| 摘要 |
<p>PURPOSE:To stably obtain a piano touch for a long period by providing a hammer which is supported rotatably below the front part of a key and a hammer reception part which abuts on part of the hammer slidably. CONSTITUTION:Hammers 36 and 40 are supported rotatably below the front parts of keys 3A and 3B and hammer reception parts 7 and 24 abut slidably on parts of the hammers 36 and 40. Therefore, when one key is pressed, its moving body slides along a slide surface against a frictional force while its center gravity moves in the lengthwise direction of the key. Further, a force varies with the difference between a force which operates vertically on the slide surface at the start point of the key depression and a force which operates vertically on the slide surface at the end of the key depression, and the reaction that the finger receive decreases gradually as the key is depressed. Consequently, the stable piano touch is obtained for a long period.</p> |
