JPS6121022U - optical head - Google Patents
optical headInfo
- Publication number
- JPS6121022U JPS6121022U JP10217684U JP10217684U JPS6121022U JP S6121022 U JPS6121022 U JP S6121022U JP 10217684 U JP10217684 U JP 10217684U JP 10217684 U JP10217684 U JP 10217684U JP S6121022 U JPS6121022 U JP S6121022U
- Authority
- JP
- Japan
- Prior art keywords
- yoke
- cylindrical magnet
- optical head
- cylindrical
- optical
- 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
Links
Landscapes
- 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
第１図は従来の光学ヘッドの断面図、第２図は本考案の
一実施例の磁気回路の構造斜視図、第３図は磁気回路の
磁束分布を説明するための磁気回路の断面図、第４図は
磁郎回路とコイルの配置を示す斜視図、第５図は本考案
の一実施例の光学ヘッドの断面図である。
図において、１は鏡筒、２は対物レンズ、３はコイルボ
ビン、４はコイル、５は磁石、６１，６２は継鉄、７は
板バネ、８は円筒状磁石、８１，８２・・・８ｎは高性
能磁石、９は第１の継鉄、１０は第２の継鉄、１１は円
筒コイルをそれぞれ示している。FIG. 1 is a sectional view of a conventional optical head, FIG. 2 is a structural perspective view of a magnetic circuit according to an embodiment of the present invention, and FIG. 3 is a sectional view of a magnetic circuit for explaining the magnetic flux distribution of the magnetic circuit. FIG. 4 is a perspective view showing the arrangement of a magnetic circuit and a coil, and FIG. 5 is a sectional view of an optical head according to an embodiment of the present invention. In the figure, 1 is a lens barrel, 2 is an objective lens, 3 is a coil bobbin, 4 is a coil, 5 is a magnet, 61, 62 is a yoke, 7 is a leaf spring, 8 is a cylindrical magnet, 81, 82...8n 9 indicates a high-performance magnet, 9 indicates a first yoke, 10 indicates a second yoke, and 11 indicates a cylindrical coil.
Claims (1)
ヘッドであって、半径方向に着磁された円筒状磁石を用
い、該円筒状磁石の下端に中心孔を有する第１の継鉄を
設け、更に該第１の継鉄と前記円筒状磁石との外周を結
合する第２の継鉄によって磁気回路を形成するとともに
、前記円筒状磁石の中心軸と、その光軸を共有する対物
レンズおよび該レンズと同心状に結合された円筒型コイ
ルを前記第２の継鉄上に固定点を有する板バネで支持し
、前記円筒型コイルの外周が前記円筒状磁石の内周に対
向する構造としたことを特徴とする光学ヘッド。An optical head for an optical disk device that controls the position of a light spot in the optical axis direction, using a cylindrical magnet magnetized in the radial direction, and a first yoke having a center hole at the lower end of the cylindrical magnet. an objective lens that forms a magnetic circuit by a second yoke that connects the first yoke and the outer periphery of the cylindrical magnet, and that shares the central axis of the cylindrical magnet and its optical axis; and a structure in which a cylindrical coil concentrically connected to the lens is supported by a leaf spring having a fixed point on the second yoke, and the outer periphery of the cylindrical coil faces the inner periphery of the cylindrical magnet. An optical head characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10217684U JPS6121022U (en) | 1984-07-05 | 1984-07-05 | optical head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10217684U JPS6121022U (en) | 1984-07-05 | 1984-07-05 | optical head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6121022U true JPS6121022U (en) | 1986-02-06 |
Family
ID=30661579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10217684U Pending JPS6121022U (en) | 1984-07-05 | 1984-07-05 | optical head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6121022U (en) |
-
1984
- 1984-07-05 JP JP10217684U patent/JPS6121022U/en active Pending
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