Adjusting handle speed change structure for endoscope

Abstract

The utility model relates to an adjusting handle speed change structure for an endoscope, which comprises a steering gear, a rotating shaft and a speed change gear, and the steering gear is coaxially connected to a rotating wheel; the rotating shaft comprises a circular section and a square section, the circular section of the rotating shaft is rotationally connected with the endoscope shell, the rotating shaft is in sliding connection with the steering gear in the axial direction of the steering gear, and a square hole allowing the square section to penetrate is formed in the center of the steering gear; the change gear is rotationally arranged in the endoscope shell, a matching gear is coaxially connected to the rotating shaft, and when the rotating shaft moves in the axial direction of the rotating shaft, the matching gear is engaged with or disengaged from the change gear; the diameter of the change gear is smaller than that of the matching gear, an auxiliary gear is coaxially connected to a rotating shaft of the change gear, the auxiliary gear and the steering gear are the same in diameter and tooth number, the diameter of the matching gear is larger than that of the steering gear, and the auxiliary gear is meshed with the steering gear. A driving piece for controlling the rotating shaft to move in the axial direction is arranged on the rotating shaft. Medical staff can operate and adjust the handle conveniently.

Description

Technical Field

[0001] The utility model relates to the field of endoscopes, in particular to a speed-changing structure of an adjusting handle for an endoscope. Background Art

[0002] An endoscope is a lighted tube that can be passed through the mouth and into the stomach or other natural orifices in the body. It is very useful to doctors because it allows them to see things that X-rays cannot.

[0003] When an endoscope is used clinically, it is often necessary to perform surgery by rotating the head end of the endoscope. The rotating wheel is rotatably arranged inside the endoscope housing, and the adjusting handle is rotatably arranged outside the endoscope housing. The adjusting handle drives the rotating wheel to rotate synchronously through the rotating shaft, and the rotating shaft is rotatably connected to the endoscope housing.

[0004] During the actual use of the endoscope, medical staff have different hand sizes, and there are differences in the difficulty of operating when turning the adjustment handle to control the direction of the lens. During operation, medical staff with smaller hands will find it more difficult to control the rotation of the wheel to the same angle than medical staff with larger hands, which can easily affect the work efficiency of medical staff. Therefore, the ease of operation of the endoscope adjustment handle needs to be improved. Utility Model Content

[0005] In order to solve the above technical problems, the present application provides a speed change structure of an adjustment handle for an endoscope.

[0006] The present application provides an endoscope adjustment handle speed change structure adopts the following technical solution:

[0007] A speed change structure of an adjustment handle for an endoscope, comprising a steering gear, a rotating shaft and a speed change gear, wherein the steering gear is coaxially connected to a rotating wheel and drives the rotating wheel to rotate synchronously;

[0008] One end of the rotating shaft passes through the endoscope housing and is fixedly connected to the adjustment handle, and the other end of the rotating shaft passes through the endoscope housing and is rotatably connected to the endoscope housing; the rotating shaft includes a circular section and a square section, the circular section of the rotating shaft is rotatably connected to the endoscope housing, the rotating shaft is slidably connected to the steering gear along the axial direction of the steering gear, and a square hole is opened in the center of the steering gear for the square section to pass through;

[0009] The speed change gear is rotatably arranged in the endoscope housing, and a matching gear is coaxially connected to the rotating shaft. When the rotating shaft moves along its own axial direction, the matching gear is engaged or disengaged with the speed change gear;

[0010] The diameter of the speed change gear is smaller than that of the matching gear. An auxiliary gear is coaxially connected to the rotating shaft of the speed change gear. The diameter and number of teeth of the auxiliary gear and the steering gear are the same. The diameter of the matching gear is larger than that of the steering gear. The auxiliary gear meshes with the steering gear.

[0011] When the square section of the rotating shaft is located outside the square hole, the matching gear is meshed with the speed gear, and the auxiliary gear is also meshed with the steering gear; when the square section of the rotating shaft penetrates into the square hole, the matching gear is disengaged from the speed gear;

[0012] The rotating shaft is provided with a driving member for controlling the rotating shaft to move along the axial direction.

