Speaker apparatus
AssigneesPioneer Corporation, Tohoku Pioneer Corporation
InventorsYasuhisa Abe, Hiroyuki Kobayashi
Life of this patent
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Abstract
A speaker apparatus includes at least one of an inner flux applicator and an outer flux applicator includes an annular first member and an annular second member. The first member having a first surface that faces toward the magnetic gap, the first member satisfying L1>W1 where L1 is a length of the first surface in a direction parallel to the central axis and W1 is a width of the first member in a direction orthogonal to a central axis. The second member is magnetically coupled with the first member and arranged on an outer side of the first member, the second member satisfying W2>L2 where W2 is a width of the second member in a direction orthogonal to a central axis and L2 is a length of the second surface in a direction parallel to the central axis, and L1>L2.
Claims20
A speaker apparatus comprising:
- a permanent magnet and a magnetic circuit, the magnetic circuit including an annular inner flux applicator and an annular outer flux applicator, the inner flux applicator and the outer flux applicator being arranged coaxially around a central axis and having a magnetic gap therebetween;
- a voice coil arranged in the magnetic gap around the central axis, the voice coil being supported such that the voice coil can vibrate when the inner flux applicator and the outer flux applicator produce magnetic flux in the magnetic gap;
- and
- a diaphragm coupled to the voice coil, the diaphragm being supported such that the diaphragm can vibrate when the voice coil vibrates,
- wherein at least one of the inner flux applicator and the outer flux applicator includes
- an annular first member having a first surface that faces toward the magnetic gap, the first member satisfying L1>W1 where L1 is a length of the first surface in a direction parallel to the central axis and W1 is a width of the first member in a direction orthogonal to a central axis;
- an annular second member that is magnetically coupled with the first member and arranged on an outer side of the first member, the second member satisfying W2>L2 where W2 is a width of the second member in a direction orthogonal to a central axis and L2 is a length of the second surface in a direction parallel to the central axis;
- and
- L1>L2.
Dependencies are inferred from the claim text.