Endoscope

Abstract

An endoscope, comprising a direction switching device. The direction switching device comprises 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 comprises a driving wheel set (200), a transmission wheel set (400), and a driven wheel set (300), and the driven wheel set (300) is used for driving the winding wheel (500) to rotate in a same direction. When the transmission assembly is in the first transmission state, the driving wheel set (200) is engaged with the driven wheel set (300), and in this case, the endoscope is suitable for operation by physicians accustomed to American-hand operation. By pressing the switching button (150), the transmission assembly is switched from the first transmission state to the second transmission state. When the transmission assembly is in the second transmission state, the driving wheel set (200) is engaged with the transmission wheel set (400), and the transmission wheel set (400) is engaged with the driven wheel set (300), and in this case, the endoscope is suitable for operation by physicians accustomed to European-hand operation.

Description

Endoscopy Technical Field

[0001] This application relates to the field of medical device technology, and in particular to endoscopes. Background Technology

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

[0003] However, since the bending direction of the curved part is fixed when operating the control lever, it cannot simultaneously meet the usage habits of doctors in two different regions, Europe and America. Summary of the Invention

[0004] Therefore, it is necessary to provide an endoscope that addresses the problem that existing endoscopes cannot simultaneously meet the usage habits of doctors in Europe and America.

[0005] An endoscope includes an insertion tube and an operating handle disposed at one end of the insertion tube. The operating handle is provided with a reversing device. A pull rope is wound on a winding reel and the pull rope is connected to a curved portion on the insertion tube.

[0006] The reversing device includes 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 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.

[0007] In the first transmission state, the driving wheel set and the driven wheel set of the reversing mechanism are engaged. Pressing or rotating the switching button is used to switch the reversing mechanism from the first transmission state to the second transmission state. In the second transmission state, the driving wheel set and the driven wheel set are engaged through the transmission wheel set.

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

[0009] In the first transmission state, the first driving wheel of the reversing mechanism meshes with the driven wheel set; in the second transmission state, the second driving wheel meshes 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, and the switching button is connected to the driven shaft, the switching button being used to drive the driven wheel to move along the axial direction of 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 meshes 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 along the axial projection of the driving wheel.

[0013] In one embodiment, there are two drive wheels that rotate synchronously, with one drive wheel meshing with the driven wheel and the other drive wheel meshing with the second driving wheel.

[0014] In one embodiment, the diameter of the first drive wheel is larger than the diameter of the second drive wheel, and the number of drive wheels is one.

[0015] In one embodiment, the winding wheel is fixedly sleeved outside the driven shaft, and the driven wheel and the driven shaft are radially engaged.

[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] In the first transmission state, the driving wheel of the reversing mechanism meshes with the first driven wheel; in the second transmission state, the driving wheel meshes with the second driven wheel through the transmission wheel set.

[0018] The aforementioned endoscope has a reversing mechanism with a first transmission state and a second transmission state. In the first transmission state, the driving wheel assembly and the driven wheel assembly are engaged. Rotating the driving wheel assembly drives the driven wheel assembly to rotate in the opposite direction, and the driven wheel assembly drives the winding wheel to rotate in the opposite direction. This is suitable for doctors accustomed to using the American hand technique. Pressing the switch button switches the reversing mechanism from the first transmission state to the second transmission state. In this state, the driving wheel assembly and the driving wheel assembly are engaged, and the driving wheel assembly and the driven wheel assembly are engaged. The driving wheel assembly and the driving wheel assembly rotate in opposite directions, and the driving wheel assembly and the driven wheel assembly rotate in opposite directions. In other words, the driving wheel assembly and the driven wheel assembly rotate in the same direction. Rotating the driving wheel assembly drives the driven wheel to rotate in the same direction, and the driven wheel assembly drives the winding wheel to rotate in the same direction. This is suitable for doctors accustomed to using the European hand technique. In short, switching between American and European hand techniques can be achieved simply by pressing the switch button; the structure is simple and easy to operate. Attached Figure Description

[0019] Figure 1 is a schematic diagram of the reversing device installed in the housing when the transmission assembly has a first transmission state in one embodiment.

[0020] Figure 2 is a schematic diagram of the reversing device installed in the housing when the transmission assembly has a second transmission state in one embodiment.

[0021] Figure 3 is a schematic diagram of the commutation device in Figure 2.

[0022] Figure 4 is a bottom view of the commutation device in Figure 2.

[0023] Figure 5 is a cross-sectional view of the commutation device in Figure 2 installed inside the housing.

[0024] Figure 6 is an exploded view of the driven wheel assembly in one embodiment.

