KR20090107278A - Clamp type optical connector for assembling in the field - Google Patents

Abstract

PURPOSE: A clamp type optical connector assembled in a field is provided to prevent the loss of the light by arranging a core accurately. CONSTITUTION: A first unit(100) includes a housing, a plug, and a fixing unit. The plug is rotatably inserted into the housing. The fixing unit and a core of an optical fiber are inserted into a ferrule unit(200). An optical fiber fastening unit is installed in an end of the ferrule unit and fixes the optical fiber by pressing the outer surface of the optical fiber with the core. A second unit(300) is combined in the fixing unit and fixes the ferrule unit and the optical fiber fastening unit.

Description

Field assembly clamp type optical connector {CLAMP TYPE OPTICAL CONNECTOR FOR ASSEMBLING IN THE FIELD}

The present invention relates to an optical connector, and more particularly, to a field-assembled clamp type optical connector that can be assembled without the optical loss of the connection in the workplace.

In general, the optical connector aligns the ferrule in which the core of the optical fiber is inserted so that the operator can fit the optical center in the factory to minimize the optical loss through the epoxy bonding and the end face polishing process. By attaching an optical connector, a finished product called a patch cord has been used for laying a fiber.

Since general patch cords are manufactured at the factory in the form of finished products having a certain length according to the specified parameters, the connection between optical cables in optical distribution boards, optical terminal boxes, and optical intermediate switching boxes requiring the connection and disconnection between optical transmission equipment and optical fiber cables. In addition, there are limitations in length in the connection between the optical distribution panel and the optical transmission device and the connection between the optical transmission devices.

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.

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

The optical connector according to the prior art has a housing, a plug movably inserted into 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.

The optical connector according to the related art configured as described above includes optical fibers drawn out of the protective cover in a state where the housing, the plug, the core alignment member, the fixing member, the optical fiber connecting member, and the fastening member are assembled in advance. Inserted in sequence so as to be connected to the core of the optical fiber previously inserted into the core alignment member. The optical fiber drawn out of the protective cover is fixed to the optical fiber connecting member by being fastened to the optical fiber connecting member in a state in which the optical fiber is clamped by the fastening member. Then, the assembly of the optical connector is completed by combining the housing and the protective cover.

However, since the core of the optical fiber introduced 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.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a field-assembled clamp type optical connector that can easily work while the core is correctly connected when assembling the optical connector.

Field-mounted clamp type optical connector of the present invention for achieving the above object is a first having a housing, a plug movably inserted into the housing, and a fixing member inserted into the plug and penetrated therein; A unit; A ferrule unit in which a part of the fixing member is inserted and the core of the optical fiber is inserted; Optical fiber tightening means installed at an end of the ferrule unit to press the outer surface of the optical fiber having a core inserted into the ferrule unit to fix the optical fiber to the ferrol unit; And a second unit coupled to the fixing member to fix the ferrule unit and the optical fiber fastening means.

The optical fiber tightening means is penetrated through the inside, the end of the ferrol unit is inserted into one side ferrol support tube for supporting the ferrol unit; An inner penetrates through and screwed to the ferrol support tube, and the optical fiber drawn out from the second unit to guide the ferrol support tube, and plastically deformed by the external pressure to pressurize and fix the optical fiber.

The ferrule unit comprises: a first ferrule installed to elastically slide in the fixing member and having a first core inserted therein; A second ferrule inserted into an end of the ferrule support tube, into which a second core which is a core of the optical fiber drawn out from the second unit is inserted; A sleeve for guiding the first and second ferrules through a central portion of the first and second ferrules so that the first and second ferrules are connected to each other so as to be in close contact with each other.

The present invention guides and connects the first and second ferrules into which the core of the optical fiber is inserted by a sleeve, so that the cores can be accurately aligned while the assembling of the optical connector is simplified, thereby reducing the optical loss generated when the cores are connected. There is an effect that can be prevented.

Hereinafter, with reference to the accompanying drawings will be described in detail an embodiment of the present invention.

1 to 3 show the structure of the field-assembled clamp type optical connector according to the present embodiment.

1 to 3, the present embodiment includes a first unit 100, a ferrol unit 200 having an end fitted to the first unit and a core of an optical fiber inserted therein, and a free end of the ferrol unit. A second unit 300 fixed in position and coupled to the first unit, and the optical fiber fixing means 400 is provided in the second unit to fix the optical fiber connected to the ferrole unit to the ferrole unit.

The first unit 100 is composed of a housing 110, a plug 120 to be inserted into and fixed to the housing, and a fixing member 130 inserted into and fixed to the plug.

