JP2003249409A - Magnetic core for coil and inductance element - Google Patents
Magnetic core for coil and inductance elementInfo
- Publication number
- JP2003249409A JP2003249409A JP2002048525A JP2002048525A JP2003249409A JP 2003249409 A JP2003249409 A JP 2003249409A JP 2002048525 A JP2002048525 A JP 2002048525A JP 2002048525 A JP2002048525 A JP 2002048525A JP 2003249409 A JP2003249409 A JP 2003249409A
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- Japan
- Prior art keywords
- magnetic core
- magnetic
- coil
- core
- plate
- 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.)
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- Coils Or Transformers For Communication (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、インダクタやトラ
ンスなどの電気・電子デバイスの構成部品であるコイル
用磁心及びそれを用いたインダクタンス素子に関するも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil magnetic core, which is a component of an electric / electronic device such as an inductor or a transformer, and an inductance element using the same.
【0002】[0002]
【従来の技術】従来、トランスなどのコイル用磁心とし
ては、図11(a)の斜視図、(b)の正面図に示すE
−E型磁心110や、図12の斜視図に示すE−I型磁
心120などが一般的に用いられている。電気・電子デ
バイスの構成部品であるコイル用磁心については、小型
化、薄型化の要求が強まってきており、図13(a)の
斜視図、(b)の正面断面図に示すドラム型磁心130
が用いられている。例えば、携帯電話用としては磁心高
さが2mm、つば131の直径が2mm、つば131の
厚さが0.5mmと薄く、非常に小さい寸法のコイル用
磁心となってきている。2. Description of the Related Art Conventionally, as a magnetic core for a coil such as a transformer, E shown in a perspective view of FIG. 11A and a front view of FIG.
The -E type magnetic core 110 and the E-I type magnetic core 120 shown in the perspective view of FIG. 12 are generally used. There is an increasing demand for miniaturization and thinning of the coil magnetic core, which is a component of the electric / electronic device, and the drum magnetic core 130 shown in the perspective view of FIG. 13A and the front sectional view of FIG.
Is used. For example, for a mobile phone, the height of the magnetic core is 2 mm, the diameter of the collar 131 is 2 mm, and the thickness of the collar 131 is as thin as 0.5 mm.
【0003】通信機器用のトランスなどに用いられる比
較的大きなポット型磁心140を、図14(a)に斜視
図、(b)に正面断面図を示す。特開平9−17192
9号公報に、トランス用のチョークコイル150におい
て、リード線の取り出し方や磁心を構成する部材の組み
合わせ方として両面テープを使用しての張り合わせによ
り、小型化を図る技術が検討されている。この磁心の正
面断面図が図15(a)および(b)であり、リード線
などの取り出し部分を簡略化している。14A shows a perspective view and FIG. 14B shows a front sectional view of a relatively large pot type magnetic core 140 used for a transformer for communication equipment. Japanese Unexamined Patent Publication No. 9-17192
In Japanese Patent Laid-Open No. 9-39, a technique for reducing the size of the choke coil 150 for a transformer is studied by using a double-sided tape as a lead wire and as a combination method of members constituting a magnetic core. Front sectional views of this magnetic core are shown in FIGS. 15 (a) and 15 (b), which simplifies the lead-out portion and the like.
【0004】[0004]
【発明が解決しようとする課題】しかしながら、図11
に示すE−E型磁心110においては、磁心を構成する
それぞれのフェライト磁心部材111,112は、焼結
後の寸法精度が異なることが多く、2つの磁心部材11
1,112を互いに対向して脚部111a,112aを
突合せした場合、磁心部材111,112のサイズが小
さくなると、脚部111a,112a同士の位置がズレ
たり、対向する脚部111a,112a間の空隙を適正
な値に調整し難くなり、安定した磁気特性のコイル用磁
心を提供できない。図12に示すE−I型磁心120に
おいても、E型磁心部材121の脚部121aとI型磁
心部材122間の空隙を適正な値に調整し難く、安定し
た磁気特性のコイル用磁心を提供できない。また、E―
E型磁心110およびE−I型磁心120に巻き線を巻
装したインダクタンス素子においては、磁心部材で外周
が覆われない裸の巻き線部分が存在し、磁気分布を無駄
なく利用できておらず、小型化が不十分である。However, as shown in FIG.
In the EE type magnetic core 110 shown in FIG. 2, the respective ferrite magnetic core members 111 and 112 forming the magnetic core often have different dimensional accuracy after sintering, and the two magnetic core members 11
When the leg portions 111a and 112a are butted against each other when the magnetic core members 111 and 112 are small in size, the leg portions 111a and 112a are displaced from each other, or the leg portions 111a and 112a are opposed to each other. It becomes difficult to adjust the air gap to an appropriate value, and it is not possible to provide a coil core having stable magnetic characteristics. Also in the E-I type magnetic core 120 shown in FIG. 12, it is difficult to adjust the gap between the leg portion 121a of the E type magnetic core member 121 and the I type magnetic core member 122 to an appropriate value, and a coil magnetic core having stable magnetic characteristics is provided. Can not. Also, E-
In the inductance element in which the winding is wound around the E-type magnetic core 110 and the E-I-type magnetic core 120, there is a bare winding portion whose outer periphery is not covered by the magnetic core member, and the magnetic distribution cannot be utilized without waste. , Miniaturization is insufficient.
【0005】図13に示すドラム型磁心130は、円柱
状のものを切削加工して巻き線133を巻く芯部132
を形成するために、磁心の小型化などによりつば131
の部分の厚さが減少するに伴い、機械的強度が低下し、
加工中に欠けが発生し易く、歩留まりが低下するという
問題がある。また、切削加工後形成された芯部132
に、巻き線133を巻回する時にもつば131に欠けが
生じる場合もあった。図14に示すポット型磁心140
においては、上、下平板状磁心部材141,142の中
央に配置される柱状部141a,142a間の空隙も、
E−E型磁心110と同様に適正な値に調整し難く、安
定した磁気特性を有するコイル用磁心を提供することが
できない。A drum type magnetic core 130 shown in FIG. 13 is formed by cutting a cylindrical body to wind a winding wire 133 around a core portion 132.
To form the collar 131 by reducing the size of the magnetic core.
As the thickness of the part decreases, the mechanical strength decreases,
There is a problem that chipping is likely to occur during processing and the yield is reduced. Further, the core portion 132 formed after cutting
In addition, when the winding 133 is wound, the tangle 131 may be chipped. The pot type magnetic core 140 shown in FIG.
In the above, the space between the columnar portions 141a and 142a arranged in the center of the upper and lower flat plate-shaped magnetic core members 141 and 142 is also
As with the E-E type magnetic core 110, it is difficult to adjust to an appropriate value, and it is not possible to provide a coil magnetic core having stable magnetic characteristics.
