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US 2008/0072747 A1Published application
Electronic keyboard instrument
AssigneeYamaha Corporation
InventorKenichi NISHIDA
Life of this patent
Estimating the term…
Abstract
An electronic keyboard instrument is assembled on a frame member. A keyboard has a plurality of keys pivotably supported by the frame member. A lower case is formed integrally with or separately from the frame member under the keyboard. An electroacoustic transducer is accommodated in a space between the keyboard and a bottom plate of the lower case, and outputs an acoustic wave. The acoustic wave outputted from the electroacoustic transducer is radiated outwardly through sound passages configured as gaps in the frame member and gaps between the plurality of the keys.
Claims25
An electronic keyboard instrument comprising:
- a frame member;
- a keyboard which has a plurality of keys pivotably supported by the frame member;
- a lower case which is formed integrally with or separately from the frame member under the keyboard;
- and
- an electroacoustic transducer which is accommodated in a space between the keyboard and a bottom plate of the lower case, and which outputs an acoustic wave,
- wherein the acoustic wave outputted from the electroacoustic transducer is radiated outwardly through sound passages configured as gaps in the frame member and gaps between the plurality of the keys.
3 more elements
An electronic keyboard instrument comprising:
- a frame member which has a plurality of mass supporting parts;
- a keyboard which has a plurality of keys pivotably supported by the frame member and a plurality of force transmission parts mounted to the respective keys;
- a plurality of mass bodies which are respectively disposed below corresponding ones of the keys and which are pivotably supported by corresponding ones of the mass supporting parts, so that the mass bodies pivot by the force transmission parts mounted to the corresponding keys;
- a lower case which is formed integrally with or separately from the frame member under the plurality of the mass bodies;
- and
- an electroacoustic transducer which is accommodated in a space between the mass bodies and a bottom plate of the lower case, and which outputs an acoustic wave,
- wherein the acoustic wave outputted from the electroacoustic transducer is radiated outwardly through sound passages configured as gaps between the plurality of the mass bodies and gaps in the frame member.
4 more elements
An electronic keyboard instrument comprising:
- a frame member;
- a keyboard which has a plurality of keys pivotably supported by the frame member;
- a lower case which is formed integrally with or separately from the frame member under the keyboard;
- and
- an electroacoustic transducer which outputs an acoustic wave, and which is accommodated in a space between the keyboard and the lower case such that a central axis of a front opening part of the electroacoustic transducer is inclined forward from a vertically down direction of the keyboard,
- wherein the lower case and/or the frame member are provided with one or more sound emitting holes on front lower portions thereof, so that the acoustic wave outputted from the electroacoustic transducer is radiated outwardly through sound passages configured as the sound emitting holes.
3 more elements
An electronic keyboard instrument comprising:
- a frame member which has a plurality of mass supporting parts;
- a keyboard which has a plurality of keys pivotably supported by the frame member and a plurality of force transmission parts mounted to the respective keys;
- a plurality of mass bodies which are respectively disposed below corresponding ones of the keys and which are pivotably supported by corresponding ones of the mass supporting parts, so that the mass bodies pivot by the force transmission parts mounted to the corresponding keys;
- a lower case which is formed integrally with or separately from the frame member under the plurality of the mass bodies;
- and
- an electroacoustic transducer which outputs an acoustic wave, and which is accommodated in a space between the mass bodies and the lower case such that a central axis of a front opening part of the electroacoustic transducer is inclined forward from a vertically down direction of the keyboard,
- wherein the lower case and/or the frame member are provided with one or more sound emitting holes on front lower portions thereof, so that the acoustic wave outputted from the electroacoustic transducer is radiated outwardly through sound passages configured as the sound emitting holes.
4 more elements
Dependencies are inferred from the claim text.