JPS61284999A - Magnetostatic field shielding material - Google Patents
Magnetostatic field shielding materialInfo
- Publication number
- JPS61284999A JPS61284999A JP60126874A JP12687485A JPS61284999A JP S61284999 A JPS61284999 A JP S61284999A JP 60126874 A JP60126874 A JP 60126874A JP 12687485 A JP12687485 A JP 12687485A JP S61284999 A JPS61284999 A JP S61284999A
- Authority
- JP
- Japan
- Prior art keywords
- shielding
- magnetic field
- thickness
- conductive resin
- field shielding
- 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
Landscapes
- Laminated Bodies (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、静磁場シールド材に関し、殊に本来の静磁場
シールド性において卓効を有する他軽量且つ低コストで
成形性等の優れた静磁場シールド材に関するものである
。Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a static magnetic field shielding material, and particularly to a static magnetic field shielding material that is extremely effective in its inherent static magnetic field shielding properties, is lightweight, low cost, and has excellent formability. This relates to magnetic field shielding materials.
［従来の技術］
近年、種々の電気設備や電子機器等の著しい普及に伴な
いこれらから漏洩する電磁波や漏洩磁束等による電波妨
害や電気妨害等が大きな問題として提起されるに至って
いる。そこでこうした妨害作用等を防止する為種々の立
場から広範な検討が進められているが、その１つに電磁
波シールド材を挙げることができる。[Background Art] In recent years, with the remarkable spread of various electrical equipment and electronic devices, radio wave interference and electrical interference due to electromagnetic waves and leakage magnetic flux leaking from these devices have become a major problem. Therefore, in order to prevent such interference, extensive studies are being carried out from various viewpoints, one of which is electromagnetic shielding materials.
ところで上記電磁波シールド材の代表的なものとしては
、（１）アルミニウム等の非磁性金属。By the way, typical examples of the above-mentioned electromagnetic shielding materials include (1) non-magnetic metals such as aluminum;
（２）パーマロイ、（３）珪素鋼板等からなる金属箔や
金属板（以ド金属板淳という）が例示される。アルミニ
ウム等の非磁性金属（１）からなる金属板等は、高周波
側の電磁波に対するシールド効果は、良好であるものの
、低周波側の電磁波や静磁場に対するシールド効果が不
十分である。これに対し上記（２）のパーマロイや上記
（３）の珪素鋼からなる金属板等は、低周波側の電磁波
や静磁場に対するシールド効果が非常に優れており、こ
の為多くの分野で使用されている。しかしながらパーマ
ロイ（２）は、これを薄肉材として用いた場合必ずしも
満足のいく静磁場シールド効果を期し難く（低周波側の
電磁波シールド効果は厚肉の場合同ｇｉ優れている）、
十分な静磁場シールド効果を得る為にはパーマロイ（２
）を厚肉の板状体として用いざるを得ない、従って殊に
ｆｆＩ′Ｍ’ｃ制限を伴なうａ器等に、上記静磁場シー
ルド効果を期待して使用する場合にあっては、該使用が
不能になることも稀ではない。しかも上記パーマロイ（
２）からなる金属板は、ニッケルを多礒に含む為製造コ
ストが高く、そのＬ成形性の点で劣るばかりか該成形後
特殊な焼鈍処理を必要とする等、製造り、コスト上の欠
点が指摘されている。(2) permalloy, (3) metal foil and metal plate (hereinafter referred to as metal plate) made of silicon steel plate, etc. are exemplified. A metal plate made of a non-magnetic metal (1) such as aluminum has a good shielding effect against electromagnetic waves on the high frequency side, but has an insufficient shielding effect against electromagnetic waves and static magnetic fields on the low frequency side. On the other hand, metal plates made of permalloy (2) and silicon steel (3) have excellent shielding effects against low-frequency electromagnetic waves and static magnetic fields, and are therefore used in many fields. ing. However, when Permalloy (2) is used as a thin-walled material, it is difficult to achieve a satisfactory static magnetic field shielding effect (the electromagnetic shielding effect on the low frequency side is excellent by the same gi when it is thick-walled).
