| 摘要 |
<p>PURPOSE:To decrease the number of components of the key structure, to facilitate the assembling operation, and to reduce the cost. CONSTITUTION:A weight 33 is molded of synthetic resin in two colors in the front-end side internal space of a key body 31 which is made of synthetic resin and displaced by rotation as key pressing operation is performed. Therefore, when the key 30 is pressed and displaced downward by rotation, the weight 33 made of the synthetic resin places an action load on the key 30, so a key touch which is similar to the key touch feeling of an acoustic piano can be obtained. Further, the key body 31 and weight 33 can be united, and consequently the number of components can be decreased; and the need to fit the weight 33 after the key body 31 is molded is eliminated, so the assembling operation is easy and the cost is reducible.</p> |
