JPH11317309A - Face mounting component using pot type core - Google Patents
Face mounting component using pot type coreInfo
- Publication number
- JPH11317309A JPH11317309A JP4317299A JP4317299A JPH11317309A JP H11317309 A JPH11317309 A JP H11317309A JP 4317299 A JP4317299 A JP 4317299A JP 4317299 A JP4317299 A JP 4317299A JP H11317309 A JPH11317309 A JP H11317309A
- Authority
- JP
- Japan
- Prior art keywords
- coil
- gap
- outside
- core
- length
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Coils Of Transformers For General Uses (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はパソコンを主にノー
トブックタイプ、ワープロ、ゲーム機などの卓上電子機
器の電源入力回路などの主としてコモンモードノイズ対
策に使用するコイル部品及びそのための複合コイルに関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil component mainly used for countermeasures against common mode noise, such as a power supply input circuit of a desktop electronic device such as a notebook type, a word processor, a game machine, etc., and a composite coil therefor.
【０００２】[0002]
【従来の技術】本発明者は特開平１０−２２１４０号
（米国特許出願第０８／８８８９４０号）において、つ
ぼ型コアに巻線を施したボビンをはめ込み貫通孔又は貫
通した溝部からコイル端末を引き出し更につぼ型コアを
はめ込む構造（実開平５−６６９２２号）や、つぼ型コ
ア外側脚部開口面に溝を設けその部分から端末を引き出
し更に平板状コアを接合する構造（実開昭５９−４６０
２１号）などの端末が部品自体から突出するリード付き
部品を、面実装することを可能とした。すなわち、図１
９に示したように、端壁３に貫通孔４を有し中央に内部
脚部１と外側に外側脚部２とを有するつぼ型コア５と、
前記つぼ型コア５に嵌合された成形されたコイル６と、
前記つぼ型コア５の開放端に接合された蓋コア１１とよ
りなるコイル部品において、前記貫通孔４には前記コイ
ルの端子８ａ、８ｂが前記端面から外部に突出しないよ
うに配置し、前記端壁外面には、前記端子８ａ、８ｂと
接続する膜状外部電極を形成したコイル部品により面実
装を可能とした。2. Description of the Related Art The inventor of the present invention disclosed in Japanese Patent Application Laid-Open No. 10-22140 (U.S. Pat. No. 08 / 888,940) a bobbin on which a winding was wound around a pot-shaped core, and a coil terminal was pulled out from a through hole or a groove penetrated. Further, a structure in which a pot-shaped core is fitted (Japanese Utility Model Laid-Open No. 5-66922), a structure in which a groove is provided in the opening surface of the outer leg portion of the pot-shaped core, a terminal is drawn out, and a flat core is joined together (Japanese Utility Model Application Laid-open No.
No. 21) can be surface-mounted on a leaded component that protrudes from the component itself. That is, FIG.
9, a pot-shaped core 5 having a through hole 4 in the end wall 3 and having an inner leg 1 in the center and an outer leg 2 on the outside,
A molded coil 6 fitted to the pot type core 5,
In the coil component comprising the lid core 11 joined to the open end of the crucible core 5, the terminals 8a and 8b of the coil are disposed in the through hole 4 so as not to protrude from the end face to the outside. On the outer surface of the wall, surface mounting was enabled by a coil component having a film-like external electrode connected to the terminals 8a and 8b.
【０００３】[0003]
【発明が解決しようとする課題】上記のような従来技術
は大電流を必要とする電源回路などのリード付き面実装
化を可能にし、実装工程の簡素化、装置コストの削減、
電子機器の小型化などの点で優れてはいるが、なお次の
ような問題点があった。The prior art as described above makes it possible to mount a leaded surface of a power supply circuit or the like which requires a large current, thereby simplifying the mounting process, reducing the device cost, and the like.
Although it is excellent in miniaturization of electronic equipment, it still has the following problems.
【０００４】すなわち、特開平１０−２２１４０号に記
載されたコイル部品では、２つのコイル６ａ、６ｂが図
１７のようにつぼ型コア内側脚部１に対して重ね巻きさ
れているために、第１に内コイルと外コイルとの長さが
違い、導体のインダクタンス成分は外コイルが大きく、
内コイルは小さいという差が発生する。第２に、主な磁
束の通路になる内側脚部までの距離が内コイルと外コイ
ルとでは違うため、外コイルの磁気抵抗は大きく内コイ
ルでは小さいという差が生じる。導体のインダクタンス
成分と磁気抵抗とでは磁気抵抗の影響が大きいため、総
合すると導体のインダクタンス成分が大きいが磁気抵抗
が高い外コイルは、内コイルに比べて自己インダクタン
スが小さくなる。また内コイルはその逆となり、外コイ
ルに比べ自己インダクタンスが大きくなる。これにより
内コイルはインピーダンス特性が高く、外コイルはそれ
より低くなる。これらの特性のずれは電子機器の雑音端
子電圧の差として現れる。すなわち、部品に方向性が存
在することになる。方向性のある部品は、製品製造上、
使用上の管理を必要とし、また搭載基板の回路設計にも
配慮しなければならない。That is, in the coil component described in Japanese Patent Application Laid-Open No. Hei 10-22140, the two coils 6a and 6b are wound around the crucible core inner leg 1 as shown in FIG. 1, the length of the inner coil and the outer coil is different, and the inductance component of the conductor is larger in the outer coil.
There is a difference that the inner coil is small. Second, since the distance to the inner leg, which is the main magnetic flux path, differs between the inner coil and the outer coil, a difference occurs in that the magnetic resistance of the outer coil is large and small in the inner coil. Since the effect of the magnetic resistance is large between the inductance component of the conductor and the magnetic resistance, the external coil having a large inductance component of the conductor but a high magnetic resistance as a whole has a smaller self-inductance than the internal coil. Also, the inner coil is reversed, and the self-inductance is larger than that of the outer coil. As a result, the impedance characteristic of the inner coil is high, and that of the outer coil is lower. The deviation of these characteristics appears as a difference in the noise terminal voltage of the electronic device. That is, the component has directionality. Directional parts are used in product manufacturing.
It requires management in use and also requires consideration of the circuit design of the mounting board.
