JPS5555480A - Position detection unit of tone arm - Google Patents

Position detection unit of tone arm

Info

Publication number
JPS5555480A
JPS5555480A JP12722078A JP12722078A JPS5555480A JP S5555480 A JPS5555480 A JP S5555480A JP 12722078 A JP12722078 A JP 12722078A JP 12722078 A JP12722078 A JP 12722078A JP S5555480 A JPS5555480 A JP S5555480A
Authority
JP
Japan
Prior art keywords
arm
tone arm
film plate
decision
plate
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
JP12722078A
Other languages
Japanese (ja)
Inventor
Goro Abe
Fumio Ito
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP12722078A priority Critical patent/JPS5555480A/en
Publication of JPS5555480A publication Critical patent/JPS5555480A/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
    • G11B3/00—Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor
    • G11B3/02—Arrangements of heads
    • G11B3/08—Raising, lowering, traversing otherwise than for transducing, arresting, or holding-up heads against record carriers
    • G11B3/085—Raising, lowering, traversing otherwise than for transducing, arresting, or holding-up heads against record carriers using automatic means
    • G11B3/08503—Control of drive of the head
    • G11B3/08506—Control of drive of the head for pivoting pick-up arms
    • G11B3/08512—Control of drive of the head for pivoting pick-up arms using optical detecting means

Abstract

PURPOSE:To detect an arbitrary position of the tone arm on a record disc by providing a film plate, where a slit group is formed, on a sensor plate which moves according to rotation of the tone arm. CONSTITUTION:Film plate 3 fitted to sensor plate 2 moves in the arrow direction according to rotation of tone arm axis 1, and the light from luminous element 12 is incident onto light receiving element 15 through film plate 3. When all of the first to the sixth slits are transparent, the emitter of the light receiving element is high- level, and decision is ''111111''. If decision is expressed by decimal numbers in this manner, 64 kinds of arm position can be taken as digital information. This position information is stored through an A-D converter, and the arm driver is operated on a basis of stored position information, so that an arbitrary position of the arm on the record disc can be detected.
JP12722078A 1978-10-16 1978-10-16 Position detection unit of tone arm Pending JPS5555480A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12722078A JPS5555480A (en) 1978-10-16 1978-10-16 Position detection unit of tone arm

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12722078A JPS5555480A (en) 1978-10-16 1978-10-16 Position detection unit of tone arm

Publications (1)

Publication Number Publication Date
JPS5555480A true JPS5555480A (en) 1980-04-23

Family

ID=14954688

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12722078A Pending JPS5555480A (en) 1978-10-16 1978-10-16 Position detection unit of tone arm

Country Status (1)

Country Link
JP (1) JPS5555480A (en)

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