Key mechanism for portable electronic device

Details Key mechanism for portable electronic device Key mechanism for portable electronic device

2008-12-03

2011-11-22

Enad, Elvin G (Department: 2832)

Electricity: circuit makers and breakers

Solid contact

Push button operated

C200S512000

Reexamination Certificate

active

08063329

ABSTRACT:
A key mechanism (22) includes a key body (222), a resilient metal sheet (226), a circuit board (26). The circuit board (26) is placed between the key body (222) and the resilient metal sheet (226). The circuit board (26) includes a first surface (2622) facing the key body (222) and a second surface (2624) facing the resilient metal sheet (226). The first surface (2622) has a number of ground points connecting to the key body (222). The second surface (2624) has a switch unit corresponding to the resilient metal sheet (226).

REFERENCES:
patent: 4771139 (1988-09-01), DeSmet
patent: 7019225 (2006-03-01), Matsumoto et al.
patent: 2006/0042924 (2006-03-01), Ito
patent: 4-115733 (1992-10-01), None

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