Loudspeaker and electronic apparatus using the same
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United States of America Patent
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Apr 17, 2012
Grant Date -
Jul 15, 2010
app pub date -
Sep 28, 2007
filing date -
Sep 29, 2006
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
In a loudspeaker, three magnets are disposed to provide magnetic gaps therebetween and a voice coil is fit therein. The magnets disposed at both sides are magnetized so that their opposing poles exhibit the same magnetic polarity. The magnet in the middle has its magnetic poles in the direction perpendicular to the line connecting the poles of the side magnets. The side magnets are fixed to a plate made of non-magnetic material. Those magnetic poles of the side magnets and the middle magnet not facing the magnetic gaps are magnetically coupled by a magnetic member.
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