| 摘要 |
PURPOSE: A large output sound-vibration converter is provided to increase vibration energy by moving an electromagnet using a steel core and an inertia weight. CONSTITUTION: Each electromagnet(13,13') are fabricated by winding coils(17,17') around center projection portions(13a,13a') of E-shaped steel cores having three projection portions(13a,13b,13c,13a'13b'13c'). if an amplification circuit outputs sound signals to the coils(17,17') of the electromagnet(13,13'). Polarities and intensity of magnetic force of the electromagnet(13,13') are varied according to amplitudes and phases of the sound signals and the electromagnet(13,13') go and return thereby. The electromagnet(13,13') have opposite polarities, respectively since the electromagnet(13,13') is symmetrically moved on the basis of a center vertical line. The electromagnet(13,13') include inertia weights(23,23'), respectively. The electromagnet(13,13') are vibrated by permanent magnets(11,11') and a housing(12). A plurality of electromagnet neutrality elastic bodies(25a,25b,25a',25b') are formed by compressing springs.
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