JP4111879B2 - Objective lens drive - Google Patents

Objective lens drive Download PDF

Info

Publication number
JP4111879B2
JP4111879B2 JP2003172164A JP2003172164A JP4111879B2 JP 4111879 B2 JP4111879 B2 JP 4111879B2 JP 2003172164 A JP2003172164 A JP 2003172164A JP 2003172164 A JP2003172164 A JP 2003172164A JP 4111879 B2 JP4111879 B2 JP 4111879B2
Authority
JP
Japan
Prior art keywords
objective lens
lens holder
drive
drive coil
coil body
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.)
Expired - Fee Related
Application number
JP2003172164A
Other languages
Japanese (ja)
Other versions
JP2005011402A (en
Inventor
真伸 村田
昇 田尻
昇 小野島
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.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo Electric Co Ltd
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 Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP2003172164A priority Critical patent/JP4111879B2/en
Priority to CNB2004100064584A priority patent/CN1259658C/en
Priority to KR1020040018145A priority patent/KR100548920B1/en
Priority to TW093117124A priority patent/TWI256043B/en
Publication of JP2005011402A publication Critical patent/JP2005011402A/en
Application granted granted Critical
Publication of JP4111879B2 publication Critical patent/JP4111879B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

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
    • G11B7/0933—Details of stationary parts
    • 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
    • G11B7/0935—Details of the moving parts

