| 摘要 |
A leaf spring is inserted into a holding groove defined in a holder of a bearing device from end-opened portions. Next, a shaft is inserted into the holding groove so that a small-diameter portion is supported by shaft holes. As a result, arcuate portions of the leaf spring are brought into surface contact with the outer peripheral surface of the small-diameter portion of the shaft and hold the small-diameter portion so that the small-diameter portion is enveloped from both sides. The arcuate portions are pressed by a plurality of ribs. Since the leaf spring is pressed by wall surfaces of the holding groove at all times, a frictional force between the leaf spring and the shaft is kept constant and a resisting torque is stabilized.
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