JPS60253028A - Optical pickup - Google Patents

Optical pickup

Info

Publication number
JPS60253028A
JPS60253028A JP10904784A JP10904784A JPS60253028A JP S60253028 A JPS60253028 A JP S60253028A JP 10904784 A JP10904784 A JP 10904784A JP 10904784 A JP10904784 A JP 10904784A JP S60253028 A JPS60253028 A JP S60253028A
Authority
JP
Japan
Prior art keywords
spring
objective lens
holder
track
focus
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP10904784A
Other languages
Japanese (ja)
Inventor
Hideo Hoshi
英男 星
Shigeru Inagaki
滋 稲垣
Chikayoshi Miyata
宮田　千加良
Ikuo Minamino
郁夫 南野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Seiko Instruments Inc
Original Assignee
Seiko Instruments Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Seiko Instruments Inc filed Critical Seiko Instruments Inc
Priority to JP10904784A priority Critical patent/JPS60253028A/en
Publication of JPS60253028A publication Critical patent/JPS60253028A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0925—Electromechanical actuators for lens positioning
    • G11B7/0932—Details of sprung supports

Landscapes

  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE:To prevent a higher order resonance of a focus spring, and a buckling phenomenon of a track spring by forming a titled optical pickup by the focus spring whose one end is fixed to an objective lens holder, a spring holder provided with a shaft for holding the other end of the focus spring and rotating and deflecting an objective lens, and a bearing holder. CONSTITUTION:When a current flows to a focus coil 13, a driving force is generated in the upper and lower directions by a magnetic flux generated by magnetic circuits 21, 22. A focus spring 15 is constituted of two pairs of upper and lower parallel plate springs, therefore, an objective lens 11 can be vibrated by coinciding roughly with an optical axis generated from an optical system. When a current flows to a track coil 14, a driving force is generated in the track direction by a magnetic flux generated by the magnetic circuits 21, 22. The driving force is transferred to an objective lens holder 12, it is brought to a rotary reciprocating movement centering around a shaft 17, this rotary reciprocating movement is controlled by a track spring 23 fixed to one end of a spring holder 16, and also a damper effect for driving a track is generated by a film-shaped rubber 24 and a space 26.

Description

【発明の詳細な説明】 〔産業上の利用分野Ｊ 不允明は光学式ピックアップのアクチュエータに関する
ものである。さらに詳しくは対物レンズ、の駆動方法に
関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field J] The present invention relates to an actuator for an optical pickup. More specifically, the present invention relates to a method of driving an objective lens.

〔従来技術〕[Prior art]

従来対物レンズをフォーカス方向およヒトラソ夕方向に
偏位させる構造の光学式ピックアップにおける対物レン
ズの駆動方法は、第２図に示すように、対物レンズ１が
対物レンズホルダ２に保持され、対物レンズホルダが平
行板ばね状のフォーカスげね５で支持され、フォーカス
げね６の他端は、ばねホルダ４に固定さｔ、さらにばね
ホルダ４は、トラック方向に対物レンズホルダ２か平行
移動できるように、フォーカスばね５とは９００傾けた
方向ＶＣ配置され平行板ばね状のトラックげね５で保持
され、トラックばね５が床板６に固足されているのが普
通であった。A conventional method for driving an objective lens in an optical pickup having a structure in which the objective lens is deflected in the focus direction and in the horizontal direction is as shown in FIG. The holder is supported by a focus spring 5 in the form of a parallel leaf spring, and the other end of the focus spring 6 is fixed to a spring holder 4, and the spring holder 4 is configured to be movable parallel to the objective lens holder 2 in the track direction. Generally, the focus spring 5 is arranged in a direction VC inclined by 900° and held by a track spring 5 in the form of a parallel leaf spring, and the track spring 5 is fixed to a floor plate 6.

〔発明が解次しようとする問題点」 しかしこの方法の場合、ツメーカス方同の駆動に対して
は特に問題はないか、トラック方間全駆動する場合、加
振点が対物レンズホルダ２であるため、トラックばね５
への偏位力はフオーノノスばね３を介して伝達される１
こめ、フォーカスばね５の巾方向の共（最モードが発生
し、尚次共振が起さてし寸うだけでなく、トランクばね
５Ｖこ座屈＆＆が兄生じ易くなるという欠点を有してい
た。[Problems to be solved by the invention] However, in the case of this method, there is no particular problem in driving the two tracks in the same direction, or if the entire track direction is driven, the excitation point is the objective lens holder 2. Therefore, track spring 5
The deflection force to 1 is transmitted via the phononous spring 3.
However, the main mode of the focus spring 5 in the width direction not only tends to occur, but also causes buckling of the trunk spring 5V.

