Reversing mechanism in endoscope and its operating handle

Abstract

The application relates to an endoscope and a reversing mechanism in an operating handle thereof. The reversing mechanism in the operating handle comprises a mounting frame, a mounting shaft, a winding wheel, 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 buckle groove and a second buckle groove arranged in the axial direction. The winding wheel is sleeved outside the mounting shaft and fixed in the axial direction relative to the mounting frame, and the winding wheel is provided with an elastic buckle. The driven wheel is sleeved outside the mounting shaft and fixed in the axial direction with the mounting shaft, and the driven wheel rotates synchronously with the winding wheel. The mounting shaft has a first position and a second position in the axial direction. When the mounting shaft is in the first position, the driven wheel rotates synchronously with the driving wheel, the elastic buckle is buckled with the first buckle groove, so that the reversing mechanism in the operating handle is locked in the American hand operation state. When the mounting shaft is in the second position, the driven wheel rotates reversely with the driving wheel, the elastic buckle is buckled with the second buckle groove, so that the reversing mechanism in the operating handle is locked in the European hand operation state.

Description

TECHNICAL FIELD

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

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

[0003] In the related art, a reversing mechanism is arranged 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 European hands to the operating state of American hands.

[0004] However, the reversing mechanism in the operating handle cannot be well stabilized in the operating state of European hands or the operating state of American hands after reversing. SUMMARY

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

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

[0007] a mounting frame;

[0008] a mounting shaft movably arranged on the mounting frame in an axial direction, the mounting shaft having a first clamping groove and a second clamping groove arranged in an axial direction;

[0009] a winding wheel sleeved outside the mounting shaft and fixed in an axial direction relative to the mounting frame, the winding wheel having an elastic clamping part;

[0010] a driven wheel sleeved outside the mounting shaft and fixed in an axial direction with the mounting shaft, the driven wheel being synchronously rotated with the winding wheel;

[0011] a driving wheel being synchronously rotated or reversely rotated with the driven wheel;

[0012] The mounting shaft has a first position and a second position in the axial direction, in the first position, the driven wheel rotates reversely with the driving wheel, the elastic buckle is in engagement with the first buckle slot, in the second position, the driven wheel rotates in the same direction with the driving wheel, the elastic buckle is in engagement with the second buckle slot on the mounting shaft.

[0013] In one of the embodiments, the mounting shaft comprises:

[0014] The pressing shaft has one end extending out of the mounting frame as a button, the first elastic member is arranged in the pressing shaft to reset the pressing shaft in the axial direction;

[0015] The clamping shaft is coaxially connected with the pressing shaft, the clamping shaft and the pressing shaft can move in the axial direction, the first buckle slot and the second buckle slot are arranged on the clamping shaft, the second elastic member is arranged in the clamping shaft to reset the clamping shaft in the axial direction.

[0016] In one of the embodiments, the pressing shaft has an avoiding hole arranged at one end close to the clamping shaft, the clamping shaft has an end surface abutting against the pressing shaft, the end surface and the avoiding hole form the second buckle slot, when the pressing shaft rotates in the axial direction, the elastic buckle can exit out of the avoiding hole.

[0017] In one of the embodiments, the clamping shaft comprises a protruding section and a clamping section, the protruding section has an outer diameter smaller than that of the clamping section, the protruding section protrudes into the pressing shaft, the first buckle slot is arranged on one side of the second buckle slot in the pressing direction of the pressing shaft.

[0018] In one of the embodiments, the protruding section has a first accommodating cavity, the first accommodating cavity has a partition section arranged at one end 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 of the embodiments, the clamping section has a second accommodating cavity, 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 of the embodiments, the elastic buckle comprises an elastic section and a buckle arranged inside the elastic section, the buckle has a limiting plane extending in the radial direction;

[0021] The first buckle slot comprises a matching plane extending in the radial direction, in the first position of the mounting shaft, the limiting plane abuts against the matching plane.

[0022] The limiting plane is in abutment with the end face of the clamping shaft when the mounting shaft is in the second position.

