Optical fiber bare fiber grinding tool

Abstract

This utility model relates to a bare optical fiber polishing fixture, including a polishing jig and a positioning jig. The polishing jig includes a positioning plate, an upper pressure plate, and a lower base plate stacked sequentially. The positioning plate has an optical fiber positioning groove extending through its front and rear ends. The optical fiber positioning groove is formed by an array of bare fiber grooves for accommodating bare optical fibers. The upper pressure plate is located at the upper part of one end of the positioning plate and is attached to the positioning plate to clamp the bare optical fiber. The lower base plate is located at the lower part of one end of the positioning plate and is attached to the positioning plate to support the positioning plate. The polishing jig is placed on the positioning jig to position the length of the bare optical fiber extending out of the polishing jig. This utility model, through the cooperation of the polishing jig and the positioning jig, not only enables multiple optical fibers to be fixed simultaneously in the polishing jig for overall clamping, improving clamping stability, but also reduces the risk of easy breakage of the end of a single optical fiber due to friction from the polishing paper, thereby improving the polishing efficiency of bare optical fibers.

Description

Technical Field

[0001] This utility model belongs to the field of optical fiber bare fiber polishing technology, and specifically relates to an optical fiber bare fiber polishing fixture. Background Technology

[0002] Bare optical fibers are widely used in the communications field, and the quality of their end-face polishing directly affects optical signal transmission performance. Traditional polishing fixtures often use a single clamp for holding and positioning, that is, clamping and fixing a single bare optical fiber in a pen holder, with the fiber extending from the end of the pen holder. The pen holder is then fixed to the fiber polishing machine, so that the end of the fiber contacts the polishing paper on the polishing disc. The end face of the fiber is polished by controlling the rotation of the polishing disc and the descent height of the pen holder. This polishing method has the following problems:

[0003] 1. The fiber extension length is difficult to control precisely, and the polishing quality cannot be determined by the fiber polishing length. It can only be roughly determined by the polishing time and the polishing disc speed.

[0004] 2. Insufficient clamping stability: Since the bare optical fiber is in contact with the polishing paper alone, the end of the single bare optical fiber is prone to breakage due to the friction of the polishing paper during the rotation of the polishing disc.

[0005] 3. Since only one bare optical fiber can be installed at a time, each polishing operation can only target one bare optical fiber, resulting in low polishing efficiency.

[0006] Therefore, there is an urgent need for a high-efficiency optical fiber bare fiber polishing fixture. Utility Model Content

[0007] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a bare optical fiber polishing fixture. This fixture, through the cooperation of polishing fixture and positioning fixture, not only achieves precise control of the optical fiber extension length, but also can polish multiple bare optical fibers in sequence, making the bare optical fibers less prone to breakage and achieving high polishing efficiency.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0009] A bare optical fiber polishing fixture includes a polishing jig and a positioning jig. The polishing jig includes a positioning plate, an upper pressure plate, and a lower base plate stacked sequentially. The positioning plate has an optical fiber positioning groove extending through its front and rear ends. At least one end of the optical fiber positioning groove is formed by a parallel array of bare fiber grooves for accommodating bare optical fibers. The upper pressure plate is disposed on the upper part of one end of the positioning plate and is attached to the positioning plate at one end of the bare fiber groove to clamp the bare optical fiber. The lower base plate is disposed on the lower part of one end of the positioning plate and is attached to the positioning plate to support the positioning plate. The polishing jig is placed on the positioning jig to position the length of the bare optical fiber extending beyond the polishing jig.

[0010] Furthermore, the fiber positioning slot also includes a planar cavity, which is connected to the bare fiber slot.

[0011] Furthermore, the positioning plate, the upper pressure plate, and the lower base plate are all provided with through holes, which are interconnected vertically and through which connecting members are inserted.

[0012] Furthermore, both the positioning plate and the upper pressure plate are provided with through holes, and the lower base plate is provided with screw holes. The through holes and screw holes are interconnected, and connectors are inserted into the through holes and screw holes.