In order to obtain sufficient static magnetic field shielding effect, permalloy (2
) must be used as a thick plate-like body, and therefore, when using it in the expectation of the above-mentioned static magnetic field shielding effect, especially in a device with ffI'M'c restrictions, It is not uncommon for such use to become impossible. Moreover, the above permalloy (
The metal plate made of 2) is expensive to manufacture because it contains a large amount of nickel, and has disadvantages in manufacturing and cost, such as poor L-formability and the need for special annealing treatment after forming. has been pointed out.
また上記（３）の珪素鋼からなる金属板等にあっては、
その成形性が必ずしも良好であると言えないから複雑な
形状に成形加工するととができず、しかも該成形加工に
伴ない磁気シールド性が急激に劣化するといった１５１
８点を有している。In addition, in the case of metal plates etc. made of silicon steel as described in (3) above,
151. Since the moldability is not necessarily good, it cannot be molded into a complicated shape, and furthermore, the magnetic shielding property deteriorates rapidly due to the molding process.
It has 8 points.
［発明が解決しようとする問題点］
本発明は上述の様なｌｔ情を考慮してなされたものであ
って、ｆｆｌれた静磁場シールド効果を有するばかりで
なく、重量、コスト及び成形性等においても要望を満た
すことのできる静磁場シールド材を提供しようとするも
のである。[Problems to be Solved by the Invention] The present invention has been made in consideration of the above-mentioned circumstances, and it not only has an excellent static magnetic field shielding effect, but also reduces weight, cost, moldability, etc. The present invention aims to provide a static magnetic field shielding material that can meet the needs of the industry.
し問題点を解決するための手段］
本発明に係る静磁場シールド材とは、少なくとも２枚の
磁気遮蔽金属板が非導電性樹脂を介して積層してなる点
にその要旨が存ｔＥするものである。[Means for Solving the Problems] The gist of the static magnetic field shielding material according to the present invention lies in that it is formed by laminating at least two magnetically shielding metal plates with a non-conductive resin interposed therebetween. It is.
［作用］
次に本発明の構成及び作用効果について図面を参照しつ
つ説明していく。[Operation] Next, the configuration and operation and effects of the present invention will be explained with reference to the drawings.
ｍ１図は本発明に係る静磁場シールド材の特徴的構成を
示す断面説明図である。この静磁場シールド材１は、２
枚の磁気遮蔽金属板２．３が非導電性樹脂４を介して互
いに積層されたものである。そして第２図及び第３図は
、該磁気遮蔽金属板２．３及び該非導電性樹脂４を夫々
単独で用いて磁気を遮蔽しようとした場合の断面説明図
である。末完１ｊ者等は、上記第１図〜第３図に示す様
に磁束密度Ｇガウス（以下単にＧとして記す）の静磁場
を印加して夫々の漏洩磁束密度ｇ（第１図に示す静磁場
シールド材１の漏洩磁束密度）、α（第２図に示す様に
磁気遮蔽金属板２，３を屯ねて形成される重畳磁気遮蔽
金属板自体の漏洩磁束密度）、β（第３図に示す非導電
性樹脂４自体の漏洩磁束密度）の関係について検討した
ところ、ｇくα＋βであることを知った。すなわち本発
明に係る静磁場シールド材１の静磁場遮蔽効果は、前記
重畳磁気遮蔽金属板の該遮蔽効果（Ｇ−α）と前記非導
電性樹脂の遮蔽効果（Ｇ−β）の弔なる相加的効果にｌ
Ｆまらす、それ以上の飛躍的な遮蔽効果を発揮するもの
である。この理由については概ね以下の様に考えられる
が、詳細は不明である。非導電性樹脂４を磁気遮蔽金属
板２．３の間に介装させることによって、静磁場シール
ド材１内に不？Ｊｉ続な磁場が形成されると共に、該介
装された非導電性樹脂４の作用が相乗的に発揮された結
果、漏洩磁束ｇを大幅に減少させどくα＋βを達成い得
るものと考えられる。また上記非導電性樹脂４は磁気遮
蔽金属板３の磁束からの距離を保つ言わば距離保持部材
的機能も有しているから、この距離保持によっても漏洩
磁束密度ｇの大幅な減少が可能になったものと考えられ
る。けだし磁場強度は磁極からの距離の２乗又は３東に
反比例して減少するゆえに、上記距離保持部材的機能が
漏洩磁束密度どの減少に大きく関饗したからである。Figure m1 is a cross-sectional explanatory diagram showing the characteristic structure of the static magnetic field shielding material according to the present invention. This static magnetic field shield material 1 has 2