【0006】図15に示す特開平9−171929号公
報に記載する技術は、下部磁心部材152に上部磁心部
材151をのせ、両面テープ154で固定する構造であ
り、両方の磁心部材151,152の空隙部分の面積が
小さい、つまり下部磁心部材152の上部磁心部材15
1との対抗面の面積が小さいことから十分に磁束を通す
ことができず、コイル用磁心の小型化を達成することが
できない。The technique disclosed in Japanese Patent Application Laid-Open No. 9-171929 shown in FIG. 15 has a structure in which an upper magnetic core member 151 is placed on a lower magnetic core member 152 and fixed with a double-sided tape 154. The area of the void portion is small, that is, the upper magnetic core member 15 of the lower magnetic core member 152.
Since the area of the surface facing 1 is small, the magnetic flux cannot be sufficiently passed, and the size of the coil core cannot be reduced.
【0007】本発明は、このような問題点を解消するた
めになされたもので、磁心を複数の磁心部材で構成し、
かつこの組み合わせ方法を工夫して、磁心自体の磁気特
性を向上させ小型化したコイル用磁心とこの磁心を用い
たインダクタンス素子の提供を目的としている。さら
に、複数の磁心部材を組み合わせたときの磁心部材間の
空隙に起因する磁束の漏れを抑制し、通過磁束量を増加
させたコイル用磁心とこの磁心を用いたインダクタンス
素子の提供を目的としている。The present invention has been made in order to solve such problems, and the magnetic core is composed of a plurality of magnetic core members,
Moreover, it is an object of the present invention to provide a magnetic core for a coil, which is improved by improving the magnetic characteristics of the magnetic core itself, and an inductance element using this magnetic core, by devising this combination method. Furthermore, it is an object of the present invention to provide a magnetic core for a coil in which leakage of magnetic flux due to a gap between magnetic core members when a plurality of magnetic core members are combined is suppressed and an amount of passing magnetic flux is increased, and an inductance element using this magnetic core. .
【0008】[0008]
【課題を解決するための手段】本発明者らは、コイル用
磁心について磁心のどの部分を有効に磁束が通っている
かを検討した。その結果、磁心を複数の磁心部材から構
成し、かつ組み合わせ方を特定することにより巻き線が
外部に露出せず、かつ閉磁路を形成することのできるコ
イル用磁心を着想した。このコイル用磁心は、磁心自体
が有する磁気特性を無駄なく利用できるため、磁気特性
に優れた小型化したコイル用磁心とこれを用いたインダ
クタンス素子が提供される。DISCLOSURE OF THE INVENTION The inventors of the present invention have examined which part of the magnetic core the magnetic flux effectively passes through in the coil magnetic core. As a result, the inventor has conceived a magnetic core for a coil, which is composed of a plurality of magnetic core members, and by specifying the combination method, the winding is not exposed to the outside and a closed magnetic circuit can be formed. Since this coil magnetic core can utilize the magnetic characteristics of the magnetic core itself without waste, a miniaturized coil magnetic core excellent in magnetic characteristics and an inductance element using the same are provided.
【0009】本発明はかかる知見に基づいてなされたも
のであって、第1の板状部と前記第1の板状部の中央部
に立設する柱状芯部とを有する第1の磁心部材と、前記
柱状芯部が嵌装される貫通孔をその中央部に有する第2
の板状部と前記第2の板状部の周囲から垂下する外筒部
とを有する第2の磁心部材とを備えたことを特徴とする
コイル用磁心である。本発明のコイル用磁心は、第1の
磁心部材の柱状芯部が、第2の磁心部材の貫通孔に嵌装
し、かつ第2の磁心部材の外筒部の先端を第1の磁心部
材の第1の板状部に接触するように組み合わせることが
できる。そうすると、巻き線は、柱状芯部と外筒部との
間に形成される空間に配設されるため、外部に露出しな
い。しかも、第1の板状部、柱状芯部、第2の板状部、
外筒部および第1の板状部(またはこの逆)という順に
閉磁路が形成される。本発明のコイル用磁心において、
前記柱状芯部と前記貫通孔との間に形成される空隙を覆
う磁性部材を備えることが望ましい。本発明のコイル用
磁心は、前記空隙が50μm以下の範囲で、従来のドラ
ム型磁心より優れた磁気特性を有することができる。な
お、空隙を覆う磁性部材としては、軟磁性材料を含むシ
ートとすることが、小型化の要請にとって望ましい。本
発明のコイル用磁心を構成する第1の磁心部材と第2の
磁心部材は、ともにフェライト焼結体から構成すること
ができるし、また、第1の磁心部材をフェライト焼結体
から構成し、第2の磁心部材を軟磁性材料から構成する
こともできる。The present invention has been made on the basis of such findings, and a first magnetic core member having a first plate-shaped portion and a columnar core portion standing upright in the central portion of the first plate-shaped portion. And a second hole having a through hole into which the columnar core is fitted, in a central portion thereof.
And a second magnetic core member having a plate-shaped portion and an outer cylindrical portion that hangs from the periphery of the second plate-shaped portion. In the coil magnetic core of the present invention, the columnar core portion of the first magnetic core member is fitted into the through hole of the second magnetic core member, and the tip of the outer cylindrical portion of the second magnetic core member is the first magnetic core member. Can be combined to contact the first plate-shaped portion of the. Then, since the winding wire is arranged in the space formed between the columnar core portion and the outer cylinder portion, the winding wire is not exposed to the outside. Moreover, the first plate-shaped portion, the columnar core portion, the second plate-shaped portion,
A closed magnetic circuit is formed in the order of the outer cylinder portion and the first plate-shaped portion (or vice versa). In the coil core of the present invention,
It is desirable to provide a magnetic member that covers a gap formed between the columnar core portion and the through hole. The coil magnetic core of the present invention can have magnetic characteristics superior to those of the conventional drum type magnetic core in the range where the gap is 50 μm or less. A sheet containing a soft magnetic material is preferably used as the magnetic member for covering the voids in order to reduce the size. The first magnetic core member and the second magnetic core member that compose the coil magnetic core of the present invention can both be made of a ferrite sintered body, and the first magnetic core member can be made of a ferrite sintered body. The second magnetic core member may be made of a soft magnetic material.
