Patent ID: 7746643

Claim:
A heat sink assembly comprising: a heat sink for absorbing heat from an electronic component mounted on a circuit board, the heat sink having a first shoulder and a second shoulder at two lateral sides thereof; and a locking device comprising: a retention module having a first sidewall and a second sidewall opposite to the first sidewall, a pair of opposite receiving portions being formed on the first sidewall and the second sidewall of the retention module for receiving the corresponding first shoulder and second shoulder of the heat sink, a vertical hole and a horizontal hole located on each of one of the receiving portions; first wire clip having two extension portions at two ends thereof and non-rotatably engaged with the vertical and horizontal holes, and a pressing portion between the two extension portions and pressing the first shoulder of the heat sink; a second clip comprising a pressing portion located on the second shoulder of the heat sink, an axle connecting with the pressing portion and pivotably engaging with the second sidewall of the retention module and a locking portion connecting with the pressing portion; wherein the second clip can rotate around the axle thereof, and the locking portion of the second clip engages with the retention module and the pressing portion of the second clip presses the second shoulder of the heat sink toward the retention module when the heat sink assembly is in a locked position; wherein the retention module comprises two supporting racks extending upwardly from an end of each sidewall; and wherein supporting racks each extend a supporting platform for cooperatively supporting another electronic device thereon.