Keyboard structure of electronic keyboard instrument
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United States of America Patent
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Mar 16, 2010
Grant Date -
Jan 24, 2008
app pub date -
Jul 13, 2007
filing date -
Jul 18, 2006
priority date (Note) -
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Abstract
A keyboard structure capable of suppressing a depth dimension of a keyboard instrument and rearward displacements of key main bodies to thereby prevent plastic deformation of hinges. White and black key main bodies are each disposed for pivotal motion around a common base end, serving as a key fulcrum, in a key depression/release direction via a hinge extended therefrom vertically downward. A rear stopper is provided in an intermediate portion of a key frame, and a contact portion of a stopper contact member is in light contact with a front surface of the rear stopper when a key main body is in a key depression initial position. In a key-nondepressed state, when a rearwardly force is applied to a key main body, the rear stopper applies the contact portion with a forwardly force against the rearwardly force, thus suppressing a rearward displacement of the key main body.
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