Patent ID: 8480187

Claim:
A door opener for opening a door of an electronic device, the door opener comprising: a main bracket comprising a lower plate, a first sidewall, a second sidewall, a guide rail, and a resisting portion, the lower plate having two opposite edges, the first sidewall and the second sidewall extending from the opposite edges of the lower plate respectively, the first sidewall and the second sidewall defining a pair of shaft holes therethrough, the guide rail and the resisting portion being located on a surface of the first sidewall and facing away the second sidewall, the guide rail having a guiding direction which is substantially parallel to the lower plate, the shaft holes being aligned with each other and extending substantially perpendicular to the guiding direction, the first sidewall defining a through hole on the guide rail, the resisting portion defining an opening thereon; a locking element comprising a sliding bar, a spacing block, and a guide pole, the sliding bar being capable of sliding along the guiding direction, the spacing block extending from the sliding bar and passing through the through hole, the spacing block being substantially perpendicular to the guiding direction, the guide pole extending from one end of the sliding bar along the guiding direction and being received in the opening; a compression spring sleeved on the guide pole and compressed between the sliding bar and the resisting portion; a rotation plate located between the first sidewall and the second sidewall and comprising a pair of shafts and a fixing block, the shafts extending from two side surfaces of the rotation plate and received in the shaft holes, the fixing block extending from one side of the rotation plate and configured for latching with the spacing block; and a torsion spring sleeved on one of the shafts and resisted between the rotation plate and the lower plate, the rotation plate being capable of selectively rotating to one of a first position in which the door is opened, the torsion spring relaxes and the fixing block separates from the spacing block, and a second position in which the door is closed, the torsion spring is at a twisted state and the fixing block latches with the spacing block.