[0013] Furthermore, when the bare optical fiber is located in the bare fiber groove, the upper surface of the bare optical fiber is slightly higher than the upper end surface of the positioning plate, and the surfaces of adjacent bare optical fibers are tangent.

[0014] Furthermore, the upper pressure plate is provided with positioning holes, at least a pair of positioning holes are arranged at intervals relative to each other, and a positioning pin for inserting into the corresponding positioning hole is provided on the upper part of one end of the positioning plate. The positioning pins are arranged at intervals relative to each other and are located on both sides of the optical fiber positioning groove.

[0015] Furthermore, a suction member is provided on the upper part of the other end of the positioning plate, and at least one pair of suction members are arranged at intervals relative to each other and located on both sides of the optical fiber positioning groove.

[0016] Furthermore, the bare fiber groove is a V-shaped groove, and the attracting element is a magnet.

[0017] Furthermore, the positioning plate is a T-shaped plate formed by connecting a horizontal long plate and a vertical short plate, the optical fiber positioning groove passes through the horizontal long plate and the vertical short plate, the suction member is disposed on the horizontal long plate, the through hole is disposed on the vertical short plate, and the upper pressure plate and the lower base plate are disposed opposite each other on the upper and lower sides of the vertical short plate.

[0018] Furthermore, the upper pressure plate includes a rigid plate and an elastic plate, which are attached to each other vertically. One side of the elastic plate is attached to the positioning plate for clamping the bare optical fiber.

[0019] Furthermore, the positioning fixture includes a support plate and a height-fixing plate. The height-fixing plate is vertically disposed at one end of the support plate and the two are vertically connected. The height-fixing plate has a height-fixing groove for stopping the end of the bare optical fiber. The lower substrate is placed on the support plate to support the positioning plate. One end of the positioning plate is in contact with the height-fixing plate, and the height-fixing groove is opposite to the end of the bare optical fiber.

[0020] Due to the adoption of the above technical solution, this utility model has the following advantages and effects:

[0021] This utility model discloses a bare fiber polishing fixture. Through the cooperation of a polishing fixture and a positioning fixture, multiple optical fibers can be simultaneously fixed in the polishing fixture for overall clamping, improving clamping stability and reducing the risk of end breakage of individual optical fibers due to friction from polishing paper. At the same time, the positioning fixture limits the overall length of the bare fiber protrusion, ensuring that the length of all bare optical fibers protruding from the polishing fixture is consistent, improving the polishing quality of the bare fiber end face. Furthermore, multiple bare optical fibers can be polished simultaneously in a single clamping, improving polishing efficiency. It is compatible with various optical fiber polishing machines on the market, has a universal cavity, and is especially suitable for batch processing scenarios. Attached Figure Description

[0022] Figure 1 This is an isometric structural diagram of the combined state of this utility model.

[0023] Figure 2 This is a schematic diagram of the grinding fixture structure of this utility model.

[0024] Figure 3 This is an isometric structural diagram of the positioning fixture of this utility model.

[0025] Figure 4 for Figure 3 Top view.

[0026] Figure 5 for Figure 4 A magnified view of part A.

[0027] Figure 6 This is an isometric structural diagram of the positioning plate of this utility model.

[0028] Figure 7 for Figure 6 Top view.

[0029] Figure 8 for Figure 7 Side view.

[0030] Figure 9 for Figure 7 A magnified schematic diagram of part B.

[0031] Figure 10This is an isometric structural diagram of the upper pressure plate of this utility model.

[0032] Figure 11 This is a schematic diagram of the isometric structure of the lower substrate of this utility model.

