JPH01165920U

JPH01165920U -

Info

Publication number: JPH01165920U
Application number: JP6302388U
Authority: JP
Priority date: 1988-05-12
Filing date: 1988-05-12
Publication date: 1989-11-21

Description

[Brief explanation of the drawing]

第１図〜第５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図はその側面図、第３図は回動
部材の軸と各部材の重量モーメントとの関係を示
す説明図、第４図はトラツキング補正駆動力の作
用方向を示す平面図、第５図は想定される副共振
の方向とトラツキング補正駆動力との関係を示す
平面図、第６図は従来の光ピツクアツプの補正駆
動装置を示す斜視図、第７図は従来の補正駆動装
置における副共振の発生状態を示す平面図である
。１１……対物レンズ、１２……レンズホルダ、
１３……回動部材、１４……板ばね、１５……回
動部材の軸、１７……マグネツト、１８……フオ
ーカシングコイル、１９……トラツキングコイル
。 1 to 5 show an embodiment of the present invention, in which FIG. 1 is a plan view showing a correction drive device for an optical pickup, FIG. 2 is a side view thereof, and FIG. 3 is a rotational member. An explanatory diagram showing the relationship between the shaft and the weight moment of each member, Figure 4 is a plan view showing the direction of action of the tracking correction driving force, and Figure 5 is the relationship between the assumed sub-resonance direction and the tracking correction driving force. 6 is a perspective view showing a conventional correction drive device for an optical pickup, and FIG. 7 is a plan view showing a state in which sub-resonance occurs in the conventional correction drive device. 11...Objective lens, 12...Lens holder,
13... Rotating member, 14... Leaf spring, 15... Axis of rotating member, 17... Magnet, 18... Focusing coil, 19... Tracking coil.

Claims

[Claims for Utility Model Registration] 1. An objective lens for condensing a detection beam onto an optical disk is held in a lens holder, and the space between the lens holder and the rotating member is on a virtual plane perpendicular to the optical axis of the objective lens. The lens holder is connected by a leaf spring arranged in a V-shape, and is supported so that the lens holder can perform a correction operation in the optical axis direction of the objective lens by deformation of the leaf spring. The lens is supported so as to be able to rotate about an axis parallel to the optical axis of the lens, and this axis is located at a position where the moment due to the load on the lens holder side and the moment due to the load on the rotating member side are balanced. Pick-up correction drive device. 2 A driving force is applied to the lens holder in a direction parallel to the line connecting the optical axis of the objective lens and the axis of the rotating member, and part of this driving force acts as a rotational force around the axis of the rotating member. 2. A correction drive device for an optical pickup according to claim 1, further comprising a tracking correction mechanism that rotates the objective lens in a tracking correction direction by a component force of the optical pickup.