JPH03225806A - Yoke and its manufacture - Google Patents
Yoke and its manufactureInfo
- Publication number
- JPH03225806A JPH03225806A JP1898490A JP1898490A JPH03225806A JP H03225806 A JPH03225806 A JP H03225806A JP 1898490 A JP1898490 A JP 1898490A JP 1898490 A JP1898490 A JP 1898490A JP H03225806 A JPH03225806 A JP H03225806A
- Authority
- JP
- Japan
- Prior art keywords
- yoke
- materials
- linear magnetic
- magnetic material
- linear
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 12
- 239000000696 magnetic material Substances 0.000 claims abstract description 69
- 239000000463 material Substances 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 claims description 20
- 238000000137 annealing Methods 0.000 claims description 17
- 239000004020 conductor Substances 0.000 claims description 11
- 230000004907 flux Effects 0.000 claims description 11
- 238000007747 plating Methods 0.000 claims description 9
- 239000010410 layer Substances 0.000 claims description 2
- 239000002344 surface layer Substances 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052742 iron Inorganic materials 0.000 abstract description 3
- 229910000531 Co alloy Inorganic materials 0.000 abstract description 2
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 abstract description 2
- QVYYOKWPCQYKEY-UHFFFAOYSA-N [Fe].[Co] Chemical compound [Fe].[Co] QVYYOKWPCQYKEY-UHFFFAOYSA-N 0.000 abstract description 2
- 239000010959 steel Substances 0.000 abstract description 2
- -1 etc. Inorganic materials 0.000 abstract 1
- 238000000465 moulding Methods 0.000 description 10
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 208000017227 ADan amyloidosis Diseases 0.000 description 1
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 201000000194 ITM2B-related cerebral amyloid angiopathy 2 Diseases 0.000 description 1
- 229910000576 Laminated steel Inorganic materials 0.000 description 1
- 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 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Landscapes
- Manufacturing Of Steel Electrode Plates (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、小型モータなどに使用されるヨークおよびそ
の製造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a yoke used in a small motor, etc., and a method for manufacturing the same.
［従来の技術］
小型モータには、界磁用として磁石が数多く使用される
ほが、その界磁分布を適切なものとするために、ヨーク
が使用される。[Prior Art] The more magnets are used for the field in a small motor, the more a yoke is used to make the field distribution appropriate.
最近、ＯＡ＠器やＦＡ機器などの進歩に伴って、これら
の機器に使用される小型モータは、使用目的にあった構
造を有することが要求されるとともに、使用されるヨー
クも小型化し、複雑な形状のものか要求されるようにな
ってきた。分けても、ＨＤＤやＦＤＤ等の磁気ヘット駆
動用モータやＣＤ等の光ピツクアップ用アクチュエータ
においては、ヨークの小型化、最適磁気回路に即したヨ
ーク形状であることか重要な問題となってきた。またこ
れらのアクチュエータでは、制御性か重要であり、ヨー
クに求められる性質として電気抵抗の低いことが挙げら
れる。Recently, with the advancement of OA @ equipment and FA equipment, the small motors used in these equipment are required to have a structure that suits the purpose of use, and the yokes used are also becoming smaller and more complex. Increasingly, there is a demand for something with a certain shape. In particular, in motors for driving magnetic heads such as HDDs and FDDs, and actuators for optical pickups such as CDs, the miniaturization of yokes and the yoke shape suitable for optimal magnetic circuits have become important issues. Controllability is also important for these actuators, and low electrical resistance is one of the properties required of the yoke.
ヨークの小型化とともに任意の形状のものにするために
は、複雑な加工を必要とする。このようなヨークの製造
法としてロストワックス法や粉末冶金による方法かある
が、低コストて最適な磁気回路特性を有するヨークを得
ることが難しい。In order to miniaturize the yoke and make it into an arbitrary shape, complicated machining is required. Methods for manufacturing such a yoke include the lost wax method and powder metallurgy, but it is difficult to obtain a yoke that is low cost and has optimal magnetic circuit characteristics.