Two magnetically shielding metal plates 2.3 are laminated with each other with a non-conductive resin 4 in between. FIGS. 2 and 3 are explanatory cross-sectional views in the case where the magnetic shielding metal plate 2.3 and the non-conductive resin 4 are used alone to shield magnetism. As shown in Figs. 1 to 3 above, those who have completed 1j apply a static magnetic field with a magnetic flux density of G Gauss (hereinafter simply referred to as G) to obtain the respective leakage magnetic flux density g (static as shown in Fig. 1). leakage magnetic flux density of the magnetic field shielding material 1), α (leakage magnetic flux density of the superimposed magnetic shielding metal plate itself formed by folding the magnetic shielding metal plates 2 and 3 as shown in Fig. 2), β (Fig. 3) As a result of studying the relationship between the leakage magnetic flux density of the non-conductive resin 4 itself shown in , it was found that g = α + β. That is, the static magnetic field shielding effect of the static magnetic field shielding material 1 according to the present invention is a phase difference between the shielding effect (G-α) of the superimposed magnetic shielding metal plate and the shielding effect (G-β) of the non-conductive resin. Additive effect
It exhibits a dramatic shielding effect that is even greater than that of F. The reason for this is thought to be as follows, but the details are unknown. By interposing the non-conductive resin 4 between the magnetic shielding metal plates 2 and 3, there is no interference within the static magnetic field shielding material 1. It is thought that as a continuous magnetic field is formed and the effects of the interposed non-conductive resin 4 are synergistically exerted, the leakage magnetic flux g can be significantly reduced and α+β can be achieved. In addition, the non-conductive resin 4 also has the function of a distance maintaining member that maintains the distance from the magnetic flux of the magnetic shielding metal plate 3, so that maintaining this distance also makes it possible to significantly reduce the leakage magnetic flux density g. It is thought that the This is because the strength of the stray magnetic field decreases in inverse proportion to the square or third power of the distance from the magnetic pole, so the function of the distance maintaining member has a large effect on the decrease in leakage magnetic flux density.
この様に本発明に係る静磁場シールド材は、これを構成
する磁気遮蔽金属板と非導電性１！１脂との相加的磁気
遮蔽効果［（Ｇ−α）＋（Ｇ−β）］よりも飛躍的に大
きい相乗的効果（Ｇ−ｇ）を有している旨記載したが、
該相乗的効果（Ｇ−ｇ）を発揮することのできるシール
ド材が磁気遮蔽金属板単独で構成されたものと仮定する
と、該磁気遮蔽金属板の板厚を［（Ｇ−α）−（Ｇ−ｇ
）］に相りする分確保しなければならず、それに伴なっ
て磁気金属遮蔽板の重積は必然的に屯くなる。これに対
し本発明では、前述の如く金属遮蔽板と非導電性樹脂を
積層することによって磁気遮蔽効果を相乗的に高めるこ
とができるので、結局間−・遮蔽効果を確保するのに必
要な静磁場シールド材を著しく軽７Ｉ：化及び低コスト
化することが可能となる。As described above, the static magnetic field shielding material according to the present invention has an additive magnetic shielding effect [(G-α)+(G-β)] between the magnetic shielding metal plate and the non-conductive 1!1 resin constituting the material. Although it was stated that it has a synergistic effect (G-g) that is dramatically greater than that of
Assuming that the shielding material capable of exerting the synergistic effect (G-g) is composed of a magnetic shielding metal plate alone, the thickness of the magnetic shielding metal plate is [(G-α)-(G -g
)], and as a result, the stack of magnetic metal shielding plates will inevitably increase. In contrast, in the present invention, as described above, the magnetic shielding effect can be synergistically enhanced by laminating the metal shielding plate and the non-conductive resin. It becomes possible to significantly reduce the weight and cost of the magnetic field shielding material.
尚以上述べてきたことを実際に検討した結果を第１表に
示す０回表中（ａ）の欄には、第４図（ａ）の状態にお
ける漏洩磁束密Ｉｆｆ ａを、一方（ｂ）の欄には、第
４図（ｂ）の状態における漏洩磁束密度すを示した。The results of actually examining the above-mentioned matters are shown in Table 1. Column (a) in the 0-times table shows the leakage magnetic flux density Iff a in the state of Fig. 4 (a), while (b) The column shows the leakage magnetic flux density in the state shown in FIG. 4(b).
