Patent ID: 7539021

Claim:
A retention device, applied on an electronic device having a case and a circuit board, wherein the circuit board shifts relative to the case along a integrate direction or a release direction, such that the circuit board gets caught by the case or be detached from the case, and is fixed on the case through the retention device, comprising: a fastener, movably disposed on the case and having a stopping portion and a pushing portion, wherein a moving direction of the fastener forms an angle with the integrate direction or the release direction; at least one first elastic member, having one end disposed on the case and normally pushing the fastener, so as to maintain the fastener at a fixing position; and a latching member, disposed on one side of the circuit board facing to the fastener, the latching member shifting with the circuit board along the integrate direction, and pushing the fastener to remove, so as to be blocked by the stopping portion, or pushing the fastener to separate from the fixing position, such that the latching member is released from the stopping portion.