KR20120020632A - Optical connector - Google Patents

Abstract

PURPOSE: An optical connector is provided to prevent optical loss by steadily fixing a connected optical fiber core as well as directly connecting a target optical fiber core. CONSTITUTION: An optical connector comprises a housing(110), a first ferrule(120), a bracket member(140), a core fixing part(180), a second ferrule(130), and a sleeve(160). A first optical fiber core is arranged in the first ferrule and supports one side of the housing. A second optical fiber core is arranged in the second ferrule and connected to the first optical fiber core. The sleeve surrounds the connected end part of the first ferrule and the second ferrule. The bracket member is fixed to the housing to surround the first ferrule, the second ferrule, and the sleeve. The core fixing part is mounted on the bracket member and fixes the second optical fiber core.

Description

Optical connector {OPTICAL CONNECTOR}

The present invention relates to an optical connector, and more particularly, to an optical connector that can be interconnected while minimizing optical loss when the optical fiber is assembled in the field.

In general, the optical connector aligns the ferrule in which the core of the optical fiber is inserted in the factory so that the optical fiber is cut to fit the optical center in the factory, and minimizes the optical loss through the epoxy bonding and the end face polishing process. Attached fiber connectors have been used to lay finished products called patch cords. For example, LC, ST, FC and SC optical connectors are used.

Since patch cords are manufactured at the factory in the form of finished products with a certain length according to the specified parameters, the connection between the optical cables in optical distribution boards, optical terminal boxes, optical intermediate switching boxes, etc. The connection between the optical distribution panel and the optical transmission device and the connection between the optical transmission devices faced limitations of length.

Accordingly, the optical connectors provided on both sides of the patch cord are converted into an assembly type so that they can be easily assembled in the field, and a patch cord having a desired length can be obtained.

Korean Patent Laid-Open Publication No. 2009-0065485 discloses a field connectable fiber optic connector having a splice element.

The disclosed connector includes a housing configured to mate with a receptacle, a collar body disposed within the housing, the collar body comprising a fiber stub disposed within a first end portion of the collar body, the fiber stub comprising a first optical fiber, The first optical fiber further includes a mechanical splice device mounted in the ferrule and having a first end and a second end adjacent to the end face of the ferrule, the collar body disposed in the splice device receiving portion of the collar body, and mechanical splice The rice device clamps the fiber jacket to hold the collar body in the housing, the collar body configured to splice the second end of the fiber stub on the second optical fiber, and to clamp the jacket portion surrounding the portion of the second optical fiber in operation. A backbone comprising a portion and a fiber jacket clam of the backbone, which may be attached to a portion of the backbone and when attached to the backbone And a boot of operating parts.

The optical connector structured as described above can be assembled in the field, but the mechanical slice device has a structure for clamping the optical core by using a fastening force, so that the coupling force is relatively weak and the coupling is not smoothly performed.

The prior art of the optical connector adapted to be assembled is disclosed in Korean Patent Publication No. 10-0507543.

The optical connector according to the prior art has a housing, a plug movably inserted and fixed to the housing, a core aligning member movably inserted into the plug, a fixing member wrapped around a part of the core aligning member and inserted into and fixed to the plug, and fixed. A spring inserted into the member to support the core alignment member by an elastic force, a protective cover surrounding and sealing the free end of the fixing member, and an optical fiber inserted into the fixing member to be fixed to be engaged with the core alignment member and drawn from the protective cover. The optical fiber connecting member for guiding to the alignment member, and a fastening member for fastening to the optical fiber connecting member by tightening the optical fiber introduced from the protective cover while being coupled to or separated from the optical fiber connecting member in the form of a clip.

In the optical connector, since the core of the optical fiber inserted into the optical fiber connection member is fitted to the core alignment member without a separate guide means, it is difficult to accurately fit the core of the optical fiber to the core insertion hole of the core alignment member. That is, it was very difficult to accurately insert the core into the core insertion hole having the diameter corresponding to the diameter of the core having a diameter of approximately 125 μm without a separate guide means. Thus, there is a problem in that the core is not easily connected in the core insertion hole of the core alignment member.

