Positioning device for grinding the tip of a biliary channel endoscope

Abstract

The utility model discloses a kind of positioning devices for grinding superfine biliary tract mirror head end optical fiber, it is related to medical instrument technical field, and it includes: base, the base is set on optical fiber grinder;Rotary frame, the rotary frame rotation is set on the base;Clamping component, the clamping component is set on the rotary frame, for the superfine biliary tract mirror clamping fixed and make superfine biliary tract mirror head end optical fiber resist pressure to optical fiber grinder;The utility model adjusts the angle of microimaging piece, without taking out superfine biliary tract mirror can observe its end face and side surface grinding state, realize once clamping to complete grinding, avoid the "diamond face" defect caused by traditional repeated clamping, improve optical fiber light transmittance and imaging definition, substantially improve product pass rate, reduce cost waste;Meanwhile, save tedious steps such as pause grinding, take out detection, improve grinding efficiency and operation convenience, ensure to meet the high-precision quality standard of medical equipment to optical element.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a positioning device for grinding ultra-fine optical fibers at the end of a biliary tract lens. Background Technology

[0002] In the field of minimally invasive medical diagnosis and treatment, the cholangioscope is a key device for diagnosing and treating biliary tract diseases. The optical performance of the fiber optic cable at the lens end directly determines the image quality, which in turn affects the doctor's accurate judgment of the lesion. As medical technology develops towards precision, the demand for ultra-thin cholangioscopes continues to grow due to their ability to penetrate narrower bile duct spaces. The grinding precision of the fiber optic cable at the lens end has become a core factor in ensuring the performance of the equipment, placing higher demands on the stability and accuracy of the grinding process.

[0003] Currently, the grinding of the optical fiber at the end of ultra-thin cholangioscope lenses in the industry still mainly relies on traditional manual processes. In practice, operators must hold the ultra-thin cholangioscope body throughout the process, precisely align the optical fiber at the end of the lens with the grinding disc of the fiber grinder, and maintain constant pressure to perform the grinding operation. This process not only relies on the operator's experience to control the pressure and grinding angle, but a single grinding session usually lasts for tens of minutes. Maintaining a fixed posture for a long time can easily lead to arm pain and muscle fatigue.

[0004] Due to the lack of real-time monitoring methods, operators need to pause the grinding process periodically, remove the ultra-fine cholangioscope from the grinding machine, and check the grinding progress and smoothness of the fiber end face using specialized testing equipment. Each time the fiber is removed and re-clamped, it is difficult to ensure that the relative position of the fiber and the grinding disc is completely consistent. Repeated clamping can lead to local over-grinding or uneven grinding of the fiber end face, resulting in "diamond surface" defects. This reduces the fiber transmittance, impairs imaging clarity, and ultimately reduces the product qualification rate, failing to meet the high-precision quality standards of medical equipment for optical components. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a positioning device for grinding the fiber optic end of an ultra-fine biliary lens, which solves the problem that repeated clamping of the ultra-fine biliary lens affects the grinding quality and efficiency when observing the fiber optic end of an ultra-fine biliary lens.

[0006] This application provides a positioning device for grinding ultra-fine optical fibers at the end of a biliary tract lens, comprising:

[0007] A base, which is mounted on a fiber polishing machine;

[0008] A rotating frame, which is rotatably mounted on the base;

[0009] A clamping assembly is disposed on the rotating frame for clamping and fixing the ultra-fine cholangioscope and pressing the optical fiber at the end of the ultra-fine cholangioscope against the optical fiber polishing machine.

[0010] A rotating rod is rotatably mounted on the rotating frame. The rotating frame rotates in a first direction on the base, and the rotating rod rotates in a second direction on the rotating frame. The first direction and the second direction are opposite directions.

[0011] A microscopic imaging element is disposed on the rotating rod and is used to acquire images of the optical fiber at the end of the ultra-fine biliary lens.

[0012] In one feasible implementation, the clamping assembly includes:

[0013] A slide rail, which is vertically arranged on one side of the rotating frame;

[0014] Quick clamp, which is slidably mounted on the slide rail;

[0015] A stop block is provided on the rotating frame and on the same side as the slide rail. The stop block is used to abut against the quick clamp in the opposite direction when the quick clamp moves along the slide rail to reach a preset distance from the fiber polishing machine.