Description

【０００１】
【発明の属する技術分野】
本発明は、対物レンズが取り付けられるレンズホルダーがフレームに変位可能に弾性的に支持される対物レンズ駆動装置に関し、特に、レンズホルダーに装着される一対の駆動コイル体の連結の仕方を工夫した対物レンズ駆動装置に関する。
【０００２】
【従来の技術】
ディスク等の信号記録媒体に対して光学的に信号の読み取り、あるいは書き込みを行う光学ヘッドにおける対物レンズ駆動装置においては、周知のように、対物レンズが取り付けられたレンズホルダーをフレームに対して変位可能に支持し、フォーカシングコイル及びトラッキングコイル等の駆動コイル体を前記レンズホルダーに装着すると共に、前記駆動コイル体の使用部分を磁気回路により形成される所定の磁界内に配置することにより前記駆動コイル体に供給する信号に応じて対物レンズを駆動する構成となっている。
【０００３】
ところで、対物レンズ駆動装置においては、対物レンズをレンズホルダーの中央に配置し、レンズホルダーを挟んだ両側に磁気回路を形成する一対の磁石を対向配置すると共に、これらの各磁石にそれぞれ対向する一対の駆動コイル体を前記レンズホルダーに装着し、対物レンズを中心にレンズホルダー及び磁気回路を対称な構成として良好な特性を得られるようにする場合が多い。
【０００４】
ところで、一対の駆動コイル体がレンズホルダーの両側に配置され、各駆動コイル体にフォーカシングコイル及びトラッキングコイル、あるいはチルトコイルがそれぞれ存在するので、各駆動コイル体の同種のコイル同士を電気的に接続しており、駆動コイル体が一般的な巻き線を使用する場合には同種のコイル同士を連続して巻回していた。
【０００５】
一方、駆動コイル体をプリントコイルがパターンとして形成されるプリント基板により構成した対物レンズ駆動装置が知られている（例えば、特許文献１参照）。
【０００６】
このような駆動コイル体をプリント基板により構成した対物レンズ駆動装置においては、巻き線により同種のコイル同士を連続させることができないので、各駆動コイル体のプリント基板同士を連結基板により接続していた。
【０００７】
【特許文献１】
特開２００２−１５０５８４号公報
【０００８】
【発明が解決しようとする課題】
ところで、接続基板により各駆動コイル体のプリント基板同士を連結した対物レンズ駆動装置は、従来、上記特許文献１に示されるように、連結基板をレンズホルダーの側面に取り付けていた。
【０００９】
その為，レンズホルダーの重量バランスが悪くローリングが発生し易くなる問題があった。特に，連結基板を各駆動コイル体のプリント基板にハンダ付けにより接続することになるが、このハンダの重量による影響も大きくレンズホルダーの重量バランスの悪化をもたらした。
【００１０】
【課題を解決するための手段】
本発明は、レンズホルダーを挟んだ両側に対向配置された一対の磁石にそれぞれ対向するべく前記レンズホルダーに装着される一対の駆動コイル体を備え、各駆動コイル体とは別体の連結基板を前記レンズホルダーの対物レンズの取付面と逆側の底面側に設置して前記連結基板により前記各駆動コイル体とをハンダ付けにより連結している。これにより各駆動コイル体の連結を行うと共に、連結基板が設置されていない状態において対物レンズの取付面側に片寄っているレンズホルダーの重心を中央に近づけ、かつ、レンズホルダーの剛性向上を図っている。
【００１１】
【実施例】
図１は本発明に係る対物レンズ駆動装置の一例の完成状態を示す斜視図、図２は図１の対物レンズ駆動装置のフレーム部分を除いた展開斜視図、図３は図２と別角度から示す展開斜視図である。
【００１２】
フレーム１は軟鉄の金属板を板金加工して一体にヨーク２，３が形成され、このヨーク２，３にはレンズホルダー４を挟んだ両側に対向配置されるべく一対の永久磁石５，６がそれぞれ付設されている。
【００１３】
レンズホルダー４には上面に対物レンズ７が取り付けられ、また、レンズホルダー４の前記各永久磁石５，６にそれぞれ対向する側面には駆動コイル体８，９が接着固定により装着されている。
【００１４】
前記駆動コイル体８，９は、図示の如く、それぞれフォーカスコイル１０、トラッキングコイル１１ａ，１１ｂ及びチルトコイル１２がプリントコイルのパターンとして形成されるプリント基板により構成され、これらの各駆動コイル１０，１１ａ，１１ｂ，１２のパターン位置及び巻回方向は各プリント基板の両面に面対称に形成されている。
【００１５】
レンズホルダー４の駆動コイル体８，９の各装着面と隣り合う各側面には、それぞれの側面で互いに平行に配置される３本ずつの支持ワイヤー１３に接着固定される突部１４が形成されており、レンズホルダー４の各側の３本ずつ、合わせて６本の支持ワイヤー１３の各一端はフレーム１の切り起こし部１ａに補助部材１５と一緒に固定される固定基板１６に固定されている。
【００１６】
これによりレンズホルダー４は、６本の支持ワイヤー１３によりフレーム１にフォーカス方向及びトラッキング方向に変位可能に弾性的に支持される。
【００１７】
６本の支持ワイヤー１３の固定基板１６に固定される端部ではないもう一方の各端部は一方のコイル体８に突き当てられてハンダ付けにより所定の支持ワイヤー１３と駆動コイル体８の所定の駆動コイルとがそれぞれ関係付けられて接続される。
【００１８】
また、補助部材１５の左右３本ずつの支持ワイヤー１３が貫通される各孔１７にはダンプ剤が充填され、各支持ワイヤー１３の制振が図られている。
【００１９】
ところで、各永久磁石５，６は図４に示すように面方向に４領域に区分されるように着磁されており、駆動コイル体８，９とフォーカスコイル１０、トラッキングコイル１１ａ，１１ｂ及びチルトコイル１２との位置関係は図５に示す如く、各駆動コイルをそれぞれ二分するように永久磁石５，６の着磁の領域及び各駆動コイルのパターン形成位置が設定されている。
【００２０】
したがって、各駆動コイルにそれぞれ駆動電流が供給されると、各駆動電流の大きさ及び極性に応じて駆動コイル体８，９に駆動力が発生し、レンズホルダー４が各駆動電流の大きさ及び極性に応じて駆動される。
【００２１】
すなわち、フォーカスコイル１０はレンズホルダー４の側面の中央に配置されると共に、上下を二分して相違する磁極からの磁界内に配置されていることによりフォーカスコイル１０にフォーカスエラー信号の駆動電流が供給されると、レンズホルダー４は対物レンズ７の光軸方向のフォーカス方向に駆動される。
【００２２】
また、トラッキングコイル１１ａ，１１ｂはフォーカスコイル１０の一方側の脇に縦に並んで配置されると共に、左右を二分して相違する磁極からの磁界内に配置され、かつ各トラッキングコイル１１ａ，１１ｂ同士が互いに逆向きに巻回されていると共に、各トラッキングコイル１１ａ，１１ｂが互いに相違する磁極からの磁界内に配置していることによりトラッキングコイル１１ａ，１１ｂにトラッキングエラー信号の駆動電流が供給されると、レンズホルダー４は対物レンズ７の光軸と直交する方向のトラッキング方向に駆動される。
【００２３】
また、チルトコイル１２はフォーカスコイル１０の他方側の脇にレンズホルダー４の側面の中央から外れて配置されると共に、上下を二分して相違する磁極からの磁界内に配置されていることによりチルトコイル１２にチルトエラー信号の駆動電流が供給されると、レンズホルダー４は対物レンズ７の光軸を傾ける方向のチルト方向に駆動される。
【００２４】
ここで、各駆動コイル１０，１１ａ，１１ｂ，１２は各駆動コイル体８，９の各プリント基板の両面に設けられており、パターン位置及び巻回方向が各プリント基板の両面に面対称に形成されているので、各駆動電流に対して各プリント基板の両面で同一方向の駆動力が発生する。
【００２５】
また、各永久磁石２，３及び各駆動コイル体８，９は対物レンズ７の光軸を中心にして線対称に設定されていると共に、フォーカスコイル１０は正相に接続され、トラッキングコイル１１ａ，１１ｂ及びチルトコイル１２は逆相に接続されており、フォーカスコイル１０及びトラッキングコイル１１ａ，１１ｂに供給される各駆動電流に対して各駆動コイル体８，９で同一方向の駆動力が発生し、チルトコイル１２に供給される駆動電流に対して各駆動コイル体８，９で逆方向の駆動力が発生する。
【００２６】
各駆動コイル体８，９において各チルトコイル１２は対物レンズ７の光軸を中心にして線対称に配置されているので、各駆動コイル体８，９で逆方向の駆動力が発生されることによりレンズホルダー４が傾けられ、チルト制御が行われる。
【００２７】
ところで、レンズホルダー４の対物レンズ７の取付面と逆側の底面側には中央に光路用の透孔１９が形成される連結基板１８が設置され、この連結基板１８により各駆動コイル体８，９は連結されている。
【００２８】
各駆動コイル体８，９及び連結基板１８にはそれぞれ接合部分にランド領域１９及び２０が形成されており、これらのランド領域１９及び２０がハンダ付けされることで連結基板１８により各駆動コイル体８，９同士が連結される。
【００２９】
