KR20080037502A - Optical connector for assembling in the field - Google Patents

Abstract

An instant assembly-type optical connector is provided to enable a user to assembly the optical connector in a field by forming a main line coupling member using a transparent material. An instant assembly-type optical connector includes a housing(100), to which a plug(200) is inserted. A main line coupling member(300) is coupled with the plug using a fixing cap(400). The main line coupling member is elastically supported on the fixing cap using a spring(500). A ferrule(30) is fixedly coupled with an end portion of the main line coupling member. A fixing member(600) is detachably pressed into a free end of the main line coupling member. The fixing member is arranged to be detachably coupled with the fixing cap and sealed by a protective cover(700).

Description

Optical connector for assembling in the field}

1A and 1B are views for explaining the configuration of a conventional field assembly type optical connector.

2 is a view for explaining the configuration of the main line connecting member 40 shown in FIG.

3A, 3B, and 4 illustrate a configuration of a conventional reusable optical connector.

Figure 5 is a perspective view of the combined field assembly optical connector according to an embodiment of the present invention.

Figure 6 is an exploded perspective view of the field assembly optical connector shown in FIG.

7 is an exploded cross-sectional view of the field assembly optical connector shown in FIG.

8 is a cross-sectional view of the coupling of the field assembly optical connector shown in FIG.

9A and 9B are an external perspective view and a separated perspective view of the main coupling member 300 shown in FIG. 6.

******* Brief description of the main parts of the drawing *******

100: housing, 200: plug,

300: the main coupling member, 400: fixed cap,

500: spring, 600: fixing member,

700: protective cover.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical connector, and more particularly, to a field assembly type optical connector that can be stably and easily carried out and can be reused.

Recently, an FTTH (Fiber To The Home) system has been proposed that can provide various information including broadcasting and communication by connecting optical cables to homes and is being applied to new apartments.

In the FTTH system, the optical cable is connected to the wall of the home, for example, and the end thereof is finished in the form of a connector and installed on the wall. In this case, the FTTH worker sets the optical cable a few meters longer than the actual length in consideration of the connection between the optical cables to flow into the home. In addition, the worker cuts the optical cable as long as necessary in the construction site, that is, in the house, assembles the optical connector at the end thereof, connects it to the optical adapter, and installs it on the wall of the house.

On the other hand, the optical fiber generally includes a core layer and a cladding layer. This is usually called a main line or a core wire. The diameter of this main line is set to approximately 125 mu m. Then, a coating layer is coated on the outer side of the main line with a thickness of approximately 250 μm (hereinafter referred to as coating main line), and an outer skin is coated on the outer side of the coating layer with a thickness of approximately 900 μm (hereinafter, referred to as element wire). . Subsequently, a jacket made of, for example, PVC is coated on the outside of the element wire through a buffer material such as kevlar (aramid yarn) for strengthening tensile strength.

The optical fiber is capable of transmitting and receiving a desired signal through light transmitted through the core layer. Therefore, in the construction of the optical cable it is necessary to accurately align the main line of the optical cable in order to minimize the transmission loss of the light.

1 is for explaining the structure of the field assembly type optical connector for coupling the optical cable through the alignment arrangement as described above, Figure 1a is a cross-sectional view of the conventional field assembly optical connector, Figure 1b is a separate cross-sectional view.

As shown in the related art field assembly optical connector, the plug 20 is inserted into and fixed to the housing 10. The plug 20 is provided with a ferrule accommodation hole 21 in which the ferrule 30 is accommodated and a main line connection member accommodation hole 22 in which the ferrule connection member 40 is accommodated. The ferrule 30 and the main connecting member 40 are fixedly coupled to, for example, an epoxy resin. C-type clip 50 is fastened to the outside of the main line connecting member 40. In addition, the fixing member 70 is fastened to the plug 20 while supporting the main line connecting member 40 in one direction through a spring 60 disposed inside, and the free end of the fixing member 70 is fastened. It is sealed by the protective cover 80.

The main line connecting member 40 is configured in a clip shape. That is, as shown in FIG. 2, the main line connecting member 40 has a cutting groove 40a formed along the longitudinal direction thereof, and a main line inserting hole 41 is formed inside the cutting groove 40a. Accordingly, when the C-type clip 50 is fastened to the main line connecting member 40, the inner line r of the main line insertion hole 41 decreases and the main line disposed in the main line insertion hole 41 is stably fixed.

