| 摘要 |
PROBLEM TO BE SOLVED: To realize a permanent magnet field starter motor which enables the alignment precision between a permanent magnet and a brush, while the manufacturing cost is not increased. SOLUTION: An annular expanded opening 53 whose inner circumference diameterϕa is larger than the inner circumference diameter of a yoke 5 is formed on the end part of the yoke 5. The outer diameterϕb of a holder plate 4 is so set as to satisfy a relationϕa>=ϕb. The holder plate 4 is inserted into the expanded opening 53, and the yoke 5 and the plate 4 are radially aligned with each other directly. A notched groove 54 into which a bush 71 is fitted is formed in the yoke 5. The bush 71 is fitted into the notched groove 54 to determine the thrust direction positions of an external lead wire 7c, a lead terminal 7 and a lead wire 7a. A protrusion 44 is formed on the plate 4 and the width B of the protrusion 44 and the width A of the notched groove 53 are so set as to satisfy a relation A>=B. By inserting the protrusion 44 into the notched groove 54, the yoke 5 and the plate 4 are aligned with each other in a circumferential direction.
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