JPS6267319U

JPS6267319U -

Info

Publication number: JPS6267319U
Application number: JP15900985U
Authority: JP
Priority date: 1985-10-17
Filing date: 1985-10-17
Publication date: 1987-04-27

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例に係る対物レンズ
アクチユエータの構成を示す概略斜視図、第２図
及び第３図は夫々この考案の一実施例に係る対物
レンズアクチユエータの変位動作を説明するため
の概略平面図及び第２図における―矢視断面
図、第４図ａ及びｂは、夫々この考案の一実施例
に係る対物レンズアクチユエータを備えた光ヘツ
ドの移動位置を説明する説明図である。１６……（大径）記録媒体、１７……（小径）
記録媒体、１５……（光ヘツドの）ケーシング、
４……対物レンズ、５……偏平コイル、６……角
形コイル、７……円形コイル、８……ｕ字ゴム、
９……直状ゴム、１……ホルダ、１１……フオー
カス磁石、１０……フオーカスヨーク、１３……
ジツタ磁石、１２……ジツタヨーク、２……第１
ヨーク体、１４……ラジアル磁石、３……第２ヨ
ーク体（ラジアルヨーク）。 FIG. 1 is a schematic perspective view showing the configuration of an objective lens actuator according to an embodiment of this invention, and FIGS. 2 and 3 are respectively displacement operations of an objective lens actuator according to an embodiment of this invention. A schematic plan view, a sectional view taken along arrows in FIG. It is an explanatory diagram to explain. 16... (large diameter) recording medium, 17... (small diameter)
Recording medium, 15... (optical head) casing,
4... Objective lens, 5... Flat coil, 6... Square coil, 7... Circular coil, 8... U-shaped rubber,
9... Straight rubber, 1... Holder, 11... Focus magnet, 10... Focus yoke, 13...
Jitter magnet, 12... Jitter yoke, 2... 1st
Yoke body, 14... radial magnet, 3... second yoke body (radial yoke).

Claims

[Scope of utility model registration claim] In order to record or erase information on large and small diameter recording media mounted on the main body side and to reproduce information from these recording media, selectively switching between these recording media is required. In the 3-axis drive type objective lens actuator attached to the casing of the optical head for a shared optical recording and reproducing device that can be moved, the objective lens, a flat coil for jitter, a rectangular coil for radial, and a circular coil for focus are used. A substantially rectangular holder to which a
a first yoke stretched by a linear elastic body and a straight elastic body, and comprising a focus yoke provided with a focus magnet and into which the circular coil is loosely inserted; and a jitter yoke provided with a jitter magnet and positioned opposite to the flat coil; An objective lens actuator comprising: a second yoke body having a radial magnet and a radial yoke for loosely inserting the square coil;