| 摘要 |
<p>PURPOSE:To facilitate the assembling work, to improve a playing feeling, and to maintain a pleasant ouch feeling by directly restricting the movement range of a mass body with a stopper means and also indirectly restricting the moving range of a key. CONSTITUTION:As the key 3 is lowered, the rotary shaft 8 of a hammer 9 is lowered, and as the rotary shaft 8 is lowered, the slide abutting piece 10 of the hammer 9 slides on a slide reception member 11 backward and the hammer 9 rotates anticlockwise around the rotary shaft 8, so that its free end part leaves a 1st stopper 13 and moves up toward a 2nd stopper 14. When the key reaches the lower end position of a keying stroke through the continuous depression of the key 3, the free end part of the hammer 9 abuts on the 2nd stopper 14 to stop its moving-up action. Consequently, the key 3 stops its moving-down action. Namely, this 2nd stopper 14 restricts the upper-limit position of the elevation of the hammer 9 and also restricts the lower-limit position of the keying stroke of the key 3.</p> |
