CN218917718U

CN218917718U - Small-size waterproof optical fiber plug

Info

Publication number: CN218917718U
Application number: CN202223142300.2U
Authority: CN
Inventors: 邓伟; 于剑武; 李世杰
Original assignee: Shenzhen Yongyi Technology Co ltd
Current assignee: Shenzhen Yongyi Technology Co ltd
Priority date: 2022-11-25
Filing date: 2022-11-25
Publication date: 2023-04-25
Anticipated expiration: 2032-11-25

Abstract

The utility model provides a small-size waterproof optical fiber plug, which comprises a plug main body, wherein the plug main body comprises an insertion part, the insertion part comprises a head sleeve piece and a tail sleeve piece, the head sleeve piece is connected with the tail sleeve piece in a threaded manner, so that the tail sleeve piece can move along the axial direction of the head sleeve piece and is used for coupling a light path; a plug outer sleeve screwed to the insertion portion; the plug coat is clamped with the matched adapter main body, and when the plug coat is in butt joint with the adapter main body, a clearance space is formed between the insertion part and the inside of the adapter main body, so that the inside of the plug coat is not contacted with the inside of the adapter main body in the butt joint process. The optical coupling device is simple in structure, ingenious in design, and firm in butt joint, the plug main body and the adapter are connected through threads, and optical coupling of optical fibers is achieved through the threaded connection mode of the plug main body, the plug main body and the plug outer sleeve.

Description

Small-size waterproof optical fiber plug

Technical Field

The utility model relates to the technical field of optical fiber couplers, in particular to a small-size waterproof optical fiber plug.

Background

Optical fiber plugs, also known as fiber optic connectors, are devices that make removable (active) connections between optical fibers, which precisely mate the two end surfaces of the optical fibers to maximize the coupling of the optical energy output by the transmitting fiber into the receiving fiber and to minimize the impact on the system due to its intervening optical links, which is a fundamental requirement of fiber optic connectors. To some extent, fiber optic connectors affect the reliability and various properties of the optical transmission system.

In the prior art, the connection mode inside the plug is usually a clamping mode, as shown in fig. 10 and 11, that is, a clamping part is arranged inside the plug to realize centering and abutting of the ferrule optical fiber and the optical fiber, so as to realize optical path coupling.

Disclosure of Invention

In order to solve the problems of poor connection strength and weak connection in the prior art, the utility model provides a small-size waterproof optical fiber plug.

The aim of the utility model is realized by the following technical scheme: a small-sized waterproof optical fiber plug, comprising a plug main body, the plug main body comprising an insertion portion, wherein the insertion portion comprises a head sleeve member and a tail sleeve member, the head sleeve member is in threaded connection with the tail sleeve member, so that the tail sleeve member can move along the axial direction of the head sleeve member and is used for coupling a light path;

a plug outer sleeve screwed to the insertion portion; the plug coat is clamped with the matched adapter main body, and when the plug coat is in butt joint with the adapter main body, a clearance space is formed between the insertion part and the inside of the adapter main body, so that the inside of the plug coat is not contacted with the inside of the adapter main body in the butt joint process.

Specifically, be equipped with on the plug overcoat and be used for matching the first arch of adapter main part joint, be equipped with on the adapter main part with first recess of first protruding looks adaptation.

Specifically, the outside of headgear still is equipped with first external screw thread, the plug overcoat is inside be equipped with first internal screw thread with first external screw thread looks adaptation.

Specifically, the interior of the head sleeve piece is also provided with a third internal thread, and the exterior of the tail sleeve piece is provided with a second external thread which is matched with the third internal thread.

Specifically, still establish the first sealing member that is used for dustproof and waterproof on the head external member.

Specifically, the plug main body is made of plastic material PIE, so that the precision of the plug main body is improved.

Specifically, a plug cap is further arranged on the plug outer sleeve, a cap connecting rope is connected between the plug outer sleeve and the plug cap, and a second sealing piece is further arranged on the plug cap.

Specifically, the plug jacket is also provided with a holding part.

Specifically, the inside boss that still is equipped with of adapter main part, two be equipped with the third sealing member between the boss.

Specifically, the first sealing element, the second sealing element and the third sealing element are all fluorine rubber.

