JPS6443057A - Disc reproducing device - Google Patents

Disc reproducing device

Info

Publication number
JPS6443057A
JPS6443057A JP19710087A JP19710087A JPS6443057A JP S6443057 A JPS6443057 A JP S6443057A JP 19710087 A JP19710087 A JP 19710087A JP 19710087 A JP19710087 A JP 19710087A JP S6443057 A JPS6443057 A JP S6443057A
Authority
JP
Japan
Prior art keywords
driving coil
permanent magnet
speed
leakage flux
speed detector
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
JP19710087A
Other languages
Japanese (ja)
Other versions
JP2557404B2 (en
Inventor
Noboru Aoyama
Takuo Ono
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.)
Toshiba Corp
Original Assignee
Toshiba 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 Toshiba Corp filed Critical Toshiba Corp
Priority to JP62197100A priority Critical patent/JP2557404B2/en
Publication of JPS6443057A publication Critical patent/JPS6443057A/en
Application granted granted Critical
Publication of JP2557404B2 publication Critical patent/JP2557404B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Moving Of Head For Track Selection And Changing (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
  • Testing Electric Properties And Detecting Electric Faults (AREA)

Abstract

PURPOSE:To make it possible to carry out the moving control of a pickup accurately by reversing the polarity of a permanent magnet of a speed detector. CONSTITUTION:The direction of magnetic flux passing through a yoke member 14(a) of the part surrounded by a driving coil 14(d) is in an opposite direction to the direction in which the leakage flux X generated from a driving coil 13(d) of a linear motor 13 passes through the driving coil 14(d) by effects of a permanent magnet 14(b) of a speed detector 14. Accordingly, the leakage flux X is distorted so as to take such a path that does not pass through the driving coil 14(d). Therefore, no adverse influence is given to a speed signal outputted from the driving coil 14(d), and the speed detection of an optical pickup 11 can be accurately made by a simple constitution, and the shortening of a data access time can be promoted.
JP62197100A 1987-08-06 1987-08-06 Disc playback device Expired - Lifetime JP2557404B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62197100A JP2557404B2 (en) 1987-08-06 1987-08-06 Disc playback device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62197100A JP2557404B2 (en) 1987-08-06 1987-08-06 Disc playback device

Publications (2)

Publication Number Publication Date
JPS6443057A true JPS6443057A (en) 1989-02-15
JP2557404B2 JP2557404B2 (en) 1996-11-27

Family

ID=16368724

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62197100A Expired - Lifetime JP2557404B2 (en) 1987-08-06 1987-08-06 Disc playback device

Country Status (1)

Country Link
JP (1) JP2557404B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100743611B1 (en) 2006-03-28 2007-08-01 최광술 Cable control system industrial robot

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63178755A (en) * 1987-01-16 1988-07-22 Hitachi Ltd Access driving mechanism

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63178755A (en) * 1987-01-16 1988-07-22 Hitachi Ltd Access driving mechanism

Also Published As

Publication number Publication date
JP2557404B2 (en) 1996-11-27

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