KEY DEPRESSION AMOUNT SENSOR DEVICE

Abstract: a key depression amount sensor device () that is installed below keys of a piano, which keys are aligned along a longitudinal axis, and that detects a depression amount of each of the keys, the key depression amount sensor device including: an electronic circuit board () including a plurality of optical sensors that respectively detects the depression amounts of the keys by reflection of light; a housing () that extends along the longitudinal axis and houses the electronic circuit board; a clamp mechanism () that sandwiches an action beam (), which is positioned below the keys, in a longitudinal axis direction; and a connection mechanism () that connects the clamp mechanism and the housing.

Inventor(s): Yuki OGASAWARA, Hayato NISHIOKA, Shinichi FURUYA

CPC Classification: G01B11/14 (MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS)

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