Patent ID: 7486974

Claim:
A hinged device, comprising: a first frame comprising a first cam, and the first cam having a first contact surface and a first hole, the first contact surface substantially enclosing the first hole, the first contact surface having two first peaks and two first feet; a second frame rotatably connected to the first frame, and the second frame having a receiving slot; a second cam movably disposed within the receiving slot, the second cam comprising a second contact surface and a second hole, the second contact surface substantially enclosing the second hole, the second contact surface having two second peaks and two second feet; an elastic member disposed between the second frame and the second cam, providing a first elastic force on the second cam along a first direction; and an electrical transmission media extending from the first to the second hole; wherein part of the second cam extended into the receiving slot, and the contact between the first cam and the second cam only occurs between the first contact surface and the second contact surface; wherein, when the first frame rotates relative to the second frames, the first peaks and the first feet move relative to the second peaks and the second feet, so that the second cam moves along the first direction.