[0016] In one feasible implementation, the clamping assembly further includes:

[0017] A spring limiting block is disposed at the top of the slide rail;

[0018] A spring is disposed between the spring limiting block and the quick clamp.

[0019] In one feasible implementation, a spring guide post is vertically provided on the quick clamp, the spring guide post slides through the spring limiting block, and the spring is sleeved on the spring guide post.

[0020] In one feasible implementation, the quick clamp is provided with a micrometer. When the quick clamp moves along the slide rail to a preset distance from the fiber polishing machine, the stop block abuts against the micrometer in the opposite direction.

[0021] In one feasible implementation, the maximum rotation angle of the rotating frame on the base is 90 degrees, and the maximum rotation angle of the rotating rod on the rotating frame is 90 degrees.

[0022] In one feasible implementation, the rotating frame is provided with a first extension and a second extension, the first extension and the second extension are arranged perpendicularly, the first extension is provided with a first pin, the rotating rod is provided with a second pin, the first pin is rotatably mounted on the base, and the second pin is rotatably mounted on the second extension.

[0023] In one feasible implementation, the rotating frame on the base and the rotating rod on the rotating frame are both locked by spring balls.

[0024] In one feasible implementation, the focal point of the microscopic imaging element is located at the fiber position at the end of the ultra-fine cholangioscope lens, and the length direction of the microscopic imaging element is perpendicular to the length direction of the ultra-fine cholangioscope.

[0025] In one feasible implementation, the microscopic imaging element is a video microscope lens.

[0026] This invention provides a positioning device for grinding ultra-fine optical fibers at the end of a biliary lens, which has the following advantages:

[0027] This invention allows for observation of the end face and side grinding status of the microscopic imaging component by adjusting the angle of the component, without removing the ultra-fine cholangioscope. This enables grinding to be completed in a single clamping operation, avoiding the "diamond surface" defect caused by repeated clamping in traditional methods. It improves the light transmittance and imaging clarity of the optical fiber, significantly increases the product qualification rate, and reduces cost waste. At the same time, it eliminates the cumbersome steps of pausing grinding and removing the component for testing, improving grinding efficiency and ease of operation, and ensuring that the high-precision quality standards of medical equipment for optical components are met. Attached Figure Description

[0028] Figure 1 A three-dimensional structural schematic diagram of a positioning device and an optical fiber polishing machine for polishing ultra-fine biliary lens end optical fiber provided for embodiments of this utility model;

[0029] Figure 2 A first three-dimensional structural schematic diagram of a positioning device for grinding ultra-fine optical fibers at the end of a biliary tract lens, provided for an embodiment of this utility model;

[0030] Figure 3 A three-dimensional structural diagram of a positioning device base for grinding ultra-fine biliary tract lens end optical fiber provided for an embodiment of this utility model;

[0031] Figure 4 A three-dimensional structural diagram of a positioning device for grinding ultra-fine biliary lens end optical fiber, including a rotating rod and a rotating frame, provided for an embodiment of this utility model.

[0032] Figure 5A second three-dimensional structural schematic diagram of a positioning device for grinding ultra-fine optical fibers at the end of a biliary tract lens, provided for an embodiment of this utility model;

[0033] Figure 6 A front view of a positioning device for grinding ultra-fine optical fibers at the end of a biliary tract lens, provided in an embodiment of this utility model;

[0034] Figure 7 for Figure 2 An enlarged view of part A of a positioning device for grinding ultra-fine optical fibers at the end of a biliary lens, provided in an embodiment of this utility model.

[0035] In the diagram: 1. Ultra-fine cholangioscope; 2. Base; 201. Mounting hole; 202. First rotating groove; 203. First pin hole; 3. Rotating frame; 301. First extension; 302. Second extension; 3021. Second pin hole; 3022. Second rotating groove; 4. Slide rail; 5. Spring limit block; 6. Spring; 7. Rotating rod; 8. Handle; 9. Microscopic imaging component; 10. Quick clamp; 11. Stop block; 12. Micrometer; 13. Spring guide post; 14. First pin; 15. Second pin; 16. Fiber optic polisher; 17. Connecting rod. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0037] In the following description, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more, and "several" means one or more.

[0038] Furthermore, in this application, directional terms such as "upper," "lower," "inner," and "outer" are defined relative to the indicated placement of the components in the accompanying drawings. It should be understood that these directional terms are relative concepts, used for relative description and clarification, and can change accordingly depending on the placement of the components in the accompanying drawings.

