JPS6424525U

JPS6424525U -

Info

Publication number: JPS6424525U
Application number: JP11928187U
Authority: JP
Priority date: 1987-08-05
Filing date: 1987-08-05
Publication date: 1989-02-09

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例のカバーを透視し
て示す平面図、第２図は第１図の−線に沿つ
た平面での断面図、第３図は第１図の−線に
沿つた平面での断面図、第４図は従来の光デイス
ク装置の対物レンズ駆動装置のカバーを透視して
示す平面図、第５図および第６図はそれぞれ第４
図の−線および−線に沿つた平面での断
面図である。１・・本体フレーム、３・・支持軸、４・・対
物レンズ、１２・・対物レンズ保持部材、１２ａ
・・穴、１３・・フオーカス方向制御用コイル、
１４・・トラツキング方向制御用コイル、１５・
・フオーカス方向制御用永久磁石、１６ａ，１６
ｂ・・フオーカス方向制御用ヨーク、１７・・ト
ラツキング方向制御用永久磁石、１８・・トラツ
キング方向制御用ヨーク。なお、各図中、同一符
号は同一又は相当部分を示す。 Fig. 1 is a plan view showing a cover of an embodiment of the invention, Fig. 2 is a sectional view taken along the - line in Fig. 1, and Fig. 3 is a plan view taken along the - line in Fig. 1. FIG. 4 is a plan view showing the cover of the objective lens driving device of a conventional optical disk device as seen through, and FIGS.
FIG. 3 is a sectional view taken along the - line and - line in the figure. 1. Main body frame, 3. Support shaft, 4. Objective lens, 12. Objective lens holding member, 12a
... Hole, 13... Focus direction control coil,
14. Tracking direction control coil, 15.
・Permanent magnet for focus direction control, 16a, 16
b... Yoke for focus direction control, 17... Permanent magnet for tracking direction control, 18... Yoke for tracking direction control. In each figure, the same reference numerals indicate the same or equivalent parts.

Claims

[Claims for Utility Model Registration] (1) An objective lens that forms a light spot on the disk, a support shaft fixed to the main body frame, and an object that is slidable in the axial direction of the support shaft and around the support shaft. an objective lens holding member that is rotatably provided and supports the objective lens so that its optical axis is parallel to the support axis; and the objective lens is driven in a focus direction via the objective lens holding member. A focusing direction drive mechanism consisting of a focus direction control coil, a focus direction control magnet, and a yoke for driving in the tracking direction, and a tracking direction drive mechanism consisting of a tracking direction control coil, a tracking direction control magnet, and a yoke for driving in the tracking direction. An objective lens drive device for an optical disk device comprising: the ring-shaped focus direction drive mechanism; and the tracking direction drive mechanism disposed inside the ring-shaped focus direction drive mechanism. Device. (2) An objective lens drive device for an optical disk device according to claim 1, which is a utility model and includes an objective lens holding member provided with a hole for arranging a tracking direction drive mechanism.