[0023] In one of the embodiments, the clasp has a pop-up surface which gradually inclines towards the shaft center of the clamping shaft along the pressing direction of the pressing shaft.

[0024] In one of the embodiments, the first clasp slot has a sliding-out surface which is arranged opposite to the matching plane, and the pressing shaft moves downwards to gradually make the elastic clasp exit to the outside of the first clasp slot along the inclining direction of the sliding-out surface.

[0025] In one of the embodiments, the clamping shaft is provided with a first slot and a second slot which are in communication with each other, and the first slot penetrates through the clamping shaft from the end away from the second slot, and the extending direction of the second slot is arranged at an angle with the shaft direction.

[0026] The inner side of the driven wheel is provided with a first protrusion which is matched with the second slot.

[0027] In one of the embodiments, the winding wheel comprises a wheel body and a sleeving section arranged at one end of the wheel body, the sleeving section is sleeved outside the mounting shaft, the elastic clasp is arranged on the sleeving section, the sleeving section is provided with a guide slot extending along the shaft direction, and the clamping shaft is provided with a second protrusion which is slidably arranged in the guide slot.

[0028] In one of the embodiments, the driven wheel is sleeved outside the sleeving section, and the second protrusion is located at one side of the second slot along the pressing direction.

[0029] An endoscope, characterized in that it comprises an insertion tube and an operating handle arranged at one end of the insertion tube, the operating handle is provided with a reversing device inside, the winding wheel is wound with a pull rope, and the pull rope is connected with a bending part on the insertion tube.

[0030] The endoscope and the reversing mechanism in the operating handle thereof are characterized in that when the mounting shaft is in the first position, the clasp on the winding wheel is clamped with the first clasp slot on the mounting shaft, so that the mounting shaft is fixed in the first position, and the driven wheel on the mounting shaft is locked in the meshing position with the driving wheel, and the reversing mechanism in the operating handle is locked in the American hand operating state. When the mounting shaft is moved along the shaft direction to be in the second position, the clasp on the winding wheel is clamped with the second clasp slot on the mounting shaft, so that the mounting shaft is fixed in the second position, and the driven wheel on the mounting shaft is stably locked in the meshing position with the driving wheel, and the reversing mechanism in the operating handle is locked in the European hand operating state. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 This 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 This 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 This 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 shaft is in the first position.

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

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

[0037] Figure 7 This 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 the application, it should be understood that, if there are these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0041] In addition, if there are these terms "first", "second", these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the application, if the term "multiple" appears, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise explicitly specified.

[0042] In this application, unless otherwise explicitly specified and limited, if there are terms such as "mounting", "connecting", "connecting", "fixing" and the like, these terms should be broadly understood. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0043] In this application, unless otherwise explicitly specified and limited, if there are similar descriptions such as "first feature on" or "under" the second feature, the meaning can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0044] It is to be noted that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. In addition, it is to be understood that when an element such as a layer, film, region, or substrate is referred to as being "connected", "attached", or "coupled" to another element, it can be directly connected, attached, or coupled to the other element, or intervening elements can be present. As used herein including the claims, "and / or" means and. "or", one or both being employable depending on the intent of the person of ordinary skill in the art.

