Wheel disc mechanism of angle locking device and endoscope with wheel disc mechanism

Abstract

The utility model discloses a wheel disc mechanism of an angle locking device and an endoscope with the wheel disc mechanism, the wheel disc mechanism of the angle locking device is applied to an operation part, an angle hub, a first friction plate and a friction pressing wheel are arranged in the operation part, the angle hub is rotatably arranged on the operation part, and the angle hub is used for winding an angle steel wire. The first friction plate is connected to the angle hub, the friction pressing wheel is slidably arranged in the operation part and used for being close to or away from the first friction plate, the wheel disc mechanism comprises a first wheel disc and a second wheel disc, the first wheel disc is rotatably arranged in the operation part, and a contact part is arranged at the lower end of the first wheel disc; the second wheel disc is slidably arranged in the operation part in the vertical direction, the second wheel disc is provided with a plurality of gear steps, the contact part abuts against the gear steps, and the contact part is used for pushing the second wheel disc to slide, so that the second wheel disc pushes the friction pressing wheel to extrude the first friction plate.

Description

Technical Field

[0001] The utility model relates to the technical field of endoscope locking devices, in particular to a wheel disc mechanism of an angle locking device and an endoscope with the same. Background Art

[0002] Endoscopes are widely used in the field of medical diagnosis. The bending of the endoscope's bending part is achieved by pulling a steel wire through an angle hub in the operating part, and the angle hub is driven to rotate by an angle knob. In order to fix the angle of the bending part, the angle hub must be braked. Therefore, a friction plate is provided on the angle hub, and the angle hub is braked by applying positive pressure to the friction plate, thereby maintaining the bending angle of the bending part.

[0003] However, after the bending portion of the endoscope is adjusted to a predetermined angle, the bending portion will generate a certain restoring force on the angle hub. After the endoscope has been used for a long time, the function of locking the angle will gradually fail due to the wear of the friction plate and the parts in contact with it. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a wheel mechanism of an angle locking device, which can adjust the positive pressure with the first friction plate to avoid the failure of the locking angle function.

[0005] The utility model also provides an endoscope with a wheel mechanism of the angle locking device.

[0006] According to the first aspect of the utility model, a wheel disc mechanism of an angle locking device is applied to an operating part, wherein an angle hub, a first friction plate and a friction pressure wheel are arranged in the operating part, wherein the angle hub is rotatably arranged in the operating part, wherein the angle hub is used for winding an angle steel wire, wherein the first friction plate is connected to the angle hub, wherein the friction pressure wheel is slidably arranged in the operating part, wherein the friction pressure wheel is used for approaching or moving away from the first friction plate, and wherein the wheel disc mechanism comprises: a first wheel disc rotatably arranged in the operating part, wherein a contact portion is arranged at the lower end of the first wheel disc; and a second wheel disc slidably arranged in the operating part along a vertical direction, wherein the second wheel disc is provided with a plurality of gear steps, wherein the contact portion abuts against the gear steps, and wherein the contact portion is used for pushing the second wheel disc to slide, so that the second wheel disc pushes the friction pressure wheel to squeeze the first friction plate.

[0007] According to an embodiment of the utility model, a wheel mechanism of an angle locking device has at least the following beneficial effects: the wheel mechanism has a simple structure, and the gear step is set to achieve different degrees of pressure on the second wheel, thereby locking in a gradient manner. When one of the gears fails to lock, there is no need to disassemble the machine to readjust the locking force. It is only necessary to turn the first wheel and adjust it to other locking gears to force the second wheel to push the friction pressure wheel to squeeze the first friction plate, that is, adjust it to other locking gears to ensure locking, and the operation is easy. Users can also adjust the locking force according to their personal habits, and the adjustment process is simple and convenient.

[0008] According to some embodiments of the utility model, a push post is provided at the lower end of the second wheel disc, and the push post is slidably arranged in the operating part. The push post abuts against the friction pressure wheel, and the push post is used to push the friction pressure wheel to squeeze the first friction plate. The push post is arranged to extend out to contact the friction pressure wheel, thereby providing a fulcrum for pushing the friction pressure wheel.

