Endoscope and reversing mechanism in operating handle thereof

Abstract

Provided are an endoscope and a reversing mechanism in an operating handle thereof. The reversing mechanism in the operating handle comprises a mounting support (100), a mounting shaft (200), a winding wheel (300), a driven wheel (400), and a driving wheel (500). The mounting shaft (200) is movably arranged on the mounting support (100) in an axial direction, and the mounting shaft (200) is provided with a first snap-fit groove (221) and a second snap-fit groove (222) that are arranged in the axial direction. The winding wheel (300) sheathes the mounting shaft (200) and is fixed relative to the mounting support (100) in the axial direction, and the winding wheel (300) is provided with an elastic snap-fit lever (310). The driven wheel (400) sheathes the mounting shaft (200) and is fixed to the mounting shaft (200) in the axial direction, and the driven wheel (400) and the winding wheel (300) rotate synchronously. The mounting shaft (200) is movable in the axial direction between a first position and a second position. When the mounting shaft is in the first position, the driven wheel (400) and the driving wheel (500) rotate synchronously, and the elastic snap-fit lever (310) is snap-fitted with the first snap-fit groove (221), such that the reversing mechanism in the operating handle is locked in an American hand operation state. When the mounting shaft is in the second position, the driven wheel (400) and the driving wheel (500) rotate in opposite directions, and the elastic snap-fit lever (310) is snap-fitted with the second snap-fit groove (222), such that the reversing mechanism in the operating handle is locked in a European hand operation state.

Description

The reversing mechanism inside the endoscope and its operating handle Technical Field

[0001] This application relates to the field of medical device technology, and in particular to the reversing mechanism within an endoscope and its operating handle. Background Technology

[0002] An endoscope consists of an operating handle and an insertion tube connected to the handle. The insertion tube is a tube equipped with a light and can be inserted into the stomach through the mouth or other natural orifices. The bending direction of the insertion tube's curved section is controlled by a lever on the operating handle. When the lever is turned in a certain direction, the curved section bends in the corresponding fixed direction. European operators typically bend the curved section in the same direction as the lever is turned, while American operators typically bend it in the opposite direction.

[0003] In related technologies, a reversing mechanism is provided inside the operating handle, which is used to switch the operating handle from the European hand operating state to the American hand operating state.

[0004] However, the reversing mechanism inside the operating handle cannot reliably stabilize the operating state for European or American hands after reversing. Summary of the Invention

[0005] Therefore, it is necessary to provide an endoscope and its operating handle reversing mechanism to address the problem that the reversing mechanism in the operating handle cannot be well stabilized in the operating state of a European or American hand after reversing.

[0006] A reversing mechanism within an operating handle, the reversing mechanism comprising:

[0007] Mounting rack;

[0008] A mounting shaft is movably disposed on the mounting bracket along the axial direction, and the mounting shaft has a first and a second retaining groove disposed along the axial direction.

[0009] A winding wheel is sleeved outside the mounting shaft and fixed axially relative to the mounting bracket; the winding wheel has an elastic snap-fit.

[0010] The driven wheel is sleeved on the mounting shaft and fixed axially to the mounting shaft. The driven wheel rotates synchronously with the winding wheel.

[0011] The driving wheel rotates in the same direction or in the opposite direction to the driven wheel;

[0012] The mounting shaft has a first position and a second position that can move axially. In the first position, the driven wheel rotates in the opposite direction to the driving wheel, and the elastic buckle engages with the first buckle groove. In the second position, the driven wheel rotates in the same direction as the driving wheel, and the elastic buckle engages with the second buckle groove on the mounting shaft.

[0013] In one embodiment, the mounting shaft includes:

[0014] A pressing shaft, one end of which extends out of the mounting bracket to serve as a button, is provided inside the pressing shaft. The first elastic element is used to cause the pressing shaft to return to its axial position.

[0015] A snap-fit ​​shaft is coaxially connected to the pressing shaft. The snap-fit ​​shaft and the pressing shaft can move relative to each other along the axial direction. The first snap-fit ​​groove and the second snap-fit ​​groove are provided on the snap-fit ​​shaft. A second elastic element is provided inside the snap-fit ​​shaft. The second elastic element is used to reset the snap-fit ​​shaft along the axial direction.

