JPH0211519U

JPH0211519U -

Info

Publication number: JPH0211519U
Application number: JP8601188U
Authority: JP
Priority date: 1988-06-28
Filing date: 1988-06-28
Publication date: 1990-01-24

Description

[Brief explanation of drawings]

第１図〜第４図はそれぞれ本考案の第１〜第４
の実施例の斜視図、第５図は従来のレンズアクチ
ユエータの一例の斜視図である。１……集光レンズ、２……保持体、３ａ〜３ｄ
……ワイヤばね、４……固定部、５……フオーカ
スコイル、６……トラツキングコイル、７ａ，７
ｂ……永久磁石、８ａ〜８ｄ……ヨーク、９ａ〜
９ｆ……梁。 Figures 1 to 4 are the first to fourth figures of the present invention, respectively.
FIG. 5 is a perspective view of an example of a conventional lens actuator. 1... Condenser lens, 2... Holder, 3a to 3d
... Wire spring, 4 ... Fixed part, 5 ... Focus coil, 6 ... Tracking coil, 7a, 7
b...Permanent magnet, 8a-8d...Yoke, 9a-
9f...Beam.

Claims

[Claims for Utility Model Registration] (1) A condensing lens that condenses laser light onto the surface of an information recording medium, a holder that holds this condensing lens, and a focus direction that is parallel to the optical axis of this holder. and a support member made of a plurality of wire springs that supports the support member so as to be movable in two axes, that is, a tracking direction perpendicular to the optical axis, and a focuser that is fixed to the holder and drives the condenser lens in the focus direction. In the lens actuator, the lens actuator includes a tracking coil that is driven in a tracking direction, and a pair of permanent magnets that are arranged opposite to each other to sandwich the focus coil and the tracking coil to form a magnetic circuit. A lens actuator comprising a beam fixed between the wire springs of each member in a diagonal direction of the wire springs. (2) A condensing lens that condenses the laser beam onto the surface of the information recording medium, a holder that holds this condensing lens, and a focusing direction that is parallel to the optical axis and a tracking direction that is perpendicular to the optical axis. a support member consisting of a plurality of wire springs supported so as to be movable in two axes; a focus coil fixed to the holder for driving the condensing lens in the focusing direction; and a truck for driving the condensing lens in the tracking direction. In the lens actuator, the lens actuator includes a King coil, and a pair of permanent magnets that are arranged opposite to each other with the focus coil and the tracking coil in between to form a magnetic circuit, wherein each of the wire springs of the support member A lens actuator comprising: a beam fixed in the diagonal direction of the wire spring between the wire springs; and a beam fixed parallel to the focus direction between the wire springs. (3) A condensing lens that condenses the laser beam onto the surface of the information recording medium, a holder that holds this condensing lens, and a focusing direction that is parallel to the optical axis and a tracking direction that is perpendicular to the optical axis. a support member consisting of a plurality of wire springs supported so as to be movable in two axes; a focus coil fixed to the holder for driving the condensing lens in the focusing direction; and a truck for driving the condensing lens in the tracking direction. In the lens actuator, the lens actuator includes a King coil, and a pair of permanent magnets that are arranged opposite to each other with the focus coil and the tracking coil in between to form a magnetic circuit, wherein each of the wire springs of the support member A lens actuator comprising: a beam fixed in the diagonal direction of the wire spring; and a beam fixed parallel to the tracking direction between the wire springs. (4) A condensing lens that condenses the laser beam onto the surface of the information recording medium, a holder that holds this condensing lens, and a focusing direction that is parallel to the optical axis and a tracking direction that is perpendicular to the optical axis. a support member consisting of a plurality of wire springs supported so as to be movable in two axes; a focus coil fixed to the holder for driving the condensing lens in the focusing direction; and a truck for driving the condensing lens in the tracking direction. In the lens actuator, the lens actuator includes a King coil, and a pair of permanent magnets that are arranged opposite to each other with the focus coil and the tracking coil in between to form a magnetic circuit, wherein each of the wire springs of the support member A lens actuator comprising: a beam fixed in the diagonal direction of the wire spring; and a beam fixed parallel to the focusing direction and the tracking direction, respectively, between the wire springs.