【０００５】[0005]
【課題を解決するための手段】上記の課題を解決するた
めに、本発明では、導体自身のインダクタンス成分を内
コイルは減少させるように、また外コイルは増加させる
ように長さを調整する。さらに、つぼ型コアの内側脚部
と内コイルの間に隙間を設け磁束の漏れを生じさせると
いう手段を採用し、内コイルの磁気抵抗を増加させ内コ
イルの自己インダクタンスを減少させる。すなわち、本
発明は、内コイルは極力短い導体長さで成形し、導体の
インダクタンスを減少させて抑え、且つ好ましくはつぼ
型コアの内側脚部との間に隙間を設けて磁束の漏れを生
じさせることにより内コイルの自己インダクタンスを抑
える。一方、外コイルは極力長い導体長さにて成形し外
コイルのインダクタンス値を増加させるために内コイル
との間に隙間を設けるという手段を採用する。In order to solve the above-mentioned problems, in the present invention, the length is adjusted so that the inductance component of the conductor itself is reduced by the inner coil and is increased by the outer coil. Further, a means is provided in which a gap is provided between the inner leg portion of the pot-shaped core and the inner coil to cause leakage of magnetic flux, thereby increasing the magnetic resistance of the inner coil and decreasing the self-inductance of the inner coil. That is, according to the present invention, the inner coil is formed with a conductor length as short as possible, the inductance of the conductor is reduced and suppressed, and a gap is preferably provided between the inner leg of the crucible core and leakage of magnetic flux occurs. By doing so, the self-inductance of the inner coil is suppressed. On the other hand, the outer coil employs a means of being formed with a conductor length as long as possible and providing a gap between the outer coil and the inner coil in order to increase the inductance value of the outer coil.
【０００６】すなわち、本発明のコイルは、内コイル
と、前記内コイルの外側に配置された外コイルとよりな
る自立構造の複合コイルであり、前記内コイルと外コイ
ルの間には隙間を設け且つ内コイルよりも外コイルの方
の長さを大きくしたことを特徴とする。これにより、内
コイルの導体長さは外コイルに比べ短くなり導体の持つ
インダクタンスが小さくなり、一方外コイルは隙間の分
だけ長くなるのでインダクタンスが大きくなり、両者の
アンバランスを補正することができる。さらに好ましく
は内コイルとそれを収容するつぼ型コアの内側脚部との
間にも隙間を設けるとさらに内コイルのインダクタンス
を低下することができ、内外コイルのインダクタンスを
同等化することが一層容易になる。本発明のコイル部品
は、内側脚部を有し端壁に貫通孔を有するつぼ型コア
と、前記つぼ型コアに嵌合された形状保持性のコイル
と、前記つぼ型コアの開放端に接合された蓋コアとより
なり、前記貫通孔には前記コイルの端子が前記端面から
外部に突出しないように配置し、前記端壁外面には、前
記端子と接続する膜状外部電極を形成したコイル部品に
おいて、前記コイルは前記内側脚部の周りに巻かれる内
コイルと、その外側に巻かれる外コイルとよりなり、前
記内コイルと外コイルの間には隙間を設け且つ外コイル
の長さをそれを内コイルに直接巻いた場合よりも大きく
したことを特徴とする。これにより内外コイルのインダ
クタンスを接近させることが容易になる。好ましくは、
前記内外コイルのインダクタンスが１０％以内の差とな
るように前記内外コイルの長さ及び隙間が定められる。
さらに好ましくは、前記内外コイルの長さ及び隙間は前
記内外コイルのインダクタンスがほぼ等しくなるように
定められる。また前記隙間は好ましくは内外コイルの直
径以上とする。また、好ましくは前記内側脚部と内コイ
ルの間に隙間を設ける。これにより内外コイルのインダ
クタンスを接近させることができる。本発明はまた、内
コイルと、前記内コイルの外側に配置された外コイルと
よりなる形状保持性の複合コイルにおいて、前記内コイ
ルと外コイルの間には隙間を設け且つ前記外コイルの長
さを前記内コイルに直接巻いた場合よりも大きくしたこ
とを特徴とする複合コイルを提供する。前記内外コイル
のインダクタンスが１０％以内の差を有し、好ましくは
同一となるように前記内外コイルの長さ及び隙間が定め
られていることが好ましい。本発明のコイル及びコイル
部品は特にコモンモードノイズに対して効果的である。
すなわち、本発明のコイル及びコイル部品はコモンモー
ドノイズ（同相信号）に対してインピーダンスが大きく
なり輻射ノイズ（３０ＭＨ〜１ＧＨｚ）に対して抑止効
果が得られる。また、雑音端子電圧（１５０ｋＨｚ〜３
０ＭＨｚ）に対して各ラインのインピーダンスに応じた
ノイズの抑制効果が得られる。各ラインのインダクタン
ス値（インピーダンス値）に大きな差がある場合、片側
のラインからのノイズが大きく輻射されるので、これを
解消するために従来は回路基板上でＬＣフィルターなど
の回路を付加し、ノイズ抑止対策をさらに取らなければ
ならなかったが、本発明のように内外コイルのインダク
タンスの差を１０％以内にすることによりノイズの輻射
を抑制し、フィルタの付加のようなさらなる対策は不要
とした。That is, the coil of the present invention is a composite coil having a self-standing structure comprising an inner coil and an outer coil disposed outside the inner coil, and a gap is provided between the inner coil and the outer coil. In addition, the length of the outer coil is longer than that of the inner coil. As a result, the conductor length of the inner coil is shorter than that of the outer coil, and the inductance of the conductor is smaller. On the other hand, the outer coil is longer by the amount of the gap, so that the inductance is larger, and the imbalance between the two can be corrected. . More preferably, if a gap is provided between the inner coil and the inner leg of the crucible core that accommodates the inner coil, the inductance of the inner coil can be further reduced, and it is easier to equalize the inductance of the inner and outer coils. become. A coil component according to the present invention includes a pot-shaped core having an inner leg portion and a through hole in an end wall, a shape-retaining coil fitted to the pot-shaped core, and a joint with an open end of the pot-shaped core. A coil in which a terminal of the coil is disposed in the through hole so as not to protrude from the end face to the outside, and a film-like external electrode connected to the terminal is formed on an outer surface of the end wall. In the component, the coil includes an inner coil wound around the inner leg, and an outer coil wound outside the inner leg, a gap is provided between the inner coil and the outer coil, and the length of the outer coil is reduced. It is characterized in that it is made larger than when it is wound directly on the inner coil. This makes it easier to make the inductances of the inner and outer coils closer. Preferably,
The length and the gap of the inner and outer coils are determined so that the inductance of the inner and outer coils becomes a difference of 10% or less.