[0009] According to some embodiments of the utility model, a plurality of push pins are provided, and the plurality of push pins are evenly distributed along the circumference of the second wheel disc. The plurality of push pins can push the friction pressure wheel relatively smoothly to avoid deflection.

[0010] According to some embodiments of the utility model, the contact portion includes a roller shaft, which is rotatably disposed at the lower end of the first wheel disc, and the roller shaft abuts against the gear step. The arrangement of the roller shaft reduces sliding friction and facilitates contact drive between the first wheel disc and the second wheel disc.

[0011] According to some embodiments of the utility model, there are at least three contact parts, and the at least three contact parts are evenly distributed along the circumference of the first wheel disc. The gear steps are arranged in a one-to-one correspondence with the contact parts. The at least three contact parts can act on the second wheel disc in a plane, so that the lifting and lowering of the second wheel disc is smoother.

[0012] According to some embodiments of the utility model, the gear ladder includes a plurality of connected step portions, and a guide slope is arranged between two adjacent step portions. The arranged guide slope facilitates guiding the rolling of the roller shaft and can realize continuous driving of the second wheel disc to avoid a sense of frustration.

[0013] According to some embodiments of the utility model, the operating part also includes: an outer shell, the outer shell is provided with a platform, and a plurality of columns are arranged at the lower end of the platform, and the plurality of columns extend into the hole grooves on the friction pressure wheel; a sleeve, connected in the outer shell, and the friction pressure wheel and the second wheel disc are both slidably sleeved on the sleeve; a rotating shaft, rotatably arranged in the sleeve, the rotating shaft and the sleeve are coaxially arranged, and the angle hub is fixedly connected to the rotating shaft; a limiting ring, the limiting ring is arranged in the outer shell, and a second friction plate is arranged between the limiting ring and the first wheel disc; an angle knob, connected to the rotating shaft, and the angle knob is used to drive the rotating shaft to rotate; an angle lock knob, rotatably arranged on the outer shell, a shifting groove is opened on the first wheel disc, a shifting rod of the angle lock knob is inserted into the shifting groove, and the angle lock knob is used to shift the first wheel disc to rotate.

[0014] According to some embodiments of the utility model, the limit ring is interference connected to the inner wall of the outer shell, and an adjusting screw is threadedly connected to the limit ring. The lower end of the adjusting screw abuts the outer shell. The adjusting screw is used to adjust the distance of the limit ring relative to the first wheel disc, so that the driving space of the first wheel disc to the second wheel disc changes, and it is set according to needs.

[0015] According to some embodiments of the utility model, a limiting groove is opened on the peripheral wall of the sleeve, and a limiting column is radially arranged on the peripheral wall of the rotating shaft. The limiting column is inserted into the limiting groove, so that the rotating shaft can generate a certain limit when driving the angle hub to rotate, thereby avoiding excessive rotation.

[0016] According to the second aspect of the present invention, an endoscope includes a wheel mechanism of the angle locking device.

[0017] An endoscope according to an embodiment of the utility model has at least the following beneficial effects: the wheel mechanism has a simple structure, and the gear step is set to achieve different degrees of pressure on the second wheel, thereby locking in a gradient manner. When one of the gears fails to lock, there is no need to disassemble the machine to readjust the locking force. It is only necessary to turn the first wheel and adjust it to other locking gears to force the second wheel to push the friction pressure wheel to squeeze the first friction plate, that is, adjust it to other locking gears to ensure locking, and the operation is easy. Users can also adjust the locking force according to their personal habits, and the adjustment process is simple and convenient.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 This is a structural schematic diagram of the wheel mechanism of the angle locking device in the operating part of the embodiment of the utility model;

[0021] Figure 2 for Figure 1 An exploded view of a cutaway wheel mechanism of an angle locking device is shown;

[0022] Figure 3 for Figure 1 An exploded view of the wheel mechanism of the angle locking device is shown;

[0023] Figure 4 for Figure 1 The schematic structural diagram of the wheel mechanism of the angle locking device is shown.