[0016] In one embodiment, the end of the pressing shaft near the snap-fit ​​shaft is provided with a clearance hole, and the snap-fit ​​shaft has an end face that abuts against the pressing shaft. The end face and the clearance hole form a second snap groove. When the pressing shaft is rotated axially, the elastic snap can be disengaged from the clearance hole.

[0017] In one embodiment, the snap-fit ​​shaft includes an insertion section and a snap-fit ​​section, the outer diameter of the insertion section being smaller than the outer diameter of the snap-fit ​​section, the insertion section extending into the pressing shaft, and the first snap groove being located on one side of the second snap groove along the pressing direction of the pressing shaft.

[0018] In one embodiment, a first receiving cavity is provided in the extending section, and a partition section is provided at one end of the first receiving cavity near the snap-fit ​​section. The first elastic member is disposed in the first receiving cavity, with one end of the first elastic member abutting against the snap-fit ​​section and the other end abutting against the partition section.

[0019] In one embodiment, a second receiving cavity is provided in the snap-fit ​​section, the first receiving cavity and the second receiving cavity are separated by the partition section, the second elastic member is disposed in the second receiving cavity, one end of the second elastic member abuts against the partition section, and the other end abuts against the mounting bracket.

[0020] In one embodiment, the resilient buckle includes a resilient segment and a buckle disposed inside the resilient segment, the buckle having a limiting plane extending radially;

[0021] The first groove includes a mating plane extending radially, and when the mounting shaft is in the first position, the limiting plane abuts against the mating plane;

[0022] When the mounting shaft is in the second position, the limiting plane abuts against the end face of the snap-fit ​​shaft.

[0023] In one embodiment, the latch has a pop-out surface that gradually tilts toward the axis of the latching shaft along the pressing direction of the pressing shaft.

[0024] In one embodiment, the first buckle groove has a sliding surface disposed opposite to the mating plane, and the pressing axis moves downward, thereby causing the elastic buckle to gradually retract out of the first buckle groove along the inclined direction of the sliding surface.

[0025] In one embodiment, the snap-fit ​​shaft has a first groove and a second groove that are interconnected. The end of the first groove away from the second groove passes through the snap-fit ​​shaft, and the extension direction of the second groove is set at an angle to the axial direction.

[0026] The driven wheel has a first protrusion on its inner side, which engages with the second groove.

[0027] In one embodiment, the winding wheel includes a wheel body and a sleeve section disposed at one end of the wheel body. The sleeve section is sleeved on the mounting shaft. The elastic buckle is disposed on the sleeve section. The sleeve section has a guide groove extending axially. The snap-fit ​​shaft is provided with a second protrusion, which is slidably disposed in the guide groove.

[0028] In one embodiment, the driven wheel is sleeved outside the sleeved section, and the second protrusion is located on one side of the second groove along the pressing direction.

[0029] An endoscope is characterized in that it includes an insertion tube and an operating handle disposed at one end of the insertion tube, the operating handle is provided with a reversing device, a pull rope is wound on the winding reel, and the pull rope is connected to a curved portion on the insertion tube.

[0030] In the aforementioned endoscope and its operating handle, the reversing mechanism, when the mounting shaft is in the first position, engages the latch on the winding wheel with the first latch groove on the mounting shaft, thus fixing the mounting shaft in the first position. This locks the driven wheel on the mounting shaft into engagement with the driving wheel, thereby locking the reversing mechanism within the operating handle into the American hand operation state. When the mounting shaft moves axially to the second position, the latch on the winding wheel engages with the second latch groove on the mounting shaft, fixing the mounting shaft in the second position. This stabilizes the driven wheel on the mounting shaft in engagement with the drive wheel, thereby locking the reversing mechanism within the operating handle into the European hand operation state. Attached Figure Description

[0031] Figure 1 is a schematic diagram of the structure of the mounting shaft in the reversing mechanism in the first position in one embodiment.

[0032] Figure 2 is a schematic diagram of the structure of the mounting shaft in the reversing mechanism in the second position in one embodiment.

[0033] Figure 3 is a schematic diagram of the connection structure between the mounting shaft and the winding wheel and the driven wheel in one embodiment when the mounting shaft is in the first position.

[0034] Figure 4 is a schematic diagram of the connection structure between the mounting shaft and the winding wheel and the driven wheel in one embodiment when the mounting shaft is in the second position.

[0035] Figure 5 is a schematic diagram of the connection structure between the mounting shaft and the winding wheel in one embodiment.

