Key switch structure for a thin-gage electronic device

Details Key switch structure for a thin-gage electronic device Key switch structure for a thin-gage electronic device

1988-06-13

1989-07-11

Scott, J. R.

Electricity: circuit makers and breakers

Multiple circuit control

Multiple switch

200512, H01H 1370, H01H 110, G06F 302

Patent

active

048474525

ABSTRACT:
A key switch structure is provided which improves the reliability of the elasticity of the switch. A front film has a metal front panel adhered to its underside. A switch panel pattern is formed in the front panel and includes an operational member or contact unitary with the front panel, connected thereto by spring portions formed of connection members and leg members, connected to supports of the metal front panel. The contact has a carbon film on its underside, and is separated from a fixed contact by a spacer film. The spring portions eliminate the problem of deformation by creep of the front film and thus improve the reliability of the key switch.

REFERENCES:
patent: 4220815 (1980-09-01), Gibson et al.
patent: 4303960 (1981-12-01), Sherwood et al.
patent: 4336529 (1982-06-01), Buan
patent: 4472609 (1984-09-01), Lamm et al.
patent: 4529959 (1985-07-01), Ito et al.
patent: 4620075 (1986-10-01), LaBelle et al.
patent: 4628408 (1986-12-01), Kimura

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