Objective lens driving device enabling speed-up of optical disk drive
First Claim
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1. An objective lens driving device comprising:
- a lens holder being movable and holding an objective lens;
coil devices disposed around said objective lens and held by said lens holder;
main magnets disposed around said objective lens and applying driving forces to said coil devices according to energization to said coil devices; and
auxiliary magnets each disposed each between adjacent ones of said coil devices and applying forces to said coil devices according to the energization to said coil devices for supplementing said driving forces.
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Abstract
In an objective lens driving device having a lens holder which is movable and holds an objective lens, coil devices are disposed around the objective lens and held by the lens holder. Around the objective lens, main magnets are disposed for applying driving forces to the coil devices according to energization to the coil devices. Furthermore, each of auxiliary magnets are disposed between adjacent ones of the coil devices. The auxiliary magnets apply forces to the coil devices according to the energization to the coil devices for supplementing the driving forces.
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Citations
15 Claims
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1. An objective lens driving device comprising:
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a lens holder being movable and holding an objective lens;
coil devices disposed around said objective lens and held by said lens holder;
main magnets disposed around said objective lens and applying driving forces to said coil devices according to energization to said coil devices; and
auxiliary magnets each disposed each between adjacent ones of said coil devices and applying forces to said coil devices according to the energization to said coil devices for supplementing said driving forces. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An optical pickup for irradiating a beam onto an optical medium and detecting a reflected beam reflected from said optical medium, said optical pickup including an objective lens driving device which comprises:
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a damper base;
a suspension member elastically supporting said lens holder with respect to said damper base; and
a damper member interposed between said damper base and said lens holder for separating, in terms of vibration, said lens holder from said damper base, said damper base being movably supported.
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Specification