The ferrol unit 200 is installed to elastically slide in the fixing member 130 of the first unit 100, the first ferrule 210, the first core (C1) is inserted into the second unit 300, The second ferrule 220 into which the end is coupled and the second core C2, which is the core of the optical fiber drawn out from the second unit 300, is inserted, and the sleeve 230 guides the first and second ferrules to be in close contact with each other. Consists of

The second unit 300 is fixed to the position of the ferrol unit 200 and coupled to the fixing member 130 of the first unit 100, the protective cover 310 is introduced into the housing 110, and the protective cover is a ferrol unit Compression ring 320 is fixed to the optical fiber fixed to (200).

The optical fiber fixing means 400 is penetrated into the ferrule support tube 410 and the ferrule support tube 410 to support the ferrol unit 200 by penetrating the inside thereof and having an end portion of the ferrol unit 200 fitted on one side thereof. The pressure fixing tube 420 is fixed to the optical fiber drawn out from the unit 300 is connected to the ferrol unit 200.

The housing 110 has a central portion penetrating in the longitudinal direction so that the plug 120 is fitted therein, and outer surfaces of the housing 110 penetrate from the inside to the outside and extend a predetermined length in the longitudinal direction of the housing 110. It is provided opposite.

 The plug 120 penetrates a center portion so that a part of the ferrule unit 200 is fitted, and both sides of the plug 120 are inserted into the first fixing holes 111 of the housing 110 to fix the first fixing member 120 when the plug 120 is moved. The first protrusion member 121 guided to the hole 111 protrudes. In addition, a second fixing hole 122 penetrating outward from the inside of the plug 120 is formed at an end spaced from the first protrusion member 121.

The fixing member 130 has a central portion penetrating through the ferrol unit 200, and a second protrusion member 131 coupled to the second fixing hole 122 of the plug 120 is formed at an outer circumferential surface thereof. In addition, a coupling groove 132 for coupling the protective cover 310 is formed on the outer surface spaced apart from the second protrusion member 131.

In the first and second ferrules 210 and 220, a core insertion hole H through which the core of the optical fiber is inserted and fixed is formed in the center thereof. The core insertion holes H of the first and second ferrules are centered on the first and second ferrules 210 and 220 so that the first and second ferrules 210 and 220 can communicate with each other when the first and second ferrules 210 and 220 are slid by the sleeve 230. Penetrates at the same position.

The first ferrule 210 is inserted into the first core (C1) to be precisely cut and polished at the factory, not the optical fiber connection site.

In addition, the first ferrule 210 is installed to slide by the elastic force in the fixing member 130. That is, a rib portion 123 protruding in an annular shape is provided on the inner circumferential surface of the plug 120, and the flange member (not shown) extends the outer diameter of the first ferrule 210 and is caught by the rib portion 123. 211) is fitted. Thus, the first ferrule 210 is prevented from being separated from the plug 120. In addition, an elastic member 500 is provided to support the flange member 211 by an elastic force by being caught by one side of the penetrating inner side of the fixing member 130. Therefore, the first ferrule 210 is not separated from the plug 120 by the rib part 123 of the plug 120 but is slid in the fixing member 130 by the elastic force of the elastic member 500.

The elastic member 500 uses a circular spring so that the first ferrule 210 penetrates.

The second ferrule 220 is inserted into the second core (C2), which is the core of the optical fiber drawn out from the protective cover 310, is precisely cut and polished at the factory, or cut and polished by the cutting tool at the optical fiber connection site.

The sleeve 230 is formed in a cylindrical shape through which the center part is penetrated so that the first and second ferrules 210 and 220 are inserted and guided, and is inserted into the fixing member 130. The penetrated inner diameter of the sleeve 230 is formed corresponding to the outer diameters of the first and second ferrules 210 and 220. In addition, the slit 231 is formed in the sleeve 230 in the longitudinal direction. This facilitates the fitting of the first and second ferrules 210 and 220 by extending the inner diameter of the sleeve 230 within the elastic deformation limit.

The protective cover 310 has a central portion penetrated so that the optical fiber is fitted, and a built-in space is formed in the central portion so as to be embedded in the optical fiber fixing means 400, and the inner side of the protective cover 310 is coupled to the coupling groove 132 of the fixing member 130. Coupling protrusion 311 protrudes.

The compression ring 320 is formed of a circular ring, and when subjected to an external pressure in a state of being fitted to the protective cover 310, plastic deformation is compressed to the protective cover 310. The protective cover 310 is fixed to the optical fiber by pressing.

The ferrule support tube 410 is fitted with a second ferrule 220 is fitted on one side, the other side is formed with a screw thread so that the pressure fixing tube 420 is screwed. The central portion penetrates through the optical fiber so that the core of the optical fiber can be inserted into the core insertion hole H of the second ferrule 220.

The pressure fixing tube 420 is formed in a cylindrical shape through which the optical fiber is inserted, the screw thread is formed on one side of the inner surface is screwed to the ferrule support tube 410.

