Push-button switch having capacitive and mechanical functionality
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United States of America Patent
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Apr 4, 2017
Grant Date -
Aug 9, 2012
app pub date -
Jul 2, 2010
filing date -
Jul 10, 2009
priority date (Note) -
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Abstract
A pushbutton switch has a pressure switching function to recognize a key actuation and a capacitive sensor function to recognize a key touch. It has an at least partly electrically conductive key (12) and a printed circuit board (16) which includes at least one electrical contact (18) that is activated by depressing the key (12) via a switching mat (22) arranged between the key (12) and the printed circuit board (16). The printed circuit board (16) also has at least one capacitive sensor surface (20) located opposite to and at a distance from the key (12), with a capacitive coupling existing between the key (12) and the sensor surface (20).
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