JP2000214350A - Optical connector plug - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the structure of an optical connector plug which stably performs measurement without an additional operation such as component exchange for total three kinds of optical connector adapters or receptacles, namely two kinds of JIS generally used now and one partly modified from them. SOLUTION: This optical connector plug 10 to be connected to the adapter or the receptacle 40 of an optical connector provided with a cylindrical part 32 for guiding the optical connector plug 10 to be connected is provided with a binding cylindrical part 2 to be fitted to the guiding cylindrical part that is expandable/contractible in the radial direction, and the binding cylindrical part 2 is forcedly expanded/contracted to make it hold the guiding cylindrical part 32, thereby enabling it to be fixedly connected to plural kinds of optical connector adapters or receptacles having a differently-shaped connecting part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical connector for connecting an optical fiber used for optical communication and optical equipment to an optical equipment having a light receiving element or a light emitting element, and more particularly to various optical receptacles or optical connectors. The present invention relates to an optical connector plug connectable to an adapter.

[0002]

2. Description of the Related Art Conventionally, this type of connector has been disclosed in Japanese Utility Model Laid-Open Publication No. 62-110907 and Japanese Patent Laid-Open Publication
No. 12 (hereinafter referred to as prior arts 1 and 2 respectively)
Are disclosed.

FIG. 3 is a partial sectional view showing an optical connector shown in the prior art 1. As shown in FIG. 3, the optical connector includes a connector plug 100A connected to an optical fiber,
100B, 100C, receptacles 400A, 400B, 400C with one ends fitted therein, and shell 300 with the other ends of the receptacles 400A, 400B, 400C fitted.

The connector plugs 100A to 100C include a ferrule 101 connected to an end of an optical fiber, and a coupling nut 103 provided around the ferrule 101.

[0005] The receptacles 400A to 400C include a receptacle body 401 provided with a receiving hole 201 into which the ferrule 101 is fitted, and a fixed portion 402 provided around the receptacle body 401.
And a fitting portion 203 fitted to the coupling nut 103 of the plug.

[0006] The Shul 300 has a housing 304 on one end side in which the optical element 204 including a light emitting element or a light receiving element is housed, a fitting part 301 on the other end, and a hole 307 for connecting the fitting part 301. And a light receiving element support portion 306. The end face on the fitting part 301 side is attached to panel 500.

FIG. 4 is a sectional view showing an optical connector shown in the prior art 2. As shown in FIG. The connector shown in FIG. 4 has a configuration in which the connector plug 60 is not provided with a ferrule and the fiber cord 64 is directly fixed. As shown in FIG. 4, the receptacle 50 includes a fitting portion 51 with the plug 60 at one end, a large-diameter portion 52, and an element housing portion 53 at the other end.
The fitting portion 51 includes a hole 51a, a screw 51b on the opening side of the inner surface of the hole 51a, and a screw 52c on the outer large-diameter portion side. A through hole 54 is provided between the housing 53 and the hole 51.
Connected by An optical element 55 made of a semiconductor device is housed in the housing 53.

On the other hand, the connector plug 60 has a cylindrical portion 61.
, A taper portion 62 and a support portion 63 for supporting the fiber cord 64. The cylindrical portion 61 has a screw 61
a is provided and fitted with the screw 51c of the receptacle. The fiber cord 64 protrudes from the tip of the cylindrical portion 61, and the optical fiber 64a is exposed from the tip.

[0009]

As described above, various types of optical connectors are currently being developed and marketed, and the method of connecting and fixing the plug of the connector to the adapter or the receptacle is, for example, a screw fastening structure, a push-pull lock fastening structure. And so on.

[0010] However, depending on the use environment, there are cases where a plurality of types of optical connectors are assembled.
In this case, when trying to measure all the performances of the installed optical connectors, it is necessary to facilitate the same number of measurement master cords with optical connector plugs as the number of installed optical connectors. Each time the optical connector adapter or receptacle changes, it is necessary to change the master code attached to the measuring instrument,
Work efficiency is significantly reduced.

