Hinge assembly

Patent No. 6,904,644

Issued: June 14, 2005
Filed: September 21, 2001
PCT PUB.NO.:WO02/31369
Foreign Priority: Sep 29, 2000[JP]

Inventors:Oshima; Kazuyoshi (Naruto-machi, JP); Koshikawa; Shinichiro (Yokaichiba, JP); Imai; Katsuya (Tako-machi, JP)

Assignee:Sugatsune Kogyo Co., Ltd. (Tokyo, JP)

A hinge assembly (1) used for a foldable cellular telephone, wherein a pair of abutment members (5, 6) are forcibly rotated by the biasing force of a bias means (7) to a neutral position where the center parts of the projection (54) and the recess (64) of the abutment members are generally aligned with each other in circumferential direction, the projection is brought into contact with the recess at both side parts of the abutment members in circumferential direction when the pair of abutment members are rotated to the neutral position, and the outer surface of the projection and both side surfaces of the recess in circumferential direction should desirably be formed in an arcuate surface and an outwardly projecting arcuate surface, respectively.

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