JPS59136709A - Multicore optical fiber connector - Google Patents

Abstract

PURPOSE:To facilitate maintenance by easily assembling and disassembling an adapter used for a multicore optical fiber connector even after components are fitted to a housing. CONSTITUTION:A flange 8a which has a smaller diameter than the inner circumference of the adapter body 8 and is used for attachment to the housing is provided at a specific position on a cylindrical shaft, and a key groove 8b is provided to the inner circumference of the adapter body 8; and the flange 8a of the adapter body 8 is positioned to fit a sleeve frame 9b. Then, plural sleeves 11 are inserted into the through hole of the sleeve frame 9b and a key pin 10 is fitted by the guidance of the key groove 8b. Further, a sleeve frame 9a is inserted and then a spring washer 12 which is a partially open ring is fitted in a groove 8c formed on the inner circumference of the adapter body 8 previously to hold the sleeve frames 9a and 9b fixedly, thus constituting the adapter body 7.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a detachable multi-core optical fiber connector consisting of a pair of plugs and adapters.

More specifically, the present invention relates to a multi-core optical fiber whose components can be easily assembled and disassembled with the adapter attached to the housing.

When connecting multi-core optical fibers, some use multiple single-core optical fiber connectors, while others involve fusing each original fiber.
・Connection using a multi-core optical fiber connector containing multiple ferrules can be used.

Conventionally, in the case of a multi-core optical fiber connector using a plurality of ferrules, an adapter 1 as shown in FIG. 1 can generally be used for one period. To explain according to the drawing, the adapter body 2 which attaches the flanges necessary for attaching to the casing.
Insert the sleeve frame 3 provided with a plurality of through holes into the
The sleeve 6 is inserted into the through hole of the sleeve frame 5, and a through hole is provided at the 7° angle to prevent the sleeve 6 from falling off.The adapter cover is provided with a through hole that is smaller than 1 diameter of the sleeve 6 and larger than the outer diameter of the ferrule. 4 Fully press fit. The cross-sectional shape of Attaguta Fu2 is high 7' with one end closed.
A predetermined number of through holes larger than the outer diameter of the ferrule are provided in II. The adapter body 2 is assembled using a positioning pin 5 so that the through holes of the adapter body 2, the through holes of the sleeve frame 5, and the adapter cover 4 are aligned in plan view.

The adapter body 1 assembled in this way is used by being fixed and held in the housing by a method such as screwing, and the sleeve 6 td that fits and holds the ferrule is often made of phosphor bronze having spring properties. When used outdoors for a long time or indoors where the temperature and humidity are not controlled, the sleeve often rusts and cannot be mated. Also, due to the structure of the adapter 1, it is impossible to replace the sleeve 9.
If the sleeve 6 becomes unusable, the whole area of the attaguta 1 must be sold together with the defective sheadata, which inevitably increases the price.

Also, if used for a long period of time in a dusty environment, the ferrule end surface will become difficult to connect and disconnect the connector.

In particular, if dust or dirt adheres to the optical fiber surface, losses will be large. In this case, it is necessary to wipe the ferrule end face with a cloth or paper soaked in absolute alcohol, etc.
Adapter body 1'f: When attached to the housing, after disassembling the housing, both the multi-core connector on the inside of the housing and the connector on the outside must be removed and wiped off. This method has disadvantages in that it is time consuming and requires complicated work.

In order to eliminate the above-mentioned drawbacks, the present invention is configured such that the adapter can be easily disassembled and assembled even after being attached to the housing, and will be described in detail below with reference to one drawing.

Figure 2 shows an example of the invention from this issue, and shows the inner circumferential ladder of the adapter body 8, which has seven lunges for attachment to the housing.