[0025] Figure 7 is a schematic diagram of the structure of the fixing block in Figure 6.

[0026] Figure 8 is an exploded view of the driven wheel assembly in another embodiment.

[0027] Reference numerals: 100, driven shaft; 120, inner shaft; 121, mating groove; 1211, insertion groove section; 1212, positioning groove section; 123, positioning pin; 128, strip groove; 130, outer shaft; 131, clearance groove; 132, strip protrusion; 138, slot; 140, fixing block; 141, first protrusion; 142, second protrusion; 150, switching button; 200, driving wheel assembly; 210, driving shaft; 220, first driving wheel; 230, second driving wheel; 240, knob; 300, driven wheel assembly; 310, driven wheel; 311, positioning pin; 400, transmission wheel assembly; 410, transmission shaft; 420, transmission wheel; 500, winding wheel; 600, housing; 610, mounting groove; 620, embedding groove. Detailed Implementation

[0028] 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.

[0029] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0030] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0031] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0032] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0033] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0034] An embodiment of this application also provides an endoscope, including an insertion tube and an operating handle disposed in one of the insertion tubes. A reversing device is disposed inside the operating handle, and a pull rope is wound on a winding reel 500. The pull rope is connected to a curved portion on the insertion tube.

[0035] The reversing device includes a transmission assembly, a switching button 150, and a winding reel 500. The transmission assembly has a first transmission state and a second transmission state. The transmission assembly includes a driving wheel set 200, a transmission wheel set 400, and a driven wheel set 300. The driven wheel set 300 drives the winding reel 500 to rotate in the same direction. In the first transmission state, the driving wheel set 200 and the driven wheel set 300 are engaged. Pressing or rotating the switching button 150 switches the transmission assembly from the first transmission state to the second transmission state. In the second transmission state, the driving wheel set 200 is engaged with the driven wheel set 300 through the transmission wheel set 400.

[0036] In this embodiment, the transmission assembly has a first transmission state and a second transmission state. Referring to Figure 1, in the first transmission state, the driving wheel assembly 200 and the driven wheel assembly 300 are engaged. When the driving wheel assembly 200 is rotated, it drives the driven wheel assembly 300 to rotate in the opposite direction, and the driven wheel assembly 300 drives the winding wheel 500 to rotate in the opposite direction. This is suitable for doctors who are accustomed to using American hands. After pressing the switch button 150, the transmission assembly switches from the first transmission state to the second transmission state. At this time, referring to Figure 2, the driving wheel assembly 200 is engaged with the transmission wheel assembly 400, and the transmission wheel assembly 400 is engaged with the driven wheel assembly 300. The driving wheel assembly 200 rotates in the opposite direction to the transmission wheel assembly 400, and the transmission wheel assembly 400 rotates in the opposite direction to the driven wheel assembly 300. In other words, the driving wheel assembly 200 and the driven wheel assembly 300 rotate in the same direction. When the driving wheel assembly 200 is rotated, it drives the driven wheel 310 to rotate in the same direction, and the driven wheel assembly 300 drives the winding wheel 500 to rotate in the same direction. This configuration is suitable for doctors using the European hand technique. Switching between American and European hand techniques can be achieved simply by pressing the switching button 150. The structure is simple and easy to operate.

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

[0038] In this embodiment, in the first transmission state, when the knob 240 is rotated, the knob 240 simultaneously drives the first driving wheel 220 and the second driving wheel 230 to rotate via the drive shaft 210. Since the first driving wheel 220 meshes with the driven wheel assembly 300, that is, the first driving wheel 220 directly drives the driven wheel assembly 300 to rotate in the opposite direction, and the driven wheel assembly 300 drives the winding wheel 500 to rotate in the opposite direction. In the second transmission state, when the knob 240 is rotated, the knob 240 simultaneously drives the first driving wheel 220 and the second driving wheel 230 to rotate via the drive shaft 210. Since the second driving wheel 230 meshes with the transmission wheel assembly 400, and the transmission wheel assembly 400 meshes with the driven and driving wheels, that is, the first driving wheel 220 drives the driven wheel assembly 300 to rotate in the same direction, and the driven wheel assembly 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. A switching button 150 is connected to the driven shaft 100 and is used to drive the driven wheel 310 to move along the driven shaft 100.

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

[0041] Referring to Figures 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 along the axial direction.

[0042] In one embodiment, referring to Figure 6, 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. A switching button 150 is provided at each end of the inner shaft 120. When the inner shaft 120 is pushed axially, the inner shaft 120 can drive the driven wheel 310 to move axially.