第１図に示す本発明の静磁場シールド材は、１層の非導
電性樹脂を介して磁気遮蔽金属板が２層積層されたもの
であるが、該磁気遮蔽金属板を３層以上積層して静磁場
シールド材を形成しても良く、この様な場合には前述の
効果が更に倍増される。The static magnetic field shielding material of the present invention shown in Fig. 1 has two layers of magnetic shielding metal plates laminated with one layer of non-conductive resin interposed therebetween. A static magnetic field shielding material may also be formed using the same method, and in such a case, the above-mentioned effect is further doubled.
尚本発明に用いられる磁気遮蔽金属板の種類や板厚、非
導電性樹脂の種類や厚さ、及びそれらの積層数について
は本発明の前記本質的特徴に則る限り特に制限されない
が、以下に示すものが実用上好ましい、以下夫々につい
て規定根拠を踏まえつつ説明する。The type and thickness of the magnetic shielding metal plate used in the present invention, the type and thickness of the non-conductive resin, and the number of layers thereof are not particularly limited as long as they comply with the above-mentioned essential features of the present invention, but the following The following are preferred in practice, and each will be explained below based on the basis of the regulations.
（Ａ）磁気遮蔽金属板について：
（ａ）種類
一般的には透磁率が高く保磁力の小さい材料、例工ば鉄
、コバルト、ニッケル及びそれらの合金等が該当するが
、透磁率の低いアルミニウムや銅などは実際上余り用い
られていない、そして上記該当金属の中ではパーマロイ
、珪素鋼、電磁純鉄等が代表例として挙げられるが、該
パーマロイは薄肉で静磁場シールド性が劣り、又高コス
ト、成形性が悪い等の欠点がある為、この場合も実際上
余り用いられていない、この様な点を総合的に考慮する
と、純鉄を含む鋼箔、鋼板、珪素鋼板。(A) Regarding magnetic shielding metal plates: (a) Types Generally, materials with high magnetic permeability and low coercive force, such as iron, cobalt, nickel, and their alloys, etc., but aluminum with low magnetic permeability In practice, metals such as copper and copper are not used much, and typical examples of the metals mentioned above include permalloy, silicon steel, and electromagnetic pure iron. However, permalloy is thin and has poor static magnetic field shielding properties, and Considering these points comprehensively, steel foil, steel plate, and silicon steel plate containing pure iron are not used much in practice due to drawbacks such as cost and poor formability.
フェライト系ステンレス鋼又はマルテンサイト系ステン
レス鋼等が推奨される。Ferritic stainless steel or martensitic stainless steel is recommended.
（ｂ）板厚
第５図は鋼板の厚みと漏洩磁束密度の関係を示すグラフ
である。このグラフから明らかな様に鋼板の厚みが増す
につれてシールド効果は向上している。そして厚み０．
０４未満の極薄箔ではそれ自身のシールド効果が極めて
小さい（漏洩磁束密度が１００ガウス以上となり、これ
は無シールド時の５０％にもなる）為これらを数層積層
したとしても実用にかなう遮蔽板が得られ難く、またこ
の様な極薄箔は入手が困難で且つ成形性も悪い、一方１
．０ ａｒｍを超える厚肉のものでは、薄くて軽いとい
った業界の要望に答え難くなる。(b) Plate thickness FIG. 5 is a graph showing the relationship between the thickness of the steel plate and the leakage magnetic flux density. As is clear from this graph, the shielding effect improves as the thickness of the steel plate increases. And thickness 0.
Ultra-thin foils with a thickness of less than 0.04 have very little shielding effect (leakage magnetic flux density is over 100 Gauss, which is 50% of that without shielding), so even if several layers of these are laminated, it is not a practical shield. It is difficult to obtain plates, and such ultra-thin foils are also difficult to obtain and have poor formability.
．． If the thickness exceeds 0 arm, it will be difficult to meet the industry's demands for thinness and lightness.
尚該磁気遮蔽金属板として上記純鉄を含む鋼箔、鋼板、
珪素鋼板等の様な静磁場特性に大差のない金属を用いた
場合、これらの板厚はほぼ回−とみなしても良いことは
勿論である。In addition, as the magnetic shielding metal plate, steel foil, steel plate, etc. containing the above pure iron,
Of course, when metals such as silicon steel plates, which have similar static magnetic field characteristics, are used, the thicknesses of these plates can be considered to be approximately the same.
