JPS62117169A - Head scanning device - Google Patents

Head scanning device

Info

Publication number
JPS62117169A
JPS62117169A JP60256619A JP25661985A JPS62117169A JP S62117169 A JPS62117169 A JP S62117169A JP 60256619 A JP60256619 A JP 60256619A JP 25661985 A JP25661985 A JP 25661985A JP S62117169 A JPS62117169 A JP S62117169A
Authority
JP
Japan
Prior art keywords
coil
head
thickness
permanent magnet
yoke
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
JP60256619A
Other languages
Japanese (ja)
Inventor
Makoto Yomo
誠 四方
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.)
Canon Inc
Original Assignee
Canon 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 Canon Inc filed Critical Canon Inc
Priority to JP60256619A priority Critical patent/JPS62117169A/en
Publication of JPS62117169A publication Critical patent/JPS62117169A/en
Pending legal-status Critical Current

Links

Landscapes

  • Facsimile Scanning Arrangements (AREA)
  • Moving Of Heads (AREA)

Abstract

PURPOSE:To miniaturize and strengthen an electromagnetic coil part by forming in one body an electromagnetic coil and a substrate when the substrate of a head device is molded. CONSTITUTION:Since a coil 13 is formed in one body with the substrate 1c of an optical head 1, the thickness of the coil part, especially the thickness of a part 13a arranged between a permanent magnet 11 and a yoke 10 is formed in almost the same thickness as an air-core coil. Moreover, since its strength is improved remarkably compared with that of the air-core coil, the occurrence of an undesirable driving characteristic, such as a resonance in a driving time can be prevented. Also, since the thickness of the part 13a is narrow, a cavity between the yoke 10 and the permanent magnet 11 can be set in small, and the size of the permanent magnet 11 to obtain the same level of electromagnetic force can be made small than the coil in which a conventional core is used. Thereby, a magnetic circuit 7, furthermore, the whole of a device can be miniaturized and lightened.

Description

【発明の詳細な説明】 [産業上の利用分野] 本発明はヘッド走査装置、特に磁気的あるいは光学的に
記録再生を行なう磁気ヘッドや光学ヘッド、インクなど
を用いて物理的に記録を行なう記録ヘッド、あるいは所
定の材料を加工する加工ヘッドなどの各種のヘッド装置
を直線的あるいは所定の曲線に沿って走査させるヘッド
走査装置に関するものである。
[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a head scanning device, particularly a magnetic head or optical head that performs recording and reproduction magnetically or optically, a recording system that physically performs recording using ink, etc. The present invention relates to a head scanning device that scans a head or various head devices such as a processing head for processing a predetermined material linearly or along a predetermined curve.

[従来の技術] この種のヘッド走査装置として、第3図に示すような光
学ヘッドを71磁気力を用いて走査させる装置が知られ
ている。
[Prior Art] As a head scanning device of this type, a device as shown in FIG. 3 that scans an optical head using magnetic force 71 is known.

このような走査装置は、円板状の光ディスクの記録トラ
ックに沿ってディスクの半径方向に高速でヘッド走査を
行なうために用いられる。
Such a scanning device is used to perform head scanning at high speed in the radial direction of the disc along the recording track of a disc-shaped optical disc.

光学へラドlは光源、光検出器あるいはビームスプリッ
タなど不図示の光学素子を有し、記録走査を行なうため
の対物レンズ2を光軸方向及びディスク半径方向(矢印
で図示)の両方に移動させるアクチュエータ3をその−
E面に有している。
The optical helad l has optical elements (not shown) such as a light source, a photodetector, or a beam splitter, and moves an objective lens 2 for recording scanning both in the optical axis direction and in the disk radial direction (indicated by arrows). Actuator 3
It is on the E side.

光学ヘッド1には貫通穴1a、lbが設けられ、これら
の貫通穴にはL字型の基台4に固定されたガイド軸5.
6が貫通し、ヘッドlはこれらのガイド軸5,6に沿っ
て不図示の光ディスクの半径方向に搏動自在となってい
る。
The optical head 1 is provided with through holes 1a and 1b, and a guide shaft 5. is fixed to an L-shaped base 4 in these through holes.
6 passes through the optical disc, and the head l can freely swing along these guide shafts 5 and 6 in the radial direction of the optical disc (not shown).