[0045] Referring to Figure 1 and Figure 2 , an embodiment of the present application provides a reversing mechanism in an operating handle, the reversing mechanism in the operating handle comprising 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 an axial direction, and the mounting shaft 200 has a first clamping groove 221 and a second clamping groove 222 arranged along the axial direction. The winding wheel 300 is sleeved on the mounting shaft 200 and is fixed along the axial direction relative to the mounting frame 100, and the winding wheel 300 has an elastic clamping piece 310. The driven wheel 400 is sleeved on the mounting shaft 200 and is fixed along the axial direction 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 reversely with the driven wheel 400. The mounting shaft 200 has a first position and a second position along the axial direction, and in combination Figure 1 , when the mounting shaft 200 is at the first position, the driven wheel 400 rotates synchronously with the driving wheel 500, and the elastic clamping piece 310 is clamped with the first clamping groove 221. Figure 2 , when the mounting shaft 200 is at the second position, the driven wheel 400 reversely rotates with the driving wheel 500, and the elastic clamping piece 310 is clamped with the second clamping 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 comprising an operating handle and an insertion tube, one end of the insertion tube being connected with the operating handle, the other end being provided with a bending part, a winding wheel 300 being arranged in the operating handle, a pull rope being wound on the winding wheel 300, the other end of the pull rope being connected with the bending part through the insertion tube, when the winding wheel 300 rotates towards different directions, the bending part is driven to rotate towards opposite directions through the pull rope. The operation habits of American doctors and European doctors are different, the operation habit of European doctors is that when the operating lever is rotated, the bending direction of the bending part is the same as the rotating direction of the operating lever, the operation habit of American doctors is that when the operating lever is rotated, the bending direction of the bending part is opposite to the rotating direction of the operating lever. In order to facilitate the operating handle to meet the operation habits of American doctors and European doctors at the same time, the reversing mechanism in the operating handle is further arranged in the operating handle, the reversing mechanism in the operating handle comprising a mounting shaft 200, a driving wheel 500, a driven wheel 400 and a transmission wheel 600, the transmission wheel 600 being engaged with the driving wheel 500, the winding wheel 300 and the driven wheel 400 being simultaneously sleeved on the mounting shaft 200, when the mounting shaft 200 moves along the axial direction, it will be switched from being engaged with the driving wheel 500 to being engaged with the transmission wheel 600. When the mounting shaft 200 is at the first position, it is suitable for the operation habit of American doctors, at this time, the driven wheel 400 is directly engaged with the driving wheel 500, the rotating directions of the two are opposite, thereby making the rotating direction of the winding wheel 300 opposite to that of the driving wheel 500, that is, when the driving wheel 500 is rotated, the winding wheel 300 is rotated in the opposite direction, thereby driving the bending part to rotate in the opposite direction. When the mounting shaft 200 is at the second position, it is suitable for the operation habit of European doctors, at this time, the driven wheel 400 is engaged with the driving wheel 500 through the transmission wheel 600, the rotating directions of the driven wheel 400 and the driving wheel 500 are the same, thereby making the rotating direction of the winding wheel 300 the same as that of the driving wheel 500, that is, when the driving wheel 500 is rotated, the winding wheel 300 is rotated in the same direction, thereby driving the bending part to rotate in the same direction.

[0047] In the present embodiment, when the mounting shaft 200 is at the first position, the buckle 312 on the winding wheel 300 is clamped with the first buckle groove 221 on the mounting shaft 200, that is, the mounting shaft 200 can be fixed at the first position, thereby making the driven wheel 400 on the mounting shaft 200 locked at the engagement position with the driving wheel 500, that is, the reversing mechanism in the operating handle is locked at the American hand operation state. When the mounting shaft 200 moves along the axial direction to be at the second position, the buckle 312 on the winding wheel 300 is clamped with the second buckle groove 222 on the mounting shaft 200, that is, the mounting shaft 200 can be fixed at the second position, thereby making the driven wheel 400 on the mounting shaft 200 stably engaged with the transmission wheel 600, that is, the reversing mechanism in the operating handle is locked at the European hand operation state.

[0048] In some embodiments, the mounting shaft 200 comprises 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 arranged in the pressing shaft 210 to enable the pressing shaft 210 to be axially reset; the clamping shaft 220 is coaxially connected with the pressing shaft 210, the clamping shaft 220 and the pressing shaft 210 can move relative to each other in the axial direction, a first clamping groove 221 and a second clamping groove 222 are arranged on the clamping shaft 220, and a second elastic member 260 is arranged in the clamping shaft 220 to enable the clamping shaft 220 to be axially reset.

