JPH01162111U

JPH01162111U -

Info

Publication number: JPH01162111U
Application number: JP5719688U
Authority: JP
Priority date: 1988-04-26
Filing date: 1988-04-26
Publication date: 1989-11-10

Description

[Brief explanation of drawings]

第１図〜第３図は本考案の実施例を示すもので
あり、第１図は光ピツクアツプの補正駆動装置を
示す平面図、第２図はマグネツトとヨークを示す
分解斜視図、第３図はマグネツトとトラツキング
コイルとの対向部分を示す第１図の部分拡大平面
図、第４図は従来の光ピツクアツプを示す分解斜
視図、第５図は従来の光ピツクアツプの補正駆動
装置を示す平面図、第６図はその側面図、第７図
は補正駆動装置における高次共振特性を示す線図
である。５……レンズホルダ、７……対物レンズ、９…
…シヤフト、１１……フオーカシングコイル、１
２……トラツキングコイル、１２ａ……駆動作用
部、１３……マグネツト、１３ａ……外周面、１
３ｂ……内周面、１３ｃ……平面部、２４……ヨ
ーク、２４ａ……曲面支持部、２４ｂ……平面支
持部。 1 to 3 show an embodiment of the present invention. FIG. 1 is a plan view showing a correction drive device for an optical pickup, FIG. 2 is an exploded perspective view showing a magnet and a yoke, and FIG. 4 is an exploded perspective view of a conventional optical pickup, and FIG. 5 is a plan view of a correction drive device of a conventional optical pickup. 6 is a side view thereof, and FIG. 7 is a diagram showing high-order resonance characteristics in the correction drive device. 5...Lens holder, 7...Objective lens, 9...
...Shaft, 11...Focusing coil, 1
2...Tracking coil, 12a...Driving action part, 13...Magnet, 13a...Outer peripheral surface, 1
3b...Inner circumferential surface, 13c...Plane portion, 24...Yoke, 24a...Curved surface support portion, 24b...Plane support portion.

Claims

[Scope of utility model registration request]

a lens holder, in which an objective lens facing the optical disk is mounted, and the optical axis of the objective lens is corrected and driven in a direction that crosses the information track of the optical disk by rotational movement; A tracking coil having a portion through which current flows in a direction parallel to the optical axis of the lens, a magnet inserted into a hole formed in the lens holder to face the tracking coil, and supporting this magnet. In the correction drive device for an optical pickup provided with a yoke, the magnet has an outer circumferential surface facing the tracking coil and an inner circumferential surface opposite to this which are curved surfaces convex in the direction of the tracking coil. At the same time, a flat part is formed at the edge of the inner circumferential surface of the yoke, and the curved support part to which the inner circumferential surface of the magnet is joined is joined to the flat part without any gap. What is claimed is: 1. A correction drive device for an optical pickup, characterized in that a flat support portion is formed.