JPS6261028U

JPS6261028U -

Info

Publication number: JPS6261028U
Application number: JP15134385U
Authority: JP
Priority date: 1985-10-02
Filing date: 1985-10-02
Publication date: 1987-04-15

Description

[Brief explanation of the drawing]

第１図は本考案に係る光学ヘツドの駆動装置の
一実施例の上面図、第２図は第１図に示す装置の
光学ヘツド部の断面図、第３図は第１図に示す装
置のアクチユエータの上面図、第４図ａ〜ｃは第
１図に示す装置の光学ヘツド部と摺動機構部との
構造図、第５図は本考案の別な実施例に係る装置
の説明図で、同図ａは上面図、同図ｂは側断面図
、同図ｃはアクチユエータの斜視図、同図ｄはホ
ルダの斜視図、第６図は本考案の更に別な実施例
に係る装置の光学ヘツド部の説明図で、同図ａは
上面図、同図ｂは側断面図、同図ｃはダンパの上
面図である。１００……装置本体、１０……メカインデツク
ス検出部、２０……スピンドルモータ部、３０…
…光学ヘツド部、３１……アクチユエータ、３３
……キヤリツジ、３１１……全反射鏡、３１２…
…１／４波長板、３１３……対物レンズ、３１４
……ホルダ、３１５……トラツキング用コイル、
３１６……フオーカシング用コイル、３１７……
キヤリツジ本体、３１８……ヨーク、３１９……
板ばね、３２０……ブロツク、３２１……板ばね
、３２２……ブロツク、３２３……バランス、３
２４……溝、３２５……枢軸、３２６……ダンパ
、３３１……弾性部材、３３２……ベアリング、
３３３……アクセス用コイル、４０……摺動機構
部、４０１……ガイド、４０２……ヨーク、４０
３……放熱孔、４０４……アクセス用磁石、４０
５……アクチユエータ用磁石、５０……ビーム検
出部、５１……レーザダイオード、５２……コリ
メータレンズ、５３……プリズム系、５４……光
検出器。 1 is a top view of an embodiment of an optical head driving device according to the present invention, FIG. 2 is a sectional view of the optical head portion of the device shown in FIG. 1, and FIG. 3 is a cross-sectional view of the device shown in FIG. 1. A top view of the actuator, FIGS. 4a to 4c are structural diagrams of the optical head section and sliding mechanism section of the device shown in FIG. 1, and FIG. 5 is an explanatory diagram of the device according to another embodiment of the present invention. , Figure a is a top view, Figure b is a side sectional view, Figure c is a perspective view of the actuator, Figure d is a perspective view of the holder, and Figure 6 is a diagram of a device according to yet another embodiment of the present invention. FIG. 2 is an explanatory diagram of the optical head section, in which figure a is a top view, figure b is a side sectional view, and figure c is a top view of the damper. 100...Device main body, 10...Mechanical index detection section, 20...Spindle motor section, 30...
...Optical head section, 31... Actuator, 33
...Carriage, 311...Total reflection mirror, 312...
...1/4 wavelength plate, 313...Objective lens, 314
...Holder, 315...Tracking coil,
316...Focusing coil, 317...
Carriage body, 318... Yoke, 319...
Leaf spring, 320...Block, 321...Leaf spring, 322...Block, 323...Balance, 3
24...Groove, 325...Pivot, 326...Damper, 331...Elastic member, 332...Bearing,
333... access coil, 40... sliding mechanism section, 401... guide, 402... yoke, 40
3...Radiation hole, 404...Access magnet, 40
5... actuator magnet, 50... beam detection unit, 51... laser diode, 52... collimator lens, 53... prism system, 54... photodetector.

Claims

[Claims for Utility Model Registration] An access mechanism for moving an optical head having an objective lens in the radial direction of the optical disk to access a desired track; An optical head driving device comprising: a tracking mechanism that follows an accessed track; and a focusing mechanism that finely moves the objective lens in a direction perpendicular to the optical disk surface to adjust the focus; A tracking coil used in the tracking mechanism and a focusing coil used in the focusing mechanism are respectively provided in the optical head, and a magnetic field generating means for generating a magnetic field applied to each coil is placed at a stationary position with respect to the optical head. What is claimed is: 1. A drive device for an optical head, characterized in that it is integrated on a main body of the device for maintaining the optical head.