JPH0522921A - Swing type actuator - Google Patents
Swing type actuatorInfo
- Publication number
- JPH0522921A JPH0522921A JP22627091A JP22627091A JPH0522921A JP H0522921 A JPH0522921 A JP H0522921A JP 22627091 A JP22627091 A JP 22627091A JP 22627091 A JP22627091 A JP 22627091A JP H0522921 A JPH0522921 A JP H0522921A
- Authority
- JP
- Japan
- Prior art keywords
- arm
- movable coil
- hole
- protrusion
- holding member
- 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.)
- Granted
Links
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 12
- 230000002093 peripheral effect Effects 0.000 claims abstract description 10
- 238000000465 moulding Methods 0.000 abstract description 3
- 229910000838 Al alloy Inorganic materials 0.000 abstract description 2
- 238000004512 die casting Methods 0.000 abstract 1
- 239000012943 hotmelt Substances 0.000 abstract 1
- 238000002347 injection Methods 0.000 abstract 1
- 239000007924 injection Substances 0.000 abstract 1
- 229920005989 resin Polymers 0.000 description 9
- 239000011347 resin Substances 0.000 description 9
- 238000005452 bending Methods 0.000 description 4
- 238000001746 injection moulding Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229920001225 polyester resin Polymers 0.000 description 2
- 239000004645 polyester resin Substances 0.000 description 2
- 229920000106 Liquid crystal polymer Polymers 0.000 description 1
- 239000004977 Liquid-crystal polymers (LCPs) Substances 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004962 Polyamide-imide Substances 0.000 description 1
- 239000004734 Polyphenylene sulfide Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229920006015 heat resistant resin Polymers 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920002312 polyamide-imide Polymers 0.000 description 1
- -1 polybutylene terephthalate Polymers 0.000 description 1
- 229920001707 polybutylene terephthalate Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000009719 polyimide resin Substances 0.000 description 1
- 229920000069 polyphenylene sulfide Polymers 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は例えば磁気ディスク用ア
クチュエータのような揺動型アクチュエータに関するも
のであり、特に磁気ヘッドのような機能部材が円弧軌跡
を描くように揺動する揺動型（スイング型）アクチュエ
ータに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oscillating actuator such as an actuator for a magnetic disk, and in particular, an oscillating actuator in which a functional member such as a magnetic head oscillates to draw an arc locus. Type) actuator.
【０００２】[0002]
【従来の技術】従来磁気ディスク等の記録トラックに磁
気ヘッドを位置決めするには、図９および図１０に示す
ような揺動型若しくは回転式のアクチュエータが使用さ
れている。両図においてヨーク１には永久磁石２を固着
し、かつ各々極性を異にして対向配置して支柱３によっ
て組立て、空隙部４を介して磁気回路を形成する。５は
アームであり、一端に偏平型の可動コイル６を、他端に
は磁気ヘッド（図示せず）を各々固着し、可動コイル６
が前記空隙部４内に位置するように、軸７を介して回転
揺動自在に配設する。2. Description of the Related Art Conventionally, an oscillating or rotary actuator as shown in FIGS. 9 and 10 has been used to position a magnetic head on a recording track of a magnetic disk or the like. In both figures, a permanent magnet 2 is fixed to a yoke 1, and the magnets are arranged opposite to each other with different polarities, assembled by columns 3, and a magnetic circuit is formed via a gap 4. Reference numeral 5 denotes an arm, which has a flat movable coil 6 fixed to one end and a magnetic head (not shown) fixed to the other end.
Is rotatably and swingably disposed via a shaft 7 so that the space is located in the space 4.
