Endoscope

Abstract

The present application relates to an endoscope, which includes a reversing device, which includes a transmission assembly, a switching button, and a winding wheel. The transmission assembly has a first transmission state and a second transmission state. The transmission assembly includes a driving wheel group, a transmission wheel group, and a driven wheel group. The driven wheel group is used to drive the winding wheel to rotate in the same direction. When the transmission assembly is in the first transmission state, the driving wheel group is meshed with the driven wheel group. At this time, it can be suitable for doctors with American hand usage habits to operate. Pressing the switching button is used to switch the transmission assembly from the first transmission state to the second transmission state. When the transmission assembly is in the second transmission state, the driving wheel group is meshed with the transmission wheel group, and the transmission wheel group is meshed with the driven wheel group. At this time, it can be suitable for doctors with European hand usage habits to operate.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to endoscopes. Background Art

[0002] The endoscope includes a handle operating part and an insertion tube connected to the handle operating part. 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 bending part of the insertion tube is controlled by the joystick of the handle operating part. When the joystick is turned in a certain direction, the bending part will bend in a corresponding fixed direction. Among them, the operating habit of European doctors is that when the joystick is turned, the bending direction of the bending part is the same as the turning direction of the joystick, and the operating habit of American doctors is that when the joystick is turned, the bending direction of the bending part is opposite to the turning direction of the joystick.

[0003] However, since the bending direction of the bending portion is fixed when the joystick is operated, it is unable to simultaneously meet the usage habits of doctors in Europe and America. Summary of the invention

[0004] Based on this, it is necessary to provide an endoscope to address the problem that endoscopes in related technologies cannot simultaneously meet the usage habits of doctors in two different places, Europe and America.

[0005] An endoscope comprises an insertion tube and an operating handle arranged at one end of the insertion tube, wherein 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;

[0006] The reversing device comprises a reversing mechanism, a switching button and a winding wheel, the reversing mechanism has a first transmission state and a second transmission state, the reversing mechanism comprises a driving wheel group, a transmission wheel group and a driven wheel group, and the driven wheel group is used to drive the winding wheel to rotate in the same direction;

[0007] When the reversing mechanism is in the first transmission state, the driving wheel group is meshed with the driven wheel group; pressing or turning the switching button is used to switch the reversing mechanism from the first transmission state to the second transmission state. When the reversing mechanism is in the second transmission state, the driving wheel group is meshed with the driven wheel group through the transmission wheel group.

[0008] In one embodiment, the driving wheel group includes a driving shaft, a first driving wheel and a second driving wheel sequentially sleeved on the driving shaft, and at least one end of the driving shaft is provided with a knob;

[0009] When the reversing mechanism is in the first transmission state, the first driving wheel is meshed with the driven wheel set; when the reversing mechanism is in the second transmission state, the second driving wheel is meshed with the transmission wheel set.

[0010] In one embodiment, the driven wheel assembly includes a driven shaft and a driven wheel sleeved on the driven shaft, the switch button is connected to the driven shaft, and the switch button is used to drive the driven wheel to move axially along the driven shaft.

[0011] In one embodiment, the transmission wheel assembly includes a transmission shaft and a transmission wheel sleeved on the transmission shaft, the driven shaft, the transmission shaft and the driving shaft are arranged in parallel, and the transmission wheel is meshed with the second driving wheel.

[0012] In one embodiment, the first driving wheel and the second driving wheel have the same diameter, and the driven shaft, the transmission shaft, and the driving shaft are not collinear in the axial projection along the driving wheel.

[0013] In one embodiment, there are two transmission wheels, and the two transmission wheels rotate synchronously, wherein one of the transmission wheels is used to mesh with the driven wheel, and the other transmission wheel is meshed with the second driving wheel.

[0014] In one embodiment, the diameter of the first driving wheel is greater than the diameter of the second driving wheel, and the number of the transmission wheel is one.

[0015] In one of the embodiments, the winding wheel is arranged in a fixed sleeve outside the driven shaft, and the driven wheel is matched with the driven shaft in the radial direction.

[0016] In one embodiment, the driven wheel assembly includes a driven shaft and a first driven wheel and a second driven wheel sequentially sleeved on the driven shaft, the driving wheel assembly includes a driving shaft and a driving wheel sleeved on the driving shaft, and the switching button is used to drive the driving wheel to move along the axial direction of the driving shaft;

[0017] When the reversing mechanism is in the first transmission state, the driving wheel is meshed with the first driven wheel; when the reversing mechanism is in the second transmission state, the driving wheel is meshed with the second driven wheel through the transmission wheel set.

