FILAMENT COIL FOR BULB AND INCANDESCENT LAMP USING THE SAME AND MANUFACTURING METHOD FOR THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a filament coil for a bulb and an incandescent lamp using the same, and a manufacturing method for the same, which produces no deformations in the filament coil when manufacturing a light bulb, thereby obtaining a desired property in the luminous intensity distribution, and prevents a break of a wire in leg parts each due to a poor connection between a leg part each and a lead wire of the filament coil.;SOLUTION: The filament coil for a bulb includes a coil portion, legs which are formed by extending from both ends of the coil portion, and a metallic foil wrapped cylindrically around each of the legs to be connected, wherein an external surface of a cylindrical-shaped part of the metallic foil is crimped in a V-shaped slot.;COPYRIGHT: (C)2002,JPO