In the optical connector having the above-described structure, the ferrule main line (A) and the main line (B) of the optical cable are inserted into the main line insertion hole (41) of the main line connecting member (40) and closely aligned, followed by the C-type clip (50). By fastening the two main lines (A, B) is to be stably coupled. Then, after the assembly is fixedly coupled to the plug 20 through the fixing member 70, the optical cable is stably connected to the ferrule main line A by finally coupling the protective cover 80 to the fixing member 70. Will be combined.

However, in the above-described structure, since the operator is to determine whether the main line is normally coupled with the operator's hand feeling, there is a disadvantage that the main line coupling is not precisely performed, and when the main line coupling is not made correctly, There was a problem in that the assembly of the optical connector again.

In addition, since the C-type clip 50 is fixedly coupled to the main line connecting member 40, and the fixing member 70 is fixedly coupled to the plug 20, the ferrule main line A is fixed by the operator's mistake. If the main line (B) of the optical cable is not properly coupled, or if it is necessary to reconnect the optical cable due to other needs, there is a disadvantage in that the currently connected optical connector is broken and the work is performed again using a new optical connector.

On the other hand, Korean Patent Registration No. 10-0507543 discloses an optical connector that can be reused.

 Figure 3 is for explaining the structure of the field assembly optical connector disclosed in the patent, Figure 3a is a coupling cross-sectional view, Figure 3b is a separate cross-sectional view. In addition, in FIG. 3, the same reference numeral is attached | subjected to the substantially same part as FIG. 1 mentioned above, and the detailed description is abbreviate | omitted.

In the optical connector of FIG. 3, the flange 31 is fixedly coupled to the ferrule 30. These constitute the main alignment member 90. The flange 31 is inserted and fixed to the flange holder 40'a of the main line connecting member 40 '. Similar to the optical connector of FIG. 1, the main line connecting member 40 ′ has a clip shape and a main line insertion hole 41 ′ for inserting the main line B of the optical cable. Particularly, the main line B portion and the element C portion of the optical cable side are inserted into the main line insertion hole 41 '. That is, the diameter of the main line insertion hole 41 ′ is set to a size into which the element C of the optical cable can be inserted.

A fixing member 70 'is fitted to the outside of the main line connecting member 40' and fixedly coupled to the plug 20, and the flange 31 is elastic to the fixing member 70 'by a spring 60'. Supported.

The tightening member 50 'is fitted while surrounding the main connecting member 40' on the outer side of the main connecting member 40 '. At this time, the fastening member 50 'is detachably coupled with the main line connecting member 40'. Then, the protective cover 80 is inserted to surround the free end of the tightening member 40 'and coupled to the fixing member 70'.

In the above structure, the fastening member 50 ′ detachable to the main line connecting member 40 ′ is fixed to fix the element wire C inserted into the main line connecting member 40 ′. Therefore, the structure allows the main assembly B to be recombined after the fastening member 50 'is separated from the main assembly connecting member 40'. In other words, the optical connector can be reused.

In addition, Figure 4 is an exploded cross-sectional view of the field assembly type optical connector of another structural type disclosed in Korea Patent Registration No. 10-0507543.

In FIG. 4, a ferrule accommodation hole 31a for inserting and fixing the ferrule 40'b into the flange 31 constituting the main alignment member 90 'is provided, and the flange of the main connection member 40' is provided. The ferrule 40'b is provided in the holder 40'a. In addition, the other structure is substantially the same as FIG.

In the above structure, the ferrule main line A is inserted into the main line connecting member 40 'through the ferrule 30 of the main line alignment member 90', and the main line through the protective cover 80 and the fastening member 50 '. The main line B of the optical cable is inserted into the connecting member 40 'so that both main lines A and B are coupled to each other at the main line insertion hole 41' of the main line connecting member 40 '.

The structure of FIG. 4 allows the ferrule main line A to be inserted through the ferrule 30 of the main line alignment member 90 ', thereby reducing the optical cable from the protective cover 80 side to the main line alignment member 90 in the structure of FIG. After inserting the main line (B) is to remove the inconvenience to cut and polish the main line (B) of the optical cable drawn out to the outer end of the ferrule 30.

However, the conventional optical connector has the following problems.

1. In the conventional optical connector, the main line connecting member 40 'for connecting the main lines A and B is configured in the form of a clip. In particular, the diameter of the main line inserting hole 41' is the diameter of the element C. It is set to a size corresponding to.

Therefore, in the conventional optical connector, since the main line cannot be stably supported by the main line connecting member 40 ', the main line alignment member 90 is required for the alignment of the main line. Accordingly, parts of the flange 31 and the ferrule 40'b are additionally required.

