JPS57100602A - Pickup arm device - Google Patents

Pickup arm device

Info

Publication number
JPS57100602A
JPS57100602A JP17581580A JP17581580A JPS57100602A JP S57100602 A JPS57100602 A JP S57100602A JP 17581580 A JP17581580 A JP 17581580A JP 17581580 A JP17581580 A JP 17581580A JP S57100602 A JPS57100602 A JP S57100602A
Authority
JP
Japan
Prior art keywords
coil
pickup arm
driving means
magnet
electromagnetic driving
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
JP17581580A
Other languages
Japanese (ja)
Inventor
Masayuki Inoue
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 JP17581580A priority Critical patent/JPS57100602A/en
Publication of JPS57100602A publication Critical patent/JPS57100602A/en
Pending legal-status Critical Current

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Abstract

PURPOSE: To reduce the size of an electromagnetic driving means consisting of a coil and magnet for driving a pickup arm, by providing a magnetic fluid in a magnetic gap wherein the coil of the electromagnetic driving means is arranged.
CONSTITUTION: An electromagnetic driving means which drives a pickup arm 1 constitutes a linear motor by a magnet 9 stuck to a field part 10 fitted to a housing 18 and a coil 11 wound around a bobbin 15. A magnetic fluid 14 is provided in a magnetic gap between the magnet 9 and coil 11 to reduce the temperature rise of the coil 11 and also to further increase the damping of the linear motor to the pickup arm 1 by the electromagnetic fluid. Thus, the constitution of the electromagnetic driving means is reduced in size.
COPYRIGHT: (C)1982,JPO&Japio
JP17581580A 1980-12-15 1980-12-15 Pickup arm device Pending JPS57100602A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17581580A JPS57100602A (en) 1980-12-15 1980-12-15 Pickup arm device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17581580A JPS57100602A (en) 1980-12-15 1980-12-15 Pickup arm device

Publications (1)

Publication Number Publication Date
JPS57100602A true JPS57100602A (en) 1982-06-22

Family

ID=16002707

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17581580A Pending JPS57100602A (en) 1980-12-15 1980-12-15 Pickup arm device

Country Status (1)

Country Link
JP (1) JPS57100602A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10154383A (en) * 1996-11-21 1998-06-09 Olympus Optical Co Ltd Optical system driving device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10154383A (en) * 1996-11-21 1998-06-09 Olympus Optical Co Ltd Optical system driving device

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