（Ｂ）非導電性樹脂について：
非導電性樹脂を用いた理由については以下の通りである
。すなわち磁気遮蔽金属板間に介装される介装材として
アルミニウム及び非導電性樹脂を選定し、両端層物のシ
ールド効果を比較したところ、第２表に示す結果が得ら
れた。(B) Regarding non-conductive resin: The reason for using non-conductive resin is as follows. That is, aluminum and non-conductive resin were selected as the intervening material interposed between the magnetic shielding metal plates, and the shielding effects of the two end layers were compared, and the results shown in Table 2 were obtained.
第２表から明らかな様に、介装材として非導電性の合成
樹脂を使用した場合の方が優れたシールド効果を示して
いることが分かる。As is clear from Table 2, it can be seen that the shielding effect is superior when a non-conductive synthetic resin is used as the intervening material.
（ａ）Ｍ類
磁気的に絶縁であり且つ非導電性の樹脂としてポリエス
テル系樹脂、ポリウレタン系樹脂、ポリプロピレン系樹
脂、ポリエチレン系樹脂、ポリカーボネート系樹脂等か
らなるフィルム又はシート或は変性ポリエチレン系熱融
着フィルム、変性ポリプロピレン系熱融着フィルム等を
挙げることができ、これらを用いることが推奨される。(a) Films or sheets made of polyester resin, polyurethane resin, polypropylene resin, polyethylene resin, polycarbonate resin, etc., or modified polyethylene heat-fused resin as M class magnetically insulating and non-conductive resin. Examples include adhesive films, modified polypropylene heat-adhesive films, etc., and it is recommended to use these.
（ｂ）厚み
第６図は磁気遮蔽金属板間に介装される非導電性樹脂の
厚みと漏洩磁束密度の関係を示すグラフである。この図
から明らかな様に厚みが増すにつれてシールド効果は略
比例的に増加していることが分かる。非導電性樹脂の厚
みが０．Ｏ１＋＊ｍ未満では、磁気遮蔽金属板との積層
による前記相乗効果が必ずしも十分に発揮されるとは限
らず２また単に磁気遮蔽金属板を２枚重ね合わせるのと
大差がなくなる他業界の要望に応えることができないこ
とも無視できるものではない。−力 １．０ ａｍを超
えると薄くて軽くて成形性・加工性・シールド性に優れ
るという業界の要望に答え難くなる。(b) Thickness FIG. 6 is a graph showing the relationship between the thickness of the non-conductive resin interposed between the magnetic shielding metal plates and the leakage magnetic flux density. As is clear from this figure, as the thickness increases, the shielding effect increases approximately proportionally. The thickness of the non-conductive resin is 0. If the temperature is less than O1+*m, the above-mentioned synergistic effect due to lamination with magnetic shielding metal plates will not necessarily be sufficiently exhibited2.In addition, it will not be much different from simply stacking two magnetic shielding metal plates, which is in response to the demands of other industries. The inability to respond cannot be ignored. - If the force exceeds 1.0 am, it becomes difficult to meet industry demands for thin, light, and excellent moldability, workability, and shielding properties.
（Ｃ）積層数について：
以しにより磁気遮蔽金属板の好ましい厚みが０．０４〜
１．０■厘、非導電性樹脂の好ましい厚みが０、ＯＬ−
１，０ｍｍと夫々規定された訳であるが、次にこれらを
組み合わせて静磁場シールド材を構成する際の積層数に
ついて説明する。第７図は該積層数（磁気遮蔽金属板の
積層数で表現する）と漏洩磁束密度の関係を示すグラフ
であるが、このグラフからＩＪＩらかな様に積層数が３
〜４程度まではその増加と共にシールド効果は急激に高
まってくるが、６層日あたりを境にしてそれ以−１−で
はシールド効果に増加傾向が余り認められなくなり、こ
れ以」―層数を増やすことは材料を浪費し或は重量や肉
厚をいたずらに大きくするだけである。従って層数につ
いては５層以下の方が好ましい。(C) Regarding the number of laminated layers: Accordingly, the preferable thickness of the magnetic shielding metal plate is 0.04~
1.0 cm, the preferred thickness of the non-conductive resin is 0, OL-
The thickness is defined as 1 and 0 mm, respectively.Next, the number of laminated layers when these are combined to form a static magnetic field shielding material will be explained. Figure 7 is a graph showing the relationship between the number of laminated layers (expressed as the number of laminated magnetic shielding metal plates) and the leakage magnetic flux density.
