SOUNDBOARD SPEAKER OF DIGITAL PIANO
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United States of America Patent
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Issued Date -
Mar 30, 2017
app pub date -
Aug 18, 2016
filing date -
Sep 29, 2015
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Abstract
To provide a soundboard speaker of a digital piano that displays more favorable acoustics by devising the arrangement of the vibration unit and ribs. In a soundboard speaker of a digital piano which transmits vibration generated by a vibration unit mounted at one face side of a diaphragm by ribs Ka to Kd mounted at the other face side of the diaphragm so that sound is produced from the whole of the diaphragm, the vibration unit disposed at a position to overlap the rib Kb when the soundboard speaker is viewed head on. The diaphragm in a horizontally long rectangular shape, and the ribs Ka to Kd consisting of prismatic members are disposed on the surface of the diaphragm parallel to each other and in an inclined manner with respect to the vertical direction.
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