光学へラドlを移動させるための駆動力は磁気回路7と
光学ヘッドlに固定されたコイル12の間の゛電磁気力
として発生される。即ち、基台4には符号8〜10で示
された軟鉄などのブロンク材料を接合してUの字型また
は口の字型に形成されたヨークが固定されている。Uの
字型(あるいは口の字型)のヨークの内側には永久磁石
11がヨークに対して固定されており、これらのヨーク
と永久磁石により磁気回路7が形成される。一方、光学
へラド1の下面にはヨーク10よりも僅かに大きな形状
に巻かれたコイル12が固定されている。コイル12は
前記のヨーク10によって貫通されている。ヨーク10
を永久磁石11の間隙には通常1oooないし5000
ガウス程度の磁束密度で磁束を発生させておき、コイル
12に電流を流すことによりコイル12と磁気回路7間
の電磁気力によりヘッドlをガイドレール5,6に沿っ
て移動することができる。
The driving force for moving the optical head l is generated as an electromagnetic force between the magnetic circuit 7 and the coil 12 fixed to the optical head l. That is, fixed to the base 4 are yokes indicated by reference numerals 8 to 10, which are formed into a U-shape or an open-shape by joining bronc materials such as soft iron. A permanent magnet 11 is fixed to the inside of the U-shaped (or mouth-shaped) yoke, and a magnetic circuit 7 is formed by these yokes and the permanent magnets. On the other hand, a coil 12 wound in a shape slightly larger than the yoke 10 is fixed to the lower surface of the optical helad 1. The coil 12 is penetrated by the yoke 10 described above. yoke 10
The gap between the permanent magnets 11 is usually 100 to 5000
By generating a magnetic flux with a magnetic flux density of about Gauss and passing a current through the coil 12, the head l can be moved along the guide rails 5 and 6 by the electromagnetic force between the coil 12 and the magnetic circuit 7.

[発明が解決しようとする問題点] ところで、コイル12はボビンなどの心材に巻かれるも
のと、心材を用いない空心のものが用いられる。従来で
は、これらのコイルを接着、ビスl!めなどの方法で光
学へラド1に固定する。ボビンなどの心材を有するコイ
ルに対して、空心のコイルはフィルの厚さを最小限にで
き、これによってヨーク10と永久磁石11の間隙を狭
くでき、コイル12を横切る磁束密度を高めることがで
きる。従って、所定の駆動力を得るために必要な永久磁
石11の厚みが薄くてすみ、磁気回路7を小型かつ安価
に製造することが可能となる。
[Problems to be Solved by the Invention] The coil 12 may be wound around a core material such as a bobbin, or may be air-core without a core material. Conventionally, these coils were glued together and screwed together! Fix it to the optical heald 1 using a method such as screwing. Compared to a coil with a core material such as a bobbin, an air-core coil can minimize the fill thickness, thereby narrowing the gap between the yoke 10 and the permanent magnet 11 and increasing the magnetic flux density across the coil 12. . Therefore, the thickness of the permanent magnet 11 necessary to obtain a predetermined driving force can be reduced, and the magnetic circuit 7 can be manufactured in a small size and at low cost.

しかし、一般に空心コイルを用いる場合には接着剤でコ
イルを固めたとしても強度不足が生じやすく、ヘッドを
駆動する際に共振によってヘッド走査時に発振がおこり
、制御が行なえなくなる可能性がある。逆にボビンなど
の心材に巻かれたコイルは充分な強度を得ることができ
るが、ボビンの分だけヨーク10と永久磁石11との間
隙を広くせざるを得ず、従ってコイル位置の磁束′#′
度を高めるために磁気回路が大型化し、またコストアッ
プすると言う問題があった。
However, when an air-core coil is generally used, even if the coil is hardened with adhesive, it tends to be insufficient in strength, and when the head is driven, resonance may cause oscillation during head scanning, which may result in loss of control. On the other hand, a coil wound around a core material such as a bobbin can obtain sufficient strength, but the gap between the yoke 10 and the permanent magnet 11 must be widened by the bobbin, and therefore the magnetic flux at the coil position is ′
In order to increase the magnetic field strength, the magnetic circuit becomes larger and the cost increases.

[問題点を解決するための手段] 以上の問題を解決するため、本発明においては固定され
た磁気回路と、走査を行なうヘッド装置に設けられた電
磁コイル間の電磁気力によりヘー。
[Means for Solving the Problems] In order to solve the above problems, the present invention uses electromagnetic force between a fixed magnetic circuit and an electromagnetic coil provided in a head device that performs scanning.

ド装首を走査させるヘッド走査装置において、前記ヘッ
ド装置の基体成形時に前記電磁コイルを基体に一体形成
した構成を採用した。
In a head scanning device that scans a head-mounted device, a configuration is adopted in which the electromagnetic coil is integrally formed on the base body when the base body of the head device is molded.