Compared with the prior art, the utility model has the following advantages:

this application simple structure, design benefit, plug main part and adapter pass through threaded connection, and inside first external member of plug main part, tail external member and plug overcoat all realize the light path coupling of optic fibre through threaded connection mode, and joint strength is higher, and the three is more firm during the butt joint, and still is equipped with first sealing member on the first external member for inside waterproof dustproof after the three butt joint avoids the inside optic fibre of plug main part to wet and damages.

Drawings

FIG. 1 is an overall exploded schematic view of a small-sized waterproof optical fiber plug;

FIG. 2 is a schematic view of a small-sized waterproof optical fiber plug and a plug cap;

FIG. 3 is a schematic view of a small-sized waterproof fiber optic plug and adapter;

FIG. 4 is a schematic view in full semi-section of a small-sized waterproof optical fiber plug;

FIG. 5 is an enlarged view of a portion of FIG. 4A;

FIG. 6 is an enlarged view of a portion of B in FIG. 4;

FIG. 7 is an enlarged view of a portion of C in FIG. 4;

FIG. 8 is an enlarged view of part of D in FIG. 4;

FIG. 9 is a partial schematic view of a small-sized waterproof optical fiber plug;

FIG. 10 is a schematic diagram of a comparative part of the prior art;

FIG. 11 is an enlarged view of a portion of E in FIG. 10;

in the figure: 100 plug body, 200 insert, 210 head kit, 211 top holder, 212 insert, 213 insert spring, 214 first seal, 215 annular groove, 216 clearance space, 217 first external thread, 218 third internal thread, 219 shoulder, 220 tail kit, 221 crimp ring, 2211 second external thread, 300 plug housing, 301 first protrusion, 302 annular protrusion, 303 first internal thread, 304 first abutment surface, 306 second internal thread, 400 adapter body, 401 first groove, 402 mounting nut, 403 boss, 404 third seal, 500 plug cap, 501 cap connecting cord, 502 second seal, 600 double seal, 700 snap-on.

Detailed Description

In order that the utility model may be readily understood, a more complete description of the utility model will be rendered by reference to the appended drawings. The drawings illustrate preferred embodiments of the utility model. This utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The term "adjacent" as used herein includes "closely adjacent edges" and "slightly further" as used herein, the terms "inner", "outer", "left", "right" and the like are for illustrative purposes only and are not meant to be the only embodiment.

Referring to fig. 1-3, the present utility model relates to a small-sized waterproof optical fiber plug, including a plug body 100, which includes an insertion portion 200,

wherein the insertion portion 200 includes a head sleeve 210 and a tail sleeve 220, the head sleeve 210 is screwed to the tail sleeve 220, so that the tail sleeve 220 can move axially along the head sleeve 210 and is used for coupling optical paths;

a plug housing 300 screwed to the insertion portion 200; the plug housing 300 is clamped with a matched adapter body 400, and when the plug housing 300 is docked with the adapter body 400, a clearance space 216 is formed between the insertion portion 200 and the interior of the adapter body 400, so that the interior of the insertion portion and the interior of the adapter body 400 are not contacted in the docking process.

Referring to fig. 8, in this embodiment, the insertion portion 200 is mainly configured to dock with the matched adaptor body 400, the plug housing 300 is provided with a first protrusion 301 for clamping the matched adaptor body 400, the first protrusion 301 is located on an outer surface of the plug housing 300 and extends outward in a radial direction of the plug housing 300, and the first protrusion 301 has a spherical surface facing away from each other, a cambered surface or an inclined surface, and can be changed according to actual design requirements, so that the shape of the first protrusion is not limited herein;

referring to fig. 1-3, the insertion portion 200 is provided with a tail sleeve 220, in this embodiment, a crimp ring 221 is provided on the outer circumferential surface of the tail sleeve 220, and the reinforcing core inside the optical fiber can be crimped and fixed by a crimp pliers, so that the optical fiber is fixed to the tail sleeve 220, and then is fixed and sealed again by a hot-melt tube, so as to be used as an optical fiber fixing crimp structure and a waterproof and dustproof sealing structure at the rear end of the plug. In addition, the tail end of the tail sleeve 220 is further provided with a tail jacket to protect the plug optical fibers from bending damage.

