Patent ID: 8365811

Claim:
A heat sink fan comprising a heat sink and a fan, the heat sink including: a base having a center axis; and a plurality of fins extending radially outwardly from an outer circumferential surface of the base, the plurality of fins being disposed in a circumferential direction; and the fan including: an impeller portion disposed adjacent to the heat sink in a direction extending along the center axis, the impeller portion rotating about the center axis; and a frame portion, including at least one protruding portion, the frame portion arranged to cover and fix the impeller portion, a portion of the frame portion being opposed to the heat sink; wherein the at least one protruding portion is arranged in a space between the plurality of fins which are adjacent to each other; and the at least one protruding portion is arranged on a parallel face of a pawl portion protruding radially inwardly from the frame portion, the parallel face of the pawl portion is arranged to contact end faces of less than all of the plurality of fins.