JPH0242215U

JPH0242215U -

Info

Publication number: JPH0242215U
Application number: JP12135288U
Authority: JP
Priority date: 1988-09-14
Filing date: 1988-09-14
Publication date: 1990-03-23

Description

[Brief explanation of drawings]

第１図は本考案の第一実施例に係る光ピツクア
ツプの補正駆動装置を示す平面図、第２図は第１
図の斜視図である。第３図はシヤフトがスリーブ
に片寄せされた状態を示す断面図、第４図は本考
案のフオーカシング補正時における電圧とレンズ
ホルダの位置変位量の関係を示すグラフ、第５Ａ
図は本考案の第二実施例に係る光ピツクアツプの
補正駆動装置の平面図、第５Ｂ図はその側面図、
第６図は本考案の第三実施例に係る光ピツクアツ
プの補正駆動装置の平面図、第７図は従来の光ピ
ツクアツプの補正駆動時におけるシヤフトとスリ
ーブとの位置関係を示す断面図、第８図は従来の
フオーカシング補正時における電圧とレンズホル
ダの位置変位量との関係を示すグラフである。５……レンズホルダ、７……対物レンズ、８…
…スリーブ、９……シヤフト、１３ａ，１３ｂ，
２２ａ，２２ｂ……マグネツト、１４……ヨーク
、２０……バランサ、２１……ゴムばね。 FIG. 1 is a plan view showing a correction drive device for an optical pickup according to a first embodiment of the present invention, and FIG.
FIG. Fig. 3 is a cross-sectional view showing a state in which the shaft is biased toward the sleeve, Fig. 4 is a graph showing the relationship between the voltage and the amount of positional displacement of the lens holder during focusing correction of the present invention, and Fig. 5A
The figure is a plan view of a correction drive device for an optical pickup according to a second embodiment of the present invention, and FIG. 5B is a side view thereof.
6 is a plan view of a correction drive device for an optical pickup according to a third embodiment of the present invention; FIG. 7 is a sectional view showing the positional relationship between the shaft and the sleeve during correction drive of a conventional optical pickup; FIG. The figure is a graph showing the relationship between the voltage and the amount of positional displacement of the lens holder during conventional focusing correction. 5...Lens holder, 7...Objective lens, 8...
...Sleeve, 9...Shaft, 13a, 13b,
22a, 22b... magnet, 14... yoke, 20... balancer, 21... rubber spring.

Claims

[Claims for Utility Model Registration] 1. A direction in which the optical axis of the objective lens traverses the information track of the optical disk by rotational movement when an objective lens facing the optical disk is mounted and the sleeve is inserted through the shaft. An optical pickup is provided with a lens holder that is driven for correction in the direction of the lens, a coil for correction drive is provided on the lens holder, and a fixed part is provided with a magnet that forms a magnetic field in a direction that crosses the coil. In the correction drive device, a balancer containing a ferromagnetic material such as iron is provided in the lens holder in a magnetic field forming area by the magnet, and the sleeve is biased toward the shaft by the magnetic field passing through the balancer. What is claimed is: 1. A correction drive device for an optical pickup, characterized in that the correction drive of the optical pickup is performed in a state in which 2. A lens holder is provided with an objective lens facing the optical disk and whose sleeve is inserted through the shaft, and the optical axis of the objective lens is corrected and driven in a direction to cross the information track of the optical disk by rotational operation. In a correction drive device for an optical pickup, the lens holder is provided with a correction drive coil, and a fixed part is provided with a magnet that forms a magnetic field in a direction across the coil. The lens holder is biased in a direction perpendicular to the shaft by an elastic member supporting the lens holder, and this biasing force drives the optical pickup in a state where the sleeve is biased toward the shaft. A correction drive device for an optical pickup, characterized in that: 3. A lens holder, in which an objective lens facing the optical disk is mounted and a sleeve is inserted through the shaft, is driven by rotation to correct the optical axis of the objective lens in a direction that crosses an information track of the optical disk. In the correction drive device for an optical pickup, the lens holder is provided with a correction drive coil, and the fixed part is provided with a magnet that forms a magnetic field in a direction transverse to the coil. A pair of sleeves are provided, each of which is disposed at a position offset relative to the shaft, and the coil is attracted by the biased magnet, and this attraction force causes the sleeve to be biased toward the shaft when the optical pick-up is mounted. 1. A correction drive device for an optical pickup, characterized in that a correction drive is performed.