JPS61156015U

JPS61156015U -

Info

Publication number: JPS61156015U
Application number: JP3839285U
Authority: JP
Priority date: 1985-03-18
Filing date: 1985-03-18
Publication date: 1986-09-27
Anticipated expiration: 2000-03-18
Also published as: JPH0519854Y2

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案の実施例としてのピツクアツプ
装置の正断面図、第２図ないし第５図は第１図に
関する各々―矢視図、―矢視図、―
矢視図及び―矢視図、第６図は第３図に関す
る―矢視図、第７図は該ピツクアツプ装置の
一部詳細図、第８図ａないしｆはピツクアツプボ
デイの各々半断面を含む正面図、左側断面図、右
側断面図、平面図、底面図及び背面図、第９図は
該ピツクアツプ装置の一部詳細図、第１０図ａ及
ｂは波長板を担持するホルダの各々平面図及び正
面図、第１０図ｃは第１０図ａに関するｃ―ｏ―
ｃ断面図、第１１図ａ，ｂ及びｃは該ホルダを保
持するベース部材本体の各々平面図、右側面図及
び背面図、第１１図ｄは第１１図ａに関するｄ―
ｄ断面図、第１２図及び第１３図は対物レンズと
その駆動機構を示す各々分解斜視図及び斜視図、
第１４図ａないしｅはカバー部材の各々平面図。
左側断面図、右側断面図、正面図及び背面図、第
１５図ａないしｆは支持体の各々正面図、左側面
図、右側面図、平面図、底面図及び背面図、第１
６図は受光素子の受光面詳細図、第１７図は対物
レンズの移動ストロークと停止位置の関係を説明
するための図、第１８図は既に開発されているピ
ツクアツプ装置の要部斜視図である。主要部分の符号の説明、１……ピツクアツプボ
デイ、１ａ……貫通孔、１ａ，１ｃ，７ａ……受
け面、２１ａ，１ｅ，１ｆ，１ｇ……調整治具挿
入孔、１ｈ……接着剤溜り、１ｉ……案内孔、１
ｋ……座グリ部、１ｌ……長孔、１ｍ，１７ａ，
５０ａ，５０ｂ，５０ｃ……開孔部、１ｎ，１７
ｂ，４１ａ……凹部、１ｐ……丸孔、３……レー
ザダイオード、４……グレイテイング、４ａ……
外側面、５……ビームスプリツタ、５ａ，５ｂ…
…光軸、６……コリメータレンズ、７，８，９，
２１……円筒状ホルダ、７ｂ……内周面、７ｃ…
…ひとみ、７ｄ……壁部、９ａ……センタリング
ガイド部、１１，１２，２３ｂ……波状座金、１
４……円筒状スリーブ、１４ａ……光通過孔、１
４ｂ……壁部、１４ｃ……外側面、１６……受光
素子、１７……板状ベース部材、１８……押圧バ
ネ、１９ａ，１９ｂ，２３，３９ａ，３９ｂ，４
５，５１，５２ａ……ネジ、２０……マルチレン
ズ、２１ａ……環状溝、２３ａ……ワツシヤ、２
３ｃ……首部スリーブ、２５……波長板、２６…
…ホルダ、２６ａ……座グリ部、２６ｂ……弧状
部分、２６ｄ，４７ｂ……突起、２６ｅ……外周
、２６ｆ……アーム部、２６ｇ……屈曲部、２７
……ベース部材本体、２７ａ……支持突部、２７
ｂ……中心孔、２９……デイスク、３０……対物
レンズ、３０ａ……レンズパツド、３０ｂ……カ
ウンタウエイト、３１……リンズホルダ、３１ａ
，３１ｂ……張出部、３１ｃ……切欠部、３２…
…フオーカシングコイル、３４……ボビン、３５
……トラツキングコイル、３６，３８……板バネ
、３７……中継部材、３７ａ……突出部、３７ｂ
……接着剤の逃げ溝、３９……ベース部材、３９
ｃ……位置決め突起、３９ｄ……凹部、４１……
マグネツト、４２……ヨーク、４２ａ……突部、
４２ｂ……サブヨーク、４２ｄ……テーパ部、４
３……プリント基板、４７……カバー部材、４７
ａ，５０ｅ……可撓性係合爪、４７ｄ……傾斜部
、４７ｅ……半球状突起、５０……樹脂性支持体
、５０ｄ……センサステイ、５２……センサボー
ド、５３……発光ダイオード、５４，５７，５８
……フオトダイオード、５５……制御回路基板。 FIG. 1 is a front cross-sectional view of a pick-up device as an embodiment of the present invention, and FIGS. 2 to 5 are respectively a view in the direction of the arrows, a view in the direction of the arrows, and a view in the direction of the arrows in FIG.
6 is a view in the direction of the arrows related to FIG. 3, FIG. 7 is a partially detailed view of the pickup device, and FIGS. 8a to 8f each include a half section of the pickup body. A front view, a left sectional view, a right sectional view, a top view, a bottom view and a rear view, FIG. 9 is a partially detailed view of the pickup device, and FIGS. 10 a and 10 b are respective plan views of the holder that supports the wave plate. and front view, Figure 10c is c-o- with respect to Figure 10a.
11a, b, and c are respectively a plan view, a right side view, and a rear view of the base member body holding the holder; FIG. 11d is a sectional view related to FIG. 11a;
d sectional view, FIGS. 12 and 13 are an exploded perspective view and a perspective view showing the objective lens and its drive mechanism, respectively;
FIGS. 14a to 14e are plan views of each cover member.
The left side sectional view, the right side sectional view, the front view and the rear view, and FIGS.
Figure 6 is a detailed view of the light receiving surface of the light receiving element, Figure 17 is a diagram for explaining the relationship between the movement stroke and the stop position of the objective lens, and Figure 18 is a perspective view of the main parts of a pickup device that has already been developed. . Explanation of symbols of main parts, 1...Pickup body, 1a...Through hole, 1a, 1c, 7a...Receiving surface, 21a, 1e, 1f, 1g...Adjustment jig insertion hole, 1h...Adhesive reservoir , 1i...guide hole, 1
k...Spot facing part, 1l...Long hole, 1m, 17a,
50a, 50b, 50c...Opening part, 1n, 17
b, 41a... recess, 1p... round hole, 3... laser diode, 4... grating, 4a...
Outer surface, 5... Beam splitter, 5a, 5b...
...Optical axis, 6...Collimator lens, 7, 8, 9,
21...Cylindrical holder, 7b...Inner peripheral surface, 7c...
...pupil, 7d...wall part, 9a...centering guide part, 11, 12, 23b...wavy washer, 1
4...Cylindrical sleeve, 14a...Light passing hole, 1
4b... Wall portion, 14c... Outer surface, 16... Light receiving element, 17... Plate base member, 18... Pressing spring, 19a, 19b, 23, 39a, 39b, 4
5, 51, 52a...Screw, 20...Multi lens, 21a...Annular groove, 23a...Washer, 2
3c... Neck sleeve, 25... Wave plate, 26...
...Holder, 26a... Spot facing portion, 26b... Arc-shaped portion, 26d, 47b... Protrusion, 26e... Outer periphery, 26f... Arm portion, 26g... Bent portion, 27
... Base member main body, 27a ... Support protrusion, 27
b...center hole, 29...disk, 30...objective lens, 30a...lens pad, 30b...counterweight, 31...lins holder, 31a
, 31b...projection, 31c...notch, 32...
...Focusing coil, 34...Bobbin, 35
... Tracking coil, 36, 38 ... Leaf spring, 37 ... Relay member, 37a ... Projection, 37b
... Adhesive relief groove, 39 ... Base member, 39
c...positioning protrusion, 39d...recess, 41...
Magnet, 42...Yoke, 42a...Protrusion,
42b...Sub yoke, 42d...Tapered portion, 4
3... Printed circuit board, 47... Cover member, 47
a, 50e...Flexible engagement claw, 47d...Slope portion, 47e...Semispherical projection, 50...Resin support, 50d...Sensor stay, 52...Sensor board, 53...Light emitting diode , 54, 57, 58
...Photodiode, 55...Control circuit board.

