JPS5720914A - Rotor for rotary magnetic head - Google Patents

Rotor for rotary magnetic head

Info

Publication number
JPS5720914A
JPS5720914A JP9671080A JP9671080A JPS5720914A JP S5720914 A JPS5720914 A JP S5720914A JP 9671080 A JP9671080 A JP 9671080A JP 9671080 A JP9671080 A JP 9671080A JP S5720914 A JPS5720914 A JP S5720914A
Authority
JP
Japan
Prior art keywords
rotary
rotary body
rotor
magnetic head
steel
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
JP9671080A
Other languages
Japanese (ja)
Other versions
JPS645371B2 (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 JP9671080A priority Critical patent/JPS5720914A/en
Publication of JPS5720914A publication Critical patent/JPS5720914A/en
Publication of JPS645371B2 publication Critical patent/JPS645371B2/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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M1/00—Testing static or dynamic balance of machines or structures
    • G01M1/30—Compensating imbalance
    • G01M1/36—Compensating imbalance by adjusting position of masses built-in the body to be tested

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)

Abstract

PURPOSE:To keep the dynamic balance of a rotary body including a rotary magnetic head precisely in a short time, by providing a dynamic balancing mechanism made of prescribed shape storage alloy at one end of a rotor for the rotary magnetic head in its rotary shaft direction. CONSTITUTION: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 made of shape storage alloy, an internal ring 8 for the annular steel- ball guide track, and steel balls 9 held in a groove formed between the external and internal rings at one end in the rotary shaft direction. For the dynamic balance of an assembly of a rotary body of the rotor 11 and a rotary transformer 12, it is rotated, and consequently if the rotary body and the steel balls 9 resonate at some resonance frequency, the balls 9 are positioned where the mass unbalance of the rotary body is canceled. In this state, fixing the steel ball keeps the mass balance of the rotary body. Thus, the dynamic balance of the rotary body is kept easily in an extremely short time with high precision.
JP9671080A 1980-07-15 1980-07-15 Rotor for rotary magnetic head Granted JPS5720914A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9671080A JPS5720914A (en) 1980-07-15 1980-07-15 Rotor for rotary magnetic head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9671080A JPS5720914A (en) 1980-07-15 1980-07-15 Rotor for rotary magnetic head

Publications (2)

Publication Number Publication Date
JPS5720914A true JPS5720914A (en) 1982-02-03
JPS645371B2 JPS645371B2 (en) 1989-01-30

Family

ID=14172297

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9671080A Granted JPS5720914A (en) 1980-07-15 1980-07-15 Rotor for rotary magnetic head

Country Status (1)

Country Link
JP (1) JPS5720914A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0434270A2 (en) * 1989-12-18 1991-06-26 International Business Machines Corporation Balancing method and means for rotary units

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0434270A2 (en) * 1989-12-18 1991-06-26 International Business Machines Corporation Balancing method and means for rotary units

Also Published As

Publication number Publication date
JPS645371B2 (en) 1989-01-30

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