Patent ID: 8773857

Claim:
A heat sink mounting device, comprising: a touching plate defining a locking hole; and a mounting member comprising: a locking post comprising a body, a limiting portion located on the body, and two protrusions protruding from the body; and a spring surrounding the body; wherein an inner surface of the locking hole defines two cutouts; the touching plate comprises two blocking blocks, and each of the two blocking blocks being extended from an edge of the locking hole on a bottom surface of the touching plate; a first end of the spring abuts the limiting portion, and a second end of the spring abuts a top surface of the touching plate; the bottom surface of the touching plate is opposite to the top surface of the touching plate; the first end of the spring is opposite to the second end of the spring; each of the two protrusions extends out of each of the two cutouts and abuts the bottom surface of the touching plate; and one of the two protrusions is located between the two blocking blocks thereby preventing the body from rotating in the locking hole.