Mold structure for manufacturing special-shaped end face of multi-core optical fiber

Abstract

The utility model relates to the technical field of optical fiber manufacturing, and discloses a mold structure for manufacturing a special-shaped end face of a multi-core optical fiber, which is characterized in that a tube positioning support plate and a tube core positioning support plate are arranged in parallel, a sleeve positioning support plate is provided with a positioning hole, and one end of a sleeve penetrates through the sleeve positioning support plate through the positioning hole and is arranged towards the tube core positioning support plate; a mounting groove is formed in the pipe core positioning support plate, one end of the pipe core is assembled on the mounting groove, the other end of the pipe core is inserted into the sleeve, a gap is formed between the outer wall of the pipe core and the inner wall of the sleeve, a special-shaped hole is formed in the gap, and the special-shaped hole is formed between the sleeve and the pipe core through superposition of the sleeve and the pipe core. The die has the advantages that the structure is simple, the cost is low, and the manufacturing efficiency of the special-shaped end surface of the multi-core optical fiber is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of optical fiber manufacturing, in particular to a mold structure for manufacturing special-shaped end faces of multi-core optical fibers. Background Art

[0002] The lighting source is one of the cores of the electronic endoscope. It is mainly composed of a light source system and a light-guiding optical fiber. Its main function is to provide auxiliary lighting for the cavity. There are two ways to install the lighting source: front installation and rear installation. The front installation uses micro LED lamp beads, which are installed side by side with the lens. The front of the endoscope is a fine aperture, and the space position is very small. The lighting source can only use micro LEDs. There is no additional space to design a heat dissipation system for the light source, making it difficult to solve the heat dissipation problem, resulting in low light source power and limited overall lighting brightness. For the installation of the rear lighting source, the lighting light needs to be guided into the end face of the lens with the help of a light-guiding optical fiber. For the installation of the rear lighting source such as optical fiber light guide, the spatial volume of the lighting source is not limited, and there is enough space to design a heat dissipation system for the light source. The light source power is not limited by the heat dissipation problem, and the power of the LED light source can be increased to increase the lighting brightness. The biggest advantage of LED is that it is easy to assemble and has low power consumption, while the biggest advantage of optical fiber is that it does not generate heat at the head end and occupies less space at the head end. Because optical fiber only transmits light and does not generate heat itself, and multi-core optical fiber is composed of several optical fiber filaments with a diameter of 25-50um, special-shaped holes can be designed according to different head ends to adapt to various imaging devices and size requirements. The current process for making special-shaped end faces of multi-core optical fibers is costly and the mold is complex. Therefore, a mold for making special-shaped end faces of multi-core optical fibers with reduced production costs and simple structure is needed. Utility Model Content

[0003] In order to overcome the defects of the above-mentioned prior art, the purpose of the utility model is to provide a mold structure for making special-shaped end faces of multi-core optical fibers, so as to solve the technical problems of complex and high cost of making molds for special-shaped end faces of multi-core optical fibers in the prior art.

[0004] The utility model is realized by the following technical solutions:

[0005] A mold structure for making a special-shaped end face of a multi-core optical fiber, comprising a sleeve positioning support plate, a tube core positioning support plate, a sleeve and a tube core; the sleeve positioning support plate and the tube core positioning support plate are arranged side by side, the sleeve positioning support plate is provided with a positioning hole, one end of the sleeve passes through the sleeve positioning support plate through the positioning hole and is arranged toward the tube core positioning support plate, the tube core positioning support plate is provided with a mounting groove, one end of the tube core is assembled on the mounting groove, and the other end is inserted into the sleeve, a gap is formed between the outer wall of the tube core and the inner wall of the sleeve, and a special-shaped hole is formed in the gap, the multi-core optical fiber is inserted into the special-shaped hole through the other end of the sleeve, which is used to fill the gap and form a special-shaped light guiding channel.

[0006] Preferably, the position of the positioning hole on the sleeve positioning support plate corresponds to the position of the mounting groove on the tube core positioning support plate.

[0007] Preferably, the centerline of the sleeve is parallel to the centerline of the tube core.

[0008] Preferably, the plate surface of the positioning hole provided on the sleeve positioning support plate is parallel to the plate surface of the mounting groove provided on the tube core positioning support plate.

