Patent ID: 7405380

Claim:
The portable electromagnetic induction heating device for carrying an induction current in a conductor, making said conductor generate heat by Joule's heat, and heating adhesive by the heat generating conductor, the device comprising: a power-supply unit for supplying electric power; a heating head provided with a high-frequency generation circuit for converting a current supplied from said power-supply unit to a high-frequency current; and a heating induction coil to which a current from the high frequency generation circuit is supplied and which generates an induction current in said conductor, wherein said heating induction coil has a facing surface wherein an efficiency of generating an eddy current is improved by winding said coil body around a magnetic core with a tip surface facing said conductor and by forming a magnetic circuit concentrating a facing magnetic force line and converging a magnetic force line in a space opposite to the conductor wherein a region of the generated eddy current is adjusted by connecting windings of a plurality of said magnetic cores at respective rear ends thereof and by changing a polarity and a position of a magnetic force line formed by said heating induction coil including a flat surface or curved surface facing said conductor, and is formed by a coil body with a shape of one or more circles, ovals, or polygons to be capable of surface-heating a complex three-dimensional curved surface.