Patent ID: 6119310
Filing Date: 2000-09-19
Classification: H04M,Y10T

Abstract:
A hinge unit having a pair of hinges for linking a main body and a swing member at knuckle-shaped respective opposite ends of an edge of the swing member to make the swing member swingable relative to the main body around the edge, each of said hinges comprising a spring, and a cam shaft pinched by the spring and adapted to be fitted to one of the main body and the swing member so as to be rotatable about an axis parallel with said edge and axially displaceable from an original position, said cam shaft including a cam section, a tapered section extending between a small diameter end and a large diameter end and a projecting section arranged axially, sequentially and continuously, said spring being adapted to be fitted to the other one of the main body and the swing member, to resiliently pinch tip-holding areas of the cam section of the cam shaft at a selected angular position by means of a pair of resilient tips of the spring, said resilient tips being adapted to be slidingly moved toward the large diameter end of the tapered section by pushing the protruding section releasably engaged by a bearing section of one of the swing member and the main body, said cam shaft being adapted to restore said original position by the resilient force of said resilient tips of the spring.