More preferably, the length and gap of the inner and outer coils are determined so that the inductance of the inner and outer coils is substantially equal. The gap is preferably equal to or larger than the diameter of the inner and outer coils. Preferably, a gap is provided between the inner leg and the inner coil. Thereby, the inductances of the inner and outer coils can be made closer. The present invention also provides a shape-retaining composite coil comprising an inner coil and an outer coil disposed outside the inner coil, wherein a gap is provided between the inner coil and the outer coil, and a length of the outer coil is increased. The present invention provides a composite coil characterized in that the length of the composite coil is larger than that when the inner coil is directly wound. It is preferable that the lengths and gaps of the inner and outer coils are determined so that the inductance of the inner and outer coils has a difference of 10% or less, and is preferably the same. The coil and coil component of the present invention are particularly effective against common mode noise.
That is, the coil and the coil component according to the present invention have an increased impedance with respect to common mode noise (in-phase signal), and have an effect of suppressing radiation noise (30 MHz to 1 GHz). In addition, the noise terminal voltage (150 kHz to 3
0 MHz), an effect of suppressing noise corresponding to the impedance of each line can be obtained. If there is a large difference in the inductance value (impedance value) of each line, noise from one line is radiated greatly. To solve this, conventionally, a circuit such as an LC filter is added on the circuit board, Although noise suppression measures had to be taken further, noise radiation was suppressed by keeping the difference in inductance between the inner and outer coils within 10% as in the present invention, and no further measures such as adding a filter were required. did.
【０００７】[0007]
【発明の実施の形態】以下、本発明の実施の形態につい
て説明する。本発明では、内コイルは極力短い導体長さ
で成形し、導体のインダクタンス成分を極力抑え、さら
に好ましくはつぼ型コアの内側脚部との間に隙間を設け
て磁束の漏れを生じさせることにより内コイルの自己イ
ンダクタンスを抑えることを可能にする。一方、外コイ
ルは内コイルとの間に隙間を設けることにより極力長い
導体長さにて成形し、導体の持つインダクタンス値を増
加させることにより、外コイルの自己インダクタンスを
増加させることができる。これにより内コイルと外コイ
ルの自己インダクタンスの差をなくすることができる。Embodiments of the present invention will be described below. According to the present invention, the inner coil is formed with a conductor length as short as possible, the inductance component of the conductor is suppressed as much as possible, and more preferably, a gap is provided between the inner leg of the crucible core and leakage of magnetic flux is caused. The self-inductance of the inner coil can be suppressed. On the other hand, the outer coil can be formed with a conductor length as long as possible by providing a gap between the outer coil and the inner coil, and the self-inductance of the outer coil can be increased by increasing the inductance value of the conductor. Thereby, the difference in the self-inductance between the inner coil and the outer coil can be eliminated.
【０００８】[0008]
【実施例】図１は本発明に係わるつぼ型コアを用いたコ
イル部品の分解斜視図であり、図２、図３はそれぞれつ
ぼ型コア５の平面図と正面図である。なお従来のコイル
部品の部分に対応する部分には同一の参照符号を付し
た。図１に示したように、本発明のコイル部品は、軟磁
性つぼ型コア５と、その内部に収容される成形されたコ
イル６と、つぼ型コア５を閉じる軟磁性平板状蓋コア１
１とからなる。なお、蓋コアは平板状でなくても良くつ
ぼ型コアを使用しても良い。図１９の場合とは異なり、
本発明のコイル６は後述のようにほぼ同一径の内コイル
と外コイルの複合コイルであり、それらの間には隙間１
０ａが形成され、さらに好ましくは中央の内側脚部１と
の間に隙間を有する。1 is an exploded perspective view of a coil component using a crucible core according to the present invention. FIGS. 2 and 3 are a plan view and a front view of a crucible core 5, respectively. Parts corresponding to those of the conventional coil parts are denoted by the same reference numerals. As shown in FIG. 1, the coil component of the present invention includes a soft magnetic pot type core 5, a molded coil 6 housed therein, and a soft magnetic flat cover core 1 for closing the pot type core 5.
It consists of 1. The lid core does not have to be flat, and a pot-shaped core may be used. Unlike the case of FIG.
The coil 6 of the present invention is a composite coil of an inner coil and an outer coil having substantially the same diameter as described later, and a gap 1 is provided between them.
0a is formed, and more preferably, has a gap with the central inner leg 1.
【０００９】図１〜図３に示したように、つぼ型コア５
はほぼ閉鎖した端壁３と、その中央に設けた円柱状の内
側脚部１と、コイルを収容する環状空所を形成する外側
脚部２とよりなる。コア５には成形時、あるいは焼結後
に適当な目印（図示せず）を付す等により方向性を有
し、また端壁３の４隅に設けた４個の円形の貫通孔４を
コイル６の端子８の位置に相当する位置に有する。貫通
孔４の孔径はコイル６の端子の直径よりも充分大きく定
める。これは、寸法合わせの許容度を上げるためと、ハ
ンダ注入によりコイルと外部電極膜との接続抵抗を低下
させるためである。更に、つぼ型コア５の上端面には平
板状蓋コア１１と合わせた時に隙間を形成できる凹部１
２が少なくとも１か所（図では２か所）に形成されてい
る。この隙間はコアの内部が気密化されることを回避す
るためでありその作用は後に述べる。As shown in FIG. 1 to FIG.
Comprises a substantially closed end wall 3, a cylindrical inner leg 1 provided at the center thereof, and an outer leg 2 forming an annular space for accommodating the coil. The core 5 has directionality by forming appropriate marks (not shown) at the time of molding or after sintering, and has four circular through holes 4 provided at four corners of the end wall 3. At the position corresponding to the position of the terminal 8. The diameter of the through hole 4 is set to be sufficiently larger than the diameter of the terminal of the coil 6. This is because the tolerance of dimension matching is increased, and the connection resistance between the coil and the external electrode film is reduced by solder injection. Further, a concave portion 1 that can form a gap when combined with the flat lid core 11 is formed on the upper end surface of the pot-shaped core 5.
2 are formed in at least one place (two places in the figure). This gap is for preventing the inside of the core from being airtight, and its operation will be described later.