【０００３】そして可動コイル６に信号電流を通電する
と、フレミングの左手の法則に従って可動コイル６に軸
７の回りの駆動力が作用し、アーム５を回転揺動させ、
アーム５に固着した磁気ヘッドを磁気ディスク上の所定
の記録トラックに位置決めするのである。なお回転方向
の切り換えは、コイルへの通電電流の向きを反転させる
ことによって行う。When a signal current is passed through the movable coil 6, a driving force around the shaft 7 acts on the movable coil 6 according to Fleming's left-hand rule, causing the arm 5 to rotate and swing,
The magnetic head fixed to the arm 5 is positioned on a predetermined recording track on the magnetic disk. The rotation direction is switched by reversing the direction of the current flowing through the coil.
【０００４】上記従来の磁気ディスク用アクチュエータ
において、アーム５に可動コイル６を固着する場合には
接着剤を使用するのが一般的である。しかしながら接着
剤による固着作業は煩雑かつ作業性が低いのみならず、
可動コイルの位置決め精度においても不充分であり、信
頼性が低いという問題点がある。また可動コイル６の端
末の処理も煩雑な作業を必要とし、組立作業全体の作業
性を低下させるという問題点も併存する。In the above conventional magnetic disk actuator, an adhesive is generally used when the movable coil 6 is fixed to the arm 5. However, fixing work with an adhesive is not only complicated and low in workability,
There is also a problem that the positioning accuracy of the moving coil is insufficient and the reliability is low. Further, the processing of the terminal of the movable coil 6 also requires complicated work, and there is a problem that the workability of the entire assembling work is deteriorated.
【０００５】更に最近の磁気ディスク装置の分野におけ
る装置の小型化、薄型化、高機能化等に対する要求は一
段と厳しくなってきており、上記可動コイル６の位置決
め精度ならびに接着作業における作業性および信頼性の
向上を図る必要があり、従来構造のものにおいては上記
要求を満足することができないという問題点がある。Further, in recent fields of magnetic disk devices, demands for miniaturization, thinning, high functionality, etc. of the devices have become more severe, and the positioning accuracy of the movable coil 6 and workability and reliability in the bonding work have become more severe. Therefore, there is a problem that the conventional structure cannot satisfy the above requirements.
【０００６】そこで可動コイル６を樹脂モールド成形に
よりアーム５と一体化することが提案されている（例え
ば特開昭63-99756号、実開昭60−159566号公報等参
照）。このような構成により、可動コイル６を保持する
ための構造が簡単になり、しかもかなり薄くすることが
できるので、アクチュエータ全体のコンパクト化に有利
である。Therefore, it has been proposed to integrate the movable coil 6 with the arm 5 by resin molding (see, for example, JP-A-63-99756 and JP-A-60-159566). With such a configuration, the structure for holding the movable coil 6 can be simplified and can be made considerably thin, which is advantageous for downsizing the entire actuator.
【０００７】[0007]
【発明が解決しようとする課題】しかしながら上記従来
の樹脂モールド成形の構造のものにおいては、機械的強
度特に耐引抜力および曲げ強度が不充分であり、あるい
はアーム５と可動コイル６との固着が不充分であるとい
う問題点がある。特にアーム５の可動コイル６側の輪郭
形状が円弧若しくは曲線である場合、更には接合部位が
狭い場合には、充分な機械的強度を確保することが困難
である。However, in the conventional resin mold-molded structure described above, the mechanical strength, particularly the pull-out resistance and the bending strength, is insufficient, or the arm 5 and the movable coil 6 are fixed to each other. There is a problem that it is insufficient. In particular, it is difficult to secure sufficient mechanical strength when the contour shape of the arm 5 on the movable coil 6 side is a circular arc or a curved line, and when the joint portion is narrow.
【０００８】またモールド成形によって可動コイル６を
鋳ぐるむ構成であるため、可動コイル６の上下面にも樹
脂が被着して厚さ寸法が大となり、空隙部４を大にせざ
るを得ない。従って永久磁石２の磁気的性能を充分に発
揮させることができず、アクチュエータとしての特性が
低下し、推力もまた低下するという問題点がある。Further, since the movable coil 6 is cast around by molding, the resin also adheres to the upper and lower surfaces of the movable coil 6 to increase the thickness dimension, and the void 4 must be enlarged. . Therefore, there is a problem that the magnetic performance of the permanent magnet 2 cannot be fully exhibited, the characteristics as an actuator deteriorate, and the thrust also decreases.
