JPH0545540A - Optical connector plug structure - Google Patents

Abstract

PURPOSE:To prevent a ferrule from swinging and to reduce the size of the whole optical connector plug by bringing the frange part of the holder of a ferrule into contact with the step part of a plug frame via a washer with the energizing force of a spring and fixing the ferrule. CONSTITUTION:The washer 16a, ferrule 16, and spring 17 are inserted into a plug frame 14 and a stop ring 15 is inserted into a plug frame 12; and the detaining projection part 24 of the stop ring 15 is engaged with the engagement part 23 of the plug frame 12 and the spring 17 is compressed by the stop ring 15. Then the flange part 27 of the holder 26 of the ferrule 16 is brought into contact with the step part 14a of the plug frame 12 via the washer 16a with the energizing force of the spring 17 and the ferrule 16 is fixed. Namely, even when the step part 14a is small, the washer 16a collides with the step part 14a, so the ferrule 16 is supported sufficiently. Therefore, even when the whole body is made small in size, normal fitting is possible.

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, as shown in FIG. 5, an engaging hole 23 is formed in a plug frame 14 and an engaging projection 2 is formed on a stop ring 15.
4 to form the ferrule 16 in the plug frame 14.
Insert the spring 17 and the plug frame 1
4, the stop ring 15 is inserted into the rear portion of the stopper ring 4, the engaging projection 24 of the stop ring 15 is engaged with the engaging hole 23, and the spring 17 is compressed. The flange portion 27 of the holder 26 is applied to the step portion 14a on the inner surface of the plug frame 14 so that the ferrule 16
There is a fixed one.

[0003]

However, in the conventional example, the optical connector plug itself is large in size, and this optical connector plug is used for a large-sized optical connector. Development of a small optical connector was requested, and miniaturization of the optical connector plug used for this optical connector was also requested.

Under these circumstances, there is a plug frame and a stop ring that are made thinner and the outer dimensions of the optical connector plug are made smaller. However, even if the diameter of the plug frame is reduced, a gap is required for inserting the sleeve holder between the ferrule housed in the plug frame and the inner peripheral surface of the plug frame. Therefore, there is a limit in reducing the inner diameter of the plug frame. Therefore, the stepped portion on the inner surface of the plug frame with which the flange portion of the ferrule abuts cannot be increased.

The ferrule is fixed by pressing the collar of the ferrule holder against the step on the inner surface of the plug frame by the biasing force of the spring. There is a problem that the support is not sufficient and the ferule is shaken, so that the optical connector plugs are not fitted to each other.

The present invention solves the above problems, and an object of the present invention is to provide an optical connector plug structure in which when the entire optical connector plug is downsized, the ferrule swing can be minimized and fitted properly. To provide.

[0007]

In order to achieve the above object, the present invention inserts a washer, a ferrule and a spring into a plug frame, and a stop ring into a rear portion of the plug frame, The engaging projection of the stop ring is engaged with the engaging hole of the plug frame to compress the spring with the stop ring, and the urging force of the spring causes the collar of the ferrule holder to be inserted through the washer into the plug frame. It is characterized in that the ferrule is fixed by hitting the step portion on the inner surface.

[0008]

With this construction, even if the step portion is small, the washer abuts against this step portion, and the collar portion of the ferrule holder abuts against this washer, so that the support of the ferrule is sufficient. As a result, the deflection does not occur in the ferrule, and even when the entire optical connector plug is downsized,
Can be fitted normally.

[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. 4 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. It should be noted that the same or corresponding parts as those in FIGS. 5 to 7 for explaining the conventional example are denoted by the same reference numerals.

The optical connector structure comprises a male side optical connector a and a female side 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 plugs 1 are inserted into the respective optical connector plug mounting holes 6a of the insulating housing 6 of the male optical connector a from the rear side thereof, and the insulating housing 6 is inserted into the locking portions 21 of these optical connector plugs 1. The optical connector plug 1 is engaged with a lance portion (not shown) provided on the
Is fixed. The sleeve holder 2 is provided with two large and small flange portions 4 and 5 on the outer peripheral surface thereof, and both sides of the flange portions 4 and 5 are cut off. These sleeve holders 2 are attached to the front ends of the respective optical connector plug attachment holes 6a of the male optical connector a, and the ferrules 16 of the optical connector plug 1 are inserted into the sleeve holder 2. There is.