Therefore, a technical problem of the present invention is to add a component replacement or the like to a total of three types of optical connector adapters or receptacles obtained by changing two types of JIS generally used at present and a part thereof. An object of the present invention is to provide a structure of an optical connector plug that can stably perform a result without performing an operation and perform performance measurement.

[0012]

According to the present invention, in the optical connector plug to be coupled to an adapter or a receptacle of an optical connector having a guide cylindrical portion for guiding an optical connector plug to be coupled, the optical connector plug has a radial direction. It comprises a fastening cylindrical portion fitted to the extendable guiding cylindrical portion, and has a different coupling portion shape by forcibly expanding and contracting the fastening cylindrical portion and gripping the guiding cylindrical portion. An optical connector plug characterized by being capable of being fixedly connected to a plurality of types of optical connector adapters or receptacles.

According to the present invention, in the optical connector plug, an outer cylindrical portion is further provided outside the fastening cylindrical portion, and the fastening cylindrical portion is provided with a plurality of slits and expands and contracts in a radial direction. A taper portion is formed on the outer peripheral portion formed so that the slit is formed, and the outer cylindrical portion has a taper portion having the same shape as the taper portion on an inner peripheral surface corresponding to the taper portion and moves in the axial direction. By gripping the guiding cylindrical part of the adapter or the receptacle of the optical connector, which is formed so as to have different lengths and diameters,
An optical connector plug characterized by being configured so as to be capable of being coupled and fixed to a plurality of types of optical connector adapters or receptacles having different coupling section shapes.

Further, according to the present invention, there is provided an optical connector comprising: any one of the optical connector plugs; and an optical connector adapter or a receptacle fitted to the optical connector plug.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a half sectional view showing an optical connector according to an embodiment of the present invention.

As shown in FIG. 1, the optical connector includes an optical connector plug 10 and a receptacle 40.
The receptacle 40 is a JIS C 5973 type (SC
Type), a support portion 31 and a support portion 3
1, a guide cylindrical portion 32 having a through-hole 32a at the center and projecting therefrom, an engaging portion 33 on the outside thereof, and an outer cylindrical portion 34 on the outside thereof.

The optical connector plug 10 includes a cylindrical sleeve 1, a grip 2, and a ferrule 3.
The sleeve 1 has a large cylindrical portion 11 having projections 11a at both ends.
And a middle cylindrical portion 12 having a smaller diameter than the large cylindrical portion 11 and a small cylindrical portion 13 for fastening having a smaller diameter.
A tapered portion 13a is formed at the tip of the small cylindrical portion 13 so that the inner diameter gradually increases toward the end. The sleeve 1 is formed so as to be slidable in the axial direction with respect to the grip 2.

The grip 2 includes a supporting cylindrical portion 21, a fastening cylindrical portion 22 having a tapered portion 22a whose outer diameter gradually increases toward the distal end, and a cylindrical distal end portion 23. At the boundary portion with the portion 22a, the step portion 24 is formed so that the outer side is higher on the tip portion 23 side.
And a convex portion 25 is provided on the inside. Further, on the central axis, slits (not shown) are cut into one or a plurality at equal intervals so as to cut both the diameters.

The ferrule 3 has the same shape as a general optical connector plug, and houses one end of an optical fiber cable. Further, a coil spring 4 for urging a ferrule pressing force for urging the ferrule 3 in the insertion direction is provided in the grip 2.

When the optical connector according to the first embodiment having such a configuration is fitted, the sleeve 1 is fitted with the distal end portion 23 of the grip 2 completely covered by the guide cylindrical portion 22 of the receptacle 40. By advancing in the mating direction, the distal end of the grip 2 has a gripping force that overcomes the reaction force of the coil spring 4 because the tightening force with respect to the cylindrical portion 22 is increased, and the connector plug 10 is stably connected to the receptacle 40. It can be fixed and fixed.

FIG. 2 is a half sectional view showing an optical connector according to a second embodiment of the present invention. Referring to FIG.
The receptacle 41 includes a support portion 42, an outer cylindrical portion 44 protruding in a cylindrical shape, and a cylindrical portion 43 having an insertion hole 43 a into which the ferrule of the plug connector 10 is inserted.