[0013] By adopting the above technical solution, when a medical staff with smaller hands uses an endoscope, the square section of the rotating shaft is controlled by the driving member to be located outside the square hole, so that the matching gear is meshed with the speed gear, and the auxiliary gear is meshed with the steering gear. At this time, the adjusting handle is turned, and the adjusting handle drives the speed gear to rotate through the matching gear, and the speed gear drives the auxiliary gear to rotate, and the auxiliary gear drives the steering gear to rotate, thereby driving the rotating wheel to rotate. Since the diameter of the speed gear is smaller than the diameter of the matching gear, and the diameter of the matching gear is larger than the diameter of the steering gear, the diameter and number of teeth of the auxiliary gear and the steering gear are the same, when the rotating wheel needs to rotate by the same angle, under the cooperation of the speed gear and the matching gear, the stroke of the adjusting handle required to be turned is shortened, thereby making it easier for medical staff with smaller hands to operate the adjusting handle;

[0014] When medical staff with larger hands use the endoscope, there is no need to adjust the speed. At this time, the driving member moves the rotating shaft until the square section of the rotating shaft passes through the square hole, so that the matching gear and the speed gear are disengaged. At this time, the adjusting handle is turned, and the adjusting handle drives the rotating shaft to rotate. The rotating shaft drives the steering gear to rotate through the cooperation of the square section and the square hole, thereby driving the rotating wheel to rotate.

[0015] Preferably, the ratio of the diameter of the speed change gear to the diameter of the mating gear is 1:2.

[0016] Preferably, the driving member includes a driving rod, one end of which is located outside the endoscope housing, and the other end of the driving rod penetrates into the endoscope housing and is slidably connected to the endoscope housing, and the end of the driving rod located inside the endoscope housing passes through a rotating wheel and is slidably connected to the rotating wheel, and after passing through the rotating wheel, the driving rod is fixedly connected to the square section of the rotating shaft, and there is friction between the outer peripheral wall of the driving rod and the endoscope housing.

[0017] By adopting the above technical solution, when medical staff with smaller hands use the endoscope, they slide the drive rod along the axial direction of the rotating shaft until the square section is outside the square hole, and make the matching gear mesh with the speed gear and the auxiliary gear mesh with the steering gear.

[0018] Preferably, a circular button is coaxially connected to one end of the driving rod located outside the endoscope housing, and the diameter of the circular button is larger than the diameter of the driving rod.

[0019] By adopting the above technical solution, it is convenient for medical personnel to operate the driving rod and prevent the driving rod from falling into the endoscope housing.

[0020] Preferably, a surface of the circular button away from the endoscope housing is curved.

[0021] Preferably, a connecting column is provided on a surface of the steering gear close to the rotating wheel, an end of the connecting column away from the steering gear is fixedly connected to the bottom surface of the rotating wheel, and a plurality of connecting columns are equidistantly provided along the circumference of the steering gear.

[0022] By adopting the above technical solution, the stability of the steering gear driving the rotating wheel to rotate is improved.

[0023] In summary, this application includes the following beneficial technical effects:

[0024] When medical personnel with smaller hands use the endoscope, the square section of the rotating shaft is controlled by the driving member to be located outside the square hole, so that the matching gear is meshed with the speed gear and the auxiliary gear is meshed with the steering gear. At this time, the adjusting handle is turned, and the adjusting handle drives the speed gear to rotate through the matching gear, and the speed gear drives the auxiliary gear to rotate, and the auxiliary gear drives the steering gear to rotate, thereby driving the rotating wheel to rotate. Since the diameter of the speed gear is smaller than the diameter of the matching gear, and the diameter of the matching gear is larger than the diameter of the steering gear, the diameter and number of teeth of the auxiliary gear and the steering gear are the same, when the rotating wheel needs to rotate by the same angle, the travel required to turn the adjusting handle is shortened under the cooperation of the speed gear and the matching gear, thereby making it easier for medical personnel with smaller hands to operate the adjusting handle. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall cross-sectional structure of a speed change structure of an endoscope adjustment handle in an embodiment of the present application.

[0026] Figure 2 It is a structural schematic diagram used to display the rotating shaft in the embodiment of the present application.

[0027] Figure 3 It is a structural schematic diagram used to demonstrate the coordination between the auxiliary gear and the steering gear in the embodiment of the present application.

[0028] Figure 4 It is a structural schematic diagram used to demonstrate the coordination between the speed change gear and the mating gear in the embodiment of the present application.

[0029] Explanation of the accompanying drawings: 1. Endoscope housing; 2. Adjustment handle; 3. Rotating wheel; 4. Steering gear; 41. Connecting column; 42. Square hole; 5. Rotating shaft; 51. Circular section; 52. Square section; 53. Transition section; 6. Speed ​​change gear; 7. Matching gear; 8. Auxiliary gear; 9. Driving member; 91. Driving rod; 92. Round button. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-4 This application is described in further detail.

[0031] The embodiment of the present application discloses a speed change structure of an adjustment handle 2 for an endoscope.

