| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve the appearance when a key lid is opened and to decrease the number of parts so as to reduce a cost by providing the key lid with a lid stopper which is mounted at either of a lid rear part and a front case and stops the key lid at a close position by attaining the lid rear part at the front case. SOLUTION: The key lid 1 is opened and closed around a turning pin 4 and stops at the close position as the front surface of the lid rear part 3 is detained by the lid stopper 10 at the time of closing. A clearance is maintained between the pendent part 2b and lower keyslip 7 of the key lid 1 at the time of closing, by which the contact with the cheekblock 6 and lower keyslip 7 of the key lid 1 and the generation of the collision sound occurring herein and the damage of the lower keyslip 7, etc., are prevented. In such a case, the lid stopper 10 is mounted at the rear surface of the front case 8 and is invisible at all from a player and, therefore, the appearance is made better than the appearance of the conventional structure in which a rubber button 51 is mounted at the cheeckblock 6 and the lower keyslip 7.</p> |