In addition, in the structure of FIG. 4, since the diameter of the main line inserting hole 41 'is set larger than the main lines A and B inserted therein, there is a disadvantage in that optical alignment between the main lines A and B is not precisely performed. . In addition, even when the fastening member 50 'is fastened to the main line connecting member 40', the engaging portions of the main lines A and B, in particular, the main lines A and B, are stably maintained in the main line insertion hole 41 '. Since it is not fixed and supported, there is a problem that the optical alignment between the main lines (A, B) is damaged by external vibration or the like.

2. In the conventional optical connector, the main line connecting member 40 'for connecting the main lines A and B is configured in the form of a clip, and the fastening member 50' for tightening the main line connecting member 40 'is provided. Removably fastened to the main line connecting member (40 '). Therefore, in the conventional structure, there is a problem in that the main line B of the optical cable is not stably fixed in the main line connecting member 40 '.

That is, in the conventional structure shown in FIG. 1, the main line connecting member 40 in the form of a clip is firmly fixed using the C-type clip 50. At this time, the C-type clip 50 is inserted in a direction perpendicular to the main line connecting member 40. Therefore, in the structure shown in FIG. 1, the diameter of the C-type clip 50 is set sufficiently small as compared with the main line connecting member 40, so that the main line connecting member 40 can be tightened very strongly. That is, the main line or the element wire is firmly fixed in the main line connecting member 40.

However, in the optical connector shown in Figs.

(1) Only the element wire C is fixed by the main line connecting member 40 ',

(2) Since the fastening member 50 'is inserted along the longitudinal direction of the main line connecting member 40', the coupling force of the fastening member 50 'to the main line connecting member 40' is determined to be greater than or equal to a predetermined value in consideration of its detachability. Can not be set to strength,

(3) Since the length of the element wire C inserted into the main line connecting member 40 'is limited to a predetermined length or less,

Coupling force between the main line insertion hole 41 'and the element wire C is not sufficiently secured.

Accordingly, the optical connector of FIGS. 3 and 4 may have a problem in which the main line B and the element C, that is, the optical cable are separated from the optical connector even when a relatively low external tension is applied to the optical cable.

3. In the conventional optical connector, the coupling between the main lines (A, B) through the main line connecting members (40, 40 ') is made entirely by the hand sense of the operator, there is a problem that the work precision is low.

4. In the conventional optical connector, since the coupling portion between the main lines (A, B) is not supported inside the main line connecting members (40, 40 '), C type after aligning the main lines (A, B) during operation When the clip 50 or the fastening member 50 'is coupled, the alignment between the main lines A and B may be changed.

Accordingly, the present invention has been made in view of the above-described circumstances, and an object thereof is to provide an on-site assembly type optical connector that is excellent in on-site assembling and reusable.

In addition, another object of the present invention is to provide a field-assembled optical connector that can be coupled to the optical cable in a stable and robust.

Field assembly type optical connector according to the first aspect of the present invention for achieving the above object is an optical connector for coupling the ferrule main line and the main line of the optical cable in an optical alignment state, the housing, the plug, the ferrule inserted and fixed to the housing Ferrules with main lines coupled to each other, ferrule holders for coupling the ferrules to the front end, and main line coupling members for mutually fixing the ferrule main lines and the main lines of the optical cable, and fixedly coupled to the plugs while elastically supporting the main line coupling members. And a fixing member to be fastened to the fixing cap, the fixing member being fastened to the fixing cap at a right angle with respect to its longitudinal direction, and having a coupling member insertion hole into which the main coupling member is detachably inserted. A protective cover is detachably fastened to the plug while accommodating the fixing member therein. The main line coupling member includes first and second plates formed separately from each other along a longitudinal direction in which the main line is inserted, and the first plate communicates with the ferrule holder and inserts the main line. The first insertion groove and the second insertion groove for inserting the element wires are formed in communication with each other, the second plate is formed with a third insertion groove in a position corresponding to the second insertion groove, the first insertion groove is a cross section It is formed so as to have this V shape.

In addition, the field assembly type optical connector according to a second aspect of the present invention for achieving the above object is an optical connector for coupling the ferrule main line and the main line of the optical cable in an optical alignment state, the housing and the plug inserted and fixed to the housing And a ferrule holder having a ferrule main line coupled thereto, a ferrule holder for coupling the ferrule to a distal end, and a main line coupling member having a main line inserting groove for inserting the main line along the longitudinal direction, while elastically supporting the main line coupling member. A fixing cap fixedly coupled to the plug, and a coupling member insertion hole into which the main coupling member is detachably inserted, and fastened to the fixing cap and pressing the main coupling member at a right angle to the longitudinal direction. And a protective cover detachably fastened to the plug while accommodating the member and the fixing member therein. By being configured, arranged said coupling member is formed to have a tapered shape, characterized in that the coupling member is formed to have a tapered insertion hole of the fixing member corresponding to the arranged engaging members.