この連結基板１８による各駆動コイル体８，９同士の連結により各駆動コイル体８，９の同種の各駆動コイル同士が正しい極性に接続される。
【００３０】
また、各支持ワイヤー１３の各一端が固定される固定基板１６から遠い位置にある駆動コイル体８には、図６に示し如く、各支持ワイヤー１３の各他端が突き当てられる部分にランド領域２２が形成されており、このランド領域２２に各支持ワイヤー１３の各他端をそれぞれハンダ付けすることで各支持ワイヤー１３と前記駆動コイル体８との連結が行われる。
【００３１】
これにより供給側となる所定の３本の各支持ワイヤー１３を介して駆動コイル体８の各駆動コイル１０，１１ａ，１１ｂ，１２にそれぞれ対応する各種駆動電流が供給され、その後、連結基板１８を介してもう一方の駆動コイル体９の各駆動コイル１０，１１ａ，１１ｂ，１２にそれぞれ対応する各種駆動電流が供給される。そして、この駆動コイル体９の各駆動コイル１０，１１ａ，１１ｂ，１２を流れた各種駆動電流は連結基板１８を介し、各支持ワイヤー１３がハンダ付けされる駆動コイル体８を中継して供給側とは別の３本の各支持ワイヤー１３を介して導出される。
【００３２】
このように連結基板１８を介して各駆動コイル体８，９の各駆動コイル１０，１１ａ，１１ｂ，１２同士が連結されており、かつ一方の駆動コイル体８を中継して各駆動コイル体８，９の各駆動コイル１０，１１ａ，１１ｂ，１２は各支持ワイヤー１３に連結されている。
【００３３】
ところで、連結基板１８はレンズホルダー４の対物レンズ７の取付面と逆側の底面側に設置されている。その為、レンズホルダー４の底面側に連結基板１８の重さ及び連結に用いられるハンダの重さが加わって連結基板１８が設置されていない状態において対物レンズ７の取付面側に片寄っているレンズホルダー４の重心が中央に近づけられ、レンズホルダー４の重量バランスが良好となる。
【００３４】
しかも、各駆動コイル体８，９の底辺側を連結基板１８により接続すると共に、この連結基板１８をレンズホルダー４の底面に設置しているので、レンズホルダー４の剛性向上が図れる。
【００３５】
【発明の効果】
以上述べた如く、本発明によれば、レンズホルダーの対物レンズの取付面と逆側の底面側に連結基板を設置して各駆動コイル体を連結しているので、レンズホルダーの重量バランスが良好となり、ローリング発生の抑制を図った対物レンズ駆動装置が提供できる。
【００３６】
また、連結基板の設置により各駆動コイル体間及びレンズホルダーが底面側で連結されるので、剛性向上が図れ、高次共振に有利となる。
【図面の簡単な説明】
【図１】本発明に係る対物レンズ駆動装置の一例の完成状態を示す斜視図である。
【図２】図１の対物レンズ駆動装置のフレーム部分を除いた展開斜視図である。
【図３】図１の対物レンズ駆動装置のフレーム部分を除いた図２とは別角度から示す展開斜視図である。
【図４】各永久磁石５，６の着磁を説明する説明図である。
【図５】永久磁石５，６の着磁の領域と駆動コイル体８，９の各駆動コイルのパターンとの位置関係を説明する説明図である。
【図６】各支持ワイヤー１３の各先端を駆動コイル体８に接続することを説明する説明図である。
【符号の説明】
１ フレーム
２，３ ヨーク
４ レンズホルダー
５，６ 永久磁石
７ 対物レンズ
８，９ 駆動コイル体
１０ フォーカシングコイル
１１ａ，１１ｂ トラッキングコイル
１２ チルトコイル
１３ 支持ワイヤー
１８ 連結基板[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an objective lens driving device in which a lens holder to which an objective lens is attached is elastically supported so as to be displaceable on a frame, and in particular, an objective in which a pair of drive coil bodies attached to the lens holder are coupled. The present invention relates to a lens driving device.
[0002]
[Prior art]
As is well known, in an objective lens driving device in an optical head that optically reads or writes a signal on a signal recording medium such as a disk, the lens holder to which the objective lens is attached can be displaced with respect to the frame. The driving coil body such as a focusing coil and a tracking coil is mounted on the lens holder, and the used portion of the driving coil body is disposed within a predetermined magnetic field formed by a magnetic circuit. The objective lens is driven in accordance with a signal supplied to.
[0003]
By the way, in the objective lens driving device, the objective lens is arranged at the center of the lens holder, and a pair of magnets forming a magnetic circuit are arranged opposite to each other with the lens holder interposed therebetween, and a pair opposed to each of these magnets. In many cases, the drive coil body is mounted on the lens holder, and the lens holder and the magnetic circuit are symmetrically configured with the objective lens as the center so that good characteristics can be obtained.
[0004]
By the way, a pair of drive coil bodies are arranged on both sides of the lens holder, and each drive coil body has a focusing coil, a tracking coil, or a tilt coil, so the same type of coils of each drive coil body are electrically connected to each other. When the drive coil body uses general windings, the same type of coils are wound continuously.
[0005]
On the other hand, there is known an objective lens driving device in which a driving coil body is configured by a printed board on which a printed coil is formed as a pattern (see, for example, Patent Document 1).
[0006]
In an objective lens driving device in which such a drive coil body is configured by a printed board, the same type of coil cannot be continued by winding, so the printed boards of each drive coil body are connected by a connecting board. .
[0007]
[Patent Document 1]
JP 2002-150584 A
[Problems to be solved by the invention]
