Keyboard apparatus
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United States of America Patent
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Feb 26, 2013
Grant Date -
Mar 24, 2011
app pub date -
Jun 25, 2010
filing date -
Jun 25, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
A keyboard apparatus includes a key supported for pivoting movement about a pivot point, a mass member for imparting a reaction force to performance operation of the key in interlocked relation to the key, a transmission member provided in abutment with both of the key and mass member to transmit a load from one of the key and mass member to the other, and an electromagnetic actuator for driving, via a fixed coil, the transmission member toward at least one of the key or mass member. Good key touch feeling can be achieved not only by a load applied from the mass member to the key but also through load control by the actuator. Thus, it is possible to faithfully reproduce a key touch feeling approximate to that in a natural keyboard instrument, such as an acoustic piano, with a simple construction and facilitated control.
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