【００１０】コイル６の構造は図４〜図７に示される。
図４はコイル６の平面図、図５はつぼ型コア５に組み込
んだコイル６を示す平面図（蓋コアは外して示した）、
図６はコイル６の右側面図、及び図７はコイル６の正面
図である。コイル６は巻軸に対し内側にコイル６ａが外
側にコイル６ｂが位置するいわゆるレイヤー巻線構造を
有する。レイヤー巻線構造はコイルの高さを制限し、バ
イファイラ巻線（図１６参照）に比してつぼ型コア５を
平面型に近付け、小型化することができる（図１７参
照）。コイル６の内コイル６ａは極力短い導体長さにて
成形し、導体のインダクタンス成分を極力抑え、且つ、
好ましくはつぼ型コアの内側脚部１との間に隙間１０ｂ
を設けて磁束の漏れを生じさせることにより内コイルの
自己インダクタンスを抑えることが可能になる。一方、
図４の内コイル６ａと外コイル６ｂの間に内外コイルの
直径以上の寸法の隙間１０ａを形成することにより、外
コイル６ｂの長さは隙間を形成した分だけ大きくなるの
で、外コイル６ｂを極力長い導体長さにて成形でき、導
体の持つインダクタンス値を増加させることにより、外
コイルの自己インダクタンスを増加させることができ
る。好ましくは内外コイル６ａ、６ｂのインダクタンス
の差は約１０％以内、理想的にはこの差はほぼゼロであ
る。これにより複合コイルの接続の向きを問題にする必
要もなくなる。コイル６は太い線材の形状保持性を利用
した形状保持性（自立構造）を持つ被覆金属線例えば銅
線であり、つぼ型コア５の貫通孔４の間隔とほぼ同様の
端子間距離を有しそれぞれの貫通孔４内に収まる一方の
巻線の端子８ａ、８ａと他方の巻線の端子８ｂ、８ｂを
有し、さらに、内側コイル６ａの巻径は内側脚部１の外
径より若干大きい。図から分かるように、コイル６は明
らかに非対称構造のため方向性を有する。コイルが形状
保持性を有するために必要な直径は、銅線の場合には約
０．１ｍｍ以上、例えば０．６ｍｍである。この場合内
外コイルは同一直径を有するものを使用することが作業
性の上から望ましい。ワイヤからこのような太さにする
と電気抵抗が低下して電流による発熱が減じる。銀線の
ようなより軟質の金属では直径は銅線のそれよりも太く
する必要がある。端子８の長さは、コイル６の方向をつ
ぼ型コア５の方向に合わせて、コイル６を内側脚部１の
上部にはめ込んでつぼ型コア５の内部に収容した時に、
端子８が貫通孔４に挿入されるが、端壁を貫通するに至
らない程度の長さに定める。また、端子の位置は貫通孔
４に遊嵌するように貫通孔の軸間隔を、端子の間隔とほ
ぼ同一とする。また、形状保持性のコイルを使用すると
コイル部品の小型化が可能であるが、さしつかえない場
合にはボビンを用いて形状保持性を高めても良い。この
代わりに、コイルの形状保持性は、その線材の被覆の外
面に接着材を施すことにより線間接着して、高めること
もできる。例えば図４に相当する図２７において端子８
ａとコイル６ｂが接触する箇所（斜線部）に接着剤を施
すことにより内外コイルの形状を保持しまた隙間１０ａ
を保持することができる。The structure of the coil 6 is shown in FIGS.
FIG. 4 is a plan view of the coil 6, FIG. 5 is a plan view showing the coil 6 incorporated in the crucible core 5 (the cover core is shown removed),
FIG. 6 is a right side view of the coil 6, and FIG. 7 is a front view of the coil 6. The coil 6 has a so-called layer winding structure in which the coil 6a is located inside and the coil 6b is located outside the winding axis. The layer winding structure restricts the height of the coil, and makes the pot-shaped core 5 closer to a flat type as compared with the bifilar winding (see FIG. 16), so that the size can be reduced (see FIG. 17). The inner coil 6a of the coil 6 is formed with a conductor length as short as possible, and the inductance component of the conductor is suppressed as much as possible.
Preferably a gap 10b between the inner leg 1 of the crucible core
Is provided to cause the leakage of the magnetic flux, whereby the self-inductance of the inner coil can be suppressed. on the other hand,
By forming a gap 10a between the inner coil 6a and the outer coil 6b in FIG. 4 having a dimension equal to or larger than the diameter of the inner and outer coils, the length of the outer coil 6b is increased by the length of the gap. It can be formed with a conductor length as long as possible, and the self-inductance of the outer coil can be increased by increasing the inductance value of the conductor. Preferably, the difference between the inductances of the inner and outer coils 6a, 6b is within about 10%, and ideally this difference is almost zero. This eliminates the need to consider the connection direction of the composite coil. The coil 6 is a coated metal wire having a shape retention (self-standing structure) utilizing the shape retention of a thick wire, such as a copper wire, and has a terminal-to-terminal distance substantially equal to the distance between the through holes 4 of the pot type core 5. It has terminals 8a, 8a of one winding and terminals 8b, 8b of the other winding that fit in each through hole 4, and the winding diameter of the inner coil 6a is slightly larger than the outer diameter of the inner leg 1. . As can be seen, the coil 6 is directional due to the apparently asymmetric structure. The diameter required for the coil to have shape retention is about 0.1 mm or more, for example, 0.6 mm in the case of a copper wire. In this case, it is desirable from the viewpoint of workability that the inner and outer coils have the same diameter. When the wire is formed to have such a thickness, electric resistance is reduced, and heat generation due to current is reduced. For softer metals such as silver wire, the diameter must be larger than that of copper wire. The length of the terminal 8 is set such that the direction of the coil 6 is aligned with the direction of the pot-shaped core 5, and the coil 6 is fitted into the upper part of the inner leg portion 1 and housed inside the pot-shaped core 5.
Although the terminal 8 is inserted into the through hole 4, the length is determined so as not to penetrate the end wall. In addition, the axial distance between the through holes is substantially the same as the terminal distance so that the terminals are loosely fitted in the through holes 4. In addition, if a coil having shape retention is used, the size of the coil component can be reduced. However, if the coil component cannot be used, the shape retention may be enhanced by using a bobbin. Alternatively, the shape retention of the coil can be enhanced by applying an adhesive to the outer surface of the coating of the wire, thereby bonding the wires together. For example, in FIG. 27 corresponding to FIG.
