| 摘要 |
PURPOSE:To enable a magnetic pole to the firmly fixed on a yoke, by pressure- filling up concave sections set on the yoke, with a part of a retaining frame provided with an aperture for inserting the magnetic pole, and by pressing the peripheral section of the aperture. CONSTITUTION:A retaining frame 4 is fitted on the inner peripheral surface of a yoke 2 by inserting a magnetic pole 3 into an aperture 4a set for the insertion thereof. Then, a part of the retaining frame 4 is pressed against concave sections 2a, 2b set on the yoke 2 so that the sections 2a, 2b may be filled up with a part of the frame 4, and the peripheral section of the aperture 4a is pressed so that the magnetic pole 3 may be pushed against the yoke 2. By this method, the magnetic pole 3 is firmly fixed and retained on the yoke 2 by the retaining frame 4, and the magnetic pole 3 can be firmly fixed on the yoke 2.
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