By the way, in the objective lens driving device in which the printed circuit boards of the drive coil bodies are connected to each other by the connection board, the connection board is conventionally attached to the side surface of the lens holder as shown in Patent Document 1 described above.
[0009]
For this reason, there is a problem that the weight balance of the lens holder is poor and rolling is likely to occur. In particular, the connecting substrate is connected to the printed circuit board of each drive coil body by soldering. However, the influence of the weight of the solder is large, and the weight balance of the lens holder is deteriorated.
[0010]
[Means for Solving the Problems]
The present invention includes a pair of drive coil bodies mounted on the lens holder so as to face a pair of magnets arranged opposite to each other on both sides of the lens holder, and a connection board separate from each drive coil body. The lens holder is installed on the bottom surface side opposite to the mounting surface of the objective lens, and the drive coil bodies are connected to each other by soldering by the connection substrate . As a result, the drive coil bodies are connected to each other, the center of gravity of the lens holder that is offset to the mounting surface side of the objective lens is brought closer to the center when no connection substrate is installed , and the rigidity of the lens holder is improved. The
[0011]
【Example】
FIG. 1 is a perspective view showing a completed state of an example of the objective lens driving device according to the present invention, FIG. 2 is a developed perspective view of the objective lens driving device of FIG. 1 excluding the frame portion, and FIG. FIG.
[0012]
In the frame 1, yokes 2 and 3 are integrally formed by sheet metal processing of a soft iron metal plate, and a pair of permanent magnets 5 and 6 are arranged on the yokes 2 and 3 so as to face each other with the lens holder 4 interposed therebetween. Each is attached.
[0013]
An objective lens 7 is attached to the upper surface of the lens holder 4, and drive coil bodies 8 and 9 are attached to the side surfaces of the lens holder 4 facing the permanent magnets 5 and 6 by adhesive fixing.
[0014]
As shown in the figure, the drive coil bodies 8 and 9 are each composed of a printed circuit board on which a focus coil 10, tracking coils 11a and 11b, and a tilt coil 12 are formed as a pattern of a print coil, and each of these drive coils 10 and 11a. , 11b, 12 are formed symmetrically on both sides of each printed circuit board.
[0015]
On each side surface adjacent to each mounting surface of the drive coil bodies 8 and 9 of the lens holder 4, there are formed protrusions 14 that are bonded and fixed to three support wires 13 that are arranged parallel to each other on each side surface. One end of each of the six support wires 13, three on each side of the lens holder 4, is fixed to a fixed substrate 16 fixed together with the auxiliary member 15 to the cut-and-raised portion 1 a of the frame 1. Yes.
[0016]
Accordingly, the lens holder 4 is elastically supported by the six support wires 13 so as to be displaceable in the focus direction and the tracking direction.
[0017]
The other end of each of the six support wires 13 that is not the end fixed to the fixed substrate 16 is abutted against one coil body 8 and is soldered to a predetermined support wire 13 and a predetermined drive coil body 8. Are connected to each other.
[0018]
Further, each hole 17 through which the left and right support wires 13 of the auxiliary member 15 are penetrated is filled with a dumping agent so that each support wire 13 is damped.
[0019]
The permanent magnets 5 and 6 are magnetized so as to be divided into four regions in the plane direction as shown in FIG. 4, and the drive coil bodies 8 and 9, the focus coil 10, the tracking coils 11a and 11b, and the tilt. As shown in FIG. 5, the positional relationship with the coil 12 is such that the magnetization areas of the permanent magnets 5 and 6 and the pattern formation positions of the drive coils are set so that each drive coil is divided into two.