[0043] Specifically, the outer shaft 130 has a clearance groove 131 extending along the axial direction of the outer shaft 130, and the inner shaft 120 has a mating groove 121. A positioning pin 311 is disposed inside the driven wheel 310, passing through the clearance groove 131 and mating with the mating groove 121 along the axial direction of the inner shaft 120. Since the positioning pin 311 and the mating groove 121 are mated along the axial direction of the inner shaft 120, when the inner shaft 120 is pushed axially, the inner shaft 120 can drive the driven wheel 310 to move axially through the positioning pin 311. Since the length direction of the clearance groove 131 is the same as the axial direction of the outer shaft 130, the positioning pin 311 can move axially within the clearance groove 131, thereby keeping the outer shaft 130 stationary.

[0044] The mating groove 121 includes an insertion groove section 1211 and a positioning groove section 1212 inclined to the insertion groove section 1211. One end of the insertion groove section 1211 extends to the outside of the inner shaft 120, and the other end communicates with the positioning groove section 1212. The positioning post 311 mates with the positioning groove section 1212. The positioning post 311 is used to move from the end of the insertion groove section 1211 extending to the outside of the inner shaft 120 through the insertion groove section 1211 into the positioning groove section 1212, thereby mates with the positioning groove section 1212.

[0045] Specifically, the insertion groove 1211 is perpendicular to the positioning groove 1212, that is, the mating groove 121 has an L-shaped structure.

[0046] Referring to Figures 6 and 7, the driven wheel assembly includes a fixed block 140, at least one end of the outer shaft 130 is axially engaged with the fixed block 140, and the inner shaft 120 is radially engaged with the fixed block 140.

[0047] Specifically, the fixing block 140 has a first protrusion 141 extending axially and a second protrusion 142 extending radially. The inner shaft 120 has a strip groove 128 extending axially along its length, and the end of the outer shaft 130 has a retaining groove 138. The first protrusion 141 extends into the retaining groove 138, thereby allowing the end of the outer shaft 130 to engage axially with the fixing block 140. The second protrusion 142 can move along the strip groove 128, thereby allowing the inner shaft 120 to engage radially with the fixing block 140. 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 simultaneously, thereby preventing the positioning pin 311 from dislodging from the positioning groove section 1212.

[0048] In some other embodiments, referring to FIG7, the inner shaft 120 is rotated to drive the driven wheel 310 to move along its axial direction.

[0049] Specifically, the outer shaft 130 has a clearance groove 131 extending along the axial direction of the outer shaft 130, and the inner shaft 120 has a mating groove 121 inclined to the clearance groove 131. A positioning pin 311 is installed inside the driven wheel 310, passing through the clearance groove 131 and mating with the mating groove 121. When the inner shaft 120 is rotated, the positioning pin 311 moves within the inclined mating groove 121. Simultaneously, due to the limitation of the clearance groove 131 on the positioning pin 311, the positioning pin 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] Among them, the clearance groove 131 is a long strip structure, the width of the clearance groove 131 is adapted to the outer diameter of the positioning post 311, and the width of the mating groove 121 is adapted to the outer diameter of the positioning post 311.

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

[0052] Specifically, the mating groove 121 has a spiral structure. The spiral structure allows the mating groove 121 to extend to one end of the inner shaft 120, which facilitates the installation of the driven wheel 310 into the mating groove 121 along the mating groove 121 extending to one end of the inner shaft 120.

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

[0054] Furthermore, a locating pin 123 is provided at least one end of the inner shaft 120 extending out of the outer shaft 130. The locating pin 123 passes through the inner shaft 120 radially and extends out of the inner shaft 120 at both ends. At least one end of the outer shaft 130 is used to abut against the locating 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 FIG4, 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 collinear along the axial projection of the driving wheel.

[0058] In this embodiment, referring to Figure 5, the endoscope includes a handle with a housing 600. The driven shaft 100, drive shaft 410, and drive shaft 210 are connected at both ends to two opposite sidewalls of the housing 600. A knob 240 is provided at one end of the drive shaft 210, which is rotatably connected to the housing 600. At least one end of the driven shaft 100 is provided with a switching button 150, which is movably mounted to the housing 600 along the axial direction of the driven shaft 100. Both ends of the drive shaft 410 are fixedly connected to the housing 600, and a rotating shaft is rotatably mounted on the drive shaft 410.

[0059] The driven shaft 100, the transmission shaft 410, and the drive shaft 210 are not collinear in their axial projection along the drive shaft 210. This allows the driven shaft 310 to switch from meshing with the first drive shaft 220 to meshing with the transmission shaft 420, provided that the first drive wheel 220 and the second drive wheel 230 have the same diameter and the radial positions of the drive shaft 210 and the driven shaft 100 along the first drive wheel 220 remain unchanged.