不発明は、かかる欠点全除去すること全目的とし、トラ
ック方向の対物レンズの移動を回転ａ！動にすることに
より目的を達成しようとするものである。The entire purpose of the invention is to eliminate all such drawbacks, and the movement of the objective lens in the track direction is rotated a! The goal is to achieve the goal by making the system move.

以下不発明の好適な実施例の構造について図面と共に説
明する。第１図に本発明による光学式ピックアップの平
面図、第５図６不発明による光学式ピックアップの側断
面図である。符号１１で示されるものは対物レンズで、
対物レンズ１１は符号１２で示される対物レンズホルダ
で保持されている。対物レンズホルダ１２には、第１図
の平面図で児でフォーカスコイル１３が巻かれており、
その両端［Ｕ、トラックコイル１４が貼付されている。The structure of a preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view of an optical pickup according to the present invention, and FIG. 5 is a side sectional view of an optical pickup according to the invention. What is indicated by numeral 11 is an objective lens,
The objective lens 11 is held by an objective lens holder designated by the reference numeral 12. A focus coil 13 is wound around the objective lens holder 12 as shown in the plan view of FIG.
Both ends [U, the track coil 14 are attached.

′！た対物レンズホルダ１２の一端ＶＣは対物レンズ１
１を挾んで上下２対の平行板げね状のフォーカスはね１
５が固にされてお゛す、フォーカスばね１５の他端はは
ねホルダ１６Ｖｃ固足されている。はねホルダ１６は対
物レンズ１１會トラツク方向に偏位せしめるべく、光−
１と平行に軸１７が具備されている。符号１８で示さ′
ｎるものは軸受ホルダて、上下に人造宝石よりなる軸受
１９が具備され、前記＠１７（Ｉ−回転自在に軸支し−
Ｃいる。′! One end VC of the objective lens holder 12 is connected to the objective lens 1.
1 and two pairs of upper and lower parallel plate-like focus blades 1.
5 is fixed, and the other end of the focus spring 15 is fixed to a spring holder 16Vc. The blade holder 16 is configured to deflect light in the direction of the optical track of the objective lens 11.
A shaft 17 is provided parallel to 1. Indicated by numeral 18'
The bearing holder is equipped with bearings 19 made of artificial jewels on the upper and lower sides, and the above-mentioned @17 (I- Rotatably supported)
There is C.

符号２（Ｉで示されるものは床板であり、前記軸受ホル
ダ１８が固足されている。また符号２１．２２で示され
るものは、磁気回路であジ床板２０に固定されており、
磁気回路２１．２２のギャップ部には前記対物レンズホ
ルダ１２のコイル部分が配置される。符号２６で示され
るものは平（８）板ばね状のトラックばねであり、トラ
ックばね２５には膜状ゴム２４が貼付されている。この
部分は第５図、第６図に詳しく示してめゐ。前ｄ己トラ
ンクはね２５は、床板２０に固足さｎたトラックばねホ
ルダ２５に、トランクばね２６の外周全密層して固定さ
れている。またトラックばねホルダ２５Ｖｃは、トラッ
クばね２５が振動しｆｃときに、トランクばねホルダ２
５に当らないように空間２６を有している。そしてトラ
ックばね２５の中央部ハ、前記げねホルダ１６Ｖｃ固矩
さｉｔた全体のアクテュエータが構成される。The symbol 2 (I) is a floor plate to which the bearing holder 18 is fixedly attached. The symbol 21 and 22 are fixed to the floor plate 20 by a magnetic circuit.
A coil portion of the objective lens holder 12 is placed in the gap between the magnetic circuits 21 and 22. The track spring indicated by the reference numeral 26 is a flat (8) leaf spring, and a rubber film 24 is attached to the track spring 25 . This part is shown in detail in Figures 5 and 6. The front trunk spring 25 is fixed to a track spring holder 25 firmly attached to the floorboard 20 so as to cover the entire outer circumference of the trunk spring 26. In addition, when the truck spring 25 vibrates fc, the truck spring holder 25Vc
It has a space 26 so that it does not hit 5. The central part of the track spring 25 and the barb holder 16Vc constitute the entire actuator.

第４図は不発明の別の実施例ＶＣついて示している。軸
受１９の人造宝石か、ボールベアリング２７で構成され
ている。FIG. 4 shows another embodiment of the invention VC. It consists of an artificial jewel bearing 19 or a ball bearing 27.