[0018] The above-mentioned endoscope has a reversing mechanism with a first transmission state and a second transmission state. When the reversing mechanism is in the first transmission state, the driving wheel group is meshed with the driven wheel group. When the driving wheel group is rotated, the driving wheel group is used to drive the driven wheel group to rotate in the opposite direction, and the driven wheel group drives the winding wheel to rotate in the opposite direction. At this time, it is suitable for doctors who are used to using American hands. After pressing the switching button, the reversing mechanism switches from the first transmission state to the second transmission state. At this time, the driving wheel group is meshed with the transmission wheel group, and the transmission wheel group is meshed with the driven wheel group. The driving wheel group and the transmission wheel group have opposite rotation directions, and the transmission wheel group and the driven wheel group have opposite rotation directions, that is, the driving wheel group and the driven wheel group have the same rotation direction. When the driving wheel group is rotated, the driving wheel group is used to drive the driven wheel to rotate in the same direction, and the driven wheel group drives the winding wheel to rotate in the same direction. At this time, it is suitable for doctors who are used to using European hands. That is, the switching between the use mode of American hands and European hands can be realized by only pressing the switching button, and the structure is simple and easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] FIG1 is a schematic structural diagram of a reversing device disposed in a housing when a transmission assembly has a first transmission state in an embodiment.

[0020] FIG2 is a schematic structural diagram of an embodiment in which a reversing device is arranged in a housing when the transmission assembly has a second transmission state.

[0021] FIG. 3 is a schematic structural diagram of the reversing device in FIG. 2 .

[0022] FIG. 4 is a bottom view of the reversing device in FIG. 2 .

[0023] FIG. 5 is a schematic cross-sectional view of the reversing device in FIG. 2 disposed in a housing.

[0024] FIG. 6 is a schematic diagram of the exploded structure of a driven wheel assembly in one embodiment.

[0025] FIG. 7 is a schematic structural diagram of the fixing block in FIG. 6 .

[0026] FIG8 is a schematic diagram of the exploded structure of a driven wheel assembly in another embodiment.

[0027] 1. The locating pin of the embodiment of the present invention is as follows: 100, driven shaft; 120, inner shaft; 121, matching groove; 1211, insertion groove section; 1212, positioning groove section; 123, positioning pin; 128, strip groove; 130, outer shaft; 131, air-avoiding groove; 132, strip-shaped protrusion; 138, slot; 140, fixing block; 141, first protrusion; 142, second protrusion; 150, switching button; 200, driving wheel group; 210, driving shaft; 220, first driving wheel; 230, second driving wheel; 240, knob; 300, driven wheel group; 310, driven wheel; 311, positioning column; 400, transmission wheel group; 410, transmission shaft; 420, transmission wheel; 500, winding wheel; 600, housing; 610, mounting groove; 620, embedding groove. DETAILED DESCRIPTION

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] An embodiment of the present application further provides an endoscope, including an insertion tube and an operating handle arranged on the insertion tube, a reversing device is arranged in the operating handle, a pull rope is wound on the winding wheel 500, and the pull rope is connected to the curved portion on the insertion tube.

[0035] The reversing device includes a transmission assembly, a switching button 150 and a winding wheel 500. The transmission assembly has a first transmission state and a second transmission state. The transmission assembly includes a driving wheel group 200, a transmission wheel group 400 and a driven wheel group 300. The driven wheel group 300 is used to drive the winding wheel 500 to rotate in the same direction. When the transmission assembly is in the first transmission state, the driving wheel group 200 is meshed with the driven wheel group 300; pressing or rotating the switching button 150 is used to switch the transmission assembly from the first transmission state to the second transmission state. When the transmission assembly is in the second transmission state, the driving wheel group 200 is meshed with the driven wheel group 300 through the transmission wheel group 400.