[0009] Preferably, the sleeve positioning support plate is provided with a groove from the position of the positioning hole to the side wall of the plate surface for applying pressure to the sleeve.

[0010] Furthermore, a threaded hole is provided at a position near the slot on the top of the casing positioning support plate, and the threaded hole extends to the slot on the casing positioning support plate, and a bolt is threadedly connected in the threaded hole.

[0011] Furthermore, the direction of the bolt in the threaded hole is arranged perpendicular to the sleeve.

[0012] Preferably, the bottoms of the sleeve positioning support plate and the tube core positioning support plate are respectively mounted on the multi-dimensional adjustment device for adjusting the position between the sleeve positioning support plate and the tube core positioning support plate.

[0013] Preferably, the structures of the special-shaped holes include rectangular structures, circular structures and crescent-shaped structures.

[0014] Preferably, the multi-core optical fiber is located between the sleeve and the core in the special-shaped hole.

[0015] Compared with the prior art, the utility model has the following beneficial technical effects:

[0016] The utility model provides a mold structure for making special-shaped end faces of multi-core optical fibers. The structure comprises a tube positioning support plate and a tube core positioning support plate arranged in parallel, and a positioning hole is provided on the sleeve positioning support plate. One end of the sleeve passes through the sleeve positioning support plate through the positioning hole and is arranged toward the tube core positioning support plate. An installation groove is provided on the tube core positioning support plate. One end of the tube core is assembled on the installation groove and the other end is inserted into the sleeve. A gap is provided between the outer wall of the tube core and the inner wall of the sleeve, and a special-shaped hole is formed in the gap. A special-shaped hole is formed between the sleeve and the tube core by superposition between the sleeve and the tube core. Multi-core optical fibers can be inserted into the special-shaped hole to obtain special-shaped end faces. The mold structure is simple and the cost is low, which improves the production efficiency of special-shaped end faces of multi-core optical fibers.

[0017] Furthermore, the position of the positioning hole on the sleeve positioning support plate corresponds to the position of the mounting groove on the tube core positioning support plate, so that the sleeve and the tube core can penetrate to form a special-shaped hole.

[0018] Furthermore, the center line of the sleeve is parallel to the center line of the tube core, so that the sleeve and the tube core can penetrate to form a special-shaped hole.

[0019] Furthermore, the sleeve positioning support plate is provided with a groove from the position of the positioning hole to the side wall of the plate surface, which is used to apply pressure to the sleeve, thereby increasing the stability of the sleeve assembly in the positioning hole.

[0020] Furthermore, a threaded hole is provided at the top of the casing positioning support plate near the slot, and the threaded hole extends to the slot on the casing positioning support plate. The threaded bolt is connected to the thread in the threaded hole, and the bolt extends from the threaded hole to the slot to provide pressure to the casing.

[0021] Furthermore, the bottoms of the sleeve positioning support plate and the tube core positioning support plate are respectively mounted on multi-dimensional adjustment devices for adjusting the position between the sleeve positioning support plate and the tube core positioning support plate, so that the special-shaped holes between the sleeve and the tube core can be changed by adjusting the position between the sleeve positioning support plate and the tube core positioning support plate by the multi-dimensional adjustment device, thereby increasing the diversity of the special-shaped holes. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the mold structure in the utility model;

[0023] Figure 2 This is a schematic diagram of the square structure of the end face of the special-shaped hole in the middle end of the utility model;

[0024] Figure 3 This is a schematic diagram of the circular structure of the end face of the special-shaped hole at the end of the utility model;

[0025] Figure 4 This is a schematic diagram of the crescent-shaped structure of the end face of the special-shaped hole at the end of the utility model;

[0026] In the figure: 1- casing positioning support plate; 2- tube core positioning support plate; 3- casing; 4- tube core; 5- special-shaped hole; 6- multi-core optical fiber; 7- positioning hole; 8- multi-dimensional adjustment device; 9- bolt; 10- slot. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0028] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, products or devices.

