| 摘要 |
PURPOSE:To improve the durability and the vibration-resistance of a sliding part, by arranging a magnetic material at a position confronting with the yoke of an objective lens holding plate. CONSTITUTION:By attaching the magnetic material 22 on the side plane of the objective lens holding plate 15 and arranging it so as to confront with the yoke 21, the magnetic material 22 receives an suction force by leakage flux from the yoke 21, and is attracted to the yoke 21 side. Therefore, when an optical disk device is used vertically, a bearing part 14 is pressed to a supporting shaft 16 in one direction due to the dead weight of a movable part such as the objective lens holding plate 15, etc., but, it is possible to reduce or offset a pressing force put on the supporting shaft 16 by the suction force. Also, when the device is used horizontally, the suction force acts as a force to press the bearing part 14 on the supporting shaft 16, but, the pressing force at that time is less than around the weight of the movable part at the most, and also, only a small amount of change of the pressing force exists at the time of turning or sliding the objective lens holding plate 15. In such a way, it is possible to improve the vibration-resistance and the impact-resistance of the sliding part.
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