Patent ID: 7627930

Claim:
A hinge assembly, comprising: a button having at least one pushing portion; a fixing seat having at least one block, the button movably positioned to the fixing seat, each pushing portion extending through the fixing seat; a control member having at least one receiving groove, the at least one block being received in the at least one receiving groove, the at least one pushing portion resisting the control member, the fixing seat releasably engaging with the control member; a first spring providing an elastic force to the control member; a follower having a cam surface, the control member engaged with the follower; a cam having a latching cam surface, the cam including a cam hole having an inner circumferential wall, the inner circumferential wall defining an inner screw thread; a second spring providing an elastic force to make the cam surface of the follower and the latching cam surface of the cam resist each other; and a shaft having an end shaft, the end shaft defining an outer screw thread, the outer screw thread engaging with the inner screw thread of the cam.