Endoscope and reversing mechanism in operating handle thereof

Abstract

The invention relates to an endoscope and a reversing mechanism in an operating handle of the endoscope. A reversing mechanism in the operating handle comprises a mounting frame, a mounting shaft, a reel, a driven wheel and a driving wheel. The mounting shaft is movably arranged on the mounting frame in the axial direction, and the mounting shaft is provided with a first buckling groove and a second buckling groove which are formed in the axial direction. The mounting shaft is sleeved with the reel, the reel is fixed relative to the mounting frame in the axial direction, and the reel is provided with an elastic buckle; the driven wheel is arranged outside the mounting shaft in a sleeving mode, the driven wheel and the mounting shaft are fixed in the axial direction, and the driven wheel and the reel rotate synchronously; the mounting shaft is provided with a first position and a second position which move in the axial direction, when the mounting shaft is at the first position, the driven wheel and the driving wheel rotate synchronously, and the elastic buckle is connected with the first buckle groove in a clamped mode so that the reversing mechanism in the operation handle can be locked in a manual operation state. And at the second position, the driven wheel and the driving wheel rotate reversely, and the elastic buckle is clamped with the second buckle groove, so that the reversing mechanism in the operating handle is locked in the European hand operating state.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a reversing mechanism in an endoscope and an operating handle thereof. Background Art

[0002] The endoscope includes an operating handle and an insertion tube connected to the operating handle. The insertion tube is a tube equipped with a light, which can enter the stomach through the mouth or enter the body through other natural channels. The bending direction of the curved portion of the insertion tube is controlled by the joystick on the operating handle. When the joystick is turned in a certain direction, the curved portion will bend in a corresponding fixed direction. Among them, the operating habit of European hands is that when the operating lever is turned, the bending direction of the curved portion is the same as the turning direction of the operating lever, and the operating habit of American hands is that when the operating lever is turned, the bending direction of the curved portion is opposite to the turning direction of the operating lever.

[0003] In the related art, a reversing mechanism is provided in the operating handle, and the reversing mechanism in the operating handle is used to enable the operating handle to switch from the operating state of the European hand to the operating state of the American hand.

[0004] However, after the direction is changed, the reversing mechanism in the operating handle cannot be well stabilized in the operating state of the European hand or the operating state of the American hand. Summary of the invention

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

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

[0007] Mounting frame;

[0008] A mounting shaft is movably arranged on the mounting frame along the axial direction, and the mounting shaft has a first buckle groove and a second buckle groove arranged along the axial direction;

[0009] A winding wheel, which is sleeved outside the mounting shaft and fixed axially relative to the mounting frame, and the winding wheel has an elastic buckle;

[0010] A driven wheel is sleeved outside the mounting shaft and is axially fixed to the mounting shaft, and the driven wheel rotates synchronously with the winding wheel;

[0011] A driving wheel, rotating in the same direction or in the opposite direction as the driven wheel;

[0012] Wherein, the mounting shaft has a first position and a second position that move along the axial direction. In the first position, the driven wheel and the driving wheel rotate in opposite directions, and the elastic buckle is engaged with the first buckle groove; in the second position, the driven wheel and the driving wheel rotate in the same direction, and the elastic buckle is engaged with the second buckle groove on the mounting shaft.

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

[0014] A pressing shaft, one end of which extends out of the mounting frame to serve as a button, and a first elastic member is disposed inside the pressing shaft, and the first elastic member is used to reset the pressing shaft in the axial direction;

[0015] The clamping shaft is coaxially connected to the pressing shaft, and the clamping shaft and the pressing shaft can move relative to each other in the axial direction. The first buckle groove and the second buckle groove are arranged on the clamping shaft. A second elastic member is arranged in the clamping shaft, and the second elastic member is used to reset the clamping shaft in the axial direction.

[0016] In one of the embodiments, a avoidance hole is provided at one end of the pressing shaft close to the clamping shaft, and the clamping shaft has an end face that abuts against the pressing shaft, and the end face and the avoidance hole form a second buckle groove; when the pressing shaft is rotated axially, the elastic buckle can be withdrawn to the outside of the avoidance hole.

[0017] In one embodiment, the locking shaft includes an extension section and a locking section, the outer diameter of the extension section is smaller than the outer diameter of the locking section, the extension section extends into the pressing shaft, and the first buckle groove is located on one side of the second buckle groove along the pressing direction of the pressing shaft.

