Tail fiber adapter assembly

Abstract

The utility model provides a tail fiber adapter assembly, which relates to the technical field of optical fibers and comprises a bare optical fiber, a coupling insertion core, a butt joint insertion core, a metal handle, a core fixing piece, an elastic sleeve and an interface piece. The coupling insertion core and the butt joint insertion core are respectively provided with an optical fiber insertion hole, the length of the butt joint insertion core is 3.75 mm, and the bare optical fiber is sleeved with an empty sleeve. The metal handle is sleeved outside the coupling insertion core and the hollow sleeve at the same time, and a first heat shrink tube is sleeved outside the outer surface of one end of the metal handle and the hollow sleeve; the hollow sleeve is sleeved with the core fixing piece, the outer surface of one end of the core fixing piece and the hollow sleeve are jointly sleeved with a second heat shrink tube, the other end of the core fixing piece is provided with a first counter bore matched with the end of the butt joint insertion core, one end of the first counter bore is provided with a second counter bore matched with the end of the connector piece, the connector piece is provided with a third counter bore, and the elastic sleeve is located in the third counter bore. A limiting block is elastically arranged on the inner wall of the third counter bore in the direction perpendicular to the length of the elastic sleeve, and a limiting concave ring is arranged on the outer surface of the elastic sleeve. The problem that the occupied space is large is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of optical fibers, and particularly relates to a pigtail adapter assembly. Background Art

[0002] An optical fiber terminal box is the end joint of an optical cable. One end is the optical cable, and the other end is the pigtail. It is equivalent to a device that splits an optical cable into single optical fibers. With the upgrade and transformation of the customer's optical fiber terminal box, the integration degree of optoelectronic components on the main board is higher, and the overall volume of the product can be further reduced. In traditional BOSA devices used for optoelectronic transmission, the volume ratio of the pigtail fiber jumper is more than 90%. The docking end of the existing pigtail fiber jumper product is an SC / PC connector. The length from the end face to the tail sleeve exceeds 35 mm, the outer diameter exceeds 9 mm, and the shortest length of the coupling end SUS plus the tail sleeve also requires 10 mm of space, which cannot meet the requirement of small space occupation. Therefore, it is necessary to design a pigtail adapter assembly that can meet the space occupation requirements. Content of the Utility Model

[0003] Aiming at the deficiencies in the prior art, the utility model provides a pigtail adapter assembly, which solves the problem of large occupied volume.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A pigtail adapter assembly includes: a bare optical fiber, a coupling ferrule, a docking ferrule, a metal handle, a core fixing member, an elastic sleeve, and an interface member;

[0006] Both the coupling ferrule and the docking ferrule are provided with optical fiber jacks. Two ends of the bare optical fiber are respectively inserted into the optical fiber jacks. The length of the docking ferrule is 3.75 mm. An empty sleeve is sleeved outside the bare optical fiber, and the empty sleeve is located between the coupling ferrule and the docking ferrule;

[0007] The metal handle is simultaneously sleeved outside the coupling ferrule and the empty sleeve. A first heat shrinkable tube is jointly sleeved on the outer surface of one end of the metal handle and the outside of the empty sleeve;

[0008] The core fixing member is sleeved on the empty sleeve. A second heat shrinkable tube is jointly sleeved on the outer surface of one end of the core fixing member and the outside of the empty sleeve. The other end is provided with a first counterbore that cooperates with the end of the docking ferrule. The end of the first counterbore far from the second heat shrinkable tube is provided with a second counterbore that cooperates with the end of the interface member. One end of the interface member close to the core fixing member is provided with a third counterbore. The elastic sleeve is located in the third counterbore, and a part of the docking ferrule is located in the elastic sleeve;

[0009] The inner wall of the third counterbore is elastically provided with a limiting block along the direction perpendicular to the length of the elastic sleeve. The outer surface of the elastic sleeve is provided with a limiting concave ring for the limiting block to extend into.

[0010] Preferably, a groove is provided on the inner wall of the third counterbore, and a compression spring is fixedly connected between the bottom of the groove and the limiting block.

[0011] Preferably, a third heat shrinkable tube is further sleeved outside the empty sleeve, and the third heat shrinkable tube is located between the first heat shrinkable tube and the second heat shrinkable tube.

[0012] Preferably, the metal handle includes an integrally formed ring and a cylinder, and the outer diameter of the cylinder is 2 mm.

[0013] Preferably, a recess is provided along the circumferential direction of the interface member near the fixed core member, and a protruding portion cooperating with the recess is provided in the second counterbore.

[0014] Preferably, a fiber optic pigtail insertion hole coaxially communicating with the third counterbore is provided at one end of the interface member away from the fixed core member.