〔作　用〕[For production]

不発明は以上のような構造を持ってｂ′ジ、以下図面と
共に不発明の動作について説明する。はじメ［フォーカ
ス方向について説明すると、フォーカスコイル１．５［
電流が流れあと、磁気回路２１゜２２によって発生して
いる磁束Ｖこよって上下方向に駆動力が発生する。駆動
力はＢ物しンズホルダ１２に伝達されフォーカスはね１
５に、支持されながら上下ＶＣ４勤する。フォーカスは
ね１５は上下二組の平行板げねで構成されているため、
対物レンズ１１は、光学系から発生される元軸とほぼ一
致して駆動することができる。The invention has the above-mentioned structure, and the operation of the invention will be explained below with reference to the drawings. [To explain the focus direction, focus coil 1.5 [
After the current flows, a driving force is generated in the vertical direction due to the magnetic flux V generated by the magnetic circuits 21 and 22. The driving force is transmitted to the B object lens holder 12 and the focus spring 1
5th, I worked four shifts at the upper and lower VCs while being supported. Since the focus blade 15 is composed of two sets of upper and lower parallel plate blades,
The objective lens 11 can be driven to substantially coincide with the original axis generated by the optical system.

つきにトラック方向について説明すると、トラックコイ
ル１４Ｖｃ′亀流が流れると、磁気回路２１゜２２　Ｖ
Ｃよって発生している伝来によってトラック方向に駆動
力が発生する。ｌｊＡ動力は対物レンズホルダ１２に伝
達され、軸１７ケ中心として回転往復移動をする。セし
てこの回転往復移動の規制は、ばねホルダ１６の一端に
固定されたトラックばね２３１′ｃよってなされ、さら
にトラックばね２３に貼付された膜状ゴム２４と、トラ
ックばねホルダ２５Ｖこよって形成される空間２６でも
ってトラック駆動のダンパ効果を発生させている。First, to explain the track direction, when the track coil 14Vc' torrent flows, the magnetic circuit 21°22 V
A driving force is generated in the track direction by the transmission generated by C. The ljA power is transmitted to the objective lens holder 12, which rotates and reciprocates about the axis 17. This rotational reciprocating movement is controlled by a track spring 231'c fixed to one end of the spring holder 16, and further formed by a rubber film 24 attached to the track spring 23 and a track spring holder 25V. The damper effect of the track drive is generated by the space 26.

−１た、軸受１９は人造宝石でできでいるため、少ない
摩擦で回転することができる。そして軸受２７（１ボー
ルベアリングでできているため、人造宝石と同ａＶこ少
ない摩擦で自転することができる。-1 Furthermore, since the bearing 19 is made of artificial jewelry, it can rotate with less friction. Since the bearing 27 (1) is made of a ball bearing, it can rotate with the same aV as artificial jewelry and less friction.

〔発明の効果〕〔Effect of the invention〕

本発明は以上のような構造及び動作金持っているため、
言いかえると、フォーカス方向は平行板ばねで偏位させ
、トラック方向は回転軸全中心として偏位させる構造Ｖ
Ｃ′ｆｘっているため、トラック方向の動きが非常に安
定しており、対物レンズがトラック偏位中に傾くことも
ないため、高次の共振も発生せず、アクチュエータとし
ては、非虜に＾性能になる。また、軸受部分に人造宝石
やボールベアリングを配す◇ことにより、摩擦もほとん
どなく安定した制御特性か得られる。トラックばねも平
面板ばねで１！成されているため、仝気ダンパとの組み
合せで非常に扱い易い特性が少ない部品点数で得られ、
その効果は大きい。Since the present invention has the structure and operation described above,
In other words, the focus direction is deviated by a parallel plate spring, and the track direction is deviated from the center of the rotation axis V.
C'fx, the movement in the track direction is very stable, and the objective lens does not tilt during track deviation, so high-order resonance does not occur, and as an actuator, it is very stable. ^ It becomes performance. In addition, by placing artificial jewels and ball bearings in the bearing part◇, stable control characteristics can be obtained with almost no friction. Track springs are also flat leaf springs! Because of this structure, when combined with an air damper, it has very easy-to-handle characteristics with a small number of parts.
The effect is great.

