Keyboard musical instrument and solenoid drive mechanism
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United States of America Patent
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-
Mar 20, 2012
Grant Date -
Sep 16, 2010
app pub date -
Mar 5, 2010
filing date -
Mar 13, 2009
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A keyboard musical instrument has a solenoid including a plunger and a coil into which the plunger is inserted, a drive unit for applying voltage to the solenoid, and a key which moves together with the plunger, and on which a force generated by the solenoid is exerted. The drive unit includes a position detector for detecting position of the key in the direction in which the key is depressed or released. By varying voltage which is to be applied to the solenoid in accordance with the position of the key detected by the position detector while the key is in motion, the drive unit varies the force which is to be generated by the solenoid.
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Family
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