[0039] To facilitate understanding of the technical solutions of the embodiments of this application by those skilled in the art, the technical terms involved in the embodiments of this application will be explained below.

[0040] A fiber optic polishing machine is a specialized piece of equipment used for processing the end faces of fiber optic connectors. Through specific polishing procedures and parameter settings, it grinds and polishes the end faces of optical fibers to achieve more precise optical coupling and reduce signal loss during fiber optic connections. It is widely used in the field of optical communication.

[0041] The ultra-thin cholangioscope is a minimally invasive surgical instrument used for the diagnosis and treatment of biliary tract diseases. Its thin body can be inserted into the bile duct through a small incision, allowing doctors to observe the internal condition and perform procedures such as stone removal and stricture dilation. It has the advantages of minimal trauma and rapid recovery. The optical fiber at the tip is the core component responsible for the ultra-thin cholangioscope. It can transmit illumination light to illuminate the inside of the bile duct and transmit the acquired image signals to allow doctors to see the internal condition and assist in completing various diagnostic and treatment procedures.

[0042] The embodiments of this application will now be described with reference to the accompanying drawings.

[0043] This application provides a positioning device for grinding ultra-fine optical fibers at the end of a biliary tract lens. Please refer to [link / reference]. Figure 1 , Figure 1 A three-dimensional structural diagram of a positioning device and fiber polishing machine for grinding ultra-fine biliary tract lens end optical fibers provided for embodiments of this utility model is shown below. Figure 1 As shown, the device includes a base 2, a rotating frame 3, a clamping assembly, a rotating rod 7, and a microscopic imaging element 9.

[0044] Please see Figure 2 and Figure 3 , Figure 2 This is a first three-dimensional structural schematic diagram of a positioning device for grinding ultra-fine optical fibers at the end of a biliary tract lens, provided as an embodiment of the present invention. Figure 3 A three-dimensional structural diagram of a positioning device base for grinding ultra-fine biliary tract lens optical fibers provided in an embodiment of this utility model is shown below. Figure 1-3 As shown.

[0045] The base 2 is mounted on the fiber polishing machine 16. Specifically, the base 2 may have several mounting holes 201. Several screws (not shown in the figure) pass through the mounting holes 201 and are threadedly connected to several threaded holes (not shown in the figure) on the fiber polishing machine 16. The base 2 can be mounted on the upper surface of the fiber polishing machine 16. For example, the number of mounting holes 201, screws and threaded holes may all be two.

[0046] Please see Figure 4 , Figure 5 and Figure 6 , Figure 4 This is a three-dimensional structural diagram of a positioning device for grinding ultra-fine optical fibers at the end of a biliary lens, including a rotating rod and a rotating frame, provided as an embodiment of the present invention. Figure 5This is a second three-dimensional structural diagram of a positioning device for grinding ultra-fine optical fibers at the end of a biliary lens, provided as an embodiment of the present invention. Figure 6 A front view of a positioning device for grinding ultra-fine optical fibers at the end of a biliary tract lens, as provided in an embodiment of this utility model. Figure 1-6 As shown.

[0047] The rotating frame 3 is rotatably mounted on the base 2. Specifically, the base 2 may have a first rotating groove 202, and a pair of first pin holes 203 are provided on opposite sides of the first rotating groove 202. The rotating frame 3 may have a first extension 301, and a first pin 14 is provided on the first extension 301. The two ends of the first pin 14 are rotatably mounted in the pair of first pin holes 203, so that the rotating frame 3 is rotatably connected to the base 2. The direction of rotation of the rotating frame 3 on the base 2 is a first direction. Figure 6 In the counterclockwise direction from the main viewpoint, the rotating frame 3 can be locked on the base 2 by spring balls (not shown in the figure) so that the rotating frame 3 can remain stable on the base 2 before and after rotation.

