Endoscope and reversing device of operating handle thereof

Abstract

The utility model relates to an endoscope and a reversing device of an operating handle of the endoscope. The reversing device comprises a driving wheel set, a transmission wheel set, a driven wheel, a winding wheel and a transmission mechanism, the transmission mechanism comprises an inner shaft and an outer shaft arranged outside the inner shaft in a sleeving mode, the winding wheel and the driven wheel are sequentially arranged on the outer shaft in a sleeving mode in the axial direction and rotate synchronously, one of the inner shaft and the outer shaft is fixedly connected with the winding wheel, and the other one of the inner shaft and the outer shaft is fixedly connected with the transmission mechanism. The other one of the inner shaft and the outer shaft is used for driving the driven wheel to move in the axial direction. Therefore, the driven wheel can be switched from the direct meshing state with the driving wheel set to the meshing state with the transmission wheel set, or switched from the meshing state with the transmission wheel set to the direct meshing state with the driving wheel set. Meanwhile, the reel and the driven wheel rotate synchronously, so that when the driving wheel set is directly meshed with the driven wheel, the device can be suitable for operation of doctors with manual use habits. When the driving wheel set is meshed with the driven wheel through the transmission wheel set, the device can be suitable for operation of doctors with European hand use habits.

Description

Technical Field

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

[0002] An endoscope consists of an operating handle and an insertion tube connected to the handle. The insertion tube is a lighted tube that can be inserted through the mouth into the stomach or other natural orifices. The bending direction of the insertion tube's curved portion is controlled by a joystick on the operating handle. When the joystick is turned in a certain direction, the curved portion bends in a corresponding fixed direction.

[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. Utility Model Content

[0004] Based on this, it is necessary to provide a reversing device for an endoscope and its operating handle to address the problem that the endoscope in the related art cannot simultaneously meet the usage habits of doctors in two different places, Europe and America.

[0005] A reversing device for an operating handle, the reversing device comprising a driving wheel set, a transmission wheel set, a driven wheel, a winding wheel, and a transmission mechanism, the transmission mechanism being used to drive the driven wheel to move axially so that the driven wheel can selectively engage with the driving wheel set through the transmission wheel set or directly engage with the driving wheel set;

[0006] The transmission mechanism 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, one of the inner shaft and the outer shaft is fixedly connected to the winding wheel, and the other of the inner shaft and the outer shaft is used to drive the driven wheel to move axially.

[0007] In one embodiment, 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.

[0008] In one embodiment, at least one end of the inner shaft extends out of the outer shaft, and when the inner shaft is pushed axially, the inner shaft can drive the outer shaft to move axially.

[0009] In one embodiment, the outer shaft is provided with a clearance groove along the axial direction of the outer shaft, the inner shaft is provided with a matching groove, and a positioning column is provided in the driven wheel, and the positioning column passes through the clearance groove and matches with the matching groove along the axial direction of the inner shaft.

[0010] In one embodiment, the mating groove includes a penetration groove section and a positioning groove section inclined with respect to the penetration groove section, one end of the penetration groove section extends to the outside of the inner shaft, and the other end is connected with the positioning groove section, and the positioning column cooperates with the positioning groove section.

[0011] In one embodiment, the penetration slot section is perpendicular to the positioning slot section.

[0012] In one embodiment, the transmission mechanism includes a fixed block, at least one end portion of the outer shaft cooperates with the fixed block in the axial direction, and the inner shaft cooperates with the fixed block in the radial direction.

[0013] In one embodiment, the outer shaft is provided with a strip-shaped protrusion extending in the axial direction in the length direction, and the driven wheel is provided with a groove cooperating with the strip-shaped protrusion.

[0014] An endoscope comprises an insertion tube and an operating handle arranged at one end of the insertion tube, wherein a reversing device of the operating handle 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.

[0015] In one embodiment, the operating handle has a shell, both ends of the outer shaft are rotatably connected to the shell, and the shell is used to limit the axial movement of the outer shaft.