[0018] In one embodiment, a first accommodating cavity is opened in the extending section, a partition section is arranged at one end of the first accommodating cavity close to the clamping section, the first elastic member is arranged in the first accommodating cavity, one end of the first elastic member abuts against the clamping section, and the other end abuts against the partition section.

[0019] In one embodiment, a second accommodating cavity is opened in the clamping section, the first accommodating cavity and the second accommodating cavity are separated by the partition section, the second elastic member is arranged in the second accommodating cavity, one end of the second elastic member abuts against the partition section, and the other end abuts against the mounting frame.

[0020] In one embodiment, the elastic buckle comprises an elastic section and a buckle arranged inside the elastic section, and the buckle has a limiting plane extending in the radial direction;

[0021] The first buckle groove includes a matching plane extending in the radial direction, and when the mounting shaft is in the first position, the limiting plane abuts against the matching plane;

[0022] When the installation shaft is in the second position, the limiting plane abuts against the end surface of the clamping shaft.

[0023] In one of the embodiments, the buckle has a pop-up surface, and along the pressing direction of the pressing axis, the pop-up surface gradually inclines toward the axis center of the clamping axis.

[0024] In one embodiment, the first buckle groove has a slide-out surface arranged opposite to the matching plane, and the slide-out surface is planar with the pop-up surface.

[0025] In one embodiment, the clamping shaft is provided with a first groove and a second groove which are interconnected, an end of the first groove away from the second groove passes through the clamping shaft, and an extending direction of the second groove is set at an angle to the axial direction;

[0026] A first protrusion is disposed on the inner side of the driven shaft, and the first protrusion cooperates with the second groove.

[0027] In one of the embodiments, the winding wheel includes a wheel body and a sleeve section arranged at one end of the wheel body, the sleeve section is sleeved outside the mounting shaft, the elastic buckle is arranged on the sleeve section, the sleeve section is provided with a guide groove extending along the axial direction, and a second protrusion is arranged on the clamping shaft, and the second protrusion is slidably arranged in the guide groove.

[0028] In one of the embodiments, the driven wheel is sleeved outside the sleeve 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 comprises an insertion tube and an operating handle arranged at one end of the insertion tube, a reversing device is arranged in the operating handle, a pull rope is wound on the winding wheel, and the pull rope is connected to a curved portion on the insertion tube.

[0030] The above-mentioned endoscope and the reversing mechanism in the operating handle thereof, when the mounting shaft is in the first position, the buckle on the winding wheel is engaged with the first buckle groove on the mounting shaft, that is, the mounting shaft can be fixed in the first position, and then the driven wheel on the mounting shaft is locked in the meshing position with the driving wheel, that is, the reversing mechanism in the operating handle is locked in the American hand operation state. When the mounting shaft moves axially to be in the second position, the buckle on the winding wheel is engaged with the second buckle groove on the mounting shaft, that is, the mounting shaft can be fixed in the second position, and then the driven wheel on the mounting shaft is stabilized in the meshing position with the driving wheel, that is, the reversing mechanism in the operating handle is locked in the European hand operation state. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

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

[0036] Figure 6 It is a structural schematic diagram of one viewing angle of the installation shaft in one embodiment.

[0037] Figure 7 It is a structural schematic diagram of another viewing angle of the installation shaft in one embodiment.

[0038] Reference numerals: 100, mounting frame; 200, mounting shaft; 210, pressing shaft; 211, avoidance hole; 220, clamping shaft; 221, first buckle groove; 2211, matching plane; 2212, sliding surface; 222, second buckle groove; 223, insertion section; 2231, first accommodating cavity; 224, clamping section; 2241, second accommodating cavity; 2242, end surface; 225, partition section; 250 , first elastic member; 260, second elastic member; 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-up surface; 330, wheel body; 340, sleeve section; 341, guide groove; 400, driven wheel; 500, driving wheel; 600, transmission wheel. DETAILED DESCRIPTION

[0039] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0040] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0041] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0042] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0043] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0044] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, 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 implementation method.