The present invention has been made to solve the above problems, and an object of the present invention is to provide an optical connector that can be easily connected to each other because ferrules of two optical fibers that are connected to each other during construction of the optical connector can be precisely connected to each other.

An optical connector according to the present invention for achieving the above object is a housing, a first ferrule which one side is supported on the housing, the first optical fiber core is installed therein, and the cross section and cross section of the first ferrule A second ferrule installed to abut the second optical fiber core connected to the first optical fiber core, a sleeve installed to surround an end portion of the first ferrule and the second ferrule connected to the second ferrule; And a bracket member fixed to the housing so as to surround the second ferrule and the sleeve, and the second optical fiber core mounted on the bracket member so that the second optical fiber core can easily maintain a connection state with the first optical fiber core. It is provided with a core fixing part for fixing.

The core fixing part has a supporting groove drawn toward the center portion from the outer circumferential surface, and a V groove is formed along the longitudinal direction to support the optical fiber core in the supporting groove, and communicates with the second ferrule. And a coupling member coupled to the splice member so as to be inserted into the support groove to fix the second optical fiber core seated on the v groove, wherein the coupling member protrudes downward from the lower end. The hook portion is provided with a locking step protruding outward as the predetermined length extends upward, and the splice member is formed to extend in the vertical direction to penetrate the ring portion, and the fixing hole can be caught at the lower end. It is preferable that this is formed.

In addition, the splice member is formed with a cable gripping portion extending a predetermined length to grip the outer circumferential surface of the optical fiber cable is not peeled off so as to grip the optical fiber cable including the second optical fiber core, the core fixing portion is It is preferable to further include a holder ring which is installed to surround the outside of the gripping portion to fix the optical fiber cable held by the cable gripping portion from flowing.

The optical connector according to the present invention directly connects the target optical fiber core to be connected, and stably fixes the connected optical fiber core, thereby making it easy and accurate to connect the optical fiber core, thereby preventing the optical loss from occurring.

1 is a perspective view showing a first embodiment of an optical connector according to the present invention;
2 is an exploded perspective view of FIG. 1;
3 is a side cross-sectional view of FIG.
4 is a partial excerpt perspective view illustrating the core fixing part of FIG. 1;
5 is a cross-sectional view of the core fixing part of FIG.
6 is an exploded perspective view showing a second embodiment of the optical connector according to the present invention.

Hereinafter, an optical connector according to the present invention will be described in more detail with reference to the accompanying drawings.

1 to 5 show a first embodiment of an optical connector 100 according to the invention.

Referring to the drawings, the optical connector 100 of the present embodiment includes a housing 110, a first ferrule 120 having one side supported inside the housing 110 and having a first optical fiber core embedded therein. A bracket member 140 detachably fastened to one side of the housing 110 and having a through space therein, and supported inside the bracket member 140 so as to extend through the bracket member and the first optical fiber core. A core fixing part 180 for fixing the second optical fiber core 131 connected to the second optical fiber core 131, extending from the core fixing part 180 toward the first ferrule 120, and having the second optical fiber core 131 therein. The first and second optical fibers at the connecting portion of the second ferrule 130 having the insertion hole formed therein to be inserted and the first and second ferrules 120 and 130 wrapped around the first and second ferrules 120 and 130. A sleeve 160 to allow connection of the core to be made, and to surround the sleeve 160 And a resilient member (170) value.

The housing 110 is penetrated in the front and rear direction, and a through hole 111 having a predetermined diameter is formed at one inner side thereof so that the annular support member 121 formed on the first ferrule 120 can be supported. The through hole 111 is relatively smaller in diameter than the outer diameter of the annular support member 121 so that the annular support member 121 cannot pass therethrough, and fastening the bracket member 140 to both sides of the housing 110. Fastening hole 112 is formed to penetrate the outer peripheral surface and the inner peripheral surface.