[0016] In the aforementioned reversing device for the endoscope and its operating handle, the other of the inner and outer shafts is configured to drive the driven wheel to axially move, thereby enabling the driven wheel to switch from direct engagement with the driving wheel assembly to engagement with the transmission wheel assembly, or vice versa. Since the winding wheel and the driven wheel rotate synchronously, when the driving wheel assembly directly engages the driven wheel, rotating the driving wheel assembly drives the driven wheel in the opposite direction, and the driven wheel drives the winding wheel in the opposite direction. This arrangement is suitable for operation by physicians with American-style hand movements. When the driving wheel assembly engages the driven wheel through the transmission wheel assembly, the driving wheel assembly rotates in opposite directions, and the transmission wheel assembly rotates in opposite directions to the driven wheel, i.e., the driving wheel assembly and the driven wheel rotate in the same direction. When the driving wheel set is rotated, the driving wheel set is used to drive the driven wheel to rotate in the same direction, and the driven wheel drives the winding wheel to rotate in the same direction as the driving wheel set. At this time, it is suitable for doctors with European hand usage habits to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural schematic diagram of an embodiment in which the reversing device is arranged in the housing when the driven wheel is directly engaged with the driving wheel set.

[0018] Figure 2 Schematic diagram of the structure of a reversing device disposed in a housing when a driven wheel is engaged with a driving wheel set through a transmission wheel set in one embodiment.

[0019] Figure 3 for Figure 2 Schematic diagram of the structure of the reversing device.

[0020] Figure 4 for Figure 2 Schematic diagram of the cross-sectional structure of the middle reversing device arranged in the housing.

[0021] Figure 5 Schematic diagram of the exploded structure of the transmission mechanism in one embodiment.

[0022] Figure 6 Schematic diagram of the structure of a fixed block in one embodiment.

[0023] : Figure numerals: 100, transmission mechanism; 120, inner shaft; 121, matching groove; 1211, insertion groove section; 1212, positioning groove section; 128, strip groove; 130, outer shaft; 131, air-avoiding groove; 132, strip-shaped protrusion; 138, card 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; 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, embedded groove. DETAILED DESCRIPTION

[0024] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0025] In the description of this 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 this 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 this application.

[0026] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0027] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0028] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this 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. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0029] 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 an intermediate 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 an intermediate element. 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 embodiment.

[0030] See Figures 1-3 The present application provides a reversing device for an operating handle, which includes a driving wheel assembly 200, a transmission wheel assembly 400, a driven wheel 310, a winding wheel 500, and a transmission mechanism 100. The transmission mechanism 100 is used to drive the driven wheel 310 to move axially so that the driven wheel 310 can selectively engage with the driving wheel assembly 200 through the transmission wheel assembly 400 (see FIG. Figure 2 ) or directly engage with the driving wheel set 200 (see Figure 1 The transmission mechanism 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. 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.

[0031] In this embodiment, the other of the inner shaft 120 and the outer shaft 130 is used to drive the driven wheel 310 to move axially, thereby enabling the driven wheel 310 to switch from a direct meshing state with the driving wheel assembly 200 to a meshing state with the transmission wheel assembly 400, or vice versa. Since the winding wheel 500 and the driven wheel 310 rotate synchronously, when the driving wheel assembly 200 directly meshes with the driven wheel 310, rotating the driving wheel assembly 200 drives the driven wheel 310 to rotate in the opposite direction, and the driven wheel 310 drives the winding wheel 500 to rotate in the opposite direction. This is suitable for doctors with American hand usage habits. When the driving wheel assembly 200 is meshed with the driven wheel 310 through the transmission wheel assembly 400, the driving wheel assembly 200 and the transmission wheel assembly 400 rotate in opposite directions, and the transmission wheel assembly 400 and the driven wheel 310 rotate in opposite directions, that is, the driving wheel assembly 200 and the driven wheel 310 rotate in the same direction. When the driving wheel assembly 200 is rotated, the driving wheel assembly 200 drives the driven wheel 310 to rotate in the same direction, and the driven wheel 310 drives the winding wheel 500 to rotate in the same direction as the driving wheel assembly 200. In this case, it is suitable for doctors with European hand usage habits.

[0032] In some embodiments, the reel 500 is fixedly connected to the outer shaft 130, and the inner shaft 120 is used to drive the driven wheel 310 to move axially. The inner shaft 120 may be rotated to drive the driven wheel 310 to move axially, or at least one end of the inner shaft 120 may extend outside the outer shaft 130. When the inner shaft 120 is pushed axially, the inner shaft 120 can drive the driven wheel 310 to move axially.

