Patent ID: 7333333

Claim:
A heat dissipation device comprising: a heat sink having a bottom face for contacting with a heat generating device and a top face opposite to the bottom face; a retention module comprising a bottom receiving the heat sink thereon and a plurality of locking portions extending from the bottom; and a clip spanning on the heat sink, the clip comprising: a main piece comprising a pressing beam and a connecting portion and a clamping portion respectively depending downwardly from two ends of the pressing beam, the clamping portion engaging with a corresponding locking portion of the retention module, the connecting portion comprising a pivoting portion formed at an end thereof; an operating piece pivotally connecting with the pivoting portion of the connecting portion of the main piece; a buckling piece pivotally connecting with the operating piece, the buckling piece comprising a clamping portion for engaging with the retention module; wherein, by operating the operating piece, the heat dissipation device has two positions, at a first of which the clamping portion of the buckling piece of the clip engages with a corresponding locking portion the retention module, the pressing beam of the main piece of the clip presses the heat sink toward the retention module, at a second of which the clamping portion of the buckling piece of the clip disengages from the retention module; and wherein the connecting portion of the main piece of the clip has an engaging portion spaced from the pivoting portion thereof, and the operating piece of the clip comprises an engaging portion locking the engaging portion of the connecting portion of the main piece when the heat dissipation device is at the first position.