That is, according to the present invention, it is possible to provide an on-site assembly type optical connector that is excellent in on-site assembly, reusable, and can stably and firmly combine an optical cable.

Hereinafter, an embodiment according to the present invention will be described with reference to the drawings. However, the embodiments described below show one preferred embodiment of the present invention, which is not intended to limit the scope of the present invention. The present invention can be carried out in various modifications without departing from the technical spirit of the invention.

5 to 8 are views for explaining the structure of the field assembly optical connector according to the first embodiment of the present invention, Figure 5 is a perspective view showing the external appearance of the field assembly optical connector, Figure 6 is a field An exploded perspective view of the assembled optical connector, Figure 7 is an exploded cross-sectional view of the field assembly optical connector, Figure 8 is a combined cross-sectional view of the field assembled optical connector.

In the field assembly type optical connector according to the present invention, the plug 200 is inserted into and fixed to the housing 100, and the main assembly coupling member 300 is fastened to the plug 200 through the fixing cap 400. At this time, the main line coupling member 300 is elastically supported by the fixing cap 400 through the spring (500). The ferrule 30 is fixedly coupled to the distal end of the main coupling member 300, and the fixing member 600 is detachably press-fitted to the free end of the main coupling member 300. The fixing member 600 is detachably coupled to the fixing cap 400 and is configured to be sealed by the protective cover 700.

The plug 200 is movably fastened to the housing 100. Fastening grooves 110 for fastening the plug 200 are formed on both side surfaces of the housing 100, and the fixing protrusion 260 of the plug 200 is fastened to the fastening groove 110. In particular, the length of the fastening groove 110 is set longer than the length between the pair of fixing protrusions 260 formed in the plug 200 so that the plug 200 may flow by a predetermined distance in the length direction in the housing 100. To be fastened.

In addition, the upper surface of the housing 100 is formed with a projection (100a) for fastening the connector and the other connector, the through hole 120 is formed on the upper and lower surfaces of the housing 100, or at least one of them. do. The through hole 120 is formed at a position corresponding to the main line engaging portion of the main line coupling member 300. This through-hole 120 is external to the alignment portion of the main line when visually confirming the alignment and engagement of the main line in the main line coupling member 300, or assembling the optical connector using a jig, etc. as will be described later It is for temporarily fixing by inserting the instrument.

In addition, the upper surface of the housing 100 is formed with a guide groove 130 for guiding the fastening direction and the fastening position of each device. The indicating groove 130 allows the operator to recognize the assembly direction of the optical connector, and to recognize the assembling completion state for each element with a feeling of assembling.

The plug 200 is provided with a fixing cap receiving hole 210 for receiving and fixing the fixing cap 400 and an optical outlet coupling hole 230 for fastening an optical outlet (not shown), and receiving the fixing cap. A ferrule through-hole 220 is provided to penetrate the ferrule 30 from the hole 210 to the light outlet fastening hole 230. In addition, a fixing protrusion 270 is formed at one side of the fixing cap receiving hole 210 to be coupled with the anti-rotation jaw 312 of the main line coupling member 300.

In addition, a pair of fixing protrusions 260 for fastening the plug 200 to the housing 100 as described above are formed on both outer sides of the plug 200, and for fastening the fixing cap 400. The fixing cap fastening hole 250 is formed. In addition, the upper and lower surfaces of the plug 200 are formed with a cutting groove 240 for elastically fixing the fixing cap 400 when the fixing cap 400 is pressed in and fixed to the lower side of the fixing cap fastening hole 250. An inner circumferential edge of the plug 200 is coupled to the coupling ring 450 of the fixing cap 400 to form a fixing cap coupling groove 280 for fixing the fixing cap 400 more firmly.

The front end portion of the main line coupling member 300 is provided with a ferrule holder 311 for accommodating and fixing the ferrule 30. In addition, on the outer circumferential surface of the ferrule holder 311, a rotation preventing jaw 312 is formed to prevent the main assembly coupling member 300 from rotating in the plug 200. The anti-rotation jaw 312 is formed with a fastening groove 312a that is fastened to the fixing protrusion 270 provided in the fixing cap receiving hole 210 of the plug 200.

As shown in FIGS. 9A and 9B, the main line coupling member 300 includes first and second plates 310 and 320. In this embodiment, the first plate 310 constitutes a lower plate, and the second plate 320 constitutes an upper plate. In addition, the ferrule holder 311 is integrally coupled to one of the first plate 310 or the second plate 320, and in this embodiment, the lower plate 310.

