Patent ID: 7530144
Filing Date: 2009-05-12
Classification: G06F,Y10T

Abstract:
1. In a rotatable hinge including a fixed frame adapted for engagement with a laptop computer base and a rotation portion rotatable relative to the fixed frame and adapted for engagement with a laptop computer screen, the fixed frame including a circular wall and a connection base integrally formed with the circular wall and configured in such a way that the connection base is engageable with the laptop computer base, the rotation portion having a sleeve, two securing devices respectively provided to two different ends of the sleeve and an extension extending from a bottom of the sleeve to be received in a through hole defined in the circular wall so that the rotation portion is rotatable relative to the fixed frame, wherein the improvements comprise: the extension having a flange formed thereon and a sectorial block formed on an outer periphery of the flange, the circular wall having a limiting boss formed on a peripheral edge thereof to be selectively connected to the sectorial block so as to limit the rotational movement of the rotation portion relative to the fixed frame, the circular wall having protrusions formed on the peripheral edge thereof, the extension having a stationary washer and the stationary washer having holes defined to correspond to the protrusions of the circular wall such that the protrusions are received and riveted in the holes to secure engagement between the stationary washer and the circular wall.