Coil rotation preventing structure for optical pick-up actuator

Details Coil rotation preventing structure for optical pick-up actuator Coil rotation preventing structure for optical pick-up actuator

2004-12-13

2010-02-02

Wellington, Andrea L (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C720S683000

Reexamination Certificate

active

07656756

ABSTRACT:
An optical pickup actuator includes a lens holder on which tracking and focusing coils are attached, at least one of the coils being a polygon coil having at least two sides that are different in a length from each other, magnets disposed facing the coils, and a rotation preventing unit formed on the lens holder. The rotation preventing unit surface-contacts an inner surface of the polygon coil to prevent the polygon coil from being twisted.

REFERENCES:
patent: 5617256 (1997-04-01), Mitsumori et al.
patent: 5949590 (1999-09-01), Hong
patent: 6317277 (2001-11-01), Izumino et al.
patent: 6504813 (2003-01-01), Suzuki et al.
patent: 2003/0021218 (2003-01-01), Song et al.

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