[0060] In some other embodiments, the driven shaft 100 may also be inclined to the drive shaft 210. In this case, the driven shaft 100, the drive shaft 410, and the drive shaft 210 can be projected onto the same straight line along the axial direction of the drive shaft 210.

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

[0062] The two drive wheels 420 can be arranged at intervals or close together. Since the first drive wheel 220 and the second drive wheel 230 have the same diameter, and the driven shaft 100, the drive shaft 410 and the drive shaft 210 are not collinear along the axial projection of the drive shaft 210, when the drive wheel 420 meshes with the driven wheel 310, it is necessary to prevent the second drive wheel 230 from meshing directly with the driven wheel 310. Therefore, it is necessary to have two drive wheels 420, and the two drive wheels 420 rotate synchronously. When the transmission assembly is in the second state, one drive wheel 420 is used to mesh with the driven wheel 310, and the other drive wheel 420 meshes with the second drive 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 transmission wheels may be one. This also allows the driven wheel to switch from a meshing state with the first driving wheel to a meshing state with the transmission wheel.

[0064] In some embodiments, the winding wheel 500 is fixedly sleeved outside the driven shaft 100, and the driven wheel 310 is radially engaged with the driven shaft 100.

[0065] Specifically, the outer shaft 130 is provided with a strip-shaped protrusion 132 extending along the axial direction, and the driven wheel 310 has a groove that mates with the strip-shaped protrusion 132. That is, when the driven wheel 310 moves axially, the groove can move along the length direction of the strip-shaped protrusion 132. At the same time, when the driving wheel assembly 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, thereby causing the outer shaft 130 to drive the winding wheel 500 to rotate.

[0066] In some other embodiments, 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. A switch button is used to drive the driving wheel to move along the driving shaft. In the first transmission state, the driving wheel meshes with the first driven wheel; in the second transmission state, the driving wheel meshes with the transmission wheel assembly, and the transmission wheel assembly meshes with the second driven wheel.

[0067] In some embodiments, referring to Figures 5 and 6, the handle includes a housing 600, with mounting grooves 610 respectively formed on two opposite sidewalls within the housing 600. The driven wheel assembly includes a fixing block 140, with both ends of the outer shaft 130 respectively positioned within the corresponding mounting grooves 610 via the fixing block 140, allowing the fixing block 140 to rotate within the mounting groove 610. An embedding groove 620 is formed on the outside of the housing 600, communicating with the mounting grooves 610, and both are circular grooves. The diameter of the mounting groove 610 is larger than the diameter of the embedding groove 620, allowing the bottom of the embedding groove 620 to stop the fixing block 140. A switching button 150 is located within the embedding groove 620, and the fixing block 140 can stop the switching button 150.

[0068] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0069] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An endoscope, characterized in that, It includes an insertion tube and an operating handle located at one end of the insertion tube. The operating handle is equipped with a reversing device, and a pull rope is wound on the winding reel. The pull rope is connected to a curved part on the insertion tube. The reversing device includes 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 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. In the first transmission state, the driving wheel set and the driven wheel set of the reversing mechanism are engaged. Pressing or rotating the switching button is used to switch the reversing mechanism from the first transmission state to the second transmission state. In the second transmission state, the driving wheel set and the driven wheel set are engaged through the transmission wheel set.

2. The endoscope according to claim 1, characterized in that, The drive wheel assembly includes a drive shaft, a first drive wheel and a second drive wheel sequentially mounted on the drive shaft, and a knob is provided at least one end of the drive shaft; In the first transmission state, the first driving wheel of the reversing mechanism meshes with the driven wheel set; in the second transmission state, the second driving wheel meshes 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 switching button is connected to the driven shaft and 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 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. The transmission wheel meshes 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 along the axial projection of the driving wheel.

6. The endoscope according to claim 5, characterized in that, The number of transmission wheels is two, and the two transmission wheels rotate synchronously. One transmission wheel is used to mesh with the driven wheel, and the other transmission wheel 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 larger than the diameter of the second driving wheel, and the number of the transmission wheels is one.

8. The endoscope according to claim 3, characterized in that, The winding wheel is fixedly sleeved on the driven shaft, and the driven wheel and the driven shaft are radially engaged.

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 sequentially sleeved on the outer shaft 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 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. The switching button is used to drive the driving wheel to move along the axial direction of the driving shaft. In the first transmission state, the driving wheel of the reversing mechanism meshes with the first driven wheel; in the second transmission state, the driving wheel meshes with the second driven wheel through the transmission wheel set.

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