JPS57154674A - Tone arm device - Google Patents

Tone arm device

Info

Publication number
JPS57154674A
JPS57154674A JP4000781A JP4000781A JPS57154674A JP S57154674 A JPS57154674 A JP S57154674A JP 4000781 A JP4000781 A JP 4000781A JP 4000781 A JP4000781 A JP 4000781A JP S57154674 A JPS57154674 A JP S57154674A
Authority
JP
Japan
Prior art keywords
horizontal
vertical
coil
yoke
opposed
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
JP4000781A
Other languages
Japanese (ja)
Inventor
Hiroshi Yasuda
Shuji Sakamoto
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP4000781A priority Critical patent/JPS57154674A/en
Publication of JPS57154674A publication Critical patent/JPS57154674A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To simplify the structure, by constituting a vertical driving source and a horizontal driving source so that a vertical driving coil and a magnet are opposed in a vertical yoke, and a horizontal yoke provided on the arm base, a horizontal coil and a horizontal magnet are opposed, respectively.
CONSTITUTION: A tone arm body 1 is supported by an arm base 3 so as to be freely rotatable vertically and horizontally, through a bearing 23, a ring-like member 2a and a bearing 24. The upper end of a lift shaft 4 is fixed to the arm body 1, and to its lower end, a vertical drviving coil 5 is stuck. The coil 5 is opposed to vertical magnets 7, 8 and forms a magnetic path together with a vertical yoke 9. A yoke 6 provided on the end of the arm base 3, a yoke 14 provided on a horizontal coil holder 12, a horizontal coil 13 and a magnet 11 form a horizontal magnetic path. Exact positioning and exact operation control are executed by detecting and controlling the vertical displacement and the horizontal displacement by a photointerrupter 18, and by forming an optical potentiometer by photodetecting and light emitting elements 19, 20, respectively.
COPYRIGHT: (C)1982,JPO&Japio
JP4000781A 1981-03-18 1981-03-18 Tone arm device Pending JPS57154674A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4000781A JPS57154674A (en) 1981-03-18 1981-03-18 Tone arm device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4000781A JPS57154674A (en) 1981-03-18 1981-03-18 Tone arm device

Publications (1)

Publication Number Publication Date
JPS57154674A true JPS57154674A (en) 1982-09-24

Family

ID=12568846

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4000781A Pending JPS57154674A (en) 1981-03-18 1981-03-18 Tone arm device

Country Status (1)

Country Link
JP (1) JPS57154674A (en)

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