JPS5525834A - Protective device for magnetic disk unit - Google Patents

Protective device for magnetic disk unit

Info

Publication number
JPS5525834A
JPS5525834A JP9782378A JP9782378A JPS5525834A JP S5525834 A JPS5525834 A JP S5525834A JP 9782378 A JP9782378 A JP 9782378A JP 9782378 A JP9782378 A JP 9782378A JP S5525834 A JPS5525834 A JP S5525834A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
head
magnetic
magnetic head
magnetic disk
repetitive
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
JP9782378A
Inventor
Susumu Mizuno
Original Assignee
Nec Corp
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

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/50Reconditioning of record carriers; Cleaning of record carriers; Carrying-off electrostatic charges
    • G11B23/505Reconditioning of record carriers; Cleaning of record carriers; Carrying-off electrostatic charges of disk carriers
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/41Cleaning of heads

Abstract

PURPOSE:To reduce the frequency of the head crush by detecting the contactors via the acoustic discharge detector for the magnetic head and the magnetic disk and then giving the repetitive and reciprocal positioning control to the magnetic head with a larger distance than the head slider width. CONSTITUTION:When a contact (head hit) occurs between the magnetic head and the magnetic disk, the contact is detected via the acoustic discharge detector consisting of piezoelectric element 1 loaded to the tip part of the magnetic head, capacitor 2 of the resonance circuit and coil 3. And in case the detection signal caused by the head hit becomes continuous exceeding the prescribed level, carriage 21 is shifted by control part 20 to give the repetitive and reciprocal positioning control to the magnetice head with a larger distance than the slider width of the magnetic head. As a result, the dust or stains sticking to the magnetic head and the magnetic disk can be removed.
JP9782378A 1978-08-11 1978-08-11 Protective device for magnetic disk unit Pending JPS5525834A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9782378A JPS5525834A (en) 1978-08-11 1978-08-11 Protective device for magnetic disk unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9782378A JPS5525834A (en) 1978-08-11 1978-08-11 Protective device for magnetic disk unit

Publications (1)

Publication Number Publication Date
JPS5525834A true true JPS5525834A (en) 1980-02-23

Family

ID=14202441

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9782378A Pending JPS5525834A (en) 1978-08-11 1978-08-11 Protective device for magnetic disk unit

Country Status (1)

Country Link
JP (1) JPS5525834A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57200971A (en) * 1981-06-01 1982-12-09 Hitachi Ltd Magnetic disk storage device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57200971A (en) * 1981-06-01 1982-12-09 Hitachi Ltd Magnetic disk storage device
JPH0355909B2 (en) * 1981-06-01 1991-08-26

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