Similarly, in the case of JIS C5970 type (FC type) having a somewhat smaller cylindrical outer shape, the receptacle 41 has a first embodiment in which the sleeve 1 of the optical connector plug 10 is slightly extended in the axial direction. As in the embodiment described above, it is possible to stably couple and fix to the adapter or the receptacle.

As described above, the optical connector plug 1 of the optical connector according to the first and second embodiments of the present invention.
0, when the optical connector plug 10 is coupled and fixed to two types of optical connector adapters or receptacles whose dimensions between the mechanical reference plane and the optical reference plane differ by about 0.3 mm. 7.84N to 11.76N, which is the ferrule pressing force at the time of connecting the optical connector plug
(0.8 kgf to 1.2 kgf) was obtained.

Further, F according to the second embodiment of the present invention is
Three types of a C-type receptacle, an SC-type receptacle according to the first embodiment of the present invention, and a slightly smaller jig detachable type are mounted so that the SC-type receptacle can be mounted at a higher density. Even if this is the case, it is possible to perform stable optical coupling to all optical connector receptacles or adapters without replacing the plug and without using a dedicated jig.

[0026]

As described above, according to the present invention,
Stable results without additional work such as component replacement for the three types of optical connector adapters or receptacles in which two types of JIS that are currently generally used and part of them are changed, and the performance is measured. Can be provided.

[Brief description of the drawings]

FIG. 1 is a half sectional view showing an optical connector according to a first embodiment of the present invention.

FIG. 2 is a half sectional view showing an optical connector according to a second embodiment of the present invention.

FIG. 3 is a cross-sectional view showing an optical connector according to Prior Art 1.

FIG. 4 is a cross-sectional view showing an optical connector according to a conventional technique 2.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sleeve 2 Grip 3 Ferrule 4 Coil spring 10 Optical connector plug 11 Large cylindrical part 11a Protrusion 12 Medium cylindrical part 13 Small cylindrical part 13a Tapered part 21 Support cylindrical part 22a Tapered part 23 Tip part 24 Step part 25 Convex part 31 Support part 32 Cylindrical part 32a Through hole 33 Engagement part 34 Outer cylindrical part 40, 41 Receptacle 42 Support part 44 Outer cylindrical part 43a Insertion hole 50 Receptacle 51 Fitting part 51a Hole 51b, 51c Screw 52 Large diameter part 53 Element accommodation part 54 Penetration Hole 55 Optical element 60 Connector plug 61 Cylindrical part 61a Screw 62 Taper part 63 Support part 64 Fiber cord 64a Optical fiber 100A, 100B, 100C Connector plug 101 Ferrule 103 Coupling nut 201 Housing hole 203 Fitting part 204 Optical element 00 shell 301 fitting portion 304 accommodating portion 306 receiving element support part 307 holes 400A, 400B, 400C receptacle 401 receptacle body 402 fixed portion 500 Panel

Claims (3)

[Claims] 1. An optical connector plug coupled to an adapter or a receptacle of an optical connector having a guide cylindrical portion for guiding an optical connector plug to be coupled, the optical connector plug being fitted to the radially expandable and contractible guide cylindrical portion. By providing a fastening cylindrical portion to be combined, by forcibly expanding and contracting the fastening cylindrical portion and gripping the guide cylindrical portion, a plurality of types of optical connector adapters or receptacles having different coupling portion shapes are provided. An optical connector plug characterized in that it can be connected and fixed. 2. The optical connector plug according to claim 1, further comprising an outer cylindrical portion outside the fastening cylindrical portion, wherein the fastening cylindrical portion is provided with a plurality of slits so as to be expandable and contractible in a radial direction. A tapered portion is formed on the outer peripheral portion where the slit is formed, and the outer cylindrical portion is provided with a tapered portion having the same shape as the tapered portion on an inner peripheral surface corresponding to the tapered portion and is movable in the axial direction. By gripping the guide cylindrical portion of the optical connector adapter or receptacle formed and having different lengths and diameters, the optical connector can be coupled and fixed to a plurality of types of optical connector adapters or receptacles having different coupling portion shapes. An optical connector plug characterized by being constituted. 3. An optical connector, comprising: the optical connector plug according to claim 1; and an optical connector adapter or a receptacle fitted to the optical connector plug.