Touch control apparatus for electronic keyboard instrument
AssigneeNippon Gakki Seizo Kabushiki Kaisha
InventorsTakao Yamauchi, Yasuhiko Asahi
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Abstract
A touch control apparatus for an electronic keyboard instrument, comprises a sensor having: an elongated insulating sheet having a set of conductive pattern films on a surface thereof, the elongated insulating sheet being folded and the set of conductive pattern films being formed to be spaced apart from each other; and a pressure-sensitive element sandwiched in a space defined by the folded elongated insulating sheet to be in contact with the conductive pattern films. The pressure sensitive element is deformed when a key of the instrument is depressed to deliver an electrical output through the conductive films representing the magnitude of the key depression. The apparatus is superior in easiness of handling the sensor and of assembling the apparatus.
Claims22
A touch control apparatus for an electronic keyboard instrument, comprising a sensor having:
- an elongated insulating sheet having at least one set of first and second conductive pattern films on a surface thereof, said elongated insulating sheet being folded and said set of first and second conductive pattern films being formed to be spaced apart from each other;
- a pressure-sensitive element sandwiched in a space defined by said folded elongated insulating sheet so as to be in contact with said conductive pattern films, said pressure-sensitive element being operated such that electrical characteristics thereof change according to a pressure applied thereto to generate an output, the output being extracted by said set of conductive pattern films;
- and means for regulating a position of said pressure-sensitive element sandwiched by said elongated insulating sheet with respect to said elongated insulating sheet, wherein said sensor is arranged at a position that the sensor is applied with a pressure in accordance with a depression of a key of the instrument.
A touch control apparatus for an electronic keyboard instrument, comprising:
- an elongated insulating sheet folded to have a certain length within a length of a keyboard;
- pressure-sensitive means sandwiched by said folded insulating sheet and corresponding to one or a plurality of keys;
- first and second conductive pattern films formed on an inner surface of said elongated insulating sheet to sandwich said pressure-sensitive means;
- and an adhesion portion for adhering two ends of said elongated insulating sheet, wherein electrical resistance of said pressure-sensitive means between said first and second conductive pattern films changes in accordance with a magnitude of a depression force when a key is depressed to press said pressure-sensitive means through said elongated insulating sheet.
Dependencies are inferred from the claim text.