(a) Field of the Invention
The present invention relates to a wiring device for optical fiber, which uses an optical plug receptacle for connecting an optical fiber cable introduced inside the wall or under the floor of a building.
(b) Description of the Related Art
Conventionally, a wiring device for optical fiber in which an optical fiber cable wired inside a building is introduced into a flush box laid in the wall surface of the building and an optical plug receptacle being attached to a flush box using a mounting frame standardized based on a flush type wiring device is used is disclosed (for example, see Japanese Examined Patent Application Publication No. 2,793,183).
In the above-mentioned wiring device for optical fiber, there is a problem in that, even though the optical fiber plug is not connected to the optical plug receptacle from the outer surface side of the building, the optical plug receptacle is projected forward more than the front surface of the wiring device, which causes an obstruction.
There is also conventionally disclosed the wiring device for optical fiber, comprising: a rotatable retainer with the optical plug receptacle attached at the rear surface side being disposed at an aperture formed at the front surface of the plug receptacle main body such that the optical plug receptacle can be received in the plug receptacle main body at non-used state, wherein the rotatable retainer is rotatably supported to the plug receptacle main body so as to keep a projected state in which the rotatable retainer is projected toward the front side from the front surface of the plug receptacle main body to face a plug connection hole toward outward of the plug receptacle main body or a received state in which a plug connection hole is received in the plug receptacle main body; pressing means for normally pressing the rotatable retainer toward the front side; retaining means for retaining the received state; and a pop-up mechanism for projecting the optical plug receptacle toward the front side when the maintenance of the retaining means is released.
The optical plug receptacle used in the above-mentioned wiring device for optical fiber comprises a plug connection portion into which an optical fiber plug attached to an optical fiber cable wired to the inside of a building is inserted and connected. The optical plug receptacle optically connects an optical fiber plug inserted through a plug connection hole from the outer surface side of a building and the optical fiber plug connected to the plug connection portion. However, the optical plug receptacle is attached to the rear side of the rotatable retainer such that, when the plug receptacle main body is attached to a attaching surface in the normal direction, the plug connection hole faces the downward direction (that is, the direction of insertion into the plug connection hole is nearly in parallel with the front surface of the plug receptacle main body). As a result, when the optical fiber plug is inserted into and connected to the plug connection portion of the optical plug receptacle, this operation is obstructed by the transverse wall of the plug receptacle main body, which it is impossible to carry out a connection work of the optical fiber plug, thereby leads to deterioration in the performance of construction work.