[0029] The utility model is further described in detail below with reference to the accompanying drawings:

[0030] The utility model aims to provide a mold structure for manufacturing a special-shaped end face of a multi-core optical fiber, so as to solve the technical problems of complexity and high cost of the mold for manufacturing the special-shaped end face of the multi-core optical fiber in the prior art.

[0031] See also Figure 1 In one embodiment of the utility model, a mold structure for making a special-shaped end face of a multi-core optical fiber is provided, including a sleeve positioning support plate 1, a tube core positioning support plate 2, a sleeve 3 and a tube core 4; the sleeve positioning support plate 1 and the tube core positioning support plate 2 are arranged side by side, and a positioning hole 7 is provided on the sleeve positioning support plate 1, one end of the sleeve 3 passes through the sleeve positioning support plate 1 through the positioning hole 7, and is arranged toward the tube core positioning support plate 2, and a mounting groove is provided on the tube core positioning support plate 2, one end of the tube core 4 is assembled on the mounting groove, and the other end is inserted into the sleeve 3, a gap is formed between the outer wall of the tube core 4 and the inner wall of the sleeve 3, and a special-shaped hole 5 is formed in the gap, and the multi-core optical fiber 6 is inserted into the special-shaped hole 5 through the other end of the sleeve 3 to fill the gap and form a special-shaped light guiding channel.

[0032] Specifically, the position of the positioning hole 7 on the sleeve positioning support plate 1 corresponds to the position of the mounting groove on the tube core positioning support plate 2, the center line of the sleeve 3 is parallel to the center line of the tube core 4, the plate surface of the positioning hole 7 set on the sleeve positioning support plate 1 is parallel to the plate surface of the mounting groove set on the tube core positioning support plate 2, so that a special-shaped hole can be formed between the sleeve and the tube core.

[0033] Specifically, the sleeve positioning support plate 1 is provided with a groove 9 from the position of the positioning hole 7 to the side wall of the plate surface, which is used to apply pressure to the sleeve 3, thereby increasing the stability of the sleeve assembly in the positioning hole.

[0034] A threaded hole is provided at the top of the casing positioning support plate 1 near the slot 9 , and the threaded hole extends on the casing positioning support plate 1 to the slot 9 , and a bolt 10 is threadedly connected in the threaded hole.

[0035] The bolt 10 is arranged in a direction perpendicular to the sleeve 3 in the threaded hole.

[0036] Specifically, the bottoms of the sleeve positioning support plate 1 and the tube core positioning support plate 2 are respectively assembled on the multi-dimensional adjustment device 8, which is used to adjust the position between the sleeve positioning support plate 1 and the tube core positioning support plate 2, so that the special-shaped holes between the sleeve and the tube core can be changed by adjusting the position between the sleeve positioning support plate and the tube core positioning support plate through the multi-dimensional adjustment device, thereby increasing the diversity of the special-shaped holes.

[0037] The cross-sectional structure of the tube core 4 in the present invention can be a circular structure or a rectangular structure, such as Figure 2 , Figure 3 and Figure 4 shown.

[0038] The utility model provides a mold structure for making a multi-core optical fiber special-shaped end face. The specific process of making the multi-core optical fiber special-shaped end face is as follows:

[0039] (1) Insert the sleeve 3 horizontally into the positioning hole 7 of the sleeve positioning support plate 1 to facilitate the insertion of the tube core 4;

[0040] (2) Select a tube core 4 with a desired special-shaped end face shape, install one end of the tube core positioning support plate 2, and install the other end of the tube core positioning support plate 1 into the positioning hole 7 of the casing positioning support plate 1, and then place the tube core 3 horizontally. Use the casing positioning support plate 1 and the multi-dimensional adjustment device 8 below the tube core positioning support plate 2 to adjust the required special-shaped hole 5;

[0041] (3) Inserting optical fibers into the special-shaped holes 5, controlling the density of the optical fibers to form a dense multi-core optical fiber 6, and ensuring that the other end of the optical fibers inserted into the special-shaped holes 5 are exposed from the special-shaped holes;

[0042] (4) Use a glue dispensing needle to dispense glue on the optical fiber that is exposed at the other end of the special-shaped hole 5, so that the glue can penetrate into the multi-core optical fiber by the capillary principle. At this time, the length of the multi-core optical fiber immersed in the glue needs to be controlled within the length range of the sleeve, and then the glue in the multi-core optical fiber is cured according to the corresponding TDS requirements;

