Patent ID: 8051537

Claim:
A hinge assembly, comprising: a rotatable shaft, wherein a flange is formed on a proximal end of the rotatable shaft, and a positioning groove is defined in a distal end of the rotatable shaft; a rotatable stand non-rotatably connected to the rotatable shaft; a fixed stand rotatable connected to the rotatable shaft, wherein the fixed stand comprises a first frame, a second frame, and a rivet; the first frame being fixed to the second frame via the rivet; a cam sleeved on the rotatable shaft; a cam follower sleeved on the rotatable shaft, and engaging with the cam; an elastic member connected to the rotatable shaft; and a retaining ring engaging in the positioning groove of the rotatable shaft, thus producing an elastic force along the rotatable shaft, wherein the rotatable stand, the fixed stand, the cam, the cam follower, and the elastic member are positioned between the flange and the positioning groove.