| 摘要 |
A projecting portion 23 h is integrally provided at a first connecting portion 23 e of a bobbin 23. The projecting portion 23 h has a triangular cross-section taken in an orthogonal direction orthogonal to a laminating direction of the steel plates 21 and parallel to magnetic steel plates 21. The section of the projecting portion is geometrically similar in shape to a cross-section of a fitting recessed portion 7 a taken in the orthogonal direction. The cross-section of the projecting portion 23 h is substantially the same in size as or slightly smaller than the cross-section of the fitting recessed portion 7 a. With this arrangement, when one ends of six magnetic columns 13 of a magnetic pole constituent member 9 are brought into engagement with six fitting recessed portions 7 a, projecting portions 23 h passes through the fitting recessed portions 7 a and come out of the fitting recessed portions 7 a.
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