Rotating disk storage device

Details Rotating disk storage device Rotating disk storage device

2004-07-16

2008-09-02

Wellington, Andrea (Department: 2627)

Dynamic magnetic information storage or retrieval

Head mounting

For shifting head between tracks

C360S097020, C360S264800, C360S264900, C360S265000, C360S266400, C360S266700, C360S266800, C360S266900

Reexamination Certificate

active

07420782

ABSTRACT:
Embodiments of the present invention provide a rotating disk storage device adopting a thin yoke structure. In one embodiment, the yoke structure of a voice coil motor includes a base of a casing formed from a ferromagnetic material; an auxiliary yoke disposed so as to be magnetically coupled to the base; a magnet disposed so as to be magnetically coupled to a front surface of the auxiliary yoke; and a main yoke provided with yoke legs magnetically coupled to the auxiliary yoke and an opposing surface that confronts a front surface of the magnet. In addition, a yoke gap is defined between the opposing surface and the front surface of the magnet. The base and the auxiliary yoke form a magnetic path, which allows a dedicated yoke on a lower portion to be eliminated.

REFERENCES:
patent: 5122702 (1992-06-01), Nakazato
patent: 6002546 (1999-12-01), Yagi et al.
patent: 6347023 (2002-02-01), Suwa
patent: 6445549 (2002-09-01), Okunaga et al.
patent: 6603633 (2003-08-01), Heaton et al.
patent: 11-185412 (1999-07-01), None

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