Patent ID: 7406343

Claim:
A hinge adapted for rotationally coupling a cover and a body of a mobile phone about two perpendicular axes comprising: a crankshaft having a transverse shaft and a vertical shaft extending perpendicularly from an end of the transverse shaft, the transverse shaft having a first keyed surface, the vertical shaft having a second keyed surface; a first cam assembly disposed on the transverse shaft, the first cam assembly together with the transverse shaft being adapted to be assembled with said cover, the first cam assembly comprising: a first cannular cam disposed on the transverse shaft, the first cannular cam having a third keyed surface on an outer wall thereof so as to be keyed to said cover; a first cannular cam follower having a fourth keyed surface on an inner wall thereof, the first cannular cam follower being disposed on and keyed to the transverse shaft with the fourth keyed surface engaging with the first keyed surface; and a first resilient means disposed on the transverse shaft for resiliently biasing the first cannular cam and the first cannular cam follower into engagement; and a second cam assembly disposed on the vertical shaft, the second cam assembly together with the vertical shaft being adapted to be assembled with said body, the second cam assembly comprising: a second cannular cam disposed on the vertical shaft and fixed to said body; a second cannular cam follower having a fifth keyed surface on an inner wall thereof, the second cannular cam follower being disposed on and keyed to the vertical shaft with the fifth keyed surface engaging with the second keyed surface; and a second resilient means disposed on the vertical shaft for resiliently biasing the second cannular cam and the second cannular cam follower into engagement.