The other side of the pressure fixing tube 420 is pressed by an external force and plastically deformed, and compressed to the optical fiber, thereby fixing the optical fiber to the pressure fixing tube 420. That is, the pressure fixing tube 420 is screwed to the ferrule support tube 410, the optical fiber is fixed by the pressure fixing tube 420 in a state connected to the second ferrule 220 supported by the ferrule support tube 410. .

Reference numeral P, which is not described, is a plastically deformed portion by applying external force to the pressure fixing tube 420.

Hereinafter, the operation and effect of the present embodiment will be described.

According to the present embodiment, the first ferrule 210, which is the ferrule unit 200, and the sleeve 230 are integrally assembled to the first unit 100, and the second ferrule which is the ferrule unit 200 is assembled to the second unit 300. 220, the ferrule support tube 410 and the pressure fixing tube 420, which are optical fiber fixing means 400, are integrally assembled.

That is, the first ferrule 210 is slidably coupled in the fixing member 130, and the sleeve 230 is coupled to the first ferrule 210 so that a part of the first ferrule 210 is inserted.

The second unit 300 is a compression ring 320, the protective cover 310, the pressure fixing tube 420, the ferrule support tube 410 is sequentially inserted into the optical fiber, the second core (C2) that is the core of the optical fiber is It is inserted into the second ferrule 220. Then, the second ferrule 220 is fitted into the ferrule support tube 410, and the pressure fixing tube 420 is screwed to the ferrule support tube 410.

One side of the pressure fixing tube 420 is pressed to the optical fiber connected to the second ferrule 220. Thus, the optical fiber connected to the second ferrule 220 is fixed integrally with the second ferrule 220, the ferrule support tube 410, and the pressure fixing tube 420.

The protective cover 310 is moved to the second ferrule 220 side on the optical fiber so that the second ferrule 220, the ferrule support tube 410, the pressure fixing tube 420 is located in the interior space, by pressing the compression ring 320 The protective cover 310 is fixed to the optical fiber.

As such, the connecting operation of the assembled first and second units 100 and 300 may be performed by fitting the second ferrule 220 of the second unit 300 to the sleeve 230 assembled to the first unit 100, and then protecting the same. The cover 310 is completed by fixing the fixing member 130. An index matching jell, which is a connection loss reducing material, is injected into the sleeve 230 when the first and second ferrules 210 and 220 are connected.

Therefore, as in the prior art, the first and second ferrules in which the first and second cores are inserted are guided and connected to the sleeves without moving only the cores to connect the cores. By eliminating, the core is connected correctly.

In addition, since the fixing of the optical fiber connected to the second ferrule is completed by clamping the pressure fixing tube screwed to the ferrule support tube by an external force and compressing the optical fiber, the assembling work is made simple.

An embodiment of the present invention described above should not be construed as limiting the technical spirit of the present invention. The scope of protection of the present invention is limited only by the matters described in the claims, and those skilled in the art can change and change the technical idea of the present invention in various forms. Therefore, such improvements and modifications will fall within the protection scope of the present invention as long as it will be apparent to those skilled in the art.

1 is an exploded view showing the embodiment of the field-assembled clamp type optical connector according to the present invention for each component;

2 is a cross-sectional view showing an assembled state of the field assembly type optical connector of FIG.

Figure 3 is a cross-sectional view showing a separated state of the field assembly optical connector of Figure 1;

<Description of Symbols for Main Parts of Drawings>

100: first unit 200: ferrule unit

210: first ferrule 220: second ferrule

230: sleeve 300: second unit

400: optical fiber fixing means 410: ferrule support tube

420: pressure fixing tube 500: elastic member

C1: first core C2: second core

H: Core insertion hole

Claims (2)

A first unit having a housing, a plug movably inserted into and fixed to the housing, and a fixing member inserted into and fixed to the plug; A ferrule unit in which a part of the fixing member is inserted and the core of the optical fiber is inserted; Optical fiber tightening means installed at an end of the ferrule unit to press the outer surface of the optical fiber having a core inserted into the ferrule unit to fix the optical fiber; A second unit coupled to the fixing member to fix the ferrule unit and the optical fiber fastening means; The optical fiber tightening means A ferrule support tube configured to penetrate the inside thereof and have an end portion of the ferrol unit inserted at one side to support the ferrol unit; It is penetrated inside and screwed to the ferrol support tube, and guides the optical fiber drawn out from the second unit to the ferrol support tube, and plastically deformed by an external pressure is made of a pressure fixing tube for pressing and fixing the optical fiber. Field-mounted clamp type optical connector. The method of claim 1, The ferrule unit is A first ferrule installed to elastically slide in the fixing member and having a first core inserted therein; A second ferrule inserted into an end of the ferrule support tube, into which a second core which is a core of the optical fiber drawn out from the second unit is inserted; And a sleeve for guiding the first and second ferrules through a central portion of the first and second ferrules so that the first and second ferrules are connected to each other so as to be in close contact with each other.

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