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

An optical connector plug 12 is attached to the female optical connector b thus constructed. That is,
As shown in FIGS. 2 to 4, the optical connector plug 12 is provided with a synthetic resin knob 13, a plug frame 14, a stop ring 15, a felt 16, a washer 16a and a spring 17, and the knob 13 has , A pair of openings 18 and a pair of finger hooks 1 from the front side to the rear side thereof
9 and a pair of windows 20 are formed, and the plug frame 14 has a pair of locking portions 21 from the front side to the rear side.
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 protrusions 24 and stoppers 25 are formed from the front side to the rear side. The ferrule 16 is held by a holder 26, and a flange portion 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 portion 24 of the stop ring 15 is inclined rearward with respect to the axis of the stop ring 15 by an angle X as shown in the enlarged view of FIG. 2 (2). There is. Further, the rear side surface portion 23a of the engaging hole portion 23 of the plug frame 14 is inclined rearward with respect to the axis of the plug frame 14 by an angle X.

A washer 16a, a ferrule 16 and a spring 17 are inserted into the plug frame 14, and a stop ring 15 is provided at the rear of the plug frame 14.
Is inserted, the engaging protrusion 24 of the stop ring 15 is engaged with the engaging hole 23 to compress the spring 17, and the front end of the spring 17 is fitted to the flange 27 of the holder 26 of the ferrule 16. Press the collar 27 and push the collar 27 into the washer 16a.
The front edge of the washer 16a is brought into contact with the step 14a on the inner surface of the plug frame 14 to fix the ferrule 16. The rear part of the stop ring 15 is covered with a caulking sleeve 28, and the rear part of the caulking sleeve 28 is caulked by a caulking member 29 so that the optical cable is fixed to the stop ring 15 side.

The engaging projection 24 of the stop ring 15
2 is engaged with the engaging hole portion 23, the rear side surface portion 24 of the engaging projection portion 24 inclined rearward by the angle X as shown in FIG.
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.

The caulking sleeve 28 and the optical cable are covered with a holder 30. The plug frame 14 is covered with a knob 13, and an engaging portion 21 and a rear stopper portion 22 of the plug frame 14 are inserted into an opening 18 of the knob 13, and the rear stopper portion 2
When 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 back and forth by this gap.

The optical connector plug 1 thus constructed
2 is inserted into each optical connector plug mounting portion (not shown) of the rear housing 9 from the rear side thereof, and is inserted into the optical connector plug mounting portion 8a of the inner housing 8, and these optical connector plug 12 locking portions are provided. A lance portion (not shown) is engaged with 21 to attach the optical connector plug 12 to the female optical connector b.

The optical connector plug 1 to which the male side optical connector a is mounted has the knob 1 from the optical connector plug 12.
It has the same structure as the one with 3 removed.

In the above embodiment, the spring 17
The flange portion 27 of the holder 26 of the ferrule 16 by the biasing force of the
Is fixed to the step portion 14a on the inner surface of the plug frame 14 through the washer 16a to fix the ferrule 16, so that even if the step portion 14a is small, the washer 1 is attached to the step portion 14a.
6a collides with each other, and the flange portion 27 of the holder 26 of the ferrule 16 collides with the washer 16a.
6 is sufficiently supported so that the ferrule 16 does not swing. Therefore, even when the entire optical connector plug is downsized, it can be fitted properly.

[0020]

As described above, according to the present invention, the washer, the ferrule, and the spring are inserted into the plug frame, and the stop ring is inserted into the rear portion of the plug frame, so that the engaging protrusion of the stop ring is inserted. To engage the engaging hole of the plug frame and compress the spring with the stop ring, and the urging force of this spring causes the collar of the ferrule holder to be applied to the step on the inner surface of the plug frame through the washer. Since the ferrule is fixed, even if the step is small, the washer abuts on this step, and the collar of the ferrule holder abuts on this washer.
Since the support of the optical fiber is sufficiently carried out, the vibration does not occur in the ferule, and the optical connector plug can be normally fitted even when it is downsized.

[Brief description of drawings]

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

FIG. 2 is a side view, partly in section, of the optical connector plug structure according to the present invention. (2) It is an enlarged view of A part of FIG. (3) It is an enlarged view of part B in FIG.

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 side view, partly in cross section, 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

Front page continuation (72) Inventor Shinichi Iwano 1-1-6 Uchisaiwai-cho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation (72) Inventor Yasuhiro Ando 1-1-6 Uchisai-cho, Chiyoda-ku, Tokyo Nihon Telegraph Telephone Co., Ltd. (72) Inventor Tatsuomi Matsumoto 5-5-23 Osaki, Shinagawa-ku, Tokyo Hirose Electric Co., Ltd. (72) Takashi Nishiyama 5-5-23 Osaki, Shinagawa-ku, Tokyo Hirose Electric Co., Ltd. Within

Claims (1)

[Claims] 1. A washer and a felt member in a plug frame.
And the spring, insert a stop ring in the rear part of the plug frame, engage the engaging protrusion of the stop ring with the engaging hole of the plug frame, and compress the spring with the stop ring. An optical connector plug structure characterized in that the flange of the ferrule holder is pressed against the stepped portion on the inner surface of the plug frame by a biasing force of the ferrule to fix the ferrule.