[0036] Figure 6 is a schematic diagram of the structure of the mounting shaft from one perspective in one embodiment.

[0037] Figure 7 is a structural schematic diagram of the mounting shaft from another perspective in one embodiment.

[0038] Reference numerals: 100, mounting bracket; 200, mounting shaft; 210, pressing shaft; 211, clearance hole; 220, snap-fit ​​shaft; 221, first snap groove; 2211, mating plane; 2212, sliding surface; 222, second snap groove; 223, extension section; 2231, first receiving cavity; 224, snap-fit ​​section; 2241, second receiving cavity; 2242, end face; 225, partition section; 250 1. First elastic element; 260. Second elastic element; 271. First groove; 272. Second groove; 280. Second protrusion; 300. Winding wheel; 310. Elastic buckle; 311. Elastic section; 312. Buckle; 3121. Limiting plane; 3122. Pop-out surface; 330. Wheel body; 340. Sleeve section; 341. Guide groove; 400. Driven wheel; 500. Driving wheel; 600. Transmission wheel. Detailed Implementation

[0039] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0040] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0041] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0042] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0043] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0044] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0045] Referring to Figures 1 and 2, an embodiment of this application provides a reversing mechanism within an operating handle. The reversing mechanism includes a mounting frame 100, a mounting shaft 200, a winding wheel 300, a driven wheel 400, and a driving wheel 500. The mounting shaft 200 is axially movably mounted on the mounting frame 100 and has a first locking groove 221 and a second locking groove 222 arranged axially. The winding wheel 300 is sleeved on the mounting shaft 200 and axially fixed relative to the mounting frame 100, and has an elastic snap-fit ​​310. The driven wheel 400 is sleeved on the mounting shaft 200 and axially fixed to it, rotating synchronously with the winding wheel 300. The driving wheel 500 rotates in the same direction or in the opposite direction to the driven wheel 400. The mounting shaft 200 has a first position and a second position that can move axially. Referring to Figure 1, in the first position, the driven wheel 400 and the driving wheel 500 rotate synchronously, and the elastic buckle 310 engages with the first buckle groove 221. Referring to Figure 2, in the second position, the driven wheel 400 and the driving wheel 500 rotate in opposite directions, and the elastic buckle 310 engages with the second buckle groove 222 on the mounting shaft 200.

[0046] It should be noted that the reversing mechanism within the operating handle of this application is used to install in the operating handle of the endoscope. The endoscope includes an operating handle and an insertion tube. One end of the insertion tube is connected to the operating handle, and the other end is provided with a bending section. A winding wheel 300 is provided inside the operating handle, and a pull rope is wound on the winding wheel 300. The other end of the pull rope passes through the insertion tube and is connected to the bending section. When the winding wheel 300 rotates in different directions, the pull rope drives the bending section to rotate in the opposite direction. However, the operating habits of doctors in the Americas and Europe are different. European doctors operate in the same direction as the rotation of the operating lever when rotating it, while American doctors operate in the opposite direction. To accommodate the operating habits of both American and European doctors, a reversing mechanism is incorporated within the operating handle. This mechanism includes a mounting shaft 200, a driving wheel 500, a driven wheel 400, and a transmission wheel 600. The transmission wheel 600 meshes with the driving wheel 500. The winding wheel 300 and the driven wheel 400 are simultaneously mounted on the mounting shaft 200. As the mounting shaft 200 moves axially, it switches from meshing with the driving wheel 500 to meshing with the transmission wheel 600. When the mounting shaft 200 is in its first position, accommodating the operating habits of American doctors, the driven wheel 400 directly meshes with the driving wheel 500, and their rotation directions are opposite. This causes the winding wheel 300 to rotate in the opposite direction to the driving wheel 500; that is, when the driving wheel 500 is rotated, the winding wheel 300 rotates in the opposite direction, thereby causing the curved section to rotate in the opposite direction. When the mounting shaft 200 is in the second position, which is suitable for European doctors' operating habits, the driven wheel 400 meshes with the driving wheel 500 through the transmission wheel 600. The driven wheel 400 and the driving wheel 500 rotate in the same direction, which in turn makes the winding wheel 300 rotate in the same direction as the driving wheel 500. That is, when the driving wheel 500 is rotated, the winding wheel 300 rotates in the same direction, thereby driving the curved part to rotate in the same direction.

