Input device for alarming excessive striking force

Details Input device for alarming excessive striking force Input device for alarming excessive striking force

2006-08-08

2006-08-08

Hjerpe, Richard (Department: 2674)

Computer graphics processing and selective visual display system

Display peripheral interface input device

Cursor mark position control device

C345S169000, C345S172000

Reexamination Certificate

active

07088337

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.

REFERENCES:
patent: 5579238 (1996-11-01), Krugman
patent: 5745376 (1998-04-01), Barker et al.
patent: 5902257 (1999-05-01), Korth
patent: 6369803 (2002-04-01), Brisebois et al.
patent: 6400285 (2002-06-01), Gifford
patent: 6498312 (2002-12-01), Villain
patent: 2001/0013463 (2001-08-01), Asai et al.

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