Patent ID: 7334297

Claim:
A hinge assembly for a foldable electronic device, comprising: a shaft; a housing defining a guiding groove therein; at least one torsional spring having a first end and a second end opposite to the first end, the first end of the torsional spring being coupled to the shaft, and the second end of the torsional spring being coupled to the housing; and a pin having a first end and an opposite second end, the first end of the pin being fixed to the shaft and the pin being unmovable relative to the shaft, and the second end of the pin being slidable along the guiding groove of the housing; wherein, the shaft is rotatable relative to the housing between a first position where the second end of the pin is located in a first position of the guiding groove and a second position where the second end of the pin is located in a second position of the guiding groove.