Loudspeaker magnetic circuit and loudspeaker equipped with same
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United States of America Patent
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Oct 16, 2018
Grant Date -
Aug 10, 2017
app pub date -
Apr 25, 2017
filing date -
Aug 24, 2015
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A magnetic circuit includes: a magnet including a first and a second surface; a top plate disposed on the first surface; a bottom plate coupled magnetically with the second surface; and a yoke coupled magnetically with the bottom plate and disposed so as to protrude from the bottom plate along a first direction. The second surface is parallel to the first surface. The first and the second surfaces are magnetized. The yoke includes a magnetic pole face that opposes the top plate. In a portion where the magnetic pole face is formed, of the yoke, a magnetic saturation part is disposed to generate magnetic saturation. The magnetic saturation part has a shape in which an area of a cross section perpendicular to the first direction decreases with nearness to a tip of the yoke along the first direction.
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