[作 用] 以北の構成によれば、ヘッド装置の成形時に電磁コイル
を一体形成してしまうことができるので、別体のコイル
をヘット装置と結合する方法に比べて製造が容易であり
、しかもコイルの強度がヘッド装置はの基体により保証
されるため、共振によるヘッドの発振などの好ましくな
い駆動特性を除去できる。しかもコイルの厚みを最小限
に抑えることができるため、磁気回路の間隙を狭くし、
磁気効率を高めることによって結局磁気回路全体を小型
に形成することが可能となる。
[Function] According to the configuration described above, since the electromagnetic coil can be integrally formed when molding the head device, manufacturing is easier compared to a method in which a separate coil is combined with the head device. Moreover, since the strength of the coil is guaranteed by the base of the head device, undesirable drive characteristics such as head oscillation due to resonance can be eliminated. Moreover, since the thickness of the coil can be minimized, the gap in the magnetic circuit can be narrowed,
By increasing the magnetic efficiency, it becomes possible to make the entire magnetic circuit smaller.

[実施例] 以下、図面に示す実施例に基づき本発明の詳細な説明す
る。但し、以下では従来例の項で示したものと同様の光
学ヘッド走査装置を実施例として示し、従来例と同一ま
たは相当する部材については、同様の符号を付し、その
詳細な説明は省略する。
[Example] Hereinafter, the present invention will be described in detail based on the example shown in the drawings. However, in the following, an optical head scanning device similar to that shown in the conventional example section will be shown as an example, and the same reference numerals will be given to the same or equivalent members as in the conventional example, and detailed explanation thereof will be omitted. .

第1図において光学ヘッド1の基体ICはプラスチック
材料のモールド成形により構成する。未実施例において
は、基体ICをモールド成形する際ヨーク10の外径よ
りも僅かに大きく巻かれたコイル13を金型に入れてお
き、ここに流動状態のプラスチック材料を注型して硬化
させる。
In FIG. 1, a base IC of an optical head 1 is constructed by molding a plastic material. In the unembodied example, when molding the base IC, a coil 13 wound slightly larger than the outer diameter of the yoke 10 is placed in a mold, and a plastic material in a fluid state is poured into the mold and hardened. .

以J二のようにして、第2図の断面図に示されるように
プラスチック材料がコイル13の線材と線材の間に充填
され、ヘッド1に対してコイル13が一体成形される。
In the following manner, a plastic material is filled between the wires of the coil 13, as shown in the sectional view of FIG. 2, and the coil 13 is integrally molded with the head 1.

コイル13の線材間にプラスチック材料が充填されるの
で、同じ巻数の空心コイルに比べ2僅かにコイル部分の
形状が大きくなるが、その強度は大幅に向上する。
Since the plastic material is filled between the wires of the coil 13, the shape of the coil portion becomes slightly larger by 2 compared to an air-core coil with the same number of turns, but its strength is greatly improved.

コイル線材の被膜には、モールド時の高熱に酎えること
ができるように、耐熱性の高い材料を用いるのが好まし
い0例えばポリイミド樹脂を用いれば連続で220℃以
上の高温環境下でも使用可能なため、基体1cの材料と
してほとんどのプラスチック材料を用いることができる
。例えばガラス繊維入りのエポキシ樹脂の成形温度は1
48〜164°Cであるから、ポリイミド樹脂を用いれ
ば充分な耐熱性を得ることができる。
It is preferable to use a material with high heat resistance for the coating of the coil wire so that it can withstand the high heat during molding. For example, if polyimide resin is used, it can be used continuously in a high temperature environment of 220 ° C or more. Therefore, most plastic materials can be used as the material for the base body 1c. For example, the molding temperature for epoxy resin containing glass fiber is 1
Since the temperature is 48 to 164°C, sufficient heat resistance can be obtained by using polyimide resin.

以上のような構成によれば、光学へラド1の基体ICに
コイル13が一体成形されるので、第2図に見るように
コイル部分の厚み、特に永久磁石11とヨーク10の間
に配置される部分13aの厚みは空心のコイルとほぼ同
じ程度の厚みとなり、しかもその強度は空心の場合に比
べて大幅に向上しているので、駆動時に共振などの好ま
しくない駆動特性が生じるのを防止できる。また、部分
13aの厚みが狭いので、ヨーク10と永久磁石11の
間隙を小さく設定でき、同一の電磁気力を得るだめの永
久磁石11の大きさは従来の心材を用いるコイルよりも
小さくすることができる。
According to the above configuration, the coil 13 is integrally molded on the base IC of the optical helad 1, so as shown in FIG. The thickness of the portion 13a is approximately the same as that of the air-core coil, and its strength is significantly improved compared to the air-core coil, so that it is possible to prevent undesirable drive characteristics such as resonance from occurring during driving. . Furthermore, since the thickness of the portion 13a is narrow, the gap between the yoke 10 and the permanent magnet 11 can be set small, and the size of the permanent magnet 11 to obtain the same electromagnetic force can be made smaller than that of a coil using a conventional core material. can.

