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AssigneeKoninklijke Philips Electronics N.V.
InventorWaltherus Cornelis Jozef Bierhoff
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The invention provides a drive system for driving a lens holder (6) of the optical system in a disk drive unit. It comprises a movable part (8) connected to the lens holder, and a base (7) including a guide (9) for guiding the movable part. A drive motor comprises a stator (12) fixed with respect to the base and a translator (13) movable with respect to the stator upon actuation of the motor. A return mechanism (21) is connected between the translator and the movable part for bringing the rotor/translator in a starting position with respect to the movable part in a rest condition of the drive motor. A portion (18) of the movable part is in the path of movement of the translator, while there is a free stroke (20) between the portion of the movable part and the translator in the starting position of the translator. As a result, the translator will hit the movable part, thereby overcoming the static friction between the movable part and the base.
A drive system for driving a movable part (8), comprising a base (7) including a guide (9) for guiding the movable part, a drive motor comprising a stator (12) fixed with respect to the base and a rotor/translator (13) movable with respect to the stator upon actuation, and a return mechanism (21) connected between the rotor/translator and the movable part for bringing the rotor/translator in a starting position with respect to the movable part in a rest condition of the drive motor, wherein a portion (18) of the movable part (8) is in the path of movement of the rotor/translator (13), and wherein there is a free stroke (20) between said portion of the movable part and the rotor/translator in the starting position of the rotor/ translator.
Dependencies are inferred from the claim text.