| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a keyboard device which is not high at cost, and by which suitable sound output and key touch feeling of a grand piano is obtained, when a key is pressed. <P>SOLUTION: A key switch 5 including switches s1 and s2 of which distance between facing contact points is different each other, has only a structure in which switches s1 and s2 sequentially come into contact by a hammer 4 which rotates by pressing a key 3. A click rubber 14 has only a structure in which a top plate section 145 is elastically deformed to a concave shape by the hammer 4 which rotates by pressing the key 3 and reaction force increases, and a leg section 143 is elastically deformed to a folding shape and the reaction force decreases. If the reaction force by the click rubber 14 becomes a peak value, after the switch s1 is switched on, and the switch s2 is set to be on, after the reaction force decreases from the peak value, the suitable sound output and key touch feeling of the grand piano is obtained. <P>COPYRIGHT: (C)2008,JPO&INPIT |
