Patent ID: 8356762
Filing Date: 2013-01-22
Classification: B60R

Abstract:
1. An assembly to be provided on a vehicle having an engine room, the assembly comprising: a wall of the engine room, the wall having an inner surface; an on-vehicle circuit unit that includes a circuit board having a power circuit, a heat radiating member having an inner surface to which the circuit board is fixed in a manner that enables heat conduction and an outer surface functioning as a heat radiating surface, and a unit casing surrounding the circuit board and fixed to the inner surface of the heat radiating member in a manner that does not impede the heat conduction between the circuit board and the heat radiating member; and a box case other than the heat radiating member and the unit casing, the box case constituting an electric connection box and incorporating the on-vehicle circuit unit including the unit casing and the heat radiating member and other circuit components while exposing the outer surface of the heat radiating member of the on-vehicle circuit unit to an outside of the box case, wherein the heat radiating member has a mounting part which is fixed to the wall so as to make contact with the wall, and the box case has a mounting portion which is fixed to a second surface of the engine room, the mounting part and the mounting portion being fixed to the wall and the second surface respectively so as to make the outer surface of the heat radiating member face the inner surface of the wall of the engine room with a clearance to thereby achieve a heat transfer by radiation from the heat radiating member to the wall.