JPS55157137A - Reproducing pickup for information recording disc - Google Patents

Reproducing pickup for information recording disc

Info

Publication number
JPS55157137A
JPS55157137A JP6220579A JP6220579A JPS55157137A JP S55157137 A JPS55157137 A JP S55157137A JP 6220579 A JP6220579 A JP 6220579A JP 6220579 A JP6220579 A JP 6220579A JP S55157137 A JPS55157137 A JP S55157137A
Authority
JP
Japan
Prior art keywords
coil body
stylus
cantilever
scanning
magnet
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
JP6220579A
Other languages
Japanese (ja)
Other versions
JPS6155188B2 (en
Inventor
Osamu Hattori
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP6220579A priority Critical patent/JPS55157137A/en
Publication of JPS55157137A publication Critical patent/JPS55157137A/en
Publication of JPS6155188B2 publication Critical patent/JPS6155188B2/ja
Granted legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B21/00Head arrangements not specific to the method of recording or reproducing
    • G11B21/02Driving or moving of heads
    • G11B21/12Raising and lowering; Back-spacing or forward-spacing along track; Returning to starting position otherwise than during transducing operation
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B21/00Head arrangements not specific to the method of recording or reproducing
    • G11B21/16Supporting the heads; Supporting the sockets for plug-in heads
    • G11B21/20Supporting the heads; Supporting the sockets for plug-in heads while the head is in operative position but stationary or permitting minor movements to follow irregularities in surface of record carrier

Abstract

PURPOSE:To make it possible to protect the stylus tip and change stylus pressure for scanning, by providing a coil body near the magnet provided at the back end of the cantilever and by supplying a current to the coil body to displace the scanning stylus at the cantilever tip. CONSTITUTION:Coil body 15 is arranged near magnet 3, which is provided at the back end of cantilever 1 where scanning stylus tip 2 of a reproducing pickup is fitted, in the position where vertical center axis 17 agrees with each other. When a DC current is supplied to coil body 15, coil body 15 becomes an electromagnet, and repulsive force is generated between magnet 3 and coil body 15, and magnet 3 moves downward. Then, cantilever 1 rotates with support damper 5 as the fulcrum, and stylus 2 moves upward. Level 1 rotates at the angle determined by rotation of support damper 5 and the vertical spring constant of head damper 4 and stops. When the current is reduced gradually, stylus tip 2 falls onto the disc surface softly. If a small current is supplied in the course of scanning, stylus pressure can be adjusted finely.
JP6220579A 1979-05-22 1979-05-22 Reproducing pickup for information recording disc Granted JPS55157137A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6220579A JPS55157137A (en) 1979-05-22 1979-05-22 Reproducing pickup for information recording disc

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6220579A JPS55157137A (en) 1979-05-22 1979-05-22 Reproducing pickup for information recording disc

Publications (2)

Publication Number Publication Date
JPS55157137A true JPS55157137A (en) 1980-12-06
JPS6155188B2 JPS6155188B2 (en) 1986-11-26

Family

ID=13193401

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6220579A Granted JPS55157137A (en) 1979-05-22 1979-05-22 Reproducing pickup for information recording disc

Country Status (1)

Country Link
JP (1) JPS55157137A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59149267U (en) * 1983-03-26 1984-10-05 三菱電機株式会社 Video disk player pickup device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5034203A (en) * 1973-07-26 1975-04-02
JPS5079305A (en) * 1973-11-12 1975-06-27
JPS53123024A (en) * 1977-04-01 1978-10-27 Victor Co Of Japan Ltd Pickup unit for signal for rotary recording medium
JPS5424002A (en) * 1977-07-25 1979-02-23 Victor Co Of Japan Ltd Reproducer of optical information recording medium discs

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5034203A (en) * 1973-07-26 1975-04-02
JPS5079305A (en) * 1973-11-12 1975-06-27
JPS53123024A (en) * 1977-04-01 1978-10-27 Victor Co Of Japan Ltd Pickup unit for signal for rotary recording medium
JPS5424002A (en) * 1977-07-25 1979-02-23 Victor Co Of Japan Ltd Reproducer of optical information recording medium discs

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59149267U (en) * 1983-03-26 1984-10-05 三菱電機株式会社 Video disk player pickup device
JPH0135343Y2 (en) * 1983-03-26 1989-10-27

Also Published As

Publication number Publication date
JPS6155188B2 (en) 1986-11-26

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