[0045] See also Figure 1 and Figure 2 , a reversing mechanism in an operating handle provided in one embodiment of the present application, the reversing mechanism in the operating handle 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 movably arranged on the mounting frame 100 along the axial direction, and the mounting shaft 200 has a first buckle groove 221 and a second buckle groove 222 arranged along the axial direction. The winding wheel 300 is sleeved outside the mounting shaft 200 and is axially fixed relative to the mounting frame 100, and the winding wheel 300 has an elastic buckle 310; the driven wheel 400 is sleeved outside the mounting shaft 200 and is axially fixed with the mounting shaft 200, and the driven wheel 400 rotates synchronously with the winding wheel 300; the driving wheel 500 rotates in the same direction or in the opposite direction as the driven wheel 400. Among them, the mounting shaft 200 has a first position and a second position that are movable along the axial direction, combined with Figure 1 In the first position, the driven wheel 400 and the driving wheel 500 rotate synchronously, and the elastic buckle 310 is engaged with the first buckle groove 221; Figure 2 In the second position, the driven wheel 400 and the driving wheel 500 rotate in opposite directions, and the elastic buckle 310 is engaged with the second buckle groove 222 on the mounting shaft 200.

[0046] It should be noted that the reversing mechanism in the operating handle of the present application is used to be installed in the operating handle of an 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 portion. A winding wheel 300 is provided in the operating handle. A pull rope is wound around the winding wheel 300. The other end of the pull rope passes through the insertion tube and is connected to the bending portion. When the winding wheel 300 rotates in different directions, the bending portion is driven to rotate in the opposite direction through the pull rope. However, the operating habits of American doctors and European doctors are different. The operating habit of European doctors is that when the operating lever is turned, the bending direction of the bending portion is the same as the rotation direction of the operating lever. The operating habit of American doctors is that when the operating lever is turned, the bending direction of the bending portion is opposite to the rotation direction of the operating lever. In order to facilitate the operation handle to meet the operating habits of American doctors and European doctors at the same time, a reversing mechanism is also provided in the operation handle. The reversing mechanism in the operation handle includes a mounting shaft 200, a driving wheel 500, a driven wheel 400 and a transmission wheel 600. The transmission wheel 600 is meshed with the driving wheel 500. The winding wheel 300 and the driven wheel 400 are simultaneously sleeved on the mounting shaft 200. When the mounting shaft 200 moves along the axial direction, it will switch from meshing with the driving wheel 500 to meshing with the transmission wheel 600. When the mounting shaft 200 is in the first position, it is suitable for the operating habits of American doctors. At this time, the driven wheel 400 is directly meshed with the driving wheel 500, and the rotation directions of the two are opposite, so that the rotation directions of the winding wheel 300 and the driving wheel 500 are opposite, that is, when the driving wheel 500 is rotated, the winding wheel 300 rotates in the opposite direction, thereby driving the bending part to rotate in the opposite direction. When the mounting shaft 200 is in the second position, it is suitable for the operating habits of European doctors. At this time, the driven wheel 400 is meshed with the driving wheel 500 through the transmission wheel 600, and the rotation directions of the driven wheel 400 and the driving wheel 500 are the same, thereby making the winding wheel 300 and the driving wheel 500 rotate in the same direction, that is, when the driving wheel 500 is rotated, the winding wheel 300 rotates in the same direction, thereby driving the bending part to rotate in the same direction.

[0047] In this embodiment, when the mounting shaft 200 is in the first position, the buckle 312 on the reel 300 is engaged with the first buckle groove 221 on the mounting shaft 200, so that the mounting shaft 200 can be fixed in the first position, and then the driven wheel 400 on the mounting shaft 200 is locked in the meshing position with the driving wheel 500, so that the reversing mechanism in the operating handle is locked in the American hand operation state. When the mounting shaft 200 moves axially to be in the second position, the buckle 312 on the reel 300 is engaged with the second buckle groove 222 on the mounting shaft 200, so that the mounting shaft 200 can be fixed in the second position, and then the driven wheel 400 on the mounting shaft 200 is stabilized in the meshing position with the transmission wheel 600, so that the reversing mechanism in the operating handle is locked in the European hand operation state.

[0048] In some embodiments, the mounting shaft 200 includes a pressing shaft 210 and a clamping shaft 220. One end of the pressing shaft 210 extends out of the mounting frame 100 to serve as a button, and a first elastic member 250 is disposed inside the pressing shaft 210, and the first elastic member 250 is used to reset the pressing shaft 210 in the axial direction; the clamping shaft 220 is coaxially connected to the pressing shaft 210, and the clamping shaft 220 and the pressing shaft 210 can move relative to each other in the axial direction, and a first buckle groove 221 and a second buckle groove 222 are disposed on the clamping shaft 220, and a second elastic member 260 is disposed inside the clamping shaft 220, and the second elastic member 260 is used to reset the clamping shaft 220 in the axial direction.

