WO2016143986A1 - Optical fiber plug and optical connector including same - Google Patents

Abstract

The present invention provides an optical fiber plug comprising: an accommodation part forming a ferrule accommodation space; a body integrally formed at the end of the accommodation part, having threads formed on the outer peripheral surface thereof, and including a cable lead-in hole communicating with the accommodation part; and a boot part formed on the body, wherein the boot part includes slots formed by being cut from the outer peripheral surface of the body to a core of the body, thereby providing an advantageous effect of increasing the coupling efficiency of optical cables and the convenience of an operation for connecting the optical cable to the boot part.

Description

Plugs for Fiber Optics and Optical Connectors

The present invention relates to a plug for an optical fiber and an optical connector including the same, and more particularly, to a plug for an optical fiber including a boot portion for fixing an optical cable as the screw cap is screwed and an optical connector including the same.

FTTO (Fiber To The Office) is a communication technology that uses fiber optic cables to connect from a telephone station to a communication room in a large building.

Recently, the FTTH (Fiber To The Home) system has been developed to connect various subscriber devices in the home with optical cables to provide various kinds of information including broadcasting, communication, and installed in new apartments as well as general houses.

Installing the FTTH system involves connecting optical terminal boxes installed in the communication room of the apartment and the subscriber equipment in the premises with optical cables.

The operator measures the distance between the optical terminal box and the subscriber equipment in the home, and installs an optical cable that is several meters (m) longer than the measured distance from the optical terminal box to the subscriber equipment in the home. The operator connects the optical connectors to both ends of the optical cable, and connects each of the optical connectors to the optical terminal box and each of the subscriber devices in the home.

At this time, optical connectors such as LC, ST, FC and SC optical connectors are widely used in connecting optical cables and optical terminal boxes or optical cables and subscriber devices in the home.

On the other hand, most optical connectors such as LC, ST, FC and SC optical connectors are not suitable for field installation, and there are problems that the process of connecting optical fibers in the field is not easy.

In order to solve the problems of the optical connector, there is proposed an optical connector as disclosed in Korean Patent Laid-Open Publication No. 10-2013-0123982 (Nov. 13, 2013, hereinafter referred to as the present document).

The optical connector of this document includes a stopper for fixing an optical cable. The stopper, which is arranged in two parts facing each other, is deformed when the cap is mounted, and serves to press and fix the optical cable located therebetween.

However, the optical connector including the stopper configuration has a problem in that work stability and convenience are very poor because the optical cable may be pulled down or flows down.

Accordingly, an object of the present invention is to provide a plug for an optical fiber and an optical connector including the same, which can increase the convenience of connecting the optical cable to the boot and the coupling of the optical cable. .

The problem to be solved by the present invention is not limited to the above-mentioned problem and other problems not mentioned here will be clearly understood by those skilled in the art from the following description.

The present invention for achieving the above object is a body including a receiving portion forming a ferrol receiving space, the cable inlet is formed integrally with the end of the receiving portion and the thread is formed on the outer peripheral surface and in communication with the receiving portion, Including a boot portion formed in the body, the boot portion may provide a plug for an optical fiber including a slot formed to be cut from the outer peripheral surface of the body to the core of the body.

Preferably, the boot portion may include a first grip part, a second grip part, and a third grip part which are formed in a cantilever shape on the body and are spaced apart from each other based on a circumferential direction.

Preferably, the inner circumferential surface of the first grip part may be formed from a tip to the cable inlet to form a guide part for supporting the optical cable.

Preferably, the inner circumferential surface of the second grip part and the inner circumferential surface of the third grip part may include a stepped portion protruding inward in the radial direction.

Preferably, the slot may be formed between the second grip part and the third grip part.

Preferably, both sidewalls of the slot may be formed to be inclined.

Preferably, both side walls of the slot may be formed so that the horizontal distance increases as the radially outward direction.

Preferably, the slot may be disposed opposite the guide portion.

Preferably, the guide portion may be inclined downward toward the tip.