方、任意の形状を得るものとして、積層鋼板として実現
する方法かあるが、アクチュエータの界磁ヨークとして
は機械的強度も必要であり、問題かある。On the other hand, to obtain an arbitrary shape, there is a method of realizing it as a laminated steel plate, but it also requires mechanical strength as a field yoke of an actuator, which poses a problem.
低コストで、借れた磁気回路を有し低電気抵抗であるヨ
ークを比較的容易に提供するものとして、導電性のメッ
キを施した珪素鋼板などの板状磁性材料を積層し、焼き
付かせて任意形状を得る方法がある。しかし、この方法
で得られたヨークでは、３次元的に非常に複雑な形状の
ものが得にくい。In order to provide a low-cost yoke with a magnetic circuit and low electrical resistance, it is possible to produce a yoke with a low electrical resistance by laminating plate-shaped magnetic materials such as conductive plated silicon steel plates and making them hard to bake. There is a method to obtain an arbitrary shape. However, with the yoke obtained by this method, it is difficult to obtain a yoke with a three-dimensionally very complex shape.
このように、従来のヨークでは、形状、磁気回路特性、
コスト面で問題が多く、十分てない。In this way, with conventional yokes, the shape, magnetic circuit characteristics,
There are many problems in terms of cost, and it is not enough.
［発明が解決しようとする３題］
本発明は、既に述べた従来技術の問題点を解決し、任意
形状の磁性体にして、最適な界磁磁束分布か得られ、し
かもこの磁性体を用いたアクチュエータの制御性か優れ
、かつ安価なヨークおよびその製造方法を提供すること
を目的としてなされた。[Three Problems to be Solved by the Invention] The present invention solves the problems of the prior art described above, makes it possible to obtain an optimal field magnetic flux distribution by making a magnetic material into an arbitrary shape, and furthermore, it is possible to use this magnetic material. The purpose of this invention was to provide an inexpensive yoke with excellent controllability of an actuator, and a method for manufacturing the same.
［課題を解決するための手段］
本発明の特徴とするところは、
線状の磁性材料を組み合わせてつくられる成形体からな
り、材料間が焼き付き状態となっていることを特徴とす
るヨーク。[Means for Solving the Problems] The present invention is characterized by: A yoke that is made of a molded body made by combining linear magnetic materials, and that the materials are in a burned state.
線状磁性材料の線の向きを所定の磁束流れに沿うように
、線状の磁性材料を組み合わせて形成されたものである
ヨーク。A yoke is formed by combining linear magnetic materials such that the lines of the magnetic materials are oriented along a predetermined magnetic flux flow.
線状磁性材料が、導電性材料のメッキ層を有するもので
あるヨーク。A yoke in which a linear magnetic material has a plating layer of a conductive material.
線状磁性材料を組み合わせ、所定形状に形成した後、加
圧状態下に焼鈍し、材料間で焼き付きを生ぜしめること
を特徴とするヨークの製造方法。A method for manufacturing a yoke, which comprises combining linear magnetic materials, forming them into a predetermined shape, and then annealing them under pressure to cause seizure between the materials.
加圧状態下の焼鈍が、還元性雰囲気下でなされるもので
あるヨークの製造方法。A method for manufacturing a yoke in which annealing under pressure is performed in a reducing atmosphere.
線状磁性材料が、その表層に導電性材料のメッキ層を施
したものであるヨークの製造方法。A method for manufacturing a yoke in which a linear magnetic material is plated with a conductive material on its surface.
線状磁性材料と板状磁性材料を組み合わせたものである
ヨーク。A yoke that is a combination of linear magnetic material and plate-shaped magnetic material.
線状磁性材料と板状磁性材料を組み合わせたものである
ヨークの製造方法。A method for manufacturing a yoke that is a combination of linear magnetic material and plate-shaped magnetic material.
にある。It is in.
以下に、本発明の詳細な説明する。The present invention will be explained in detail below.
