Patent ID: 7746651

Claim:
A heat sink assembly for dissipating heat generated by an electronic component mounted on a printed circuit board, the heat sink assembly comprising: a heat sink having a base and a plurality of fins extending from the base; and a clip mounted on the heat sink and adapted for securing the heat sink on the electronic component, the clip comprising: a pressing member and a pair of elongated arms formed on opposite ends of the pressing member, the pressing member having a lower portion protruding toward the base of the heat sink, a middle fin located on a center of the fins and extending through the pressing member in a manner such that the lower portion of the pressing member resiliently abuts against the heat sink, the two arms being located on opposite lateral sides of the heat sink and adapted for engaging with the printed circuit board so that the pressing member exerts a force on the heat sink toward the electronic component; wherein the pressing member comprises two parallel sheets connected with each other at two opposite top ends, and a through slot is defined between the two sheets, and the middle fin extends through the slot in a manner such that the two sheets are located at two flanks of the middle fin; wherein the arms comprise a pair of inversed U-shaped connecting portions connecting the two sheets at the two opposite top ends of the two sheets, and a pair of flat extension portions extending from free ends of each of the connecting portions; and wherein the flat extension portions of the arms are coplanar in their natural state, and the flat extension portions have an obtuse angle therebetween when the arms engage with clasps on the printed circuit board.