[0033] In some other embodiments, the winding wheel may be fixedly connected to the inner shaft, and the outer shaft may be used to drive the driven wheel to move along its axial direction.

[0034] Specifically, the outer shaft is provided with an escape groove, the inner shaft is fixedly connected to a winding wheel sleeved on the outer shaft via a connector that passes through the escape groove, and the driven wheel is fixedly connected to the outer shaft. The outer shaft is movable axially relative to the inner shaft, and when the outer shaft moves axially, it drives the driven wheel to move axially. When the driving wheel directly or indirectly drives the driven wheel to rotate, the driven wheel in turn drives the winding wheel to rotate via the outer shaft and the connector.

[0035] Combine Figure 5 In some embodiments, the outer shaft 130 is provided with an air avoidance 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. The positioning column 311 passes through the air avoidance groove 131 and matches with the matching groove 121 along the axial direction of the inner shaft 120.

[0036] Since the positioning column 311 and the matching groove 121 are axially matched with 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 column 311. Since the length direction of the air avoidance groove 131 is the same as the axial direction of the outer shaft 130, the positioning column 311 can move axially in the air avoidance groove 131, thereby keeping the outer shaft 130 stationary.

[0037] Furthermore, the mating groove 121 includes a penetration groove section 1211 and a positioning groove section 1212 that is inclined relative to 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 to the positioning groove section 1212. The positioning post 311 is configured to move along the end of the penetration groove section 1211 that extends to the outside of the inner shaft 120 through the penetration groove section 1211 into the positioning groove section 1212, thereby mating with the positioning groove section 1212.

[0038] Specifically, the penetration groove section 1211 is perpendicular to the penetration groove section 1211 .

[0039] See Figure 5 and Figure 6In some embodiments, the transmission mechanism 100 includes a fixed block 140 , at least one end of the outer shaft 130 cooperates with the fixed block 140 along the axial direction, and the inner shaft 120 cooperates with the fixed block 140 along the radial direction.

[0040] 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 axially engaging the end of the outer shaft 130 with the fixing block 140. The second protrusion 142 can move along the strip groove 128, thereby radially engaging the inner shaft 120 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 post 311 from falling out of the positioning groove section 1212.

[0041] In some embodiments, the outer shaft 130 is provided with a strip-shaped protrusion 132 extending along the axial direction along its length, and the driven wheel 310 is provided with a groove that cooperates 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. 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 reel 500 to rotate.

[0042] An embodiment of the present application also provides an endoscope, including an insertion tube and an operating handle arranged at one end of the insertion tube, wherein a reversing device of the operating handle is provided 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.

[0043] Specifically, the driving wheel assembly 200 includes a driving shaft 210, a first driving wheel 220, and a second driving wheel 230, which are sequentially mounted on the driving shaft 210 along the axial direction of the driving shaft 210. A knob 240 is provided at at least one end of the driving shaft 210. When the knob 240 is turned, the driving shaft 210 can simultaneously drive the first driving wheel 220 and the second driving wheel 230 to rotate. The transmission wheel assembly 400 includes a transmission shaft 410 and a transmission wheel 420 mounted on the transmission shaft 410. The inner shaft 120, the transmission shaft 410, and the driving shaft 210 are arranged parallel to each other, and the transmission wheel 420 is meshed with the second driving wheel 230.

[0044] For example, the initial state of the transmission mechanism 100 is adapted for American hand usage. In this state, the driven wheel 310 is directly engaged with the first driving wheel 220. When the knob 240 is turned, the first driving wheel 220 drives the driven wheel 310 to rotate in the opposite direction. The driven wheel 310 then drives the winding wheel 500 to rotate in the opposite direction to the first driving wheel 220. The winding wheel 500 tightens the drawstring in the first direction, causing the curved portion of the endoscope to bend in the first direction. To switch to a state adapted for European hand usage, the inner shaft 120 is rotated, causing it to rotate within the outer shaft 130. The inner shaft 120 drives the driven wheel 310 to move along its axial direction, causing the driven wheel 310 to engage with the second driving wheel 230 via the transmission wheel 420. When the knob 240 is rotated in the same direction, the second driving wheel 230 drives the driven wheel 310 to rotate in the opposite direction through the transmission wheel 420. The driven wheel 310 drives the winding wheel 500 to rotate in the same direction as the second driving wheel 230. The winding wheel 500 tightens the pull rope in the second direction so that the curved portion on the endoscope bends in the second direction.

