Hammer device and keyboard device for electronic keyboard instrument
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United States of America Patent
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Apr 14, 2015
Grant Date -
Jun 20, 2013
app pub date -
Nov 29, 2012
filing date -
Dec 16, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
A hammer device of an electronic piano with keys which swing in accordance with key depression, includes a hammer support that is made of a synthetic resin and has a fulcrum shaft, and a hammer having a shaft hole part for being fitted on the fulcrum shaft and configured to pivotally move about the fulcrum shaft in a manner interlocked with the swinging key. The fulcrum shaft has an outer peripheral surface formed by a pair of arcuately-curved surface portions opposite to each other and a pair of planar surface portions each extending between the pair of arcuately-curved surface portions and parallel to each other.
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