A plurality of guide grooves 314 are formed in the lower plate 310, and a guide protrusion 322 is formed in a position corresponding to the guide groove 314 in the upper plate 320. These guide grooves 314 and guide protrusions 322 are for allowing the operator to easily combine the lower plate 310 and the upper plate 320.

The main line insertion groove 313 is formed in the central portion of the upper surface of the lower plate 310 along the longitudinal direction. The main line insertion groove 313 communicates with the inside of the ferrule holder 311. The main line insertion groove 313 includes first to third insertion grooves 3131, 3132, and 3133. The first to third insertion grooves 3131 to 3133 are integrally communicated and formed to have different widths and heights. As described above, the main line has a diameter of, for example, 125 μm, the coating main line of 250 μm, and the small wire of 900 μm. The first insertion groove 3131 is a main line, the second insertion groove 3132 is a coating main line, the third insertion groove 3133 is set to a size that can be fixed by inserting the element wire.

The first and second insertion grooves 3131 and 3132 have a V-shaped cross section, and the third insertion groove 3133 has a circular cross section, and has a triangular cross section in a direction perpendicular to the longitudinal direction. The projection 3133a is formed. In particular, the protrusion 3133a is formed to be inclined from the free end side to the anti-rotation jaw 312, so that the wire is freely introduced into the main line insertion groove 313 from the free end side, while the lead 3133a is once drawn into the main line insertion groove 313. The outgoing of the burned wires in the reverse direction is suppressed as much as possible.

In addition, in the upper plate 320, portions corresponding to the first and second insertion grooves 3131 and 3132 are made flat, while portions corresponding to the third insertion grooves 3133 are formed in the third insertion groove 3133. A fourth insertion groove 321 of the same shape as () is formed. In addition, the protrusion 321a is formed in the fourth insertion groove 321 in the same manner as the third insertion groove 3133.

Accordingly, the main lines A and B and the coating main lines disposed in the first and second insertion grooves 3131 and 3132 are pressed downward by the upper plate 320 to be firmly pressed into the V-shaped grooves, and the element wires ( C) is firmly fixed in the third and fourth insertion grooves 3133 and 321.

In addition, at least two or more point protrusions 323 are formed on the outer circumferential surfaces of the lower plate 310 and the upper plate 320 along its longitudinal direction. The point protrusions 323 are preferably provided one at a position corresponding to the first to third insertion grooves 3131 to 3133, respectively. The point protrusion 323 is a lower plate of the main line coupling member 300 while minimizing the friction force between the main line coupling member 300 and the fixing member 600 when inserting the fixing member 600 to the main line coupling member 300 ( To maximize the coupling force between the 310 and the top plate 320.

That is, in order to increase the coupling force between the lower plate 310 and the upper plate 320 of the main coupling member 300 as described above, the inner diameter of the fixing member 600 should be set to the outer diameter of the main coupling member 300 or less. However, in this case, the friction force between the main assembly coupling member 300 and the fixing member 600 becomes very high, and thus the detachability of the fixing member 600 with respect to the main assembly coupling member 300 becomes very low.

On the other hand, if the inner diameter of the fixing member 600 is set larger than the outer diameter of the main coupling member 300 by a predetermined or more than the detachable property of the fixing member 600 to the main coupling member 300, while the main coupling member 300 The coupling force between the lower plate 310 and the upper plate 320 is lowered.

In an ideal case, it is preferable to set the outer diameter of the main line coupling member 300 and the inner diameter of the fixing member 600 to be the same. However, in this case, the fixing member 600 cannot be fastened to the main coupling member 300 by the friction force between the main coupling member 300 and the fixing member 600.

Preferably, the point protrusion 323 is formed on the outer side of the main line coupling member 300, and the inner diameter of the fixing member 600 is a value between the outer diameter of the main line coupling member 300 and the outer diameter of the point protrusion 323 portion. When it is set to the contact area between the fixing member 600 and the main line coupling member 300 by the point protrusion 323 is reduced the frictional force, and also the portion where the point protrusion 323 is installed compared to other parts Since the outer diameter of the coupling member 300 is set to be large to tightly tighten the lower plate 310 and the upper plate 320, the coupling force between the lower plate 310 and the upper plate 320 can be improved to the maximum.

In addition, in another preferred configuration, the outer diameter of the main line coupling member 300 is formed in a tapered shape to gradually decrease toward the free end side, and the coupling member insertion hole 620 of the fixing member 600 also includes the main line coupling member 300. It is formed in a tapered shape corresponding to.