Referring to fig. 1 and 4, the insertion portion 200 is provided with a head sleeve 210, the head sleeve 210 and the tail sleeve 220 together form a cavity, a holding member 211 is disposed in the cavity, and a cavity is also formed in the holding member 211, so that an optical fiber can be passed through for optical path coupling. A ferrule 212 and a ferrule spring 213 are installed in a space formed between the propping member 211 and the head cover 210, one end of the ferrule spring 213 is propped against the ferrule 212, and the other end is propped against the end face of the propping member 211. The front end of the lock pin is provided with a lock pin dust cap. In the present embodiment, the ferrule 212 may be a single core ferrule.

Referring to fig. 5-6, and further to the drawings, the head sleeve 210 is further provided with a first sealing ring, which performs a sealing and waterproof function when the head sleeve 210 is connected to the tail sleeve 220 or the plug housing 300.

Referring to fig. 5-6, as a preferred embodiment, the two ends of the head cover 210 are respectively provided with an annular groove 215, the annular groove 215 can accommodate one part of the first sealing ring, and the other part of the first sealing ring is exposed out of the annular groove 215 and is respectively abutted against the inner cavities of the adapter main body 400 and the plug outer sleeve 300, so that sealing and waterproofing are realized when the three parts are sequentially connected.

As a preferred embodiment, the first sealing member 214 in this example may be a fluorine rubber, which has a sealing hardness superior to that of a general rubber ring

As a preferred embodiment, the material of the insert portion 200 and the plug housing 300 in this embodiment may be a high-precision plastic material PIE for improving precision in fitting the components.

By adopting the two above-mentioned embodiments, the sealing element is selected again and the matching precision of the single part is improved, so that when the head sleeve 210 is connected towards one end of the adapter main body 400, only one annular groove 215 is required to be provided for adding one fluorine rubber, and the sealing waterproof grade of the ip68 can be achieved. It will be appreciated that in doing so, while achieving the waterproof requirement, the increase of the frictional loss of contact between the two sealing members when in butt joint can be avoided, referring to fig. 10-11, the size of the head set 210 product is reduced for the improvement of the double sealing member 600 or the multiple sealing members in the prior art to a single sealing member, so that the gap space 216 (referring to fig. 9) is formed inside the adaptor body 400 and the insertion part 200 when in butt joint, the frequent contact with the adaptor body 400 when in butt joint is avoided, and the increase of the connection loss is caused.

Referring to fig. 6, as a preferred embodiment, the outer portion of the head cover 210 is further provided with a first external thread 217, the inner portion of the plug housing 300 is provided with an annular protrusion 302, the annular protrusion 302 is provided with a first internal thread 303, and the inner portion of the plug housing 300 is further provided with a first abutting surface 304, when an external force is applied to make the first external thread 217 and the first internal thread 303 be connected with each other by screwing, the plug housing 300 moves axially along the head cover 210 and finally makes the first abutting surface 304 abut against the end surface of the tail cover 220, and the first abutting surface 304 is used for limiting the moving range of the plug housing 300 so as to firmly connect the two.

Referring to fig. 7, as a preferred embodiment, the interior of the head sleeve 210 is further provided with a third internal thread 218, the crimp ring 221 is provided with a second external thread 2211, the second external thread 2211 is in threaded connection with the third internal thread 218, and an end of the head sleeve 210 adjacent to the third internal thread 218 is further provided with a shoulder 219, the shoulder 219 abuts against an end surface of the tail sleeve 220, and the shoulder 219 is used for limiting the moving range of the head sleeve 210 in the tail sleeve 220. That is, when the ferrule 210 is screwed with the tail ferrule 220, an external force is applied to the ferrule 210 to rotate and move along the axial direction of the tail ferrule 220 until the shoulder 219 abuts against the end face of the tail ferrule 220, and the ferrule 210 cannot rotate and then cannot move along the axial direction, so that the ferrule 210 and the tail ferrule are matched and butted for coupling the ferrule 212 with the optical fiber.

As a preferred embodiment, the plug casing 300 is further provided with a holding portion, the holding portion extends from one end surface of the plug casing 300 along the axial direction, and the holding portion is arranged along the circumferential array of the outer peripheral surface of the plug, and the holding portion provides a holding plane for fingers of a user, so that on one hand, the external dimension of the whole product can be reduced to achieve a small dimension, and on the other hand, the user can hold the holding portion by two fingers with one hand, so that the plug main body 100 is compatible with installation or detachment in a dense space or a narrow space.

