Long travel elastomer keyboard

Details Long travel elastomer keyboard Long travel elastomer keyboard

1980-02-04

1982-10-12

Scott, James R.

Electricity: circuit makers and breakers

Multiple circuit control

Multiple switch

200159B, 200292, H01H 1370

Patent

active

043540686

ABSTRACT:
A flexible data entry keyboard is disclosed which is formed using a flexible substrate having conducting stripes and switch points thereon. The flexible substrate may be folded back on itself such that the switch points are facing one another in opposed complementary relation. An insulating substrate is positioned between the substrates and has a plurality of apertures in alignment with said switch points. To provide a long travel and high tactile feedback characteristic, an elastometer substrate is positioned over the top of said flexible substrate and has domes thereon which overlay each of said switch points. The domes have actuation surfaces on their underneath side such that when a force is applied to the dome, the dome is compressed and deformed against the switch points and the actuation surface ensures that a reliable and consistent contact is made. When the force is removed, the dome snaps back to its original shape, thereby providing high tactile feedback and assurance to the user that contact has been made.

REFERENCES:
patent: 3860771 (1975-01-01), Lynn et al.
patent: 3911234 (1975-10-01), Kotaka
patent: 4066851 (1978-01-01), White et al.
patent: 4156802 (1979-05-01), Gilano et al.
patent: 4180711 (1979-12-01), Hirata et al.
patent: 4245138 (1981-01-01), Harper

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