JP3748925B2 - Optical connector - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an optical connector, and more particularly to a multi-fiber optical connector.
[0002]
[Prior art]
Conventionally, an MT connector shown in FIG. 3A and an MPO connector in which a connection surface of FIG.
Both (a) and (b) in the figure
10 is the body of the ferrule,
12 is an adhesive injection window;
14 is an optical fiber insertion hole,
Reference numeral 16 denotes a guide pin hole.
Although (a) and (b) have almost the same structure, in the case of the MPO connector of (b), the front end face 100 is inclined.
[0003]
[Problems to be solved by the invention]
The main body 10 of these connectors is usually an all-plastic molded product.
Therefore, although slightly, as shown in FIG. 4, the thermosetting resin may be warped in the longitudinal direction.
When warping occurs,
・ It becomes difficult to polish the connector end face in parallel.
Since the guide pin hole 16 over which the positioning guide pin is bridged is also bent at the same time, the guide pin does not enter the pin hole.
・ Pushing at the time of connection cannot be applied in parallel (MT and MPO connectors are clamped from both sides with clips when connected)
In particular, the products that require high precision were affected.
In particular, since the MPO connector is a connection without a refractive index matching agent, the polishing angle of the front end face 100 is extremely important, and the influence of the warping of the ferrule is large.
[0004]
[Means for Solving the Problems]
As illustrated in FIG.
The reinforcing member 20 is embedded in the longitudinal direction of the ferrule body 10,
The reinforcing member 20 prevents the ferrule from warping in the longitudinal direction.
[0005]
Further, as illustrated in FIG. 2, the reinforcing member 20 may be attached to the outside of the main body 10.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
The reinforcing member 20 is made of a long plate-like or round bar-like material having high bending rigidity, such as ceramics, metal, or high-hardness resin. Moreover, it is set as the cross-sectional shape from which a section modulus becomes large with respect to curvature.
[0007]
The reinforcing member 20 is preferably provided over the entire length of the main body 10 in the longitudinal direction.
Further, it is desirable that the place to be provided is near the guide pin hole 16 in view of the ferrule structure.
[0008]
The reinforcing member 20 is embedded or attached externally by insert molding, that is, by a molding method in which the reinforcing member 20 is placed in advance in a mold and resin-molded around it.
[0009]
[Example 1]
Fig.1 (a) is a front view, The B cross section is shown in (b).
The reinforcing member 20 is an elongated rectangular plate-like material, and the material is appropriately selected from those described above.
This is embedded outside both guide pin holes 16 along the optical fiber direction of the ferrule body 10, ie, along the longitudinal direction, preferably over the entire length.
[0010]
The embedded reinforcing member 20 is
-Channel shape (C-shaped cross section) (Fig. 1 (c)),
-Place plate-like objects above and below the guide pin hole 16 (d),
A cylindrical object surrounding the guide pin hole 16 (e),
・ Make multiple rods (f),
Etc.
[0011]
[Example 2]
Further, as shown in FIG. 2A, plate-like reinforcing members 20 may be attached to both side surfaces of the ferrule body 10.
Also in this case, the channel-shaped reinforcing member 20 as shown in FIG.
Moreover, you may embed in the surface of the both sides of a ferrule main body like (c).
[0012]
【The invention's effect】
Since warpage in the connector longitudinal direction after molding or during molding can be prevented,-Polishing angle of connector end face,
・ Bend guide pin hole,
・ Pressing direction when connecting,
Etc. can be improved, and a highly accurate multi-fiber optical connector can be manufactured.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of Embodiment 1 of the present invention.
FIG. 2 is an explanatory diagram of Embodiment 2 of the present invention.
3A is an explanatory diagram of an MT connector, and FIG. 3B is an explanatory diagram of an MPO connector.
FIG. 4 is an explanatory diagram of a state in which a ferrule is warped.
[Explanation of symbols]
10 Ferrule body 100 Front end face 12 Window 14 Optical fiber insertion hole 16 Guide pin hole 20 Reinforcing member

Claims (2)

It has a round bar-like reinforcing member embedded over the entire length in the longitudinal direction of the ferrule for MT connector or MPO connector and having an adhesive injection window,
The reinforcing member is embedded on both sides of the ferrule,
A pair of guide pin holes over which positioning guide pins are bridged are arranged between the reinforcing members on both sides of the ferrule, and the reinforcing members on both sides and the pair of guide pin holes are arranged side by side,
An optical connector, wherein the reinforcing member prevents warping in the longitudinal direction of the ferrule. A plurality of the reinforcing members are provided on both sides of the ferrule so as to be arranged at intervals from each other in a direction perpendicular to the direction in which the guide pin holes and the reinforcing members are arranged side by side. The optical connector according to claim 1.

Images