[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 coaxial connection of the two. In this 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 out of the mounting frame 100, and when the pressing shaft 210 is pressed, the pressing shaft 210 is used to drive the clamping shaft 220 to move in the axial direction, so that the clamping shaft 220 can be switched 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 the end extending out of the mounting frame 100, so as to facilitate the next time to continue to drive the clamping shaft 220 to switch the position through the pressing shaft 210. The second elastic member 260 is arranged in the clamping shaft 220, and when the elastic clamping buckle 310 is separated from the second clamping 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 comprises a shaft body and a button connected in sequence, one end of the button is used to be clamped with the mounting frame 100 to prevent the button from coming 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, in combination with Figure 3 and Figure 4 , the end of the pressing shaft 210 close to the clamping shaft 220 is provided with a avoiding hole 211, the clamping shaft 220 has an end face 2242 abutting against the pressing shaft 210, the end face 2242 and the avoiding hole 211 form the second clamping groove 222; when the pressing shaft 210 is rotated in the axial direction, the elastic clamping buckle 310 can exit out of the avoiding hole 211.

[0053] In this embodiment, the elastic clamping buckle 310 is used to be clamped into the second clamping groove 222 from the avoiding hole 211, so when the pressing shaft 210 is rotated in the axial direction, the elastic clamping buckle 310 can be made to exit out of the avoiding hole 211, so that the elastic clamping buckle 310 is separated from the second clamping groove 222, so as to facilitate the elastic clamping buckle 310 to be switched from the second clamping groove 222 to the first clamping groove 221.

[0054] In combination Figure 7 The circumferential side wall of the avoiding hole 211 is provided with a rounded corner at the end surface 2242 connected with the pressing shaft 210, which facilitates the rotation of the elastic buckle 310 into or out of the avoiding hole 211.

[0055] In some embodiments, the clamping shaft 220 comprises a stretching-in section 223 and a clamping section 224, the outer diameter of the stretching-in section 223 is smaller than that of the clamping section 224, the stretching-in section 223 stretches into the pressing shaft 210, and the first buckle groove 221 is located at one side of the second buckle groove 222 along the pressing direction of the pressing shaft 210.

[0056] In the present embodiment, the stretching-in section 223 stretches into the pressing shaft 210, thereby realizing the axial connection between the clamping shaft 220 and the pressing shaft 210, and meanwhile the pressing shaft 210 can rotate relative to the clamping shaft 220.

[0057] In actual use, in combination Figure 1 or Figure 3 Taking the initial state that the elastic buckle 310 is buckled with the first buckle groove 221 as an example, when it is needed to switch to the state that the elastic buckle 310 is buckled with the second buckle groove 222, the pressing shaft 210 is first rotated, thereby driving the avoiding hole 211 to rotate, so that the second buckle groove 222 is located at one side of the first buckle groove 221 along the axial direction, and then the pressing shaft 210 is pressed, the pressing shaft 210 moves downward, thereby making the elastic buckle 310 exit out of the first buckle groove 221, and since the first buckle groove 221 is located at one side of the second buckle groove 222 along the pressing direction of the pressing shaft 210, the elastic buckle 310 can be buckled into the second buckle groove 222.

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

[0059] In some embodiments, the stretching-in section 223 is provided with a first accommodating cavity 2231, and a partition section 225 is arranged at one end of the first accommodating cavity 2231 close to the clamping section 224, a first elastic member 250 is arranged 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 the present 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, the end of the pressing shaft 210 can be stretched out of the mounting frame 100 after each pressing, thereby facilitating the rotation and pressing of the pressing shaft 210 in the next state switching.

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

[0062] When it is needed 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 avoiding hole 211 to the side far away from the elastic buckle 310, and then the pressing shaft 210 is pressed downward, the side wall of the pressing shaft 210 can push the elastic buckle 310 in the radial direction to make the elastic buckle 310 exit to the outside of 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 far away from the pressing direction until the elastic buckle 310 enters into the first buckle groove 221.

[0063] In combination Figure 3 and Figure 4 In some embodiments, the elastic buckle 310 comprises an elastic section 311 and a buckle 312 arranged inside the elastic section 311, the buckle 312 has a limiting plane 3121 extending in the radial direction; the first buckle groove 221 comprises a matching plane 2211 extending in the radial direction, when the mounting shaft 200 is in the first position, the limiting plane 3121 abuts against the matching plane 2211; when the mounting shaft 200 is in the second position, the limiting plane 3121 abuts against the end face 2242 of the clamping shaft 220.

