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US 9,854,365 B2Granted
Loudspeaker motor and suspension system
AssigneeHarman International Industries, Incorporated
InventorBrian Sterling
Life of this patent
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Abstract
A loudspeaker includes a voice coil in a balanced state. In the loudspeaker, at least a first suspension element acts on a first side of the voice coil, and at least a second suspension element acts on a second side of the voice coil. The loudspeaker includes a symmetric magnet assembly. The voice coil aligns with the symmetric magnet assembly. The symmetric alignment contributes to the loudspeaker yielding substantially symmetric motor force (BL), suspension stiffness (K), and inductance (Le).
Claims24
A loudspeaker comprising:
- a magnet assembly aligned along a longitudinal axis;
- a frame encircled around the magnet assembly, wherein the magnet assembly and the frame form a voice coil gap therebetween;
- a voice coil disposed in the voice coil gap and mounted for translation along the longitudinal axis, wherein the voice coil includes a first side longitudinally spaced from a second side;
- a voice coil former attached to the voice coil;
- a diaphragm attached to the voice coil former and adjacent to the first side of the voice coil;
- a first suspension element attached to the diaphragm and the frame for supporting the first side of the voice coil during translation;
- and
- a second suspension element attached to the voice coil former, adjacent to the second side of the voice coil, and attached to the frame for supporting the second side of the voice coil during translation;
- wherein the voice coil is symmetrically aligned with the magnet assembly such that the magnet assembly includes an overall length along the longitudinal axis and the voice coil includes an overall length along the longitudinal axis, wherein a halfway point of the overall length of the magnet assembly coincides with a halfway point of the overall length of the voice coil when the voice coil is at rest.
6 more elements
A loudspeaker comprising:
- a magnet assembly aligned along a longitudinal axis;
- a frame encircled around the magnet assembly, wherein the frame includes an outer wall, wherein the magnet assembly and the outer wall form a voice coil gap;
- a voice coil disposed in the voice coil gap, wherein the voice coil includes a first side longitudinally spaced from a second side, and wherein the voice coil is aligned with the magnet assembly to yield at least two of:
- a substantially symmetric motor force,
- a substantially symmetric suspension stiffness,
- a substantially symmetric inductance;
- and
- a first suspension element attached to the frame and adapted to apply a first stiffness to the first side of the voice coil, and a second suspension element attached to the frame and adapted to apply a second stiffness to the second side of the voice coil.
5 more elements
A loudspeaker comprising:
- a magnet assembly aligned along a longitudinal axis;
- a frame encircled around the magnet assembly, wherein the magnet assembly and the frame form a voice coil gap;
- a voice coil disposed in the voice coil gap, wherein the voice coil includes a first side longitudinally spaced from a second side;
- a first suspension region including a first suspension element attached to the frame and the first side of the voice coil;
- and
- a second suspension region including a second suspension element attached to the frame and the second side of the voice coil;
- wherein the voice coil is symmetrically aligned with the magnet assembly such that the magnet assembly includes an overall length along the longitudinal axis and the voice coil includes an overall length along the longitudinal axis, wherein a halfway point of the overall length of the magnet assembly coincides with a halfway point of the overall length of the voice coil when the voice coil is at rest.
4 more elements
Dependencies are inferred from the claim text.