【０００９】本発明は、上記従来技術に存在する問題点
を解決し、小型かつ薄型であると共に、高強度のコイル
アーム成形体を有する揺動型アクチュエータを提供する
ことを目的とする。SUMMARY OF THE INVENTION It is an object of the present invention to solve the problems existing in the above-mentioned prior art, and to provide an oscillating type actuator having a compact and thin coil arm molded body with high strength.
【００１０】[0010]
【課題を解決するための手段】上記目的を達成するため
に、本発明においては、対向する１対のヨークの少なく
とも一方に永久磁石を固着し、この永久磁石の表面に磁
気空隙を形成してなるハウジングと、一端に可動コイル
を他端に機能部材を各々固着して揺動自在に形成したア
ームとからなり、前記磁気空隙内に可動コイルを移動自
在に配設して構成した揺動型アクチュエータにおいて、
アームの可動コイル側に貫通穴を有する突起を一体に設
け、熱可塑性樹脂からなり可動コイルの周縁部およびア
ームの突起を抱持するように形成した保持部材により可
動コイルとアームとを一体に接合すると共に、可動コイ
ルの周縁部を抱持する保持部材の厚さ寸法を可動コイル
の厚さ寸法と実質的に同一に形成する、という技術的手
段を採用した。In order to achieve the above object, in the present invention, a permanent magnet is fixed to at least one of a pair of opposed yokes, and a magnetic gap is formed on the surface of the permanent magnet. And a movable coil at one end and a functional member at the other end, respectively, and an arm swingably formed, and the movable coil is movably disposed in the magnetic gap. In the actuator,
A protrusion having a through hole is integrally provided on the movable coil side of the arm, and the movable coil and the arm are integrally joined by a holding member made of a thermoplastic resin and configured to hold the peripheral edge of the movable coil and the protrusion of the arm. At the same time, a technical means is adopted in which the thickness dimension of the holding member that holds the peripheral portion of the movable coil is formed to be substantially the same as the thickness dimension of the movable coil.
【００１１】[0011]
【作用】上記の構成により、小型かつ薄型という特徴を
保持しつつ可動コイルとアームとの固着を完全に行うこ
とができると共に、可動コイルの位置決め精度および信
頼性を向上させ得るのである。With the above construction, the movable coil and the arm can be completely fixed while maintaining the feature of being small and thin, and the positioning accuracy and reliability of the movable coil can be improved.
【００１２】[0012]
【実施例】図１および図２は各々本発明の実施例を示す
要部平面図および要部縦断面図であり、同一部分は前記
図９および図１０と同一の参照符号で示す。両図におい
てアーム５は例えばアルミニウム合金ダイカストにより
形成し、中間部に取付穴８ａを穿設すると共に、一端に
磁気ヘッドのような機能部材（図示せず）装着用の穴８
ｂを、他端（可動コイル６側）に抜け止め用の突起５ａ
を一体に設ける。1 and 2 are a plan view and a longitudinal sectional view of an essential part showing an embodiment of the present invention, respectively, and the same parts are designated by the same reference numerals as those in FIGS. 9 and 10. In both figures, the arm 5 is formed of, for example, an aluminum alloy die-cast, a mounting hole 8a is formed in the middle portion, and a hole 8 for mounting a functional member (not shown) such as a magnetic head is formed at one end.
b to the other end (moving coil 6 side) for preventing protrusion 5a
Are provided integrally.