まず１本発明のヨークに用いる線状の磁性材料としては
、電磁軟鉄、普通鋼等をはじめ鉄ニツケル合金、鉄コバ
ルト合金等その他磁性体であれば用いることかできる。First, as the linear magnetic material used in the yoke of the present invention, any magnetic material such as electromagnetic soft iron, common steel, iron-nickel alloy, iron-cobalt alloy, etc. can be used.
こわらの線状磁性材料の断面は、丸、楕円、六角形、四
角形、三角形やこれらの形状に近いものなと制限はない
。さらに、線状磁性材料の種類は１種類たけてなく、２
種類以上ての組合せても構わなく、また板状磁性材料と
組み合わせてもよい。The cross section of the stiff linear magnetic material is not limited to a circle, ellipse, hexagon, square, triangle, or anything close to these shapes. Furthermore, there are more than one type of linear magnetic material, and two types.
It is possible to combine more than one type of material, and it is also possible to combine it with a plate-shaped magnetic material.
組合せ成形後、材料間を十分に焼き付かせ、機械的強度
の高いヨークとするためには、線状の磁性材料の表面は
、油や異物による汚れのない清浄なものであることおよ
び表面粗度の小さいことか必要である。線状の磁性材料
の表面を清浄にするには、酸洗や油洗を行えばよい。After combination molding, the surface of the linear magnetic material must be clean and free from oil and foreign matter contamination, and the surface must be rough in order to sufficiently bake between the materials and create a yoke with high mechanical strength. A small degree is necessary. To clean the surface of a linear magnetic material, pickling or oil washing may be performed.
線状磁性材料を組合せ、所定の形状にするためには、線
状磁性材料を切断し、組み合わせるが、必要があれば、
成形加工してもよい。この成形加工は組合せ成形後に材
料間を七分に焼き付かせるために、接触面積を増やす場
合や磁性材料の占績率を高めるためにも効果的である。In order to combine linear magnetic materials into a predetermined shape, the linear magnetic materials are cut and combined, but if necessary,
It may also be molded. This molding process is also effective for increasing the contact area and increasing the occupancy rate of the magnetic material in order to cause the materials to be baked evenly after the combination molding.
所定の形状のヨークを得るためには、線状磁性切断する
材料の長さとその組合せを考慮する必要があり、また組
合せ成形後の焼き付きをさせる焼鈍を行い、その往ヨー
クの最終形状を得るにおいて、焼き付き工程である焼鈍
との温度差による熱歪を考慮することも必要である。In order to obtain a yoke of a predetermined shape, it is necessary to consider the length of the material to be linearly magnetically cut and the combination thereof, and also to perform annealing to cause seizure after the combination molding, and to obtain the final shape of the yoke. It is also necessary to consider thermal distortion due to the temperature difference between the annealing process and the seizure process.
焼鈍は、成形加工された線状磁性材料組合せ成形体の歪
を解放し、さらに材料間での焼き付きを生ゼしぬ、所定
の形状において十分な機械的強度を有せしめるに必要な
温度と時間で遂行されなければならない。この焼鈍工程
で、成形加工された線状磁性材料組合せ成形体か所定の
形状を維持し、材１４間での焼き付きを促進するために
は、焼鈍は、成形加工された線状磁性材料組合せ成形体
を加圧状態のもとて行わなければならない。しかしなか
ら、成形された線状磁性材料の組合せ成形体のｎｍて同
し効果か得られるならば加圧手段を省略できる。また、
焼鈍は還元雰囲気下に遂行されることか好ましい。Annealing is the temperature and time necessary to release the distortion of the molded linear magnetic material combination molded product, and to make it have sufficient mechanical strength in a predetermined shape without causing seizure between the materials. must be carried out. In this annealing process, in order to maintain the predetermined shape of the formed linear magnetic material combination molded body and promote seizure between the materials 14, annealing is performed on the formed linear magnetic material combination molded body. It must be performed with the body under pressure. However, if the same effect can be obtained at nm of the molded combination molded body of linear magnetic materials, the pressurizing means can be omitted. Also,
Preferably, the annealing is performed under a reducing atmosphere.
