| 摘要 |
PROBLEM TO BE SOLVED: To prevent disorder of a coil by forming a protruding part with a circumferential groove which guides a main part, compensating dislocation at a dislocation part using a spacer, and comprising a flat surface where the protruding part is so disconnected as to correspond to the dislocation part. SOLUTION: A bobbin 1 comprises a cylindrical part 2 around which a coil is wound and an outward flange 3 provided integrally on both ends, in axial direction, of the cylindrical part 2. On the outside peripheral surface of the cylindrical part 2, a plurality of protruding parts 5 which form a plurality of grooves 4 circumferentially extending half round for guiding the main part of the coil as well as two flat surfaces 6 where a protruding part 5 is disconnected at each half wound according to the dislocation part of the coil are formed. The groove 4 on one side of the flat surface 6 is deviated from that on the other side in axial direction by a half pitch. To compensate the dislocation, a spacer 7 extending almost half round is added on the inside of one flange 3, for compensating dislocation at the dislocation part of the coil.
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