[0033] Reference numerals: 1-Grinding fixture, 11-Upper pressure plate, 111-Through hole, 112-Positioning hole, 12-Positioning plate, 121-Bare fiber groove, 122-Planar groove cavity, 123-Suction fitting, 124-Pin hole, 13-Lower substrate, 131-Screw hole, 132-Insertion step, 2-Positioning fixture, 21-Support plate, 22-Height plate, 221-Height groove, 3-Bare fiber. Detailed Implementation

[0034] The embodiments of this utility model will be described in detail below with reference to the accompanying drawings, so as to better understand the purpose, features and advantages of this utility model. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of this utility model, but are only for illustrating the essential spirit of the technical solution of this utility model.

[0035] like Figure 1 As shown. This utility model discloses a bare fiber polishing fixture, comprising a polishing clamp 1 and a positioning clamp 2. The polishing clamp 1 is used to clamp and fix multiple bare fiber 3s. When the polishing clamp 1 is placed on the positioning clamp 2, one end of the polishing clamp 1 is in contact with the positioning clamp 2. The positioning clamp 2 can be used to position the length of all bare fiber 3s extending out of the polishing clamp 1 at one time. After the length of the bare fiber 3s extending out is positioned, the polishing clamp 1 is locked to clamp and fix all bare fiber 3s. The polishing clamp 1 can then be detached from the positioning clamp 2 and inserted independently into the fiber polishing fixture for polishing the end faces of the bare fiber 3s.

[0036] like Figure 2 As shown, the grinding fixture 1 includes a positioning plate 12, an upper pressure plate 11, and a lower substrate 13 stacked sequentially. The positioning plate 12 has an optical fiber positioning groove extending through its front and rear ends. One end of the optical fiber positioning groove is formed by an array of bare fiber grooves for accommodating bare optical fibers. The upper pressure plate 11 is disposed on the upper part of one end of the positioning plate 12 and fits against the positioning plate 12 to clamp the bare optical fiber 3. The lower substrate 13 is disposed on the lower part of one end of the positioning plate 12 and fits against the positioning plate 12 to support the positioning plate 12. The upper pressure plate 11 and the lower substrate 13 are disposed opposite each other on both sides of the positioning plate 12.

[0037] like Figures 3-5As shown. The positioning fixture 2 includes a support plate 21 and a height-fixing plate 22. The height-fixing plate 22 is vertically disposed at one end of the support plate 21 and the two are vertically connected. The height-fixing plate 22 has a height-fixing groove 221 for stopping the end of the bare optical fiber 3. The lower base plate 13 is placed on the support plate 21 to support the positioning plate 12, so that a gap is formed between the positioning plate 12 and the support plate 21. One end of the positioning plate 12 is in contact with the height-fixing plate 22, and the height-fixing groove 221 is opposite to the end of the bare optical fiber 3. The depth of the height-fixing groove 221 is determined by the length of the bare optical fiber 3 extending from the end of the positioning plate 12, and the depth of the height-fixing groove 221 is the same as the length of the bare optical fiber extending out.

[0038] The fiber positioning slot is located at the axial center of the positioning plate 12. The upper pressure plate 11 and the lower substrate 13 are located on the upper and lower surfaces of one end of the positioning plate 12, respectively. The outer end faces of the upper pressure plate 11, the lower substrate 13, and the positioning plate 12 are flush. The upper pressure plate 11 can be magnetically attached to the positioning plate 12 to hold the bare fiber 3. The lower substrate 13 can be adhesively attached to the positioning plate 12 to support the height of the positioning plate 12.

[0039] like Figure 6 As shown. Furthermore, the fiber positioning slot also includes a planar cavity 122, which is connected to the bare fiber slot 121 from front to back. Specifically, the planar cavity 122 communicates with several arrayed bare fiber slots 121. The planar cavity 122 is used to accommodate the pigtails of the bare fiber. After the front end of each bare fiber is positioned within the bare fiber slot 121, the rear end extends sequentially into the planar cavity and extends from the planar cavity 122 to form the polishing fixture 1.

