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US 5,027,412 AGranted
Voice coil with rectangular coil wire and foil leads
AssigneePioneer Electronic Corporation
InventorsJunkichi Hayashi, Tamotu Uchida
Life of this patent
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Abstract
A coil for a speaker in which a rectangular coil wire is formed by being cut from a sheet and then wound on the bobbin with its long direction disposed radially. Electrical connection is made to at least one end of the coil wire by ultrasonic welding to a conductive foil laid between the coil wire and the bobbin.
Claims6
A coil structure, comprising:
- a bobbin;
- a coil comprising an electrical wire wound on a winding region of said bobbin, and
- two conducting foils laid on said bobbin and extending in an axial direction thereof, at least one of said foils extending between said bobbin and coil substantially entirely through said winding region;
- wherein two terminal ends of said electrical wire are welded to respective ones of said two conductive foils.
1 more element
Dependencies are inferred from the claim text.