The shape of the inner and outer coils is maintained by applying an adhesive to a portion (hatched portion) where the a and the coil 6b are in contact with each other.
Can be held.
【００１１】次に図２０ないし図２６を参照して内外コ
イルの間に隙間を形成する方法を具体的に説明する。ま
ず図２６に示すように、４隅に凹部２５を有するブロッ
ク２４の上平面２２に巻軸（スピンドル）２１を一体に
形成する。また凹部２５の内、２つの凹部２５にはに抑
え爪２３が配置されている（図２０）。ブロック２４及
び巻軸２１は図示しない動力源から回転駆動される。こ
れとは別に内外コイルの間に所定の隙間を形成できる内
径を有する隙間形成筒２０を用意する。隙間形成性筒２
０は端子８ａ、８ｂを通過させるスロット２６を形成で
きるように２部材から構成する。図２０は巻き始めの状
態を示す。内コイルの端末８ａは爪２３により１つの凹
部２５に固定され、内コイル用巻き線は巻軸２１に沿う
ように配置される。ついで図２１のように巻軸２１を右
回転することにより内コイル６ａは所定回数巻軸に巻き
付けられる。図２２は内コイルの巻き線が完了し、外コ
イル６ｂを巻始める状態を示す。巻き付いた内コイル６
ａの外径にほぼ等しい内径を有する隙間形性筒２０を内
コイル６ａの周りに沿わせて内コイル６ａを覆う。次に
外コイル６ｂの端末８ｂは他の爪２３により他の凹部２
５に固定され、外コイル用巻き線は隙間形成円筒２０に
沿うように配置される。図２３のように巻軸２１を右回
転することにより外コイル６ｂは所定回数隙間形性筒２
０に巻き付けられる。図５は外コイル６ｂの巻き線が完
了した状態を示す。ついで内外コイル６ａ、６ｂの他方
の末端８ａ、８ｂを残りの凹部２５にそれぞれ曲げつけ
られる。末端は所定の長さにカットされる。内外コイル
の接触部は図２７のように接着剤により結合される。Next, a method for forming a gap between the inner and outer coils will be specifically described with reference to FIGS. First, as shown in FIG. 26, a winding shaft (spindle) 21 is integrally formed on an upper plane 22 of a block 24 having concave portions 25 at four corners. The holding claws 23 are arranged in two of the concave portions 25 (FIG. 20). The block 24 and the winding shaft 21 are driven to rotate by a power source (not shown). Separately, a gap forming cylinder 20 having an inner diameter capable of forming a predetermined gap between the inner and outer coils is prepared. Gap forming cylinder 2
Numeral 0 is composed of two members so that a slot 26 through which the terminals 8a and 8b pass can be formed. FIG. 20 shows a state at the start of winding. The terminal 8a of the inner coil is fixed to one concave portion 25 by the claw 23, and the winding for the inner coil is arranged along the winding shaft 21. Then, as shown in FIG. 21, by rotating the winding shaft 21 clockwise, the inner coil 6a is wound around the winding shaft a predetermined number of times. FIG. 22 shows a state where the winding of the inner coil is completed and the winding of the outer coil 6b is started. Wound inner coil 6
A gap type cylinder 20 having an inner diameter substantially equal to the outer diameter of a is provided along the inner coil 6a to cover the inner coil 6a. Next, the terminal 8b of the outer coil 6b is connected to another recess 2 by another claw 23.
5 and the outer coil winding is disposed along the gap forming cylinder 20. By rotating the winding shaft 21 clockwise as shown in FIG. 23, the outer coil 6b is
Wound around 0. FIG. 5 shows a state where the winding of the outer coil 6b is completed. Next, the other ends 8a and 8b of the inner and outer coils 6a and 6b are bent into the remaining recesses 25, respectively. The ends are cut to length. The contact portions of the inner and outer coils are joined by an adhesive as shown in FIG.
【００１２】図１、図８〜図９に示したように、貫通孔
４の外側には膜状の外部電極１４が公知の方法で形成さ
れる。更に好ましくは貫通孔４の内面にも外部電極１４
と一連に接続する膜状の電極１５を施こす。こうして、
後述する端子８と外部電極１４とのハンダ接続により大
きい電流に耐える低抵抗の電気接続が実現できる。As shown in FIGS. 1, 8 and 9, a film-like external electrode 14 is formed outside the through hole 4 by a known method. More preferably, the external electrode 14 is also provided on the inner surface of the through hole 4.
And a film-like electrode 15 connected in series. Thus,
A low-resistance electrical connection that can withstand a larger current can be realized in the solder connection between the terminal 8 and the external electrode 14 described later.
【００１３】図８〜図９はつぼ型コア５とコイル６の組
立の状態を示す。すなわち、図８のように、コイル６と
つぼ型コア５の方向を定めて内側コイル６ａをつぼ型コ
ア５の内側脚部１にはめ込むと、図９のようにコイル６
の端子８の末端は端壁３の内部にとどまる。つぼ型コア
のコイル挿入部の深さは、貫通孔に収まる端末部分を除
いたコイル高さより深い。次いで、次に記載する工程を
行う前に、又は後に平板状蓋コア１１で頂部を閉鎖し接
着するとコイル部品の組立てが完了する。FIGS. 8 and 9 show an assembled state of the pot type core 5 and the coil 6. FIG. That is, as shown in FIG. 8, when the directions of the coil 6 and the pot-shaped core 5 are determined and the inner coil 6a is fitted into the inner leg 1 of the pot-shaped core 5, as shown in FIG.
Of the terminal 8 remains inside the end wall 3. The depth of the coil insertion portion of the pot type core is deeper than the coil height excluding the terminal portion that fits in the through hole. Next, before or after performing the process described below, the top portion is closed and bonded with the flat lid core 11 to complete the assembly of the coil component.