【0010】本発明では、以上のコイル用磁心を用いた
インダクタンス素子をも提供する。このインダクタンス
素子は、第1の板状部と前記第1の板状部の中央部に立
設する柱状芯部とを有する第1の磁心部材と、前記柱状
芯部が嵌装される貫通孔をその中央部に有する第2の板
状部と前記第2の板状部の周囲から垂下する外筒部とを
有する第2の磁心部材とを備えたコイル用磁心と、前記
柱状芯部の外周に巻装された巻き線とを備えたことを特
徴とする。本発明のインダクタンス素子において、前記
巻き線は、前記柱状芯部と前記外筒部との間に形成され
る空間に配設される。したがって、巻き線は、外部に露
出しないことになる。The present invention also provides an inductance element using the above coil core. This inductance element includes a first magnetic core member having a first plate-shaped portion and a columnar core portion standing upright in the center of the first plate-shaped portion, and a through hole into which the columnar core portion is fitted. A coil magnetic core including a second magnetic core member having a second plate-shaped portion having a central portion thereof and an outer tubular portion hanging from the periphery of the second plate-shaped portion; And a winding wire wound around the outer circumference. In the inductance element of the present invention, the winding is arranged in a space formed between the columnar core and the outer cylinder. Therefore, the winding wire is not exposed to the outside.
【0011】[0011]
【発明の実施の形態】以下、本発明のコイル用磁心、イ
ンダクタンス素子およびその製造方法の実施の形態につ
いて、添付図面を参照して説明する。なお、この実施の
形態により本発明が限定されるものではない。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a coil magnetic core, an inductance element and a method of manufacturing the same according to the present invention will be described below with reference to the accompanying drawings. The present invention is not limited to this embodiment.
【0012】(第1の実施の形態)図1は凸形状の第1
の磁心部材10(例えば、フェライト焼結体から構成さ
れる)と凹形状の第2の磁心部材20(例えば、フェラ
イト焼結体から構成される)を組み合わせた本発明のコ
イル用磁心1に巻き線30を巻装した本発明の1実施の
形態によるインダクタンス素子を示す。図1(a)は第
1の実施の形態によるインダクタンス素子の正面断面図
であり、(b)はその組み立て斜視図(コイルは省略)
である。また図2は、その組み立て手順を示す正面断面
図である。(First Embodiment) FIG. 1 shows a first convex shape.
The coil core 1 of the present invention in which the magnetic core member 10 (for example, made of a ferrite sintered body) and the second concave magnetic core member 20 (for example, made of a ferrite sintered body) are combined together is wound. 1 shows an inductance element according to an embodiment of the present invention in which a wire 30 is wound. FIG. 1A is a front sectional view of an inductance element according to the first embodiment, and FIG. 1B is an assembled perspective view thereof (coil is omitted).
Is. FIG. 2 is a front sectional view showing the assembling procedure.
【0013】第1の実施の形態によるコイル用磁心1
は、中央部に立設した柱状芯部11を有し、柱状芯部1
1と一体である第1の板状部12を有する凸形状の第1
の磁心部材10と、中央部に貫通孔Aを有する第2の板
状部21と第2の板状部21と一体である外筒部22を
有する凹形状の第2の磁心部材20から構成されてい
る。外筒部22は、円形の第2の板状部21の周囲から
垂下している。第1の磁心部材10の柱状芯部11の先
端が、第2の磁心部材20の貫通孔Aに嵌装され、コイ
ル用磁心1として機能する。柱状芯部11と貫通孔Aと
の間には、リング状の空隙Gが形成される。第1の実施
の形態によるコイル用磁心1は、第1の磁心部材10と
第2の磁心部材20を以上のように組み合わせることに
より、第1の板状部12、柱状芯部11、第2の板状部
21、外筒部22および第1の板状部12による閉磁路
を形成する。閉磁路が形成されるために、後述する実施
例で示すように、コイル用磁心1の磁気特性が向上す
る。また、第1の磁心部材10の柱状芯部11と第2の
磁心部材20の外筒部22との間にはリング状の空間が
形成される。柱状芯部11の外周部には巻き線30を巻
装してインダクタンス素子を構成するが、巻き線30
は、前記空間内に配設されることになる。したがって、
引き出し部分を除いて、巻き線30は外部に露出しな
い。なお、本発明において、柱状芯部11について立設
と表現し、また外筒部22については垂下と表現してい
るが、これは第1の板状部12が下方に、また第2の板
上部21が上方に配置された状態を基準としている。The coil magnetic core 1 according to the first embodiment.
Has a columnar core portion 11 provided upright in the center, and the columnar core portion 1
1 having a convex shape having a first plate-shaped portion 12 that is integral with the first
Magnetic core member 10 and a concave second magnetic core member 20 having a second plate-shaped portion 21 having a through hole A in the center and an outer tubular portion 22 integrated with the second plate-shaped portion 21. Has been done. The outer cylinder portion 22 hangs from the periphery of the circular second plate-shaped portion 21. The tip of the columnar core portion 11 of the first magnetic core member 10 is fitted into the through hole A of the second magnetic core member 20 and functions as the coil magnetic core 1. A ring-shaped gap G is formed between the columnar core 11 and the through hole A. The coil magnetic core 1 according to the first embodiment is obtained by combining the first magnetic core member 10 and the second magnetic core member 20 as described above, so that the first plate portion 12, the columnar core portion 11, and the second core portion 11 A closed magnetic circuit is formed by the plate-shaped portion 21, the outer cylindrical portion 22, and the first plate-shaped portion 12. Since the closed magnetic circuit is formed, the magnetic characteristics of the coil core 1 are improved, as will be shown in Examples described later. In addition, a ring-shaped space is formed between the columnar core portion 11 of the first magnetic core member 10 and the outer cylindrical portion 22 of the second magnetic core member 20. A winding wire 30 is wound around the outer circumference of the columnar core 11 to form an inductance element.
Will be disposed in the space. Therefore,
The winding wire 30 is not exposed to the outside except for the lead-out portion. In the present invention, the columnar core portion 11 is expressed as standing and the outer cylinder portion 22 is expressed as hanging. This means that the first plate-like portion 12 is downward and the second plate-like portion is downward. It is based on the state that the upper portion 21 is arranged above.