【００１３】突起５ａは図１に示すように、平面への投
影輪郭を鳩尾（Dovetail) 状に形成し、かつ貫通穴５ｂ
を設ける。次に９は保持部材であり、熱可塑性樹脂から
なり、アーム５と可動コイル６とを一体に接合固着する
ように形成する。すなわち可動コイル６の周縁部および
突起５ａの周囲を抱持するように形成する。従って突起
５ａに設けた貫通穴５ｂ内にも熱可塑性樹脂が充填さ
れ、かつその内面に密着する。As shown in FIG. 1, the projection 5a has a dovetail-shaped projection contour on a plane and has a through hole 5b.
To provide. Next, a holding member 9 is made of a thermoplastic resin and is formed so that the arm 5 and the movable coil 6 are integrally bonded and fixed. That is, it is formed so as to hold the periphery of the movable coil 6 and the periphery of the protrusion 5a. Therefore, the thermoplastic resin is also filled in the through hole 5b provided in the protrusion 5a, and is closely attached to the inner surface thereof.
【００１４】なお可動コイル６の周縁部を抱持する保持
部材９の厚さ寸法と可動コイル６の厚さ寸法とを実質的
に同一に形成する。また可動コイル６は例えば自己融着
電線（心線の最外層に融着被膜を形成した電線）を所定
形状に所定数だけ巻回して多層空心コイルを作り、この
空心コイルに通電し、全体を融着被膜で一体化すること
により製造することができる。The thickness of the holding member 9 that holds the peripheral portion of the movable coil 6 and the thickness of the movable coil 6 are formed to be substantially the same. The movable coil 6 is, for example, a self-fusing electric wire (an electric wire having a fusion coating formed on the outermost layer of the core wire) is wound in a predetermined shape by a predetermined number to form a multilayer air-core coil, and the air-core coil is energized to It can be manufactured by integrating with a fusion coating.
【００１５】上記のようなアーム５と可動コイル６との
一体固着手段としては、例えば射出成形手段が有効であ
る。すなわち予めダイカスト成形したアーム５と、素線
に端子ピン（何れも図示せず）を例えばはんだ付けによ
って結線処理した可動コイル６とを、射出成形用金型中
に挿入して位置決め後、例えばガラス入りポリフェニリ
ンサルファイド樹脂のような熱可塑性樹脂の加熱溶融物
を注入し、冷却固化後金型中から取り出せばよい。上記
射出成形によりアーム５と可動コイル６とは一体に固着
される。As a means for integrally fixing the arm 5 and the movable coil 6 as described above, for example, injection molding means is effective. That is, the arm 5 die-cast in advance and the movable coil 6 in which a terminal pin (neither of which is shown) is connected to the wire by soldering, for example, are inserted into the injection molding die and positioned, and then, for example, glass A heated melt of a thermoplastic resin such as a filled polyphenylene sulfide resin may be injected, cooled and solidified, and then taken out from the mold. The arm 5 and the movable coil 6 are integrally fixed by the injection molding.
【００１６】上記の構成により、保持部材９により可動
コイル６を周縁から強固に抱持することができると共
に、アーム５に設けた突起５ａは保持部材９内に埋設さ
れ、かつ貫通穴５ｂ内にも保持部材９を構成する熱可塑
性樹脂が充填されるため、アーム５と可動コイル６との
接合強度を向上させ得る。すなわち鳩尾状に形成した突
起５ａおよび貫通穴５ｂによりＡ方向の耐引抜力が増大
すると共に、Ｂ方向の曲げ強度をも併せて向上させ得る
のである。また本発明では、アーム５に設ける突起５ａ
の形状はアーム５の形状や寸法などに応じて工夫するこ
とがアーム５と可動コイル６との接合強度を向上させる
上で望ましい。上記以外の突起形状としては例えば次の
ようなものがある。With the above structure, the movable coil 6 can be firmly held by the holding member 9 from the peripheral edge, and the projection 5a provided on the arm 5 is embedded in the holding member 9 and also in the through hole 5b. Also, since the thermoplastic resin forming the holding member 9 is filled, the joint strength between the arm 5 and the movable coil 6 can be improved. That is, the pull-out resistance in the A direction is increased by the dovetail-shaped projections 5a and the through holes 5b, and the bending strength in the B direction can also be improved. Further, in the present invention, the protrusion 5a provided on the arm 5
It is desirable to devise the shape according to the shape and size of the arm 5 in order to improve the bonding strength between the arm 5 and the movable coil 6. Examples of protrusion shapes other than the above are as follows.
