Locks – Operating mechanism – Using a powered device
Patent
1988-10-27
1990-05-08
Wolfe, Robert L.
Locks
Operating mechanism
Using a powered device
70395, 70408, E05B 4700
Patent
active
049227360
ABSTRACT:
A key device including a key main body for actuating a mechanical lock device, a knob fixedly secured to the base end of the key main body, and an electronic circuit incorporated in the knob of the key device, wherein: the electronic circuit is carried by a flexible printed circuit board which is folded around an edge of the base end of the key main body and at least partly cover the two major surfaces of the base end. Thus, even when the size of the base end of the key main body is increased so as to improve the resistance of the knob against the force which tends to pry open the knob due to the twisting torque acting upon the key main body during use, through such efficient utilization of the internal space of the knob, the circuity can be fitted into the knob without increasing its size. Furthermore, the base end of the key main body serves as a heat sink and a firm support for the circuit and the accessory component parts.
REFERENCES:
patent: 4322719 (1982-03-01), Moorhouse
patent: 4562712 (1986-01-01), Wolter
patent: 4642734 (1987-02-01), Anderson
patent: 4663952 (1987-05-01), Gelhard
patent: 4726205 (1988-02-01), Allerdist
patent: 4734693 (1988-03-01), Dpuhosch
patent: 4789859 (1988-12-01), Clarkson
Arima Takanori
Mori Ryuji
Tanaka Akira
Honda Giken Kogyo Kabushiki Kaisha
Oki Electric Co., Ltd.
Wolfe Robert L.
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