【0014】第1の実施の形態によるインダクタンス素
子を得るためには、まず、第1の磁心部材10および第
2の磁心部材20を各々製造する。第1の磁心部材10
および第2の磁心部材20は、前述のように、フェライ
ト焼結体から構成されている。したがって、原料粉末の
成形、焼結および加工を要旨とする公知の方法によっ
て、第1の磁心部材10および第2の磁心部材20を作
成する。本発明は、用いるフェライト焼結体の材質を特
定することはなく、公知あるいは今後開発される全ての
フェライト焼結体を適用することができる。第1の磁心
部材10および第2の磁心部材20を作成したならば、
図2に示すように、第1の磁心部材10の柱状芯部11
に巻き線30を巻装する。予め巻き回された巻き線30
を作成し、この巻き線30を柱状芯部11の外周に配設
することができる。その後、第1の磁心部材10の柱状
芯部11を第2の磁心部材20の貫通孔Aに嵌装するこ
とにより、第1の実施の形態によるインダクタンス素子
が得られる。In order to obtain the inductance element according to the first embodiment, first, the first magnetic core member 10 and the second magnetic core member 20 are manufactured. First magnetic core member 10
The second magnetic core member 20 is made of a ferrite sintered body as described above. Therefore, the first magnetic core member 10 and the second magnetic core member 20 are prepared by a known method whose main points are forming, sintering and processing of the raw material powder. The present invention does not specify the material of the ferrite sintered body to be used, and all known or later developed ferrite sintered bodies can be applied. If the first magnetic core member 10 and the second magnetic core member 20 are created,
As shown in FIG. 2, the columnar core portion 11 of the first magnetic core member 10
The winding wire 30 is wound around. Pre-wound winding 30
And the winding 30 can be arranged on the outer periphery of the columnar core 11. Then, the columnar core portion 11 of the first magnetic core member 10 is fitted into the through hole A of the second magnetic core member 20 to obtain the inductance element according to the first embodiment.
【0015】コイル用磁心1によれば、第1の磁心部材
10の柱状芯部11が第2の磁心部材20の貫通孔Aに
嵌装された部分における、柱状芯部11と第2の板状部
21とが対向する面の面積を十分に取ることができる。
そのために、柱状芯部11と第2の板状部21との間に
十分な磁束を通すことができる。したがって、コイル用
磁心1自体の磁気特性を無駄なく利用することで、図1
3に示す従来のドラム型磁心130よりも磁気特性(通
過磁束量)を向上させることができる。このことは、同
じ特性を得るのであれば、第1の実施の形態によるコイ
ル用磁心1は、ドラム型磁心130より小型化すること
ができることを示唆している。第1の実施の形態では、
円板状の第1の板状部12と第2の板状部21の例を示
したが、円板状に限定されず例えば図16に示すよう
に、矩形、その他の形状の板状部とすることもできる。
また、柱状芯部11としては、束ねた巻き線30の巻装
がし易い円柱状芯部の例を示したが、これに限定され
ず、角柱状芯部など他の形状の柱状芯部でもよい。また
第1の実施の形態においては、第1の磁心部材10と第
2の磁心部材20の両者をフェライト焼結体により構成
したが、第1の磁心部材10をフェライト焼結体、第2
の磁心部材20を軟磁性材料から構成することもでき
る。According to the coil magnetic core 1, the columnar core portion 11 and the second plate in the portion where the columnar core portion 11 of the first magnetic core member 10 is fitted in the through hole A of the second magnetic core member 20. The area of the surface facing the shape portion 21 can be sufficiently taken.
Therefore, sufficient magnetic flux can be passed between the columnar core portion 11 and the second plate-shaped portion 21. Therefore, by utilizing the magnetic characteristics of the coil magnetic core 1 itself without waste,
The magnetic characteristics (passing magnetic flux amount) can be improved as compared with the conventional drum type magnetic core 130 shown in FIG. This suggests that the coil magnetic core 1 according to the first embodiment can be made smaller than the drum type magnetic core 130 if the same characteristics are obtained. In the first embodiment,
Although the example of the disk-shaped first plate-shaped portion 12 and the second plate-shaped portion 21 is shown, the disk-shaped portion is not limited to the disk-shaped, and, for example, as shown in FIG. Can also be
Further, as the columnar core 11, an example of a columnar core in which the bundled winding wires 30 can be easily wound is shown, but the columnar core 11 is not limited to this, and a columnar core having another shape such as a prismatic core may be used. Good. In addition, in the first embodiment, both the first magnetic core member 10 and the second magnetic core member 20 are made of a ferrite sintered body, but the first magnetic core member 10 is made of a ferrite sintered body, and
The magnetic core member 20 can be made of a soft magnetic material.
【0016】(第2の実施の形態)以下本発明による第
2の実施の形態について説明する。図3は第2の実施の
形態によるコイル用磁心1を示す正面断面図である。第
2の実施の形態によるコイル用磁心1は、第1の実施の
形態によるコイル用磁心1の性能をさらに向上するため
に、磁束の漏れを抑制してコイル用磁心1内を通過する
磁束量を増加するように空隙Gを覆う磁性部材40を配
置している。また、図4に第2の実施の形態によるコイ
ル用磁心1の組み立て手順を示す。なお、図3および図
4において、図1および図2と同一部分には同一の符号
を付してその説明を省略する。(Second Embodiment) A second embodiment of the present invention will be described below. FIG. 3 is a front sectional view showing the coil magnetic core 1 according to the second embodiment. In order to further improve the performance of the coil magnetic core 1 according to the first embodiment, the coil magnetic core 1 according to the second embodiment suppresses leakage of magnetic flux and passes through the coil magnetic core 1 with the amount of magnetic flux. The magnetic member 40 that covers the gap G is arranged so as to increase. Further, FIG. 4 shows an assembling procedure of the coil magnetic core 1 according to the second embodiment. In FIGS. 3 and 4, the same parts as those in FIGS. 1 and 2 are designated by the same reference numerals, and the description thereof will be omitted.
【0017】第1の実施の形態でも説明したように、第
1の磁心部材10と第2の磁心部材20間にリング状の
空隙Gが形成される。この空隙Gは、第1の磁心部材1
0および第2の磁心部材20の製造誤差等に起因する。
そして、この空隙Gの部分から磁束が外部に漏れるため
に、コイル用磁心1内を通過する磁束量が減少する。第
1の実施の形態によるコイル用磁心1は、一般的に実用
化されているドラム型磁心130よりも性能が向上する
ことにより小型化はできるが、空隙Gによる漏れ磁束の
影響を抑制するために、第2の実施の形態では、空隙G
を覆うように磁性部材40(磁心の材質と同程度の軟磁
気特性、より具体的には透磁率を具備する材料)を配置
する。具体的には、軟磁性材料を含むシートを空隙Gを
覆うように両面テープあるいは接着剤を用いて第2の磁
心部材20に貼り付ける。そうすることにより、空隙G
から磁束が漏れてもこのシート内を通過して第1の磁心
部材10または第2の磁心部材20に磁束が回帰するた
めに、大幅な性能向上(通過磁束量の増加)が達成で
き、その分小型化が可能になる。軟磁性材料としては、
パーマロイ、フェライトを用いることができる。As described in the first embodiment, the ring-shaped gap G is formed between the first magnetic core member 10 and the second magnetic core member 20. This gap G is formed by the first magnetic core member 1
0 and the manufacturing error of the second magnetic core member 20.