[0048] The rotating rod 7 is rotatably mounted on the rotating frame 3. Specifically, the rotating frame 3 may be provided with a second extension 302, which may be perpendicular to the first extension 301. The second extension 302 has a second rotating groove 3022, and a pair of second pin holes 3021 are provided on both sides of the second rotating groove 3022. The rotating rod 7 may be provided with a second pin 15, the two ends of which are rotatably mounted in the pair of second pin holes 3021, so that the rotating rod 7 is rotatably connected to the rotating frame 3. The direction in which the rotating rod 7 rotates on the rotating frame 3 is a second direction, and the first direction is the opposite of the second direction. Figure 6 In the clockwise direction from the main viewpoint, the rotating rod 7 is locked on the rotating frame 3 by spring balls (not shown in the figure), so that the rotating rod 7 can remain stable on the rotating frame 3 before and after rotation. A handle 8 can be provided on the rotating rod 7, and the operator can rotate the rotating rod 7 by operating the handle 8.

[0049] The microscopic imaging element 9 is mounted on the rotating rod 7 and is used to acquire images of the optical fiber at the tip of the ultra-fine choledochoscope 1. In some embodiments, the microscopic imaging element 9 can be a video microscope head.

[0050] Specifically, a connecting rod 17 can be provided on the rotating rod 7, and a microscopic imaging element 9 can be provided on the connecting rod 17. The length direction of the microscopic imaging element 9 can be the same as the length direction of the rotating rod 7. The ultra-fine choledochoscope 1 is fixed on the rotating frame 3 by the clamping assembly. The focal point of the microscopic imaging element 9 is the position of the optical fiber at the tip of the ultra-fine choledochoscope 1. When grinding the optical fiber at the tip of the ultra-fine choledochoscope 1, the ultra-fine choledochoscope 1 can be in a vertical state, and the length direction of the microscopic imaging element 9 can be perpendicular to the length direction of the ultra-fine choledochoscope 1, that is, the microscopic imaging element 9 can be in a horizontal state.

[0051] In some embodiments, the maximum rotation angle of the rotating frame 3 on the base 2 is 90 degrees, and the maximum rotation angle of the rotating rod 7 on the rotating frame 3 is 90 degrees.

[0052] Specifically, when the optical fiber at the tip of the ultra-fine cholangioscope 1 needs to be observed after a period of grinding, the rotating frame 3 is rotated 90 degrees along the first direction on the base 2. After rotation, the rotating frame 3 is kept stable by spring ball locking. When the rotating frame 3 rotates, it drives the rotating rod 7 to rotate synchronously. The rotating rod 7 is... Figure 6 The horizontal position of the ultra-thin choledochoscope 1 is changed to a vertical position, and the ultra-thin choledochoscope 1 changes from a vertical position to a horizontal position. At this time, the side of the optical fiber at the head end of the ultra-thin choledochoscope 1 can be observed through the microscopic imaging element 9. Then, the operator rotates the rotating rod 7 90 degrees along the second direction on the rotating frame 3. At this time, the microscopic imaging element 9 is coaxial with the ultra-thin choledochoscope 1, and the operator can observe the grinding condition of the end face of the optical fiber at the head end of the ultra-thin choledochoscope 1. After the observation is completed, the operation is restored to the initial state (the operation steps are: rotate the rotating rod 7 90 degrees along the first direction on the rotating frame 3, and then rotate the rotating frame 3 90 degrees along the second direction on the base 2), and then continue grinding. By adjusting the angle of the microscopic imaging element 9, the operator can observe the grinding condition of its end face and side without removing the ultra-thin choledochoscope 1, realizing grinding can be completed in one clamping, improving the quality and efficiency of grinding.

[0053] Please see Figure 7 , Figure 7 for Figure 2 An enlarged view of part A of a positioning device for grinding ultra-fine optical fibers at the end of a biliary tract lens, provided in an embodiment of this utility model, is shown below. Figure 2 , Figure 5 , Figure 6 and Figure 7 As shown.

[0054] The clamping assembly is mounted on the rotating frame 3 and is used to clamp and fix the ultra-fine choledochoscope 1 and press the optical fiber at the tip of the ultra-fine choledochoscope 1 against the optical fiber polishing machine 16. Specifically, the clamping assembly can be mounted on one side of the rotating frame 3 so that when the clamping assembly fixes the ultra-fine choledochoscope 1, the optical fiber at the tip of the ultra-fine choledochoscope 1 is located above the polishing component of the optical fiber polishing machine 16.

[0055] The clamping assembly includes a slide rail 4, a quick clamp 10, and a stop block 11.

[0056] The slide rail 4 can be vertically mounted on one side of the rotating frame 3. For example, the slide rail 4 is vertically mounted on one side of the rotating frame 3 by screws.

