JPS5720915A - Rotor for rotary magnetic head - Google Patents

Rotor for rotary magnetic head

Info

Publication number
JPS5720915A
JPS5720915A JP9671180A JP9671180A JPS5720915A JP S5720915 A JPS5720915 A JP S5720915A JP 9671180 A JP9671180 A JP 9671180A JP 9671180 A JP9671180 A JP 9671180A JP S5720915 A JPS5720915 A JP S5720915A
Authority
JP
Japan
Prior art keywords
rotor
rotary body
rotary
magnetic head
final package
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.)
Granted
Application number
JP9671180A
Other languages
Japanese (ja)
Other versions
JPS645372B2 (en
Inventor
Kiyoshi Nagatani
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 JP9671180A priority Critical patent/JPS5720915A/en
Publication of JPS5720915A publication Critical patent/JPS5720915A/en
Publication of JPS645372B2 publication Critical patent/JPS645372B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/52—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with simultaneous movement of head and record carrier, e.g. rotation of head
    • G11B5/53—Disposition or mounting of heads on rotating support

Abstract

PURPOSE:To keep the dynamic balance of a rotary body including a rotor for a rotary magnetic head in a final package state automatically with high precision, by providing a dynamic balancing mechanism at one end of the rotor in its rotary shaft direction. CONSTITUTION:At one end in the rotary shaft direction, a rotor 11 for a rotary magnetic head is equipped with a dynamic balancing mechanism consisting of an external ring 7 for an annular steel-ball guide track, an internal ring 8 for the annular steel-ball guide track, and several steel balls 9 held in a groove formed between the external fing 7 and internal ring 8. When the rotary body of the assembly in a final package state and the steel balls 9 resonate at some resonance frequency during the stationary rotation of the rotary body, the steel balls 9 move automatically where the mass unbalance of the rotary body is canceled, thus holding the dynamic balance of the rotary body. This constitution eliminates the need for the mechanical addition and reduction of the mass, and keeps the high-precision balance automatically in the final package state.
JP9671180A 1980-07-15 1980-07-15 Rotor for rotary magnetic head Granted JPS5720915A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9671180A JPS5720915A (en) 1980-07-15 1980-07-15 Rotor for rotary magnetic head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9671180A JPS5720915A (en) 1980-07-15 1980-07-15 Rotor for rotary magnetic head

Publications (2)

Publication Number Publication Date
JPS5720915A true JPS5720915A (en) 1982-02-03
JPS645372B2 JPS645372B2 (en) 1989-01-30

Family

ID=14172327

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9671180A Granted JPS5720915A (en) 1980-07-15 1980-07-15 Rotor for rotary magnetic head

Country Status (1)

Country Link
JP (1) JPS5720915A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6061325A (en) * 1998-03-25 2000-05-09 International Business Machines Corporation Dual mode auto-balancer for DVD drives
US6198715B1 (en) * 1996-09-17 2001-03-06 Hitachi, Ltd. Disc device having disc in balance correcting arrangements
US6252841B1 (en) * 1997-10-30 2001-06-26 Funai Electric Co., Ltd. Optical disc apparatus and method for controlling turntable rotation
US6704271B2 (en) * 1996-07-19 2004-03-09 Matsushita Electric Industrial Co., Ltd. Disk drive apparatus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6704271B2 (en) * 1996-07-19 2004-03-09 Matsushita Electric Industrial Co., Ltd. Disk drive apparatus
US6198715B1 (en) * 1996-09-17 2001-03-06 Hitachi, Ltd. Disc device having disc in balance correcting arrangements
US6252841B1 (en) * 1997-10-30 2001-06-26 Funai Electric Co., Ltd. Optical disc apparatus and method for controlling turntable rotation
US6392983B1 (en) * 1997-10-30 2002-05-21 Funai Electric Co., Ltd. Optical disc apparatus and method for controlling turntable rotation
US6061325A (en) * 1998-03-25 2000-05-09 International Business Machines Corporation Dual mode auto-balancer for DVD drives

Also Published As

Publication number Publication date
JPS645372B2 (en) 1989-01-30

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