[0024] A first wheel disc 100, a contact portion 110, and a pull slot 120;

[0025] The second wheel disc 200, the gear step 210, the step portion 211, the guide slope 212, and the push column 220;

[0026] An operating part 300, an angle hub 310, a first friction plate 320, and a second friction plate 321;

[0027] Friction pressure wheel 330, housing 340;

[0028] Sleeve 350, limiting groove 351, rotating shaft 360, limiting column 361;

[0029] Limiting ring 370 , adjusting screw 371 , angle knob 380 , angle locking knob 390 . DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0031] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] In the description of the present utility model, the meaning of "several" is one or more, the meaning of "more" is two or more, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0033] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0034] Reference Figures 1 to 4A wheel mechanism of an angle locking device is applied to an operating part 300. The operating part 300 is provided with an angle hub 310, a first friction plate 320 and a friction pressure wheel 330. The angle hub 310 is rotatably provided on the operating part 300. The angle hub 310 is used to wind an angle steel wire. The first friction plate 320 is connected to the angle hub 310. The friction pressure wheel 330 is slidably provided in the operating part 300. The friction pressure wheel 330 is used to approach or move away from the first friction plate 320. The wheel mechanism includes: a first wheel 100, which is rotatably arranged in the operating part 300, and a contact part 110 is arranged at the lower end of the first wheel 100; a second wheel 200, which is slidably arranged in the operating part 300 along the vertical direction, and the second wheel 200 is provided with a plurality of gear steps 210, and the contact part 110 abuts against the gear steps 210, and the contact part 110 is used to push the second wheel 200 to slide, so that the second wheel 200 pushes the friction pressure wheel 330 to squeeze the first friction plate 320. The wheel mechanism has a simple structure. By setting the gear step 210, different degrees of pressure can be applied to the second wheel 200, thereby achieving gradient locking. When one of the gears fails to lock, there is no need to disassemble the machine to readjust the locking force. It is only necessary to turn the first wheel 100 and adjust it to other locking gears to force the second wheel 200 to push the friction pressure wheel 330 to squeeze the first friction plate 320, that is, adjust it to other locking gears to ensure locking. The operation is convenient, and the user can also adjust the locking force according to personal habits. The adjustment process is simple and convenient. It can be understood that the sliding is axial sliding along the rotating shaft 360, the angle hub 310, the first friction plate 320 and the friction pressure wheel 330 are all coaxially arranged with the rotating shaft 360, and the first wheel 100 and the second wheel 200 abut against each other during relative rotation to force the second wheel 200 to slide, thereby providing positive pressure, converting the torque of the first wheel 100 into a linear force of the second wheel 200, and the mechanical conversion method is better, and the volume of the entire angle locking device can be reduced; in addition, the gear ladder 210 set can quantify the gear while ensuring locking, so as to facilitate direct adjustment to the predetermined gear.

[0035] In some embodiments, a push column 220 is provided at the lower end of the second wheel disc 200. The push column 220 is slidably set in the operating part 300. The push column 220 abuts against the friction pressure wheel 330. The push column 220 is used to push the friction pressure wheel 330 to squeeze the first friction plate 320. The push column 220 is arranged to extend out to contact the friction pressure wheel 330, thereby providing a fulcrum for pushing the friction pressure wheel 330.

[0036] In some embodiments, a plurality of push pins 220 are provided, and the plurality of push pins 220 are evenly distributed along the circumference of the second wheel disc 200. The plurality of push pins 220 can push the friction pressure wheel 330 relatively smoothly to avoid deflection. It is understandable that one or three push pins 220 are provided.

[0037] In some embodiments, the contact portion 110 includes a roller shaft, which is rotatably disposed at the lower end of the first wheel disc 100, and the roller shaft abuts the gear step 210. The disposed roller shaft reduces sliding friction and facilitates the contact drive between the first wheel disc 100 and the second wheel disc 200. It can be understood that the axis of the roller shaft extends radially along the first wheel disc 100, and the contact portion 110 can also include a protrusion, on which an arc structure is disposed, and the arc structure is used to contact the gear step 210. The so-called gear step 210 can be a multi-gear adjustable step, and the extension direction of the step is arranged along the circumference of the first wheel disc 100.

