Title:
【発明の名称】光ディスク用ハブ
Document Type and Number:
Japanese Patent JP3080320
Kind Code:
B2
Abstract:
PURPOSE:To improve the catching durability of an optical disk hub by subjecting the surface of a magnet clamping metallic plate to the ceramic coating treatment. CONSTITUTION:An optical disk hub consists of a metallic plate 2 which is attracted by a magnet provided to a disk table of a disk rotary driver and a ring-shaped member 3 which is used for attachment of the plate 2 to a disk substrate. The plate 2 is oibtained by forming a magnetic thin metallic plate into a disk shape and has a circular spindle hole 4 at center part for engagement with a center spindle. Then the plate 2 is subjected to the ceramic treatment coating so that a ceramic coating film having high hardness and high wear resistance is formed on the surface of the plate 2. Thus the catching durability of the optical disk hub is improved.
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Inventors:
Kenji Takahashi
Seiya Kato
Seiya Kato
Application Number:
JP41618990A
Publication Date:
August 28, 2000
Filing Date:
December 28, 1990
Export Citation:
Assignee:
ソニー株式会社
株式会社加藤スプリング製作所
株式会社加藤スプリング製作所
International Classes:
G11B23/00; G11B7/24097; G11B7/2534; (IPC1-7): G11B23/00; G11B7/24
Domestic Patent References:
| JP1227280A | ||||
| JP647391A | ||||
| JP1127122A |
Attorney, Agent or Firm:
Akira Koike (1 person outside)