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US 6,141,427 AGranted
Bone-conduction speaker
AssigneeTemco Japan Co., Ltd.
InventorMikio Fukuda
Life of this patent
Estimating the term…
Abstract
A yoke 1 having a center magnetic pole 2 around which a voice coil is wound is provided, the yoke 1 is extended in four directions, magnets 4 are disposed on two parts 7 and 7 facing to each other among the extensions, respectively, and diaphragm fixing sections 6 are erected on the other two parts 8 and 8 and a diaphragm is fixed on the diaphragm fixing section 6.
Claims8
A bone-conduction speaker consisting of:
- a yoke having a magnetic pole at a center thereof;
- a voice coil wound around said magnetic pole;
- the yoke extending in a plane in four directions beyond a perimeter of said coil and forming a first pair of opposing seats and a second pair of opposing seats;
- at least pair of magnets respectively fixed to said first pair of opposing seats;
- a pair of diaphragm fixing sections respectively formed as a unit with said second pair of opposing seats;
- and
- a diaphragm fixed directly to said pair of diaphragm fixing sections so as to be spaced apart from said yoke, said voice coil and said pair of magnets.
4 more elements
Dependencies are inferred from the claim text.