【００１４】図１０〜図１２にコイル６の端子８と外部
電極１４の接続工法と状態を示す。コイル６を収納した
つぼ型コア５の端壁３を、溶融ハンダにある一定時間浸
漬することで図１０、図１１及び図１２の順に浸漬面よ
りハンダが貫通孔４内に上昇してくる。このために貫通
孔内壁に電極１５が形成されていることが好ましい。ハ
ンダは熱により端子８の絶縁被膜を破壊しながら、貫通
孔４と端子８の間の隙間を埋め外部電極１４と電気的に
接続するに至る。図１４は面実装に適した、底面状態に
するハンダ仕上げ方法を示す。噴流ハンダ１６の流れ落
ちる方向に対し、つぼ型コア５の浸漬軌道をほぼ逆方向
にすることで余分なハンダを切ることが可能になる。
又、同じ効果は図１５のようにつぼ型コアの移動方向を
制御することにより得ることができる。FIGS. 10 to 12 show a connection method and a state of the terminal 8 of the coil 6 and the external electrode 14. By immersing the end wall 3 of the pot type core 5 containing the coil 6 in the molten solder for a certain period of time, the solder rises into the through hole 4 from the immersion surface in the order of FIGS. 10, 11 and 12. For this reason, it is preferable that the electrode 15 is formed on the inner wall of the through hole. The solder fills the gap between the through-hole 4 and the terminal 8 and breaks the insulating coating of the terminal 8 by heat, and electrically connects to the external electrode 14. FIG. 14 shows a solder finishing method suitable for surface mounting, which brings a bottom surface state. By making the immersion trajectory of the crucible core 5 substantially opposite to the direction in which the jet solder 16 flows down, it is possible to cut off excess solder.
The same effect can be obtained by controlling the moving direction of the pot-shaped core as shown in FIG.
【００１５】図１３ではコイル６を収めたつぼ型コア５
と平板状蓋コア１１との接合状態を示す。同図で図１３
（ａ）はつぼ型コア５の側に、図１３（ｂ）は平板状蓋
コア１１の側に、図１３（ｃ）は両者に凹部１２を形成
した場合であり、どれも同等である。このように接合面
に磁気シールド効果を大きく損なわない程度の、適当な
複数の隙間を設けることにより、以下で述べる効果ｂ、
ｃ、ｄが得られる。FIG. 13 shows a crucible core 5 containing a coil 6.
2 shows a joint state between the plate-shaped lid core 11 and the base plate 11. In FIG.
13A shows a case where the concave portion 12 is formed on the side of the pot-shaped core 5, FIG. 13B shows a case where the concave portion 12 is formed on the side of the flat lid core 11, and FIG. By providing a suitable plurality of gaps in such a manner that the magnetic shielding effect is not significantly impaired on the joint surface, the effect b described below can be obtained.
c and d are obtained.
【００１６】上に述べた構造から得られる効果は次の通
りである。 ａ．貫通孔を線径より充分に大きくすることで、コイル
の端末距離規格公差が大きくできるので容易にコイル形
成できる。 ｂ．つぼ型コアと平板状蓋コアの接合面の隙間は空気の
出入り口で、接合の際コイル収納部の空気が密閉状態に
なり、空気が膨張し接合面を離そうとする力が働き、接
着強度が劣化するのを防ぐ。 ｃ．つぼ型コアと蓋コアの接合面の隙間は空気の出入り
口で、接合の際コイル収納部の空気が密閉状態になり、
空気が膨張し接合面から外部に出る、この時微細な外気
との出入り口ができここから外気の湿気が侵入するが、
微細な外気との出入り口のため、湿度が完全に外部にで
ない状態で結露などする恐れがあり、絶縁破壊につなが
るこの現象を防止する。 ｄ．つぼ型コアと蓋コアの接合面の隙間は空気の出入り
口で、基板に部品を実装する加熱の際コイル収納部の密
閉状態の空気が膨張し収縮するこの時、接合部のハンダ
を貫通孔を通してコイル収納部に引き込み、短絡が発生
する恐れがあり、絶縁破壊につながるこの現象を防止す
る。 ｅ．つぼ型コア外側脚部は貫通孔周辺部以外は厚くする
ことで、蓋コア接合の際の充分な面積の確保又、コアの
擬似断面積が増え磁気結合が向上する。 ｆ．つぼ型コアと蓋コアの接合面の隙間は、発熱したコ
イルの熱気を外部に逃がし製品の温度上昇を抑える効果
がある。 ｇ．巻軸に対し内側と外側に２個のコイルが位置するレ
イヤー巻線構造は、コモンモードで多く用いられるバイ
ファイラ巻線と比較し同一条件（巻数、巻径、ワイヤ
ー）において、コイルの仕上がり外径は大きくなるがコ
イル部の全長を最短で形成することができる。この部分
を垂直方向に位置させることで面実装部品としての高さ
制限、小型化、高信頼性、などの部品設計を容易にす
る。The effects obtained from the structure described above are as follows. a. By making the through hole sufficiently larger than the wire diameter, the terminal distance standard tolerance of the coil can be increased, so that the coil can be easily formed. b. The gap between the joint surface between the pot-shaped core and the plate-shaped lid core is an air inlet / outlet. At the time of joining, the air in the coil housing becomes a sealed state, and the air expands and acts to separate the joint surface. To prevent deterioration. c. The gap between the joining surface of the pot-shaped core and the lid core is an air inlet / outlet.
The air expands and goes out of the joint surface to the outside.At this time, an entrance and exit with fine outside air is made, and the moisture of the outside air enters from here,
Due to the entrance and exit of the minute outside air, there is a possibility that dew condensation or the like may occur when the humidity is not completely outside, and this phenomenon leading to dielectric breakdown is prevented. d. The gap between the joint surface between the pot-shaped core and the lid core is an air inlet / outlet, and the air in the sealed state of the coil housing expands and contracts when heating to mount components on the board. This phenomenon may lead to a short circuit due to being drawn into the coil housing, and this phenomenon leading to dielectric breakdown is prevented. e. By making the outer leg of the pot-shaped core thick except for the periphery of the through-hole, a sufficient area can be secured at the time of joining the lid core, and the pseudo cross-sectional area of the core increases to improve the magnetic coupling. f. The gap between the joining surface of the pot-shaped core and the lid core has the effect of releasing the heated air of the heated coil to the outside and suppressing an increase in the temperature of the product. g. The layer winding structure, in which two coils are located inside and outside the winding shaft, has the same outer diameter of the coil under the same conditions (number of turns, winding diameter, wire) as compared to the bifilar winding that is often used in common mode. However, the total length of the coil portion can be formed as short as possible. By arranging this part in the vertical direction, it is easy to design parts such as height limitation, miniaturization, and high reliability as a surface mount part.
