Metal dome sheet in mobile communication terminal and keypad...

Details Metal dome sheet in mobile communication terminal and keypad... Metal dome sheet in mobile communication terminal and keypad...

2005-06-21

2005-06-21

Friedhofer, Michael A. (Department: 2832)

Electricity: circuit makers and breakers

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Double snap

C200S516000, C200S314000

Reexamination Certificate

active

06909063

ABSTRACT:
A keypad of a mobile communication terminal includes a contact sheet having contacts preferably shaped as hemispherical domes which deflect to turn on/off switch contact point pairs on a printed circuit board. The contact sheet further includes band parts covering the domes and an insulating sheet having at least one pair of semicircular openings for exposing portions of the domes. The insulating sheet is preferably made of a light-reflecting material/color which disperses light to illuminate keys of the keypad.

REFERENCES:
patent: 5924555 (1999-07-01), Sadamori et al.
patent: 6373008 (2002-04-01), Saito et al.
patent: 6548779 (2003-04-01), Takahashi et al.
patent: 6593537 (2003-07-01), Teruyama et al.
patent: 6604278 (2003-08-01), Sera et al.

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