The bracket member 140 is connected to the front of the housing 110 and is formed by combining two first and second fastening bodies 141 and 142 which are separated from each other. The bracket member 140 has a space formed therein so as to pass through the front and rear directions, and one end is coupled to the housing 110, and the spaces are connected to communicate with each other. One end of the bracket member 140 is provided with a fastening protrusion 143 to be fitted into the fastening hole 112 formed in the housing 110, the fastening protrusion 143 is the first, second fastening body ( Is formed to protrude outward from the outer circumferential surface of the 141, 142, the fastening protrusion 143 penetrates the fastening hole 112 in a state where one end of the first and second fastening bodies 141, 142 is inserted into the housing 110. The bracket member 140 is connected to the housing 110 by protruding to the outside.

The other end of the first and second fastening bodies 141 and 142 is also provided with a screw fastening portion 144 having a cylindrical shape and being threaded on the outer circumferential surface when coupled to each other so as to be coupled to the cover member 150 to be described later. The cover member 150 is in the form of a lid formed with a screw thread on the inner circumferential surface, the cover member 150 to the first, second fastening body (the other end of the first and second fastening bodies 141, 142 contact each other) By screwing the other end of the 141, 142, that is, the screw fastening portion 144, it is possible to maintain a state in which the first and second fastening members are coupled.

The first ferrule 120 has a first optical fiber core to be connected to extend through the inside thereof, and an end portion of the first optical fiber core is exposed to the outside through a cross section of the first ferrule 120. The first ferrule 120 is provided with an annular support member 121 as described above, the annular support member is formed in a relatively larger diameter than the through hole 111, so the annular support member is formed inside the housing 110. Supported.

The second optical fiber core 131, which is connected to the first optical fiber core, is supported by the second ferrule 130. The first and second ferrules 120 and 130 are in contact with each other, and the first optical fiber core and the second optical fiber core at the ends thereof. The optical fiber cores 131 may be interconnected with each other. The second ferrule 130 extends from the core fixing unit 180 described later.

The core fixing part 180 fixes the second optical fiber core 131 to prevent the second optical fiber core 131 from being separated from the first optical fiber core by an external force, and to prevent a poor connection state. The core fixing part 180 includes a splice member 181, a coupling member 186 and a holder ring 151 coupled to the splice member 181.

The splice member 181 is formed with a hole to insert and discharge the second optical fiber core 131 on one side and the other side, respectively, and the second ferrule 130 is connected to the other end. As the hole formed in one side of the splice member 181, that is, the core entry hole 182, the inner diameter becomes narrower as the second optical fiber core 131 proceeds along the direction from the outside to the inside, The operator can easily insert the second optical fiber core 131 into the splice member 181. When the optical fiber cable is inserted into one side of the splice member 181, the cable gripping portion 188 extends a predetermined length so that the optical fiber cable is not stripped. The cable gripping portion 188 is formed so that the inner diameter corresponds to the outer diameter of the optical fiber cable, so that the stripped optical fiber core passes through the core entry hole 182 and enters the splice member 181. This unstripped cable is gripped by the cable gripping portion 188. The cable gripping portion 188 has a collet structure in which the cable gripping portion 188 is divided so as to be easily inserted into the cable gripping portion.

The splice member 181 has a supporting groove 183 drawn from the outer circumferential surface to the center portion, and the supporting groove 183 extends in the longitudinal direction so that the second optical fiber core 131 can be supported. V-groove 184 is formed. The second optical fiber core 131 enters through the core inlet hole 182 and then extends along the vve and through the core inlet hole formed on the other side of the splice member 181. It will go inside.

The coupling member 186 is coupled to the support groove 183 of the splice member 181 to fix the second optical fiber core 131 supported by the V groove 184 so as not to flow. The coupling member 186 is configured to press and fix the second optical fiber core 131 supported by the v groove 184 downward when the coupling member 186 is coupled with the splice member 181, and protrudes downward on both sides. The ring portion 187 is formed. The splice member 181 is provided with fixing holes 185 penetrating downward on both sides of the v groove 184, and the ring portion 187 protrudes downward through the fixing holes 185 and the ring. The locking jaw 187a formed at the lower end of the portion 187 is caught at the lower end of the splice member 181 to prevent the coupling member 186 from being separated from the splice member 181. .