[0040] As a preferred option, the fiber positioning slot may consist of only an array of bare fiber slots 121, with the bare fiber slots 121 extending through both ends of the upper surface of the positioning plate 12.

[0041] like Figure 7 , Figure 8 , Figure 10 and Figure 11 As shown. Furthermore, in order to facilitate the connection of the positioning plate 12, the upper pressure plate 11 and the lower substrate 13, the positioning plate 12 and the upper pressure plate 11 are provided with through holes 111, and the lower substrate 13 is provided with screw holes 131. The screw holes 131 and the through holes 111 are connected to each other. At this time, the connecting members are inserted in the through holes 111 and the screw holes 131 to connect the positioning plate 12, the upper pressure plate 11 and the lower substrate 13 into one unit.

[0042] Specifically, both the positioning plate 12 and the upper pressure plate 11 are provided with at least one pair of through holes 111. The through holes 111 on the positioning plate 12 are respectively located on both sides of the fiber positioning groove. The through holes on the upper pressure plate 11 are connected to the through holes 111 on the positioning plate 12 and the screw holes 131 on the lower substrate 13.

[0043] At this time, the connecting component is preferably a bolt. The bolt passes through the through holes on the upper pressure plate 11 and the positioning plate 12 in sequence and is screwed into the screw hole 131 to realize the connection between the positioning plate 12, the upper pressure plate 11 and the lower base plate 13.

[0044] Of course, as a preferred embodiment, the positioning plate 12, the upper pressure plate 11, and the lower substrate 13 are all provided with through holes 111. The through holes 111 are interconnected vertically and are connected by connectors to form a whole. The positioning plate 12, the upper pressure plate 11, and the lower substrate 13 are each provided with at least one pair of through holes 111. The through holes 111 on the positioning plate 12 are respectively located on both sides of the fiber positioning groove, and the through holes on the upper pressure plate 11 and the lower substrate 13 are correspondingly connected to the through holes 111 on the positioning plate 12.

[0045] At this time, the connecting parts are preferably bolt and nut assemblies. When the positioning plate 12, the upper pressure plate 11 and the lower base plate are attached, the bolt is inserted into the through hole and then fastened by the nut. The nut is embedded in the lower base plate. The bolt can be a countersunk bolt.

[0046] Furthermore, to facilitate clamping the bare optical fiber 3, the upper surface of the bare optical fiber 3 is slightly higher than the upper end face of the positioning plate 12. When the upper pressure plate 11 is placed on the positioning plate 12, a certain pressure can be applied to the upper surface of the bare optical fiber 3 to facilitate clamping and fixing the bare optical fiber 3. At the same time, when the bare optical fiber 3 is located in the bare fiber groove 121, the horizontal radial surfaces of adjacent bare optical fibers 3 are arranged tangentially to ensure that the bare optical fiber 3 can be confined within the bare fiber groove 121 after being subjected to force and does not move laterally.

[0047] Again Figure 7 , Figure 10 As shown. Further, the upper pressure plate 11 is provided with positioning holes 112, at least a pair of positioning holes 112 are arranged at intervals relative to each other along the radial direction of the bare optical fiber 3, and a positioning pin for inserting into the corresponding positioning hole 112 is provided on the upper part of one end of the positioning plate 12, the positioning pins are arranged at intervals relative to each other and located on both sides of the optical fiber positioning groove.

[0048] Specifically, the positioning plate 12 is provided with a pin hole 124, one end of the positioning pin is inserted and fixed in the pin hole 124, the positioning pin and the pin hole are interference fit, and the positioning hole 112 and the positioning pin are clearance fit, which facilitates the disassembly of the positioning plate 12.

[0049] Furthermore, to facilitate the positioning of the polishing fixture 1 on the fiber polishing fixture, a suction member 123 is provided on the upper part of the other end of the positioning plate 12. At least one pair of suction members 123 are arranged at intervals and located on both sides of the fiber positioning groove. The fiber polishing fixture is provided with a bonding member corresponding to the suction member 123. The bonding member and the suction member can be attracted to each other to realize the positioning and installation of the positioning plate 12.