【００１７】図３および図４は各々本発明の他の実施例
を示す要部平面図および要部縦断面図であり、同一部分
は前記図１および図２と同一の参照符号で示す。この実
施例は、アーム５が薄く（例えば厚さｔが２〜３mm程
度）、またアーム５の可動コイル６との接合部の曲率が
大きく、単一の突起５ａだけではアーム５と可動コイル
６との接合強度が十分ではない場合の例である。すなわ
ちこの実施例では、突起５ａは平面への投影輪郭を略三
角形状に形成し、可動コイル６側の端縁部近傍に２個設
けると共に、貫通穴５ｂを設けたものである。3 and 4 are a plan view and a longitudinal sectional view of an essential part showing another embodiment of the present invention, respectively, and the same parts are designated by the same reference numerals as those in FIGS. 1 and 2. In this embodiment, the arm 5 is thin (for example, the thickness t is about 2 to 3 mm), and the curvature of the joint portion of the arm 5 with the movable coil 6 is large, so that the arm 5 and the movable coil 6 have only a single protrusion 5a. This is an example of the case where the bonding strength with That is, in this embodiment, the projections 5a are formed so that the contours projected on the plane are formed in a substantially triangular shape, and two projections 5a are provided near the end edge portion on the movable coil 6 side, and a through hole 5b is provided.
【００１８】上記の構成により、保持部材９により可動
コイル６を周縁から強固に抱持することができると共
に、アーム５に設けた２つの突起５ａは保持部材９内に
埋設され、かつ貫通穴５ｂ内にも保持部材９を構成する
熱可塑性樹脂が充填されるため、アーム５と可動コイル
６との接合強度を向上させ得る。すなわち略三角形状に
形成した２つの突起５ａおよび貫通穴５ｂによりＡ方向
の耐引抜力が増大すると共に、Ｂ方向の曲げ強度も併せ
て向上させ得る。With the above structure, the holding member 9 can firmly hold the movable coil 6 from the peripheral edge, and the two protrusions 5a provided on the arm 5 are embedded in the holding member 9 and the through hole 5b. Since the thermoplastic resin forming the holding member 9 is also filled inside, the joint strength between the arm 5 and the movable coil 6 can be improved. That is, the two projections 5a and the through holes 5b formed in a substantially triangular shape can increase the pull-out resistance in the A direction and also improve the bending strength in the B direction.
【００１９】図５および図６は各々本発明の更に他の実
施例を示す要部平面図および要部縦断面図、図７は図６
におけるＣ−Ｃ線断面図であり、同一部分は前記図１な
いし図４と同一の参照符号で示す。この実施例は、ハー
フハイト形のような薄型のボイスコイルモータのように
可動コイル６が薄く、可動コイル６とアーム５との接合
部の厚みを十分にとれない場合の例である。すなわちこ
の実施例では、突起５ａはアーム５の一方の端面と実質
的に同一の端面を有するように形成すると共に、貫通穴
５ｂを設ける。次に５ｃは凹部であり、突起５ａの外方
端面側に前記貫通穴５ｂを包囲するように形成する。5 and 6 are a plan view and a longitudinal sectional view of a main part, respectively, showing still another embodiment of the present invention, and FIG.
6 is a cross-sectional view taken along line C-C in FIG. 4, and the same portions are denoted by the same reference numerals as those in FIGS. 1 to 4. This embodiment is an example of a case where the movable coil 6 is thin like a thin voice coil motor such as a half-height type, and the thickness of the joint portion between the movable coil 6 and the arm 5 cannot be sufficiently obtained. That is, in this embodiment, the protrusion 5a is formed so as to have an end face substantially the same as one end face of the arm 5, and the through hole 5b is provided. Next, 5c is a recess, which is formed on the outer end face side of the protrusion 5a so as to surround the through hole 5b.