線状磁性材料の表面は酸化膜で覆われていることか多く
、このままでは焼き付きか生し難い。焼鈍を１−元雰囲
気下て遂行すると、線状磁性材料の表面か５元され、材
料間て焼き付きか生し易くなる。焼鈍を還元雰囲気下で
遂行するプロセスか有効である。The surface of a linear magnetic material is often covered with an oxide film, and if left as is, burn-in is unlikely to occur. When annealing is performed in a one-component atmosphere, the surface of the linear magnetic material becomes five-component, making it easy for seizure to occur between the materials. A process in which annealing is performed under a reducing atmosphere is effective.
一方、焼鈍過程で材料間での焼き付きを生じさせる前に
、線状磁性材料の表面に導電性材料をメ・ツキしておく
と、組み合わされた線状磁性材料の材料間の電気抵抗を
小さくすることができると共に、メッキされた導電性材
料がメッキされていない素材の線状磁性材料より焼き付
き易い場合には、焼鈍による材料間での焼き付きを、よ
り促進することになる。線状磁性材料の表面にメッキさ
れる導電性材料として、銅、アルミニウム、ニッケル、
錫、亜鉛なとおよびこれらの合金を用いることかてきる
。メッキ厚さは、組み合わされた線状磁性材料の材料間
の電気抵抗を小さくでき、また、材料間での焼き付きを
促進して線状磁性材料組合せ成形体の機械的強度を十分
ならしめるに必要な厚さでなければならない。線状磁性
材料の表面にメッキされる導電性材料の種類は、メッキ
の難易度や要求される磁気回路特性によって決定する必
要かある。線状の磁性材料の長さ方向に対して手直方向
に磁束を流す場合には、導電性材料として、ニッケル等
の磁化特性の優れたものを選択するとよい。逆に、線状
磁性材料の長さ方向と平行に磁束を流す場合には、非磁
性の導電性材料をメッキすｊばよい。On the other hand, if a conductive material is plated on the surface of the linear magnetic material before causing sticking between the materials during the annealing process, the electrical resistance between the combined linear magnetic materials can be reduced. In addition, if the plated conductive material is more likely to seize than the non-plated linear magnetic material, the annealing will further promote seizing between the materials. Conductive materials plated on the surface of linear magnetic materials include copper, aluminum, nickel,
It is possible to use tin, zinc, and their alloys. The plating thickness is necessary to reduce the electrical resistance between the combined linear magnetic materials, promote seizure between the materials, and ensure sufficient mechanical strength of the linear magnetic material combination molded product. It must be as thick as possible. The type of conductive material to be plated on the surface of the linear magnetic material needs to be determined depending on the difficulty of plating and the required magnetic circuit characteristics. When a magnetic flux is caused to flow in a direction perpendicular to the length direction of a linear magnetic material, it is preferable to select a conductive material having excellent magnetization properties, such as nickel. Conversely, if the magnetic flux is to flow parallel to the length direction of the linear magnetic material, it is sufficient to plate it with a non-magnetic conductive material.
［実施例コ
第１図に、ホイスコイルモータ用磁石ヨークを成形して
いる状態を示す。１．２は成形するための鼎てあり、３
は銅メッキした線状磁性材料を組み合わせて、成形され
たもので磁気回路を構成するものである。３を構成する
線状磁性材料は、平均直径か０．２ｍｍφの鉄線で、銅
を２μｍはどメッキしたものである。成形後、成形用の
型１．２と銅メッキされた線状磁性材料の成形体３との
間に、これらの間の焼き付きを防止するためのアルミナ
粉を塗布し、加圧下で１０００℃、２時間、水素中で焼
鈍し、３の線状磁性体の成形体を焼き付け、所定のヨー
ク形状を得ることかできた。[Example 1] Fig. 1 shows a state in which a magnet yoke for a whirlpool coil motor is being molded. 1.2 has a molding tool, 3
is formed by combining copper-plated linear magnetic materials to form a magnetic circuit. The linear magnetic material constituting 3 is an iron wire with an average diameter of 0.2 mm, and is plated with copper to a thickness of 2 μm. After molding, alumina powder was applied between the mold 1.2 and the molded body 3 of copper-plated linear magnetic material to prevent seizure between them, and the mixture was heated at 1000°C under pressure. After annealing in hydrogen for 2 hours, the molded body of linear magnetic material No. 3 was baked, and a predetermined yoke shape could be obtained.
