Optical fiber light guide electronic endoscope optical fiber threading tool and process

Abstract

The application provides a fiber guide electronic endoscope fiber threading tool and process, which comprises a base, an end piece supporting rod for supporting a front end piece of an endoscope, a module supporting frame for supporting a camera module of the endoscope and an outer frame, the end piece supporting rod and the module supporting frame are arranged on the upper surface of the base, and the two are arranged adjacently and a gap is left between the two; the outer frame is a hollow structure, which is arranged above the base, the top of the outer frame is provided with a through hole for placing the front end piece of the endoscope, the end piece supporting rod and the module supporting frame are located in the hollow part of the outer frame, and the top of the two is penetrated into the through hole, and a space for placing the front end piece of the endoscope is left above; the side wall of the outer frame is provided with a glue feeding hole, which is communicated with the through hole. The tool of the application can conveniently thread the fiber and form an insulation layer around the camera module and the LED group at the same time; the fiber is coated with a fiber, and the front end piece is plated with an insulation layer, so that the problem of not passing the high-voltage anti-static safety test can be effectively solved; the fiber threading method is simple, fast and efficient.

Description

Technical Field

[0001] This invention belongs to the field of fiber optic electronic endoscope technology, and specifically relates to a fiber optic fiber threading fixture and process for a fiber optic electronic endoscope. Background Technology

[0002] For products requiring bending, such as bronchoscopes, cystoscopes, and cholangioscopes, the connection to the bending wire is metal. The product must withstand tensile force (≥25N) during bending. The front-end component must be made of medical-grade stainless steel, unlike disposable electronic cystoscopes and nephroscopes which use plastic. This is because the front-end component involves welding the bending wire or other mechanical structures to it. Stainless steel front-end components present a problem: they fail high-voltage and anti-static safety tests. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the prior art, the present invention provides a fiber optic optical endoscope fiber threading fixture and process.

[0004] Technical solution: To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0005] In a first aspect, the present invention provides a fiber optic fiber threading fixture for an optical fiber-guided electronic endoscope, comprising a base, an end-piece support rod for supporting the endoscope's front end component, a module support frame for supporting the endoscope's camera module, and an outer frame. The end-piece support rod and the module support frame are disposed on the upper surface of the base, adjacent to each other with a gap between them. The outer frame is a hollow structure, disposed above the base, with a through hole at the top for placing the endoscope's front end component. The end-piece support rod and the module support frame are located in the hollow portion of the outer frame, and their tops both pass through the through hole, leaving space above for placing the endoscope's front end component. The side wall of the outer frame is provided with an adhesive application hole, which communicates with the through hole.

[0006] As an improvement, the tooling also includes a support member, which is disposed adjacent to the base.

[0007] As a preferred embodiment, the base is made of brass Hpb59-1 material and is not surface treated.

[0008] As a preferred embodiment, the end support rod is semi-cylindrical, and its supporting end has a concave spherical surface that mates with the front end member; furthermore, a length of the sag of the top of the end support rod is cut off from the circular cross-section direction, preferably 0.25-0.35mm; the end support rod is made of stainless steel 304 material.

[0009] As a preferred embodiment, the module support frame is cylindrical and made of brass Hpb59-1 material.

[0010] As a preferred embodiment, the height of the top surface of the module support frame is greater than the height of the lowest point of the top surface of the end support rod, preferably greater than 0.2mm ± 0.05mm.

[0011] As an improvement, the side wall of the outer frame is also provided with a hollow section, which is connected to the hollow part of the outer frame for observing the threading process; the outer frame is made of Hpb59-1 material.

[0012] As a preferred embodiment, the outer frame, except for the inner surface of the glue holes, the module support frame, except for the top surface, and the outer surface of the end support rods are all coated with a release agent; preferably, the release agent is selected from silicone oil.

[0013] As a preferred embodiment, the tooling further includes a sheet-laying tooling, which includes an upper support and a lower base plate. The bottom of the upper support is provided with a groove, and the upper support is disposed on the upper surface of the lower base plate. The two are fixedly connected.

[0014] Furthermore, the upper support and the lower base plate are fixedly connected by a pair of bolts.

