Operation detection switch, musical instrument and parameter...

Details Operation detection switch, musical instrument and parameter... Operation detection switch, musical instrument and parameter...

2005-02-01

2005-02-01

Donels, Jeffrey W (Department: 2837)

Music

Instruments

Electrical musical tone generation

Reexamination Certificate

active

06849796

ABSTRACT:
An operation detection switch capable of reproducing the manner of performance in which the speed of depressing an operating portion changes in the middle of a key action and of achieving a reduced manufacturing cost. The operation detection switch includes a switch main body and legs. A fulcrum projection, a first extending portion, protrusion and a second extending portion are provided in sequence along one end to the other end of and extending from the switch main body. Furthermore, a pressure projection is provided on the other end of the switch main body. Movable contacts corresponding to fixed contacts formed on a printed circuit board are formed at the tips of the first and the second extending portions. The operation detection switch and the printed circuit board constitute a detection device for detecting the depressing action of the key.

REFERENCES:
patent: 4668843 (1987-05-01), Watanabe et al.
patent: 4901614 (1990-02-01), Kumano et al.
patent: 5062342 (1991-11-01), Nagatsuma
patent: 5453571 (1995-09-01), Adachi et al.
patent: 5952629 (1999-09-01), Yoshinaga et al.
patent: 6075213 (2000-06-01), Ichiro
patent: 6147290 (2000-11-01), Uno
patent: 6765142 (2004-07-01), Sakurada et al.

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