JPS62181639A - Stepping motor with resin bracket - Google Patents
Stepping motor with resin bracketInfo
- Publication number
- JPS62181639A JPS62181639A JP2357886A JP2357886A JPS62181639A JP S62181639 A JPS62181639 A JP S62181639A JP 2357886 A JP2357886 A JP 2357886A JP 2357886 A JP2357886 A JP 2357886A JP S62181639 A JPS62181639 A JP S62181639A
- Authority
- JP
- Japan
- Prior art keywords
- bracket
- stepping motor
- magnetized
- magnetic
- permanent magnet
- 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
Links
- 229920005989 resin Polymers 0.000 title abstract description 5
- 239000011347 resin Substances 0.000 title abstract description 5
- 239000000696 magnetic material Substances 0.000 claims abstract description 13
- 229920005992 thermoplastic resin Polymers 0.000 claims description 8
- 229910000859 α-Fe Inorganic materials 0.000 claims description 4
- 239000004952 Polyamide Substances 0.000 claims description 2
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 2
- 239000004734 Polyphenylene sulfide Substances 0.000 claims description 2
- 229910000828 alnico Inorganic materials 0.000 claims description 2
- 229910017052 cobalt Inorganic materials 0.000 claims description 2
- 239000010941 cobalt Substances 0.000 claims description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 2
- 229920002647 polyamide Polymers 0.000 claims description 2
- 239000004417 polycarbonate Substances 0.000 claims description 2
- 229920000515 polycarbonate Polymers 0.000 claims description 2
- 229920000728 polyester Polymers 0.000 claims description 2
- 229920000098 polyolefin Polymers 0.000 claims description 2
- 229920006380 polyphenylene oxide Polymers 0.000 claims description 2
- 229920000069 polyphenylene sulfide Polymers 0.000 claims description 2
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 2
- 150000002910 rare earth metals Chemical class 0.000 claims description 2
- 238000001746 injection moulding Methods 0.000 abstract description 15
- 230000004907 flux Effects 0.000 abstract description 7
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 abstract 1
- 239000000088 plastic resin Substances 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 230000005389 magnetism Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 239000000843 powder Substances 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000008188 pellet Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 229910052712 strontium Inorganic materials 0.000 description 2
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 239000013585 weight reducing agent Substances 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 229920002292 Nylon 6 Polymers 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 235000013527 bean curd Nutrition 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000005300 metallic glass Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- AJCDFVKYMIUXCR-UHFFFAOYSA-N oxobarium;oxo(oxoferriooxy)iron Chemical compound [Ba]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O AJCDFVKYMIUXCR-UHFFFAOYSA-N 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229910000889 permalloy Inorganic materials 0.000 description 1
- 239000009386 qinghuang Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
Landscapes
- Motor Or Generator Frames (AREA)
Abstract
Description
【発明の詳細な説明】
（Ｍ梁上の利用分野）
本発明はフロッピーディスク、ハードディスク等の駆動
に好適な漏洩磁束の小さいステッピングモーターに関す
る。DETAILED DESCRIPTION OF THE INVENTION (Field of application on M beams) The present invention relates to a stepping motor with low leakage magnetic flux suitable for driving floppy disks, hard disks, etc.
（従来の技術）
近年、オフィスオートメーション機器の急速な普及に伴
い、フロッピーディスク、ノ＼−ドディスク、プリンタ
等の駆動用モーターとしてステプピングモーターが多用
されるようになってきた。(Prior Art) In recent years, with the rapid spread of office automation equipment, stepping motors have come into widespread use as driving motors for floppy disks, node disks, printers, and the like.
ステッピングモーターは磁気を利用して回転子の駆動を
行うが１ｗＡ動される側のフロッピーディスクやハード
ディスクも又、磁気を利用した情報記録媒体であり、漏
洩１６気による記録情報の脱落等のトラブルが起こシ寿
る。こうした漏洩磁気の最大の発生源として、ステッピ
ングモーター自体カｌ ケラれる。従りて、フロッピー
ディスクやノ１−ドディスク等の磁気記録媒体のｒＸ
！Ｉｌｕ用としてステッピングモーターを使用する場合
には１前後のブラケットに磁気シールド性に潰れた素材
を用いる必要がある。多くの場合、この素材として電磁
純鉄が使用され、鍛造、或いは粉末焼結により成形され
る。Stepping motors use magnetism to drive the rotor, but the floppy disks and hard disks that are driven by 1WA are also information recording media that use magnetism, and are prone to problems such as the recorded information falling off due to leakage. Wake up and live. The biggest source of such magnetic leakage is the stepping motor itself. Therefore, the rX of magnetic recording media such as floppy disks and node disks
! When using a stepping motor for Ilu, it is necessary to use a magnetically shielded material for the first and second brackets. In many cases, electromagnetic pure iron is used as this material, and it is formed by forging or powder sintering.