In this way, when the fixing member 600 is fastened to the main coupling member 300, the main coupling member 300 and the fixing member 600 are minimized while minimizing frictional force between the main coupling member 300 and the fixing member 600. It is possible to closely bond as a whole.

Also in this case, if the point protrusions are formed on the outer circumferential surface of the main coupling member 300, the coupling force between the lower plate 310 and the upper panel 320 of the main coupling member 300 can be improved to the maximum.

In addition, the upper plate 320 or lower plate 310 and the upper plate 320 in the main line coupling member 300 is preferably made of a transparent material. In this way, the operator can visually check the coupling state when the operator performs the joint coupling using the optical connector, and thus it is possible to execute the main alignment precisely.

In addition, preferably the C-type clip 330 is fastened to the upper end of the main line alignment member 300. At this time, the length of the C-type clip 330 is set shorter than the length of the ferrule main line (A) introduced into the main line insertion groove (313). When the length of the C-type clip 330 is set longer than the length of the ferrule main line (A), the C-type clip 330 will press the coupling portion between the ferrule main line (A) and the optical cable main line (B), so that the main line (A) Difficulty in inserting the main line (B)

The C-type clip 330 stably fixes the ferrule main line A with respect to the main line insertion groove 313, and in particular, tightens the distal end portion of the main line alignment member 300 so that the lower plate 310 and the upper plate 320 of the end portion are closed. By allowing the gap to open, the main line (B) can be easily inserted into the main line insertion groove (313).

The fixing cap 400 fastens the main line coupling member 300 with respect to the plug 200 to be movable by a predetermined distance along its longitudinal direction. Fixing cap 400 is made of a cylindrical shape, the inner end portion is provided with a spring receiving hole 420 for accommodating the spring 500. The spring 500 elastically supports the anti-rotation jaw 312 of the main coupling member 300.

On the outer circumferential surface of the fixing cap 400, the fitting protrusion 430 and the fastening ring 450 which are fastened to the fixing cap fastening hole 250 and the fastening groove 260 of the plug 200, respectively, and the fixing member 600 are fixed. A fastening ring 440 is fitted to the cap fastening groove 640. In addition, the fastening ring 440 is formed with a fastening groove 441 that is coupled to the fastening protrusion 641 of the fixing member 600. The fastening rings 450 and 440 stably fasten the fixing cap 400 to the plug 200 and the fixing member 600, and generate a fastening sound during the fastening so that the worker can check the fastening state.

In addition, the fixing cap 400 is formed with a through hole 410 at a position corresponding to the through hole 120 of the housing 100. The through hole 410 is formed at a position corresponding to the main line joining portion of the main line joining member 300, similar to the through hole 120, and the operator visually displays the alignment and the joining state of the main line in the main line joining member 300. Or, when assembling the optical connector using a tool such as a tool for temporarily fixing by inserting an external mechanism in the alignment portion of the main line.

In addition, the upper surface of the fixing cap 400 is provided with an indicator projection 460 for guiding the fastening direction and the fastening position of each device. The indication protrusion 460 not only recognizes the assembly direction of the optical connector to the worker, but also makes the assembly complete state for each device with a feeling of assembling.

The fixing member 600 has a cutout groove 610 formed at a position corresponding to the through hole 410 of the fixing cap 400. The fixing member 600 is connected to the fixing cap receiving hole 630 for accommodating the lower portion of the fixing cap 400, the fixed cap receiving hole 630, and the main line coupling member 300 is inserted and fixed. A coupling member insertion hole 620 is provided.

An inner side of the fixing cap receiving hole 630 is provided with a fixing cap fastening groove 640 and a fastening protrusion 641 engaged with the fastening ring 440 and the fastening groove 441 of the fixed cap 400. .

The coupling member insertion hole 620 is set to a size such that the inner diameter of the coupling member insertion hole 620 can properly compress the lower plate 310 and the upper plate 320. Preferably, when the main coupling member 300 has a tapered shape, the coupling member insertion hole 620 also has a tapered shape corresponding thereto.

In addition, an identification symbol of the type of the optical connector, the manufacturer, or the like is displayed on a predetermined portion of the outer side of the fixing member 600. In addition, the fixing member 600 is formed in a color corresponding to the type of the optical connector.

In addition, the upper surface of the fixing member 600 is provided with a pointing projection 650 for guiding the fastening direction and the fastening position of each element. The indicator protrusion 650 is engaged with the indicator groove 130 of the housing 100. This allows the operator to recognize the assembly direction of the optical connector, as well as to recognize the assembly completion state for each device with the feeling of assembly.

