Patent No. 6,789,292
Issued: September 14, 2004
Inventors: Oshima; Kazuyoshi (Naruto-machi, JP); Imai; Katsuya (Tako-machi, JP)
Assignee:Sugatsune Kogyo Co., Ltd. (Tokyo, JP)
A hinge assembly for switching a closed position and an open position of two articles by engagement between a first hinge member which is disposed at one of the two articles such that the first hinge member is non-turnable and non-movable in the axial direction and a second hinge member which is disposed at the other article such that the second hinge member is non-turnable but movable in the axial direction, wherein the locking mechanism comprises a plurality of engagement members disposed between the first hinge member and the second hinge member in such a manner as to be away from each other in the circumferential direction, biasing means for pressing the engagement member against the first hinge member, a guide portion for connecting the engagement members, which are disposed at the first hinge member, such that the engagement members are movable only in the radial direction, and a locking portion, which is disposed at the second hinge member, being raised towards the first hinge member and varied in height along the radial direction, the engagement members being locked by a high part of said locking portion, thereby maintaining the first and second hinge members in the closed position, and wherein movement means moves the engagement members from a high side towards a low side of the locking portion in accordance with movement of the control member, which is externally controlled, from the first position towards the second position side, and the first hinge member is turned to the open position by turning force of the biasing means.
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