Patent ID: 7295431

Claim:
A portable disk device comprising: a protective housing having a containing room communicating with an outside space; a portable disk having a movable pivot means, which is used for pivotally disposing the portable disk inside the containing room so as to make the portable disk able to be positioned at a retraction position or a first position; a torsion means having two ends respectively interacting with the portable disk and the movable pivot means so as to store a potential energy as a location of the portable disk is changed; and a lock means having a movable component disposed inside the movable pivot means, the lock means further having a first interaction portion and a second interaction portion respectively defined on the protective housing and the portable disk, the movable component being capable of longitudinally moving between the first position and a second position, wherein the movable component simultaneously interacts with the first interaction portion and the second interaction portion to make the portable disk unable to have a movement relative to the protective housing as the movable component is positioned at the first position via an external force, and the movable component is released from interacting with the first interaction portion and the second interaction portion so as to make the portable disk able to have a movement relative to the protective housing as the movable component is positioned at the second position via another external force.