| 摘要 |
PROBLEM TO BE SOLVED: To provide a voice coil bobbin 1 for a speaker, which can prevent fire flame propagation of a reinforcement paper sheet 3 wound on the voice coil bobbin 1, a diaphragm and a damper when an excess current is supplied to a voice coil 2. SOLUTION: A perforated line 1a is formed in a circumferential direction to the voice coil bobbin 1 so as to separate a part of the voice coil bobbin 1 on which the voice coil 2 is wound from a part 3 of the voice coil bobbin 1 on which the damper and the diaphragm are fixed.
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