Patent ID: 7440288

Claim:
A casing, suitable to carry at least a detachable expansion card having a connecting plate, wherein the casing comprises: a main frame, having a first surface suitable to partially lean against the connecting plate, a second surface substantially parallel to the first surface and a third surface connecting the first surface and the second surface; a first limit element, pivoted at the main frame, wherein the first limit element is suitable to swing about a first axis between a first location and a second location; and at least a second limit element, pivoted at the main frame, disposed on the second surface and adjacent to the first limit element, wherein the second limit element is suitable to swing about a second axis between a third location and a fourth location, and when the detachable expansion card is disposed in the casing, the first limit element is located at the second location and the second limit element is located at the fourth location, the second limit element locks the first limit element and the first limit element locks the connecting plate and partially covers the third surface so as to fix the detachable expansion card in the casing.