Another object of the present invention is to provide an optical connecting portion including a ferrule, a receiving portion forming a ferrule receiving space and a cable inlet integrally formed at an end of the receiving portion and having a thread formed on an outer circumferential surface thereof and communicating with the receiving portion. And a boot portion formed on the body, wherein the boot portion includes a plug for an optical fiber including a slot formed from an outer circumferential surface of the body to a core of the body, a housing coupled to the body, and the boot. It is possible to provide an optical connector including a screw cap fastened to the part.

Preferably, as the optical connector, the boot part may include a first grip part, a second grip part, and a third grip part which are formed in a cantilever shape on the body and are spaced apart based on the circumferential direction.

Preferably, as an optical connector, an inner circumferential surface of the first grip part may be formed from a tip to the cable inlet to guide the support to support the optical cable.

Preferably, as an optical connector, an inner circumferential surface of the second grip part and an inner circumferential surface of the third grip part may include a stepped portion protruding inward in the radial direction.

Preferably, as an optical connector, the slot may be formed between the second grip part and the third grip part.

Preferably, as an optical connector, both sidewalls of the slot may be formed to be inclined.

Preferably, as the optical connector, both sidewalls of the slot may be formed such that the horizontal distance increases as the radially outward direction.

Preferably, as an optical connector, the slot may be disposed opposite the guide portion.

Preferably, as the optical connector, the guide portion may be formed to be inclined downward toward the tip.

According to an embodiment of the present invention, by having a grip part consisting of three grip parts, the guide part for supporting the optical cable in the lower part of the three grip parts, the convenience of the operation of connecting the optical cable to the boot and the optical cable It provides an advantageous effect of increasing the bondability of.

1 is a view showing an optical connector according to an embodiment of the present invention,

2 shows an optical fiber plug,

3 is a view showing a boot unit;

4 is a side cross-sectional view of an optical fiber plug,

5 is a view illustrating an arrangement of three grip parts;

6 is a view illustrating a grip part for supporting an optical cable.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. The objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments in conjunction with the accompanying drawings. And the terms or words used in this specification and utility model registration claims should not be construed as being limited to their ordinary or dictionary meanings, and the inventors shall appropriately introduce the concept of terms in order to best explain their own design. Based on the principle that it can be defined in a simple manner, it should be interpreted as meanings and concepts corresponding to the technical idea of the present invention. And in describing the present invention, detailed descriptions of related well-known techniques that may unnecessarily obscure the subject matter of the present invention will be omitted.

Terms including ordinal numbers, such as second and first, may be used to describe various components, but the components are not limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the second component may be referred to as the first component, and similarly, the first component may also be referred to as the second component. The term and / or includes a combination of a plurality of related items or any item of a plurality of related items.

1 is a view showing an optical connector according to an embodiment of the present invention. As such, FIG. 1 clearly shows only the main features in order to conceptually clearly understand the present invention, and as a result, various modifications of the drawings are expected, and the scope of the present invention is limited by the specific shapes shown in the drawings. There is no.

Referring to FIG. 1, an optical connector according to a preferred embodiment of the present invention may include an optical fiber plug 10, an optical connector 20, a housing 30, and a screw cap 40.

An optical connection portion 20 is located inside the optical fiber plug 10, a boot portion 30 is coupled to the front end of the optical fiber plug 10, and a screw cap 40 is attached to the rear end of the optical fiber plug 10. Can be combined. The boot part 30 receives the plug 10 for the optical fiber inside to protect the optical connector 20 included in the plug 10 for the optical fiber.

The optical fiber plug 10 may include a receiver 210 and a boot 220. Here, the accommodation unit 210 and the boot unit 220 may be described separately according to the shape and functional characteristics, it may be one means connected to each other up and down.

 The accommodating part 210 forms an accommodating space into which the optical connecting part 20 is inserted. The body 210 may be formed in an open shape.

