Patent ID: 8069908
Filing Date: 2011-12-06
Classification: H01L

Abstract:
1. A heat dissipation device adapted for dissipating heat from a heat-generating electronic element, the heat dissipation device comprising: a heat sink comprising a base and a plurality of fins extending upwardly from the base, at least an engaging notch being defined in a top of the fins, the base having two first fixing ears and two second fixing ears respectively located adjacent to four corners of the base, the two first fixing ears located adjacent to a front side of the base, the two second fixing ears located adjacent to a rear side of the base, each of the two first fixing ears and the two second fixing ears defining a retaining hole therein for receiving a fixture; a fan holder coupled to the front side of the base, the fan holder comprising a top panel and two sidewalls extending downwardly from two lateral edges of the top panel, the top panel having at least an inserting protrusion extending downwardly from a bottom surface thereof, the two sidewalls having two fixing flanges extending laterally from lower ends thereof corresponding to the two first fixing ears of the base, each of the fixing flanges defining an extending hole therein corresponding to the retaining hole of a respective first fixing ear, and each of the second fixing ears having a thickness substantially equal to a sum of the thicknesses of one of the fixing flanges and the respective first fixing ear, the sidewalls being perpendicular to the top panel, the fan holder further comprising a bottom board connecting to front portions of the lower ends of the sidewalls, the bottom board being parallel to the top panel and having an air-guiding plate extending downwardly from a front side thereof, the air-guiding plate therein defining a plurality of through holes located beneath the base of the heat sink; and a fan secured at a front side of the fan holder; wherein the top panel is partially placed on a front portion of the top ends of the fins and the at least an inserting protrusion is inserted into the at least an engaging notch of the fins, the two sidewalls abut against front portions of two lateral sides of the heat sink and the two fixing flanges are respectively disposed on the two first fixing ears of the base of the heat sink, and the retaining hole of each first fixing ear and the extending hole of the corresponding fixing flange communicate with each other for receiving the fixture therein to fix the fan holder on the heat sink and at the same time to fix the base of the heat sink on the heat generating electronic element.