Transmission mechanism, reversing device of handle and endoscope

Abstract

The utility model relates to a transmission mechanism, a reversing device of a handle and an endoscope. The transmission mechanism comprises an inner shaft and an outer shaft arranged outside the inner shaft in a sleeving mode, the driven wheel and the winding wheel are used for being sequentially arranged on the outer shaft in a sleeving mode in the axial direction, the winding wheel is fixedly connected with the outer shaft, the inner shaft can rotate relative to the outer shaft, and when the inner shaft rotates, the winding wheel can rotate relative to the outer shaft. The inner shaft is used for driving the driven wheel to move in the axial direction of the inner shaft. The winding wheel is fixedly connected with the outer shaft, the inner shaft can rotate relative to the outer shaft, and when the inner shaft is rotated, the inner shaft is used for driving the driven wheel to move in the axial direction of the inner shaft, so that 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 the meshing state with the transmission wheel set is switched to the direct meshing state with the driving wheel set, so that the use habits of doctors in two different places such as European and America can be met at the same time.

Description

Technical Field

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

[0002] An endoscope consists of a handle and an insertion tube connected to it. The insertion tube is a lighted tube that can be inserted through the mouth, into the stomach, or through other natural orifices. The bending direction of the insertion tube's curved portion is controlled by a joystick on the 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 transmission mechanism, a handle reversing device and an endoscope to address the problem that the endoscope in the relevant technology cannot simultaneously meet the usage habits of doctors in two different places, Europe and America.

[0005] A reversing device of a handle operating portion, wherein the transmission mechanism is arranged in the reversing device, the reversing device comprises a driving wheel set, a driven wheel, a winding wheel and a transmission wheel set, 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 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 driven wheel and the winding wheel are respectively used to be sleeved on the outer shaft in sequence along the axial direction, and the winding wheel is fixedly connected to the outer shaft. The inner shaft can rotate relative to the outer shaft. When the inner shaft is rotated, the inner shaft is used to drive the driven wheel to move along its axial direction.

[0007] 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 inclined to the clearance groove, and a positioning column is provided in the driven wheel, and the positioning column passes through the clearance groove and cooperates with the matching groove.

[0008] In one embodiment, the matching groove and the air-avoiding groove are arranged at 45 degrees.

[0009] In one embodiment, the mating groove is a spiral structure, and the mating groove extends to the outside of one end of the inner shaft.

[0010] In one embodiment, two ends of the inner shaft extend out of the outer shaft respectively, and two ends of the outer shaft are respectively sandwiched between two ends of the inner shaft.

[0011] In one embodiment, a positioning pin is provided outside at least one end of the inner shaft extending to the outer shaft. The positioning pin passes through the inner shaft along the radial direction of the inner shaft, and both ends extend outside the inner shaft. At least one end of the outer shaft is used to abut against the positioning pin.

[0012] A reversing device for a handle, characterized in that the reversing device includes a driving wheel group, a driven wheel, a winding wheel and a transmission mechanism, the driven wheel and the winding wheel are respectively and sequentially sleeved on the outer shaft along the axial direction, and the driven wheel and the winding wheel rotate synchronously.

[0013] An endoscope is characterized by comprising an insertion tube and an operating handle arranged on the insertion tube, wherein a handle reversing device is provided 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.

[0014] In one embodiment, the handle includes a housing, and two opposite side walls of the housing are respectively provided with mounting grooves;

[0015] The transmission mechanism includes a fixing block, and both ends of the outer shaft are respectively arranged in the corresponding mounting grooves through the fixing blocks, and the fixing blocks can rotate in the mounting grooves.

[0016] In one embodiment, one end of the inner shaft has a rotating portion, an embedding groove is provided on the outside of the shell, the rotating portion is embedded in the embedding groove, and a non-circular slot is provided on one side of the shell where the rotating portion is exposed.

