of which are hinged to the wheel hub bracket, and the lower wheel disc is connected to the friction pad. The upper wheel disc is arranged on the lower wheel disc, and the upper wheel disc is connected to the annular ring. Spacing adjustment blocks are respectively arranged on the opposite surfaces of the upper wheel disc and the lower wheel disc, and the displacement drive assembly is used to drive the upper wheel disc or the lower wheel disc to rotate, so that the spacing adjustment blocks on the upper wheel disc and the spacing adjustment blocks on the lower wheel disc overlap or stagger, so that the lower wheel disc is close to or away from the friction pad.

2. An angle locking device according to claim 1, characterized in that: The displacement drive assembly includes an eccentric rotating shaft and an eccentric connecting rod. The eccentric rotating shaft deviates from the center of the upper wheel disc and is connected to the wheel hub bracket. The eccentric connecting rod is fixedly connected to the eccentric rotating shaft. The eccentric connecting rod is movably connected to the upper wheel disc. The eccentric rotating shaft can drive the eccentric connecting rod to rotate, thereby driving the upper wheel disc to rotate.

3. An angle locking device according to claim 2, characterized in that: One of the eccentric connecting rod and the upper wheel disc is provided with a sliding groove, and the other is provided with a sliding block, and the sliding groove is not completely located on the path of the sliding block rotating around the eccentric rotating shaft, and the sliding block is located in the sliding groove and can slide along the sliding groove.

4. An angle locking device according to claim 3, characterized in that: The displacement drive assembly also includes an angle locking handle, and the angle locking handle is connected to the eccentric rotating shaft.

5. An angle locking device according to claim 1, characterized in that: It also includes an upper end cover, which is arranged on the wheel hub bracket and connected to the annular ring.

6. An angle locking device according to claim 5, characterized in that: One of the annular ring and the upper end cover is evenly distributed with a plurality of positioning holes on its circumference, and the other is provided with a positioning column, and the positioning column is inserted into the positioning hole.

7. An angle locking device according to claim 1, characterized in that: It also includes a transmission member, the wheel hub bracket separates the friction pad and the friction force adjusting mechanism, and the transmission member passes through the wheel hub bracket and is respectively connected to the friction pad and the friction force adjusting mechanism.

8. An angle locking device according to claim 7, characterized in that: The wheel hub bracket is provided with a through hole matching the transmission member, the transmission member is arranged in the through hole of the wheel hub bracket, and the transmission member can only slide forward and backward relative to the wheel hub bracket, and one end of the transmission member close to the friction force adjustment mechanism is fixedly connected to the lower wheel disc.

9. An angle locking device according to claim 8, characterized in that: It also includes a hard ring, which is arranged on the friction pad, and the transmission member passes through the wheel hub bracket to connect the hard ring and the friction force adjustment mechanism respectively.

10. An endoscope, characterized in that: Comprising an angle locking device according to any one of claims 1 to 9.

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