Keyboard musical instrument equipped with electromagnetic key touch generator for imparting piano key-touch to player
First Claim
1. A keyboard musical instrument comprising:
- a plurality of keys turnable along trajectories between respective rest positions and respective end positions;
a plurality of key sensors respectively monitoring said plurality of keys, and respectively producing key status signals each representative of current key status of associated one of said plurality of key sensors;
a plurality of first resilient members respectively associated with said plurality of keys so as to urge the associated keys toward said rest positions;
a plurality of second resilient members respectively associated with said plurality of keys so as to urge the associated keys toward said end positions, a first resilient force of each of said plurality of second resilient members being balanced with a second resilient force of associated one of said plurality of first resilient members at the rest position of associated one of said plurality of keys;
a plurality of key actuators generating forces exerted on said plurality of keys, respectively, so as to build up resistances to key motions from said rest positions toward said end positions; and
a controller connected to said plurality of actuators, and responsive to said key status signals so as to change each resistance depending upon said current key status of associated one of said plurality of keys on the trajectory.
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Accused Products
Abstract
A keyboard musical instrument includes an electromagnetic key touch generator for imparting a piano-like key touch to black/white keys, and the electromagnetic key touch generator has leaf spring members respectively held in contact with the upper surface of the black/white keys for urging the black/white keys toward the end positions and coil springs urging plungers of solenoid-operated key actuators to urge the black/white keys toward the rest positions; the resilient force of each leaf spring member is balanced with the resilient force of the associated coil spring at the rest position of the associated black/white key, and the solenoid-operated key actuator is expected to partially cancel the resilient force of the coil spring so as to build up resistance to the black/white key depressed by a player.
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Citations
10 Claims
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1. A keyboard musical instrument comprising:
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a plurality of keys turnable along trajectories between respective rest positions and respective end positions; a plurality of key sensors respectively monitoring said plurality of keys, and respectively producing key status signals each representative of current key status of associated one of said plurality of key sensors; a plurality of first resilient members respectively associated with said plurality of keys so as to urge the associated keys toward said rest positions; a plurality of second resilient members respectively associated with said plurality of keys so as to urge the associated keys toward said end positions, a first resilient force of each of said plurality of second resilient members being balanced with a second resilient force of associated one of said plurality of first resilient members at the rest position of associated one of said plurality of keys; a plurality of key actuators generating forces exerted on said plurality of keys, respectively, so as to build up resistances to key motions from said rest positions toward said end positions; and a controller connected to said plurality of actuators, and responsive to said key status signals so as to change each resistance depending upon said current key status of associated one of said plurality of keys on the trajectory. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification