| 摘要 |
PROBLEM TO BE SOLVED: To provide a magnetic shield of a heating coil for induction heating, which is cheap and has small thermal or over-aging. SOLUTION: In a heating coil holding part 11, an approximately flat belt-like shield 19 is formed in one body in a perpendicular direction keeping a fixed distance from the perimeter edge of the heating coil 15, and the magnetic field generated from the disk-like heating coil 15 is reduced. Further, the rigidity of the heating coil holding part 11 itself is increased and heats build-up of the heating coil 15 and distortion by using over the long period of time, are prevented. |
