Patent ID: 7540575

Claim:
A computer case retention structure, comprising: a base having a bottom plate and a guided way disposed at an edge of the bottom plate, wherein a protruding hook is formed on the guide way and has an slid edge inclined with respect to the guided way, and a stopped edge vertical to the guided way; a cover having a top plate and at least one side plate, wherein the side plate is extended from one edge of the top plate corresponding to the edge of the bottom plate; a first and second elastic blades, wherein one end of the first and the second elastic blades is fixed to the inner surface of the side plate, and at least one protrusion is extended downward from a tip of the other end of the second elastic blade; when the cover is fixed onto the base, the protrusion slides against the guided way, and the protrusion slides along the slid edge of the protruding hook to slide over the protruding hook, and then is stopped by the stopped edge of the protruding hook to prevent the protrusion from moving towards the inverse direction, so that the cover is fixed onto the base without being moved relative to the base; and a release element disposed on the first elastic blade, which is pressed to bend the first elastic blade and the second elastic blade, and the cover can be removed from the base since the protrusion of the second elastic blade is not stopped by the stopped edge of the protruding hook.