Sumitomo Wiring Systems, Limited

Hisaki Mayumi

Tatsuya Sumida

Yuuji Saka

Noriko Kobayashi

Koji Kasai

Nobuchika Kobayashi

An electrical junction box for a vehicle has a casing, and an electrical circuit comprising a fuse connection circuit, a relay connection circuit and a connector connection circuit. The casing has, at opposite sides, connector sockets for electrical connectors. In the casing is a connector module comprising a plurality of insulation substrates stacked one on another and parallel elongated bus bars on a first surface of each substrate and parallel flexible conductors on a second surface of the substrate, which extend orthogonally to said bus bars. Each said insulation substrate has apertures through it at which the bus bars and flexible conductors are connected to each other to provide desired circuit connections. The bus bars extend from the insulation substrates and provide tabs projecting into the connector sockets. A thin junction box is obtained.

Electrical junction box for a vehicle

An electrical junction box for a vehicle has a casing, and an electrical circuit. The electrical circuit has a fuse connection circuit, a relay connection circuit and a connector connection circuit. The casing has, at opposite sides, connector sockets for electrical connectors. A connector module in the casing has a plurality of insulation substrates stacked one on another and parallel elongated bus bars on a first surface of each substrate and parallel flexible conductors on a second surface of the substrate, which extend orthogonally to the bus bars. Each insulation substrate has apertures through it at which the bus bars and flexible conductors are connected to each other to provide desired circuit connections. The bus bars extend from the insulation substrates and provide tabs projecting into the connector sockets. A thin junction box is obtained.

An electrical junction box for a vehicle provides electrical connection to electrical connectors, fuses and relays. Upper and lower case parts of a casing contain a base circuit, a fuse circuit and a relay circuit. The base circuit has first bus bars and insulation layers stacked together. The first bus bars connect to electrical connectors in use. The fuse circuit has a substrate which is discrete from the base circuit, and second bus bars providing connection to fuses in use. The relay circuit has a substrate, which is discrete from said base circuit, and third bus bars providing connection to relays in use. The second bus bars and the third bus bars are joined to the first bus bars by welding. A compact construction which is easily modified is obtained.

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Yokkaichi, Japan

Hisaki Mayumi