JPH1154315A - Bobbin - Google Patents
BobbinInfo
- Publication number
- JPH1154315A JPH1154315A JP21081697A JP21081697A JPH1154315A JP H1154315 A JPH1154315 A JP H1154315A JP 21081697 A JP21081697 A JP 21081697A JP 21081697 A JP21081697 A JP 21081697A JP H1154315 A JPH1154315 A JP H1154315A
- Authority
- JP
- Japan
- Prior art keywords
- winding
- lower flange
- flange portion
- bobbin
- lead wire
- 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.)
- Withdrawn
Links
Landscapes
- Insulating Of Coils (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、コイル，トランス
などの各種インダクタンス素子に適用されるボビンに関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bobbin applied to various inductance elements such as a coil and a transformer.
【０００２】[0002]
【発明が解決しようとする課題】一般に、この種のイン
ダクタンス素子のなかで、例えばスイッチング電源装置
のインバータ回路に適用される主トランスは、例えばプ
ラスチック製のボビンの胴部に一次巻線と二次巻線とを
各々巻回すると共に、これらの各巻線の端部にある引出
し線を、ボビンの下部フランジ部に固着した対向する複
数の接続ピンに各々接続して、磁気回路であるコアにボ
ビンを装着する構造を有している。そして、プリント基
板への実装に際しては、プリント基板に形成されたスル
ーホールに、前記主トランスの各接続ピンを挿入した
後、この接続ピンとスルーホールの周辺に設けたランド
部とを半田付け接続することにより、主トランスとプリ
ント基板双方の固定を図るようにしていた。In general, among these types of inductance elements, a main transformer applied to, for example, an inverter circuit of a switching power supply unit has a primary winding and a secondary winding on a body of a plastic bobbin, for example. Each of the windings is wound, and a lead wire at an end of each of the windings is connected to a plurality of opposed connection pins fixed to a lower flange portion of the bobbin, respectively. Is mounted. When mounting on a printed circuit board, each connection pin of the main transformer is inserted into a through hole formed in the printed circuit board, and then the connection pin and a land provided around the through hole are connected by soldering. Thus, both the main transformer and the printed circuit board are fixed.
【０００３】図２は、従来の巻線を巻装したボビンの正
面図を示したものである。同図において、１は図示しな
いコアがその中央部を挿通する中空筒状の胴部である。
この胴部１は、いずれも鍔状の上フランジ部２と下フラ
ンジ部３との間に設けられる。これらの上フランジ部２
と下フランジ部３は、胴部１の外周上端および外周下端
より水平方向すなわち放射方向に延びて形成されてい
る。胴部１の外周には、巻線に相当する一次巻線４およ
び二次巻線５が巻装されるが、この一次巻線４と二次巻
線５の巻装部６，７を区画するために、前記上フランジ
部２や下フランジ部３と同様に鍔状をなす中央フランジ
部としてのバリア８，９が、胴部１の外周より放射方向
に延びて設けられる。ここでは、バリア８，９間に一次
巻線４の巻装部６が設けられ、上フランジ部２とバリア
８間、およびバリア９と下フランジ部３間に二次巻線５
の巻装部７が設けられている。FIG. 2 is a front view of a bobbin on which a conventional winding is wound. In the figure, reference numeral 1 denotes a hollow cylindrical body into which a core (not shown) is inserted through the center.
The body 1 is provided between the flange-shaped upper flange 2 and the lower flange 3. These upper flanges 2
The lower flange portion 3 is formed so as to extend in a horizontal direction, that is, in a radial direction from an outer peripheral upper end and an outer peripheral lower end of the body portion 1. A primary winding 4 and a secondary winding 5 corresponding to windings are wound around the outer periphery of the body 1, and the winding portions 6 and 7 of the primary winding 4 and the secondary winding 5 are partitioned. To this end, barriers 8 and 9 as central flange portions having a flange shape like the upper flange portion 2 and the lower flange portion 3 are provided to extend radially from the outer periphery of the body portion 1. Here, the winding part 6 of the primary winding 4 is provided between the barriers 8 and 9, and the secondary winding 5 is provided between the upper flange 2 and the barrier 8 and between the barrier 9 and the lower flange 3.
Is provided.
【０００４】正面からみてボビンの左側すなわち一側に
は、一次巻線４の巻装部６から端部たる引出し線11が引
出されていると共に、ボビンの右側すなわち他側には、
二次巻線５の巻装部７から端部たる別の引出し線12が引
出されている。また、これらの引出し線11，12に対応し
て、下フランジ部３の底部両側には、複数の導電性の接
続ピン13，14が下方に突出して並設される。引出し線1
1，12を接続する接続ピン13，14は、図示しないプリン
ト基板のスルーホールに挿入可能なピッチ（幅）で各々
が配設されており、接続ピン13，14をプリント基板のラ
ンド部と半田付け接続することで、外部との電気的接続
を図るようにしている。On the left side, ie, one side of the bobbin, as viewed from the front, a lead wire 11 which is an end from the winding portion 6 of the primary winding 4 is drawn out, and on the right side, ie, the other side, of the bobbin.
Another lead wire 12 is drawn from the winding portion 7 of the secondary winding 5 as an end. In addition, a plurality of conductive connection pins 13 and 14 are juxtaposed on both sides of the bottom portion of the lower flange portion 3 so as to correspond to these lead wires 11 and 12 and protrude downward. Leader 1
The connection pins 13 and 14 for connecting 1 and 12 are arranged at a pitch (width) that can be inserted into a through hole of a printed circuit board (not shown), and the connection pins 13 and 14 are soldered to lands of the printed circuit board. The electrical connection with the outside is made by attaching and connecting.
