Pantograph type keyboard switch

Details Pantograph type keyboard switch Pantograph type keyboard switch

1997-06-09

1998-09-01

Luebke, Renee S.

Electricity: circuit makers and breakers

Electric switch details

Actuators

200345, H01H 312

Patent

active

057997721

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 each slide groove in the underside of the keytop so that frictional force increases as the keytop approaches the top dead point position.

REFERENCES:
patent: 1970793 (1934-08-01), Amis
patent: 5382762 (1995-01-01), Mochizuki
patent: 5387261 (1995-02-01), Yamada et al.
patent: 5555971 (1996-09-01), Takada

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