[0032] Reference Figure 1-4 The speed change structure of the endoscope adjustment handle includes a steering gear 4, a rotating shaft 5 and a speed change gear 6. The steering gear 4 is coaxially connected to the rotating wheel 3 and drives the rotating wheel 3 to rotate synchronously. The rotating wheel 3 and the steering gear 4 are both rotatably arranged in the endoscope housing 1. The rotating wheel 3 and the steering gear 4 do not have axial displacement. A limiting member for axially limiting the rotating wheel 3 is arranged in the endoscope housing 1, which is not shown here.

[0033] A connecting column 41 is provided on the surface of the steering gear 4 close to the rotating wheel 3. The end of the connecting column 41 away from the steering gear 4 is fixedly connected to the bottom surface of the rotating wheel 3. A plurality of connecting columns 41 are equidistantly arranged along the circumference of the steering gear 4. In the present embodiment, the number of the connecting columns 41 is four, which improves the stability of the steering gear 4 driving the rotating wheel 3 to rotate.

[0034] One end of the rotating shaft 5 passes through the endoscope housing 1 and is fixedly connected to the adjustment handle 2, and the other end of the rotating shaft 5 passes through the endoscope housing 1 and is rotationally connected to the endoscope housing 1. The rotating shaft 5 includes a circular section 51 and a square section 52, the square section 52 is coaxially connected to the top of the circular section 51, and a transition section 53 is provided between the square section 52 and the circular section 51. The diameter of the transition section 53 is smaller than the side length of the square section 52, so as to facilitate the movement of the square section 52. The circular section 51 of the rotating shaft 5 is rotationally connected to the endoscope housing 1, and the rotating shaft 5 is slidingly connected to the steering gear 4 along the axial direction of the steering gear 4, and a square hole 42 is provided in the center of the steering gear 4 for the square section 52 to penetrate.

[0035] The speed change gear 6 is rotatably arranged in the endoscope housing 1, and a matching gear 7 is coaxially connected to the rotating shaft 5, and the matching gear 7 is arranged on the transition section 53. When the rotating shaft 5 moves along its own axial direction, the matching gear 7 is engaged or disengaged with the speed change gear 6.

[0036] The diameter of the speed gear 6 is smaller than that of the mating gear 7, and the ratio of the diameter of the speed gear 6 to that of the mating gear 7 is 1:2. An auxiliary gear 8 is coaxially connected to the rotating shaft of the speed gear 6, and the auxiliary gear 8 has the same diameter and number of teeth as the steering gear 4, and the diameter of the mating gear 7 is larger than that of the steering gear 4, and the auxiliary gear 8 meshes with the steering gear 4.

[0037] When the square section 52 of the rotating shaft 5 is located outside the square hole 42, the matching gear 7 is meshed with the speed gear 6, and the auxiliary gear 8 is also meshed with the steering gear 4; when the square section 52 of the rotating shaft 5 penetrates into the square hole 42, the matching gear 7 is disengaged from the speed gear 6, and the auxiliary gear 8 is still meshed with the steering gear 4, and the auxiliary gear 8 and the speed gear 6 are in an idling state.

[0038] The rotating shaft 5 is provided with a driving member 9 for controlling the axial movement of the rotating shaft 5. The driving member 9 includes a driving rod 91, one end of which is located outside the endoscope housing 1, and the other end of the driving rod 91 penetrates into the endoscope housing 1 and is slidably connected to the endoscope housing 1. The end of the driving rod 91 located inside the endoscope housing 1 passes through the rotating wheel 3 and is slidably connected to the rotating wheel 3. After passing through the rotating wheel 3, the driving rod 91 is fixedly connected to the square section 52 of the rotating shaft 5, and there is friction between the outer peripheral wall of the driving rod 91 and the endoscope housing 1.

[0039] A circular button 92 is coaxially connected to one end of the driving rod 91 outside the endoscope housing 1. The diameter of the circular button 92 is larger than the diameter of the driving rod 91. The side of the circular button 92 away from the endoscope housing 1 is curved, which is convenient for medical staff to operate the driving rod 91 and prevent the driving rod 91 from falling into the endoscope housing 1.

[0040] The implementation principle of the speed change structure of the endoscope adjustment handle in the embodiment of the present application is as follows:

[0041] When a medical staff with smaller hands uses the endoscope, the driving member 9 is pulled up in a direction away from the endoscope housing 1, and the square section 52 of the control shaft 5 is located outside the square hole 42, so that the matching gear 7 is meshed with the speed gear 6, and the auxiliary gear 8 is meshed with the steering gear 4. At this time, the adjusting handle 2 is rotated, and the adjusting handle 2 drives the speed gear 6 to rotate through the matching gear 7, and the speed gear 6 drives the auxiliary gear 8 to rotate, and the auxiliary gear 8 drives the steering gear 4 to rotate, thereby driving the rotating wheel 3 to rotate. Since the diameter of the speed gear 6 is smaller than the diameter of the matching gear 7, and the diameter of the matching gear 7 is larger than the diameter of the steering gear 4, the diameter and number of teeth of the auxiliary gear 8 and the steering gear 4 are the same, so when the rotating wheel 3 needs to rotate the same angle, under the cooperation of the speed gear 6 and the matching gear 7, the stroke required to turn the adjusting handle 2 is shortened, thereby making it easier for medical staff with smaller hands to operate the adjusting handle 2.