The optical connector 20 is inserted into the optical fiber plug 10 to serve to connect the optical fiber of the ferrule and the optical fiber of the optical cable. The optical contact attachment portion 20 may be composed of an optical connection housing 21, an optical connection housing cover 22, and an optical connection housing holder 23. The optical connection housing 21 is formed with a ferrule inserting portion 21a into which a ferrule is inserted and fixed to the front side, and an optical fiber inserting portion 21b into which an optical fiber of an optical cable is inserted.

2 is a view showing an optical fiber plug.

Referring to FIG. 2, the boot unit 220 may include a body 221, a first grip part 222, a second grip part 223, and a third grip part 224.

Body 221 is coupled to the receiving portion 210, the thread is formed on the outer peripheral surface. Body 221 is a screw cap 40 is screwed.

The first grip part 222, the second grip part 223, and the third grip part 224 are formed to be elastically deformable in the form of a cantilever in the body 221. The first grip part 222, the second grip part 223, and the third grip part 224 may be spaced apart at regular intervals based on the circumferential direction. The first grip part 222, the second grip part 223, and the third grip part 224 serve to fix the optical cable inserted and retracted by being screwed into the body 221 to the screw cap 40. Do it.

The outer surfaces of the first grip part 222, the second grip part 223, and the third grip part 224 may be formed in a curved surface to be easily inserted into the screw cap 40, and have a tapered shape. It can be formed to have.

3 is a view showing a boot portion, FIG. 4 is a side cross-sectional view of the optical fiber plug, FIG. 5 is a view showing the arrangement of three grip parts, and FIG. 6 is a view showing a grip part for supporting an optical cable. .

3 to 6, a cable inlet 211 communicating with an inner space of the accommodation part 100 may be formed in the body 221. The first grip part 222, the second grip part 223, and the third grip part 224 may be disposed around the cable inlet 211 when viewed from the front. And, it serves to prevent falling out of the plug 10 for the optical fiber.

As shown in FIG. 5, the first grip part 222, the second grip part 223, and the third grip part 224 are based on the virtual reference line CL passing through the center of the cable inlet 211. It can be arranged symmetrically.

The second grip part 223 and the third grip part 224 may be disposed on the upper portion of the first grip part 222, respectively. In this case, the first grip part 222 may be disposed below the cable inlet 211 when viewed from the front such that the center of the width is positioned at the reference line CL. Therefore, as shown in FIG. 6, the first grip part 222 supports the optical cable C so that the optical cable connected to the cable inlet 211 falls down due to its own weight or is pulled out of the plug 10 for the optical fiber. You can prevent it.

In particular, the first grip part 222 has a guide portion 225 supporting the lower end of the optical cable on the inner peripheral surface.

The guide part 225 supports the lower surface of the optical cable and is formed on the inner circumferential surface of the first grip part 222, and may be formed from the front end to the cable inlet 211 as shown in FIG. 4.

The guide part 225 may be inclined downward from the cable inlet 211 to the end of the first grip part 222. This is for guiding the optical cable inserted into the optical fiber plug 10 to the cable inlet 211.

Meanwhile, the stepped portions 226 may be formed on the inner circumferential surfaces of the second grip part 223 and the third grip part 224, respectively. The stepped portion 226 contacts the cladding portion or cladding layer of the optical cable to guide the optical cable so that only the core portion thereof can be connected to the cable inlet 211.

The second grip part 223 may be disposed above the left side of the first grip part 222, and the second grip part 223 may be disposed above the right side of the first grip part 222. The second grip part 223 and the third grip part 224 may be formed as part of the slot 230.

The slot 230 is formed to be cut from the outer circumferential surface of the body 221 to the core of the body 221 to form an upper end of the body 221. The slot 230 is connected to the spaced space between the second grip part 223 and the third grip part 224 to induce easier insertion and fixing when the rectangular optical cable is inserted.

The slot 230 may be disposed to face the guide part 225 of the first grip part 222. Both sidewalls of the slot 230 may be inclined. That is, the horizontal distance W between both sidewalls of the slot 230 may be formed to increase outwardly based on the radial direction.