従って、磁気回路7、さらに装置全体を小型軽量化する
ことが可能となる。
Therefore, it is possible to reduce the size and weight of the magnetic circuit 7 and the entire device.

以−Lでは光学ヘッド走査装置に関する実施例を示した
が、以上の構成は磁気ヘッドなどの走査装置あるいは記
録ヘッドの走査装置、加工ヘッドの走査装置など各種の
へ1.ト走査装置などに広く適用することができる。
In the following, an embodiment related to an optical head scanning device has been shown, but the above configuration can be applied to various types of scanning devices such as magnetic heads, recording head scanning devices, processing head scanning devices, etc. It can be widely applied to other types of scanning devices.

[効 果] 以上の説明から明らかなように、未発明によれば、固定
された磁気回路と、走査を行なうヘッド装置に設けられ
た電磁コイル間の電磁気力によりヘッド装置を走査させ
るヘッド走査装置において、前記ヘッド装置の基体成形
時に前記電磁コイルを基体に一体形成した構成を採用し
ているので、iWmコイル部分の小型化及び強化が可能
であり、駆動特性に優れた小型軽量で製造も容易な慢れ
たヘッド走査装置を提供することができる。
[Effect] As is clear from the above description, the present invention provides a head scanning device that causes a head device to scan using electromagnetic force between a fixed magnetic circuit and an electromagnetic coil provided in the head device that performs scanning. Since the electromagnetic coil is integrally formed with the base when molding the base of the head device, it is possible to downsize and strengthen the iWm coil portion, and it is small and lightweight with excellent drive characteristics and easy to manufacture. It is possible to provide an elegant head scanning device.

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

第1図は本発明によるヘッド走査装置の1例として光学
ヘッド走査装置の構成を示した斜視図、第2図は第1図
の装置の一部破断側面図、第3図は従来の光学ヘッド走
査装置の構成を示した斜視図である。 1・・・光学ヘッド   2・・・対物レンズ3・・・
アクチュエータ 5.6・・・ガイド軸7・・・磁気回
路    8〜10・・・ヨーク11・・・永久磁石 
  13・・・コイルIこ 、1.〕乙5
FIG. 1 is a perspective view showing the configuration of an optical head scanning device as an example of a head scanning device according to the present invention, FIG. 2 is a partially cutaway side view of the device in FIG. 1, and FIG. 3 is a conventional optical head. FIG. 2 is a perspective view showing the configuration of a scanning device. 1... Optical head 2... Objective lens 3...
Actuator 5.6...Guide shaft 7...Magnetic circuit 8-10...Yoke 11...Permanent magnet
13... Coil I, 1. ] Otsu 5

Claims (1)

【特許請求の範囲】[Claims] 固定された磁気回路と、走査を行なうヘッド装置に設け
られた電磁コイル間の電磁気力によりヘッド装置を走査
させるヘッド走査装置において、前記ヘッド装置の基体
成形時に前記電磁コイルを基体に一体形成したことを特
徴とするヘッド走査装置。
In a head scanning device that causes the head device to scan by electromagnetic force between a fixed magnetic circuit and an electromagnetic coil provided in the head device that performs scanning, the electromagnetic coil is integrally formed on the base body when molding the base body of the head device. A head scanning device featuring:
JP60256619A 1985-11-18 1985-11-18 Head scanning device Pending JPS62117169A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60256619A JPS62117169A (en) 1985-11-18 1985-11-18 Head scanning device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60256619A JPS62117169A (en) 1985-11-18 1985-11-18 Head scanning device

Publications (1)

Publication Number Publication Date
JPS62117169A true JPS62117169A (en) 1987-05-28

Family

ID=17295133

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60256619A Pending JPS62117169A (en) 1985-11-18 1985-11-18 Head scanning device

Country Status (1)

Country Link
JP (1) JPS62117169A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4946195A (en) * 1988-03-08 1990-08-07 Mazda Motor Corporation Steering assembly supporting construction of a motor vehicle
JPH03127386A (en) * 1989-10-13 1991-05-30 Canon Inc Carriage
JPH03205636A (en) * 1990-01-05 1991-09-09 Canon Inc Optical head device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4946195A (en) * 1988-03-08 1990-08-07 Mazda Motor Corporation Steering assembly supporting construction of a motor vehicle
JPH03127386A (en) * 1989-10-13 1991-05-30 Canon Inc Carriage
JPH03205636A (en) * 1990-01-05 1991-09-09 Canon Inc Optical head device

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