| 摘要 |
PROBLEM TO BE SOLVED: To provide a reliable and small speaker with even a small diameter vibration cone capable of accommodating to a wide reproduction frequency band and enduring large volume input. SOLUTION: The speaker 1 comprises a magnetic circuit 5, a vibration cone 2, a damper 3 and a voice coil 4. The periphery edge of the damper 3 is fixed to an internal periphery plane of a voice coil bobbin 10 forming the voice coil 4. The center of the damper 3 is fixed on the center of the magnetic circuit 5. A through-hole 33 is arranged at the core of the damper 3. The damper 3 is fixed on the magnetic circuit 5 by using the through-hole 33. COPYRIGHT: (C)2006,JPO&NCIPI
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