第２図は、銅メッキされた線状磁性材料を組合せ、成形
、焼き付きて得られた磁石用ヨーク４に界磁用磁石５を
付けたものを示す。銅メッキされた線状磁性材料より得
られた磁石用ヨーク４は、はぼ磁束流れに沿った磁気回
路を有した３次元形状のヨークである。FIG. 2 shows a field magnet 5 attached to a magnet yoke 4 obtained by combining, molding, and baking copper-plated linear magnetic materials. The magnet yoke 4 made of copper-plated linear magnetic material is a three-dimensional yoke having a magnetic circuit that follows the flow of magnetic flux.
［発明の効果］
本発明のヨークは、表面が清浄かつ表面粗度が小さい線
状の磁性材料を所定形状に組合せ成形した後、加圧状態
下で焼鈍することにより材料間で焼き付きを生じさせ、
所定形状の磁性体としだものてあり、任意の形状のヨー
クを得ることができ、３次元の磁気回路を実現できる。[Effects of the Invention] The yoke of the present invention is made by combining and molding linear magnetic materials with clean surfaces and small surface roughness into a predetermined shape, and then annealing them under pressure to prevent seizure between the materials. ,
A magnetic material with a predetermined shape is used, and a yoke of any shape can be obtained, making it possible to realize a three-dimensional magnetic circuit.
また、磁気回路の磁束流れに沿って、線状磁性材料を組
合せ成形することにより理想的な磁気回路特性を有する
ヨークを得ることができる。Further, by combining and molding linear magnetic materials along the magnetic flux flow of the magnetic circuit, a yoke having ideal magnetic circuit characteristics can be obtained.
線状の磁性材料を組合せ構成したヨークであるけれども
、材料間で焼き付きを生じさせていること、および線表
面に導電性材料をメッキしていることより、層間抵抗を
小さくできるので、組合せ成形体に渦電流か流れ易くな
る。従って、モータ等のアクチュエータの界磁磁石用ヨ
ークとすると、電機子電流による磁束変化を抑制するの
て、制御上好ましい。Although the yoke is made up of a combination of linear magnetic materials, it is possible to reduce the interlayer resistance by causing burn-in between the materials and by plating the wire surface with a conductive material. eddy currents flow more easily. Therefore, when used as a yoke for a field magnet of an actuator such as a motor, it is preferable for control because it suppresses changes in magnetic flux due to armature current.
さらに、組合せ成形体の材料間を十分に焼き付かせるこ
とにより、所定の形状を確保することか可能であるとと
もに、機械的強度をもたせることも可能である。Furthermore, by sufficiently baking between the materials of the combined molded body, it is possible to ensure a predetermined shape and also to provide mechanical strength.
また、線状の磁性材料表面に施すメッキのメッキ材料の
種類を適切に選択することにより、磁気回路特性を制御
できるから、所定の磁束流れを得易い。例えば、磁化特
性の優れたものをメッキ材料として選択すると、線状磁
性材料の長さ方向はもとより、長さ方向に対して直角方
向にも磁束を流すことができる。一方、メッキ材に非磁
性のものを選ぶと、線状磁性材料の長さ方向に対し直角
方向には磁性が流れ難くなり、長さ方向のみ磁束か流れ
易くなる。Furthermore, by appropriately selecting the type of plating material applied to the surface of the linear magnetic material, the magnetic circuit characteristics can be controlled, making it easy to obtain a predetermined magnetic flux flow. For example, if a material with excellent magnetization properties is selected as the plating material, magnetic flux can flow not only in the length direction of the linear magnetic material but also in a direction perpendicular to the length direction. On the other hand, if a non-magnetic plating material is selected, it becomes difficult for magnetism to flow in the direction perpendicular to the length of the linear magnetic material, and magnetic flux tends to flow only in the length direction.
