Patent ID: 7580265

Claim:
A heat sink that radiates n exoergic circuit elements mounted on a circuit board, where n is equal to or greater than 2, said heat sink comprising: a housing that has a heat-receiving surface that receives heat from the n exoergic circuit elements; and n+2 fixture parts to each of which a fixture member is attachable, each fixture member compressively fixing said housing onto the circuit board, wherein the heat sink is used to commonly radiate the n exoergic circuit elements, and wherein the n+2 fixture parts include four fixture parts configured to fix adjacent first and second ones of the exoergic circuit elements, the four fixture parts including a pair of first, diagonally arranged, fixture parts and a pair of second, diagonally arranged, fixture parts, the first exoergic circuit element being located inside of a first triangular area having vertices at the pair of first fixture parts and a first one of the second fixture parts and outside of a second triangular area having vertices at the pair of first fixture parts and a second one of the second fixture parts, and the second exoergic circuit elements being located outside of the first triangular area and inside of the second triangular area.