[0015] Secondly, the present invention provides a method for threading optical fibers in a fiber-optic electronic endoscope using the aforementioned fixture, comprising the following steps:

[0016] 1) An endoscope front end piece is installed in the through hole of the outer frame, and removable glue is injected into the glue hole to fix the front end piece; the front end piece is plated with an insulating layer;

[0017] 2) Insert the camera module into the square hole in the front part and gently press it against the end of the module support frame;

[0018] 3) Take an optical fiber and insert it into the gap between the camera module and the front end piece from different positions in the square hole mentioned above, and apply adhesive to the optical fiber.

[0019] 4) After the adhesive has cured, first remove the module support frame, then clean the adhesive from the adhesive holes and remove the front part.

[0020] This method employs the following three solutions to address the issue of failing high-voltage anti-static and safety tests, based on the principle of insulation:

[0021] ① The cladding fiber filaments, such as 50-240 glass optical fibers with a diameter of 0.015-0.15mm and a divergence angle of 70-120°, are used;

[0022] ② The front end component is plated with an insulating layer.

[0023] ③ The camera module is covered with glass fiber optic wire and glue, and the braided metal wire is tightly connected to the front end. The braided metal wire grounding wire is led out at the handle, thereby forming an insulating layer around the camera module and LED assembly.

[0024] Preferably, in step 1), the insulating layer is an epoxy resin layer with a thickness of 20-50 μm.

[0025] Preferably, in step 2), the camera module cable is first laid flat on the support, and red paint is applied to the head end face of the camera module.

[0026] Preferably, in step 3), the optical fiber is a glass optical fiber with a diameter of 0.015-0.15 mm and a divergence angle of 70-120°; the adhesive applied to the optical fiber is selected from epoxy resin adhesive, preferably 3A adhesive.

[0027] Preferably, step 3) includes the following processing:

[0028] First, take a certain number of optical fibers, tie one end of them, and then clamp part of the optical fiber at the end that is not tied and is exposed. Insert the fiber into the gap between the camera module and the front end component, and then into the gap between the end component support rod and the module support frame. Repeat this process several times. Apply glue to the optical fiber, drag the optical fiber, apply the glue multiple times, and repeat the above steps several times.

[0029] Repeat the above steps, except that the number of optical fibers is different. Insert the optical fibers into the other gaps between the camera module and the front-end component.

[0030] In a further preferred embodiment, 40 to 43 optical fibers are first taken and, using a support member as support, are inserted into the gap between the end member support rod and the module support frame in stages; then, the optical fibers are inserted into other gaps between the camera module and the front-end member, with the fibers being inserted at 3 different locations, and the number of optical fibers each time being greater than 76.

[0031] Preferably, in step 4), after the front end part is removed, the rear cylinder connected to the front end part can be welded first, or the front end part can be directly wrapped with raw material and placed in a stainless steel drill chuck for cutting, rough and fine grinding until polishing, and finally fine polishing.

[0032] Furthermore, the process before threading includes arranging the sheets, which comprises the following steps:

[0033] 1) Use a panel mounting fixture. PTFE sheets are attached to both the upper support and the lower base plate. A certain number of optical fibers are placed in the gap formed by the groove, one end is tied, and the fiber is placed on the support.

[0034] 2) Insert a steel sheet between the upper support and the lower base plate, take a certain number of optical fiber wires, and repeat the above steps.

[0035] Preferably, in step 1), the certain quantity of optical fiber filaments is 40 to 43 optical fiber filaments; in step 2), for the 0.7×0.12mm gap, a 0.12mm steel sheet is embedded between the upper support and the lower base plate, and the length is controlled to be 0.7mm; the certain quantity of optical fiber filaments is taken in quantities greater than 76 optical fiber filaments.

[0036] Beneficial effects: The tooling of this invention, through the design of end-piece support rods and module support frames, works in conjunction with the front-end component and camera module, facilitating fiber threading while simultaneously forming an insulating layer around the camera module and LED assembly. The external frame not only secures the front-end component and camera module but also allows for convenient glue application through the glue application holes. Furthermore, the use of fiber optic cable sheathing and the front-end component's insulating layer effectively solves the problem of failing high-voltage and anti-static tests (i.e., safety regulations). Using this tooling for fiber threading is simple, quick, and highly efficient. In addition, the fiber threading tooling can also improve the speed of the optical fiber production process, streamlining and standardizing the operation. Attached Figure Description

[0037] Figure 1 This is a schematic diagram (three-dimensional view) of the tooling of the present invention, wherein:

[0038] 1-Base, 2-End support rod, 4-Outer frame, 41-Through hole, 42-Glue hole, 43-Hollow part, 5-Supporting component, 7-Front end component, 9-Fiber optic cable.

