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US 8,009,856 B2Granted
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.
Claims2
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, said voice coil including a coil winding;
- an adhesive receiver member including
- an adhesive receiver surrounding an outer circumference of the voice coil such that an adhesive-receiving groove is formed about the voice coil, and
- an extending portion extending downwardly along the voice coil from a bottom of the adhesive receiver to be in contact with the coil winding of the voice coil so as to position the adhesive receiver with respect to 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;
- a suspension holder connected to a backside of the diaphragm and having an outer circumferential edge coupled to the frame via a second edge;
- and
- an adhesive charged in the groove;
- wherein the inner circumferential edge of the diaphragm is bonded to the voice coil by the adhesive.
8 more elements
Dependencies are inferred from the claim text.