| 摘要 |
PURPOSE: To reduce the number of parts and to simplify assembling by forming a key body part, a board part fixing part and a connection part for connecting respective parts by resin integral molding. CONSTITUTION: The respective keys of the key body part 25 consisting of arraying plural white keys 21 and black keys 23 in parallel are connected on their longitudinal rear end parts, united by synthetic resin and molded like a panel. Namely the longitudinal front end part of the key body part 25 is a key depression part 27 to be depressed by a player and a locking part 31 projected downward is formed on the rear end side of the body part 25. On the other hand, the board part fixing part 33 is formed on the back of the locking part 31 and connected to the locking part 31 through a thin connection part 35. Since the key body part 25, the board part fixing part 33 and the connection part 35 are integrally molded by resin, the number of parts can be reduced and the device can simply be assembled by one operation. |
