Patent ID: 7426116

Claim:
A retention device, applied to 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, so as to get caught by the case or be detached from the case, and the circuit board is fixed on the case through the retention device, comprising: a first fastener, movably disposed on the case and moving between a fixing position and a releasing position, wherein a stopping portion and at least one first pushing portion are disposed at one side of the first fastener, and a moving direction of the first fastener forms an angle with the integrate direction or the release direction; a first elastic member, disposed on the case, leaning against one side of the first fastener, and normally maintaining the first fastener at the fixing position; a latching member, disposed on one side of the circuit board facing to the first fastener, the latching member shifting with the circuit board along the integrate direction, and pushing the first fastener to shift, and stopped by the stopping portion to position the circuit board on the case; and a second fastener, movably disposed on the case, and having a moving direction offset to the moving direction of the first fastener, wherein at least one second pushing portion contacting with the first pushing portion is disposed at one side of the second fastener, and a contacting surface of the first pushing portion and the second pushing portion forms an angle with the moving direction of the first fastener, such that the second pushing portion pushes the first pushing portion to make the first fastener shift from the fixing position to the releasing position.