[0017] The transmission mechanism, the reversing device of the handle and the endoscope, the winding wheel is fixedly connected with the outer shaft, the inner shaft can rotate relative to the outer shaft, when the inner shaft is rotated, the inner shaft is used to drive the driven wheel to move along the axial direction, so that the driven wheel can be switched from the direct engagement state with the driving wheel group to the engagement state with the transmission wheel group, or from the engagement state with the transmission wheel group to the direct engagement state with the driving wheel group. At the same time, since the driven wheel and the winding wheel are sequentially sleeved on the outer shaft along the axial direction respectively, and the driven wheel and the winding wheel rotate synchronously. When the driving wheel group is directly engaged with the driven wheel, the driving wheel group is used to drive the driven wheel to rotate in the opposite direction, and the driven wheel drives the winding wheel to rotate in the opposite direction, at this time, it is suitable for the operation of the doctor with American hand using habit. When the driving wheel group is engaged with the driven wheel through the transmission wheel group. The driving wheel group and the transmission wheel group rotate in opposite directions, and the transmission wheel group and the driven wheel rotate in opposite directions, that is, the driving wheel group and the driven wheel rotate in the same 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 drives the winding wheel to rotate in the same direction, at this time, it is suitable for the operation of the doctor with European hand using habit. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The structure schematic view of the reversing device when the driven wheel is directly engaged with the driving wheel group in an embodiment is arranged in the shell.

[0019] Figure 2 The structure schematic view of the reversing device when the driven wheel is engaged with the driving wheel group through the transmission wheel group in an embodiment is arranged in the shell.

[0020] Figure 3 The structure schematic view of the reversing device in an embodiment. Figure 2 The structure schematic view of the reversing device.

[0021] Figure 4 The sectional structure schematic view of the reversing device arranged in the shell in an embodiment. Figure 2

[0022] The exploded structure schematic view of the transmission mechanism in an embodiment. Figure 5

[0023] ​Figure numerals: 100, transmission mechanism; 120, inner shaft; 121, matching groove; 123, positioning pin; 124, rotating part; 1241, slot; 130, outer shaft; 131, air avoidance groove; 132, strip-shaped protrusion; 140, fixing block; 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 Figure 1-Figure 3 The transmission mechanism 100 provided in one embodiment of the present application is used to be arranged in a reversing device. The reversing device includes a driving wheel group 200, a driven wheel 310, a winding wheel 500 and a transmission wheel group 400. 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 group 200 through the transmission wheel group 400 (see 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 driven wheel 310 and the winding wheel 500 are respectively used to be sequentially sleeved on the outer shaft 130 along the axial direction. The winding wheel 500 is fixedly connected to the outer shaft 130. The inner shaft 120 can rotate relative to the outer shaft 130. When the inner shaft 120 is rotated, the inner shaft 120 is used to drive the driven wheel 310 to move along its axial direction.

[0031] In this embodiment, the winding wheel 500 is fixedly connected to the outer shaft 130, while the inner shaft 120 is rotatable relative to the outer shaft 130. Rotating the inner shaft 120 drives the driven wheel 310 axially, thereby enabling the driven wheel 310 to switch from direct engagement with the driving wheel assembly 200 to engagement with the transmission wheel assembly 400, or vice versa. Furthermore, because the driven wheel 310 and the winding wheel 500 are respectively and sequentially sleeved axially on the outer shaft 130, they rotate synchronously. When the driving wheel assembly 200 directly engages the driven wheel 310, rotating the driving wheel assembly 200 drives the driven wheel 310 to rotate in the opposite direction, which in turn drives the winding wheel 500 in the opposite direction. This configuration is suitable for use by physicians with American hand styling habits. When the driving wheel set 200 is meshed with the driven wheel 310 through the transmission wheel set 400, the driving wheel set 200 and the transmission wheel set 400 rotate in opposite directions, and the transmission wheel set 400 and the driven wheel 310 rotate in opposite directions, that is, the driving wheel set 200 and the driven wheel 310 rotate in the same direction. 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 310 drives the winding wheel 500 to rotate in the same direction. At this time, it is suitable for doctors with European hand usage habits to operate.

[0032] 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.

[0033] For example, the initial state of the transmission mechanism 100, adapted for American hand usage, is as follows: 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, which in turn drives the winding wheel 500 to rotate in the opposite direction of 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.

[0034] 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 an inclined matching groove 121, and a positioning column 311 is provided in the driven wheel 310, and the positioning column 311 passes through the air avoidance groove 131 and matches with the matching groove 121.