[0015] The utility model has the following beneficial effects:

[0016] By selecting a butt plug core with a length of 3.75 mm and cooperating with the second heat shrinkable tube, the fixed core member, the interface member, etc., the length of the docking end of the traditional pigtail fiber optic jumper product is shortened, and the product length is controlled to the greatest extent to save space; and the long tail sleeve of the traditional SUS coupling end is replaced by the first heat shrinkable tube, and the coupling end length is shortened, so that the overall length meets the requirement of small space occupation.

[0017] Other advantages, objectives and features of the utility model will be partially reflected by the following description, and partially will be understood by those skilled in the art through the research and practice of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic cross-sectional view of the overall structure of the utility model;

[0019] Figure 2 is a partial cross-sectional view of a partial structure of the utility model.

[0020] In the above-mentioned drawings: 1, bare optical fiber; 11, empty sleeve; 2, coupling plug core; 3, butt plug core; 4, metal handle; 5, fixed core member; 51, first counterbore; 52, second counterbore; 6, elastic sleeve; 7, interface member; 71, third counterbore; 72, recess; 73, fiber optic pigtail insertion hole; 81, first heat shrinkable tube; 82, second heat shrinkable tube; 83, third heat shrinkable tube; 9, limiting block; 91, compression spring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] In order to make the technical means, creative features, achieved objectives and functions realized by the present utility model clearer and easier to understand, the technical solutions in the present utility model will be further described below in conjunction with the drawings and embodiments.

[0022] Please refer to Figure 1 and Figure 2 As shown, a pigtail adapter assembly includes: a bare optical fiber 1, a coupling ferrule 2, a docking ferrule 3, a metal handle 4, a core fixing member 5, an elastic sleeve 6 and an interface member 7; both the coupling ferrule 2 and the docking ferrule 3 are provided with optical fiber jacks for precisely positioning the optical fiber. The two ends of the bare optical fiber 1 are respectively inserted into the optical fiber jacks. The length of the docking ferrule 3 is 3.75 mm. An empty sleeve 11 is sleeved outside the bare optical fiber 1, and the empty sleeve 11 is located between the coupling ferrule 2 and the docking ferrule 3; the metal handle 4 is simultaneously sleeved outside the coupling ferrule 2 and the empty sleeve 11, and a first heat shrinkable tube 81 is jointly sleeved outside the outer surface of one end of the metal handle 4 and the empty sleeve 11; the core fixing member 5 is sleeved on the empty sleeve 11, a second heat shrinkable tube 82 is jointly sleeved outside the outer surface of one end of the core fixing member 5 and the empty sleeve 11, and a first counterbore 51 for cooperating with the end of the docking ferrule 3 is provided at the other end. A second counterbore 52 for cooperating with the end of the interface member 7 is provided at one end of the first counterbore 51 away from the second heat shrinkable tube 82. A third counterbore 71 is provided at one end of the interface member 7 close to the core fixing member 5. The elastic sleeve 6 is located in the third counterbore 71, and a part of the docking ferrule 3 is located in the elastic sleeve 6; a limiting block 9 is elastically provided on the inner wall of the third counterbore 71 along the direction perpendicular to the length of the elastic sleeve 6, and a limiting concave ring for the limiting block 9 to extend into is provided on the outer surface of the elastic sleeve 6.

[0023] The coupling ferrule 2 adopts a ceramic ferrule with a size of φ1.25x3mm. The length of the metal handle 4 matched with the coupling ferrule 2 is controlled to be less than 3mm. The metal handle 4 is made of SUS material to ensure excellent welding performance. Furthermore, the metal handle 4 includes an integrally formed ring and a cylinder. The outer diameter of the cylinder is 2mm, so that the outer diameter is less than 2.5mm after the first heat shrink tube 81 is installed; the bare optical fiber 1 adopts G657A2 bend-resistant bare optical fiber, and its minimum bending radius of R7.5mm enables the product to be used in a small space; the empty sleeve 11 covers the bare optical fiber 1, which plays a good protective role for the bare optical fiber 1, and UV glue is applied between the gap between the end where the bare optical fiber 1 is connected to the coupling ferrule 2 and the tube mouth of the empty sleeve 11. The butt plug 3 and the fixed core piece 5 are tightly assembled, and the fixed core piece 5 cooperates with the interface piece 7, and a second heat shrink tube 82 is set. The length of the second heat shrink tube 82 is controlled to be above 3mm and below 5mm, so that the entire length is shortened, and AB glue is applied between the end where the bare optical fiber 1 is connected to the butt plug 3 and the mouth of the empty sleeve 11. The glue has good adhesion and can meet the product tensile requirements. Its hardness after curing is slightly lower than 353 glue, which plays a better protective role for the optical cable. A limit block 9 is set in the third countersunk hole 71 of the interface piece 7, which can limit and fix the elastic sleeve 6. A butt plug 3 with a length of 3.75mm is selected, and it is matched with the second heat shrink tube 82, the fixed core piece 5 and the interface piece 7, etc., to shorten the length of the butt end of the traditional pigtail fiber jumper product, and control the product length to the greatest extent to save space; and the long tail sleeve of the traditional SUS coupling end is replaced with the first heat shrink tube 81 to shorten the length of the coupling end, so that the overall length meets the requirement of small space occupation.