[0039] Figure 2 This is a structural schematic diagram (sectional view) of the tooling of the present invention, wherein:

[0040] 1-Base, 2-End support rod, 3-Module support frame, 4-Outer frame, 41-Through hole, 42-Glue hole, 43-Hollow part, 5-Supporting component, 7-Front end component, 8-Camera module, 9-Fiber optic cable, 10-Camera module cable.

[0041] Figure 3 This is a schematic diagram (top view) of the tooling of the present invention;

[0042] Figure 4 This is a schematic diagram of the structure of the sheet-laying fixture of the present invention, wherein: 6-sheet-laying fixture, 61-upper support, 62-lower base plate, 63-bolt.

[0043] Figure 5 This is a diagram showing the wire threading position (bottom view), where: 7-front end component, 8-camera module.

[0044] Figure 6 This is a diagram illustrating the film arrangement.

[0045] Figure 7 This is the scheduling process. Detailed Implementation

[0046] The invention will now be further described with reference to the accompanying drawings.

[0047] In the description of this invention, it should be understood that if terms such as "upper," "lower," "left," "right," "top," "bottom," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent.

[0048] Example 1

[0049] A fiber optic optical endoscope fiber threading fixture, such as Figure 1 , Figure 2 and Figure 3 As shown, the system includes a base 1, an end-piece support rod 2 for supporting the endoscope's front end piece, a module support frame 3 for supporting the endoscope camera module, an outer frame 4, and a support member 5. The end-piece support rod 2 and the module support frame 3 are disposed on the upper surface of the base 1, adjacent to each other with a gap between them. The outer frame 4 is a hollow structure, disposed above the base 1. The top of the outer frame 4 has a through hole 41 for placing the endoscope's front end piece. The end-piece support rod 2 and the module support frame 3 are located in the hollow part of the outer frame 4, and their tops both pass through the through hole 41, leaving space above for placing the endoscope's front end piece. The side wall of the outer frame 4 has an adhesive application hole 42, which communicates with the through hole 41. The support member 5 is disposed adjacent to the base 1.

[0050] The base 1 is made of brass Hpb59-1 material and is not surface treated.

[0051] The end support rod 2 is semi-cylindrical, and its supporting end has a concave spherical surface that mates with the front end member; furthermore, in order to facilitate the threading of the innermost optical fiber without interference, a length of sag is cut off from the top of the end support rod 2 from the direction of the circular cross section, preferably 0.25-0.35mm; the end support rod 2 is made of stainless steel 304 material.

[0052] The module support frame 3 is cylindrical and made of brass Hpb59-1 material.

[0053] The height of the top surface of the module support frame 3 is greater than the height of the lowest point of the top surface of the end support rod 2. In this embodiment, the height of the top surface of the module support frame 3 is 0.2mm greater than the height of the lowest point of the top surface of the end support rod 2.

[0054] The side wall of the outer frame 4 is also provided with a hollow part 43 (the milled part is limited to a height difference of 5mm). The hollow part 43 is connected to the hollow part of the outer frame 4 and is used to observe the wire threading. It can be hollowed out to the point where the end support rod 2 can be observed. The outer frame 4 is made of Hpb59-1 material.

[0055] The outer frame 4, except for the inner surface of the glue hole 42, the module support frame 3, except for the top surface, and the outer surface of the end support rod 2 are all coated with silicone oil release agent.

[0056] like Figure 4 As shown, the tooling of the present invention also includes a sheet arrangement tooling 6, which includes an upper support 61 and a lower base plate 62. The bottom of the upper support 61 is provided with a groove 611, and the upper support 61 is disposed on the upper surface of the lower base plate 62. The two are fixedly connected by a pair of bolts 63.

[0057] Notes: ① During design, pay attention to the fit tolerance between holes and corresponding shafts, the concentricity and positional tolerance between holes, and the positional tolerance between end-piece support rods and module support frames; ② The selected removable adhesive should be soluble in alcohol or acetone, such as 502 glue which is soluble in acetone. The choice of adhesive is not limited to the example; ③ The height of the top surface of the module support frame 3 should be 0.2mm greater than the height of the lowest point of the top surface of the end-piece support rod 2. This dimension should be ensured to ensure that the module is recessed inside the end-piece to prevent damage to the module during polishing of the optical fiber. The damaged part should be removed after polishing; ④ The height of the base should be high enough to ensure that the operator sitting on the stool can look at the milled area of ​​the outer frame at eye level, that is, can look at the protruding optical fiber at eye level.

