| 摘要 |
A keyboard musical instrument utilizes a magnetic action to strike a resonator element with a hammer in response to playing of a pivotally mounted key, the magnetic action including a pair of opposite polarity magnetic poles mounted on an actuating end of the key and a magnetic pole mounted on the hammer to be disposed in horizontal alignment with one of the poles mounted on the key of an opposite polarity when the hammer is in a rest position such that the opposite polarity magnetic poles attract one another with the hammer in the rest position and, when the playing end of the key is depressed, the similar polarity pole on the actuating end of the key is moved to repel the magnetic pole carried on the hammer to impel the hammer to strike the resonator element. A block of non-magnetic material can extend from the lower magnetic pole on th actuating end of the key under the magnetic pole of the hammer to engage the same and initiate movement of the hammer when the playing end of the key is depressed.
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