本発明のヨークを構成する線状磁性材料は、切′断など
の加工は容易であり、加工コストの低減が可能であり、
また、メッキや焼鈍は多量処理に通し、本発明のヨーク
は量産可能である。The linear magnetic material constituting the yoke of the present invention is easy to process, such as cutting, and processing costs can be reduced.
Further, the yoke of the present invention can be mass-produced by performing plating and annealing in large quantities.
第１図は、ボイスコイルモータ用磁石ヨークを成形して
いる状態を示す図面、第２図は、銅メッキされた線状磁
性材料を組合せ、成形、焼き付きで得られたヨークに界
磁用磁石を付けたものを示す図面である。
１．２・・・成形用型、３−１気回路を構成する成形体
、４・・・ボイスコイルモータに使用される磁石用ヨー
ク、５・・・界磁用磁石。Figure 1 is a diagram showing the state in which a magnet yoke for a voice coil motor is being molded, and Figure 2 is a drawing showing a state in which a magnet yoke for a voice coil motor is being molded. It is a drawing showing what is attached. 1.2... Molding mold, 3-1 Molded body constituting the air circuit, 4... Magnet yoke used in voice coil motor, 5... Field magnet.
Claims (8)
らなり、材料間が焼き付き状態となっていることを特徴
とするヨーク。1. A yoke consisting of a molded body made of a combination of linear magnetic materials, characterized by a burned-in state between the materials.
うに、線状の磁性材料を組み合わせて形成されたもので
ある請求項１記載のヨーク。2. 2. The yoke according to claim 1, wherein the yoke is formed by combining linear magnetic materials such that the lines of the linear magnetic materials are oriented along a predetermined magnetic flux flow.
のである請求項１記載のヨーク。3. The yoke according to claim 1, wherein the linear magnetic material has a plating layer of a conductive material.
、加圧状態下に焼鈍し、材料間で焼き付きを生ぜしめる
ことを特徴とするヨークの製造方法。4. A method for manufacturing a yoke, which comprises combining linear magnetic materials, forming them into a predetermined shape, and then annealing them under pressure to cause seizure between the materials.
のである請求項４記載のヨークの製造方法。5. 5. The method for manufacturing a yoke according to claim 4, wherein the annealing under pressure is performed in a reducing atmosphere.
を施したものである請求項４または５記載のヨークの製
造方法。6. 6. The method of manufacturing a yoke according to claim 4, wherein the linear magnetic material has a surface layer plated with a conductive material.
ある請求項１、２または３記載のヨーク。7. The yoke according to claim 1, 2 or 3, wherein the yoke is a combination of a linear magnetic material and a plate-shaped magnetic material.
ある請求項４、５または６記載のヨークの製造方法。8. 7. The method of manufacturing a yoke according to claim 4, wherein the yoke is a combination of a linear magnetic material and a plate-shaped magnetic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1898490A JPH03225806A (en) | 1990-01-31 | 1990-01-31 | Yoke and its manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1898490A JPH03225806A (en) | 1990-01-31 | 1990-01-31 | Yoke and its manufacture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03225806A true JPH03225806A (en) | 1991-10-04 |
Family
ID=11986859
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1898490A Pending JPH03225806A (en) | 1990-01-31 | 1990-01-31 | Yoke and its manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03225806A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006353064A (en) * | 2005-06-20 | 2006-12-28 | Sumitomo Electric Ind Ltd | Inductor and inductor motor equipped with inductor |
-
1990
- 1990-01-31 JP JP1898490A patent/JPH03225806A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006353064A (en) * | 2005-06-20 | 2006-12-28 | Sumitomo Electric Ind Ltd | Inductor and inductor motor equipped with inductor |
| JP4706350B2 (en) * | 2005-06-20 | 2011-06-22 | 住友電気工業株式会社 | Inductor type motor |
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