[0036] In this embodiment, the transmission assembly has a first transmission state and a second transmission state. In conjunction with FIG1 , when the transmission assembly is in the first transmission state, the driving wheel set 200 is meshed with the driven wheel set 300. When the driving wheel set 200 is rotated, the driving wheel set 200 is used to drive the driven wheel set 300 to rotate in the opposite direction, and the driven wheel set 300 drives the winding wheel 500 to rotate in the opposite direction. At this time, it is suitable for doctors who are used to using American hands. After pressing the switching button 150, the transmission assembly switches from the first transmission state to the second transmission state. At this time, in conjunction with FIG2 , the driving wheel set 200 is meshed with the transmission wheel set 400, and the transmission wheel set 400 is meshed with the driven wheel set 300. The driving wheel set 200 rotates in opposite directions to the transmission wheel set 400, and the transmission wheel set 400 rotates in opposite directions to the driven wheel set 300, that is, the driving wheel set 200 rotates in the same direction as the driven wheel set 300. When the driving wheel set 200 is rotated, the driving wheel set 200 is used to drive the driven wheel 310 to rotate in the same direction, and the driven wheel set 300 drives the winding wheel 500 to rotate in the same direction. At this time, it is suitable for doctors who are used to using European hands. That is, only by pressing the switching button 150, the use mode of American hand and European hand can be switched, and the structure is simple and easy to operate.

[0037] In some embodiments, in conjunction with Figures 1 to 3, the driving wheel set 200 includes a driving shaft 210, a first driving wheel 220 and a second driving wheel 230 sequentially sleeved on the driving shaft 210, and at least one end of the driving shaft 210 is provided with a knob 240. When the transmission assembly is in the first transmission state, the first driving wheel 220 is meshed with the driven wheel set 300; when the transmission assembly is in the second transmission state, the second driving wheel 230 is meshed with the transmission wheel set 400.

[0038] In this embodiment, when the transmission assembly is in the first transmission state, when the knob 240 is turned, the knob 240 drives the first driving wheel 220 and the second driving wheel 230 to rotate through the driving shaft 210 at the same time. Since the first driving wheel 220 is meshed with the driven wheel set 300, the first driving wheel 220 directly drives the driven wheel set 300 to rotate in the opposite direction, and the driven wheel set 300 drives the winding wheel 500 to rotate in the opposite direction. When the transmission assembly is in the second transmission state, when the knob 240 is turned, the knob 240 drives the first driving wheel 220 and the second driving wheel 230 to rotate through the driving shaft 210 at the same time. Since the second driving wheel 230 is meshed with the transmission wheel set 400, and the transmission wheel set 400 is meshed with the driven driving wheel, the first driving wheel 220 drives the driven wheel set 300 to rotate in the same direction, and the driven wheel set 300 drives the winding wheel 500 to rotate in the same direction.

[0039] In some embodiments, the driven wheel assembly 300 includes a driven shaft 100 and a driven wheel 310 sleeved on the driven shaft 100 , and the switch button 150 is connected to the driven shaft 100 , and the switch button 150 is used to drive the driven wheel 310 to move along the driven shaft 100 .

[0040] In this embodiment, when the switch button 150 is pressed, the switch button 150 drives the driven wheel 310 to move axially, so that the driven wheel 310 can switch from meshing with the first driving wheel 220 to meshing with the transmission wheel 420, so that the transmission assembly can switch from the first transmission state to the second transmission state.

[0041] 6 and 7 , the driven shaft 100 includes an inner shaft 120 and an outer shaft 130 sleeved outside the inner shaft 120, the winding wheel 500 and the driven wheel 310 are sequentially sleeved on the outer shaft 130 along the axial direction, and the winding wheel 500 and the driven wheel 310 rotate synchronously, one of the inner shaft 120 and the outer shaft 130 is fixedly connected to the winding wheel 500, and the other of the inner shaft 120 and the outer shaft 130 is used to drive the driven wheel 310 to move axially.

[0042] In one embodiment, in conjunction with FIG6 , the winding wheel 500 is fixedly connected to the outer shaft 130, and the inner shaft 120 is used to drive the driven wheel 310 to move along its axial direction. Switch buttons 150 are respectively provided at both ends of the inner shaft 120, and when the inner shaft 120 is pushed along the axial direction, the inner shaft 120 can drive the driven wheel 310 to move along the axial direction.

[0043] Specifically, the outer shaft 130 is provided with a clearance groove 131 along the axial direction of the outer shaft 130 in the length direction, the inner shaft 120 is provided with a matching groove 121, and a positioning column 311 is provided in the driven wheel 310, and the positioning column 311 passes through the clearance groove 131 and matches with the matching groove 121 along the axial direction of the inner shaft 120. Since the positioning column 311 matches with the matching groove 121 along the axial direction of the inner shaft 120, when the inner shaft 120 is pushed in the axial direction, the inner shaft 120 can drive the driven wheel 310 to move in the axial direction through the positioning column 311, wherein, since the length direction of the clearance groove 131 is the same as the axial direction of the outer shaft 130, the positioning column 311 can move in the axial direction in the clearance groove 131, so that the outer shaft 130 remains stationary.