Then, since the magnetic flux leaks from the portion of the air gap G, the amount of magnetic flux passing through the coil magnetic core 1 decreases. The coil magnetic core 1 according to the first embodiment can be downsized because the performance is improved as compared with the commonly used drum type magnetic core 130, but the influence of the leakage magnetic flux due to the air gap G is suppressed. In the second embodiment, the gap G
The magnetic member 40 (a material having a soft magnetic characteristic similar to that of the material of the magnetic core, more specifically, a material having magnetic permeability) is arranged so as to cover the. Specifically, a sheet containing a soft magnetic material is attached to the second magnetic core member 20 using a double-sided tape or an adhesive so as to cover the gap G. By doing so, the gap G
Even if the magnetic flux leaks from the sheet, the magnetic flux passes through the sheet and returns to the first magnetic core member 10 or the second magnetic core member 20, so that a significant performance improvement (increase in the amount of passing magnetic flux) can be achieved. The size can be reduced accordingly. As a soft magnetic material,
Permalloy and ferrite can be used.
【0018】以上の例では、磁性部材40を、第2の板
状部21と同程度の面積を有する円形のものとしたが、
リング状の空隙Gを覆うことができれば、その大きさ、
形状は問わない。また、第2の実施の形態では、好まし
い例として軟磁性材料のシートについて記載したが、磁
束の漏れを抑制して通過磁束量を高めるためには軟磁性
材料以外の磁性材料を用いることもできる。In the above example, the magnetic member 40 has a circular shape having an area similar to that of the second plate-like portion 21, but
If the ring-shaped void G can be covered, its size,
The shape does not matter. Further, in the second embodiment, the sheet of the soft magnetic material has been described as a preferable example, but a magnetic material other than the soft magnetic material may be used in order to suppress the leakage of the magnetic flux and increase the passing magnetic flux amount. .
【0019】[0019]
【実施例】図13に示すドラム型磁心130を用いて測
定した磁気特性について説明する。ドラム型磁心130
は、直径2mm、高さ2mm、巻き線133を巻装する
芯部132の直径を1mm、つば131の厚さを0.5
mmとした。磁界解析は有限要素法で行った。EXAMPLE The magnetic characteristics measured using the drum type magnetic core 130 shown in FIG. 13 will be described. Drum type magnetic core 130
Has a diameter of 2 mm, a height of 2 mm, a diameter of the core portion 132 around which the winding 133 is wound is 1 mm, and a thickness of the collar 131 is 0.5.
mm. The magnetic field analysis was performed by the finite element method.
【0020】つば131の厚さを0.5mmに固定して
磁心の高さを3〜1.5mmの範囲で変動させたとき、
また高さを1.5mmに固定してつば131の厚さを
0.5〜0.1mmの範囲で変動させたときの磁束密度
の半径方向における分布を測定した。このときの巻き線
133の領域は高さ0.5mm、幅0.5mmである。
その結果、磁束密度は巻き線133とつば131との間
に空隙がなくなったときが最大となり、つば131の厚
さが薄くなると減少することが確認された。すなわち、
磁心の高さの変化に対しては、磁心中の磁束が効率よく
ループを作るには巻き線133の上下に空隙がないこと
が望ましいことがわかった。磁心の小型化には、高さと
面積の観点から検討できるが、表面実装部品としては高
さがより重要な要素であることから、磁心高さを1.5
mmとした場合の他の寸法、形状の検討を行った。When the thickness of the collar 131 is fixed to 0.5 mm and the height of the magnetic core is varied within the range of 3 to 1.5 mm,
Further, the distribution of the magnetic flux density in the radial direction was measured when the height was fixed to 1.5 mm and the thickness of the collar 131 was varied in the range of 0.5 to 0.1 mm. The area of the winding 133 at this time has a height of 0.5 mm and a width of 0.5 mm.
As a result, it was confirmed that the magnetic flux density reaches its maximum when there is no air gap between the winding 133 and the collar 131, and decreases when the thickness of the collar 131 is thin. That is,
It has been found that it is desirable that there be no gap above and below the winding 133 in order for the magnetic flux in the magnetic core to efficiently form a loop with respect to changes in the height of the magnetic core. A magnetic core can be downsized from the viewpoints of height and area, but since the height is a more important factor for surface mount components, the magnetic core height is 1.5
Other dimensions and shapes when mm was examined.
【0021】図13に示す従来のドラム型磁心130に
ついて、図5に示すようにつば131の厚さを0.65
mm、巻き線133部分の高さを0.2mm、すなわち
磁心高さを1.5mmとし、つば131の幅を0.5〜
1.5mmの範囲で変動させたときのドラム型磁心13
0の半径方向における磁束密度の分布を測定した。この
とき巻き線133の幅は0.5mmで固定した。結果を
図6に示す。なお、図6において、横軸がドラム型磁心
130の中心軸から半径方向の位置、縦軸が磁束密度を
示している。図6より、つば131の幅が大きくなるほ
ど磁束密度が増加することがわかる。また、図7は、つ
ば131の厚さを0.65mm、巻き線133部分の高
さを0.2mm(磁心高さを1.5mm)、つば131
の幅を1.5mmとし、巻き線133の幅を0.5mm
および1.5mmの2種類として、同様に磁束密度を測
定した結果を示している。図7に示すように、巻き線1
33の幅を1.5mmとしてつば131の周縁までいっ
ぱい巻き線133を巻くと磁束密度が減少することが確
認された。このことより、磁束のループを効率よく作る
には巻き線133の外周よりも外側までつば131を突
出させることが望ましいことがわかる。Regarding the conventional drum type magnetic core 130 shown in FIG. 13, the thickness of the collar 131 is 0.65 as shown in FIG.
mm, the height of the winding 133 portion is 0.2 mm, that is, the height of the magnetic core is 1.5 mm, and the width of the collar 131 is 0.5 to 0.5 mm.
Drum type magnetic core 13 when fluctuating within a range of 1.5 mm
The distribution of the magnetic flux density in the radial direction of 0 was measured. At this time, the width of the winding 133 was fixed at 0.5 mm. Results are shown in FIG. In FIG. 6, the horizontal axis indicates the position in the radial direction from the central axis of the drum type magnetic core 130, and the vertical axis indicates the magnetic flux density. It can be seen from FIG. 6 that the magnetic flux density increases as the width of the collar 131 increases. Further, in FIG. 7, the thickness of the collar 131 is 0.65 mm, the height of the winding 133 portion is 0.2 mm (the magnetic core height is 1.5 mm), and the collar 131 is
The width of the winding 133 is 0.5 mm, and the width of the winding 133 is 0.5 mm.