[0047] In this embodiment, when the mounting shaft 200 is in the first position, the latch 312 on the winding wheel 300 engages with the first latch groove 221 on the mounting shaft 200, thus fixing the mounting shaft 200 in the first position. This locks the driven wheel 400 on the mounting shaft 200 in the engagement position with the driving wheel 500, thereby locking the reversing mechanism in the operating handle into the American hand operation state. When the mounting shaft 200 moves axially to the second position, the latch 312 on the winding wheel 300 engages with the second latch groove 222 on the mounting shaft 200, thus fixing the mounting shaft 200 in the second position. This stabilizes the driven wheel 400 on the mounting shaft 200 in the engagement position with the transmission wheel 600, thereby locking the reversing mechanism in the operating handle into the European hand operation state.

[0048] In some embodiments, the mounting shaft 200 includes a pressing shaft 210 and a snap-fit ​​shaft 220. One end of the pressing shaft 210 extends outside the mounting bracket 100 to serve as a button. A first elastic element 250 is provided inside the pressing shaft 210, which is used to reset the pressing shaft 210 axially. The snap-fit ​​shaft 220 is coaxially connected to the pressing shaft 210, and the snap-fit ​​shaft 220 and the pressing shaft 210 are capable of relative movement axially. A first retaining groove 221 and a second retaining groove 222 are provided on the snap-fit ​​shaft 220. A second elastic element 260 is provided inside the snap-fit ​​shaft 220, which is used to reset the snap-fit ​​shaft 220 axially.

[0049] In this application, a portion of the snap-fit ​​shaft 220 is fitted inside the pressing shaft 210, or a portion of the pressing shaft 210 is fitted inside the snap-fit ​​shaft 220 to achieve a coaxial connection between the two. In this application, one end of the snap-fit ​​shaft 220 extends into the pressing shaft 210.

[0050] In this embodiment, one end of the pressing shaft 210 extends outside the mounting bracket 100. When the pressing shaft 210 is pressed, it drives the snap-fit ​​shaft 220 to move axially, thereby allowing the snap-fit ​​shaft 220 to switch from a first position to a second position. Simultaneously, after each position switch, the first elastic element 250 causes the pressing shaft 210 to spring back until one end extends outside the mounting bracket 100, facilitating the next position switch by the pressing shaft 210 driving the snap-fit ​​shaft 220. The second elastic element 260 is disposed inside the snap-fit ​​shaft 220. When the elastic buckle 310 disengages from the second buckle groove 222, the second elastic element 260 causes the snap-fit ​​shaft 220 to spring back to the first position.

[0051] It should be noted that the pressing shaft 210 includes a shaft and a button connected in sequence. One end of the button is used to engage with the mounting bracket 100 to prevent the button from falling out of the mounting bracket 100, and the other end of the button is used to extend into the mounting bracket 100. The button and the shaft can be manufactured separately or as a single piece.

[0052] Furthermore, referring to Figures 3 and 4, the end of the pressing shaft 210 near the snap-fit ​​shaft 220 is provided with a relief hole 211, and the snap-fit ​​shaft 220 has an end face 2242 that abuts against the pressing shaft 210. The end face 2242 and the relief hole 211 form a second snap groove 222. When the pressing shaft 210 is rotated axially, the elastic snap 310 can be disengaged from the relief hole 211.

[0053] In this embodiment, the elastic buckle 310 is used to engage with the second buckle groove 222 from the clearance hole 211. Therefore, when the shaft 210 is rotated and pressed along the axial direction, the elastic buckle 310 can be disengaged from the clearance hole 211, thereby disengaging the elastic buckle 310 from the second buckle groove 222, so that the elastic buckle 310 can switch from the second buckle groove 222 to the first buckle groove 221.

[0054] Referring to Figure 7, the end face 2242 of the clearance hole 211 connected to the pressing shaft 210 along the circumferential side wall is provided with a rounded corner, which makes it easy for the elastic buckle 310 to rotate into or out of the clearance hole 211.

[0055] In some embodiments, the snap-fit ​​shaft 220 includes an extension section 223 and a snap-fit ​​section 224. The outer diameter of the extension section 223 is smaller than the outer diameter of the snap-fit ​​section 224. The extension section 223 extends into the pressing shaft 210. The first snap groove 221 is located on one side of the second snap groove 222 along the pressing direction of the pressing shaft 210.

