Pantograph type keyboard switch

Details Pantograph type keyboard switch Pantograph type keyboard switch

1996-08-13

1998-06-02

Luebke, Renee S.

Electricity: circuit makers and breakers

Electric switch details

Actuators

H01H 1320

Patent

active

057587639

ABSTRACT:
In a pantograph type keyboard switch, a leaf spring projects from a linkage member and slidably engages the underside of a keytop and the resulting reaction force is used to remove play between the keytop and the linkage member. Further, a frictional slope is formed in slide grooves in the underside of the keytop so that frictional force increases as the keytop approaches a top dead point.

REFERENCES:
patent: 4433225 (1984-02-01), Cowles
patent: 5382762 (1995-01-01), Mochizuki
patent: 5512719 (1996-04-01), Okada et al.
patent: 5555971 (1996-09-01), Takada
patent: 5630501 (1997-05-01), Tsay

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