Patent ID: 8902574

Claim:
A portable electronic device comprising: a case formed with an opening; a push-push mechanism including: a hollow column that is disposed in said case, and that has an inner surrounding surface, a plurality of angularly spaced-apart long grooves formed in said inner surrounding surface, and a plurality of short grooves formed in said inner surrounding surface, disposed alternately with said long grooves and shorter than said long grooves, a pushing component that has an outer end portion disposed in said case at a position adjacent to said opening, an inner end portion extending from said outer end portion into said hollow column, and a plurality of first engaging teeth disposed annularly on said inner end portion, a rotating component that is movably disposed in said hollow column and that includes a ring member, a plurality of positioning teeth protruding radially and outwardly from an external surface of said ring member, and a plurality of second engaging teeth disposed annularly on said ring member and abutting against said first engaging teeth, and a spring that is disposed in said hollow column and that biases said rotating component toward said pushing component; and an element that is connected to said outer end portion of said pushing component; wherein said pushing component is capable of moving relative to said hollow column between a received position, where said positioning teeth engage respectively with said short grooves and said element is located within said case, and an ejected position, where said positioning teeth are slidably and respectively received in said long grooves and said element is ejected out of said case through said opening.