Loudspeaker, video device, and portable information processing apparatus
AssigneePanasonic Corporation
InventorsShuji SAIKI, Hiroyuki TAKEWA
Life of this patent
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Abstract
A loudspeaker includes a diaphragm that vibrates back and forth to emit a sound, a magnetic circuit that is provided on a rear side of the diaphragm and has a magnetic gap on a diaphragm side, and a voice coil that is directly or indirectly joined to the diaphragm and disposed within the magnetic gap. A magnetic fluid is loaded within the magnetic gap. Also, a plurality of first edge pieces are provided at different positions in an outer circumferential portion of the diaphragm for vibratably supporting the diaphragm, each of the first edge pieces having a non-linear cross-sectional shape.
Claims21
1-19. (canceled)
A loudspeaker comprising:
- a diaphragm;
- a magnetic circuit that is provided on a rear side of the diaphragm and has a magnetic gap;
- a voice coil that is directly or indirectly joined to the diaphragm along an outer shape of the diaphragm and extends into the magnetic gap;
- and
- a magnetic fluid that is disposed within the magnetic gap,
- wherein a curvature radius of the voice coil is 1 mm or larger.
Dependencies are inferred from the claim text.