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US 12,010,499 B2Granted
Micro speaker with symmetrical voice coil and magnetic circuit
AssigneeHarman International Industries, Incorporated
InventorsZhenjin Zhu, Yuanzhen Niu, Jihui Zeng, Hong Wen
Life of this patent
Estimating the term…
Abstract
An ultra slim micro-speaker is provided with a middle gasket between the voice coil and the diaphragm is provided. A distance between a top of a top plate and a top of the voice coil can be equal to a distance between a bottom of the top plate and a bottom of the voice coil, and a winding height has a symmetrical relationship in the magnetic circuit with a BL(x) curve of the magnetic circuit having improved symmetry.
Claims18
A speaker, comprising:
- a diaphragm;
- a magnetic circuit structure including a magnet gap;
- a voice coil suspended in the magnet gap, and
- a middle gasket sandwiched between the diaphragm and the voice coil and being connected to the diaphragm and the voice coil,
- wherein a distance between a top of the voice coil and a top of a top plate is equal a distance between a bottom of the voice coil and a bottom of the top plate in a vertical direction.
2 more elements
A speaker, comprising:
- a diaphragm;
- a magnetic circuit structure including a magnet gap;
- a voice coil suspended in the magnet gap and moving with the diaphragm to produce an audible sound, and
- a middle gasket sandwiched between the diaphragm and the voice coil and being connected to the diaphragm and the voice coil,
- wherein a distance between a top of the voice coil and a top of a top plate is equal a distance between a bottom of the voice coil and a bottom of the top plate in a vertical direction.
2 more elements
A speaker, comprising:
- a diaphragm;
- a magnetic circuit structure including a magnet gap and concentrating magnetic flux into the magnetic gap;
- a voice coil suspended in the magnet gap and moving with the diaphragm to produce an audible sound, and
- a middle gasket sandwiched between the diaphragm and the voice coil and being connected to the diaphragm and the voice coil,
- wherein a distance between a top of the voice coil and a top of a top plate is equal a distance between a bottom of the voice coil and a bottom of the top plate in a vertical direction.
2 more elements
Dependencies are inferred from the claim text.