又、特開昭５８−１４１６５３号公報には、ブラケット
材料として純鉄、パーマロイ、アモルファスメタル等の
磁性材粉末を合成樹脂に配合し、射出成形して用いるこ
とが提案されている。Furthermore, Japanese Patent Application Laid-Open No. 58-141653 proposes that powder of a magnetic material such as pure iron, permalloy, or amorphous metal be mixed with a synthetic resin and used by injection molding as a bracket material.
（発明が解決しようとする問題点）
現在、ステッピングモーターへの禦求として微小ステッ
プ化、高効率化と共に、小形軽量化が挙げられている。(Problems to be Solved by the Invention) Currently, demands for stepping motors include smaller steps, higher efficiency, and smaller size and lighter weight.
微小ステップ化、高効率化に対しては、構造面からの対
策が最も有効であり９回転子に軸方向に磁化された永久
磁石が組込まれたハイブリッド形のステッピングモータ
ーが遇している。一方、小形軽量化に関しては、ブラケ
ット素材の影響が大きいが、磁気シールド性を要求され
るところからかなりの制約を受けている。即ち。For miniaturization and high efficiency, structural measures are most effective, and a hybrid stepping motor in which 9 rotors are incorporated with axially magnetized permanent magnets is being used. On the other hand, size and weight reduction is largely influenced by the material of the bracket, but is subject to considerable restrictions due to the requirement for magnetic shielding properties. That is.
電磁純鉄等の金属素材を使用することから軽量化には不
利であり、更に取造、或いは粉末焼結という成形法を彩
ることから、デザイン面からも小形化が困難である。Since it uses a metal material such as electromagnetic pure iron, it is disadvantageous for weight reduction, and furthermore, it is difficult to miniaturize from a design point of view because it requires a molding method such as molding or powder sintering.
一方、前記特開昭５８−１４１６５３号公報て提案され
ている磁性材粉末を合成樹脂に混合、射出成形し次ブラ
ケットでは、実用に充分な磁気シールド性を得るために
は、極めて多量の磁注纒扮末を混合しなければならず、
射出成形が困−唯となる。On the other hand, in the bracket proposed in the above-mentioned Japanese Patent Application Laid-Open No. 58-141653, which is made by mixing magnetic material powder with synthetic resin and injection molding, it is necessary to use an extremely large amount of magnetic injector in order to obtain a magnetic shielding property sufficient for practical use. Must be mixed with Qinghuang powder,
Injection molding becomes difficult.
（問題点を１ｙ−決するための手段）
本発明者らは、かｋる従来技術の有する間に’１３ 、
ａを解決すべく鋭意研究した結果１本発明を完成し次。(Means for resolving the problem) The present inventors discovered that while the prior art was
As a result of intensive research to solve the problem, we have completed the following invention.
即ち１本発明は、磁性材料を配合した熱可塑性樹脂を射
出成ＪＩ５したブラケットを有するステプピングモータ
ーであり、且つ該ブラケットの中央部シャフト穴付近が
、回転子に組込まれ、軸方向に磁化され比永久磁石の該
ブラケット側の極性と逆の極性に磁化されたものである
ことを特徴とするステッピングモーターである。That is, one aspect of the present invention is a stepping motor having a bracket made by injection molding JI5 of thermoplastic resin blended with a magnetic material, and the vicinity of the central shaft hole of the bracket is incorporated into a rotor and magnetized in the axial direction. The stepping motor is characterized in that a permanent magnet is magnetized with a polarity opposite to that on the bracket side.
以下１本発明の詳細な説明する。Hereinafter, one aspect of the present invention will be explained in detail.
本発明にか〜るステッピングモーターの一般的な構造を
第１図に示す、（１）はブラケット、（２）は固定子、
（３）は回転子、（４）はシャフトである。（３）の回
転子には、永久磁石（５）が組込まれておジ、シャフト
軸方向に磁化されている。従って、２つあるブラケット
に対面する永久磁石端の極性は、逆になり、このことが
本発明の重要なポイントとなる。The general structure of the stepping motor according to the present invention is shown in FIG. 1, where (1) is a bracket, (2) is a stator,
(3) is a rotor, and (4) is a shaft. A permanent magnet (5) is incorporated into the rotor (3) and is magnetized in the axial direction of the shaft. Therefore, the polarities of the permanent magnet ends facing the two brackets are reversed, which is an important point of the present invention.