The protective cover 700 is made of an elastic material such as silicon. The protective cover 700 is formed with a window 130 having a predetermined size at a position corresponding to the identification symbol displayed on the outside of the fixing member 600, so that the operator recognizes the identification symbol or the fixing member 600 You can check the color.

In addition, the protective cover 700 is a housing fastening hole 720 for inserting and fastening the end of the housing 100, a fixing member receiving hole 730 for accommodating the fixing member 600, the fixing member ( The coupling member accommodating hole 740 for accommodating the end of the main line coupling member 300 protruding to the outside of the 600, and a guide hole 750 for guiding the element wire (C) flowing from the outside.

In addition, the upper surface of the protective cover 700 is provided with an indicator projection 760 for guiding the fastening direction and the fastening position of each device. The indicator protrusion 760 recognizes the assembly direction of the optical connector to the worker.

Next, the assembly process of the field assembly optical connector having the above-described configuration will be described.

First, the ferrule 30 in which the main line A protrudes a predetermined length is inserted and fixed to the ferrule holder 311 of the main line coupling member 300.

The worker cuts the optical cable introduced into the home at a necessary position, and the tip of the cut optical cable is formed into a main line (B) of a predetermined length and an element wire (C) of a predetermined length.

The operator arranges the upper plate 320 on the lower plate 310 of the main assembly coupling member 300, and fastens the C-type clip 330 to the upper outer side of the lower plate 310 and the upper plate 320. At this time, the end of the main line coupling member 300 is in the state where the lower plate 310 and the upper plate 320 are separated by a predetermined interval by the C-type clip 330 to facilitate the insertion of the main line (B).

The worker sequentially inserts the spring 500 and the fixing cap 400 to the main coupling member 300. Then, the operator pushes the fixing cap 400 to the inside of the plug 200 and fastens the plug 200 to the housing 100 again. At this time, the spring 500 is seated on the inner side of the fixing cap 400 to elastically support the main line coupling member 300 in one direction.

In the above state, the operator sequentially inserts the protective cover 700 and the fixing member 600 to the optical cable with the tip portion of the main line (B).

The operator pushes the optical cable into the main line insertion groove 313 of the main line coupling member 300 to engage the main line (A, B). At this time, when the main assembly coupling member 300 is made of a transparent material, the through hole 130 of the housing 100 and the through hole 410 of the fixing cap 400 and the cutting groove 610 of the fixing member 600 are formed. Through this, the operator can visually check the coupling state of the main line A and the main line B, which are performed inside the main line coupling member 300.

The operator pushes the fixing member 600 so as to surround the main line coupling member 300, and the protrusion 641 formed inside the fastening groove 441 and the fixing member 600 of the fastening ring 400 formed on the fixing cap 400. Fit the parts into place. Accordingly, the lower plate 310 and the upper plate 320 of the main line coupling member 300 are in close contact with each other to fix the main line B and the element C disposed in the main line insertion groove 313. In addition, by the point protrusion 322 formed on the outer circumferential surface of the main line coupling member 300, the coupling force between the main line coupling member 300 and the fixing member 600 is firm.

Lastly, the operator completes the optical connector assembly in the field by pushing the protective cover 700 on the rear end of the housing 100.

On the other hand, if you want to fasten a new optical fiber by separating the optical connector assembled as described above, the operator first checks the identification symbol or color of the fixing member 600 through the window 710 of the protective cover 700, Determine whether the optical connector is a reusable optical connector. Subsequently, the worker applies physical force to the protective cover 700 and the fixing member 600 in the optical connector determined to be reusable, and then separates them, and the optical cable formed with the main line B is removed from the main line coupling member 300. To me.

In addition, in this state, the operator sequentially inserts the new optical cable having the main line formed into the protective cover 700 and the fixing member 600, and then inserts the optical cable into the main line insertion groove 313 of the main line coupling member 300. By performing a series of processes for fastening the fixing member 600 and the protective cover 700, the field assembly type optical connector is reassembled.

That is, according to the above embodiment, the fixing cap surrounding the upper end of the main coupling member and the fixing member surrounding the free end of the main coupling member can be easily separated to provide an on-site assembled optical connector capable of reassembly. do.

At this time, the main assembly coupling member is formed on the V groove for fixing the main line and the main line insertion groove formed with a projection for fixing the element wires to ensure that the optical cable can be stably maintained even in the external tension of a certain strength It is possible to provide a connector.

In addition, by providing a point protrusion on the outer peripheral surface of the main coupling member, even if the fixing member is inserted in the longitudinal coupling member in the longitudinal direction to minimize the frictional force between the main coupling member and the fixing member to facilitate the attachment and detachment of the fixing member, By maximizing the coupling force between the lower plate and the upper plate of the coupling member it is possible to maintain a stable optical cable.

