Title:
【発明の名称】磁気ディスク装置の磁気ヘッド位置決め機構
Document Type and Number:
Japanese Patent JP2972497
Kind Code:
B2
Abstract:
A magnetic head positioner for a magnetic disk apparatus has an arm holder rotatably supported on a shaft by a plurality of bearings. The arm holder provides a plurality of arms carrying magnetic heads for writing and reading data at tip ends thereof. A first cylindrical sleeve is interposed between the bearings and the arm holder and fixed to the outer peripheral surface of the bearings. The first cylindrical sleeve is also made of a material having a linear expansion coefficient substantially the same as that of the shaft. A pair of second cylindrical sleeves are interposed between the bearings and the arm holder and fixed to the first cylindrical sleeve at one end portion thereof and to the inner peripheral surface of the arm holder at the other end portion thereof. The pair of second cylindrical sleeves are also made of a material having substantially the same linear expansion coefficient substantially as that of the arm holder. Thermal offtracking of the magnetic heads with respect to the disk is thus minimized.
Inventors:
SANADA YOTARO
Application Number:
JP21847493A
Publication Date:
November 08, 1999
Filing Date:
September 02, 1993
Export Citation:
Assignee:
NIPPON DENKI KK
International Classes:
G11B21/16; G11B25/04; G11B21/02; (IPC1-7): G11B21/02; G11B21/16
Domestic Patent References:
| JP4360077A | ||||
| JP3272062A | ||||
| JP63188872A | ||||
| JP3254472A |
Attorney, Agent or Firm:
Naoki Kyomoto (2 outside)