A flange 8a having a smaller diameter than the inner circumference is provided at a constant position H1 on the cylindrical shaft. In addition, a keyway 8b is provided on the inner periphery of the adapter body 8, and the sleeve frame 9b is fitted with the seven flange 8a of the adapter body 8 positioned. Thereafter, the plurality of sleeves 11 are pushed into the negative through holes of the sleeve frame 9b. Same, S17-) Frames 9 a, 9 b
I((() is provided with a through hole larger than the outer diameter of the phenorail and a through hole larger than the outer diameter of the sleeve, and female threads 9c, 9d are provided at the center of the sleeve frames 9a, 9b.Next To.

Using the keyway 8b as a guide, insert the keybin 10 completely.

Furthermore, after the sleeve frame 9a is pushed in, the ? The adapter 7 is constructed by fitting a spring washer 12, which is a partially open ring, into f48C and fixing and holding the sleeve frame 9a+'9bf with A7.

After attaching the adapter 7 to the housing, fit and hold the "]" lug (not shown) inside the housing. Next, attach the
Lag (not shown) is left blank. At this time.

The adapter 7" tough and the lug 1 are fastened by screw fastening or simple fastening. If the flags are left tied to both ends of the adapter 7 for a long period of time, the sleeve 11 will rust and replacement will be required. At that time) After tightening the screws to the female threads of the sleeve frames 9a and 9b using a tool with a male thread on one end as shown in Figure 5, insert a Vincent 7x with a thin tip into the keyway 8b of the adapter 7. Remove the suzuring onesie 8c using a tool.Sleeve frames 9a, 9b
After pulling it out, remove the sleeve 11. Then the sleeve? After a and 9b are attached to the adapter body 8, they are fixedly held using a spring holder 12.

Dad, if you attach and detach the flag outside the casing (fastened to 1411) multiple times, dust generated from the components will adhere to the end face of the ferrule. It is necessary to wipe off this adhered dust, but as described above, when the sleeve frames 9a, 9b, sleeve 111, and spring washer 12 are removed, the ferrule of the two-lug fastened to the inside of the housing is exposed. 7. This exposed end face of the ferrule. Wipe away paper and text soaked in a solvent such as absolute alcohol using a cloth. after that,
Attach the sleeve frames 9a, 9b, sleeve 11, and spring washer 12.

As mentioned above, the adapter of the present invention used for multi-core optical fiber connectors has a structure that allows for easy disassembly and assembly even after the component parts are attached to the housing.
It is possible to replace the screen and clean the ferrule end face. The result of this.

The effect of significantly reducing maintenance costs is remarkable.

[Brief explanation of drawings]

FIGS. 1A and 1B are diagrams showing a conventional multi-core optical fiber connector adapter. Figure 2) and (B) are diagrams showing the adapter for a multi-core fiber connector of the present invention. , 1 and 5 are diagrams showing a displacement jig used when disassembling and assembling the adder of the present invention. 1.7...Adapter, 2.8...Adapter body. 5.9a, 9b... Sleeve frame, 4... Adapter cover, 5... Unpositioned bin. 6.11... Sleeve, 8b... Keyway. 8c...Groove, 9c,,9d...Female screw part.

Claims (1)

[Claims] (1) In a multi-core optical fiber connector consisting of a plug, an adapter, and a -plug, the adapter includes:
A flange is provided at approximately the center of the outer periphery, two-lug fastening screws or pins are provided at both ends of the outer periphery, a keyway is provided in the axial direction of the inner periphery, and a flange is provided at one end of the inner periphery perpendicular to the axial direction. A 4/10 cylindrical member with a groove and a flange on the part, and a plurality of sleeves into which a ferrule that supports the optical fiber end is fitted, and a key groove is provided on a part of the outer periphery. . a second cylindrical member provided with an acid screw in the center; and the fang 1.
The key groove and ridge provided in a part of the circumference of the cylindrical part of the 20
Insert into the key groove provided on a part of the outer periphery of the circle ivJ section.
The key pin and the groove provided on the inner periphery of the cylindrical member 1 and 1 are used to securely hold the circular part of spear 1 and the cylindrical part of spear 2 by inserting the ring into the open ring. A multi-core optical fiber connector characterized in that the adapter is configured as follows.