[0050] Furthermore, in order to facilitate the insertion of the polishing fixture 1 into the insertion hole of the optical fiber polishing fixture, the lower substrate 13 is provided with an insertion step 132 on the end face of the two sides of the optical fiber positioning groove. When the polishing fixture 1 is inserted into the insertion hole of the optical fiber polishing fixture, the insertion step 132 can stop on the upper end of the insertion hole to position the insertion depth of the polishing fixture 1. The insertion step 132 is located on both sides of the lower substrate at the end away from the bare fiber end. The outwardly protruding end face of the insertion step 132 is flush with the two sides of the positioning plate 12 and the upper pressure plate 11.

[0051] like Figure 9 As shown. Furthermore, the bare fiber groove 121 is a V-shaped groove, and both the attracting component 123 and the bonding component are magnets.

[0052] Specifically, to facilitate the positioning and clamping of the bare optical fiber 3, the cross-section of the bare fiber groove is a V-shaped structure. The V-shaped groove and the upper pressure plate 11 form three axes to clamp and fix the bare optical fiber 3. The included angle of the V-shaped groove is preferably 90°. The spacing between adjacent V-shaped grooves is such that when the bare optical fiber 3 is placed in the V-shaped groove, the horizontal radial direction of adjacent bare optical fibers 3 is tangent, which can ensure that the bare optical fiber 3 is always positioned in its respective V-shaped groove.

[0053] Of course, the shape of the bare fiber groove is not limited to a V-shaped groove. Other shapes and structures can be selected, such as U-shaped, trapezoidal, or other shapes, as long as they meet the axial positioning requirements of the bare fiber.

[0054] Furthermore, the positioning plate 12 is formed by connecting a horizontal long plate and a vertical short plate to form a T-shaped plate. The fiber positioning groove runs through the horizontal long plate and the vertical short plate. The suction member 123 is disposed on the horizontal long plate, and the through hole is disposed on the vertical short plate. The upper pressure plate 11 and the lower substrate 13 are disposed opposite each other on the upper and lower sides of the vertical short plate. The outer peripheral dimensions of the upper pressure plate 11 and the lower substrate 13 are the same as those of the vertical short plate, so that the outer peripheral end faces of the upper pressure plate 11 and the lower substrate 13 are flush with the outer peripheral end faces of the vertical short plate.

[0055] Furthermore, to avoid damaging the bare optical fiber 3 during clamping, the upper pressure plate 11 includes a rigid plate and an elastic plate, which are connected and fitted together. One side of the elastic plate is fitted with the positioning plate 12 to clamp the bare optical fiber 3. A through hole 111 penetrates both the rigid plate and the elastic plate. The elastic plate is made of elastic materials such as silicone, and its combination with the rigid plate ensures clamping force while preventing scratches on the surface of the optical fiber.

[0056] When using this utility model, firstly, the lower base plate 13 and positioning plate 12 of the grinding fixture 1 are placed on the support plate of the positioning fixture 2. Then, the bare optical fiber 3 is placed in the optical fiber positioning groove in sequence. The length of the bare optical fiber 3 extending out of the optical fiber positioning groove is slightly greater than the actual required length. Then, the upper pressure plate 11 is placed on the positioning plate 12 to pre-clamp the bare optical fiber 3. Then, the entire grinding fixture 1 is pushed so that the end of the positioning plate 12 is aligned with the height plate of the positioning fixture 2. During the pushing process, the end of the bare optical fiber 3 is blocked and aligned by the height groove 221 on the height plate. Then, the upper pressure plate 11, positioning plate 12 and lower base plate 13 are fastened together by the connector to clamp the bare optical fiber.

