JPS591131U - Focus control device for optical recording media - Google Patents

Focus control device for optical recording media

Info

Publication number
JPS591131U
JPS591131U JP9480282U JP9480282U JPS591131U JP S591131 U JPS591131 U JP S591131U JP 9480282 U JP9480282 U JP 9480282U JP 9480282 U JP9480282 U JP 9480282U JP S591131 U JPS591131 U JP S591131U
Authority
JP
Japan
Prior art keywords
control device
focus control
optical recording
recording media
objective lens
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
JP9480282U
Other languages
Japanese (ja)
Other versions
JPS6245302Y2 (en
Inventor
太一 秋葉
Original Assignee
パイオニアビデオ株式会社
パイオニア株式会社
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 パイオニアビデオ株式会社, パイオニア株式会社 filed Critical パイオニアビデオ株式会社
Priority to JP9480282U priority Critical patent/JPS591131U/en
Publication of JPS591131U publication Critical patent/JPS591131U/en
Application granted granted Critical
Publication of JPS6245302Y2 publication Critical patent/JPS6245302Y2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Optical Head (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図は従来例のフォーカス制御装置を示す縦断面図、
第２図は本考案に係るフォーカス制御装置の一実施例を
示す縦断面図で、第３図は同装置の他の実施例を示す縦
断面図、第４図は同装置の更に他の実施例を示す要部の
縦断面図である。 １・・・磁気回路、１ａ・・・磁気ギャップ、５・・・
対物レンズ、７・・・コイル、９・・・レンズキャップ
、１０　　　　゛・・・磁性体又は永久磁石。FIG. 1 is a longitudinal sectional view showing a conventional focus control device;
FIG. 2 is a longitudinal sectional view showing one embodiment of the focus control device according to the present invention, FIG. 3 is a longitudinal sectional view showing another embodiment of the same device, and FIG. 4 is a longitudinal sectional view showing another embodiment of the same device. FIG. 3 is a vertical cross-sectional view of a main part showing an example. 1... Magnetic circuit, 1a... Magnetic gap, 5...
Objective lens, 7... Coil, 9... Lens cap, 10... Magnetic material or permanent magnet.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 円盤状記録媒体の記録トラックに光源の光ビームを集光
させるための対物レンズと、該光ビームが記録トラック
を追従するよう対物レンズを上下に変位させる磁気回路
及びコイルと、対物レンズを保護するレンズキャップと
を備え、該レンズキャップの少くとも一部には磁気回路
の漏洩磁束との間に吸引力を生ずる磁性体又は永久磁石
を設けたことを特徴とする光学式記録媒体のフォーカス
制御装置。An objective lens for focusing a light beam from a light source on a recording track of a disk-shaped recording medium, a magnetic circuit and a coil for vertically displacing the objective lens so that the light beam follows the recording track, and protecting the objective lens. A focus control device for an optical recording medium, comprising a lens cap, and at least a part of the lens cap is provided with a magnetic material or a permanent magnet that generates an attractive force with the leakage magnetic flux of a magnetic circuit. .
JP9480282U 1982-06-24 1982-06-24 Focus control device for optical recording media Granted JPS591131U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9480282U JPS591131U (en) 1982-06-24 1982-06-24 Focus control device for optical recording media

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9480282U JPS591131U (en) 1982-06-24 1982-06-24 Focus control device for optical recording media

Publications (2)

Publication Number Publication Date
JPS591131U true JPS591131U (en) 1984-01-06
JPS6245302Y2 JPS6245302Y2 (en) 1987-12-03

Family

ID=30226724

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9480282U Granted JPS591131U (en) 1982-06-24 1982-06-24 Focus control device for optical recording media

Country Status (1)

Country Link
JP (1) JPS591131U (en)

Also Published As

Publication number Publication date
JPS6245302Y2 (en) 1987-12-03

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