| 摘要 |
PROBLEM TO BE SOLVED: To prevent the uneven wear of a turning face in a bearing region of a motor shaft and the generation of abnormal wear noise, to reduce the impregnated oil consumption of a bearing, and to stabilize the rotation and a current of a motor. SOLUTION: The motor shaft 2 of the small-sized motor 1 is supported by the bearing 5 impregnated with lubrication oil so as to be turnable, and the bearing 5 is press-fitted to a recess 4a of a bracket 4. In this case, the tip face 1a of the motor shaft 2 does not penetrate the lower end face 5a of the bering 5 and does not protrude outward. A run-off 6 is formed between a notch 5b and the round corner 2c of the motor shaft 2 by forming the notch 5b at the lower end face 5a of the bearing 5. The round corner 2c of the motor shaft 2 thereby does not contact with the internal face of the bearing 5, and only a linear part 2b is held to the bearing 5 so as to turn in face-contact with the bearing. COPYRIGHT: (C)2005,JPO&NCIPI
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