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US 2009/0262971 A1Published application
Speaker
AssigneePanasonic Corporation
InventorOsamu Funahashi
Life of this patent
Estimating the term…
Abstract
An uncured fluid adhesive is charged into a groove surrounding the outer circumference of a voice coil so that the inner circumferential edge of a diaphragm is immersed in the adhesive. The cured adhesive securely bonds the diaphragm to the voice coil, and thus the diaphragm can be driven at high output.
Claims4
A speaker comprising:
- a frame;
- a magnetic circuit disposed in the frame;
- a voice coil disposed movably with respect to a magnetic gap in the magnetic circuit;
- a groove surrounding an outer circumference of the voice coil;
- a diaphragm having an inner circumferential edge disposed in the groove, and an outer circumferential edge coupled to the frame via a first edge;
- and
- a suspension holder connected to a backside of the diaphragm and having an outer circumferential edge coupled to the frame via a second edge,
- wherein the inner circumferential edge of the diaphragm is bonded to the voice coil by an adhesive charged in the groove.
5 more elements
Dependencies are inferred from the claim text.