Patent ID: 7076837

Claim:
A hinge device for pivotally coupling a display to a base of an electronic device, the hinge device comprising: a seat for being secured with the base, the seat defining a hole therein, and an inner wall of the seat defining a railway therein; a rotor comprising a shaft pivotally received in the hole of the seat, and a pair of beams; a pair of hinges, each of the hinges comprising a first rotating member for being attached to a respective one of the beams of the rotor, and a second rotating member pivotally engaged wit the first rotating member for being attached to the display; and at least one roller located on the rotor and movably received in the railway of the seat; wherein the railway defines at least two points thereon located in two different planes perpendicular to an axial direction of the shaft, and when the shaft of the rotor rotates in the hole of the seat, the at least one roller moves along the railway to cause the rotor to move in said axial direction of the shaft.