JP3161609B2 - Optical connector plug structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical connector plug structure mounted on a high-density plug-in optical connector used for mounting a terminal device of an optical communication network such as a public communication line.

[0002]

2. Description of the Related Art In a conventional optical connector plug structure of this type, an engagement hole 23 is formed in a plug frame 14 as shown in FIG.
4 to form a ferrule 16 in the plug frame 14.
And the spring 17 and the plug frame 1
The stop ring 15 is inserted into the rear part of the ferrule 16, and the engaging projection 24 of the stop ring 15 is engaged with the engaging hole 23 to compress the spring 17. The flange 27 of the ferrule 16 is applied to the step 14a on the inner surface of the plug frame 14.
Some are fixed.

[0003]

However, in the conventional example, the optical connector plug itself is large, and this optical connector plug is used for a large optical connector. The development of a small optical connector has been demanded, and the optical connector plug used in this optical connector has naturally been demanded to be downsized.

[0004] Under these circumstances, there is a type in which the thickness of the plug frame and the stop ring is reduced, and the outer dimensions of the optical connector plug are further reduced. However, even if the diameter of the plug frame is reduced, a gap for inserting the sleeve holder between the ferrule housed in the plug frame and the inner peripheral surface of the plug frame is necessary. There is a limit to reducing the inner diameter of the plug frame. Therefore, the step on the inner surface of the plug frame at which the flange of the ferrule holder abuts cannot be increased.

The ferrule is fixed by applying the flange of the holder of the ferrule to the step on the inner surface of the plug frame by the urging force of a spring. If the step is small, the ferrule is not sufficiently supported. There is a problem that the ferrule oscillates, which causes a problem that the optical connector plugs do not fit together.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide an optical connector plug structure which can minimize the deflection of the ferrule when the entire optical connector plug is miniaturized and can be properly fitted. Is to provide.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a ferrule housed in a plug frame.
Between the connector and the inner peripheral surface of the plug frame.
Optical connector having a gap into which the sleeve holder of the connector is inserted
In the connector plug structure, an engagement hole is formed in the plug frame.
And a step on the inner surface of the plug frame.
Provided and engages with the stop ring so that it can be disengaged from the engagement hole.
Provide an engaging projection to hold the ferrule with a holder
At the same time, a flange is provided on this holder,
Insert washer, ferrule and spring into the arm
And the stop at the rear of the plug frame.
Inserting a ring, the engagement protrusion of the stop ring
Part is engaged with the engagement hole of the plug frame,
Compress the spring with a stop ring,
The flange of the holder by the washer
And hit the step portion of the plug frame through the
The ferrule is fixed.

[0008]

[Action] With this configuration, even with a small step portion, washer abuts on the stepped portion, the ferrule washer
Since the collar portion of the held holder abuts, the ferrule is sufficiently supported, the ferrule does not run out, and the optical connector plug can be normally fitted even when the whole optical connector plug is reduced in size.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 is an exploded perspective view of the optical connector structure, FIG.
FIG. 3 is a partially sectional side view of the optical connector plug structure according to the present invention, FIG. 3 is a plan view thereof, and FIG. 4 is a front view thereof. The same or corresponding portions as those in FIGS. 5 to 7 which describe the conventional example are denoted by the same reference numerals.

The optical connector structure comprises a male optical connector a and a female optical connector b. An optical connector plug 1 and a sleeve holder 2 are attached to the male optical connector a. That is, the optical connector plug 1 is inserted into each of the optical connector plug mounting holes 6a of the insulating housing 6 of the male optical connector a from the rear thereof. The lance portion (not shown) provided in the optical connector plug 1
Has been fixed. The sleeve holder 2 has two large and small flanges 4 and 5 on the outer peripheral surface thereof, and both sides of these flanges 4 and 5 are cut off. These sleeve holders 2 are mounted on the front end of each optical connector plug mounting hole 6a of the male optical connector a, and the ferrule 16 of the optical connector plug 1 is inserted into the sleeve holder 2.

The female optical connector b has an outer housing 7, an inner housing 8, and a rear housing 9, and the rear housing 9 is connected to the outer housing 7 by a stopper member 10, and the inner housing 8 is
It is movably housed inside.

The optical connector plug 12 is attached to the female optical connector b thus configured. That is,
As shown in FIGS. 2 to 4, the optical connector plug 12 includes a knob 13 made of synthetic resin, a plug frame 14, a stop ring 15, a ferrule 16, a washer 16a, and a spring 17. From the front side to the rear side, a pair of openings 18 and a pair of finger hooks 1
9 and a pair of windows 20 are formed, and the plug frame 14 has a pair of locking portions 21 from the front to the rear.
And a pair of rear stopper portions 22 and a pair of engagement hole portions 23 are formed. The stop ring 15 is made of metal,
A pair of engaging projections 24 and a stopper 25 are formed from the front side to the rear side. The ferrule 16 is held by a holder 26, and a flange 27 is formed on the holder 26. An optical cable (not shown) is connected to the ferrule 16.

The rear side surface portion 24a of the engaging projection 24 of the stop ring 15 is inclined backward by an angle X with respect to the axis of the stop ring 15, as shown in an enlarged view of FIG. I have. The rear side surface 23a of the engagement hole 23 of the plug frame 14 is inclined rearwardly by an angle X with respect to the axis of the plug frame 14.

