| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an action mechanism of a piano, which can adjust a static load while being kept tobe compact. SOLUTION: An action unit has a magnet 22c installed at the tail 22b of a support 22 and is so constituted so that when a key is not pressed, the magnet 22c comes closest to a magnet 60a and repulses it, so when the key is pressed, weight placed on a non-operation end 10a can be lightened to make a touch feeling (static load) light. And this action unit uses the magnets 22c and 60a, so a space which is large enough to make those magnets 22c and 60c repulse each other is only secured to adjust the static load on the key 10 while the action mechanism 1 is kept compact.</p> |