[0020]
Therefore, when a drive current is supplied to each drive coil, a drive force is generated in the drive coil bodies 8 and 9 according to the magnitude and polarity of each drive current, and the lens holder 4 Driven according to polarity.
[0021]
That is, the focus coil 10 is arranged at the center of the side surface of the lens holder 4 and is arranged in a magnetic field from different magnetic poles by dividing the upper and lower sides, whereby a focus error signal drive current is supplied to the focus coil 10. Then, the lens holder 4 is driven in the focus direction in the optical axis direction of the objective lens 7.
[0022]
The tracking coils 11a and 11b are arranged vertically next to one side of the focus coil 10, are arranged in a magnetic field from different magnetic poles by dividing the left and right, and the tracking coils 11a and 11b are connected to each other. Are wound in opposite directions, and the tracking coils 11a and 11b are arranged in magnetic fields from different magnetic poles, whereby a tracking error signal drive current is supplied to the tracking coils 11a and 11b. Then, the lens holder 4 is driven in a tracking direction perpendicular to the optical axis of the objective lens 7.
[0023]
Further, the tilt coil 12 is disposed on the other side of the focus coil 10 so as to be off the center of the side surface of the lens holder 4, and is tilted by being disposed in magnetic fields from different magnetic poles by dividing the upper and lower sides into two. When a drive current of a tilt error signal is supplied to the coil 12, the lens holder 4 is driven in a tilt direction in which the optical axis of the objective lens 7 is tilted.
[0024]
Here, each drive coil 10, 11a, 11b, 12 is provided on both surfaces of each printed circuit board of each drive coil body 8, 9, and the pattern position and winding direction are formed symmetrically on both surfaces of each printed circuit board. Therefore, a driving force in the same direction is generated on both sides of each printed circuit board for each driving current.
[0025]
The permanent magnets 2 and 3 and the drive coil bodies 8 and 9 are set to be symmetrical with respect to the optical axis of the objective lens 7, and the focus coil 10 is connected in the positive phase, and the tracking coils 11a, 11b and the tilt coil 12 are connected in opposite phases, and a driving force in the same direction is generated in each drive coil body 8, 9 for each drive current supplied to the focus coil 10 and the tracking coils 11a, 11b. A driving force in the opposite direction is generated in each of the drive coil bodies 8 and 9 with respect to the drive current supplied to the tilt coil 12.
[0026]
In each drive coil body 8, 9, each tilt coil 12 is arranged symmetrically about the optical axis of the objective lens 7, so that a drive force in the opposite direction is generated in each drive coil body 8, 9. Thus, the lens holder 4 is tilted, and tilt control is performed.
[0027]
By the way, on the bottom surface side opposite to the mounting surface of the objective lens 7 of the lens holder 4, a connecting substrate 18 having an optical path through hole 19 formed in the center is installed. 9 are connected.
[0028]
Land regions 19 and 20 are formed at the joint portions of the drive coil bodies 8 and 9 and the connecting board 18, respectively, and the land areas 19 and 20 are soldered so that the driving coil bodies are driven by the connecting board 18. 8, 9 are connected to each other.
[0029]
By connecting the drive coil bodies 8 and 9 to each other by the connection board 18, the same drive coils of the drive coil bodies 8 and 9 are connected to each other with the correct polarity.