The shielding effect increases rapidly as the number of layers increases up to about 4, but after about 6 layers, there is no noticeable increase in the shielding effect at -1-, and from this point on, the number of layers increases. Increasing the number will only waste material or unnecessarily increase the weight and wall thickness. Therefore, the number of layers is preferably 5 or less.
以ｈ （Ａ）、（Ｂ）、（Ｃ）の結果を総合すると、（
１）磁気遮蔽金属板として純鉄を含む鋼箔、鋼板又は珪
素鋼板を用い、（２）非導電性樹脂として（Ｂ）に記載
した様な樹脂を用い。Hereafter h By combining the results of (A), (B), and (C), (
1) A steel foil, a steel plate, or a silicon steel plate containing pure iron is used as the magnetic shielding metal plate, and (2) a resin as described in (B) is used as the non-conductive resin.
（３）これらが積層状に組み合わせられた（積層散は磁
気遮蔽金属数で２〜５）、その様な静磁場シールド材で
あれば、本発明で期待する効果を有効に発揮し得るもの
である。(3) A static magnetic field shielding material in which these materials are combined in a laminated manner (the number of magnetic shielding metals in the laminated layer is 2 to 5) can effectively exhibit the effects expected by the present invention. be.
［実施例］
種々の単層シールド材と本発明に係る静磁場シールド材
のシールド特性を第３表にまとめて示す。[Example] Table 3 summarizes the shielding characteristics of various single-layer shielding materials and the static magnetic field shielding material according to the present invention.
（以ド余白）、
、、・′
−：ｌｖ’
ｔｔＳ３表におけるバ通鋼板（全体の厚さ二〇、７ａ＋
ｍ、鋼板の厚さ： ０．７ ｍｍ）とＦｅＯ’ ／Ｖ／
ＦｅＪ’ ” ／Ｖ／Ｆｅ’ ｌ （全体の厚さ：０．
７＋ｓ＋＊、鋼板の厚さ： ０．５５ｍｍ）とのシール
ド効果を比較すると以下の通りである。すなわち本発明
に係るＦ、ｅＯ１／Ｖ／ ＦｅＪｊ ｊ５／Ｖ／Ｆｅ０
１ は、普通鋼板と比較して全体の厚さが同じであり且
つ鋼板の厚さが０．１５ｍ層も薄いにもかかわらず、そ
のシールド効果は格段優れている（漏洩磁束密度２．５
→０．７５ガウス）、このことは、とりも直さすＯ，？
−０，５５＝０．１５鳳層分の非導電性樹脂を積層す
ることによってその効果が飛躍的に高められることを示
している。更にシールド効果が回−（漏洩磁束密度が３
．０ガウス）である普通鋼板とＦｅ０Ｉ５／Ｖ／ Ｆｅ
０１５との比較を行なうと以下の様になる。同一シール
ド効果を得るのに許通鋼板ではその板厚として０．５腸
鵬を賞するのに対し、ＦｅＯ”／Ｖ／ＦｅＯ”にあッテ
は０．３１１１１を有するもので十分である（但し厚さ
０４１１の非導電性樹脂が介装されている）、このこと
に鑑みても該非導電性樹脂がシールド効果に大きく関与
して飛躍的な効果を奏効していることは明らかである。(The following are blank spaces), ,,・'−:lv' ttS3 table steel plate (overall thickness 20, 7a +
m, thickness of steel plate: 0.7 mm) and FeO' /V/
FeJ'''/V/Fe' l (Total thickness: 0.
A comparison of the shielding effect with 7+s+*, steel plate thickness: 0.55 mm) is as follows. That is, F according to the present invention, eO1/V/ FeJj j5/V/Fe0
1 has a much better shielding effect (leakage magnetic flux density 2.5
→0.75 Gauss), this is also corrected.
