| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve heat radiation by forming a bobbin for winding an electric wire of a nonmagnetic metal, and making a slit so that the bobbin may not turn once in the winding direction. SOLUTION: A bobbin 1 is formed of a nonmagnetic material and its central part is provided with an opening to which a core is inserted, and winding blocks are provided to the both ends of the bobbin so that the winding may not be pulled out. Further the bobbin 1 is provided with a slit on a part from the opening of the central part through to the periphery. The slit 3 can block one turning of the metallic bobbin 1 in the winding direction. The bobbin 1 is provided with a heat radiation fin 5 on its upper part and a fitting part 8 is formed on its lower part, where a screw hole 7 for fitting is formed so as to fit the bobbin 1 by a fitting screw 6. In addition, if the covering of the winding cannot sufficiently insulate between the winding 4 and bobbin 1, the contact surface of the bobbin 1 with the winding 4 is oxidized to make it an insulative oxidized metal.</p> |
