Patent ID: 7647674
Filing Date: 2010-01-19
Classification: H04M,Y10T

Abstract:
1. A hinge assembly, comprising: a shaft defining an outer screw thread; a cam having a cam surface, the cam defining a cam hole having an inner circumferential wall, the inner circumferential wall defining an inner screw thread, the outer screw thread of the shaft meshed with the inner screw thread of the cam; a follower having a latching cam surface; a first spring providing an elastic force causing the cam surface of the cam and the latching cam surface of the follower to resist each other; a control member having at least one receiving groove; a second spring positioned between the control member and the follower; a fixing seat placed around the control member, the fixing seat having an outside circumferential wall and a bottom portion, the bottom portion including at least one block in the circumferential wall and at least one slot adjacent to the at least one block; the at least one block being received in the at least one receiving groove of the control member so as to lock the control member into the fixing seat; and a locking module having a locking ring and an anti-friction element, the locking ring being fixed on one end of the shaft, and the anti-friction element positioned on the shaft by the locking ring.