【００１７】[0017]
【発明の効果】本発明によると、内コイルと外コイルの
インダクタンスが接近し或いはほぼ同一になり、部品の
方向性がなくなると共に、生産性が向上し、また雑音端
子電圧に対する回路設計が容易になる。According to the present invention, the inductances of the inner coil and the outer coil are close or almost the same, the directionality of the parts is lost, the productivity is improved, and the circuit design for the noise terminal voltage is facilitated. Become.
【図１】本発明に係わるつぼ型コアを用いたコイル部品
の分解斜視図である。FIG. 1 is an exploded perspective view of a coil component using a crucible core according to the present invention.
【図２】本発明に係わるつぼ型コアの平面図である。FIG. 2 is a plan view of a crucible core according to the present invention.
【図３】本発明に係わるつぼ型コアの正面図である。FIG. 3 is a front view of a crucible core according to the present invention.
【図４】本発明のコイルの平面図である。FIG. 4 is a plan view of the coil of the present invention.
【図５】本発明のコイル部品の平面図である。FIG. 5 is a plan view of the coil component of the present invention.
【図６】本発明のコイルの側面図である。FIG. 6 is a side view of the coil of the present invention.
【図７】本発明のコイルの正面図である。FIG. 7 is a front view of the coil of the present invention.
【図８】本発明のコイル部品の組立の初期状態を示す底
面図である。FIG. 8 is a bottom view showing an initial state of assembly of the coil component of the present invention.
【図９】本発明のコイル部品の組立の初期状態を示す断
面図である。FIG. 9 is a sectional view showing an initial state of assembly of the coil component of the present invention.
【図１０】本発明によりコイルの端子を外部電極にハン
ダ接続する初期段階を示す。FIG. 10 shows an initial stage of soldering a coil terminal to an external electrode according to the present invention.
【図１１】コイルの端子を外部電極にハンダ接続する中
間段階を示す。FIG. 11 shows an intermediate stage of soldering the terminals of the coil to the external electrodes.
【図１２】コイルの端子を外部電極にハンダ接続する終
期段階を示す。FIG. 12 shows a final stage of soldering a terminal of the coil to an external electrode.
【図１３】本発明によるつぼ型コアと板状コアの間の隙
間を示し、（ａ），（ｂ），（ｃ）はそれぞれ別の例を
示す。FIG. 13 shows a gap between a pot-shaped core and a plate-shaped core according to the present invention, and (a), (b) and (c) show different examples.
【図１４】本発明のコイルの端子を外部電極にハンダ接
続するフローハンダ法を示す。FIG. 14 shows a flow soldering method of soldering terminals of a coil of the present invention to external electrodes.
【図１５】本発明のコイルの端子を外部電極にハンダ接
続する他の方法を示す。FIG. 15 shows another method for soldering the terminals of the coil of the present invention to external electrodes.
【図１６】コイルの巻き型がバイファイラ巻きである場
合を示す概念図である。FIG. 16 is a conceptual diagram showing a case where the winding type of the coil is bifilar winding.
【図１７】コイルの巻き型が重ね巻き（レイヤー巻き）
である場合を示す概念図である。FIG. 17 is a diagram of a coil wound in a layered manner (layer winding)
It is a conceptual diagram which shows the case where it is.
【図１８】本発明のコイルの重ね巻き（レイヤー巻き）
構成を示す概念図である。FIG. 18 shows a lap winding (layer winding) of the coil of the present invention.
It is a conceptual diagram which shows a structure.
【図１９】特開平１０−２２１４０号に記載されたつぼ
型コアを利用した従来のコイル部品の断面図である。FIG. 19 is a sectional view of a conventional coil component using a crucible core described in Japanese Patent Application Laid-Open No. 10-22140.
【図２０】本発明の複合コイルを製作するための内側コ
イルを巻く最初の工程を示す。FIG. 20 illustrates an initial step of winding an inner coil to make a composite coil of the present invention.
【図２１】図２０に続く工程を示す図である。FIG. 21 is a view showing a step following the step shown in FIG. 20.
【図２２】図２１に続き外側コイルを巻く最初の工程を
示す図である。FIG. 22 is a diagram showing an initial step of winding the outer coil following FIG. 21;
【図２３】図２２に続く工程を示す図である。FIG. 23 is a view showing a step following the step shown in FIG. 22;
【図２４】図２３に続く工程を示す図である。FIG. 24 is a view showing a step following the step shown in FIG. 23.
【図２５】図２３に続く最後の工程を示す図である。FIG. 25 is a view showing the last step following FIG. 23;
【図２６】本発明の複合コイルを形成するための装置を
示す斜視図である。FIG. 26 is a perspective view showing an apparatus for forming a composite coil of the present invention.
【図２７】本発明の複合コイルを形状保持性にする１つ
の方法を示す図である。FIG. 27 illustrates one method of making a composite coil of the present invention shape-retaining.
１：つぼ型コアの内側脚部 ２：つぼ型コアの外側脚部 ３：つぼ型コアの端壁 ４：貫通孔 ５：つぼ型コア ６ａ：内側コイル ６ｂ：外側コイル ８ａ，８ｂ：端子 １０ａ：コイル間隙間 １０ｂ：内コイルと内側脚部の間の隙間 １１：蓋コア １２：凹部 １４：外部電極 １５：孔内電極 １６：ハンダ 1: inner leg of pot-shaped core 2: outer leg of pot-shaped core 3: end wall of pot-shaped core 4: through hole 5: pot-shaped core 6a: inner coil 6b: outer coil 8a, 8b: terminal 10a: Coil gap 10b: Gap between inner coil and inner leg 11: Lid core 12: Concave part 14: External electrode 15: In-hole electrode 16: Solder
フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｈ０１Ｆ 37/00 Ｈ０１Ｆ 37/00 Ａ Continued on the front page (51) Int.Cl. 6 Identification code FI H01F 37/00 H01F 37/00 A
Claims (10)
ぼ型コアと、前記つぼ型コアに嵌合された形状保持性の
コイルと、前記つぼ型コアの開放端に接合された蓋コア
とよりなり、前記貫通孔には前記コイルの端子が前記端
面から外部に突出しないように配置し、前記端壁外面に
は、前記端子と接続する膜状外部電極を形成した、コイ
ル部品において、前記コイルは前記内側脚部の周りに巻
かれる内コイルと、その外側に巻かれる外コイルとより
なり、前記内コイルと外コイルの間には隙間を設け前記
外コイルの長さを前記内コイルに直接巻いた場合よりも
大きくしたことを特徴とする、コイル部品。1. A crucible core having an inner leg and a through hole in an end wall, a shape-retaining coil fitted to the crucible core, and joined to an open end of the crucible core. A coil component comprising a lid core, wherein a terminal of the coil is disposed in the through hole so as not to protrude from the end face to the outside, and a film-like external electrode connected to the terminal is formed on an outer surface of the end wall. In the above, the coil comprises an inner coil wound around the inner leg, and an outer coil wound outside the inner coil, a gap is provided between the inner coil and the outer coil, and the length of the outer coil is set to A coil component characterized by being larger than when wound directly on an inner coil.
