Input device for alarming excessive striking force
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United States of America Patent
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-
Aug 8, 2006
Grant Date -
May 20, 2004
app pub date -
May 22, 2003
filing date -
Nov 15, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An input device for alarming excessive striking force adopted for use on electronic instruments alerts users when the button keys are being depressed with excessive force, and preventing hand injury. The invention includes a button key structure, a first conductor membrane, a spacing membrane, a second conductor membrane and an alarm. When the button key structure is subject to an excessive external force, the button key structure connects electronically to a first conductor to output signals, and the first conductor also runs through an opening to connect electronically to a second conductor to output signals to the alarm to alert the presence of the excessive force.
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