JPS6387638U

JPS6387638U -

Info

Publication number: JPS6387638U
Application number: JP18311886U
Authority: JP
Priority date: 1986-11-28
Filing date: 1986-11-28
Publication date: 1988-06-08

Description

[Brief explanation of the drawing]

第１図は本考案に係る光学式デイスクプレーヤ
の要部であるピツクアツプ装置とターンテーブル
の平面図、第２図は該ピツクアツプ装置の拡散分
解図、第３図は各光学素子とデイスクの一部を示
す斜視図、第４図ないし第７図はレンズ駆動系を
説明するための一部詳細図、第８図ａ，ｂはグレ
イテイングを担持したホルダの側面図及び正面図
、第９図及び第１０図はミラーの取付構造を説明
するための一部詳細図、第１１図ないし第１６図
は受光素子の位置調整機構を示す一部詳細図（但
し、第１２図及び第１３図は第１１図に関する各
々―矢視図及び―断面図、第１
４図は第１１図に関する―断面図、第１
５図は第１４図に関する―矢視図）、第
１７図ａないし第１８図ｂはフレキシブルプリン
ト基板を示す図、第１９図は可撓線の正面図、第
２０図は防振部材としての粘弾性部材のフオーカ
ス方向における圧縮量―荷重特性を示す図、第２
１図及び第２２図は受光素子の位置調整機構の変
型例を示す図、第２３図ないし第２６図は従来例
を説明するための図である。主要部分の符号の説明、１……筐体、１ａ，１
ｂ……規制突部、１ｃ，１４ｅ……マーク、１ｅ
……挿入孔、１ｇ，１ｈ……スリツト、１ｉ……
治具挿入孔、１ｊ……凹部、１ｋ……摺接部、１
ｌ……リブ、１ｍ……位置決め面、１ｎ……突起
、１ｏ……斜面、１ｐ……切欠部、２……蓋体、
２ａ……開口部、３……レーザダイオード、４…
…グレイテイング、５……ハーフミラー、６……
ミラー、６ａ……反射面、６ｂ……非反射面、８
……ターンテーブル、９……ガイドシヤフト、１
０……デイスク、１２……受光素子、１３……対
物レンズ、１４……レンズホルダ、１４ａ……貫
通孔、１４ｂ……ボビン部、１４ｃ……開口部、
１５，２８，３１……ねじ、１７……ベース部材
、１７ａ……ねじ孔、１７ｂ……ヨーク部、１７
ｃ……ポールヨーク部、１８……支持シヤフト、
１８ａ……クリーナ、１９……フオーカシングコ
イル、２０……トラツキングコイル、２２……カ
ウンタウエイト、２３……マグネツト、２４……
磁束中心、２６……粘弾性部材、２６ａ……環状
部、２６ｂ，２６ｃ……取り付け部、２９……固
定プレート、３０……サブプレート、３３……樹
脂製筒状ホルダ、３３ａ……長手突起、３５，３
７，４４，４６……板ばね、３５ａ，３７ａ……
押圧部、３５ｂ……遮蔽部、３７ｂ……受面、３
７ｃ……受部、４０……ベース部材、４０ａ……
凹部、４０ｂ……斜面、４０ｃ……下端部、４０
ｄ……貫通孔、４０ｆ……開口部、４１……支持
部材、４１ａ……治具挿入孔、４１ｃ……突起、
４８，５６……位置調整治具、５０，５２……フ
レキシブルプリント基板、５０ａ……導線、５０
ｂ……凹部、５０ｃ……突出部、５０ｄ……スリ
ツト、５３……可撓線、５３ａ，５３ｂ……素線
、５４……小プリント基板。 Fig. 1 is a plan view of a pickup device and a turntable, which are the main parts of an optical disc player according to the present invention, Fig. 2 is a diffusion exploded view of the pick-up device, and Fig. 3 is a part of each optical element and a disc. FIGS. 4 to 7 are partially detailed views for explaining the lens drive system, FIGS. 8a and 8b are side and front views of the holder carrying the grating, and FIGS. Fig. 10 is a partially detailed view for explaining the mirror mounting structure, and Figs. 11 to 16 are partially detailed views showing the position adjustment mechanism of the light receiving element (however, Figs. 12 and 13 are 11 - Arrow view and - sectional view, 1st
Figure 4 is related to Figure 11 - sectional view, 1st
5 is a view in the direction of arrows related to FIG. 14), FIGS. 17a to 18b are views showing a flexible printed circuit board, FIG. 19 is a front view of a flexible wire, and FIG. A diagram showing the compression amount-load characteristics of a viscoelastic member in the focus direction, 2nd
1 and 22 are diagrams showing modified examples of the position adjustment mechanism for the light receiving element, and FIGS. 23 to 26 are diagrams for explaining the conventional example. Explanation of symbols of main parts, 1...Case, 1a, 1
b...Regulation protrusion, 1c, 14e...Mark, 1e
...Insertion hole, 1g, 1h...Slit, 1i...
Jig insertion hole, 1j... recess, 1k... sliding contact part, 1
l...Rib, 1m...Positioning surface, 1n...Protrusion, 1o...Slope, 1p...Notch, 2...Lid,
2a...Aperture, 3...Laser diode, 4...
... Grating, 5... Half mirror, 6...
Mirror, 6a... Reflective surface, 6b... Non-reflective surface, 8
... Turntable, 9 ... Guide shaft, 1
0... Disc, 12... Light receiving element, 13... Objective lens, 14... Lens holder, 14a... Through hole, 14b... Bobbin part, 14c... Opening part,
15, 28, 31... Screw, 17... Base member, 17a... Screw hole, 17b... Yoke part, 17
c...Pole yoke part, 18...Support shaft,
18a...Cleaner, 19...Focusing coil, 20...Tracking coil, 22...Counterweight, 23...Magnet, 24...
Magnetic flux center, 26... Viscoelastic member, 26a... Annular part, 26b, 26c... Attachment part, 29... Fixed plate, 30... Sub plate, 33... Resin cylindrical holder, 33a... Longitudinal projection ,35,3
7, 44, 46...plate spring, 35a, 37a...
Pressing part, 35b... Shielding part, 37b... Receiving surface, 3
7c... Receiving part, 40... Base member, 40a...
Recessed portion, 40b...Slope, 40c...Lower end, 40
d...Through hole, 40f...Opening, 41...Support member, 41a...Jig insertion hole, 41c...Protrusion,
48, 56... Position adjustment jig, 50, 52... Flexible printed circuit board, 50a... Conductive wire, 50
b... Recessed portion, 50c... Projection, 50d... Slit, 53... Flexible wire, 53a, 53b... Element wire, 54... Small printed circuit board.

Claims

[Scope of utility model registration request]

It includes a housing that houses an optical system that irradiates a light beam obtained from a light source onto a recording surface of an information recording medium through an objective lens, receives the reflected light, and relays it to a light receiving element, and a lens drive system that positions the objective lens. In the optical information pickup device, the lens drive system includes a support mechanism that includes a holder carrying the objective lens and supports the objective lens movably in the optical axis direction of the objective lens and in a direction substantially perpendicular thereto. , comprising a driving means for moving the objective lens, and an annular viscoelastic member interposed between the holder and a fixed-side predetermined member such that the annular center axis is substantially perpendicular to the optical axis direction. . An optical information pickup device, wherein a drive reference point of the lens drive system in the optical axis direction is set at a position where the annular viscoelastic member is compressed by a predetermined amount in the optical axis direction.