JPS6257924U

JPS6257924U -

Info

Publication number: JPS6257924U
Application number: JP14666185U
Authority: JP
Priority date: 1985-09-27
Filing date: 1985-09-27
Publication date: 1987-04-10

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例を示す要部斜視図、
第２図は第１図の可動部を示す断面図、第３図は
第１図におけるガイド溝と突起部との合わせを示
す説明図、第４図は従来技術の説明図である。１２ａ，１２ｂ……磁気回路、１３ａ，１３ｂ
……磁石、１４ａ，１４ｂ，１５ａ，１５ｂ……
ヨーク部材、１７……対物レンズホルダ、１８…
…フオーカス制御コイル、１９ａ，１９ｂ……ト
ラツク制御コイル、２０……対物レンズ、２２…
…ミラー、２６ａ，２６ｂ……ガイド溝、２７…
…ミラーホルダ、２７ａ，２７ｂ……突起部、２
８……窓。 FIG. 1 is a perspective view of essential parts showing an embodiment of the present invention;
FIG. 2 is a sectional view showing the movable part in FIG. 1, FIG. 3 is an explanatory view showing the alignment of the guide groove and the protrusion in FIG. 1, and FIG. 4 is an explanatory view of the prior art. 12a, 12b...magnetic circuit, 13a, 13b
...Magnet, 14a, 14b, 15a, 15b...
Yoke member, 17...Objective lens holder, 18...
...Focus control coil, 19a, 19b...Track control coil, 20...Objective lens, 22...
...Mirror, 26a, 26b...Guide groove, 27...
...Mirror holder, 27a, 27b...Protrusion, 2
8...window.

Claims

[Claims for Utility Model Registration] In an optical head of an optical disk device that reproduces or records information on an optical disk, there is provided a fixed light source, and an optical path of a light beam from the light source and a reflected light from the optical disk. a first holder equipped with an optical path changing means for changing the optical path and having a protrusion; and a first holder that is engaged with the first holder so as to be slidable in a direction substantially perpendicular to the surface of the optical disk. a second holder mounted with an objective lens disposed between the optical disk and the optical path converting means; and a second holder fixedly disposed in the radial direction of the optical disk, the second holder comprising a magnet and a yoke member. a magnetic circuit member having a magnetic gap between the magnet and the yoke member; the magnetic circuit member being attached to the second holder, the magnetic circuit member being disposed so as to penetrate through the magnetic gap of the magnetic circuit member, and having a magnetic gap in the magnetic gap; A first coil and a second coil are provided at a predetermined angle to each other, and a guide groove is provided in the yoke member so that the second holder can slide in the radial direction of the optical disc. An optical head characterized in that a protrusion of the second holder is held by the guide groove.