[0044] The matching groove 121 includes a penetration groove section 1211 and a positioning groove section 1212 inclined with the penetration groove section 1211. One end of the penetration groove section 1211 extends to the outside of the inner shaft 120, and the other end is connected with the positioning groove section 1212. The positioning column 311 is used to extend from the penetration groove section 1211 to one end outside the inner shaft 120, and move into the positioning groove section 1212 through the penetration groove section 1211, so as to match with the positioning groove section 1212.

[0045] Specifically, the penetration groove section 1211 is perpendicular to the positioning groove section 1212 , that is, the matching groove 121 is an L-shaped structure.

[0046] 6 and 7 , the driven wheel assembly includes a fixing block 140 , at least one end of the outer shaft 130 cooperates with the fixing block 140 along the axial direction, and the inner shaft 120 cooperates with the fixing block 140 along the radial direction.

[0047] Specifically, the fixing block 140 has a first protrusion 141 extending in the axial direction and a second protrusion 142 extending in the radial direction, the inner shaft 120 has a strip groove 128 extending in the axial direction in the length direction, and the end of the outer shaft 130 has a clamping groove 138, and the first protrusion 141 extends into the clamping groove 138, so that the end of the outer shaft 130 and the fixing block 140 are matched in the axial direction. The second protrusion 142 can move along the strip groove 128, so that the inner shaft 120 and the fixing block 140 are matched in the radial direction. Therefore, when the driving wheel directly or indirectly drives the driven wheel 310 to rotate, the inner shaft 120 and the outer shaft 130 can rotate at the same time, so as to prevent the positioning column 311 from slipping out of the positioning groove section 1212.

[0048] In some other embodiments, in combination with FIG. 7 , the rotating inner shaft 120 is used to drive the driven wheel 310 to move along its axial direction.

[0049] Specifically, the outer shaft 130 is provided with a clearance groove 131 along the axial direction of the outer shaft 130 in the length direction, the inner shaft 120 is provided with a matching groove 121 inclined with the clearance groove 131, and a positioning column 311 is provided in the driven wheel 310, and the positioning column 311 passes through the clearance groove 131 and matches with the matching groove 121. The positioning column 311 passes through the clearance groove 131 and matches with the matching groove 121. When the inner shaft 120 is rotated, the positioning column 311 moves in the inclined matching groove 121. At the same time, due to the limitation of the clearance groove 131 on the positioning column 311, the positioning column 311 can only move along the length direction of the clearance groove 131, that is, the driven wheel 310 moves along the axial direction of the outer shaft 130.

[0050] The air-avoiding groove 131 is a long strip structure, the groove width of the air-avoiding groove 131 is matched with the outer diameter of the positioning column 311 , and the groove width of the matching groove 121 is matched with the outer diameter of the positioning column 311 .

[0051] Furthermore, the angle between the matching groove 121 and the avoiding groove 131 can be greater than 0 degrees and less than 90 degrees. Specifically, the matching groove 121 and the avoiding groove 131 are 45 degrees. The matching groove 121 is a spiral structure, and the matching groove 121 extends to the outside of one end of the inner shaft 120.

[0052] Specifically, the matching groove 121 is a spiral structure, which allows the matching groove 121 to extend outside one end of the inner shaft 120, making it easier for the driven wheel 310 to extend along the matching groove 121 to one end of the inner shaft 120 and be installed in the matching groove 121.

[0053] In some embodiments, two ends of the inner shaft 120 extend out of the outer shaft 130 , respectively, and two ends of the outer shaft 130 are respectively sandwiched between two ends of the inner shaft 120 .

[0054] Furthermore, a positioning pin 123 is provided outside at least one end of the inner shaft 120 extending to the outer shaft 130 . The positioning pin 123 passes through the inner shaft 120 along the radial direction of the inner shaft 120 , and both ends extend outside the inner shaft 120 . At least one end of the outer shaft 130 is used to abut against the positioning pin 123 .

[0055] In some embodiments, the transmission wheel assembly 400 includes a transmission shaft 410 and a transmission wheel 420 sleeved on the transmission shaft 410 . The driven shaft 100 , the transmission shaft 410 and the driving shaft 210 are arranged in parallel, and the transmission wheel 420 meshes with the second driving wheel 230 .

