JPS61111027U

JPS61111027U -

Info

Publication number: JPS61111027U
Application number: JP19326784U
Authority: JP
Priority date: 1984-12-19
Filing date: 1984-12-19
Publication date: 1986-07-14

Description

[Brief explanation of the drawing]

図面は本考案の実施例を示すもので、第１図は
本考案３軸光ヘツドの斜視図、第２図はその分解
斜視図、第３図は平面図、第４図は第３図のＡ―
Ａ線に於ける部分断面図、第５図はラジアルコイ
ルの駆動回路図、第６図はラジアルコイルの推力
の差を調整する制御回路図である。１……固定部、２……フレーム、３……レンズ
ホルダー、４……フオーカス用板バネ、５……ラ
ジアル用Ｖ型バネ、６……アクチユエーターベー
ス、６１……バネ取付け部、６２……コイル取付
け部、６３……コイル取付け部、６４……間隙部
、７……ラジアル制御用磁気回路、８……ラジア
ル制御用磁気回路、９……ジツター制御用磁気回
路、１０……スペーサー、１１……対物レンズ、
１２……ジツターコイル、１３……ラジアルコイ
ル、１４……ラジアルコイル、１５……フオーカ
スコイル、１７……ジツター用バネ、１８……フ
オーカス制御用磁気回路、１９……ビームスポツ
ト、２０……光軸、Ｄ……デイスク、Ｈ……ヘツ
ド本体。 The drawings show an embodiment of the present invention; FIG. 1 is a perspective view of the three-axis optical head of the present invention, FIG. 2 is an exploded perspective view thereof, FIG. 3 is a plan view, and FIG. A-
FIG. 5 is a radial coil drive circuit diagram, and FIG. 6 is a control circuit diagram for adjusting the difference in thrust of the radial coils. DESCRIPTION OF SYMBOLS 1... Fixed part, 2... Frame, 3... Lens holder, 4... Leaf spring for focus, 5... V-shaped spring for radial, 6... Actuator base, 61... Spring mounting part, 62 ...Coil mounting portion, 63...Coil mounting portion, 64...Gap portion, 7...Magnetic circuit for radial control, 8...Magnetic circuit for radial control, 9...Magnetic circuit for jitter control, 10...Spacer , 11...objective lens,
12...Jitter coil, 13...Radial coil, 14...Radial coil, 15...Focus coil, 17...Jitter spring, 18...Magnetic circuit for focus control, 19...Beam spot, 20...Light Shaft, D...disc, H...head body.

Claims

[Scope of utility model registration request]

Fix both ends of a radial V-shaped spring to the spring attachment part on the actuator base, fix the end of a focus plate spring on a different level to the fixing part at the top of the radial V-shaped spring, and fix the other end. The frame is fixed to the frame and supported horizontally on the base, the lens holder with the objective lens attached is supported parallel to the frame surface by a jitter spring installed upright on the frame, and the focus coil is attached to the bottom of the frame. A jitter coil is provided on the lens holder, and a radial coil is provided on the lens holder and the frame, and these three types of coils are provided on the actuator base, respectively. A 3-axis optical head that is interposed and combined.