[0035] In this embodiment, the positioning column 311 passes through the air avoidance groove 131 and cooperates 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 air avoidance groove 131 on the positioning column 311, the positioning column 311 can only move along the length direction of the air avoidance groove 131, that is, the driven wheel 310 moves along the axial direction of the outer shaft 130.

[0036] It should be noted that since the pull rope wound around the winding wheel 500 is connected to the curved part of the insertion tube, the pull rope has a resistance to the winding wheel 500 that prevents it from rotating. Therefore, when the inner shaft 120 is rotated, the winding wheel 500 does not rotate, that is, the driven wheel 310 can be moved axially along the outer shaft 130 through the limiting effect of the air avoidance groove 131.

[0037] Furthermore, the air-avoiding groove 131 is a long strip structure, the groove width of the air-avoiding groove 131 is adapted to the outer diameter of the positioning column 311 , and the groove width of the matching groove 121 is adapted to the outer diameter of the positioning column 311 .

[0038] 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 at 45 degrees.

[0039] In some embodiments, the mating groove 121 is a spiral structure, and the mating groove 121 extends to the outside of one end of the inner shaft 120 .

[0040] In this embodiment, the mating groove 121 is a spiral structure, and the spiral structure allows the mating groove 121 to extend to the outside of one end of the inner shaft 120, making it convenient for the driven wheel 310 to extend along the mating groove 121 to one end of the inner shaft 120 and be installed in the mating groove 121.

[0041] Combine Figure 3 In some embodiments, the two ends of the inner shaft 120 extend out of the outer shaft 130 respectively, and the two ends of the outer shaft 130 are respectively clamped between the two ends of the inner shaft 120. On the one hand, it is used to prevent the outer shaft 130 from escaping to the outside of the inner shaft 120, and on the other hand, it is used to prevent the inner shaft 120 from moving axially inside the outer shaft 130 when the inner shaft 120 is rotated.

[0042] Furthermore, a positioning pin 123 is provided on at least one end of the inner shaft 120 . The positioning pin 123 passes through the inner shaft 120 along the radial direction of the inner shaft 120 , and both ends extend out of the inner shaft 120 . At least one end of the outer shaft 130 is used to abut against the positioning pin 123 .

[0043] One end of the inner shaft 120 has a rotating portion 124 that serves to stop one end of the outer shaft 130. A positioning pin 123 is provided at the other end of the inner shaft 120. Once the inner shaft 120 is inserted into the inner shaft 120, the positioning pin 123 is secured to the other end of the inner shaft 120, thereby forming a stop for the other end of the outer shaft 130. When the driven shaft needs to move axially, the rotating portion 124 can drive the inner shaft 120 to rotate.

[0044] Of course, in another embodiment, both ends of the inner shaft 120 extending out of the outer shaft 130 are provided with positioning pins 123 , and the two positioning pins 123 are respectively used to form a stop for the outer shaft 130 .

[0045] In some embodiments, the outer shaft 130 is provided with a strip-shaped protrusion 132 extending along the axial direction. 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 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.

[0046] One embodiment of the present application further provides a handle reversing device, comprising a driving wheel assembly 200, a driven wheel 310, a winding wheel 500, and a transmission mechanism 100. The driven wheel 310 and the winding wheel 500 are respectively and sequentially sleeved on the outer shaft 130 along the axial direction, and the driven wheel 310 and the winding wheel 500 rotate synchronously. The configuration of the reversing device can simultaneously meet the usage habits of doctors in both Europe and America.

[0047] An embodiment of the present application also provides an endoscope, including an insertion tube and an operating handle arranged on 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 500, and the pull rope is connected to the curved portion on the insertion tube.

[0048] When the driven wheel 310 is directly engaged with the first driving wheel 220, and the knob 240 is turned, the winding wheel 500 pulls the drawstring in a first direction, causing the curved portion of the endoscope to bend in the first direction. When the driven wheel 310 is engaged with the second driving wheel 230 via the transmission wheel 420, and the knob 240 is turned in the same direction, the winding wheel 500 pulls the drawstring in a second direction, causing the curved portion of the endoscope to bend in the second direction.