[0058] Example 2

[0059] The fiber optic threading process using the fiber optic optical guide electronic endoscope fiber optic threading fixture of Example 1 mainly adopts three solutions, the principle of which is insulation:

[0060] ① The cladding fiber filaments, such as 50-240 glass optical fibers with a diameter of 0.015-0.15mm and a divergence angle of 70-120°, are used;

[0061] ②The front-end component is plated with an insulating layer and an epoxy resin layer, with a thickness of 20-50um.

[0062] ③ The camera module is covered with glass fiber optic wire and glue, and the braided metal wire is tightly connected to the front end. The braided metal wire grounding wire is led out at the handle, thereby forming an insulating layer around the camera module and LED assembly.

[0063] The specific process is as follows:

[0064] 1. Threading process

[0065] (1) The outer frame, except for the inner surface of the glue holes, the module support frame, except for the top surface, and the outer surface of the end support rods are all coated with a release agent (preferably silicone oil).

[0066] (2) Assemble the outer frame and module support frame and place them on the base.

[0067] (3) Insert the front end piece into the glue hole of the outer frame and inject detachable glue into the glue hole to fix the front end piece.

[0068] (4) The camera module cable is laid flat on the support above the workbench. Red paint is applied to the head end of the camera module. The camera module is gently inserted into the square hole in the front end with bamboo tweezers and pressed lightly until it reaches the end of the module support frame.

[0069] (5) The operator should use medical alcohol to degrease their hands or wear surgical gloves. First, count 40-43 fiber optic strands and insert them into a black plastic tube. Tie at least five rolls of cotton thread around one end of the plastic tube to ensure the fiber optic strands do not move. Several sections can be tied, preferably with slip knots for easy disassembly. Then, place this tube on the support above the workbench. At the end where the fiber optic strands are exposed, hold about 10 fiber optic strands between your fingers, moisten them with medical alcohol, and insert them through the gap between the camera module and the front-end component into the gap between the end-end component support rod 2 and the module support frame 3 (e.g., ...). Figure 5 As shown in position A), thread the fiber in four stages, pushing the fiber as far as possible to the bottom (exposing about 5mm). Dry the fiber with medical alcohol using a hairdryer. Prepare epoxy resin adhesive (preferably 3A adhesive). Apply the adhesive to the fiber from top to bottom multiple times using a fine toothpick. Then, drag the fiber upwards by hand for about 1.5mm before threading it downwards. Repeat the above steps three times, applying the adhesive from top to bottom with a fine toothpick or by removing excess adhesive from the fiber. Finally, gently wipe away any excess adhesive from the fiber using a clean, fine toothpick wrapped with cotton wool.

[0070] (6) Repeat (5), the difference being that there are more than 76 optical fibers in the second step. The optical fibers are then threaded into other gaps between the camera module and the front-end component (the two sides of the gap between the end-end support rod 2 and the module support frame 3, such as...). Figure 5 (As shown in positions B and C).

[0071] (7) Repeat (5), inserting the optical fiber into the gap between the camera module and the front-end component (the opposite side of the gap between the end component support rod 2 and the module support frame 3, such as...). Figure 5 (As shown in position D).

[0072] (8) After the adhesive has cured for 24 hours, first remove the module support frame, then clean the adhesive from the glue application hole and remove the front end part;

[0073] (9) The front end can be welded to the rear cylinder first, or the front end can be wrapped with raw material and placed in a stainless steel drill chuck for cutting, rough and fine grinding until polishing. When red paint is found, it is finely polished.

[0074] 2. Before threading the yarn, the yarn must be arranged in a specific pattern. The arrangement process is as follows:

[0075] Figure 6 For the layout diagram, the upper support 61 and the lower base plate 62 are made of 304 stainless steel with a thickness of 8mm (at least 5mm) and a width of 5mm. The upper cover plate is processed into... Figure 5 The required R is 0.7 + the thickness of the PTFE sheet. The PTFE sheet should be glued to the upper support on one side for easy demolding. The lower base plate is also attached with a PTFE sheet. Place 40-43 optical fibers in the gaps and insert the optical fibers into the black plastic tube. Tie at least five rolls of cotton thread around one end of the plastic tube to ensure that the optical fibers do not move. You can tie several sections, preferably with slip knots for easy disassembly. Then place this on the support above the workbench.