[0057] The quick-clamp 10 is slidably mounted on the slide rail 4. The quick-clamp 10 is used to quickly fix the ultra-fine cholangioscope 1, keeping the optical fiber at the tip of the ultra-fine cholangioscope 1 vertical during the polishing process. When the quick-clamp 10 slides vertically on the slide rail 4, it can move the ultra-fine cholangioscope 1 vertically. Because the quick-clamp 10 has a certain weight, its own gravity ensures that the end of the optical fiber at the tip of the ultra-fine cholangioscope 1 is always pressed against the fiber polishing machine 16 during the polishing process.

[0058] The stop block 11 is disposed on the rotating frame 3 and on the same side as the slide rail 4. For example, the stop block 11 can be disposed on the rotating frame 3 by screws. The stop block 11 is used to abut against the quick clamp 10 in the opposite direction when the quick clamp 10 moves along the length direction of the slide rail 4 to reach a preset distance between it and the fiber polishing machine 16.

[0059] Specifically, before grinding, when the ultra-fine choledochoscope 1 is fixed on the quick clamp 10, the bottom end of the ultra-fine choledochoscope 1 extends a certain length relative to the bottom end of the quick clamp 10. The length of the optical fiber at the tip of the ultra-fine choledochoscope 1 to be ground is less than or equal to this extended length. After the ultra-fine choledochoscope 1 is fixed by the quick clamp 10, under the action of the quick clamp 10's own weight, the bottom end of the optical fiber at the tip of the ultra-fine choledochoscope 1 can be pressed against the optical fiber grinder 16. At this time, the quick clamp 10 is a certain distance higher than the stop block 11 in the vertical direction. This distance is the grinding distance of the optical fiber at the tip of the ultra-fine choledochoscope 1. Grinding is then performed after installation. When the fiber optic polishing machine 16 is started, the bottom end of the fiber optic cable at the tip of the ultra-fine choledochoscope 1 is continuously polished, causing its length to gradually shorten. This causes the quick clamp 10 to slide vertically downward along the slide rail 4. When the slide rail 4 presses against the stop block 11, the stop block 11 pushes against the quick clamp 10 in the opposite direction. Due to the limiting effect of the stop block 11, the quick clamp 10 cannot continue to move downward. Therefore, the ultra-fine choledochoscope 1, which is fixed by the quick clamp 10, cannot continue to move downward. The fiber optic polishing machine 16 can only polish the fiber optic cable at the tip of the ultra-fine choledochoscope 1 to the set polishing distance (length), thereby achieving precise control of the polishing length.

[0060] The clamping assembly also includes a spring limiting block 5 and a spring 6.

[0061] The spring limiting block 5 is disposed on the top of the slide rail 4. For example, the spring limiting block 5 is installed on the top of the slide rail 4 by screws.

[0062] Spring 6 is positioned between spring limiting block 5 and quick clamp 10. Before grinding, after the ultra-fine cholangioscope 1 is fixed on quick clamp 10, spring 6 is in a compressed state. Since spring limiting block 5 is fixed on the top of slide rail 4, under the combined action of the elastic force of spring 6 and the weight of quick clamp 10, the end of the optical fiber at the tip of ultra-fine cholangioscope 1 can make closer contact with optical fiber grinder 16, thereby improving the grinding effect.

[0063] The quick clamp 10 is vertically provided with a spring guide post 13, which slides through the spring limiting block 5, and the spring 6 is sleeved on the spring guide post 13.

[0064] Specifically, the spring guide post 13 can be vertically installed on the top of the quick clamp 10. The spring limiting block 5 has a through hole (not shown in the figure). The spring guide post 13 slides through the through hole. The spring 6 is sleeved on the spring guide post 13 to prevent the spring 6 from bending when compressed or stretched, thereby improving the stability of the spring 6 during use.

[0065] The quick clamp 10 is equipped with a micrometer 12. When the quick clamp 10 moves along the slide rail 4 to reach a preset distance with the fiber polishing machine 16, the stop block 11 pushes against the micrometer 12 in the opposite direction.

