| 摘要 |
An action mechanism (1) of jumping-up type located inside a keyboard musical instrument, wherein a beak-shaped projected piece (19) is provided projectedly at the base end part of a hammer body (9), an engaged step part (31) is formed on an escapement member (11) energized normally toward the beak-shaped projected piece (19) of the hammer body (9), the pivotally attached part of the hammer body (9) is rotated in the hammering direction and the beak-shaped projected piece (19) is engaged with the engaged step part (31) when a keyboard operation is performed so that the hammer body (9) performs a hammering rotating operation against a sound source body (7); a push-out member (21) making the beak-shaped projected piece (19) to be escaped from the engaged step part (31) by pushing the escapement member (11) to a side opposite to the hammer body (9) when the hammering rotating operation of the hammer body (9) is performed is provided on at least one of the base end part of the hammer body (9) and the escapement member (11), a suppressing member (33) which stops the hammer body (9) by separating it from the sound source body (7) is formed integrally with the escapement member (11) under the condition that the beak-shaped projected piece (19) is escaped from the engaged step part (31), and the suppressing member may be provided to a fixed part without forming it integrally with the escapement member (11).
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