【００２０】上記の構成により、保持部材９により可動
コイル６を周縁から強固に抱持することができると共
に、アーム５に設けた突起５ａは保持部材９内に埋設さ
れ、かつ貫通穴５ｂ内にも保持部材９を構成する熱可塑
性樹脂が充填されるため、アーム５と可動コイル６との
接合強度を向上させ得る。すなわち突起５ａ、貫通穴５
ｂおよび凹部５ｃを設けたことにより、Ａ方向の耐引抜
力が増大すると共に、Ｂ方向の曲げ強度をも併せて向上
させ得るのである。With the above structure, the movable coil 6 can be firmly held by the holding member 9 from the peripheral edge, and the projection 5a provided on the arm 5 is embedded in the holding member 9 and in the through hole 5b. Also, since the thermoplastic resin forming the holding member 9 is filled, the joint strength between the arm 5 and the movable coil 6 can be improved. That is, the protrusion 5a and the through hole 5
By providing b and the recess 5c, the pull-out resistance in the A direction can be increased, and the bending strength in the B direction can be improved together.
【００２１】図８は本発明のまた更に他の実施例におけ
る可動コイル６の要部縦断面図である。図８において６
ａは可動コイル６の厚み方向の抜け止め用の溝であり、
可動コイル６の巻線時において予め形成しておく。この
ように溝６ａを設けることにより、保持部材９（図６お
よび図７参照）による固着作用を増大することができ
る。FIG. 8 is a longitudinal sectional view of a main part of a movable coil 6 according to still another embodiment of the present invention. 6 in FIG.
a is a groove for preventing the movable coil 6 from coming off in the thickness direction,
It is formed in advance when winding the movable coil 6. By providing the groove 6a in this way, the fixing action of the holding member 9 (see FIGS. 6 and 7) can be increased.
【００２２】上記の保持部材９を構成する熱可塑性樹脂
の種類は、保持部材９に要求される剛性や耐熱性その他
を勘案して適宜選定可能であり、上記以外に例えばポリ
ブチレンテレフタレート樹脂、ポリアミド樹脂、ポリイ
ミド樹脂、ポリアミドイミド樹脂、ポリエステル樹脂等
の公知の樹脂（好ましくは耐熱性樹脂がよい）を用い得
る。The type of the thermoplastic resin forming the holding member 9 can be appropriately selected in consideration of the rigidity, heat resistance and the like required for the holding member 9. Other than the above, for example, polybutylene terephthalate resin, polyamide A known resin (preferably a heat-resistant resin) such as a resin, a polyimide resin, a polyamide-imide resin, or a polyester resin can be used.
【００２３】これらの樹脂の内では、縦弾性率（測定
法：ＡＳＴＭ Ｄ−６３８）が１０×１０4 kg／cm2 以
上（好ましくは１３×１０4 kg／cm2 以上）のものが好
ましい。特に熱可塑性樹脂として液晶ポリマー（溶融状
態で液晶性を示す）の一種である液晶性ポリエステル樹
脂（主鎖中に剛直鎖を有するポリエステル）を使用する
と好ましい。Among these resins, those having a longitudinal elastic modulus (measurement method: ASTM D-638) of 10 × 10 4 kg / cm 2 or more (preferably 13 × 10 4 kg / cm 2 or more) are preferable. In particular, it is preferable to use, as the thermoplastic resin, a liquid crystalline polyester resin (polyester having a rigid straight chain in the main chain) which is a kind of liquid crystal polymer (which exhibits liquid crystallinity in a molten state).