[0030]
Further, as shown in FIG. 6, the drive coil body 8 at a position far from the fixed substrate 16 to which each end of each support wire 13 is fixed has a land region at a portion where each other end of each support wire 13 is abutted. 22 is formed, and each support wire 13 and the drive coil body 8 are connected to each other by soldering each other end of each support wire 13 to the land region 22.
[0031]
As a result, various drive currents respectively corresponding to the drive coils 10, 11 a, 11 b, and 12 of the drive coil body 8 are supplied via the predetermined three support wires 13 on the supply side. Various drive currents respectively corresponding to the drive coils 10, 11 a, 11 b, 12 of the other drive coil body 9 are supplied. Various drive currents flowing through the drive coils 10, 11 a, 11 b, and 12 of the drive coil body 9 are relayed through the connection substrate 18 to the drive coil body 8 to which the support wires 13 are soldered and supplied to the supply side It is derived | led-out via each three support wires 13 different from.
[0032]
In this way, the drive coils 10, 11 a, 11 b, 12 of the drive coil bodies 8, 9 are connected to each other via the connection substrate 18, and each drive coil body 8 is relayed through one drive coil body 8. , 9 are connected to the support wires 13.
[0033]
By the way, the connecting substrate 18 is installed on the bottom surface side opposite to the mounting surface of the objective lens 7 of the lens holder 4. For this reason, the weight of the connecting substrate 18 and the weight of the solder used for the connection are added to the bottom surface side of the lens holder 4, and the lens is offset toward the mounting surface side of the objective lens 7 in a state where the connecting substrate 18 is not installed. The center of gravity of the holder 4 is brought closer to the center, and the weight balance of the lens holder 4 is improved.
[0034]
In addition, since the bottom sides of the drive coil bodies 8 and 9 are connected by the connecting board 18 and the connecting board 18 is installed on the bottom surface of the lens holder 4, the rigidity of the lens holder 4 can be improved.
[0035]
【The invention's effect】
As described above, according to the present invention, since the connecting substrate is installed on the bottom side opposite to the mounting surface of the objective lens of the lens holder and the drive coil bodies are connected, the weight balance of the lens holder is good. Thus, it is possible to provide an objective lens driving device that suppresses the occurrence of rolling.
[0036]
In addition, since the drive coil bodies and the lens holder are connected on the bottom side by installing the connection substrate, the rigidity can be improved, which is advantageous for higher-order resonance.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a completed state of an example of an objective lens driving device according to the present invention.
2 is a developed perspective view of the objective lens driving device of FIG. 1 with a frame portion removed.
3 is a developed perspective view showing an angle different from that of FIG. 2 except for a frame portion of the objective lens driving device of FIG. 1;
FIG. 4 is an explanatory diagram for explaining magnetization of each permanent magnet 5 and 6;
FIG. 5 is an explanatory diagram for explaining the positional relationship between the magnetized regions of the permanent magnets 5 and 6 and the patterns of the drive coils of the drive coil bodies 8 and 9;
FIG. 6 is an explanatory view for explaining that each tip of each support wire 13 is connected to the drive coil body 8;
[Explanation of symbols]
1 Frame 2, 3 Yoke 4 Lens holder 5, 6 Permanent magnet 7 Objective lens 8, 9 Drive coil body 10 Focusing coil 11 a, 11 b Tracking coil 12 Tilt coil 13 Support wire 18 Connecting substrate