[0056] In this embodiment, the extension section 223 extends into the pressing shaft 210, thereby realizing the axial connection between the snap-fit ​​shaft 220 and the pressing shaft 210, while the pressing shaft 210 can rotate relative to the snap-fit ​​shaft 220.

[0057] In practical use, referring to Figure 1 or Figure 3, taking the initial state of the elastic buckle 310 being engaged with the first buckle groove 221 as an example, when it is necessary to switch to the engagement of the elastic buckle 310 with the second buckle groove 222, firstly rotate the pressing shaft 210, which in turn drives the clearance hole 211 to rotate, so that the second buckle groove 222 is located on one side of the first buckle groove 221 along the axial direction. Then press the pressing shaft 210, and the pressing shaft 210 moves downward, which causes the elastic buckle 310 to exit outside the first buckle groove 221. Since the first buckle groove 221 is located on one side of the second buckle groove 222 along the pressing direction of the pressing shaft 210, the elastic buckle 310 can then be engaged into the second buckle groove 222.

[0058] In some embodiments, the first buckle groove 221 has a sliding surface 2212, which is an inclined surface, for pressing the pressing shaft 210. The pressing shaft 210 moves downward, thereby causing the elastic buckle 310 to gradually exit out of the first buckle groove 221 along the inclined direction of the sliding surface 2212.

[0059] In some embodiments, a first receiving cavity 2231 is provided in the insertion section 223. A partition section 225 is provided at one end of the first receiving cavity 2231 near the snap-fit ​​section 224. A first elastic member 250 is disposed in the first receiving cavity 2231. One end of the first elastic member 250 abuts against the snap-fit ​​section 224, and the other end abuts against the partition section 225.

[0060] In this embodiment, one end of the first elastic member 250 abuts against the snap-fit ​​section 224, and the other end abuts against the partition section 225. Through the elastic force of the first elastic member 250, one end of the pressing shaft 210 can extend outside the mounting bracket 100 after each press, making it convenient to directly rotate and press the pressing shaft 210 when switching states next time.

[0061] Furthermore, a second receiving cavity 2241 is provided in the snap-fit ​​section 224. The first receiving cavity 2231 and the second receiving cavity 2241 are separated by a partition section 225. A second elastic member 260 is disposed in the second receiving cavity 2241. One end of the second elastic member 260 abuts against the partition section 225, and the other end abuts against the mounting bracket 100.

[0062] When it is necessary to switch the elastic buckle 310 from the second buckle slot 222 to the first buckle slot 221, the pressing shaft 210 is rotated so that the clearance hole 211 rotates to the side away from the elastic buckle 310. Then the pressing shaft 210 is pressed down, and the side wall of the pressing shaft 210 will push the elastic buckle 310 radially so that the elastic buckle 310 is withdrawn from the second buckle slot 222. Then, under the elastic action of the second elastic member 260, the locking shaft 220 can move to the side away from the pressing direction until the elastic buckle 310 is inserted into the first buckle slot 221.

[0063] Referring to Figures 3 and 4, in some embodiments, the elastic buckle 310 includes an elastic segment 311 and a buckle 312 disposed inside the elastic segment 311. The buckle 312 has a limiting plane 3121 extending radially. The first buckle groove 221 includes a mating plane 2211 extending radially. When the mounting shaft 200 is in the first position, the limiting plane 3121 abuts against the mating plane 2211. When the mounting shaft 200 is in the second position, the limiting plane 3121 abuts against the end face 2242 of the locking shaft 220.

[0064] In this embodiment, pressing the pressing shaft 210 axially causes the elastic buckle 310 to switch between the first buckle groove 221 and the second buckle groove 222. Therefore, the limiting plane 3121 of the elastic buckle 310 extends radially. When the mounting shaft 200 is in the first position, the limiting plane 3121 abuts against the end face 2242, i.e., the abutting plane is perpendicular to the pressing direction, thereby increasing the engagement stability of the elastic buckle 310 and the second buckle position. Similarly, the second buckle groove 222 includes a radially extending mating plane 2211. When the mounting shaft 200 is in the second position, the limiting plane 3121 abuts against the mating plane 2211, further increasing the engagement stability of the elastic buckle 310 and the second buckle position.

