Keyboard apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Feb 11, 2014
Grant Date -
Aug 8, 2013
app pub date -
Feb 6, 2013
filing date -
Feb 6, 2012
priority date (Note) -
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Abstract
A keyboard apparatus wherein a hammer body having movable and stationary engagement portions is configured such that, in its pivotal movement in a forward direction, a click feeling in a key depression touch is generated when the movable engagement portion comes into contact with and gets over the stationary engagement portion, wherein a distance from a hammer pivot shaft to the movable engagement portion at a certain key stroke position in a key depression stroke becomes smaller with an increase in a pressing drive force, and wherein the movable engagement portion comes into contact with the stationary engagement portion in the pivotal movement in the forward direction where a magnitude of the pressing drive force is less than a prescribed value, and the movable engagement portion does not come into contact with the same where the magnitude of the force is equal to or larger than the prescribed value.
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