[0043] (5) While keeping the relative positions of the sleeve 3 and the tube core 4 unchanged, remove the sleeve 3 and the tube core 4 from their respective support plates;

[0044] (6) Grinding and polishing the removed sleeve 3, tube core 4 and multi-core optical fiber 6;

[0045] (7) Cleaning the multi-core optical fiber: After grinding, the multi-core optical fiber is placed in an alcohol solution for ultrasonic cleaning to remove the grinding powder, polishing liquid and other contaminants on the surface of the multi-core optical fiber, and then inserted into the 400X end face inspection equipment to detect whether there are defects on the end face of the multi-core optical fiber;

[0046] The cleaning process is as follows:

[0047] The frequency of ultrasonic vibration cleaning of the ground and polished end multi-core optical fiber is 80-120KHz, the cleaning time is 10-15 minutes, and the cleaning is repeated at least 3 times. Then use a high-pressure air gun to remove surface water stains and bake in an oven at 50-60℃ for 2-3 hours.

[0048] (8) Since the sleeve and the core are made of a special material, polytetrafluoroethylene, the multi-core optical fiber can be separated from the sleeve and the core;

[0049] (9) Fabricate the other end of the multi-core optical fiber according to steps (1) to (8).

[0050] Among them, the grinding and polishing process is as follows:

[0051] a. Debonding: During grinding, the speed is 60r / min, the time is 30s, the pressure is 2N, the Shore hardness of the grinding pad is 100°, and the material of the grinding sheet is 15um diamond. Debonding and grinding are performed on the special-shaped end faces of multi-core optical fibers;

[0052] b. Rough grinding: During grinding, the speed is 60r / min, the time is 60s, the pressure is 2N, the Shore hardness of the grinding pad is 100°, the material of the grinding sheet is 9um diamond, and cerium oxide polishing liquid is added to rough grind the special-shaped end face of the multi-core optical fiber;

[0053] c. Fine grinding: During grinding, the speed is 100r / min, the time is 80s, the pressure is 4N, the Shore hardness of the grinding pad is 100°, the grinding sheet is made of 3um diamond, and cerium oxide polishing liquid is added to finely grind the special-shaped end faces of multi-core optical fibers;

[0054] d. Fine grinding: During grinding, the speed is 100r / min, the time is 80s, the pressure is 6N, the Shore hardness of the grinding pad is 100°, the grinding sheet is made of 1um diamond, and cerium oxide polishing liquid is added to finely grind the special-shaped end faces of multi-core optical fibers;

[0055] e. Polishing: During polishing, the speed is 100r / min, the time is 80s, the pressure is 6N, the Shore hardness of the polishing pad is 100°, the polishing sheet is made of 0.01um silica, and cerium oxide polishing liquid is added to polish the special-shaped end faces of multi-core optical fibers.

[0056] As shown in the grinding process table in Table 1:

[0057] Table 1 Grinding process table

[0058]

[0059] The multi-core optical fiber grinding and polishing process can ensure that the multi-core optical fiber has no end face scratches and defects when detected under a 400X microscope. It also reduces the optical fiber end face loss, improves the light guiding efficiency and thus optimizes the light spot output quality.

[0060] In the utility model, the material of the sleeve 3 and the tube core 4 is polytetrafluoroethylene, so that the inner wall of the special-shaped hole, that is, the inner wall of the sleeve and the outer wall of the tube core, will not be adhered to the glue, and demoulding is easy.

