Electrodynamic loudspeaker
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United States of America Patent
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-
Mar 9, 2010
Grant Date -
Oct 5, 2006
app pub date -
Dec 6, 2005
filing date -
Mar 30, 2005
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An electrodynamic loudspeaker 1 includes a magnetic circuit 10 and a vibrator 20. The magnetic circuit 10 includes a magnet 11 and poles 12 and 13 adhering to the magnet 11. The vibrator 20 includes a coil bobbin 21 and voice coils 22 and 23 wound around and fixed to a portion of the coil bobbin 21 facing the poles 12 and 13. A magnetic member 30 is fixed to the coil bobbin 21 of the vibrator 20 at a position spaced apart from the voice coils 22 and 23. The magnetic member 30 is fixed at a position on the coil bobbin 21 so as to extend over an area facing the magnet 11 of the magnetic circuit 10.
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