Also, the results of similarly measuring the magnetic flux density are shown for two types of 1.5 mm and 1.5 mm. As shown in FIG. 7, winding 1
It was confirmed that when the width of 33 is set to 1.5 mm and the winding 133 is wound up to the peripheral edge of the collar 131, the magnetic flux density is reduced. From this, it is understood that it is desirable to project the collar 131 to the outside of the outer circumference of the winding 133 in order to efficiently create a magnetic flux loop.
【0022】次に、携帯電話用として実用化されている
最も小型と思われるドラム型磁心130として、高さ
1.5mm、直径3mm、つば131の厚さ0.65m
m、磁心の芯部132の直径1mmの磁心を用い、本発
明のコイル用磁心1(図1)との比較を行った。このと
きの巻き線133部分は高さ0.2mm、幅0.5mm
とした。この従来のドラム型磁心130の中心に位置す
る断面を通過する磁束量は4.95×10-8Wbであ
る。Next, a drum type magnetic core 130, which is considered to be the smallest in practical use for mobile phones, has a height of 1.5 mm, a diameter of 3 mm, and a collar 131 having a thickness of 0.65 m.
m, and a core having a diameter of 1 mm of the core portion 132 of the core was used for comparison with the coil core 1 (FIG. 1) of the present invention. The winding 133 at this time has a height of 0.2 mm and a width of 0.5 mm.
And The amount of magnetic flux passing through the cross section located at the center of the conventional drum type magnetic core 130 is 4.95 × 10 −8 Wb.
【0023】本発明のコイル用磁心1の最適形状、寸法
を確認するために、次の4種類コイル用磁心を作成して
その磁気特性を測定した。その結果を図8に示す。な
お、図中のは上述した通常のドラム型磁心130、
はドラム型磁心130を上下のつば131の部分、芯部
132の部分、巻き線133外の部分を加えた4つの磁
心部材を組み合わせた磁心、は図1に示した凸形状と
凹形状の2つの磁心部材を組み合わせた本発明によるコ
イル用磁心1、は本発明によるコイル用磁心1と同形
状の磁心を一体で構成した場合の結果を示す。なお、
は、一体で構成されたものであるから、本発明によるコ
イル用磁心1では不可避の空隙Gは存在しないものの、
巻き線を施すことができない。つまり、空隙Gを有しな
い理想的な磁心の磁気特性を示すために測定対象とし
た。なお、〜の磁心における空隙Gは全て10μm
とした。In order to confirm the optimum shape and dimensions of the coil core 1 of the present invention, the following four types of coil cores were prepared and their magnetic characteristics were measured. The result is shown in FIG. In the figure, is the above-mentioned normal drum type magnetic core 130,
Is a magnetic core obtained by combining the drum-shaped magnetic core 130 with four upper and lower flanges 131, a core 132, and a portion outside the winding 133, and is a convex or concave shape shown in FIG. A coil magnetic core 1 according to the present invention in which two magnetic core members are combined shows the result when a magnetic core having the same shape as the coil magnetic core 1 according to the present invention is integrally formed. In addition,
Is integrally formed, so that there is no unavoidable gap G in the coil core 1 according to the present invention,
Can not be wound. That is, the measurement target was used to show the magnetic characteristics of an ideal magnetic core having no gap G. In addition, all the air gaps G in the magnetic cores of 10 μm
And
【0024】図8より、従来のドラム型磁心130
()に比べて、凸形状と凹形状の2つの磁心部材を組
み合わせた本発明のコイル用磁心1()は、空隙Gが
あっても磁路を閉じることで磁気特性を大幅に向上でき
ることがわかる。また、本発明のコイル用磁心1は、2
つの凸形状と凹形状の磁心部材で構成するようにしたこ
とで、従来のドラム型磁心130のように円柱体からの
難しい切削加工をする必要がなく、磁心製造時の歩留ま
りを低下させることなく、かつ通過磁束量を向上でき
る。From FIG. 8, the conventional drum type magnetic core 130 is shown.
Compared with (), the coil magnetic core 1 () of the present invention in which two magnetic core members having a convex shape and a concave shape are combined can significantly improve the magnetic characteristics by closing the magnetic path even if there is a gap G. Recognize. In addition, the coil core 1 of the present invention is 2
Since the magnetic core member is formed of two convex and concave magnetic core members, unlike the conventional drum-type magnetic core 130, it is not necessary to perform difficult cutting work from a cylindrical body, and the yield at the time of manufacturing the magnetic core is not reduced. In addition, the amount of passing magnetic flux can be improved.
【0025】本発明の構成のコイル用磁心1において、
空隙Gの値を変動させたときの柱状芯部の断面を通過す
る磁束量の変化を図9に示す。ここで空隙Gとは、凸形
状の第1の磁心部材10の柱状芯部11の先端外周と凹
形状の第2の磁心部材20の貫通孔Aとの嵌装部分にお
ける隙間をいう。図9より、本発明のコイル用磁心1は
従来のドラム型磁心130の4.95×10-8Wbと比
してはるかに優れた磁気特性を有しており、空隙Gが同
じ10μmでは約3倍の磁束量を得ており、また空隙G
が50μmの範囲までは10μmの空隙Gのドラム型磁
心130の特性を凌駕している。In the coil core 1 having the structure of the present invention,
FIG. 9 shows a change in the amount of magnetic flux passing through the cross section of the columnar core when the value of the gap G is changed. Here, the gap G refers to a gap in the fitting portion between the outer circumference of the tip of the columnar core portion 11 of the first magnetic core member 10 having a convex shape and the through hole A of the second magnetic core member 20 having a concave shape. As shown in FIG. 9, the coil magnetic core 1 of the present invention has far superior magnetic characteristics as compared with the conventional drum-shaped magnetic core 130 of 4.95 × 10 −8 Wb. The amount of magnetic flux is tripled and the air gap G
Up to the range of 50 μm, the characteristics of the drum type magnetic core 130 having the gap G of 10 μm are exceeded.
【0026】次に、本発明のコイル用磁心1の空隙Gを
10μmとして、磁心高さを変えたときの柱状芯部の断
面を通過する磁束量の変化を図10に示す。図10より
本発明のコイル用磁心1は、従来の磁心高さが1.5m
mのドラム型磁心130と比してはるかに優れた磁気特
性を有しており、磁心高さが同じ1.5mmでは3倍の
磁束量を得ている。磁心高さを0.5mmまで小さくし
ても1.5mmの磁心高さのドラム型磁心130の特性
を凌駕している。本発明のコイル用磁心1は、同じ磁気
特性であればサイズを従来のドラム型磁心130の2分
の1以下のサイズまで小型化できることがわかる。Next, FIG. 10 shows the change in the amount of magnetic flux passing through the cross section of the columnar core portion when the height of the magnetic core is changed with the gap G of the coil core 1 of the present invention set to 10 μm. As shown in FIG. 10, the coil core 1 of the present invention has a conventional magnetic core height of 1.5 m.
