| 摘要 |
PROBLEM TO BE SOLVED: To reliably position and fix magnets in the circumferential direction without forming any hole in a yoke. SOLUTION: A washer pump comprises a resin case 10, a pump cover, a motor cover, a yoke 30, magnets 41 and 42, a positioning means to position and fix the magnets in the circumferential direction, an armature, an armature shaft, and an impeller. As the positioning means, a stopper piece 16 advancing in a first space 43 between end parts in the circumferential direction of the magnets 41 and 42 when the yoke 30 is fitted in the resin case 10 is protruded from a bottom wall 11 of the resin case 10, and a U-shaped spring 70 inserted from a back side in a second space 44 between end parts in the circumferential direction of the magnets 41 and 42 to press the magnets 41 and 42 against the stopper piece 16 and fix the magnets thereto is provided. A plurality of projections 31 forming receivers of the U-shaped spring 70 are formed on an inner circumferential surface of the yoke 30. COPYRIGHT: (C)2004,JPO
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