[0066] Specifically, the micrometer 12 can be positioned on top of the quick clamp 10, with its measuring end extending through the top of the quick clamp 10. The micrometer 12 is positioned above the stop block 11. When the quick clamp 10 moves vertically downwards, it drives the micrometer 12 to move synchronously, causing the measuring end of the micrometer 12 to press against the stop block 11. Before grinding, the safe travel distance (i.e., the grinding distance of the optical fiber at the tip of the ultra-fine cholangioscope 1, specifically the distance between the measuring end of the micrometer 12 and the stop block 11) can be adjusted using the micrometer 12, thereby improving the grinding accuracy.

[0067] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A positioning device for grinding ultra-fine optical fibers at the end of a biliary tract lens, characterized in that, include: A base (2) is mounted on a fiber polishing machine (16); A rotating frame (3) is rotatably mounted on the base (2); A clamping assembly is provided on the rotating frame (3) for clamping and fixing the ultra-fine cholangioscope (1) and pressing the optical fiber at the tip of the ultra-fine cholangioscope (1) against the optical fiber polishing machine (16). A rotating rod (7) is rotatably mounted on the rotating frame (3). The rotating frame (3) rotates in the direction of a first direction on the base (2), and the rotating rod (7) rotates in the direction of a second direction on the rotating frame (3). The first direction and the second direction are opposite directions. Microscopic imaging element (9) is disposed on the rotating rod (7) and is used to acquire images of the optical fiber at the tip of the ultra-fine cholangioscope (1).

2. The positioning device for grinding ultra-fine optical fibers at the end of a biliary tract lens according to claim 1, characterized in that, The clamping assembly includes: The slide rail (4) is vertically arranged on one side of the rotating frame (3); Quick clamp (10), which is slidably disposed on the slide rail (4); A stop (11) is provided on the rotating frame (3) and on the same side as the slide rail (4). The stop (11) is used to abut against the quick clamp (10) in the opposite direction when the quick clamp (10) moves along the slide rail (4) to reach a preset distance from the fiber polishing machine (16).

3. The positioning device for grinding ultra-fine optical fibers at the end of a biliary tract lens according to claim 2, characterized in that, The clamping assembly further includes: A spring limiting block (5) is disposed on the top of the slide rail (4); A spring (6) is disposed between the spring limiting block (5) and the quick clamp (10).

4. A positioning device for grinding ultra-fine optical fibers at the end of a biliary tract lens according to claim 3, characterized in that, A spring guide post (13) is vertically arranged on the quick clamp (10). The spring guide post (13) slides through the spring limiting block (5). The spring (6) is sleeved on the spring guide post (13).

5. A positioning device for grinding ultra-fine optical fibers at the end of a biliary tract lens according to claim 2, characterized in that, The quick clamp (10) is equipped with a micrometer (12). When the quick clamp (10) moves along the slide rail (4) to a preset distance from the fiber polishing machine (16), the stop block (11) abuts against the micrometer (12) in the opposite direction.

6. A positioning device for grinding ultra-fine optical fibers at the end of a biliary tract lens according to claim 1, characterized in that, The maximum rotation angle of the rotating frame (3) on the base (2) is 90 degrees, and the maximum rotation angle of the rotating rod (7) on the rotating frame (3) is 90 degrees.

7. A positioning device for grinding ultra-fine biliary lens end optical fiber according to claim 1 or 6, wherein the rotating frame (3) is provided with a first extension (301) and a second extension (302), the first extension (301) and the second extension (302) are arranged perpendicularly, the first extension (301) is provided with a first pin (14), the rotating rod (7) is provided with a second pin (15), the first pin (14) is rotatably arranged on the base (2), and the second pin (15) is rotatably arranged on the second extension (302).

8. A positioning device for grinding ultra-fine optical fibers at the end of a biliary tract lens according to claim 1 or 6, characterized in that, The rotating frame (3) is on the base (2), and the rotating rod (7) is on the rotating frame (3) and locked by spring balls.

9. A positioning device for grinding ultra-fine optical fibers at the end of a biliary tract lens according to claim 1, characterized in that, The focal point of the microscopic imaging element (9) is the position of the optical fiber at the tip of the ultra-fine choledochoscope (1), and the length direction of the microscopic imaging element (9) is perpendicular to the length direction of the ultra-fine choledochoscope (1).

10. A positioning device for grinding ultra-fine optical fibers at the end of a biliary tract lens according to claim 1 or 9, characterized in that, The microscopic imaging device (9) is a video microscope head.

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