| 摘要 |
<P>PROBLEM TO BE SOLVED: To make lightly and smoothly shiftable a keyboard and an action assembly. <P>SOLUTION: In the piano shifting device in which a frame to which the keyboard 1 and the action device body are fitted is slidably set on a keybed 3, permanent magnets 23, 24 are respectively embedded in the keybed 3 and a back rail 6 of the frame so that both poles are faced each other on the same surface as the opposite surfaces of both the members 3, 6. <P>COPYRIGHT: (C)2004,JPO |