Referring to fig. 2, the plug outer sleeve 300 is further provided with a second internal thread 306, the second internal thread 306 is in threaded connection with a plug cap 500, the plug cap 500 is used for protecting the ferrule 212 in the head set 210, the front end of the plug cap 500 is further provided with a cap hole for guiding an optical fiber during pipeline construction, the plug cap 500 is further provided with a second sealing member 502 for preventing water and dust when the plug cap 500 is matched with the plug outer sleeve 300, and the plug cap 500 is connected with the plug main body 100 through a cap connecting rope 501 to prevent the plug cap 500 from falling and losing.

Correspondingly, referring to fig. 8, in this embodiment, one end of the adapter body 400 is engaged with the plug jacket 300 of the present utility model, the adapter body 400 is provided with a first groove 401 adapted to the first protrusion 301, the first groove 401 and the first protrusion 301 are engaged with each other, so as to achieve firm connection between the adapter body 400 and the plug body 100, and the other end of the adapter body 400 can be abutted with a standard connector.

Referring to fig. 4, in this embodiment, a mounting nut 402 is further provided at an end of the adapter body 400 that is abutted against the standard connector, for mounting the adapter body 400, and a sealing gasket is further provided at the mounting nut 402, for waterproof and dustproof connection between the adapter body 400 and the standard connector. The inside boss 403 that still is equipped with of adapter main part 400, boss 403 is annular, two be equipped with the clearance that can hold third sealing member 404 between the boss 403 two boss 403 play restriction third sealing member 404 in the adapter main part 400 slip range prevents that it from droing in the adapter main part 400, third sealing member 404 is used for adapter main part 400 and plug overcoat 300 when docking, makes both can waterproof dustproof.

It should be noted that, the third sealing member 404 is used to seal the tail end of the adapter body 400 and the front end of the plug housing 300, and the first sealing member 214 is used to seal the head end of the head cover 210 and the end surface of the interior of the adapter body 400 away from the tail end, so as to ensure that the connection meets the sealing waterproof requirement, thereby realizing the overall sealing waterproof and dustproof function of the product.

Referring to fig. 10-11, fig. 10-11 are comparative pictures in the prior art, in this embodiment, the plug body in the prior art mostly adopts a butt joint manner of clamping or plugging, and when the clamping portion 700 is too tiny, referring to fig. 11, the plug body is used as a plastic member, which is less reliable in the case that the adaptor 400 cannot be clamped. According to the utility model, the connecting and matching mode is changed into a threaded structure, so that the connecting strength is high, and the butt joint is firmer.

Of course, the above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present utility model should be equivalent to the above embodiments, and all the modifications, substitutions, and combinations are included in the scope of the present utility model.

Claims

1. A small-sized waterproof optical fiber plug, comprising a plug main body, wherein the plug main body comprises an insertion part, and the insertion part comprises a head sleeve piece and a tail sleeve piece, wherein the head sleeve piece is connected with the tail sleeve piece in a threaded manner, so that the tail sleeve piece can move along the axial direction of the head sleeve piece and is used for coupling a light path;

2. The small-sized waterproof optical fiber plug according to claim 1, wherein the plug jacket is provided with a first protrusion for being clamped with the adapter body, and the adapter body is provided with a first groove matched with the first protrusion.

3. The small-sized waterproof optical fiber plug according to claim 1, wherein the outer portion of the head cover is further provided with first external threads, and the inner portion of the plug outer sleeve is provided with first internal threads which are matched with the first external threads.

4. The small-sized and waterproof optical fiber plug according to claim 1, wherein a third internal thread is further arranged inside the head sleeve, and a second external thread matched with the third internal thread is arranged outside the tail sleeve.

5. The small form factor waterproof fiber optic plug of claim 1, wherein said head set further includes a first seal for providing dust and water protection.

6. The small-sized waterproof optical fiber plug according to claim 1, wherein the plug body is made of plastic material PIE for improving the precision of the plug body.

7. The small-sized waterproof optical fiber plug according to claim 5, wherein a plug cap is further arranged on the plug outer sleeve, a cap connecting rope is connected between the plug outer sleeve and the plug cap, and a second sealing piece is further arranged on the plug cap.

8. The small-sized waterproof optical fiber plug according to claim 1, wherein the plug jacket is further provided with a grip portion.

9. The small-sized and waterproof optical fiber plug according to claim 7, wherein the adapter body is further provided with a boss, and a third sealing member is arranged between the bosses.

10. The small form factor waterproof fiber optic plug according to claim 9, wherein the first, second and third seals are each fluorine gel.