JPS6347417U

JPS6347417U -

Info

Publication number: JPS6347417U
Application number: JP14215986U
Authority: JP
Priority date: 1986-09-17
Filing date: 1986-09-17
Publication date: 1988-03-31

Description

[Brief explanation of the drawing]

第１図〜第３図はこの考案に係る光ピツクアツ
プの対物レンズ駆動装置の一実施例を示したもの
であり、第１図は斜視図、第２図は断面図、第３
図は分解斜視図である。第４図〜第６図は従来の
対物レンズ駆動装置を示したものであり、第４図
は光ピツクアツプと光デイスクとの位置関係を示
す説明図、第５図は斜視図、第６図は断面図であ
る。Ｂ……光ピツクアツプ、Ｄ……光デイスク、ｔ
……接線方向、ｎ……法線方向、１０……光ピツ
クアツプ本体、１１……反射板、２１……対物レ
ンズ、３０……対物レンズ駆動装置、３１……支
持ベース、３１ａ……固定部、３１ｂ……貫通孔
、３１ｃ……溝部、３２……ホルダー、３３……
弾性線材、３３ａ……固定端、３３ｂ……自由端
、３６，３７，３８，３９……磁気回路。 1 to 3 show an embodiment of an objective lens driving device for an optical pickup according to this invention, in which FIG. 1 is a perspective view, FIG. 2 is a sectional view, and FIG.
The figure is an exploded perspective view. 4 to 6 show a conventional objective lens driving device, FIG. 4 is an explanatory diagram showing the positional relationship between the optical pickup and the optical disk, FIG. 5 is a perspective view, and FIG. FIG. B... Optical pickup, D... Optical disk, t
...Tangential direction, n...Normal direction, 10... Optical pickup main body, 11... Reflection plate, 21... Objective lens, 30... Objective lens driving device, 31... Support base, 31a... Fixing part , 31b... through hole, 31c... groove, 32... holder, 33...
Elastic wire, 33a...fixed end, 33b...free end, 36, 37, 38, 39...magnetic circuit.

Claims

[Claims for Utility Model Registration] A support base that is attached to an optical pickup main body and is joined to the optical pickup main body, which is equipped with a reflector that reflects a light beam in the tangential direction of the optical disk in the normal direction of the optical disk; a holder for holding an objective lens for forming an image of a light beam incident in the normal direction on the optical disk; In an objective lens drive device for an optical pickup, the objective lens drive device includes four or more elastic wires that are fixed to a fixed part provided at one end of a support base and whose free ends are fixed to the holder, and a magnetic circuit for driving the holder. , the magnetic circuit is provided only on the opposite side of the fixed part with the objective lens in between, a through hole is bored in the support base to allow the reflection plate to penetrate directly below the objective lens, and the tangent line is formed in the fixed part. 1. An objective lens driving device for an optical pickup, characterized in that a groove is formed so as to communicate with the through hole and serve as an optical path for a beam of light emitted in a direction and incident on the reflecting plate.