Claims

【実用新案登録請求の範囲】 (1) 記録媒体の記録面にスポツト光を照射せし
めるための対物レンズと、前記対物レンズを該対
物レンズの光軸方向及び前記光軸方向と垂直な方
向において移動可能に且つ前記対物レンズの光軸
が前記記録面に対して垂直であるように支持する
支持機構と、前記対物レンズを駆動する駆動手段
とを含み、前記駆動手段はコイル中心軸が前記光
軸方向と略平行であるように巻回された第１コイ
ルと、コイル中心軸が前記垂直な方向に略平行で
あるように巻回された第２コイルと、前記第１及
び第２コソルと鎖交する磁束を発生する磁気回路
とを有し、前記磁気回路は前記光軸方向及び前記
垂直な方向に対して垂直な方向において各々同極
が対向すべく且つ該対向極間にて前記第１及び第
２コイルを挾むように配置された一対のマグネツ
トと、前記一対のマグネツトの各非対向極を磁気
的に結合するヨークとを含み、前記ヨークの前記
マグネツトと接していない所定部分に前記対向極
の近傍に達する突部が設けられていることを特徴
とする光学式情報記録再生装置におけるピツクア
ツプ装置。 (2) 前記突部はその先端部が前記第２コイルの
近傍に位置するように形成されていることをこと
を特徴とする実用新案登録請求の範囲第１項記載
の光学式情報記録再生装置におけるピツクアツプ
装置。 (3) 前記突起はその先端部が前記第１コイルの
近傍に位置するように形成されていることを特徴
とする実用新案登録請求の範囲第１項または第２
項記載の光学式情報記録再生装置におけるピツク
アツプ装置。[Claims for Utility Model Registration] (1) An objective lens for irradiating a recording surface of a recording medium with spot light, and moving the objective lens in the optical axis direction of the objective lens and in a direction perpendicular to the optical axis direction. a support mechanism that supports the objective lens so that its optical axis is perpendicular to the recording surface; and a driving means that drives the objective lens, and the driving means has a coil center axis that is aligned with the optical axis. a first coil wound so as to be substantially parallel to the direction; a second coil wound so that the coil center axis is substantially parallel to the perpendicular direction; and a chain with the first and second cosols. a magnetic circuit that generates intersecting magnetic fluxes, the magnetic circuit having the same poles facing each other in a direction perpendicular to the optical axis direction and the perpendicular direction, and between the opposing poles, the first and a pair of magnets arranged to sandwich a second coil, and a yoke for magnetically coupling non-opposing poles of the pair of magnets, and the opposing pole is attached to a predetermined portion of the yoke that is not in contact with the magnet. 1. A pickup device for an optical information recording/reproducing device, characterized in that a protrusion reaching the vicinity of the pickup device is provided. (2) The optical information recording and reproducing device according to claim 1, wherein the protrusion is formed such that its tip is located near the second coil. pick-up device. (3) The utility model registration claim 1 or 2, characterized in that the protrusion is formed such that its tip is located near the first coil.
A pick-up device in the optical information recording and reproducing device as described in 1.