Abstract: A dynamic pressure bearing apparatus having high performance and excellent stability without hindering operations of appliances due to a leaked oil, the dynamic pressure bearing apparatus including: a rotating shaft inclined in a predetermined direction from a vertical direction; a sleeve rotatably supporting the rotating shaft; an operating fluid for generating a dynamic pressure, the operating fluid being filled in a gap formed between the sleeve and the rotating shaft; and a capturing device for capturing the operating fluid leaked from the gap, the capturing device being disposed on an outside surface of the sleeve in the predetermined direction.

Abstract: To provide a dynamic pressure bearing apparatus having high performance and excellent stability without hindering operations of appliances due to a leaked oil, the dynamic pressure bearing apparatus of the present invention comprises; a rotating shaft inclined in a predetermined direction from a vertical direction; a sleeve rotatably supporting the rotating shaft; an operating fluid for generating a dynamic pressure, the operating fluid being filled in a gap formed between the sleeve and the rotating shaft; and capturing means for capturing the operating fluid leaked from the gap, the capturing means being disposed on an outside surface of the sleeve in the predetermined direction.

Abstract: In this invention, an excitation current is switched in accordance with a change in number of phases so as to reduce an excitation current per phase in a 2-phase mode to be smaller than that in a 1-phase mode. The excitation current in the 2-phase mode is set to be about 0.6 to 0.8 times larger than that in the 1-phase mode, so that a constant torque is always generated.

Abstract: A lens barrel provided therein with a hollow cylindrical permanent magnet having a permanent magnet portion for stepping drive and a magnet portion for brushless drive, a step driving coil and a brushless driving coil, and a focusing lens system axially moved by the rotary motion of the cylindrical permanent magnet. In case the amount of movement of the lens system required for bringing it to the focused position exceeds a determined value, the lens system is moved to a position corresponding to the determined value by the rotary motion of the brushless driving permanent magnet portion, and in case the above-mentioned amount is equal to or less than the determined value, the lens system is brought to the focused position by the rotary motion of the step driving permanent magnet portion.