Matsushita Electric Works, Ltd.

Sumitomo Electric Industries, Limited

Seikoh Giken Co., Ltd.

Yoshihiro Shogaki

Yukihiro Yokomachi

Masaru Yoshida

Yasuichi Kinekawa

Satoru Tanaka

Hirofumi Konishi

Kenichiro Ohtsuka

Hiroaki Okada

Daizo Nishioka

Yoshiaki Ueno

Shinji Morino

Haruhiko Hyosu

Junji Taira

Toshifumi Sakamoto

Haruhiro Kuboyama

Haruo Ogawa

Jun Tokuda

Toshiaki Inage

Housing of connector plug for optical fiber

Optical communication connector

There is provided wiring device for optical fiber capable of increasing the performance of construction work. A coveris disposed in an aperture formed at front surface of the plug receptacle main body, the upper end thereof is rotatably supported to the plug receptacle main body, and a receptacleis attached to the rear surface side of the cover. The receptaclehas a plug connection hole facing an outer surface side of a building at least at a used state and a plug connection portion into which a first optical-fiber plug being attached to the optical fiber cable wired to the inside of the building is inserted and connected, and optically connects the first optical fiber being connected to the plug connection portion and a second optical-fiber plug inserted from the outer surface side of the building through the plug connection hole. A notchfor inserting the first optical-fiber plug is formed at a sidewallof the plug receptacle main bodywhich is located in the inserting direction of the optical fiber plug inserted and connected to the plug connection portion.

Wiring device for optical fiber

There is provided wiring device for optical fiber capable of increasing the performance of connection work of an optical fiber cable without deteriorating a signal transmitting properties of the optical fiber cable. The wiring device comprise a plug receptacle main body which is mounted on a mounting opening opened in the outer surface of a building, a receptacle being provided to the plug receptacle main body and having a plug connection hole facing an outside of the plug receptacle main body, a winder including a winding body which has an outer circumferential surface of radius of curvature larger than the permitted minimum radius of curvature of an optical fiber cable wired to the inside of a building and connected to the receptacle and on which a core wire of the optical fiber cable is wound, and a retainer being provided on the plug receptacle main body to maintain the winder inner side of a building, in which the receptacle for optical fiber and the winder are arranged in parallel with each other in the front-back direction, and pressing pieces are formed integrally with the winder and the retainer for contacting the bent portion of the core wires to prevent the bent portion from being expanded.

A wireless transmission system includes a plurality of terminal units, a specific one of which is provided with a transmission/receiving circuit that transmits a reference signal of a local oscillation frequency, while all others of which are provided respectively with a transmission/receiving circuit that prepares, on the basis of the reference signal received, a local oscillation frequency signal for frequency conversion of transmitting/receiving frequency signal and intermediate frequency signal, to thereby realize the system at lower costs even when a high local oscillation frequency is employed.

Wireless transmission/reception system including transmitting terminal

Growing community of inventors

Osaka, Japan

Yoshihiro Shogaki