This shows that the effect can be dramatically enhanced by laminating -0.55=0.15 layers of non-conductive resin. Furthermore, the shielding effect is increased by 3 times (leakage magnetic flux density is 3 times)
．． 0 Gauss) and ordinary steel plate and Fe0I5/V/Fe
A comparison with 015 yields the following results. To obtain the same shielding effect, a thickness of 0.5 mm is required for the steel sheet, whereas a thickness of 0.31111 for FeO"/V/FeO" is sufficient (however, In view of this fact, it is clear that the non-conductive resin is greatly involved in the shielding effect and has a dramatic effect.
［発明の効果］
本発明は以上の様に構成されているので、静磁場のシー
ルド効果を、重量、コスト、成形性等との関係において
有利に向上させることのできる静磁場シールド材を提供
することができた。[Effects of the Invention] Since the present invention is configured as described above, it provides a static magnetic field shielding material that can advantageously improve the static magnetic field shielding effect in terms of weight, cost, formability, etc. I was able to do that.
第１図は本発明に係る静磁場シールド材の特徴的構成を
示す断面説明図、第２図は第１図の磁気遮蔽金属板を重
畳した場合の断面説明図、第３図は第１図の非導電性樹
脂を示す断面説明図、第４図は第２図及び第３図を組み
合わせた状態を示す断面説明図、第５図は鋼板の厚みと
漏洩磁束密度の関係を示すグラフ、第６図は磁気遮蔽金
属板間に介装される非導電性樹脂の厚みと漏洩磁束密度
の関係を示すグラフ、第７図は積層数と漏洩磁束密度の
関係を示すグラフである。
１・・・静磁場シールド材
２．３・・・磁気遮蔽金属板
４・・・非導電性樹脂FIG. 1 is an explanatory cross-sectional view showing the characteristic structure of the static magnetic field shielding material according to the present invention, FIG. 2 is an explanatory cross-sectional view when the magnetic shielding metal plates of FIG. 1 are superimposed, and FIG. FIG. 4 is a cross-sectional explanatory diagram showing a combination of FIGS. 2 and 3. FIG. 5 is a graph showing the relationship between the thickness of the steel plate and the leakage magnetic flux density. FIG. 6 is a graph showing the relationship between the thickness of the non-conductive resin interposed between the magnetic shielding metal plates and the leakage magnetic flux density, and FIG. 7 is a graph showing the relationship between the number of laminated layers and the leakage magnetic flux density. 1... Static magnetic field shielding material 2.3... Magnetic shielding metal plate 4... Non-conductive resin
Claims (1)
して積層してなることを特徴とする静磁場シールド材。A static magnetic field shielding material comprising at least two magnetically shielding metal plates laminated with a non-conductive resin interposed therebetween.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60126874A JPS61284999A (en) | 1985-06-10 | 1985-06-10 | Magnetostatic field shielding material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60126874A JPS61284999A (en) | 1985-06-10 | 1985-06-10 | Magnetostatic field shielding material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61284999A true JPS61284999A (en) | 1986-12-15 |
Family
ID=14945978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60126874A Pending JPS61284999A (en) | 1985-06-10 | 1985-06-10 | Magnetostatic field shielding material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61284999A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016164523A (en) * | 2015-03-06 | 2016-09-08 | 株式会社タムラ製作所 | Current sensor device |
| JP2017028177A (en) * | 2015-07-24 | 2017-02-02 | 大日本印刷株式会社 | Electromagnetic wave shield laminate material and electromagnetic wave shield circuit board |
| JP2017151126A (en) * | 2017-06-13 | 2017-08-31 | 株式会社タムラ製作所 | Current sensor device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5146639U (en) * | 1974-09-17 | 1976-04-06 | ||
| JPS5316831B2 (en) * | 1974-09-09 | 1978-06-03 |
-
1985
- 1985-06-10 JP JP60126874A patent/JPS61284999A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5316831B2 (en) * | 1974-09-09 | 1978-06-03 | ||
| JPS5146639U (en) * | 1974-09-17 | 1976-04-06 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016164523A (en) * | 2015-03-06 | 2016-09-08 | 株式会社タムラ製作所 | Current sensor device |
| JP2017028177A (en) * | 2015-07-24 | 2017-02-02 | 大日本印刷株式会社 | Electromagnetic wave shield laminate material and electromagnetic wave shield circuit board |
| JP2017151126A (en) * | 2017-06-13 | 2017-08-31 | 株式会社タムラ製作所 | Current sensor device |
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