Claims (3)

対物レンズが取り付けられるレンズホルダーがフレームに変位可能に弾性的に支持される対物レンズ駆動装置であって、前記レンズホルダーを挟んだ両側に対向配置された一対の磁石と、これらの各磁石にそれぞれ対向するべく前記レンズホルダーに装着される一対の駆動コイル体とを備え、各駆動コイル体とは別体の連結基板を前記レンズホルダーの対物レンズの取付面と逆側の底面側に設置して前記連結基板により前記各駆動コイル体とをハンダ付けにより連結したことを特徴とする対物レンズ駆動装置。An objective lens driving device in which a lens holder to which an objective lens is attached is elastically supported so as to be displaceable on a frame, and a pair of magnets arranged opposite to each other across the lens holder, and each of these magnets and a pair of drive coil body which is mounted on the lens holder so as to face, the respective drive coil body by installing a connection substrate separate on the bottom side of the mounting surface and opposite side of the objective lens of the lens holder An objective lens driving device, wherein the driving coil bodies are connected to each other by soldering with the connecting substrate . 前記駆動コイル体はプリントコイルがパターンとして形成されるプリント基板により構成されることを特徴とする請求項１記載の対物レンズ駆動装置。2. The objective lens driving device according to claim 1, wherein the driving coil body is constituted by a printed board on which a printed coil is formed as a pattern. レンズホルダーは複数のサスペンションワイヤーによってフレームに対して変位可能に支持され、前記各サスペンションワイヤーの先端を駆動コイル体を構成する一方のプリント基板に直接ハンダ付けすることを特徴とする請求項２記載の対物レンズ駆動装置。The lens holder is supported by a plurality of suspension wires so as to be displaceable with respect to the frame, and the tip of each suspension wire is soldered directly to one printed circuit board constituting the drive coil body. Objective lens drive.
JP2003172164A 2003-06-17 2003-06-17 Objective lens drive Expired - Fee Related JP4111879B2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2003172164A JP4111879B2 (en) 2003-06-17 2003-06-17 Objective lens drive
CNB2004100064584A CN1259658C (en) 2003-06-17 2004-03-08 Field lens driving device
KR1020040018145A KR100548920B1 (en) 2003-06-17 2004-03-17 Driving apparatus for objective lens
TW093117124A TWI256043B (en) 2003-06-17 2004-06-15 Driving apparatus for objective lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003172164A JP4111879B2 (en) 2003-06-17 2003-06-17 Objective lens drive