[0045] Combine Figure 4 In some embodiments, the operating handle has a shell 600, both ends of the outer shaft 130 are rotatably connected to the shell 600, and the shell 600 is used to limit the axial movement of the outer shaft 130.

[0046] Specifically, two opposite side walls of the housing 600 are provided with mounting grooves 610 . Both ends of the outer shaft 130 are respectively disposed in corresponding mounting grooves 610 through fixing blocks 140 , and the fixing blocks 140 are rotatable in the mounting grooves 610 .

[0047] Furthermore, switch buttons 150 are respectively provided at both ends of the inner shaft 120 , and at least one switch button 150 extends out of the housing 600 .

[0048] The housing 600 has an inserting groove 620 that communicates with the mounting groove 610. Both the mounting groove 610 and the inserting groove 620 are circular grooves, with the diameter of the mounting groove 610 being larger than that of the inserting groove 620. This allows the bottom of the inserting groove 620 to form a stop for the fixing block 140. Furthermore, the fixing block 140 limits the maximum insertion position of the switch button 150. Specifically, when the first switch button 150 is pressed, the second switch button 150 moves within the inserting groove 620 toward the side extending outside the housing 600. When the first switch button 150 abuts the corresponding fixing block 140, the second switch button 150 protrudes outside the housing 600.

[0049] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned 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.

[0050] The above-described embodiments merely represent several implementation methods of the present application. 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 a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A reversing device for an operating handle, characterized in that: The reversing device includes a driving wheel group, a transmission wheel group, a driven wheel, a winding wheel and a transmission mechanism, wherein the transmission mechanism is used to drive the driven wheel to move axially, so that the driven wheel can selectively engage with the driving wheel group through the transmission wheel group or directly engage with the driving wheel group; The transmission mechanism 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, one of the inner shaft and the outer shaft is fixedly connected to the winding wheel, and the other of the inner shaft and the outer shaft is used to drive the driven wheel to move axially.

2. The reversing device of the operating handle according to claim 1, characterized in that: 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.

3. The reversing device of the operating handle according to claim 2, characterized in that: At least one end of the inner shaft extends out of the outer shaft, and when the inner shaft is pushed axially, the inner shaft can drive the outer shaft to move axially.

4. The reversing device of the operating handle according to claim 2, characterized in that: The outer shaft is provided with an air avoidance groove along the axial direction of the outer shaft, the inner shaft is provided with a matching groove, and a positioning column is provided in the driven wheel. The positioning column passes through the air avoidance groove and matches with the matching groove along the axial direction of the inner shaft.

5. The reversing device of the operating handle according to claim 4, characterized in that: The matching groove includes a penetration groove section and a positioning groove section inclined with the penetration groove section. One end of the penetration groove section extends to the outside of the inner shaft, and the other end is connected with the positioning groove section. The positioning column matches with the positioning groove section.

6. The reversing device of the operating handle according to claim 5, characterized in that: The penetration groove section is perpendicular to the positioning groove section.

7. The reversing device of the operating handle according to claim 1, characterized in that: The transmission mechanism includes a fixed block, at least one end portion of the outer shaft is axially matched with the fixed block, and the inner shaft is radially matched with the fixed block.

8. The reversing device of the operating handle according to claim 1, characterized in that: The outer shaft is provided with a strip-shaped protrusion extending in the axial direction in its length direction, and the driven wheel is provided with a groove matched with the strip-shaped protrusion.

9. An endoscope, characterized in that: It comprises an insertion tube and an operating handle arranged at one end of the insertion tube, wherein the operating handle is provided with a reversing device of the operating handle according to any one of claims 1 to 8, a pull rope is wound around the winding wheel, and the pull rope is connected to the curved portion on the insertion tube.

10. The endoscope according to claim 9, characterized in that The operating handle has a shell, both ends of the outer shaft are rotatably connected to the shell, and the shell is used to limit the outer shaft from moving in the axial direction.

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