3D (three-dimensional) test fixture for LC (liquid crystal) insertion core

Abstract

The utility model discloses an LC insertion core 3D test fixture, comprising a mounting plate and a sleeve, the mounting plate is mounted at a corresponding position on an interferometer, the rear side surface is attached to a corresponding mounting surface on the interferometer, the middle of the front side surface is provided with a T-shaped through groove penetrating through the upper and lower side surfaces, the bottom surface of the T-shaped through groove is provided with a through hole, the notch of the T-shaped through groove is provided with a 45-degree chamfer, and the T-shaped through groove is provided with a through hole. The casing pipe is inserted into the through hole and fixedly connected with the through hole, the rear end face of the casing pipe is flush with the rear side face of the mounting plate, the inner diameter of the casing pipe is matched with the outer diameter of the LC insertion core, the LC insertion core can freely enter and exit from the casing pipe through the fit clearance without affecting the testing effect, and during working, the LC insertion core is inserted into the casing pipe and is perpendicular to the rear side face of the mounting plate. According to the utility model, the insertion core is fixed through the seamless sleeve for 3D testing, the fit clearance between the inner diameter of the sleeve and the outer diameter of the LC insertion core can ensure that the insertion core can freely enter and exit from the sleeve, but the clearance does not influence the testing result, so that the locking-free effect is realized, and the 3D testing efficiency and the 3D testing quality of the LC insertion core are greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of optical transmission connection devices in optical fiber communication, in particular to an LC ferrule 3D test fixture. Background Art

[0002] Ferrules are important components of optical communication systems. They are mainly used to interconnect optical ports between devices and between devices and optical cable cores. They are also widely used in optical transceiver modules. By encapsulating the optical fiber in the ferrule and assembling it into a fiber interface assembly, the connected optical fiber can communicate with the other optical transceiver module. Ferrule 3D is an important indicator of its polished surface, which has a direct impact on product performance. Ferrule 3D testing becomes particularly important.

[0003] Conventional LC ferrule 3D test fixtures use a torsion bar to rotate the screws to clamp the ferrule cylindrical surface, and the fixed ferrule is tested by an interferometer for the ferrule 3D surface shape. However, conventional fixtures are prone to wear due to repeated tightening / loosening of the screws, have a short service life, are difficult to repair, and have low test efficiency. Utility Model Content

[0004] In order to solve the problem that the above-mentioned existing LC ferrule 3D test fixture is easy to wear and has low test efficiency, the utility model provides an LC ferrule 3D test fixture, which fixes the ferrule through a seamless sleeve for 3D testing, and the matching clearance between the inner diameter of the sleeve and the outer diameter of the LC ferrule is set to 0.0007~0.0035mm, which can ensure that the ferrule can freely enter and exit the sleeve, but the clearance will not affect the test result, thus achieving lock-free test and greatly improving the LC ferrule 3D test efficiency and test quality.

[0005] To achieve the above-mentioned purpose, the utility model provides a LC ferrule 3D test fixture, characterized in that it comprises a mounting plate and a sleeve, the mounting plate is mounted at a corresponding position on the interferometer, the rear side surface is fitted with the corresponding mounting surface on the interferometer, a T-shaped through slot penetrating the upper and lower sides is provided in the middle of the front side surface, a through hole is provided on the bottom surface of the T-shaped through slot, and a 45-degree chamfer is provided at the notch of the T-shaped through slot, the sleeve is inserted into the through hole and fixedly connected to the through hole, the rear end surface of the sleeve is flush with the rear side surface of the mounting plate, the inner diameter of the sleeve matches the outer diameter of the LC ferrule, and the matching clearance allows the LC ferrule to freely enter and exit the sleeve without affecting the test effect, and when working, the LC ferrule is inserted into the sleeve and is perpendicular to the rear side surface of the mounting plate.

[0006] Furthermore, the through hole is perpendicular to the rear side of the mounting plate, and the verticality is ≤0.001 mm.

[0007] Furthermore, the end faces at both ends of the sleeve are perpendicular to the inner diameter of the sleeve, with a perpendicularity of ≤0.02mm, and the inner diameter of the sleeve is coaxial with the outer diameter, with a coaxiality of ≤0.02mm.

[0008] Furthermore, the inner diameter of the through hole and the outer diameter of the sleeve are set to be clearance fit, the fit tolerance is set to 0-0.02 mm, and the sleeve and the through hole are fixedly connected by gluing.

[0009] Furthermore, the outer circle and inner hole at the rear end of the sleeve are chamfered, and the radius of the fillet is set to 0.1mm. The chamfer R of the outer circle at the front end of the sleeve is set to 0.1mm. The inner hole at the front end is expanded into a tapered hole with a taper set to 30°, and the chamfer R at both ends of the tapered hole is set to 0.05mm.

