| 摘要 |
PROBLEM TO BE SOLVED: To provide a speaker device which is reduced in size in the depth direction to reduce thickness and reproduces high frequency bands so that wide-band sounds can be reproduced. SOLUTION: The speaker device 10 has a diaphragm 40, a voice coil 60 provided so as to be joined with a center hole 41 in the diaphragm 40, a magnetic circuit 70 arranged so as to face to the voice coil 60, and a piezoelectric element 82. In addition, the speaker device 10 also has a piezoelectric vibrator 80 which is fixed to a part where vibration can be transmitted to the vibration board 40 and vibrates the diaphragm 40 using deformation generated at the piezoelectric element 82 when input signal is applied. COPYRIGHT: (C)2008,JPO&INPIT
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