JPS5613502A - Linear tracking arm unit - Google Patents

Linear tracking arm unit

Info

Publication number
JPS5613502A
JPS5613502A JP8858979A JP8858979A JPS5613502A JP S5613502 A JPS5613502 A JP S5613502A JP 8858979 A JP8858979 A JP 8858979A JP 8858979 A JP8858979 A JP 8858979A JP S5613502 A JPS5613502 A JP S5613502A
Authority
JP
Japan
Prior art keywords
base
controlled
slit
pickup arm
improve
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
JP8858979A
Other languages
Japanese (ja)
Inventor
Makoto Akiyama
Kazuyuki Nakamura
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 JP8858979A priority Critical patent/JPS5613502A/en
Publication of JPS5613502A publication Critical patent/JPS5613502A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To improve an SN ratio in record reproduction by cutting off tranfer of external vibrator by floating a pickup arm base through an electromagnetic coil driven and controlled in accordance with movement from a reference position.
CONSTITUTION: Arm base 1 having a fixed pickup arm moves vertically through driving coil 12a between permanent magnets 10 and 11. Then, its movement position is detected through light source 14a and CdS photodetector 13a provided to base 1 on the basis of slit 15a provided to a fixed position of slit plate 15 and electric power supplied to coil 12a is controlled by a differential voltage that corresponds to the detected position, so that the base will automatically be controlled and positioned at the reference position determined by slit 15a. Base 1, therefore, floats vertically and is also placed in a float state in terms of two other directions perpendicular to the vertical directon to cut off transfer of external vibration, caused by a motor, etc., to base 1, so that S/N in record reproduction by the pickup arm by the ecxternal vibration will improve.
COPYRIGHT: (C)1981,JPO&Japio
JP8858979A 1979-07-11 1979-07-11 Linear tracking arm unit Pending JPS5613502A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8858979A JPS5613502A (en) 1979-07-11 1979-07-11 Linear tracking arm unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8858979A JPS5613502A (en) 1979-07-11 1979-07-11 Linear tracking arm unit

Publications (1)

Publication Number Publication Date
JPS5613502A true JPS5613502A (en) 1981-02-09

Family

ID=13947011

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8858979A Pending JPS5613502A (en) 1979-07-11 1979-07-11 Linear tracking arm unit

Country Status (1)

Country Link
JP (1) JPS5613502A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5811039A (en) * 1981-07-13 1983-01-21 Nippon Soda Co Ltd Adsorbent having giant heterocyclic structure
US4476007A (en) * 1983-05-20 1984-10-09 Eastman Kodak Company Hemispherands and sodium-selective compositions and electrodes containing same
US4505800A (en) * 1983-05-20 1985-03-19 Eastman Kodak Company Sodium-selective compositions and electrodes containing same
US4933070A (en) * 1981-12-21 1990-06-12 Eastman Kodak Company Hemispherands in ion-selective compositions

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5811039A (en) * 1981-07-13 1983-01-21 Nippon Soda Co Ltd Adsorbent having giant heterocyclic structure
JPH0218135B2 (en) * 1981-07-13 1990-04-24 Nippon Soda Co
US4933070A (en) * 1981-12-21 1990-06-12 Eastman Kodak Company Hemispherands in ion-selective compositions
US4476007A (en) * 1983-05-20 1984-10-09 Eastman Kodak Company Hemispherands and sodium-selective compositions and electrodes containing same
US4505800A (en) * 1983-05-20 1985-03-19 Eastman Kodak Company Sodium-selective compositions and electrodes containing same

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