Publications (2)

Publication Number Publication Date
JP2005011402A JP2005011402A (en) 2005-01-13
JP4111879B2 true JP4111879B2 (en) 2008-07-02

Family

ID=34096398

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2003172164A Expired - Fee Related JP4111879B2 (en) 2003-06-17 2003-06-17 Objective lens drive

Country Status (4)

Country Link
JP (1) JP4111879B2 (en)
KR (1) KR100548920B1 (en)
CN (1) CN1259658C (en)
TW (1) TWI256043B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7944798B2 (en) * 2005-08-26 2011-05-17 Panasonic Corporation Objective lens unit, optical pickup, and optical information device having ultraviolet-transmissive lens holder
JP4726694B2 (en) * 2006-05-12 2011-07-20 三洋電機株式会社 Objective lens drive
US7602562B2 (en) * 2007-05-21 2009-10-13 Electro Scientific Industries, Inc. Fluid counterbalance for a laser lens used to scribe an electronic component substrate

Also Published As

Publication number Publication date
KR100548920B1 (en) 2006-02-02
KR20040108535A (en) 2004-12-24
CN1573963A (en) 2005-02-02
TWI256043B (en) 2006-06-01
TW200501128A (en) 2005-01-01
CN1259658C (en) 2006-06-14
JP2005011402A (en) 2005-01-13

Similar Documents

Publication Publication Date Title
JP3822434B2 (en) Objective lens drive
JP4693510B2 (en) Objective lens drive
US20020054559A1 (en) Optical pickup actuator
JP2004005813A (en) Optical head device and optical reproducing device using the same
EP2136365B1 (en) High-sensitivity pickup actuator for disc drive
JP2003228860A (en) Objective lens driving device
JP2010073225A (en) Objective lens drive unit and disk device using the same
JP4111879B2 (en) Objective lens drive
JP2004326885A (en) Objective lens driving device of optical head
JP3872237B2 (en) Lens drive device
JP2007018573A (en) Objective driving device
JP2005011439A (en) Objective lens driving device
JP2002092916A (en) Objective lens drive device of optical pickup
JP2005251358A (en) Objective lens driving device, and optical head device provided therewith
JPH09219031A (en) Objective lens driving device
JP2002245647A (en) Object lens driving device
JP3490925B2 (en) Objective lens drive
JP4726694B2 (en) Objective lens drive
JP2007164879A (en) Objective lens driving device
JP2005327326A (en) Objective lens driving apparatus
KR19990057681A (en) Objective lens driving device for optical pickup
JP2000163769A (en) Optical system driving device
JP2697007B2 (en) Objective lens actuator
JP2576481Y2 (en) Drive device for optical pickup actuator
JP2003091842A (en) Objective lens driving device, optical pickup device and optical disk device

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20051128

RD01 Notification of change of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7421

Effective date: 20051226

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20070801

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20070821

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20071018

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20080311

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20080408

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110418

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120418

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130418

Year of fee payment: 5

LAPS Cancellation because of no payment of annual fees