【００２４】以上の実施例においては、磁気ヘッド用の
アクチュエータについて記述したが、アームの一端に設
けるべき機能部材は磁気ヘッドのみでなく、光ヘッドそ
の他のものであっても作用は同様である。また磁気回路
は、対向する１対のヨークの一方のみに永久磁石を固着
した構造のものでもよい。In the above embodiments, the actuator for the magnetic head has been described, but the functional members to be provided at one end of the arm are not limited to the magnetic head, but the optical head and other functional members have the same operation. Further, the magnetic circuit may have a structure in which a permanent magnet is fixed to only one of the pair of opposed yokes.
【００２５】[0025]
【発明の効果】本発明は以上記述のような構成および作
用であるから、アームと可動コイルとの位置決め精度お
よび接合固着強度を大幅に向上させ得る。可動コイルの
部分における保持部材の厚さ寸法を可動コイルの厚さ寸
法と実質的に同一に形成したことにより、磁気空隙を小
に形成することができ、推力および応答性を向上させ得
る。Since the present invention has the structure and operation as described above, it is possible to greatly improve the positioning accuracy between the arm and the movable coil and the bonding strength. By forming the thickness of the holding member in the movable coil portion to be substantially the same as the thickness of the movable coil, the magnetic gap can be formed small and thrust and responsiveness can be improved.
【図１】本発明の実施例を示す要部平面図である。FIG. 1 is a plan view of an essential part showing an embodiment of the present invention.
【図２】本発明の実施例を示す要部縦断面図である。FIG. 2 is a longitudinal sectional view of an essential part showing an embodiment of the present invention.
【図３】本発明の他の実施例を示す要部平面図である。FIG. 3 is a plan view of an essential part showing another embodiment of the present invention.
【図４】本発明の他の実施例を示す要部縦断面図であ
る。FIG. 4 is a longitudinal sectional view of a main part showing another embodiment of the present invention.
【図５】本発明の更に他の実施例を示す要部平面図であ
る。FIG. 5 is a plan view of an essential part showing still another embodiment of the present invention.
【図６】本発明の更に他の実施例を示す要部縦断面図で
ある。FIG. 6 is a longitudinal sectional view of a main part showing still another embodiment of the present invention.
【図７】図６におけるＣ−Ｃ線断面図である。7 is a cross-sectional view taken along the line CC in FIG.
【図８】本発明のまた更に他の実施例における可動コイ
ルの要部縦断面図である。FIG. 8 is a longitudinal sectional view of a main part of a movable coil according to still another embodiment of the present invention.
【図９】従来の揺動型アクチュエータの例を示す一部破
砕一部断面平面図である。FIG. 9 is a partially crushed, partially cross-sectional plan view showing an example of a conventional rocking type actuator.
【図１０】図９におけるＤ方向矢視図である。10 is a view on arrow D in FIG. 9. FIG.
５ アーム ６ 可動コイル ５ａ 突起 ５ｂ 貫通穴 ９ 保持部材 5 arms 6 moving coil 5a protrusion 5b through hole 9 Holding member
Claims (4)
に永久磁石を固着し、この永久磁石の表面に磁気空隙を
形成してなるハウジングと、一端に可動コイルを他端に
機能部材を各々固着して揺動自在に形成したアームとか
らなり、前記磁気空隙内に可動コイルを移動自在に配設
して構成した揺動型アクチュエータにおいて、 アームの可動コイル側に貫通穴を有する突起を一体に設
け、熱可塑性樹脂からなり可動コイルの周縁部およびア
ームの突起を抱持するように形成した保持部材により可
動コイルとアームとを一体に接合すると共に、可動コイ
ルの周縁部を抱持する保持部材の厚さ寸法を可動コイル
の厚さ寸法と実質的に同一に形成したことを特徴とする
揺動型アクチュエータ。1. A housing in which a permanent magnet is fixed to at least one of a pair of opposed yokes and a magnetic gap is formed on the surface of the permanent magnet, and a movable coil is fixed to one end and a functional member is fixed to the other end. In the swing-type actuator configured by movably disposing a movable coil in the magnetic gap, a projection having a through hole is integrally formed on the movable coil side of the arm. A holding member which is provided and which is made of a thermoplastic resin and integrally holds the movable coil and the arm with a holding member which is formed to hold the peripheral portion of the movable coil and the protrusion of the arm, and which holds the peripheral portion of the movable coil. The oscillating actuator is characterized in that the thickness of the movable coil is formed to be substantially the same as the thickness of the moving coil.
