| 摘要 |
A bearing (11) in a motor according to the present invention includes an inner ring (11a) having a top end surface (11d), an outer ring (11b), and a ball (11c) between the inner ring (11a) and the outer ring (11b). A pressure spring (12) is inserted into a rotary shaft (3) and positioned between a core (4) and the bearing (11) to provide an energizing force along the axial direction of the rotary shaft (3). The outer ring (11b) is pressed into a bearing holder (9a). The inner ring (11a) is fitted to the rotary shaft (3) with a gap (15) therebetween. The top end surface (11d) of the inner ring (11a) is in contact with the pressure spring (12). To the area on which the upper end surface (11d) and the pressure spring (12) are in contact with each other, the pressure spring (12) applies energizing forces with different strengths in a circumferential direction with the axial direction as the center. |