[0056] In this embodiment, the first driving wheel 220 and the second driving wheel 230 are arranged along the axial direction of the driving shaft 210, and the driven shaft 100, the transmission shaft 410 and the driving shaft 210 are arranged in parallel. When the driven wheel 310 moves along the driven shaft 100, it can switch from meshing with the first driving wheel 220 to meshing with the transmission wheel 420.

[0057] In some embodiments, referring to FIG. 4 , the first driving wheel 220 and the second driving wheel 230 have the same diameter, and the driven shaft 100 , the transmission shaft 410 , and the driving shaft 210 are not colinear along the axial projections of the driving wheels.

[0058] In this embodiment, in conjunction with FIG. 5 , the endoscope includes a handle, the handle has a housing 600, and the two ends of the driven shaft 100, the transmission shaft 410, and the active shaft 210 are respectively connected to two opposite side walls of the housing 600, wherein a knob 240 is provided at one end of the active shaft 210, and the active shaft 210 is rotatably connected to the housing 600, and a switching button 150 is provided at at least one end of the driven shaft 100, and the switching button 150 and the housing 600 are movably arranged along the axial direction of the driven shaft 100. The two ends of the transmission shaft 410 are respectively fixedly connected to the housing 600, and the rotating shaft is rotatably arranged on the transmission shaft 410.

[0059] The axial projections of the driven shaft 100, the transmission shaft 410 and the driving shaft 210 along the driving shaft 210 are not colinear, so that when the diameters of the first driving wheel 220 and the second driving wheel 230 are the same, and when the radial positions of the driving shaft 210 and the driven shaft 100 along the first driving wheel 220 remain unchanged, the driven wheel 310 can switch from meshing with the first driving wheel 220 to meshing with the transmission wheel 420.

[0060] In some other embodiments, the driven shaft 100 may also be arranged obliquely with respect to the driving shaft 210. In this case, the driven shaft 100, the transmission shaft 410 and the driving shaft 210 may be projected along the axial direction of the driving shaft 210 so as to be located on the same straight line.

[0061] In some embodiments, there are two transmission wheels 420 , and the two transmission wheels 420 rotate synchronously, wherein one transmission wheel 420 is used to mesh with the driven wheel 310 , and the other transmission wheel 420 meshes with the second driving wheel 230 .

[0062] Among them, the two transmission wheels 420 can be arranged at intervals or closely together. Since the first driving wheel 220 and the second driving wheel 230 have the same diameter, and the driven shaft 100, the transmission shaft 410 and the driving shaft 210 are not colinear along the axial projection of the driving shaft 210, when the transmission wheel 420 is engaged with the driven wheel 310, it is necessary to prevent the second driving wheel 230 from directly engaging with the driven wheel 310. Therefore, it is necessary to make the number of transmission wheels 420 two, and the two transmission wheels 420 rotate synchronously. When the transmission assembly is in the second state, one of the transmission wheels 420 is used to engage with the driven wheel 310, and the other transmission wheel 420 is engaged with the second driving wheel 230.

[0063] In other embodiments, the diameter of the first driving wheel may be larger than the diameter of the second driving wheel, and the number of the transmission wheel may be one, so that the driven wheel can be switched from the meshing state with the first driving wheel to the meshing state with the transmission wheel.

[0064] In some embodiments, the winding wheel 500 is disposed in a fixed sleeve outside the driven shaft 100, and the driven wheel 310 is matched with the driven shaft 100 in the radial direction.

[0065] Specifically, the outer shaft 130 is provided with a strip-shaped protrusion 132 along the axial direction in the length direction, and the driven wheel 310 is provided with a groove matched with the strip-shaped protrusion 132. That is, when the driven wheel 310 moves along the axial direction, the groove can move along the length direction of the strip-shaped protrusion 132, and when the driving wheel group 200 directly or indirectly drives the driven wheel 310 to rotate, the driven wheel 310 can drive the outer shaft 130 to rotate through the strip-shaped protrusion 132, and then the outer shaft 130 drives the winding wheel 500 to rotate.

[0066] In some other embodiments, the driven wheel set includes a driven shaft and a first driven wheel and a second driven wheel sequentially sleeved on the driven shaft, the driving wheel set includes a driving shaft and a driving wheel sleeved on the driving shaft, and the switch button is used to drive the driving wheel to move along the driving shaft. When the transmission assembly is in the first transmission state, the driving wheel meshes with the first driven wheel; when the transmission assembly is in the second transmission state, the driving wheel meshes with the transmission wheel set, and the transmission wheel set meshes with the second driven wheel.