郭を鳩尾状に形成しかつ貫通穴を有する突起を一体に設
けたことを特徴とする請求項１記載の揺動型アクチュエ
ータ。2. The oscillating actuator according to claim 1, wherein a projection contour on a plane is formed in a dovetail shape on the movable coil side of the arm, and a projection having a through hole is integrally provided.
通穴を有する突起を一体に設けたことを特徴とする請求
項１記載の揺動型アクチュエータ。3. The oscillating actuator according to claim 1, wherein a protrusion having a through hole is integrally provided in the vicinity of the end portion of the arm on the movable coil side.
実質的に同一の端面を有する突起を一体に設け、この突
起に貫通穴を設けると共に、突起の外方端面側に前記貫
通穴を包囲するように形成した凹部を設けたことを特徴
とする請求項１記載の揺動型アクチュエータ。4. A protrusion having an end face substantially the same as the end face of the arm is integrally provided on the movable coil side of the arm, a through hole is provided in the protrusion, and the through hole is surrounded on the outer end face side of the protrusion. An oscillating actuator according to claim 1, further comprising a concave portion formed to
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3226270A JPH07110122B2 (en) | 1990-10-04 | 1991-09-06 | Oscillating actuator |
Applications Claiming Priority (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2-104692 | 1990-10-04 | ||
| JP10469290 | 1990-10-04 | ||
| JP40396290A JP2847970B2 (en) | 1989-12-28 | 1990-12-20 | Gas sensor and method of manufacturing the same |
| JP2-403962 | 1990-12-20 | ||
| JP3-3511 | 1991-01-10 | ||
| JP351191 | 1991-01-10 | ||
| JP3226270A JPH07110122B2 (en) | 1990-10-04 | 1991-09-06 | Oscillating actuator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0522921A true JPH0522921A (en) | 1993-01-29 |
| JPH07110122B2 JPH07110122B2 (en) | 1995-11-22 |
Family
ID=27453883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3226270A Expired - Lifetime JPH07110122B2 (en) | 1990-10-04 | 1991-09-06 | Oscillating actuator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07110122B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6162667A (en) * | 1994-03-28 | 2000-12-19 | Sharp Kabushiki Kaisha | Method for fabricating thin film transistors |
| KR100444696B1 (en) * | 1997-03-25 | 2004-11-06 | 삼성전자주식회사 | Coupling method and device of hard disk drive actuator |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60159566U (en) * | 1984-03-30 | 1985-10-23 | 住友特殊金属株式会社 | Head positioning device |
| JPH01129753A (en) * | 1987-11-13 | 1989-05-23 | Shicoh Eng Co Ltd | Linear dc motor having magnetic encoder |
-
1991
- 1991-09-06 JP JP3226270A patent/JPH07110122B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60159566U (en) * | 1984-03-30 | 1985-10-23 | 住友特殊金属株式会社 | Head positioning device |
| JPH01129753A (en) * | 1987-11-13 | 1989-05-23 | Shicoh Eng Co Ltd | Linear dc motor having magnetic encoder |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6162667A (en) * | 1994-03-28 | 2000-12-19 | Sharp Kabushiki Kaisha | Method for fabricating thin film transistors |
| KR100444696B1 (en) * | 1997-03-25 | 2004-11-06 | 삼성전자주식회사 | Coupling method and device of hard disk drive actuator |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07110122B2 (en) | 1995-11-22 |
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