JPS6352120U

JPS6352120U -

Info

Publication number: JPS6352120U
Application number: JP14626586U
Authority: JP
Priority date: 1986-09-22
Filing date: 1986-09-22
Publication date: 1988-04-08

Description

[Brief explanation of drawings]

第１図は本考案の第一実施例による光学式ピツ
クアツプの補正駆動装置を示す平面図、第２図は
第１図の側面図、第３図は第２図のフオーカシン
グコイルを拡大して示す拡大図、第４図は第３図
の左側面図、第５図はトラツキングコイルを示す
第２図の左側面図、第６図は第一実施例のフオー
カシングコイルを示す斜視図、第７図は第二実施
例によるフオーカシングコイルを示す斜視図、第
８図は第二実施例によるフオーカシングコイルと
マグネツトを示す側面図、第９図は第三実施例に
よるフオーカシングコイルを示す斜視図、第１０
図は第三実施例によるフオーカシングコイルとマ
グネツトを示す側面図、第１１図は第四実施例に
よるフオーカシングコイルを示す斜視図、第１２
図は第四実施例のフオーカシングコイルとマグネ
ツトを示す側面図、第１３図は従来の光学式ピツ
クアツプの補正駆動装置を示す平面図、第１４図
はその側面図である。１……対物レンズ、２……レンズホルダ、８…
…トラツキングコイル、１０，２０，３０，４０
……フオーカシングコイル、１０ａ，１０ｂ，２
０ａ，２０ｂ，３０ａ，３０ｂ，４０ａ，４０ｂ
……フオーカシングコイルの駆動部、Ｍａ，Ｍｂ
，Ｍｄ，Ｍｅ，Ｍｆ，Ｍｇ，Ｍｈ……フオーカシ
ングコイルに対向するマグネツト、Ｍｃ……トラ
ツキングコイルに対向するマグネツト。 Fig. 1 is a plan view showing a correction drive device for an optical pickup according to a first embodiment of the present invention, Fig. 2 is a side view of Fig. 1, and Fig. 3 is an enlarged view of the focusing coil shown in Fig. 2. 4 is a left side view of FIG. 3, FIG. 5 is a left side view of FIG. 2 showing the tracking coil, and FIG. 6 is a perspective view showing the focusing coil of the first embodiment. 7 is a perspective view showing a focusing coil according to a second embodiment, FIG. 8 is a side view showing a focusing coil and magnet according to a second embodiment, and FIG. 9 is a perspective view showing a focusing coil according to a third embodiment. Perspective view showing a cassing coil, No. 10
The drawings are a side view showing a focusing coil and a magnet according to a third embodiment, FIG. 11 is a perspective view showing a focusing coil according to a fourth embodiment, and FIG. 12 is a perspective view showing a focusing coil according to a fourth embodiment.
This figure is a side view showing the focusing coil and magnet of the fourth embodiment, FIG. 13 is a plan view showing a conventional correction drive device for an optical pickup, and FIG. 14 is a side view thereof. 1... Objective lens, 2... Lens holder, 8...
...Tracking coil, 10, 20, 30, 40
...Focusing coil, 10a, 10b, 2
0a, 20b, 30a, 30b, 40a, 40b
...Focusing coil drive unit, Ma, Mb
, Md, Me, Mf, Mg, Mh... Magnet facing the focusing coil, Mc... Magnet facing the tracking coil.

Claims

[Claims for Utility Model Registration] (1) Focusing correction direction in which the lens holder holding the objective lens facing the optical disk approaches and moves away from the optical disk, and tracking correction parallel to the recording surface of the optical disk. The lens holder is supported for fine movement in both directions, and a focusing coil for driving the objective lens in the focusing correction direction and a tracking coil for driving the objective lens in the tracking correction direction are fixedly installed on the lens holder. In the optical pickup correction drive device, the focusing coil is provided with a magnet that forms a magnetic field that crosses the focusing coil, and a magnet that forms a magnetic field that crosses the tracking coil. A magnet and an opposing yoke are arranged to protrude from the side surface in the direction of tracking correction operation, and to face each other across two driving parts of the focusing coil through which current flows in the direction of tracking correction operation. An optical pickup correction drive device characterized by the following. (2) The focusing coil is formed by winding a rectangular frame and then bending it into a U-shape, and a pair of opposing sides serve as driving parts. A correction drive device for an optical pickup according to scope 1. (3) The optical pickup according to claim 1, wherein the focusing coil has a square shape and is wound flat, and a pair of opposing sides serve as driving parts. Correction drive. (4) The correction drive device for an optical pickup according to claim 1, wherein the focusing coil is wound into a rectangular tube shape, and two opposing surfaces serve as drive parts.