[0061] In summary, the utility model provides a mold structure for making special-shaped end faces of multi-core optical fibers, through the parallel arrangement of the tube positioning support plate and the tube core positioning support plate, and a positioning hole is provided on the sleeve positioning support plate, one end of the sleeve passes through the sleeve positioning support plate through the positioning hole, and is arranged toward the tube core positioning support plate, and an installation groove is provided on the tube core positioning support plate, one end of the tube core is assembled on the installation groove, and the other end is inserted into the sleeve, a gap is set between the outer wall of the tube core and the inner wall of the sleeve, and a special-shaped hole is formed in the gap, and a special-shaped hole is formed between the sleeve and the tube core by superposition between the sleeve and the tube core, and the multi-core optical fiber can be inserted into the special-shaped hole to obtain a special-shaped end face. The mold structure is simple and low in cost, and the production efficiency of the special-shaped end faces of the multi-core optical fibers is improved. Compared with the direct fiber threading method, it can ensure that the special-shaped end face multi-core optical fiber device has a higher optical fiber filling capacity, reduces the disadvantage of voids caused by fiber threading, and effectively optimizes the output quality of the special-shaped light spot. The corresponding core mold is designed using special materials that are not sticky to glue, and can be designed and combined according to the required special-shaped shapes to obtain the required multi-core optical fiber with special-shaped end faces.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the utility model can still be modified or replaced by equivalents, and any modification or equivalent replacement that does not depart from the spirit and scope of the utility model should be included in the scope of protection of the claims of the utility model.

Claims

1. A mold structure for making a special-shaped end face of a multi-core optical fiber, characterized in that: The invention comprises a sleeve positioning support plate (1), a tube core positioning support plate (2), a sleeve (3) and a tube core (4); the sleeve positioning support plate (1) and the tube core positioning support plate (2) are arranged side by side, the sleeve positioning support plate (1) is provided with a positioning hole (7), one end of the sleeve (3) passes through the sleeve positioning support plate (1) through the positioning hole (7) and is arranged toward the tube core positioning support plate (2), the tube core positioning support plate (2) is provided with a mounting groove, one end of the tube core (4) is assembled on the mounting groove, and the other end is inserted into the sleeve (3), a gap is formed between the outer wall of the tube core (4) and the inner wall of the sleeve (3), and a special-shaped hole (5) is formed in the gap, and the multi-core optical fiber (6) is inserted into the special-shaped hole (5) through the other end of the sleeve (3) to fill the gap and form a special-shaped light guide channel.

2. A mold structure for making a special-shaped end face of a multi-core optical fiber according to claim 1, characterized in that: The position of the positioning hole (7) on the sleeve positioning support plate (1) corresponds to the position of the mounting groove on the tube core positioning support plate (2).

3. A mold structure for making a special-shaped end face of a multi-core optical fiber according to claim 1, characterized in that: The center line of the sleeve (3) is parallel to the center line of the tube core (4).

4. A mold structure for making a special-shaped end face of a multi-core optical fiber according to claim 1, characterized in that: The plate surface of the positioning hole (7) provided on the sleeve positioning support plate (1) is parallel to the plate surface of the mounting groove provided on the tube core positioning support plate (2).

5. The mold structure for making a special-shaped end face of a multi-core optical fiber according to claim 1, characterized in that: The sleeve positioning support plate (1) is provided with a groove (9) from the position of the positioning hole (7) to the side wall of the plate surface, which is used to apply pressure to the sleeve (3).

6. A mold structure for making a special-shaped end face of a multi-core optical fiber according to claim 5, characterized in that: A threaded hole is provided at a position near the slot (9) on the top of the sleeve positioning support plate (1), and the threaded hole extends on the sleeve positioning support plate (1) to the slot (9), and a bolt (10) is threadedly connected in the threaded hole.

7. A mold structure for making a special-shaped end face of a multi-core optical fiber according to claim 6, characterized in that: The bolt (10) is arranged in a direction perpendicular to the sleeve (3) in the threaded hole.

8. The mold structure for making a special-shaped end face of a multi-core optical fiber according to claim 1, characterized in that: The bottoms of the sleeve positioning support plate (1) and the tube core positioning support plate (2) are respectively mounted on a multi-dimensional adjustment device (8) for adjusting the position between the sleeve positioning support plate (1) and the tube core positioning support plate (2).

9. The mold structure for making a special-shaped end face of a multi-core optical fiber according to claim 1, characterized in that: The structure of the special-shaped hole (5) includes a rectangular structure, a circular structure and a crescent-shaped structure.

10. The mold structure for manufacturing a special-shaped end face of a multi-core optical fiber according to claim 1, characterized in that: The multi-core optical fiber is located between the sleeve (3) and the tube core (4) in the special-shaped hole (5).

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