[0049] Part of the clamping shaft 220 is sleeved in the pressing shaft 210 , or part of the pressing shaft 210 is sleeved in the clamping shaft 220 to achieve a coaxial connection between the two. In the present application, one end of the clamping shaft 220 extends into the pressing shaft 210 .

[0050] In this embodiment, one end of the pressing shaft 210 extends outside the mounting frame 100. When the pressing shaft 210 is pressed, the pressing shaft 210 is used to drive the clamping shaft 220 to move axially, thereby enabling the clamping shaft 220 to switch from the first position to the second position. At the same time, after each position switching, the first elastic member 250 is used to make the pressing shaft 210 rebound to one end extending outside the mounting frame 100, so as to facilitate the next time the pressing shaft 210 continues to drive the clamping shaft 220 to switch positions. The second elastic member 260 is disposed in the clamping shaft 220. When the elastic buckle 310 is disengaged from the second buckle groove 222, the second elastic member 260 can make the clamping shaft 220 rebound to the first position.

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

[0052] Further, combined with Figure 3 and Figure 4 A avoidance hole 211 is provided at one end of the pressing shaft 210 close to the clamping shaft 220, and the clamping shaft 220 has an end face 2242 that abuts against the pressing shaft 210, and the end face 2242 and the avoidance hole 211 form a second buckle groove 222; when the pressing shaft 210 is rotated axially, the elastic buckle 310 can be withdrawn to the outside of the avoidance hole 211.

[0053] In this embodiment, the elastic buckle 310 is used to snap into the second buckle groove 222 from the avoidance hole 211. Therefore, when the pressing shaft 210 is rotated axially, the elastic buckle 310 can be withdrawn to the outside of the avoidance hole 211, thereby making the elastic buckle 310 disengaged from the second buckle groove 222, so as to facilitate the elastic buckle 310 to switch from the second buckle groove 222 to the first buckle groove 221.

[0054] Combination Figure 7 The side wall of the avoidance hole 211 along the circumferential direction and the end surface 2242 connected to the pressing shaft 210 are provided with rounded corners to facilitate the elastic buckle 310 to be rotated into the avoidance hole 211 or rotated out of the avoidance hole 211.

[0055] In some embodiments, the clamping shaft 220 includes an extension section 223 and a clamping section 224, the outer diameter of the extension section 223 is smaller than the outer diameter of the clamping section 224, the extension section 223 extends into the pressing shaft 210, and 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.

[0056] In this embodiment, the extending section 223 extends into the pressing shaft 210 , thereby realizing the axial connection between the clamping shaft 220 and the pressing shaft 210 , and the pressing shaft 210 can rotate relative to the clamping shaft 220 .

[0057] In actual use, combined with Figure 1 or Figure 3 , taking the initial state where the elastic buckle 310 is engaged with the first buckle groove 221 as an example, when it is necessary to switch to the elastic buckle 310 being engaged with the second buckle groove 222, first rotate the pressing shaft 210, thereby driving the avoidance 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, and then press the pressing shaft 210, the pressing shaft 210 moves downward, and the elastic buckle 310 is withdrawn to the outside of 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 snapped 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, so that the pressing shaft 210 moves downward and the elastic buckle 310 gradually withdraws from the first buckle groove 221 along the inclined direction of the sliding surface 2212.

[0059] In some embodiments, a first accommodating cavity 2231 is opened in the extension section 223, a partition section 225 is provided at one end of the first accommodating cavity 2231 close to the clamping section 224, and a first elastic member 250 is provided in the first accommodating cavity 2231, one end of the first elastic member 250 abuts against the clamping 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 clamping 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 be extended out of the mounting frame 100 after each pressing, so that the pressing shaft 210 can be directly rotated and pressed when switching the state next time.

[0061] Furthermore, a second accommodating cavity 2241 is opened in the clamping section 224, the first accommodating cavity 2231 and the second accommodating cavity 2241 are separated by the partition section 225, and the second elastic member 260 is arranged in the second accommodating cavity 2241, one end of the second elastic member 260 abuts against the partition section 225, and the other end abuts against the mounting frame 100.

[0062] When it is necessary to switch the elastic buckle 310 from the second buckle groove 222 to the first buckle groove 221, the pressing shaft 210 is also rotated to rotate the avoidance hole 211 to the side away from the elastic buckle 310, and then the pressing shaft 210 is pressed downward. The side wall of the pressing shaft 210 will push the elastic buckle 310 radially so that the elastic buckle 310 withdraws from the second buckle groove 222, and then under the elastic action of the second elastic member 260, the clamping shaft 220 can move to the side away from the pressing direction until the elastic buckle 310 is inserted into the first buckle groove 221.

