Keyswitch assembly with a key support limiting transverse, longi

Details Keyswitch assembly with a key support limiting transverse, longi Keyswitch assembly with a key support limiting transverse, longi

1992-10-28

1994-01-18

Luebke, Renee S.

Electricity: circuit makers and breakers

Electric switch details

Actuators

200517, H01H 312

Patent

active

052801470

ABSTRACT:
The present invention provides a keyswitch assembly enabling a keyboard employing the same to be formed in a small thickness without sacrificing the stroke of the key to the reduction of thickness of the keyboard, facilitating keystroke operation and securing reliable keystroke. The keyswitch assembly has a key supported on a base plate by a support mechanism formed by pivotally connecting first and second support levers each provided with pivots at their opposite ends in a scissors-like form by a pivotal joint. The support levers are connected to the key and the base plate by fitting the pivots thereof in round holes and horizontally elongate grooves formed in the key and in round holes and horizontally elongate grooves formed in the base plate. When the key is depressed, the first and second support levers turn on the pivots fitted pivotally in the round holes and the pivotal joint compresses a rubber spring disposed under the support mechanism for switching.

REFERENCES:
patent: 3174685 (1965-03-01), Swanson
patent: 3857007 (1974-12-01), Leuenberger
patent: 4433225 (1984-02-01), Cowles
patent: 4560844 (1985-12-01), Takamura et al.
patent: 4560845 (1985-12-01), Takamura et al.
patent: 4580022 (1986-04-01), Oelsch et al.
patent: 4735520 (1988-04-01), Suzuki et al.
patent: 4902862 (1990-02-01), Oelsch et al.

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