Hitachi, Ltd.

Daiichi Denshi Kogyo Kabushiki Kaisha

Hiroshi Kozai

Fumiyuki Kobayashi

Tamotsu Tsukaguchi

Morio Suzuki

Norio Sengoku

Toshio Mori

Toshiaki Suzuki

Matsuo Katoh

A power supply construction comprises a logic circuit section housed in a frame, a power supply section mounted rotatably on the frame in opposed to the logic circuit section for supplying power to the logic circuit section. Relay bars with an end arranged in the vicinity of the rotating axis of the power supply section are provided for supplying power to the logic circuit section. Power supply bars with an end arranged in the vicinity of the rotating axis are for outputting the voltages from the power supply section. In addition, a flexible conductor is provided for electrically connecting the relay bar and the power supply bar in such a manner that the power supply section is rotatable.

Power supply structure and system for mounting the same

A contact of a connector made of an elongated resilient material and having an inner end fixed to a connector housing and a midway to be in contact with a mating contact of another connector. According to the invention, the contact comprises a substantially straight portion extending from a contacting portion of the midway with the mating contact to the fixed inner end, and an outer portion being bent in zigzag extending from the contacting portion to the distal end abutting against a surface of the connector housing, thereby obtaining a sufficient contacting resilient pressure to realize stable and reliable connecting condition with the mating contact and simultaneously achieving small-sized connectors and high speed signal transmission.

Contact of connector

In a multilayer printed circuit board including a signal layer, a power supply layer, and through-holes, the shape of each of clearances formed on a power supply layer for the purpose of attaining insulation from through-holes is nearly a quadrangle having four circular corners. Thereby, the area of the power supply layer left between adjacent clearances is increased to suppress increase in electrical resistance at that portion.

Multilayer printed circuit board

Growing community of inventors

Hadano, Japan

Hiroshi Kozai