WATERPROOF COIL AND METHOD OF FORMING WATERPROOFING INSULATING LAYER

摘要

PROBLEM TO BE SOLVED: To provide a waterproof coil using a waterproofing insulating layer that has a fixed thin thickness and can be manufactured inexpensively. SOLUTION: This waterproof coil 1 is constituted by coating the whole surface of a coil 2 with the waterproofing insulating layer composed of a thin urethane resin film 3 having a softening temperature lower than the heat- resisting temperature of the insulating coating film of the coil 2 and higher than an ordinary temperature and a waterproofing property. Then the lead-out wire 5 of this coil 1 is led out through a lead-out wire holder 4 fixed to the thin urethane resin film 3. Since the waterproof coil 1 is thus constituted, the external form of the coil 1 becomes compact.