Then, a washer 16a, a ferrule 16 and a spring 17 are inserted into the plug frame 14, and a stop ring 15
, The engagement protrusion 24 of the stop ring 15 is engaged with the engagement hole 23 to compress the spring 17, and the front end of the spring 17 is pressed against the flange 27 of the holder 26 of the ferrule 16. , The flange 27 is attached to the washer 16a.
The ferrule 16 is fixed by abutting the front edge of the washer 16a against the step 14a on the inner surface of the plug frame 14. A caulking sleeve 28 is placed over the rear part of the stop ring 15, and the rear part of the caulking sleeve 28 is caulked by a caulking member 29, and the optical cable is fixed to the stop ring 15 side.

The engagement projection 24 of the stop ring 15
As shown in FIG. 2 (2), the rear side surface portion 24 of the engagement protrusion portion 24 inclined rearwardly by the angle X is engaged with the engagement hole portion 23.
a is brought into contact with the rear side surface portion 23a of the engagement hole portion 23, which is inclined rearward by the angle X.

[0016] The holder 30 extends from the swaging sleeve 28 to the optical cable. A knob 13 is put on the plug frame 14, and a locking portion 21 and a rear stopper 22 of the plug frame 14 are inserted into an opening 18 of the knob 13.
In a state where the second member 2 is in contact with the rear edge 18a of the opening 18, there is a gap between the locking portion 21 and the front edge 18b of the opening 18, and the knob 13 can move forward and backward by this gap.

The optical connector plug 1 thus configured
2 is inserted into each optical connector plug mounting portion (not shown) of the rear housing 9 from the rear thereof, inserted into the optical connector plug mounting portion 8a of the internal housing 8, and engaged with the locking portion of these optical connector plugs 12. The optical connector plug 12 is attached to the female optical connector b by engaging a lance (not shown) with 21.

The optical connector plug 1 mounted on the male optical connector a is provided with a knob 1 from the optical connector plug 12.
3 has the same configuration as that of FIG.

In the above embodiment, the spring 17
Flange 27 of the holder 26 of the ferrule 16 due to the urging force of
Is fixed to the step 14a on the inner surface of the plug frame 14 via the washer 16a, so that even if the step 14a is small, the washer 1 is attached to the step 14a.
6a and the flange 27 of the holder 26 of the ferrule 16 against the washer 16a.
6 is sufficiently supported, and the ferrule 16 does not run out. Therefore, even when the entire optical connector plug is reduced in size, it can be normally fitted.

[0020]

As described above, according to the present invention, a washer, a ferrule, and a spring are inserted into a plug frame, and a stop ring is inserted into a rear portion of the plug frame. The spring is compressed by the stop ring by engaging with the engaging hole of the frame, and the ferrule is held by the urging force of this spring.
The ferrule was fixed by contacting the flange of the holder with the step on the inner surface of the plug frame via the washer, so even if the step was small, the washer abutted on this step, and the ferrule was attached to this washer. In order for the collar of the holder to abut,
Since the ferrule is sufficiently supported, the ferrule does not run out, and can be normally fitted even when the entire optical connector plug is reduced in size.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an optical connector structure.

FIG. 2A is a partially sectional side view of an optical connector plug structure according to the present invention. (2) FIG. 2 (1) is an enlarged view of a portion A. (3) FIG. 2 (1) is an enlarged view of a portion B.

FIG. 3 is a plan view of the optical connector plug structure.

FIG. 4 is a front view of the optical connector plug structure.

FIG. 5 is a partially sectional side view of a conventional optical connector plug structure.

FIG. 6 is a plan view of the optical connector plug structure.

FIG. 7 is a front view of the optical connector plug structure.

[Explanation of symbols]

 14 Plug Frame 14a Step 15 Stop Ring 16 Ferrule 16a Washer 17 Spring 23 Engagement Hole

Continuing on the front page (72) Inventor Shinichi Iwano 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation (72) Inventor Yasuhiro Ando 1-16-1 Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Stock Within the company (72) Inventor Tateomi Matsumoto 5-5-23 Osaki, Shinagawa-ku, Tokyo Hirose Electric Co., Ltd. (72) Inventor Takashi Nishiyama 5-5-23-Osaki, Shinagawa-ku, Tokyo Hirose Electric Co., Ltd. (56) References JP-A-62-79405 (JP, A) JP-A-61-33008 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) G02B 6/38

Claims (1)

(57) [Claims] 1. Ferrule housed in a plug frame
Optical connector between the plug and the inner peripheral surface of the plug frame.
Optical connector having a gap into which the sleeve holder of the connector is inserted
In the plug structure, an engagement hole is provided in the plug frame, and
A step is provided on the inner surface of the lug frame, and it is in front of the stop ring.
An engaging projection is provided for engaging and disengaging the engagement hole.
Hold the ferrule with a holder and
A flange is provided, and a washer, the ferrule, and a thread are provided in the plug frame.
Insert the plug and the back of the plug frame
Insert the stop ring into the stop ring
The engagement protrusion of the plug frame to the engagement hole
And compress the spring with the stop ring
And the flange of the holder is operated by the urging force of the spring.
Through the washer to the step of the plug frame.
An optical connector plug structure, wherein the ferrule is fixed to a part .