When the screw cap 40 is rotationally fastened to the boot part 220, the first grip part 222, the second grip part 223, and the third grip part 224 are retracted to fix the optical cable. In this case, the guide part 225 of the first grip part 222 may support the lower end of the optical cable to guide the cable inlet 211, thereby increasing work convenience when connecting the optical cable. In addition, since the second grip part 223 and the first grip part 222 are symmetrically disposed on the upper left side and the upper right side of the first grip part 222, the optical cable entering the optical fiber plug 10 is connected. It can be fixed stably and increase the convenience of work.

The optical connector according to an exemplary embodiment of the present invention has been described in detail with reference to the accompanying drawings.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention belongs may make various modifications, changes, and substitutions without departing from the essential characteristics of the present invention. will be. Accordingly, the embodiments disclosed in the present invention and the accompanying drawings are not intended to limit the technical spirit of the present invention, but are intended to be described, and the scope of the technical idea of the present invention is not limited by the embodiments and the accompanying drawings. . The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas falling within the scope of the present invention should be interpreted as being included in the scope of the present invention.

<Description of the code>

10: plug for optical fiber, 20: optical connection part, 30: housing, 40: screw cap, 210: receiving part, 220: boot part, 221: body, 222: first grip part, 223: second grip part, 224: 3rd grip part, 225: guide part, 230: slot

Claims (18)

Receiving portion forming a ferrol receiving space; A body including a cable inlet integrally formed at an end of the accommodating part and having a screw thread formed on an outer circumferential surface thereof, and communicating with the accommodating part, and a boot part formed on the body, The boot portion plug for an optical fiber comprising a slot formed to cut from the outer peripheral surface of the body to the core of the body. According to claim 1, The boot section And a first grip part, a second grip part, and a third grip part which are formed in a cantilever shape on the body and are spaced apart from each other based on a circumferential direction. The method of claim 2, The inner circumferential surface of the first grip part is a plug for an optical fiber which is formed from a tip to the cable inlet and is formed as a guide part for supporting an optical cable. The method of claim 3, wherein The inner circumferential surface of the second grip part and the inner circumferential surface of the third grip part include a stepped portion protruding radially inward. The method of claim 4, wherein The slot is an optical fiber plug formed between the second grip part and the third grip part. According to claim 1, Both side walls of the slot is inclined plug for the optical fiber. The method of claim 6, Both side walls of the slot is formed so that the horizontal distance increases as the radially outward. The method of claim 7, wherein The slot is a plug for an optical fiber disposed opposite the guide portion. The method of claim 3, wherein The guide portion plug for the optical fiber is formed to be inclined downward toward the tip. An optical connection including a ferrule; A boot including a boot formed on the body and a body including an accommodating part forming a ferrule accommodating space and an end portion of the accommodating part and having a screw thread formed on an outer circumferential surface thereof and communicating with the accommodating part; The plug includes an optical fiber plug including a slot formed from an outer circumferential surface of the body to a core of the body; A housing coupled to the body; and Screw cap fastened to the boot portion Optical connector comprising a. The method of claim 10, The boot section An optical connector including a first grip part, a second grip part, and a third grip part formed in the body in a cantilever shape and spaced apart from each other based on a circumferential direction. The method of claim 11, wherein The inner circumferential surface of the first grip part is formed from a tip to the cable inlet port is formed as a guide portion for supporting the optical cable. The method of claim 12, And an inner circumferential surface of the second grip part and an inner circumferential surface of the third grip part include a stepped portion protruding radially inward. The method of claim 13, And the slot is formed between the second grip part and the third grip part. The method of claim 10, Both sidewalls of the slot is formed to be inclined optical connector. The method of claim 15, Both side walls of the slot are formed so that the horizontal distance increases as the radial outward. The method of claim 16, The slot is an optical connector disposed opposite the guide portion. The method of claim 12, The guide portion is formed to be inclined downward toward the tip of the optical connector.

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