Patent ID: 8089759

Claim:
A fastener for mounting an electronic device in a computer, comprising: a cap defining a receiving groove therein; a sleeve connected to the cap, the sleeve defining a receiving aperture and a passage hole therein; a mounting post comprising a torsion portion and a wedge portion at two opposite ends thereof, the wedge portion comprising an angled surface formed thereon, a blocking ring provided between the torsion portion and the wedge portion, a diameter of the blocking ring exceeding that of the passage hole of the sleeve; and a spring disposed around the torsion portion of the mounting post and located between the cap and the blocking ring, wherein the spring and the blocking ring of the mounting post are received in the receiving aperture of the sleeve, the torsion portion of the mounting post extends into the receiving groove of the cap, and the wedge portion extends out of the sleeve from the passage hole; wherein when the cap is rotated, the torsion portion rotates commensurately to adjust an orientation of the angled surface of the wedge portion; and wherein when a force acts on the angled surface of the wedge portion of the mounting post, the wedge portion of the mounting post slides into the receiving aperture of the sleeve, and when the force ceases, the wedge portion of the mounting portion is ejected out of the sleeve through the passage hole under an elastic force of the spring.