[0057] Second, remove the grinding fixture 1 from the positioning fixture 2, and then insert it into the socket of the fiber optic grinding fixture. When placed, the suction part of the grinding fixture 1 and the contact part of the fiber optic grinding fixture can be suctioned together to achieve the positioning of the grinding fixture 1 on the fiber optic grinding fixture.

[0058] Third, place the fiber polishing fixture on the polishing machine to polish and grind the ends of the bare fiber.

[0059] Fourth, after the grinding is completed, remove the grinding fixture and disassemble it, and then take out the ground bare optical fiber 3 in sequence.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A fixture for polishing bare optical fibers, characterized in that, The device includes a grinding fixture and a positioning fixture. The grinding fixture includes a positioning plate, an upper pressure plate, and a lower base plate stacked sequentially. The positioning plate has an optical fiber positioning groove extending through its front and rear ends. At least one end of the optical fiber positioning groove is formed by an array of bare fiber grooves for accommodating bare optical fibers. The upper pressure plate is disposed on the upper part of one end of the positioning plate and is attached to the positioning plate at one end of the bare fiber groove to clamp the bare optical fiber. The lower base plate is disposed on the lower part of one end of the positioning plate and is attached to the positioning plate to support the positioning plate. The grinding fixture is placed on the positioning fixture to position the length of the bare optical fiber extending out of the grinding fixture.

2. The optical fiber bare fiber polishing fixture according to claim 1, characterized in that, The fiber positioning slot also includes a planar cavity, which is connected to the bare fiber slot.

3. The optical fiber bare fiber polishing fixture according to claim 2, characterized in that, Both the positioning plate and the upper pressure plate are provided with through holes, and the lower base plate is provided with screw holes. The through holes and screw holes are interconnected, and connectors are inserted into the through holes and screw holes.

4. The optical fiber bare fiber polishing fixture according to claim 3, characterized in that, When the bare optical fiber is located in the bare fiber groove, the upper surface of the bare optical fiber is slightly higher than the upper end surface of the positioning plate, and the surfaces of adjacent bare optical fibers are tangent.

5. The optical fiber bare fiber polishing fixture according to claim 4, characterized in that, The upper pressure plate is provided with positioning holes, and at least a pair of positioning holes are arranged at intervals relative to each other. One end of the positioning plate is provided with a positioning pin for inserting into the corresponding positioning hole. The positioning pins are arranged at intervals relative to each other and are located on both sides of the fiber positioning groove.

6. The optical fiber bare fiber polishing fixture according to claim 5, characterized in that, A suction member is provided on the upper part of the other end of the positioning plate, and at least one pair of suction members are arranged at intervals relative to each other and located on both sides of the optical fiber positioning groove.

7. The optical fiber bare fiber polishing fixture according to claim 6, characterized in that, The bare fiber groove is a V-shaped groove, and the attracting element is a magnet.

8. The optical fiber bare fiber polishing fixture according to claim 7, characterized in that, The positioning plate is a T-shaped plate formed by connecting a horizontal long plate and a vertical short plate. The optical fiber positioning groove runs through the horizontal long plate and the vertical short plate. The suction member is set on the horizontal long plate. The through hole is set on the vertical short plate. The upper pressure plate and the lower base plate are arranged opposite each other on the upper and lower sides of the vertical short plate.

9. The optical fiber bare fiber polishing fixture according to claim 1, characterized in that, The upper pressure plate includes a rigid plate and an elastic plate, which are attached to each other vertically. One side of the elastic plate is attached to the positioning plate for clamping the bare optical fiber.

10. A bare optical fiber polishing fixture according to claim 1 or 9, characterized in that, The positioning fixture includes a support plate and a height-fixing plate. The height-fixing plate is vertically disposed at one end of the support plate and the two are vertically connected. The height-fixing plate has a height-fixing groove for stopping the end of the bare optical fiber. The lower base plate is placed on the support plate to support the positioning plate. One end of the positioning plate is in contact with the height-fixing plate, and the height-fixing groove is opposite to the end of the bare optical fiber.

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