[0063] Combination Figure 3 and Figure 4 In some embodiments, the elastic buckle 310 includes an elastic section 311 and a buckle 312 arranged on the inner side of the elastic section 311, and the buckle 312 has a limiting plane 3121 extending radially; the first buckle groove 221 includes a matching plane 2211 extending radially, and when the installation shaft 200 is in the first position, the limiting plane 3121 abuts against the matching plane 2211; when the installation shaft 200 is in the second position, the limiting plane 3121 abuts against the end face 2242 of the clamping shaft 220.

[0064] In this embodiment, the pressing shaft 210 is pressed axially to switch the elastic buckle 310 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 corresponding installation shaft 200 is in the first position, the limiting plane 3121 abuts against the end face 2242, that is, the abutting plane and the pressing direction are perpendicular to each other, thereby increasing the buckling stability between the elastic buckle 310 and the second buckle position. Similarly, the second buckle groove 222 includes a matching plane 2211 extending radially. When the installation shaft 200 is in the second position, the limiting plane 3121 abuts against the matching plane 2211, thereby increasing the buckling stability between the elastic buckle 310 and the second buckle position.

[0065] Furthermore, the buckle 312 has an ejection surface 3122, and along the pressing direction of the pressing shaft 210, the ejection surface 3122 gradually tilts toward the axis of the clamping shaft 220. When the pressing shaft 210 is pressed, the pressing shaft 210 can gradually push the elastic buckle 310 out of the first buckle groove 221 or the second buckle groove 222 through the ejection surface 3122.

[0066] Specifically, the buckle 312 is a right-angled triangular prism, one of the right-angled surfaces is connected to the elastic section 311 , the other right-angled surface serves as a limiting plane 3121 , and the inclined surface serves as a pop-up surface 3122 .

[0067] In some embodiments, in combination Figure 6 The clamping shaft 220 is provided with a first groove 271 and a second groove 272 which are interconnected. The end of the first groove 271 away from the second groove 272 passes through the clamping shaft 220, and the extension direction of the second groove 272 is set at an angle to the axial direction; a first protrusion is set on the inner side of the driven wheel 400, and the first protrusion 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 clamping shaft 220, so that the first protrusion on the driven wheel 400 can enter the second groove 272 from the first groove 271, and the extension direction of the second groove 272 is set at an angle to the axial direction, that is, when the clamping shaft 220 moves axially, the upper and lower side walls of the second groove 272 can push the first protrusion, thereby making the driven wheel 400 and the clamping shaft 220 move up and down synchronously, so as to facilitate the driven wheel 400 to switch between the transmission wheel 600 and the driving wheel 500.

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

[0070] In some embodiments, in combination Figure 5 The winding wheel 300 includes a wheel body 330 and a sleeve section 340 arranged at one end of the wheel body 330, the sleeve section 340 is sleeved outside the mounting shaft 200, the elastic buckle 310 is arranged on the sleeve section 340, the sleeve section 340 is provided with a guide groove 341 extending along the axial direction, and a second protrusion 280 is arranged on the clamping shaft 220, and the second protrusion 280 is slidably arranged in the guide groove 341.

[0071] In this embodiment, the sleeve section 340 is provided with a guide groove 341 extending in the axial direction, and the clamping shaft 220 is provided with a second protrusion 280, which is slidably arranged in the guide groove 341, that is, the clamping shaft 220 can move in the axial direction relative to the winding wheel 300, and at the same time, the winding wheel 300 is axially fixed on the mounting frame 100, so the clamping shaft 220 can move in the axial direction relative to the mounting frame 100. At the same time, the elastic buckle 310 is arranged on the sleeve section 340, so when the clamping shaft 220 moves in the axial direction, 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 at 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 set in the guide groove 341, and 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 clamping shaft 220 moves axially, the second protrusion 280 can push the driven wheel 400 to move axially.

[0074] Combination Figure 2 As shown, an embodiment of the present application also provides an endoscope, including an insertion tube and an operating handle arranged at one end of the insertion tube, a reversing device of the operating handle is arranged in the operating handle, a pull rope is wound on the winding wheel 300, and the pull rope is connected to the curved part on the insertion tube.