[0038] In some embodiments, at least three contact portions 110 are provided, and the at least three contact portions 110 are evenly distributed along the circumference of the first wheel disc 100. The gear steps 210 are provided one-to-one with the contact portions 110. The at least three contact portions 110 can act on the second wheel disc 200 in a plane, so that the lifting and lowering of the second wheel disc 200 is smoother.

[0039] In some embodiments, the gear ladder 210 includes a plurality of connected step portions 211, and a guide slope 212 is arranged between two adjacent step portions 211. The arranged guide slope 212 facilitates the rolling of the roller shaft and can realize continuous driving of the second wheel disc 200 to avoid a sense of frustration.

[0040] In some embodiments, the operating part 300 further includes: a shell 340, the shell 340 is provided with a platform, a plurality of columns are provided at the lower end of the platform, and the plurality of columns extend into the holes on the friction pressure wheel 330; a sleeve 350, connected in the shell 340, the friction pressure wheel 330 and the second wheel plate 200 are both slidably sleeved on the sleeve 350; a rotating shaft 360, rotatably arranged in the sleeve 350, the rotating shaft 360 is coaxially arranged with the sleeve 350, and the angle hub 310 is fixedly connected to the rotating shaft 360; a limit A positioning ring 370 is provided in the housing 340, and a second friction plate 321 is provided between the positioning ring 370 and the first wheel 100; an angle knob 380 is connected to the rotating shaft 360, and the angle knob 380 is used to drive the rotating shaft 360 to rotate; an angle locking knob 390 is rotatably provided on the housing 340, and a shifting groove 120 is provided on the first wheel 100, and a shifting rod of the angle locking knob 390 is inserted into the shifting groove 120, and the angle locking knob 390 is used to drive the first wheel 100 to rotate.

[0041] In some embodiments, the limit ring 370 is interference connected to the inner wall of the shell 340, and an adjusting screw 371 is threadedly connected to the limit ring 370. The lower end of the adjusting screw 371 abuts the shell 340. The adjusting screw 371 is used to adjust the distance of the limit ring 370 relative to the first wheel disc 100, so that the driving space of the first wheel disc 100 for the second wheel disc 200 changes. It is set as needed. It should be noted that at least three adjusting screws 371 are also set, and the adjusting screws 371 are also evenly distributed along the circumference of the limit ring 370.

[0042] In some embodiments, a limiting groove 351 is provided on the peripheral wall of the sleeve 350, and a limiting column 361 is radially arranged on the peripheral wall of the rotating shaft 360. The limiting column 361 is inserted into the limiting groove 351, so that the rotating shaft 360 can generate a certain limit when driving the angle hub to rotate, thereby avoiding excessive rotation.

[0043] An endoscope includes a wheel mechanism of an angle locking device. The wheel mechanism has a simple structure. By setting a gear step 210, different degrees of pressure are applied to the second wheel 200, thereby achieving gradient locking. When one of the gears fails to lock, there is no need to disassemble the machine to readjust the locking force. It is only necessary to turn the first wheel 100 and adjust it to other locking gears to force the second wheel 200 to push the friction pressure wheel 330 to squeeze the first friction plate 320, that is, adjust it to other locking gears to ensure locking. The operation is convenient, and the user can also adjust the locking force according to personal habits. The adjustment process is simple and convenient.

