Patent ID: 7565984
Filing Date: 2009-07-28
Classification: H02G,H05K

Abstract:
1. A screw cap for a portable electronic device, comprising: a main body comprising a head and a cylindrical body having an outer cylindrical surface, the head being located at a top of the main body, the cylindrical body adjoining a bottom of the head, a diameter of the outer cylindrical surface being less than a diameter of the head, the outer cylindrical surface defining a first circumferential groove and a second circumferential groove, the first groove being at a top of the cylindrical body and being deeper than the second groove; and an elastic ring; wherein the elastic ring is engagable in, and moveable from, the first groove and the second groove, an outer diameter of the elastic ring is less than the diameter of the head when the elastic ring is engaged in the first groove, and an outer diameter of the elastic ring is greater than the largest diameter of the head when the elastic ring is engaged in the second groove.