Shielded switch

Details Shielded switch Shielded switch

1994-11-10

1996-04-30

Picard, Leo P.

Electricity: electrical systems and devices

Housing or mounting assemblies with diverse electrical...

For electronic systems and devices

361796, 361814, 174 35R, 200305, H05K 900

Patent

active

055130780

ABSTRACT:
An EMI shielded keypad (10) or switch for a radiotelephone (50) has a non-conductive cover (12) attached to a printed circuit board (PCB) (14). The PCB (14) has a ground pad (20) and a plurality of metal traces (26) on a first surface (16) that attaches to the cover (12). The cover (12) is made of a flexible, preferably clear material, such as mylar and has a dimple (28) centered over the ground pad (20). A bubble (30) is centered over the plurality of conductive traces (26). A conductive coating (32) is selectively applied to the mating surface (34) of the cover (12), so that the conductive coating (32) in the bubble (30) is electrically isolated. By pressing on the bubble (30) electrically contact is established between the plurality of traces (26), thus the bubble and the traces (26) define a switch.

REFERENCES:
patent: 4555600 (1985-11-01), Morse
patent: 5124889 (1992-06-01), Humbert et al.
patent: 5241695 (1993-08-01), Roshitsh et al.
patent: 5438482 (1995-08-01), Nakamura et al.

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