[0024] Furthermore, if Figure 2 As shown, it is a specific structure of the elastic setting of the limit block 9, the inner wall of the third countersunk hole 71 is provided with a groove, and a compression spring 91 is fixedly connected between the bottom of the groove and the limit block 9. The elastic force of the compression spring 91 will cause the limit block 9 to partially extend out of the groove. When the elastic sleeve 6 is installed, the elastic sleeve 6 applies a pressure to the bottom of the groove to the limit block 9, the compression spring 91 is compressed, and the limit block 9 is stuck between the limit ring and the groove on the outer surface of the elastic sleeve 6.

[0025] Furthermore, if Figure 1 As shown, the third heat shrink tube 83 is also sleeved outside the empty sleeve 11, and the third heat shrink tube 83 is located between the first heat shrink tube 81 and the second heat shrink tube 82. The third heat shrink tube 83 is used to fix the optical cable to prevent the optical cable installed at the client from sliding.

[0026] Further, a recessed portion 72 is provided along the circumferential direction of one end of the interface member 7 close to the fixed core member 5, and a protruding portion that cooperates with the recessed portion 72 is provided in the second counterbore 52. The cooperation between the recessed portion 72 and the protruding portion in the second counterbore 52 can ensure the accurate docking of the interface member 7 and the fixed core member 5.

[0027] Further, a pigtail insertion hole 73 that is coaxially communicated with the third counterbore 71 is provided at one end of the interface member 7 away from the fixed core member 5 for inserting a pigtail.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A pigtail adapter assembly, characterized in that, Including: Bare optical fiber (1), coupling ferrule (2), butt ferrule (3), metal handle (4), core fixing member (5), elastic sleeve (6) and interface member (7); Both the coupling ferrule (2) and the butt ferrule (3) are provided with optical fiber jacks. Both ends of the bare optical fiber (1) are respectively inserted into the optical fiber jacks. The length of the butt ferrule (3) is 3.75 mm. An empty sleeve (11) is sleeved outside the bare optical fiber (1), and the empty sleeve (11) is located between the coupling ferrule (2) and the butt ferrule (3); The metal handle (4) is simultaneously sleeved outside the coupling ferrule (2) and the empty sleeve (11). A first heat shrinkable tube (81) is jointly sleeved outside one end outer surface of the metal handle (4) and the empty sleeve (11); The core fixing member (5) is sleeved on the empty sleeve (11). A second heat shrinkable tube (82) is jointly sleeved outside one end outer surface of the core fixing member (5) and the empty sleeve (11). The other end is provided with a first counterbore (51) for cooperating with the end of the butt ferrule (3). One end of the first counterbore (51) far from the second heat shrinkable tube (82) is provided with a second counterbore (52) for cooperating with the end of the interface member (7). One end of the interface member (7) close to the core fixing member (5) is provided with a third counterbore (71). The elastic sleeve (6) is located in the third counterbore (71), and a part of the butt ferrule (3) is located in the elastic sleeve (6); The inner wall of the third counterbore (71) is elastically provided with a limiting block (9) along the direction perpendicular to the length of the elastic sleeve (6). The outer surface of the elastic sleeve (6) is provided with a limiting concave ring for the limiting block (9) to extend into; 2. The fiber optic pigtail adapter assembly according to claim 1, wherein A groove is provided on the inner wall of the third counterbore (71), and a compression spring (91) is fixedly connected between the bottom of the groove and the limiting block (9); 3. The fiber optic pigtail adapter assembly according to claim 1, characterized in that, A third heat shrinkable tube (83) is also sleeved outside the empty sleeve (11), and the third heat shrinkable tube (83) is located between the first heat shrinkable tube (81) and the second heat shrinkable tube (82); 4. The pigtail adapter assembly according to claim 1, wherein The metal handle (4) includes an integrally formed ring and a cylinder, and the outer diameter of the cylinder is 2 mm; 5. The pigtail adapter assembly according to claim 1, characterized in that One end of the interface member (7) close to the core fixing member (5) is provided with a recessed portion (72) along the circumferential direction of the interface member (7), and a protruding portion for cooperating with the recessed portion (72) is provided in the second counterbore (52); 6. The fiber optic pigtail adapter component according to claim 1, wherein One end of the interface member (7) far from the core fixing member (5) is provided with a pigtail insertion hole (73) coaxially communicated with the third counterbore (71).

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