| 摘要 |
PROBLEM TO BE SOLVED: To provide an IH system fixing device capable of maintaining the heat generating efficiency of a heat roller at a high level while supporting the heat roller by a small-diameter and high-strength bearing. SOLUTION: A cap 4 composed of a magnetic ring cap 4a for covering the inner peripheral side near each end of a bobbin 2 to the end part and a non- magnetic ring cap 4b for covering the inner peripheral side of the magnetic cap to the outer end in the axial direction is fitted to each end of the bobbin 2 around which a coil 3 wound. The each end of the bobbin 2 is supported by a supporting pipe 5 through the cap 4, and also, a bearing 7 is attached on the outer peripheral side of the supporting pipe, then, the heat roller 1 is freely rotatably supported from the inner surface side. Thus, the magnetic field generated by the coil 3 is efficiently induced to the heat roller 1, and the leakage of the magnetic field toward the outside in the axial direction is interrupted.
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