[0044] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A wheel mechanism of an angle locking device, characterized in that: The invention is applied to an operating part (300), wherein the operating part (300) is provided with an angle hub (310), a first friction plate (320) and a friction pressure wheel (330), wherein the angle hub (310) is rotatably arranged on the operating part (300), wherein the angle hub (310) is used for winding an angle steel wire, wherein the first friction plate (320) is connected to the angle hub (310), wherein the friction pressure wheel (330) is slidably arranged in the operating part (300), wherein the friction pressure wheel (330) is used for approaching or moving away from the first friction plate (320), and wherein the wheel mechanism comprises: A first wheel disc (100) is rotatably disposed in the operating portion (300), wherein a contact portion (110) is disposed at a lower end of the first wheel disc (100); The second wheel disc (200) is slidably arranged in the operating portion (300) along the vertical direction, and the second wheel disc (200) is provided with a plurality of gear steps (210). The contact portion (110) abuts against the gear steps (210), and the contact portion (110) is used to push the second wheel disc (200) to slide, so that the second wheel disc (200) pushes the friction pressure wheel (330) to squeeze the first friction plate (320).

2. The wheel mechanism of the angle locking device according to claim 1, characterized in that: A push column (220) is provided at the lower end of the second wheel disc (200). The push column (220) is slidably arranged in the operating portion (300). The push column (220) abuts against the friction pressure wheel (330). The push column (220) is used to push the friction pressure wheel (330) to squeeze the first friction plate (320).

3. The wheel mechanism of the angle locking device according to claim 2, characterized in that: A plurality of the push pins (220) are provided, and the plurality of the push pins (220) are evenly distributed along the circumference of the second wheel disc (200).

4. The wheel mechanism of the angle locking device according to claim 2, characterized in that: The contact portion (110) comprises a roller shaft, which is rotatably disposed at the lower end of the first wheel disc (100), and the roller shaft abuts against the gear step (210).

5. The wheel mechanism of the angle locking device according to claim 2, characterized in that: At least three contact portions (110) are provided, and the at least three contact portions (110) are evenly distributed along the circumference of the first wheel disc (100), and the gear steps (210) are provided in one-to-one correspondence with the contact portions (110).

6. The wheel mechanism of the angle locking device according to claim 5, characterized in that: The gear step (210) comprises a plurality of connected step portions (211), and a guiding inclined surface (212) is provided between two adjacent step portions (211).

7. The wheel mechanism of the angle locking device according to any one of claims 1 to 6, characterized in that: The operating unit (300) further includes: A shell (340), wherein the shell (340) is provided with a platform, a plurality of columns are provided at the lower end of the platform, and the plurality of columns extend into the holes on the friction pressure wheel (330); A sleeve (350) is connected to the housing (340), and the friction pressure wheel (330) and the second wheel disc (200) are both slidably sleeved on the sleeve (350); A rotating shaft (360) is rotatably disposed in the sleeve (350), the rotating shaft (360) and the sleeve (350) are coaxially disposed, and the angle hub (310) is fixedly connected to the rotating shaft (360); A limiting ring (370), wherein the limiting ring (370) is arranged in the housing (340), and a second friction plate (321) is arranged between the limiting ring (370) and the first wheel disc (100); An angle knob (380) connected to the rotating shaft (360), the angle knob (380) being used to drive the rotating shaft (360) to rotate; The angle locking knob (390) is rotatably arranged on the housing (340); a shifting groove (120) is provided on the first wheel disc (100); a shifting rod of the angle locking knob (390) is inserted into the shifting groove (120); and the angle locking knob (390) is used to shift the first wheel disc (100) to rotate.

8. The wheel mechanism of the angle locking device according to claim 7, characterized in that: The limiting ring (370) is interference-connected to the inner wall of the outer shell (340); an adjusting screw (371) is threadedly connected to the limiting ring (370); the lower end of the adjusting screw (371) abuts against the outer shell (340); and the adjusting screw (371) is used to adjust the distance of the limiting ring (370) relative to the first wheel disc (100).

9. The wheel mechanism of the angle locking device according to claim 7, characterized in that: A limiting groove (351) is provided on the peripheral wall of the sleeve (350), and a limiting column (361) is radially arranged on the peripheral wall of the rotating shaft (360), and the limiting column (361) is inserted into the limiting groove (351).

10. An endoscope, characterized in that: A wheel mechanism comprising the angle locking device as described in any one of claims 1-9.

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