[0076] For a 0.7×0.12 gap, a 0.12mm steel sheet is embedded between the upper and lower cover plates, with a length controlled at 0.7mm, and more than 76 optical fiber filaments are used. Repeat the above steps.

[0077] The operation process is as follows Figure 7 As shown:

[0078] ① Prepare the 5-minute adhesive by mixing A:B = 1:1. After mixing evenly, apply the adhesive to the optical fiber close to the edge of the tablet mold (pull it out 10mm first). Wearing medical finger cots, gently squeeze the optical fiber coated with the 5-minute adhesive to adjust the tablet thickness to be consistent.

[0079] ② Heat the fiber optic sheet slightly with a hair dryer. After curing, use transparent tape to stick the fiber optic sheet with 5 minutes of adhesive on it along the unfolded length. Mark the tape at both ends of the fiber optic sheet with a marker.

[0080] ③ Pull the fiber optic sheet out of the pressing mold by more than 5mm, and further tighten the screws at both ends of the pressing mold.

[0081] ④ After preparing the 3A adhesive, apply it to the area 5mm behind the transparent tape and allow the adhesive to penetrate the fibers evenly.

[0082] ⑤ After the fiber optic sheet is shaped, loosen the screws at both ends of the pressing mold and remove the fiber optic sheet.

[0083] ⑥ Gently hold the fiber optic sheet and connect the two sides that are close to the lines marked with the pen.

[0084] ⑦ Lay the camera module cable flat on the support above the workbench. Apply red paint to the head end of the camera module. Gently insert the camera module into the square hole in the front end with bamboo tweezers, ensuring that the camera module is 0.2mm away from the front end.

[0085] ⑧ Cut along the marked line with scissors, insert them into the gap between the camera module and the front end, and push them out 2mm to expose the front end. Apply 3A glue, pull it into the front end 1.5mm, and then pull it out 2mm with bamboo tweezers. Repeat the above steps three times. After curing, proceed to the polishing process. Note that you should prevent the camera module and the optical fiber from moving within 1 hour.

[0086] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fiber optic fiber threading fixture for a fiber optic electronic endoscope, characterized in that, The device includes a base (1), an end support rod (2) for supporting the endoscope front end piece, a module support frame (3) for supporting the endoscope camera module, and an outer frame (4). The end support rod (2) and the module support frame (3) are set on the upper surface of the base (1), adjacent to each other with a gap between them. The outer frame (4) is a hollow structure and is set above the base (1). The top of the outer frame (4) is provided with a through hole (41) for placing the endoscope front end piece. The end support rod (2) and the module support frame (3) are located in the hollow part of the outer frame (4), and their tops are inserted into the through hole (41), leaving space above for placing the endoscope front end piece. The side wall of the outer frame (4) is provided with an adhesive hole (42), which communicates with the through hole (41).

2. The fiber optic fiber threading fixture for an electronic endoscope according to claim 1, characterized in that, The tooling also includes a support (5), which is arranged adjacent to the base (1).

3. The fiber optic fiber threading fixture for an electronic endoscope according to claim 1, characterized in that, The base (1) is made of brass Hpb59-1 material and is not surface treated; The end support rod (2) is semi-cylindrical, and its supporting end has a concave spherical surface that mates with the front end piece; the top of the end support rod (2) has a length of sag cut off from the circular cross section direction; the end support rod (2) is made of stainless steel 304 material. The module support frame (3) is cylindrical and made of brass Hpb59-1 material.

4. The fiber optic fiber threading fixture for an electronic endoscope according to claim 3, characterized in that, The sagittal height is 0.25-0.35 mm.

5. The fiber optic fiber threading fixture for an electronic endoscope according to claim 1, characterized in that, The height of the top surface of the module support frame (3) is greater than the height of the lowest point of the top surface of the end support rod (2).

6. The fiber optic fiber threading fixture for an electronic endoscope according to claim 5, characterized in that, The height of the top surface of the module support frame (3) is 0.2 mm ± 0.05 mm greater than the height of the lowest point of the top surface of the end support rod (2).

7. The fiber optic fiber threading fixture for an electronic endoscope according to claim 1, characterized in that, The side wall of the outer frame (4) is also provided with a hollow part (43), which is connected to the hollow part of the outer frame (4) for observing the threading situation; the outer frame (4) is made of Hpb59-1 material.

