| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain clean sounding with rich sound volume by making vibration conduction to a resonance part excellent. <P>SOLUTION: A "driven system" is constituted by fixing each lower end part BRa of a rod type sound body BR to the top surface 12a of a sound body fixation part 12 of a base plate BPT and making each upper end part BRb free, and a resonance body fixed part 11 is fixed to a center fixation part 1a of a resonance box 1 with a screw. A plunger 21 is inserted and fixed to the lower parts of leaf springs 22 and 23 and further a mass member 32 is fixed to the plunger 21 to reciprocally move in a solenoid coil 24. When driving pulses are sent to an actuator ACTA according to playing data, a "driving system" constituted by fixing the mass member 32 to the plunger 21 moves as a single body, and the plunger 21 abuts against the sound body BR, which vibrates to generate a sound. Since the driven system and driving system are equal in mechanical impedance, sounding is carried out with a rich sound volume. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
