| 摘要 |
PROBLEM TO BE SOLVED: To reduce the weight of a voice coil when reducing the size and weight of a speaker while reliability is assured. SOLUTION: A voice coil 12 is connected to a tinsel wire 14 through a lead wire 13. A cone 15 functions as a vibration plate. The lead 13 on the cone 15 holds a spiral shape and thereby has elasticity. Then, if the cone 15 vibrates, the lead wire 13 functions as a dumper, so a break in wire can be prevented effectively. COPYRIGHT: (C)2004,JPO
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