8. The fiber optic fiber threading fixture for an electronic endoscope according to claim 1, characterized in that, The outer frame (4) except for the inner surface of the glue hole (42), the module support frame (3) except for the top surface, and the outer surface of the end support rod (2) are all coated with release agent.

9. The fiber optic fiber threading fixture for an electronic endoscope according to claim 8, characterized in that, The release agent is selected from silicone oil.

10. The fiber optic fiber threading fixture for an electronic endoscope according to claim 1, characterized in that, The tooling also includes a sheet arrangement tooling (6), which includes an upper support (61) and a lower base plate (62). The bottom of the upper support (61) is provided with a groove (611), and the upper support (61) is disposed on the upper surface of the lower base plate (62). The two are fixedly connected.

11. The fiber optic fiber threading fixture for an electronic endoscope according to claim 10, characterized in that, The upper support (61) and the lower base plate (62) are fixedly connected by a pair of bolts (63).

12. A method for threading optical fibers for a fiber-optic electronic endoscope using the fixture described in any one of claims 1-11, characterized in that, Includes the following steps: 1) An endoscope front end piece is installed in the through hole (41) of the outer frame (4), and removable glue is injected into the glue hole (42) to fix the front end piece; the front end piece is plated with an insulating layer; 2) Insert the camera module into the square hole in the front part and gently press it against the end of the module support frame (3); 3) Take an optical fiber and insert it into the gap between the camera module and the front end piece from different positions in the square hole mentioned above, and apply adhesive to the optical fiber. 4) After the adhesive has cured, first remove the module support frame (3), then clean the adhesive in the adhesive hole (42) and remove the front part.

13. The method according to claim 12, characterized in that, In step 1), the insulating layer is an epoxy resin layer with a thickness of 20-50um; in step 2), the camera module cable is first laid flat on the support (5), and red paint is applied to the head end face of the camera module.

14. The method according to claim 12, characterized in that, In step 3), the optical fiber is a glass optical fiber with a diameter of 0.015-0.15 mm and a divergence angle of 70-120°; the optical fiber is coated with an adhesive, which is selected from epoxy resin adhesive.

15. The method according to claim 14, characterized in that, The adhesive is selected from 3A adhesive.

16. The method according to claim 12, characterized in that, Step 3) includes the following processing: First, take a certain number of optical fibers, tie one end, and then clamp part of the optical fiber at the end that is not tied and is exposed. Insert the fiber into the gap between the end support rod (2) and the module support frame (3) through the gap between the camera module and the front end. Repeat this process several times. Apply adhesive to the optical fiber, drag the optical fiber, apply the adhesive multiple times, and repeat the above steps several times. Repeat the above steps, except that the number of optical fibers is different. Insert the optical fibers into the other gaps between the camera module and the front-end component.

17. The method according to claim 16, characterized in that, First, take 40 to 43 optical fibers, use the support member (5) as support, and insert them into the gap between the end member support rod (2) and the module support frame (3) in batches; Then the optical fibers are threaded into the other gaps between the camera module and the front-end components. The fibers are threaded at three different locations, with more than 76 optical fibers each time.

18. The method according to claim 12, characterized in that, In step 4), after the front end part is removed, the rear cylinder connected to the front end part is welded first, or the front end part is directly wrapped with raw material and placed in a stainless steel drill chuck for cutting, rough and fine grinding until polishing, and finally fine polishing.

19. The method according to claim 12, characterized in that, Before threading the yarn, the process also includes arranging the sheets, which involves the following steps: 1) Using a sheet-laying fixture (6), PTFE sheets are attached to both the upper support (61) and the lower base plate (62). A certain number of optical fibers are placed in the gap formed by the groove (611), one end is tied, and this is placed on the support (5). 2) Insert a steel sheet between the upper support (61) and the lower base plate (62), take a certain number of optical fiber wires, and repeat the above steps.

20. The method according to claim 19, characterized in that, In step 1), the certain number of optical fiber filaments is 40 to 43 optical fiber filaments; in step 2), for a gap of 0.7 × 0.12 mm, a 0.12 mm steel sheet is embedded between the upper support (61) and the lower base plate (62), and the length is controlled to be 0.7 mm; taking a certain number of optical fiber filaments means taking more than 76 optical fiber filaments.

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