％以内の差となるように前記隙間と、内コイルよりも外
コイルの長さが定められている請求項１のコイル部品。2. The internal and external coils have an inductance of 10
The coil component according to claim 1, wherein the length of the gap and the length of the outer coil are determined more than the length of the inner coil so that the difference is within%.
外コイルのインダクタンスがほぼ等しくなるように定め
られている請求項２のコイル部品。3. The coil component according to claim 2, wherein a length and a gap of the inner and outer coils are determined so that inductances of the inner and outer coils are substantially equal.
有する請求項１ないし３のいずれかのコイル部品。4. The coil component according to claim 1, wherein said gap has a size larger than a diameter of said coil.
けた請求項１ないし３のいずれかのコイル部品。5. The coil component according to claim 1, wherein a gap is provided between the inner leg and the inner coil.
された外コイルとよりなる形状保持性の複合コイルにお
いて、前記内コイルと外コイルの間には隙間を設け前記
外コイルの長さを前記内コイルに直接巻いた場合よりも
大きくしたことを特徴とする複合コイル。6. A shape-retaining composite coil comprising an inner coil and an outer coil disposed outside the inner coil, wherein a gap is provided between the inner coil and the outer coil to provide a length of the outer coil. Characterized in that it is larger than when it is wound directly on the inner coil.
％以内の差となるように前記内外コイルの長さ及び隙間
が定められている請求項６のコイル。7. The internal and external coils have an inductance of 10
7. The coil according to claim 6, wherein the length and the gap of the inner and outer coils are determined so that the difference is within%.
外コイルのインダクタンスがほぼ等しくなるように定め
られている請求項６のコイル。8. The coil according to claim 6, wherein a length and a gap of the inner and outer coils are determined such that inductances of the inner and outer coils are substantially equal.
有する請求項６ないし８のいずれかのコイル。9. The coil according to claim 6, wherein said gap has a size larger than a diameter of said coil.
れる請求項６ないし８のいずれかのコイル。10. The coil according to claim 6, wherein the overlapping portions of the inner and outer coils are bonded to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04317299A JP3197530B2 (en) | 1998-02-27 | 1999-02-22 | Surface mount components using pot type core |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10-61919 | 1998-02-27 | ||
| JP6191998 | 1998-02-27 | ||
| JP04317299A JP3197530B2 (en) | 1998-02-27 | 1999-02-22 | Surface mount components using pot type core |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11317309A true JPH11317309A (en) | 1999-11-16 |
| JP3197530B2 JP3197530B2 (en) | 2001-08-13 |
Family
ID=26382918
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04317299A Expired - Lifetime JP3197530B2 (en) | 1998-02-27 | 1999-02-22 | Surface mount components using pot type core |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3197530B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7236137B2 (en) | 2003-02-28 | 2007-06-26 | Sony Corporation | Earphone antenna, composite coil and coaxial cable used therefor, and wireless device provided with the earphone antenna |
| JP2012525009A (en) * | 2009-04-24 | 2012-10-18 | クーパー テクノロジーズ カンパニー | Magnetic device for surface mounting |
| JP2019192791A (en) * | 2018-04-25 | 2019-10-31 | Tdk株式会社 | Coil component |
-
1999
- 1999-02-22 JP JP04317299A patent/JP3197530B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7236137B2 (en) | 2003-02-28 | 2007-06-26 | Sony Corporation | Earphone antenna, composite coil and coaxial cable used therefor, and wireless device provided with the earphone antenna |
| JP2012525009A (en) * | 2009-04-24 | 2012-10-18 | クーパー テクノロジーズ カンパニー | Magnetic device for surface mounting |
| JP2019192791A (en) * | 2018-04-25 | 2019-10-31 | Tdk株式会社 | Coil component |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3197530B2 (en) | 2001-08-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2978117B2 (en) | Surface mount components using pot type core | |
| KR100312255B1 (en) | face-mounting coil parts using pot type core and composite coil therefor | |
| JP3091713B2 (en) | Wound type chip balun transformer | |
| JPH0821505B2 (en) | Electronic device and manufacturing method thereof | |
| EP0741395A1 (en) | Post-mountable planar magnetic device and method of manufacture thereof | |
| JP3522577B2 (en) | Common mode choke coil | |
| JPH11251164A (en) | Compact choke coil | |
| JP3197530B2 (en) | Surface mount components using pot type core | |
| JP2004103815A (en) | Surface mount choke coil | |
| JPH07335449A (en) | Coil part | |
| JPH11176659A (en) | Chip-type short coil element | |
| JP2603136Y2 (en) | AC inlet filter connector | |
| JP3255621B2 (en) | Surface mount choke coil | |
| JPH0555062A (en) | Choke coil and fabrication thereof | |
| JP2001006940A (en) | Surface mounting toroidal coil | |
| JP2596526Y2 (en) | Flexible coil with printed circuit board for motor | |
| JPS59162737A (en) | Motor coil | |
| JP3500954B2 (en) | Signal emission | |
| JPH02146706A (en) | Chip inductor | |
| JPH0799124A (en) | Surface mounting coil | |
| JPH03203545A (en) | Motor | |
| JP2003332157A (en) | Trigger coil | |
| JPS6127151Y2 (en) | ||
| JP2000286136A (en) | Line filter | |
| JPS5852657Y2 (en) | high frequency coil |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20010522 |
|
| S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080608 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090608 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090608 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100608 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110608 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120608 Year of fee payment: 11 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120608 Year of fee payment: 11 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130608 Year of fee payment: 12 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20140608 Year of fee payment: 13 |
|
| EXPY | Cancellation because of completion of term |