[0065] Furthermore, the latch 312 has a pop-out surface 3122, which gradually tilts towards the axis of the latching shaft 220 along the pressing direction of the pressing shaft 210. When the pressing shaft 210 is pressed, the pressing shaft 210 can gradually push the elastic latch 310 out of the first latching groove 221 or the second latching groove 222 through the pop-out surface 3122.

[0066] Specifically, the buckle 312 is a right-angled triangular prism, with one right-angled face connected to the elastic segment 311, the other right-angled face serving as the limiting plane 3121, and the inclined face serving as the ejection surface 3122.

[0067] In some embodiments, referring to FIG6, the snap-fit ​​shaft 220 has a first groove 271 and a second groove 272 that are interconnected. The end of the first groove 271 away from the second groove 272 passes through the snap-fit ​​shaft 220, and the extension direction of the second groove 272 is set at an angle to the axial direction. The inner side of the driven wheel 400 is provided with a first protrusion, which cooperates with the second groove 272.

[0068] In this embodiment, the end of the first groove 271 away from the second groove 272 passes through the locking shaft 220, so that the first protrusion on the driven wheel 400 can enter the second groove 272 from the first groove 271. The extension direction of the second groove 272 is set at an angle to the axial direction, that is, when the locking shaft 220 moves along the axial direction, the upper and lower sidewalls of the second groove 272 can push the first protrusion, thereby making the driven wheel 400 and the locking shaft 220 move up and down synchronously, which facilitates the switching of the driven wheel 400 between the transmission wheel 600 and the driving wheel 500.

[0069] Specifically, the first groove 271 extends axially, and the second groove 272 is perpendicular to the first groove 271.

[0070] In some embodiments, referring to FIG5, the winding wheel 300 includes a wheel body 330 and a sleeve section 340 disposed at one end of the wheel body 330. The sleeve section 340 is sleeved on the mounting shaft 200. An elastic buckle 310 is disposed on the sleeve section 340. The sleeve section 340 has a guide groove 341 extending axially. A second protrusion 280 is disposed on the snap-fit ​​shaft 220. The second protrusion 280 is slidably disposed in the guide groove 341.

[0071] In this embodiment, the sleeve section 340 has an axially extending guide groove 341, and the snap-fit ​​shaft 220 is provided with a second protrusion 280. The second protrusion 280 is slidably disposed in the guide groove 341, that is, the snap-fit ​​shaft 220 can move axially relative to the winding wheel 300. At the same time, the winding wheel 300 is fixed axially on the mounting bracket 100, so the snap-fit ​​shaft 220 can move axially relative to the mounting bracket 100. Meanwhile, the elastic buckle 310 is provided on the sleeve section 340, so when the snap-fit ​​shaft 220 moves axially, the elastic buckle 310 can switch between the first buckle groove 221 and the second buckle groove 222.

[0072] Specifically, the driven wheel 400 is sleeved outside the sleeve section 340, and the second protrusion 280 is located on one side of the second groove 272 along the pressing direction.

[0073] In this embodiment, the second protrusion 280 is located on one side of the second groove 272 along the pressing direction, and the second protrusion 280 is slidably disposed in the guide groove 341. The guide groove 341 extends axially, so that the second groove 272 is located within the radial projection range of the guide groove 341. When the snap-fit ​​shaft 220 moves axially, the driven wheel 400 can be pushed to move axially through the second protrusion 280.

[0074] Referring to Figure 2, one embodiment of this application also provides an endoscope, including an insertion tube and an operating handle disposed at one end of the insertion tube. The operating handle is provided with a reversing device for the operating handle, and a pull rope is wound on the winding reel 300. The pull rope is connected to the curved part on the insertion tube.

[0075] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0076] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A reversing mechanism within an operating handle, characterized in that, The reversing mechanism includes: Mounting rack; A mounting shaft is movably disposed on the mounting bracket along the axial direction, and the mounting shaft has a first and a second retaining groove disposed along the axial direction. A winding wheel is sleeved outside the mounting shaft and fixed axially relative to the mounting bracket; the winding wheel has an elastic snap-fit. The driven wheel is sleeved on the mounting shaft and fixed axially to the mounting shaft. The driven wheel rotates synchronously with the winding wheel. The driving wheel rotates in the same direction or in the opposite direction to the driven wheel; The mounting shaft has a first position and a second position that can move axially. In the first position, the driven wheel rotates in the opposite direction to the driving wheel, and the elastic buckle engages with the first buckle groove. In the second position, the driven wheel rotates in the same direction as the driving wheel, and the elastic buckle engages with the second buckle groove on the mounting shaft.

