JPS61195526U

JPS61195526U -

Info

Publication number: JPS61195526U
Application number: JP7907185U
Authority: JP
Priority date: 1985-05-27
Filing date: 1985-05-27
Publication date: 1986-12-05
Also published as: JPH0450567Y2

Description

[Brief explanation of the drawing]

第１図はこの考案の光学手段駆動装置に適用す
る可動ホルダの一実施例を示す平面図、第２図は
その一部を切欠いた斜視図、第３図は従来の光学
手段駆動装置の平面図、第４図はその縦断正面図
、第５図は分解斜視図である。１は光学手段（対物レンズ）、２は可動ホルダ
、２ａはリング部、２ｂは平板部、２ｃは補強板
部、３は軸、４は軸受け、５は焦点制御用コイル
、６ａ〜６ｄはトラツキング制御用コイル、７ａ
，７ｂ，８ａ，８ｂ，１０ａ，１０ｂは磁路形成
体（永久磁石、外側ヨーク、内側ヨーク）。なお
、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 an embodiment of a movable holder applied to the optical means driving device of this invention, Fig. 2 is a partially cutaway perspective view of the movable holder, and Fig. 3 is a plan view of a conventional optical means driving device. 4 is a longitudinal sectional front view thereof, and FIG. 5 is an exploded perspective view thereof. 1 is an optical means (objective lens), 2 is a movable holder, 2a is a ring part, 2b is a flat plate part, 2c is a reinforcing plate part, 3 is a shaft, 4 is a bearing, 5 is a focus control coil, 6a to 6d are tracking Control coil, 7a
, 7b, 8a, 8b, 10a, and 10b are magnetic path forming bodies (permanent magnet, outer yoke, inner yoke). In addition, in the figures, the same reference numerals indicate the same or equivalent parts.

Claims

[Scope of utility model registration request]

A movable holder rotatably supported on a spindle provided at the center of a magnetic path forming body including a magnet and slidably in the axial direction of the spindle, and an optical axis substantially parallel to the spindle. An optical means is attached to the movable holder eccentrically from the support shaft, and a detection signal of the defocus of the light spot irradiated from the optical means onto the information surface of the disk and the track deviation of the light spot with respect to the track of the disk is detected. In an optical means driving device having a focus control coil and a tracking control coil provided on the movable holder so as to generate a driving force for the movable holder, the focus control coil and the tracking control coil are held. The movable holder is constituted by a ring portion, a flat plate portion extending across the center of the ring portion and holding the bearing and optical means, and a reinforcing plate portion provided orthogonally to the flat plate portion. Features: Optical means drive device.