The magnetic characteristics are far superior to those of the drum type magnetic core 130 of m, and the magnetic flux amount is tripled when the magnetic core height is 1.5 mm. Even if the magnetic core height is reduced to 0.5 mm, the characteristics of the drum type magnetic core 130 having a magnetic core height of 1.5 mm are surpassed. It can be seen that the coil magnetic core 1 of the present invention can be downsized to a size that is half or less the size of the conventional drum type magnetic core 130 if the magnetic characteristics are the same.
【0027】上述した実施例では、柱状芯部11を有す
る凸形状の第1の磁心部材10と中央部に貫通孔Aを有
する凹形状の第2の磁心部材20の組み合わせからなる
コイル用磁心1について説明した。しかし、第2の磁心
部材20の第2の板状部21の上面に貫通孔Aより大き
いサイズの厚さ10μmの軟磁性材料から構成されるシ
ート(厚さ10μmの接着剤層にて貼り付け)を柱状芯
部11の先端と貫通孔Aとの嵌合で形成される空隙Gを
覆うように配置させると、軟磁性シートが空隙Gからの
磁束の外部への漏れを抑制するためにさらなる通過磁束
量の増加が生じる。軟磁性シートがフェライト焼結体と
同質材であれば50%、比透磁率が5,000の材料で
あれば2倍の通過磁束量が得られる。そのため、軟磁性
シートを用いた本発明のコイル用磁心1は、図8に示す
軟磁性シートを用いない場合の本発明のコイル用磁心1
()の磁気特性から、空隙Gのない理想的磁心()
の磁気特性に近づくことができる。したがって、軟磁性
シートを利用すると、さらに磁気特性の向上および小型
化が可能となる。In the embodiment described above, the coil magnetic core 1 is formed by combining the convex first magnetic core member 10 having the columnar core portion 11 and the concave second magnetic core member 20 having the through hole A in the central portion. I explained. However, a sheet made of a soft magnetic material having a thickness larger than the through hole A and having a thickness of 10 μm is attached to the upper surface of the second plate-shaped portion 21 of the second magnetic core member 20 (attached with an adhesive layer having a thickness of 10 μm). ) Is arranged so as to cover the gap G formed by fitting the tip of the columnar core 11 and the through hole A, the soft magnetic sheet further suppresses leakage of magnetic flux from the gap G to the outside. An increase in the amount of passing magnetic flux occurs. If the soft magnetic sheet is the same material as the ferrite sintered body, 50% is obtained, and if the soft magnetic sheet has a relative magnetic permeability of 5,000, twice the amount of passing magnetic flux is obtained. Therefore, the coil magnetic core 1 of the present invention using the soft magnetic sheet is the coil magnetic core 1 of the present invention when the soft magnetic sheet shown in FIG. 8 is not used.
From the magnetic characteristics of (), the ideal magnetic core without air gap G ()
The magnetic characteristics of can be approached. Therefore, by using the soft magnetic sheet, it is possible to further improve the magnetic characteristics and reduce the size.
【0028】[0028]
【発明の効果】以上説明したように、本発明によれば、
同じ外形寸法であれば、コイル用磁心中心付近の通過磁
束量を約3倍にまで高めることができる。また、コイル
用磁心の性能を同程度に設定すると、磁心体積を約半分
にすることができる。これは材料コストを半分にするこ
とができるだけでなく、このコイル用磁心を用いたイン
ダクタンス素子を基板に実装したときの高さや面積を低
減することができるため、部品の実装密度を向上させる
ことも可能になる。さらに、コイル用磁心を構成する磁
心部材の組み合わせの工夫により、磁心及び電気・電子
デバイス製造の観点では、欠けなどによる破壊が減少
し、歩留まりの向上が期待できる。As described above, according to the present invention,
With the same outer dimensions, the amount of passing magnetic flux in the vicinity of the center of the coil core can be increased up to about three times. Further, if the performance of the coil core is set to the same level, the volume of the core can be halved. This not only cuts the material cost in half, but can also reduce the height and area when the inductance element using this coil core is mounted on the board, which can also improve the mounting density of parts. It will be possible. Further, by devising a combination of magnetic core members constituting the coil magnetic core, from the viewpoint of manufacturing the magnetic core and electric / electronic devices, damage due to chipping or the like is reduced, and improvement in yield can be expected.
【図1】 本発明にかかる第1の実施の形態のコイル用
磁心およびインダクタンス素子を示す図で、(a)は正
面断面図、(b)は組み立て斜視図である。FIG. 1 is a diagram showing a coil magnetic core and an inductance element according to a first embodiment of the present invention, in which (a) is a front sectional view and (b) is an assembled perspective view.
【図2】 本発明にかかる第1の実施の形態のインダク
タンス素子の組み立て手順を示す正面断面図である。FIG. 2 is a front sectional view showing an assembling procedure of the inductance element according to the first embodiment of the invention.
【図3】 本発明にかかる第2の実施の形態のコイル用
磁心およびインダクタンス素子を示す正面断面図であ
る。FIG. 3 is a front sectional view showing a coil magnetic core and an inductance element according to a second embodiment of the present invention.
【図4】 本発明にかかる第2の実施の形態のインダク
タンス素子の組み立て手順を示す正面断面図である。FIG. 4 is a front sectional view showing an assembling procedure of the inductance element according to the second embodiment of the invention.
【図5】 ドラム型磁心でのつばの幅を変える場合の磁
心の形状を示す図である。FIG. 5 is a diagram showing the shape of a magnetic core when the width of the collar is changed in the drum type magnetic core.
【図6】 ドラム型磁心でのつばの幅と磁束密度との関
係を示す図である。FIG. 6 is a diagram showing a relationship between a width of a collar and a magnetic flux density in a drum type magnetic core.
【図7】 ドラム型磁心でのつばの幅に対する巻き線の
幅を変えた場合の磁束密度の関係を示す図である。FIG. 7 is a diagram showing the relationship between the width of the winding and the magnetic flux density when the width of the winding is changed in the drum type magnetic core.
【図8】 複数の磁心部材から構成されるコイル用磁心
での補間を行った場合の磁束密度を示す図である。FIG. 8 is a diagram showing a magnetic flux density when interpolation is performed in a coil magnetic core including a plurality of magnetic core members.
【図9】 本発明のコイル用磁心での空隙幅と磁束量と
の関係を示す図である。FIG. 9 is a diagram showing the relationship between the gap width and the amount of magnetic flux in the coil magnetic core of the present invention.