[0010] The chamfered and rounded corners design facilitates the insertion of the LC ferrule into the sleeve, thus improving the test efficiency.

[0011] Furthermore, the sleeve is made of ZrO2.

[0012] The ZrO2 material is wear-resistant and makes the casing easy to replace during later maintenance.

[0013] Furthermore, the matching clearance between the inner diameter of the sleeve and the outer diameter of the LC ferrule is set to 0.0007-0.0035 mm, and the surface of the inner hole of the sleeve is polished with a finish of ≥ grade 9.

[0014] The clearance of 0.0007 to 0.0035 mm allows the LC ferrule to freely enter and exit the sleeve without affecting the test results; at the same time, it can also intercept dirt or residual glue on the outer cylindrical surface of the LC ferrule, thereby improving the 3D test quality of the LC ferrule.

[0015] Furthermore, the outer diameter of a conventional LC ferrule is ∅1.249±0.0005 mm, and the inner diameter of the sleeve is set to ∅1.2502-1.252 mm.

[0016] Furthermore, two screw mounting holes are symmetrically provided on the left and right sides of the front side of the mounting plate, for mounting the LC ferrule 3D test fixture on the interferometer.

[0017] Compared with the prior art, the beneficial effects of the utility model are as follows: the LC ferrule is fixed by a seamless sleeve for 3D testing, and the matching clearance between the inner diameter of the sleeve and the outer diameter of the LC ferrule is set to 0.0007-0.0035mm, ensuring that the ferrule can freely enter and exit the sleeve, but the clearance will not affect the test result, thus achieving lock-free and greatly improving the 3D test efficiency of the LC ferrule; when the outer cylindrical surface of the LC ferrule is dirty or has residual glue, it can be effectively intercepted by the sleeve, thus greatly improving the 3D test quality of the LC ferrule; at the same time, the sleeve is made of ZrO2 material, which is wear-resistant, easy to replace and maintain, has a long service life and low maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of an embodiment of the utility model;

[0019] Figure 2 This is a schematic diagram of the main view of an embodiment of the utility model;

[0020] Figure 3 for Figure 2 AA cross-sectional structure diagram;

[0021] Figure 4 This is a schematic diagram of the casing structure of an embodiment of the utility model;

[0022] Figure 5 This is a working state diagram of an embodiment of the utility model.

[0023] In the figure: 1. mounting plate, 101. T-shaped through slot, 102. through hole, 103. screw mounting hole, 2. sleeve, 3. LC ferrule. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0026] like Figures 1 to 5 As shown, the embodiment of the utility model is used for conventional LC ferrule testing.

[0027] It includes a mounting plate 1 and a sleeve 2. The mounting plate 1 is mounted at a corresponding position on the interferometer, and the rear side surface is fitted with the corresponding mounting surface on the interferometer. A T-shaped through slot 101 penetrating the upper and lower sides is provided in the middle of the front side surface of the mounting plate 1. A through hole 102 is provided on the bottom surface of the T-shaped through slot 101. The notch of the T-shaped through slot 101 is provided with a 45-degree chamfer. The sleeve 2 is inserted into the through hole 102 and fixedly connected to the through hole 102. The rear end surface of the sleeve 2 is flush with the rear side surface of the mounting plate 1. The inner diameter of the sleeve 2 matches the outer diameter of the LC ferrule 3. The outer diameter of the conventional LC ferrule is ∅1.249±0.0005mm. The inner diameter of the sleeve 2 is set to ∅1.2502~1.252mm. The surface of the inner hole is polished, and the finish is set to level 9.

[0028] The clearance between the inner diameter of the sleeve 2 and the outer diameter of the LC ferrule 3 is 0.0007-0.0035 mm. This clearance allows the conventional LC ferrule to freely enter and exit the sleeve 2 without affecting the test results, and can also intercept dirt or residual glue on the outer cylindrical surface of the LC ferrule 3, thereby improving the 3D test quality of the LC ferrule 3.

[0029] Furthermore, the through hole 102 is perpendicular to the rear side of the mounting plate 1, and the perpendicularity is ≤0.001 mm.

[0030] Furthermore, the end faces at both ends of the sleeve 2 are perpendicular to the inner diameter of the sleeve 2, with a perpendicularity of ≤0.02 mm, and the inner diameter and outer diameter of the sleeve 2 are coaxial, with a coaxiality of ≤0.02 mm.

[0031] Furthermore, the inner diameter of the through hole 102 and the outer diameter of the sleeve 2 are set to be clearance fit, the fit tolerance is set to 0-0.02 mm, and the sleeve 2 and the through hole 102 are fixedly connected by gluing.