[0064] In the embodiment, the pressing shaft 210 is pressed in the axial direction 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 in the radial direction, when the mounting shaft 200 is in the first position, the limiting plane 3121 abuts against the end face 2242, that is, the abutting planes are perpendicular to each other in the pressing direction, thereby the stability of the buckling of the elastic buckle 310 and the second buckle can be increased. Similarly, the second buckle groove 222 comprises the matching plane 2211 extending in the radial direction, when the mounting shaft 200 is in the second position, the limiting plane 3121 abuts against the matching plane 2211, thereby the stability of the buckling of the elastic buckle 310 and the second buckle can be increased.

[0065] Further, the buckle 312 has a pop-up surface 3122, along the pressing direction of the pressing shaft 210, the pop-up surface 3122 gradually inclines to 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 to exit to the outside of the first buckle groove 221 or the second buckle groove 222 through the pop-up surface 3122.

[0066] Specifically, the buckle 312 is a right-angled triangular prism, one of the right-angled faces is connected with the elastic section 311, the other right-angled face is a limiting plane 3121, and the inclined face is a pop-up face 3122.

[0067] In some embodiments, in combination Figure 6 The clamping shaft 220 is provided with a first slot 271 and a second slot 272 which are in communication with each other, one end of the first slot 271 away from the second slot 272 penetrates through the clamping shaft 220, and the extension direction of the second slot 272 is arranged at an angle with the axial direction; the inner side of the driven wheel 400 is provided with a first protrusion which cooperates with the second slot 272.

[0068] In this embodiment, one end of the first slot 271 away from the second slot 272 penetrates through the clamping shaft 220, so that the first protrusion on the driven wheel 400 can enter the second slot 272 from the first slot 271, and the extension direction of the second slot 272 is arranged at an angle with the axial direction, that is, when the clamping shaft 220 moves along the axial direction, the upper and lower sidewalls of the second slot 272 can push the first protrusion, so that the driven wheel 400 moves up and down synchronously with the clamping shaft 220, facilitating the switching of the driven wheel 400 between the transmission wheel 600 and the driving wheel 500.

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

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

[0071] In this embodiment, the sleeving section 340 is provided with a guide slot 341 extending along the axial direction, and the clamping shaft 220 is provided with a second protrusion 280 which is slidingly arranged in the guide slot 341, that is, the clamping shaft 220 can move along the axial direction relative to the winding wheel 300, and at the same time, the winding wheel 300 is fixed along the axial direction on the mounting frame 100, so that the clamping shaft 220 can move along the axial direction relative to the mounting frame 100. At the same time, the elastic buckle 310 is arranged on the sleeving section 340, so that when the clamping shaft 220 moves along the axial direction, the elastic buckle 310 can be switched between the first buckle slot 221 and the second buckle slot 222.

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

[0073] In the embodiment, the second protrusion 280 is located at one side of the second groove 272 along the pressing direction, and the second protrusion 280 is slidingly arranged in the guide groove 341 extending along the axial direction, so that the second groove 272 is located in the projection range of the guide groove 341 along the radial direction, and the second protrusion 280 can push the driven wheel 400 to move along the axial direction when the clamping shaft 220 moves along the axial direction.

[0074] In combination Figure 2 As shown in the drawings, the embodiment of the present application also provides an endoscope, which comprises an insertion tube and an operation handle arranged at one end of the insertion tube, a reversing device of the operation handle is arranged in the operation handle, a winding wheel 300 is wound with a pull rope, and the pull rope is connected with a bending part on the insertion tube.

[0075] The technical features of the above embodiments can be combined arbitrarily, and in order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, it should be considered that they are within the scope of the present application.

[0076] The above embodiments only express several implementation manners of the present application, the description is more specific and detailed, but it should not be understood as a limitation on the patent application scope. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to 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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