[0042] When medical personnel with larger hands use the endoscope, there is no need to adjust the speed. The driving member 9 is pulled up and pressed in the direction close to the endoscope housing 1 to move the rotating shaft 5 until the square section 52 of the rotating shaft 5 penetrates into the square hole 42, so that the matching gear 7 is disengaged from the speed gear 6. At this time, the adjusting handle 2 is turned, and the adjusting handle 2 drives the rotating shaft 5 to rotate. The rotating shaft 5 drives the steering gear 4 to rotate through the cooperation of the square section 52 and the square hole 42, thereby driving the rotating wheel 3 to rotate.

[0043] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A speed change structure of an adjustment handle for an endoscope, characterized in that: It comprises a steering gear (4), a rotating shaft (5) and a speed change gear (6), wherein the steering gear (4) is coaxially connected to the rotating wheel (3) and drives the rotating wheel (3) to rotate synchronously; One end of the rotating shaft (5) passes through the endoscope housing (1) and is fixedly connected to the adjustment handle (2), and the other end of the rotating shaft (5) passes through the endoscope housing (1) and is rotationally connected to the endoscope housing (1); the rotating shaft (5) comprises a circular section (51) and a square section (52), the circular section (51) of the rotating shaft (5) is rotationally connected to the endoscope housing (1), the rotating shaft (5) is slidably connected to the steering gear (4) along the axial direction of the steering gear (4), and a square hole (42) is provided at the center of the steering gear (4) for the square section (52) to pass through; The speed change gear (6) is rotatably arranged in the endoscope housing (1), and a matching gear (7) is coaxially connected to the rotating shaft (5). When the rotating shaft (5) moves along its own axial direction, the matching gear (7) engages with or disengages from the speed change gear (6); The diameter of the speed change gear (6) is smaller than the diameter of the matching gear (7); an auxiliary gear (8) is coaxially connected to the rotating shaft of the speed change gear (6); the auxiliary gear (8) and the steering gear (4) have the same diameter and the same number of teeth; the diameter of the matching gear (7) is larger than the diameter of the steering gear (4); and the auxiliary gear (8) is meshed with the steering gear (4); When the square section (52) of the rotating shaft (5) is located outside the square hole (42), the matching gear (7) is meshed with the speed gear (6), and the auxiliary gear (8) is also meshed with the steering gear (4); when the square section (52) of the rotating shaft (5) penetrates into the square hole (42), the matching gear (7) is disengaged from the speed gear (6); The rotating shaft (5) is provided with a driving member (9) for controlling the rotating shaft (5) to move in the axial direction.

2. The speed change structure of the endoscope adjustment handle according to claim 1, characterized in that: The ratio of the diameter of the speed change gear (6) to the diameter of the matching gear (7) is 1:

2.

3. The speed change structure of the endoscope adjustment handle according to claim 1, characterized in that: The driving member (9) comprises a driving rod (91), one end of which is located outside the endoscope housing (1), and the other end of which penetrates into the endoscope housing (1) and is slidably connected to the endoscope housing (1); the end of the driving rod (91) located inside the endoscope housing (1) passes through the rotating wheel (3) and is slidably connected to the rotating wheel (3); after passing through the rotating wheel (3), the driving rod (91) is fixedly connected to the square section (52) of the rotating shaft (5); and there is friction between the outer peripheral wall of the driving rod (91) and the endoscope housing (1).

4. The speed change structure of the endoscope adjustment handle according to claim 3, characterized in that: One end of the driving rod (91) located outside the endoscope housing (1) is coaxially connected to a circular button (92), and the diameter of the circular button (92) is greater than the diameter of the driving rod (91).

5. The speed change structure of the endoscope adjustment handle according to claim 4, characterized in that: The side of the circular button (92) away from the endoscope housing (1) is in the form of an arc surface.

6. The speed change structure of the endoscope adjustment handle according to claim 1, characterized in that: A connecting column (41) is provided on a surface of the steering gear (4) close to the rotating wheel (3); an end of the connecting column (41) away from the steering gear (4) is fixedly connected to the bottom surface of the rotating wheel (3); and a plurality of connecting columns (41) are equidistantly provided along the circumference of the steering gear (4).

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