The holder ring 151 is installed to surround the cable gripping portion 188 and is installed so as to surround the cable gripping portion 188 so that the cable gripping portion of the holder ring 151 is wrapped around the cable gripping portion 188. This prevents the connection from being bad.

The sleeve 160 is to interconnect and fix the first and second ferrules 120 and 130, and to cover both ends of the first and second ferrules 120 and 130, which are in contact with each other in the bracket member 140. A hollow having an inner diameter corresponding to the outer diameter of the first and second ferrules 120 and 130 is formed. Therefore, the contact state of the first and second ferrules 120 and 130 can be maintained without misalignment by the sleeve 160, and the connection state of the first and second optical fiber cores can be maintained well.

The elastic member 170 is installed to surround the first and second ferrules 120 and 130 and the sleeve 160, and both ends thereof are supported by the annular support member 121 and the core fixing part 180, respectively. The elastic member 170 elastically biases the outer side such that the annular support member is in close contact with the housing 110 even when a compressive force is generated by an external force.

The optical connector 100 according to the present invention as described above, the first and second ferrules 120 and 130 in which the first and second optical fiber cores to be connected are embedded in the sleeve 160 installed inside the bracket member 140. ) Is inserted into the ferrule and the ferrule, and the core fixing part 180 is provided to fix the second optical fiber core so that the connection state of the first and second optical fiber cores can be maintained well. .

6 shows a second embodiment of an optical connector 200 according to the present invention.

Referring to the drawings, the optical connector 200 of the present embodiment includes a housing 110, a bracket member 140, a first ferrule 120, a sleeve 160, an elastic member 170, a cover member 150, and the like. Basic components are the same as the embodiment. However, in the optical connector 200 of the present embodiment, unlike the first embodiment, the core fixing part 190 is formed such that the second ferrule 195 is separable from the splice member 191, and the second optical fiber in front of the optical connector 200 is provided. A core guide portion 193 for guiding the core to be easily entered is detachably coupled to the splice member 191.

Since the remaining components of the present embodiment have the same function as the components of the first embodiment, the same reference numerals are used and detailed description thereof will be omitted.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

100; Optical connector
110; housing
120; First ferrule
130; Second ferrule
140; Bracket member
150; Cover member
151; Holder ring
160; sleeve
170; Elastic member
180; Core Fixation
181; Splice member 186; [0034]

Claims (3)

A housing;
A first ferrule adapted to support one side of the housing and having a first optical fiber core installed therein;
A second ferrule installed so that a cross section of the first ferrule is in contact with a cross section and having a second optical fiber core connected to the first optical fiber core therein;
A sleeve installed to surround the connected ends of the first ferrule and the second ferrule;
A bracket member fixed to the housing so as to surround the first and second ferrules and the sleeve;
And a core fixing part mounted to the bracket member and fixing the second optical fiber core so that the second optical fiber core can easily maintain a connection state with the first optical fiber core. The method of claim 1,
The core fixing part has a supporting groove drawn toward the center portion from the outer circumferential surface, and a V groove is formed along the longitudinal direction to support the optical fiber core in the supporting groove, and communicates with the second ferrule. The splice member,
A coupling member coupled to the splice member to be inserted into the support groove to fix the second optical fiber core seated on the v groove,
The coupling member protrudes downward and has a hook portion provided with a latching jaw that protrudes outward as a predetermined length extends upward from a lower end thereof. Optical connector, characterized in that the fixing hole is formed so that the locking step is caught on the bottom. The method of claim 2,
The splice member has a cable gripping portion extending a predetermined length to grip the outer circumferential surface of the optical fiber cable is not stripped so as to hold the optical fiber cable including the second optical fiber core,
The core fixing part is installed to surround the outside of the cable gripping portion optical connector characterized in that it further comprises a holder ring for fixing the optical fiber cable held in the cable gripping portion to prevent flow.

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