2. The reversing mechanism within the operating handle according to claim 1, characterized in that, The mounting shaft includes: A pressing shaft, one end of which extends out of the mounting bracket to serve as a button, is provided inside the pressing shaft. The first elastic element is used to cause the pressing shaft to return to its axial position. A snap-fit ​​shaft is coaxially connected to the pressing shaft. The snap-fit ​​shaft and the pressing shaft can move relative to each other along the axial direction. The first snap-fit ​​groove and the second snap-fit ​​groove are provided on the snap-fit ​​shaft. A second elastic element is provided inside the snap-fit ​​shaft. The second elastic element is used to reset the snap-fit ​​shaft along the axial direction.

3. The reversing mechanism within the operating handle according to claim 2, characterized in that, The pressing shaft has a clearance hole at one end near the snap-fit ​​shaft, and the snap-fit ​​shaft has an end face that abuts against the pressing shaft. The end face and the clearance hole form a second snap groove. When the pressing shaft is rotated axially, the elastic snap can be disengaged from the clearance hole.

4. The reversing mechanism within the operating handle according to claim 2, characterized in that, The snap-fit ​​shaft includes an insertion section and a snap-fit ​​section. The outer diameter of the insertion section is smaller than the outer diameter of the snap-fit ​​section. The insertion section extends into the pressing shaft. The first snap groove is located on one side of the second snap groove along the pressing direction of the pressing shaft.

5. The reversing mechanism within the operating handle according to claim 4, characterized in that, The insertion section has a first receiving cavity, and a partition section is provided at one end of the first receiving cavity near the snap-fit ​​section. The first elastic member is disposed in the first receiving cavity, with one end of the first elastic member abutting against the snap-fit ​​section and the other end abutting against the partition section.

6. The reversing mechanism within the operating handle according to claim 5, characterized in that, The snap-fit ​​section has a second receiving cavity. The first receiving cavity and the second receiving cavity are separated by the partition section. The second elastic member is disposed in the second receiving cavity. One end of the second elastic member abuts against the partition section, and the other end abuts against the mounting bracket.

7. The reversing mechanism within the operating handle according to claim 2, characterized in that, The elastic buckle includes an elastic segment and a buckle disposed inside the elastic segment, the buckle having a limiting plane extending radially; The first groove includes a mating plane extending radially, and when the mounting shaft is in the first position, the limiting plane abuts against the mating plane; When the mounting shaft is in the second position, the limiting plane abuts against the end face of the snap-fit ​​shaft.

8. The reversing mechanism within the operating handle according to claim 7, characterized in that, The buckle has a pop-out surface that gradually tilts toward the axis of the snap-fit ​​shaft along the pressing direction of the pressing shaft.

9. The reversing mechanism within the operating handle according to claim 8, characterized in that, The first buckle groove has a sliding surface that is opposite to the mating plane. The pressing axis moves downward, causing the elastic buckle to gradually retract out of the first buckle groove along the inclined direction of the sliding surface.

10. The reversing mechanism within the operating handle according to claim 2, characterized in that, The snap-fit ​​shaft has a first groove and a second groove that are interconnected. The end of the first groove away from the second groove passes through the snap-fit ​​shaft, and the extension direction of the second groove is set at an angle to the axial direction. The driven wheel has a first protrusion on its inner side, which engages with the second groove.

11. The reversing mechanism within the operating handle according to claim 10, characterized in that, The winding wheel includes a wheel body and a sleeve section disposed at one end of the wheel body. The sleeve section is sleeved on the mounting shaft. The elastic buckle is disposed on the sleeve section. The sleeve section has a guide groove extending axially. The snap-fit ​​shaft is provided with a second protrusion, which is slidably disposed in the guide groove.

12. The reversing mechanism within the operating handle according to claim 11, characterized in that, The driven wheel is sleeved outside the sleeved section, and the second protrusion is located on one side of the second groove along the pressing direction.

13. An endoscope, characterized in that, The device includes an insertion tube and an operating handle disposed at one end of the insertion tube. The operating handle is provided with a reversing device as described in any one of claims 1-12. A pull rope is wound on the winding reel, and the pull rope is connected to a curved portion on the insertion tube.

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