| 摘要 |
PURPOSE:To manufacture a motor less defective and inexpensive by forming projection in a yoke opposite to the teeth and forming the mating portion of this projection with the tooth into a circular arc and that by punching out the projection and the tooth with their positions circumferentially deviated. CONSTITUTION:A tooth 2 is connected to each other with a blind slot 1. Between the neighbouring teeth 2 a slot 3 is formed. On the other hand, on the outside of the tooth 2 a doughnut-shaped yoke 4 is formed, where a projection 5 is formed which projects to the internal diameter side. In addition, this projection 5 is formed on the internal diameter side with an circular area 6, taking the same shape as in a circular arc 7 formed on the external diameter side of the tooth 2. The circular arcs 6 and 7 are composed so that they can fit each other. The positions of the projection 5 and the tooth 2 are circumferentially shifted different from under the condition where they are fitted. They are punched with a press from steel strap in this state.
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