即ち、永久磁石端の極性に対し、対面するブラケットの
中央部シャフト穴付近を逆、周縁部を同じ極性に磁化さ
せて組込むことにより１回転トルクを実質的に低下させ
ることなく極めて有効に、モーター外部に漏洩する磁気
を小さくすることが出来る。In other words, by magnetizing the central part of the facing bracket near the shaft hole to the opposite polarity to the polarity of the permanent magnet end, and magnetizing the peripheral part to the same polarity, the motor can be extremely effectively magnetized without substantially reducing the one-rotation torque. Magnetism leaking to the outside can be reduced.
ブラケットを磁化させないで組込む場合には。When assembling the bracket without magnetizing it.
射出成形が可能な溶［有］流動性を有する程度の磁性材
料の混合量では磁気ディスクに影侍を与えない程度に漏
洩磁気を抑制することは困難であり、一方充分な磁気シ
ールド性が期待される磁性材料の混合量では射出成形が
困難となる。It is difficult to suppress leakage magnetism to the extent that it does not affect the magnetic disk with a mixed amount of magnetic material that has fluidity that allows injection molding, but on the other hand, sufficient magnetic shielding properties are expected. Injection molding becomes difficult with the amount of magnetic material mixed.
本発明に使用する１餓性材料は永久磁石となるものであ
れば特に制限を受けないが、ストロンチウムフェライト
バリウムフェライト等のフェライト類、希土娯コバルト
、アルニコが好ましい。The monolithic material used in the present invention is not particularly limited as long as it becomes a permanent magnet, but ferrites such as strontium ferrite barium ferrite, rare earth cobalt, and alnico are preferable.
本発明に使用する熱可塑性樹脂としては溶融流動性を有
し、射出成形加工可能であればよいが、ポリアミド、ポ
リエステｐ、ポリカーボネート、ポリオレフィン、ポリ
フェニレンオキサイド、ボリフェニレンサルフ１イドが
好ましい。The thermoplastic resin used in the present invention may be any thermoplastic resin as long as it has melt flowability and can be processed by injection molding, but polyamide, polyester, polycarbonate, polyolefin, polyphenylene oxide, and polyphenylene sulfide are preferred.
本発明に力１〜るブラケットの製造法としては、ブラケ
ットに射出成形加工される迄の任意の段階で磁性材料と
熱可塑性樹脂が均一に混練されていればよい６例えば、
所定割合の磁性材料と熱可塑性樹脂とを、単軸混練機、
或いは多軸混練機を用いて溶融混練してペレットを製造
した後、射出成形加工してもよく、又磁性材料と熱可塑
性樹脂とを直接混線射出成形してもよい、又、得られた
ブラケットに対しア二−〜処理や調湿処理を施すことは
、寸法安定性向上のために好ましい。As for the manufacturing method of the bracket according to the present invention, the magnetic material and the thermoplastic resin may be uniformly kneaded at any stage before injection molding into the bracket.6 For example,
Magnetic material and thermoplastic resin in a predetermined ratio are mixed in a single-shaft kneader,
Alternatively, after producing pellets by melt-kneading using a multi-axis kneader, injection molding may be performed, or direct cross-wire injection molding of the magnetic material and thermoplastic resin may be performed. It is preferable to subject the material to an annealing treatment or a humidity conditioning treatment in order to improve dimensional stability.
ブラケットを磁化する方法としてはいくつか挙げられる
が１例えば磁場射出成形機を使用して射出成形時に磁化
してもよく、或いは通常の射出成形機を使用して成形し
た後、磁場内に置いて所定方向に磁化してもよい。ブラ
ケットの磁化の強さは、ステッピングモーターの出力軸
側シャフトの長手方向中央部付近での漏洩磁束が５ガウ
ス程度以下となるようにすることが好ましく、通常の場
合ブラケットの中央部シャフト穴付近の磁束密度３０が
ウス＃痩で゛ある。There are several ways to magnetize the bracket. For example, it may be magnetized during injection molding using a magnetic field injection molding machine, or it may be molded using a regular injection molding machine and then placed in a magnetic field. It may be magnetized in a predetermined direction. The magnetization strength of the bracket is preferably such that the leakage magnetic flux near the longitudinal center of the output shaft of the stepping motor is about 5 Gauss or less. The magnetic flux density is 30.
（発明の効果）
本発明にかへるステッピングモーターは樹脂製のブラケ
ットを有し、小形軽量化が容易で、且つ漏洩磁気が小さ
く、フロッピーディスクやハードディスクの駆動用モー
ターとして好適である。(Effects of the Invention) The stepping motor according to the present invention has a bracket made of resin, can be easily reduced in size and weight, and has low leakage magnetism, and is suitable as a motor for driving a floppy disk or a hard disk.
