| 摘要 |
<p>PROBLEM TO BE SOLVED: To shorten the horizontalizing time of piano key, reduce the abrasion of piano components, and improve the precision of the horizontalizing process of the piano key. SOLUTION: This device is equipped with a balance rail 12 which partitions a balance surface 15 and a piano key assembly which is supported on the balance surface 15 and partitions a play surface 22. The balance surface 15 is arranged on a 1st plane 26 and the play surface 22 is arranged at a vertical distance from a 2nd plane 26. A horizontal keeping arm has a 1st end 20 and a 2nd cantilever free end and a horizontal keeping adjustment member includes a segments which extends between a long shape body 18 and the 2nd free end. This segment has its length adjusted so that the vertical distance between the 1st plane 26 and 2nd plane 28 varied.</p> |
