Patent ID: 7572979

Claim:
A waterproof structure of an electric wire connecting part in which insulating covers of electric wires are peeled; and exposed cores are connected to each other by welding, soldering or with a pressure terminal to form a connecting part; a foamed sheet impregnated with a low viscosity silicone in a central portion thereof except a peripheral side thereof is wrapped around said connecting part; and said silicone which has oozed from said foamed sheet is filled in clearances between said connected cores to form a silicone-filled portion and excess silicone is absorbed by said foamed sheet to waterproof said electric wire connecting part without oozing said extra silicone outside, wherein: an adhesive tape having an area larger than said foamed sheet is wrapped around a peripheral surface of said foamed sheet, said foamed sheet is overlapped on said adhesive tape at a central portion thereof in an axial direction of said connecting part of said cores, with said foamed sheet disposed at one-edge side with respect to a center in a direction in which said foamed sheet is wrapped around said connecting part of said cores, said adhesive tape and said foamed sheet overlapped on said adhesive tape are folded in such a manner as to surround said connecting part of said cores therewith, both ends of said foamed sheet are overlapped on each other, and an overlapped side is further folded, wound around a peripheral surface of said adhesive tape, and adhered to said adhesive surface thereof.