JPS5698760A - Magnetic disk device - Google Patents

Magnetic disk device

Info

Publication number
JPS5698760A
JPS5698760A JP118580A JP118580A JPS5698760A JP S5698760 A JPS5698760 A JP S5698760A JP 118580 A JP118580 A JP 118580A JP 118580 A JP118580 A JP 118580A JP S5698760 A JPS5698760 A JP S5698760A
Authority
JP
Japan
Prior art keywords
magnetic
sleeve
spindle
magnetic disk
constitution
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP118580A
Other languages
Japanese (ja)
Inventor
Yukinobu Masuda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP118580A priority Critical patent/JPS5698760A/en
Publication of JPS5698760A publication Critical patent/JPS5698760A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B25/00—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus
    • G11B25/04—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus using flat record carriers, e.g. disc, card
    • G11B25/043—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus using flat record carriers, e.g. disc, card using rotating discs

Abstract

PURPOSE:To prevent dust from entering into a housing while preventing magnetic flux from leaking from a spindle, by using a nonmagnetic material for the spindle rotating a magnetic disk and a magnetic material for a sleeve of a magnetic fluid sealing part. CONSTITUTION:On bearing 3, sleeve 6 of a magnetic material, hub 10 and spacer 8 are provided and they are tightened up by screw 9. Further, since the gap between sealing body 4 and sleeve 6 fixed to housing 7 is filled with magnetic fluid 5, a magnetic field provided by magnet 12 operates in a closed loop mode through yoke 11, magnetic fluid 5, etc. In this constitution, even if sleeve 6 rotates at a high speed together with spindle 2, grease, etc., in bearing 3 doe's not enter into the side of magnetic disk 1. In addition, the leakage of the magnetic flux is prevented because spindle 2 is made of a nonmagnetic material.
JP118580A 1980-01-09 1980-01-09 Magnetic disk device Pending JPS5698760A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP118580A JPS5698760A (en) 1980-01-09 1980-01-09 Magnetic disk device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP118580A JPS5698760A (en) 1980-01-09 1980-01-09 Magnetic disk device

Publications (1)

Publication Number Publication Date
JPS5698760A true JPS5698760A (en) 1981-08-08

Family

ID=11494384

Family Applications (1)

Application Number Title Priority Date Filing Date
JP118580A Pending JPS5698760A (en) 1980-01-09 1980-01-09 Magnetic disk device

Country Status (1)

Country Link
JP (1) JPS5698760A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61269282A (en) * 1985-05-24 1986-11-28 Fujitsu Ltd Magnetic disk device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61269282A (en) * 1985-05-24 1986-11-28 Fujitsu Ltd Magnetic disk device
JPH0330945B2 (en) * 1985-05-24 1991-05-01 Fujitsu Ltd

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