Key for a keyboard

Details Key for a keyboard Key for a keyboard

1999-09-20

2001-09-04

Bradley, Paula (Department: 2832)

Electricity: circuit makers and breakers

Electric switch details

Actuators

C200S345000

Reexamination Certificate

active

06284992

ABSTRACT:

Key of this type are used, for example, on the keyboards of notebook computers. In this case, the return part is made of an elastically deformable material and has a pot shape. A contact point is provided in the centre and, when the key is pressed, this contact point makes contact with a conductor pathway on a printed circuit board upon which the base part is arranged. The wall of the return part is deformed in an S-shape when the key is pressed. The bottom part of the key head is guided in a recess in the base part. This guide must ensure that the key head can be pressed without tilting, since otherwise there is no guarantee that the key will make contact. Due to this guide, the bottom part of the key head is relatively long and the recess in the base part is relatively deep.
The purpose of the present invention is to make a flat key which guarantees that the key head can be pressed without tilting.


REFERENCES:
patent: 4251703 (1981-02-01), Hoeft et al.
patent: 5120923 (1992-06-01), Kato et al.
patent: 5203448 (1993-04-01), Osada et al.
patent: 5306886 (1994-04-01), Yamada
patent: 5386091 (1995-01-01), Clancy
patent: 5626223 (1997-05-01), Lee
patent: 0499449 (1992-08-01), None
patent: 0777246 (1997-06-01), None

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