Electricity: circuit makers and breakers – Solid contact – Membrane type
Patent
1998-10-16
1999-11-09
Friedhofer, Michael
Electricity: circuit makers and breakers
Solid contact
Membrane type
H01H 1370
Patent
active
059818905
ABSTRACT:
A touch-to-action structure of a key signal comprises a lower thin film circuit board, an upper thin film circuit board and a spacer. Wires and a plurality of electric connections are formed on the upper surface of the lower thin film circuit board. The upper thin film circuit board are arranged above the lower thin film circuit board, Wires and a plurality of electric connections are formed on the lower surface of the upper thin film circuit board. The spacer is arranged between the upper and lower thin film circuit boards, the spacer being installed with a plurality of vent holes correspondent to the electric connections of the upper and lower thin film circuit boards. At least one vent hole is installed in each outer rim of the electric connections of the upper in film circuit board and the lower thin film circuit board for venting air. As the key is clicked continuously and rapidly, the air still can effectively vented and sucked so that the touch-to-action hat still can operate normally. Therefore, a suction effect is prevented.
REFERENCES:
patent: 3784768 (1974-01-01), Hunt
patent: 3995128 (1976-11-01), Hawkins
patent: 4485279 (1984-11-01), Nakamura
patent: 4916262 (1990-04-01), Jungels-Butler et al.
Chicony Electronics Co. Ltd.
Friedhofer Michael
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