Patent ID: 7013537

Claim:
A detent means for a heat sink used to press connect a heat sink with a microprocessor located at the center of a fixing seat, said detent means comprises: a pressing member, a lower area of said pressing member presses against said heat sink; a fixing engaging member fixed on one end of said pressing member, and extending down to a side of said fixing seat to make engagement with a plurality of protrusions on said side of said fixing seat; a movable engaging member connected at an opposite end opposite to said end of said pressing member for engaging with a plurality of protrusions on an opposite side opposite to said side of said fixing seat; and a foldable member used to make connection of said movable engaging member with said pressing member, said foldable member is provided on its lower area at least with a pivot portion, and a first pivot axle is extended between said pivot portion and said pressing member, a second pivot axle is extended between a top end of said movable engaging member and said pivot portion of said foldable member, said second pivot axle is kept a fixed distance from said first pivot axle, so that said movable engaging member swings taking said second pivot axle as an axis, and said movable engaging member is lowered or raised to a predetermined level under an action of said foldable member.