In addition, the main line coupling member is formed to have a tapered shape, the coupling member insertion hole of the fixing member is formed to have a tapered shape corresponding to the main line coupling member to maximize the coupling force between the fixed member and the main line coupling member.

In addition, the main assembly coupling member is formed of a transparent material and configured to penetrate the joining position of the main assembly coupling member, so that the operator can accurately assemble the optical connector while checking the main assembly coupling state in the field.

As described above, according to the present invention, it is possible to provide an on-site assembly type optical connector that is excellent in on-site assembly and reusable and capable of stably and stably coupling an optical cable.

Claims (14)

In the optical connector which combines the ferrule main line and the main line of the optical cable in the optical alignment state, Housings, A plug inserted into and fixed to the housing; Ferrules with ferrule arrangements, A ferrule holder for coupling the ferrule to the distal end, and a main line coupling member for coupling and fixing the ferrule main line and the main line of the optical cable to each other; A fixed cap fixedly coupled to the plug while elastically supporting the main coupling member; A fixing member having a coupling member insertion hole in which the main coupling member is detachably inserted and fastened to the fixing cap and pressing the main coupling member in a direction perpendicular to the longitudinal direction thereof; It comprises a protective cover that is detachably fastened to the plug while receiving the fixing member therein, The main coupling member has a first and a second plate formed separately from each other along the longitudinal direction in which the main line is inserted, the first plate is in communication with the ferrule holder and a first insert for inserting the main line The second insertion groove for inserting the groove and the element wire is formed in communication with each other, the second plate is formed with a third insertion groove in a position corresponding to the second insertion groove, the first insertion groove has a cross section V Field assembly type optical connector characterized in that it is formed to have a magnetic shape. The method of claim 1, And the ferrule holder and the first plate are integrally formed. The method of claim 1, A fourth insertion groove is provided between the first insertion groove and the second insertion groove to insert the coating main line. The fourth insertion groove is a field assembly type optical connector, characterized in that the cross section has a V-shape. The method of claim 1, And a plurality of protrusions having a triangular cross section in a direction perpendicular to the direction of insertion of the element wires are formed inside the second and third insertion grooves. The method of claim 4, wherein Field assembly type optical connector, characterized in that at least two or more point projections are provided on the outer peripheral surface of the main coupling member. The method according to claim 1 or 5, The main line coupling member is formed to have a tapered shape, Field assembly type optical connector, characterized in that the coupling member insertion hole of the fixing member is formed to have a tapered shape corresponding to the main line coupling member. The method of claim 1, At least one of the first and second plate is a field assembly optical connector, characterized in that made of a transparent material. The method of claim 1, Field assembly type optical connector, characterized in that the C-type clip is fastened to the front end of the main coupling member. The method according to claim 1 or 7, The housing and the fixed cap field assembly type optical connector, characterized in that the through-hole is formed corresponding to the position where the ferrule main line and the main line of the optical cable is fastened. The method of claim 1, Field assembly type optical connector, characterized in that the window is further formed on the protective cover. The method of claim 1, The housing is provided with an instruction groove for guiding the fastening direction or the fastening position of the device, the fixing cap, the upper surface of the fixing member and the protective cover is formed with an indicator projection for guiding the fastening direction or fastening position of the device is formed. Field assembly optical connector. In the optical connector which combines the ferrule main line and the main line of the optical cable in the optical alignment state, Housings, A plug inserted into and fixed to the housing; Ferrules with ferrule arrangements, A ferrule holder having a ferrule holder for coupling the ferrule to a distal end and having a main insertion hole for inserting a main along the longitudinal direction; A fixed cap fixedly coupled to the plug while elastically supporting the main coupling member; A fixing member having a coupling member insertion hole in which the main coupling member is detachably inserted and fastened to the fixing cap and pressing the main coupling member in a direction perpendicular to the longitudinal direction thereof; It comprises a protective cover that is detachably fastened to the plug while receiving the fixing member therein, The main coupling member is formed to have a tapered shape, Field assembly type optical connector, characterized in that the coupling member insertion hole of the fixing member is formed to have a tapered shape corresponding to the main line coupling member. The method of claim 12, Field assembly type optical connector, characterized in that at least two or more point protrusions are provided on the outer peripheral surface of the main assembly coupling member. The method of claim 12, The housing and the fixed cap field assembly type optical connector, characterized in that the through-hole is formed corresponding to the position where the ferrule main line and the main line of the optical cable is fastened.

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