以下、実施例を用いて本発明の更に詳細な説明を行う。Hereinafter, the present invention will be explained in more detail using Examples.
実施例
ナイロンｅ４ＭＫｆｔ（カネボウ合繊（株）製Ｍｅ１０
２）１００ｊ！！Ｉｋ部に対して、ストロンチウムフェ
ライト粉末（東北金属（株）４１ｉ！、５Ｒ−１）２０
０重量部を配合し、２軸混練銭を用いて溶融混練し、ベ
レットを得た。Example Nylon e4MKft (Me10 manufactured by Kanebo Gosen Co., Ltd.)
2) 100j! ! For the Ik part, strontium ferrite powder (Tohoku Metal Co., Ltd. 41i!, 5R-1) 20
0 parts by weight was blended and melt-kneaded using a twin-screw kneader to obtain pellets.
次いで、得られたベレットを磁場射出成形機（株）タナ
ベコウギョウ裂、ＴＬ−５０ＭＧ８）を用いて、通常実
施されているナイロン６樹脂の条件と磁場内で射出成形
を実施し、出力軸側のブラケットは中央部シャフト穴付
近をＮ極、周辺部をＳ極、−力出力軸側と反体側のブラ
ケットは中央部シャフト穴付近をＳ極１周辺部をＮ極と
して。Next, the obtained pellet was injection molded using a magnetic field injection molding machine manufactured by Tanabe Kogyo Co., Ltd. (TL-50MG8) under the commonly used conditions of nylon 6 resin and in a magnetic field. The bracket has a north pole near the center shaft hole, a south pole around the periphery, and a south pole near the center shaft hole for the brackets on the side opposite to the force output shaft.
残留磁束密度２５ガオスのブラケットを得た。A bracket with a residual magnetic flux density of 25 Gaos was obtained.
得られたブラケットをステッピングモーターに組込み、
出力軸側の漏洩磁気の測定を行った。その結果を表−１
に示す、尚１表−１には電磁線鉄製、アｖミニウム製及
び上記の樹脂製ブラケットを磁化しない状憩で組込んだ
場合を比較例とじて表−１Assemble the obtained bracket into the stepping motor,
We measured leakage magnetism on the output shaft side. Table 1 shows the results.
Table 1 shows comparative examples in which brackets made of electromagnetic wire, aluminum, and the above resin are incorporated in a non-magnetized state.
第１図は、本発明、にか−るステッピングモーターの構
造を示したものである。
Ｉ 刀不ボワせ繊体式会社
第１図FIG. 1 shows the structure of a stepping motor according to the present invention. I Tofu Boise Textile Type Company Diagram 1
Claims (3)
ブラケットを有するステッピングモーターであり、且つ
該ブラケットの中央部シャフト穴付近が、回転子に組込
まれ、軸方向に磁化された永久磁石の該ブラケット側の
極性と逆の極性に磁化されたものであることを特徴とす
るステッピングモーター。(1) A stepping motor having a bracket injection-molded from a thermoplastic resin containing a magnetic material, and near the shaft hole in the center of the bracket is a part of the permanent magnet that is incorporated into the rotor and magnetized in the axial direction. A stepping motor characterized by being magnetized with a polarity opposite to that on the bracket side.
コである特許請求の範囲第１項記載のステッピングモー
ター。(2) The stepping motor according to claim 1, wherein the magnetic material is ferrite, rare earth cobalt, or alnico.
カーボネート、ポリオレフィン、ポリフェニレンオキサ
イド、ポリフェニレンサルファイドである特許請求の範
囲第１項記載のステッピングモーター。(3) The stepping motor according to claim 1, wherein the thermoplastic resin is polyamide, polyester, polycarbonate, polyolefin, polyphenylene oxide, or polyphenylene sulfide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2357886A JPS62181639A (en) | 1986-02-04 | 1986-02-04 | Stepping motor with resin bracket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2357886A JPS62181639A (en) | 1986-02-04 | 1986-02-04 | Stepping motor with resin bracket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62181639A true JPS62181639A (en) | 1987-08-10 |
Family
ID=12114437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2357886A Pending JPS62181639A (en) | 1986-02-04 | 1986-02-04 | Stepping motor with resin bracket |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62181639A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1215802A3 (en) * | 2000-12-18 | 2004-03-17 | ArvinMeritor Technology, LLC | Composite material motor housing |
-
1986
- 1986-02-04 JP JP2357886A patent/JPS62181639A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1215802A3 (en) * | 2000-12-18 | 2004-03-17 | ArvinMeritor Technology, LLC | Composite material motor housing |
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