Patent ID: 8310085
Filing Date: 2012-11-13
Classification: B60R,H05K

Abstract:
1. An electrical junction box for a vehicle, comprising: a power distribution circuit for distributing a power source mounted on a vehicle to a plurality of vehicle-mounted loads; a plurality of switching elements provided on said power distribution circuit for turning on and off current-carrying between said power source and said vehicle-mounted loads; a control circuit for controlling an on-off action of said plurality of switching elements; a power distribution unit for constituting a part of said power distribution circuit; and a circuit board having a board body in which said control circuit is incorporated; wherein said board body of said circuit body is divided into a power distribution circuit region and a control circuit region by a border line across said board body, said control circuit region is provided with a conductive pattern for forming said control circuit and with a control circuit element, said power distribution circuit region is provided with a part of said plurality of switching elements and with a conductive pattern for connecting said part of said plurality of switching elements to said power source and said vehicle-mounted loads; wherein said plurality of switching elements provided on said power distribution circuit region includes only switching elements having load currents smaller than those of said plurality of switching elements included in said power distribution unit; and wherein said power distribution circuit region on said circuit board is provided with power distribution connecting portions for electrically interconnecting said power distribution circuit on said power distribution circuit region and said power distribution circuit constructed by said power distribution unit, said power distribution circuit region on said circuit board includes a particular one of said switching elements having a pair of current-carrying terminals provided in said power distribution circuit on said power distribution circuit region and a control terminal to which a control signal is applied to turn on and off current-carrying between said current-carrying terminals, said current-carrying terminals of said particular one of said switching elements is connected through said conductive pattern on said power distribution circuit region to said power distribution connecting portions, and said control terminal of said particular one of said switching elements is connected through a conductive pattern led out of said control circuit region to said control circuit.