Patent US4696566A successfully refreshed from Google Patents.
US4696566A
Expired / Lapsed
US
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Three-dimensional driving arrangement
Assignee: Sharp Corp
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Filing: 1985-02-01
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Granted: 1987-09-29
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Expires: 2005-02-01
Abstract
Abstract A three-dimensional driving arrangement of an objective lens or the like, which is so arranged that coils for focusing control, tracking control and tangential control in three directions are disposed in one magnetic gap for compact size, while the coils for the tracking control and tangential control are each formed to have a V-shaped cross section, with going passage arms of the coils being disposed in the magnetic gap, but returning passage arms of them being disposed outside the magnetic gap through four slit-like notches formed in a yoke, thus making it possible to drive the objective lens independently in three directions.
Inventors
- 👤 Yoshihiro Sekimoto
- 👤 Shigeo Terashima
- 👤 Kunio Kojima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:18
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/08; G11B7/081; G11B7/09; G11B7/0925; G11B7/093; G11B7/0932
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A three-dimensional driving arrangement for an objective lens, which comprises an objective lens support member having an objective lens provided at a central portion thereof, a driving means for driving said objective lens support member vertically and horizontally in three directions, and elastic members respectively provided at upper and lower portions of the objective lens support member for movably supporting said support member and for effecting damping action in the respective vertical and horizontal directions, said elastic members being reduced in thickness in the vertical direction and each formed, in a top plan view thereof, generally into a shape of a figure eight provided with constricted portions respectively in the two horizontal directions.
Claim 2
Dependent Claim
113 words
A three-dimensional driving arrangement for an objective lens, which comprises an objective lens support member having an objective lens provided at a central portion thereof, a driving means for driving said objective lens support member vertically and horizontally in three directions, and elastic members respectively provided at upper and lower portions of the objective lens support member for movably supporting said support member and for effecting damping action in the respective vertical and horizontal directions, said elastic members being reduced in thickness in the vertical direction and each formed, in a top plan view thereof, generally into a shape of a figure eight provided with constricted portions respectively in the two horizontal directions.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-09-28 | 1991-03-30 | 1991-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-28 | 1995-03-30 | 1995-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-28 | 1999-03-30 | 1999-09-29 | $7700.00 | Window Closed / Lapsed |