【図10】 本発明のコイル用磁心での磁心高さと磁束
量との関係を示す図である。FIG. 10 is a diagram showing the relationship between the magnetic core height and the amount of magnetic flux in the coil magnetic core of the present invention.
【図11】 従来のE−E型磁心を示す図で、(a)は
斜視図、(b)は正面図である。FIG. 11 is a diagram showing a conventional EE type magnetic core, in which (a) is a perspective view and (b) is a front view.
【図12】 従来のE−I型磁心を示す斜視図である。FIG. 12 is a perspective view showing a conventional EI type magnetic core.
【図13】 従来のドラム型磁心を示す図であり、
(a)は斜視図、(b)はこの磁心を用いたインダクタ
ンス素子の正面断面図である。FIG. 13 is a view showing a conventional drum type magnetic core,
(A) is a perspective view, (b) is a front sectional view of an inductance element using this magnetic core.
【図14】 従来のポット型磁心を示す図で、(a)は
斜視図、(b)はこの磁心を用いたインダクタンス素子
の正面断面図である。14A and 14B are views showing a conventional pot type magnetic core, in which FIG. 14A is a perspective view and FIG. 14B is a front sectional view of an inductance element using this magnetic core.
【図15】 従来の上下磁心部材を両面テープで固定し
たコイル用磁心を用いたインダクタンス素子の正面断面
図である。FIG. 15 is a front sectional view of an inductance element using a coil magnetic core in which a conventional upper and lower magnetic core members are fixed with a double-sided tape.
【図16】 本発明にかかる第1の実施の形態のコイル
用磁心およびインダクタンス素子の他の例を示す組み立
て斜視図である。FIG. 16 is an assembled perspective view showing another example of the coil magnetic core and the inductance element according to the first embodiment of the present invention.
1…コイル用磁心、10…第1の磁心部材、11…柱状
芯部、12…第1の板状部、20…第2の磁心部材、2
1…第2の板状部、22…外筒部、30…巻き線、40
…磁性部材、A…貫通孔、G…空隙DESCRIPTION OF SYMBOLS 1 ... Magnetic core for coil, 10 ... 1st magnetic core member, 11 ... Columnar core part, 12 ... 1st plate-shaped part, 20 ... 2nd magnetic core member, 2
1 ... 2nd plate-shaped part, 22 ... Outer cylinder part, 30 ... Winding wire, 40
... magnetic member, A ... through hole, G ... void
───────────────────────────────────────────────────── フロントページの続き (72)発明者 田上 裕之 神奈川県横浜市旭区若葉台4−21−806 Fターム(参考) 5E070 AA01 AB01 BA20 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Hiroyuki Tagami 4-21-806 Wakabadai, Asahi Ward, Yokohama City, Kanagawa Prefecture F-term (reference) 5E070 AA01 AB01 BA20
Claims (8)
部に立設する柱状芯部とを有する第1の磁心部材と、 前記柱状芯部が嵌装される貫通孔をその中央部に有する
第2の板状部と前記第2の板状部の周囲から垂下する外
筒部とを有する第2の磁心部材とを備えたことを特徴と
するコイル用磁心。1. A first magnetic core member having a first plate-shaped portion and a columnar core portion standing upright in a central portion of the first plate-shaped portion, and a through hole into which the columnar core portion is fitted. A magnetic core for a coil, comprising: a second magnetic core member having a second plate-shaped portion having a central portion thereof and an outer tubular portion hanging from the periphery of the second plate-shaped portion.
される空隙を覆う磁性部材を備えたことを特徴とする請
求項1に記載のコイル用磁心。2. The magnetic core for a coil according to claim 1, further comprising a magnetic member that covers a space formed between the columnar core portion and the through hole.
徴とする請求項2に記載のコイル用磁心。3. The coil magnetic core according to claim 2, wherein the gap is 50 μm or less.
から構成されることを特徴とする請求項2に記載のコイ
ル用磁心。4. The coil core according to claim 2, wherein the magnetic member is formed of a sheet containing a soft magnetic material.
材がフェライト焼結体から構成されることを特徴とする
請求項1に記載のコイル用磁心。5. The coil magnetic core according to claim 1, wherein the first magnetic core member and the second magnetic core member are made of a ferrite sintered body.
から構成され、前記第2の磁心部材が軟磁性材料から構
成されることを特徴とする請求項1に記載のコイル用磁
心。6. The coil magnetic core according to claim 1, wherein the first magnetic core member is made of a ferrite sintered body, and the second magnetic core member is made of a soft magnetic material.
部に立設する柱状芯部とを有する第1の磁心部材と、前
記柱状芯部が嵌装される貫通孔をその中央部に有する第
2の板状部と前記第2の板状部の周囲から垂下する外筒
部とを有する第2の磁心部材とを備えたコイル用磁心
と、 前記柱状芯部の外周に巻装された巻き線と、を備えたこ
とを特徴とするインダクタンス素子。7. A first magnetic core member having a first plate-shaped portion and a columnar core portion standing upright in a central portion of the first plate-shaped portion, and a through hole into which the columnar core portion is fitted. A coil magnetic core including a second magnetic core member having a second plate-shaped portion having a central portion thereof and an outer tubular portion hanging from the periphery of the second plate-shaped portion; An inductance element, comprising: a winding wound around an outer circumference.
部との間に形成される空間に配設されることを特徴とす
る請求項7に記載のインダクタンス素子。8. The inductance element according to claim 7, wherein the winding wire is arranged in a space formed between the columnar core portion and the outer cylinder portion.
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JP2002048525A JP2003249409A (en) | 2002-02-25 | 2002-02-25 | Magnetic core for coil and inductance element |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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JP2002048525A JP2003249409A (en) | 2002-02-25 | 2002-02-25 | Magnetic core for coil and inductance element |
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JP2003249409A true JP2003249409A (en) | 2003-09-05 |
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ID=28661301
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007201318A (en) * | 2006-01-30 | 2007-08-09 | Matsushita Electric Ind Co Ltd | Magnetic sheet and manufacturing method therefor |
JP2010141191A (en) * | 2008-12-12 | 2010-06-24 | Nec Tokin Corp | Inductor and method of manufacturing the same |
-
2002
- 2002-02-25 JP JP2002048525A patent/JP2003249409A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007201318A (en) * | 2006-01-30 | 2007-08-09 | Matsushita Electric Ind Co Ltd | Magnetic sheet and manufacturing method therefor |
JP2010141191A (en) * | 2008-12-12 | 2010-06-24 | Nec Tokin Corp | Inductor and method of manufacturing the same |
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