[0049] Combine Figure 4 In some embodiments, the handle includes a housing 600, with mounting slots 610 defined on two opposing sidewalls of the housing 600. The transmission mechanism 100 includes a fixing block 140, with both ends of the outer shaft 130 disposed in corresponding mounting slots 610 via the fixing blocks 140. The fixing blocks 140 are rotatable within the mounting slots 610.

[0050] In this embodiment, the fixing block 140 is used to fix the outer shaft 130 within the housing 600 while ensuring the rotation of the outer shaft 130. One end of the outer shaft 130 is axially engaged with the first fixing block 140, and the other end of the outer shaft 130 is axially engaged with the second fixing block 140. That is, when the outer shaft 130 rotates, it can drive the fixing blocks 140 to rotate in the corresponding mounting slots 610.

[0051] Furthermore, one end of the inner shaft 120 has a rotating portion 124 , and an embedding groove 620 is defined outside the housing 600 . The rotating portion 124 is embedded in the embedding groove 620 , and a non-circular slot 1241 is defined on one side of the housing 600 where the rotating portion 124 is exposed.

[0052] The insertion groove 620 is connected to the mounting groove 610, and both are circular grooves. The diameter of the mounting groove 610 is larger than that of the insertion groove 620, so that the bottom of the insertion groove 620 can form a stop for the fixed block 140. The rotating portion 124 is embedded in the insertion groove 620 to distinguish it from the knob 240 exposed outside the housing 600 and prevent accidental operation. To rotate the rotating portion 124, a key or screwdriver can be inserted into the insertion groove 620 to rotate the rotating portion 124.

[0053] 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.

[0054] 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, all of which 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 transmission mechanism, characterized in that: The transmission mechanism is used to be arranged in the reversing device, and the reversing device includes a driving wheel group, a driven wheel, a winding wheel and a transmission wheel group. 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 driven wheel and the winding wheel are respectively used to be sleeved on the outer shaft in sequence along the axial direction, and the winding wheel is fixedly connected to the outer shaft. The inner shaft can rotate relative to the outer shaft. When the inner shaft is rotated, the inner shaft is used to drive the driven wheel to move along its axial direction.

2. The transmission mechanism according to claim 1, characterized in that: The outer shaft is provided with a clearance groove with its length direction along the axial direction of the outer shaft, the inner shaft is provided with a matching groove inclined to the clearance 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.

3. The transmission mechanism according to claim 2, characterized in that: The matching groove and the air-avoiding groove are arranged at 45 degrees.

4. The transmission mechanism according to claim 2, characterized in that: The matching groove is a spiral structure, and the matching groove extends to the outside of one end of the inner shaft.

5. The transmission mechanism according to claim 2, characterized in that: Two ends of the inner shaft respectively extend out of the outer shaft, and two ends of the outer shaft are respectively sandwiched between two ends of the inner shaft.

6. The transmission mechanism according to claim 5, characterized in that: A positioning pin is provided outside at least one end of the inner shaft extending to the outer shaft. The positioning pin passes through the inner shaft along the radial direction of the inner shaft and has both ends extending outside the inner shaft. At least one end of the outer shaft is used to abut against the positioning pin.

7. A handle reversing device, characterized in that: The reversing device includes a driving wheel group, a driven wheel, a winding wheel and a transmission mechanism according to any one of claims 1 to 6. The driven wheel and the winding wheel are respectively and sequentially sleeved on the outer shaft along the axial direction, and the driven wheel and the winding wheel rotate synchronously.

8. An endoscope, characterized in that: It comprises an insertion tube and an operating handle arranged on the insertion tube, wherein the operating handle is provided with the reversing device of the handle according to claim 7, a pull rope is wound around the winding wheel, and the pull rope is connected to the curved portion on the insertion tube.

9. The endoscope according to claim 8, wherein: The handle includes a shell, and two opposite side walls of the shell are respectively provided with mounting grooves; The transmission mechanism includes a fixing block, and both ends of the outer shaft are respectively arranged in the corresponding mounting grooves through the fixing blocks, and the fixing blocks can rotate in the mounting grooves.

10. The endoscope according to claim 9, characterized in that One end of the inner shaft has a rotating part, an embedding groove is provided on the outside of the shell, the rotating part is embedded in the embedding groove, and a non-circular slot is provided on one side of the shell where the rotating part is exposed.

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