[0075] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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 above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A reversing mechanism in an operating handle, characterized in that: The reversing mechanism comprises: Mounting frame; A mounting shaft is movably arranged on the mounting frame along the axial direction, and the mounting shaft has a first buckle groove and a second buckle groove arranged along the axial direction; A winding wheel, which is sleeved outside the mounting shaft and fixed axially relative to the mounting frame, and the winding wheel has an elastic buckle; A driven wheel is sleeved outside the mounting shaft and is axially fixed to the mounting shaft, and the driven wheel rotates synchronously with the winding wheel; A driving wheel, rotating in the same direction or in the opposite direction as the driven wheel; Wherein, the mounting shaft has a first position and a second position that move along the axial direction. In the first position, the driven wheel and the driving wheel rotate in opposite directions, and the elastic buckle is engaged with the first buckle groove; in the second position, the driven wheel and the driving wheel rotate in the same direction, and the elastic buckle is engaged with the second buckle groove on the mounting shaft.

2. The reversing mechanism in the operating handle according to claim 1, characterized in that: The mounting shaft comprises: A pressing shaft, one end of which extends out of the mounting frame to serve as a button, and a first elastic member is disposed inside the pressing shaft, and the first elastic member is used to reset the pressing shaft in the axial direction; The clamping shaft is coaxially connected to the pressing shaft, and the clamping shaft and the pressing shaft can move relative to each other in the axial direction. The first buckle groove and the second buckle groove are arranged on the clamping shaft. A second elastic member is arranged in the clamping shaft, and the second elastic member is used to reset the clamping shaft in the axial direction.

3. The reversing mechanism in the operating handle according to claim 2, characterized in that: An avoidance hole is provided at one end of the pressing shaft close to the clamping shaft, and the clamping shaft has an end face that abuts against the pressing shaft, and the end face and the avoidance hole form a second buckle groove; when the pressing shaft is rotated axially, the elastic buckle can be withdrawn to the outside of the avoidance hole.

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

5. The reversing mechanism in the operating handle according to claim 4, characterized in that: A first accommodating cavity is provided in the extending section, a partition section is provided at one end of the first accommodating cavity close to the clamping section, the first elastic member is provided in the first accommodating cavity, one end of the first elastic member abuts against the clamping section, and the other end abuts against the partition section.

6. The reversing mechanism in the operating handle according to claim 5, characterized in that: A second accommodating cavity is provided in the clamping section, the first accommodating cavity and the second accommodating cavity are separated by the partition section, the second elastic member is arranged in the second accommodating cavity, one end of the second elastic member abuts against the partition section, and the other end abuts against the mounting frame.

7. The reversing mechanism in the operating handle according to claim 2, characterized in that: The elastic buckle comprises an elastic section and a buckle arranged inside the elastic section, and the buckle has a limiting plane extending in the radial direction; The first buckle groove includes a matching plane extending in the radial direction, and when the mounting shaft is in the first position, the limiting plane abuts against the matching plane; When the installation shaft is in the second position, the limiting plane abuts against the end surface of the clamping shaft.

8. The reversing mechanism in the operating handle according to claim 2, characterized in that: The buckle has an ejection surface, and along the pressing direction of the pressing shaft, the ejection surface gradually inclines toward the axis of the clamping shaft.

9. The reversing mechanism in the operating handle according to claim 8, characterized in that: The first buckle groove has a slide-out surface arranged opposite to the matching plane, and the slide-out surface is in plane with the pop-up surface.

10. The reversing mechanism in the operating handle according to claim 2, characterized in that: The clamping shaft is provided with a first groove and a second groove which are interconnected, an end of the first groove away from the second groove passes through the clamping shaft, and an extending direction of the second groove is arranged at an angle to the axial direction; A first protrusion is disposed on the inner side of the driven shaft, and the first protrusion cooperates with the second groove.

11. The reversing mechanism in the operating handle according to claim 10, characterized in that: The winding wheel includes a wheel body and a sleeve section arranged at one end of the wheel body, the sleeve section is sleeved outside the mounting shaft, the elastic buckle is arranged on the sleeve section, the sleeve section is provided with a guide groove extending along the axial direction, the clamping shaft is provided with a second protrusion, and the second protrusion is slidably arranged in the guide groove.

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

13. An endoscope, characterized in that: It comprises an insertion tube and an operating handle arranged at one end of the insertion tube, wherein the operating handle is provided with a reversing device of the operating handle according to any one of claims 1 to 12, a pull rope is wound on the winding wheel, and the pull rope is connected to the curved portion on the insertion tube.

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