| 摘要 |
PROBLEM TO BE SOLVED: To provide a keyboard device of an electronic keyboard musical instrument which can easily obtain effect close to a let-off with simple and compact constitution in proper timing to sounding by key depression. SOLUTION: This device has a keyboard 3, a hammer 4 which rotates as a key of the keyboard 3 is pressed, a key switch 15 which detects key depression information on the keyboard 3, and an attracting part 29 composed of a magnet or magnetic body and is equipped with a holder 26 which is provided nearby an actuator part 4e and a rotatable jack 27 which is provided nearby the holder 26 and has an attracted part 31 made of a magnet or magnetic body attracted by the attracting part 29; and the jack 27 is held by the holder 26 by the attraction of the attracting part 29 to the attracted part 31 when the key is released and the actuator part 4e of the hammer 4 having rotated engages in a specific rotational stroke when the key of the keyboard 3 is pressed to part the attracted part 31 from the attracting part 29 of the holder 26, thereby giving the let-off effect. |