[0067] In some embodiments, in conjunction with FIG. 5 and FIG. 6 , the handle includes a housing 600, and mounting grooves 610 are respectively provided on two opposite side walls of the housing 600. The driven wheel assembly includes a fixing block 140, and both ends of the outer shaft 130 are respectively arranged in the corresponding mounting grooves 610 through the fixing blocks 140, and the fixing blocks 140 can rotate in the mounting grooves 610. An embedding groove 620 is provided outside the housing 600, and the embedding groove 620 is connected to the mounting groove 610, and both are circular grooves, and the diameter of the mounting groove 610 is larger than the diameter of the embedding groove 620, so that the bottom of the embedding groove 620 can form a stop for the fixing block 140. The switch button 150 is located in the embedding groove 620, and the fixing block 140 can form a stop for the switch button 150.

[0068] 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.

[0069] 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. An endoscope, characterized in that: It comprises an insertion tube and an operating handle arranged at one end of the insertion tube, wherein 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; The reversing device comprises a reversing mechanism, a switching button and a winding wheel, the reversing mechanism has a first transmission state and a second transmission state, the reversing mechanism comprises a driving wheel group, a transmission wheel group and a driven wheel group, and the driven wheel group is used to drive the winding wheel to rotate in the same direction; When the reversing mechanism is in the first transmission state, the driving wheel group is meshed with the driven wheel group; pressing or turning the switching button is used to switch the reversing mechanism from the first transmission state to the second transmission state. When the reversing mechanism is in the second transmission state, the driving wheel group is meshed with the driven wheel group through the transmission wheel group.

2. The endoscope according to claim 1, characterized in that The driving wheel group includes a driving shaft, a first driving wheel and a second driving wheel which are sequentially sleeved on the driving shaft, and at least one end of the driving shaft is provided with a knob; When the reversing mechanism is in the first transmission state, the first driving wheel is meshed with the driven wheel set; when the reversing mechanism is in the second transmission state, the second driving wheel is meshed with the transmission wheel set.

3. The endoscope according to claim 2, characterized in that The driven wheel assembly includes a driven shaft and a driven wheel sleeved on the driven shaft. The switch button is connected to the driven shaft. The switch button is used to drive the driven wheel to move along the axial direction of the driven shaft.

4. The endoscope according to claim 3, characterized in that The transmission wheel group includes a transmission shaft and a transmission wheel sleeved on the transmission shaft. The driven shaft, the transmission shaft and the driving shaft are arranged in parallel, and the transmission wheel is meshed with the second driving wheel.

5. The endoscope according to claim 4, characterized in that The first driving wheel and the second driving wheel have the same diameter, and the driven shaft, the transmission shaft and the driving shaft are not collinear in the axial projection along the driving wheel.

6. The endoscope according to claim 5, characterized in that There are two transmission wheels, which rotate synchronously, one of which is used to mesh with the driven wheel, and the other is used to mesh with the second driving wheel.

7. The endoscope according to claim 4, characterized in that: The diameter of the first driving wheel is greater than the diameter of the second driving wheel, and the number of the transmission wheel is one.

8. The endoscope according to claim 3, characterized in that: The winding wheel is fixedly sleeved outside the driven shaft, and the driven wheel is matched with the driven shaft in radial direction.

9. The endoscope according to claim 8, characterized in that The driven shaft includes an inner shaft and an outer shaft sleeved outside the inner shaft, the winding wheel and the driven wheel are sleeved on the outer shaft in sequence along the axial direction, and the winding wheel and the driven wheel rotate synchronously, the winding wheel is fixedly connected to the outer shaft, and the inner shaft is used to drive the driven wheel to move along its axial direction.

10. The endoscope according to claim 1, characterized in that The driven wheel group includes a driven shaft and a first driven wheel and a second driven wheel sequentially sleeved on the driven shaft, the driving wheel group includes a driving shaft and a driving wheel sleeved on the driving shaft, and the switching button is used to drive the driving wheel to move along the axial direction of the driving shaft; When the reversing mechanism is in the first transmission state, the driving wheel is meshed with the first driven wheel; when the reversing mechanism is in the second transmission state, the driving wheel is meshed with the second driven wheel through the transmission wheel set.

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