| 摘要 |
PROBLEM TO BE SOLVED: To provide a magnetic gap structure and a dynamic speaker for supplying a stable driving force even when a diaphragm reaches the top point of vibration amplitude, and being manufactured in a thinner unit. SOLUTION: The magnetic gap structure includes a plurality of protrusions and a diaphragm 10. The plurality of protrusions constitute magnetic gaps for voice coils 12 arranged at each of a top plate 9 and a yoke 8. The top plate and the yoke constitute a magnetic circuit. A hole for penetrating the plurality of protrusions is formed at the diaphragm. COPYRIGHT: (C)2009,JPO&INPIT
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