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

第１図は不発明による平面図。 第２図は従来例による平面図。 第３区μ不発明による側断面図。 第４図（１不％明による別の実施例の側断面図。 第５図は不発明ｌこよあトランクぼねの廁視区。 第６図は不弁明によるトラックばねの側断面図である。 １・・・・対物レンズ　２・・・・・７才物レンズホル
ダ６〜・・・・・フォーカスはね　４・　・ばねホルダ
５・・・・・トラックげね　６　・・・床板１１・・・
・・・対物レンズ　１２・・・・・・対物レンズホルダ
１５・・・・・・フォーカスコイル　１４・・トランク
コイル１５・・・・フォーカスばね　１６・・　げねホ
ルダ１７・・・・・細　１８・・・・・・軸受ホルダ１
９・・・・・軸受　２０・・・・・・床板２１・・・・
・磁気回路　２２・・・・・・磁気回路２６・・・・・
・トラックばね　２４・・・・・・膜状ゴム２５・・　
トラックはねホルダ　２６・・・・空間２７・・・・・
・ボールベアリング 以　上 出願人　セイコー翫子工業株式会社 代理人　弁理士　最　上　侘 ■ 第３図 第４図 第５図 第６図FIG. 1 is a plan view according to the invention. FIG. 2 is a plan view of a conventional example. Section 3: Side sectional view according to the invention. Figure 4 is a side sectional view of another embodiment according to the invention. Figure 5 is a side sectional view of the trunk spring according to the invention. Figure 6 is a side sectional view of the track spring according to the invention. 1... Objective lens 2... 7-year-old lens holder 6... Focus spring 4... Spring holder 5... Track genera 6... Floor plate 11...・・・
... Objective lens 12 ... Objective lens holder 15 ... Focus coil 14 ... Trunk coil 15 ... Focus spring 16 ... Generic holder 17 ... Thin 18 ...Bearing holder 1
9... Bearing 20... Floor plate 21...
・Magnetic circuit 22...Magnetic circuit 26...
・Track spring 24... Membrane rubber 25...
Track spring holder 26... Space 27...
・Ball bearings and above Applicant: Wataru Mogami, Patent Attorney, Seiko Kanko Industries Co., Ltd. Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

【特許請求の範囲】 （１）　対物レンズと対物レンズ全保持する対物レンズ
ホルダと、対物レンズ金元軸に対し平行に移動せしめる
ための、１対以上の平行に配置され、一端が前記対物レ
ンズホルダに固定されたフォーカスばねと、フォーカス
げねの他端全保持し、前記対物レンズをトラック方向に
対して回転偏位せしめるための軸全具備したばねホルダ
と、ばねホルダの軸？支持する軸受を有する軸受ホルダ
よりなること’ｆｒ％徴とする光学式ピックアップ。 （２）軸受が、人造宝石であること全特徴とする特許請
求範囲第１項記載の光学式ピックアップ。 （８）軸受が、ボールベアリングであること全特徴とす
る特許請求範囲第１項記載の光学式ピックアップ。 １剖　対物レンズと回転軸を結ぶ線上において、磁気回
路が対物レンズ全快んで２組配置されていることを特徴
とする％ｆｆ請求範囲第１項記載の光学式ピックアップ
。 （５）膜状ゴムが貼付された平面板ばね状のトラックば
ねと、前記トラックばねの外周全密増固矩し、トラック
げねの偏位全逃けるための密＠＃４造の空間を有するト
ラックげねホルダより構成式れ、トランクはねの中央部
かばねホルダの一端に固定されアクチュエータが仇成さ
れていることを特徴とする特訂謂水の範朋第１項糺載の
光学式ピックアップ。[Scope of Claims] (1) An objective lens, an objective lens holder that holds the entire objective lens, and one or more pairs of objective lens holders arranged in parallel to move the objective lens in parallel to the axis of the objective lens, one end of which is connected to the objective lens holder. A focus spring fixed to a holder, a spring holder having a complete shaft for holding the entire other end of the focus spring and rotationally deflecting the objective lens with respect to the track direction, and a shaft of the spring holder. An optical pickup comprising a bearing holder having a supporting bearing. (2) The optical pickup according to claim 1, characterized in that the bearing is an artificial jewel. (8) The optical pickup according to claim 1, wherein the bearing is a ball bearing. 1. The optical pickup according to claim 1, characterized in that two sets of magnetic circuits are arranged on a line connecting the objective lens and the rotation axis, with the entire objective lens completely covered. (5) A track spring in the form of a flat leaf spring to which a rubber film is attached, and the outer periphery of the track spring are reinforced and rectangular to create a space with a tight @#4 structure to escape all deviation of the track spring. An optical system as described in Section 1 of the Special Edition of the So-called Water Handbook, characterized in that it consists of a truck spring holder having a trunk spring, and is fixed to the center of the trunk spring or one end of the spring holder, and an actuator is provided thereon. pick up.
JP10904784A 1984-05-29 1984-05-29 Optical pickup Pending JPS60253028A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10904784A JPS60253028A (en) 1984-05-29 1984-05-29 Optical pickup

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10904784A JPS60253028A (en) 1984-05-29 1984-05-29 Optical pickup

Publications (1)

Publication Number Publication Date
JPS60253028A true JPS60253028A (en) 1985-12-13

Family

ID=14500255

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10904784A Pending JPS60253028A (en) 1984-05-29 1984-05-29 Optical pickup

Country Status (1)

Country Link
JP (1) JPS60253028A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5243584A (en) * 1991-03-23 1993-09-07 Hyundai Electronics Industries Co., Ltd. Stabilized optical pick-up unit for use in a disk player

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5243584A (en) * 1991-03-23 1993-09-07 Hyundai Electronics Industries Co., Ltd. Stabilized optical pick-up unit for use in a disk player

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