[0032] Furthermore, the outer circle and inner hole at the rear end of the sleeve 2 are chamfered, and the radius of the fillet is set to 0.1mm. The chamfer R of the outer circle at the front end of the sleeve 2 is set to 0.1mm. The inner hole at the front end is expanded into a tapered hole with a taper set to 30°, and the chamfer R at both ends of the tapered hole is set to 0.05mm.

[0033] The chamfered and rounded corner designs facilitate the insertion of the LC ferrule 3 into the sleeve 2, thereby improving the test efficiency.

[0034] Furthermore, the sleeve 2 is made of ZrO2.

[0035] The ZrO2 material is wear-resistant and makes it easy to replace the casing 2 during later maintenance.

[0036] Furthermore, two screw mounting holes 103 are symmetrically provided on the left and right sides of the front side of the mounting plate 1 for mounting the 3D test fixture of the LC ferrule 3 on the interferometer.

[0037] The working method of the utility model is as follows: the mounting plate 1 is mounted at the corresponding position on the interferometer through screws and screw mounting holes 103, the rear side of the mounting plate 1 is fitted with the corresponding mounting surface of the interferometer, the LC ferrule 3 is inserted into the inner hole of the sleeve 2, perpendicular to the rear side of the mounting plate 1, and 3D testing can be performed.

[0038] The utility model does not need screw locking, and the matching clearance between the inner diameter of the sleeve 2 and the outer diameter of the LC ferrule 3 is 0.0007-0.0035mm, ensuring that the LC ferrule 3 can freely enter and exit the sleeve 2 without affecting the test result, thereby greatly improving the 3D test efficiency of the LC ferrule; when the outer cylindrical surface of the LC ferrule 3 is dirty or has residual glue, it can be effectively intercepted by the sleeve 2, thereby greatly improving the 3D test quality of the LC ferrule 3; at the same time, the sleeve 2 is made of ZrO2 material, which is wear-resistant, convenient for later replacement and maintenance, has a long service life, and has low maintenance costs.

[0039] The above are only preferred implementations of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A 3D test fixture for LC ferrule, characterized by: It includes a mounting plate and a sleeve, the mounting plate is mounted at a corresponding position on the interferometer, the rear side surface is fitted with the corresponding mounting surface on the interferometer, a T-shaped through slot penetrating the upper and lower sides is provided in the middle of the front side surface, a through hole is provided on the bottom surface of the T-shaped through slot, and a 45-degree chamfer is provided at the notch of the T-shaped through slot, the sleeve is inserted into the through hole and fixedly connected to the through hole, the rear end surface of the sleeve is flush with the rear side surface of the mounting plate, the inner diameter of the sleeve matches the outer diameter of the LC ferrule, and the matching clearance allows the LC ferrule to freely enter and exit the sleeve without affecting the test effect, and when working, the LC ferrule is inserted into the sleeve and is perpendicular to the rear side surface of the mounting plate.

2. The LC ferrule 3D test fixture according to claim 1, characterized in that: The through hole is perpendicular to the rear side of the mounting plate, and the verticality is ≤0.001mm.

3. The LC ferrule 3D test fixture according to claim 2, characterized in that: The end faces at both ends of the sleeve are perpendicular to the inner diameter of the sleeve, with a perpendicularity of ≤0.02mm; the inner diameter of the sleeve is coaxial with the outer diameter, with a coaxiality of ≤0.02mm.

4. The LC ferrule 3D test fixture according to claim 1, characterized in that: The inner diameter of the through hole and the outer diameter of the sleeve are set to be clearance fit, the fit tolerance is set to 0-0.02mm, and the sleeve and the through hole are fixedly connected by gluing.

5. The LC ferrule 3D test fixture according to claim 1, characterized in that: The outer circle and inner hole at the rear end of the sleeve are both rounded, and the radius of the fillet is set to 0.1mm. The rounded angle R of the outer circle at the front end of the sleeve is set to 0.1mm. The front end inner hole is expanded into a tapered hole with a taper set to 30°, and the rounded angle R at both ends of the tapered hole is set to 0.05mm.

6. The LC ferrule 3D test fixture according to claim 1, characterized in that: The sleeve is made of ZrO2.

7. The LC ferrule 3D test fixture according to claim 1, characterized in that: The matching clearance between the inner diameter of the sleeve and the outer diameter of the LC ferrule is set to 0.0007-0.0035 mm, and the surface of the inner hole of the sleeve is polished with a finish of ≥ grade 9.

8. The LC ferrule 3D test fixture according to claim 1, characterized in that: The outer diameter of a conventional LC ferrule is ∅1.249±0.0005 mm, and the inner diameter of the sleeve is set to ∅1.2502-1.252 mm.

9. The LC ferrule 3D test fixture according to claim 1, characterized in that: Two screw mounting holes are symmetrically arranged on the left and right sides of the front side of the mounting plate, and are used to mount the LC ferrule 3D test fixture on the interferometer.

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