Patent ID: 7283361

Claim:
A heat dissipation device comprising: a heat sink comprising a base for contacting a heat generating device, the base defining two flutes in two opposite sides thereof respectively; a retention module for being located around the heat generating device, the retention module comprising a bottom wall supporting the heat sink; and two clipping portions, each of which is rotatablely connected to the retention module, for securing the heat sink to the retention module, each of the two clipping portions comprising a pressing portion which is rotatablely received in the flute of the base of heat sink and presses the base to the bottom wall of the retention module when the each clipping portion is fastened to the retention module; wherein the flute is arc-shaped with two lateral ends being higher than a center of the flute, the pressing portion moves from the center to one of the lateral ends when the each clipping portion is rotated to be fastened to the retention module.