【０００５】各引出し線11，12は、張設状態で接続ピン
13，14に接続されており、一次巻線４の引出し線11は、
バリア９および下フランジ部３の一側に接していると共
に、二次巻線５の引出し線12は、バリア８，９および下
フランジ部３の他側に接している。この各引出し線11，
12の接する水平方向にあるバリア８，９の幅は、図２の
破線に示してあるように、同一方向にある上フランジ部
２および下フランジ部３の幅と略同一に形成される。Each of the lead wires 11 and 12 is connected to a connecting pin
13 and 14, and the lead wire 11 of the primary winding 4 is
The lead wire 12 of the secondary winding 5 is in contact with the barrier 9 and one side of the lower flange 3, and is in contact with the barriers 8 and 9 and the other side of the lower flange 3. Each of these leader lines 11,
As shown by broken lines in FIG. 2, the width of the barriers 8 and 9 in the horizontal direction in contact with 12 is formed to be substantially the same as the width of the upper flange portion 2 and the lower flange portion 3 in the same direction.
【０００６】ところで、上記構成のボビンは、接続ピン
13に接続する一次巻線４の引出し線11が、バリア９の側
部から下フランジ部３の側部を通過する際に、二次巻線
５の巻装部７の外周に沿って近接する。同様に、接続ピ
ン14に接続する二次巻線５の引出し線12も、バリア８の
側部からバリア９の側部を通過する際に、一次巻線４の
巻装部６の外周に沿って近接する。このように、一次巻
線４と二次巻線５が引出し線11，12の引出し部分で近接
あるいは接触すると、一次巻線４と二次巻線５との間の
結合容量が大きくなって、耐ノイズ性が悪くなるという
問題を有していた。By the way, the bobbin having the above-described structure is provided with connecting pins.
When the lead wire 11 of the primary winding 4 connected to 13 passes from the side of the barrier 9 to the side of the lower flange portion 3, it comes close to the outer periphery of the winding portion 7 of the secondary winding 5. . Similarly, the lead wire 12 of the secondary winding 5 connected to the connection pin 14 also passes along the outer periphery of the winding part 6 of the primary winding 4 when passing from the side of the barrier 8 to the side of the barrier 9. And approach. As described above, when the primary winding 4 and the secondary winding 5 come close to or come into contact with each other at the lead portions of the lead wires 11 and 12, the coupling capacitance between the primary winding 4 and the secondary winding 5 increases, There was a problem that the noise resistance deteriorated.
【０００７】このような問題に対しては、ボビンの全体
形状を水平方向に拡げて、前記引出し線11と二次巻線５
の巻装部７、および引出し線12と一次巻線４の巻装部６
間を離間させることが考えられる。しかし、接続ピン1
3，14は引出し線11，12との接続の関係上、下フランジ
部３のできるだけ両端部に設けたほうが好ましいので、
接続ピン13，14間のピッチが拡がってしまい、プリント
基板にそのまま装着できなくなる。また、ボビンが水平
方向に大きく拡がるため、占有面積が増大して他の部品
の実装にも支障を来たす問題を生じる。To solve such a problem, the overall shape of the bobbin is expanded in the horizontal direction so that the lead wire 11 and the secondary winding 5 are expanded.
And the winding part 6 of the lead wire 12 and the primary winding 4
It is conceivable to separate them. However, connection pin 1
It is preferable to provide the lower flanges 3 and 14 at both ends of the lower flange 3 as much as possible due to the connection with the lead wires 11 and 12.
The pitch between the connection pins 13 and 14 is widened and cannot be directly mounted on the printed circuit board. In addition, since the bobbin greatly expands in the horizontal direction, the area occupied by the bobbin increases, which causes a problem that mounting of other components is hindered.
【０００８】そこで、本発明は上記問題点に鑑み、接続
ピンのピッチを変えずに、占有面積を極力増加させるこ
となく、巻線間の結合容量を小さくすることのできるボ
ビンを提供することをその目的とする。Accordingly, the present invention has been made in view of the above problems, and has as its object to provide a bobbin capable of reducing the coupling capacitance between the windings without changing the pitch of the connection pins and increasing the occupied area as much as possible. With that purpose.
【０００９】[0009]
【課題を解決するための手段】本発明におけるボビン
は、上フランジ部と下フランジ部との間に巻線が巻装さ
れる胴部を設け、この胴部に中間フランジ部を設けて前
記巻線の巻装部を複数に区画すると共に、前記巻線の端
部が接続される接続ピンを前記下フランジ部に設けたボ
ビンにおいて、前記巻線の端部が接する前記中間フラン
ジ部の外側接触部を、同じ方向にある前記下フランジ部
の最外側部よりも、外方に突出形成したものである。The bobbin according to the present invention is provided with a body portion around which a winding is wound between an upper flange portion and a lower flange portion, and an intermediate flange portion provided on the body portion. In a bobbin provided with a connecting pin to which an end of the winding is connected on the lower flange while the winding part of the wire is divided into a plurality of parts, an outer contact of the intermediate flange with which the end of the winding contacts. The portion is formed so as to protrude outward from the outermost portion of the lower flange portion in the same direction.
【００１０】上記構成によれば、下フランジ部の外形寸
法を変えずに、中間フランジ部の外側接触部を外方に突
出させることで、巻線の端部と別の巻線の巻装部との間
を離間させることができる。これにより、中間フランジ
部により区画された巻線間の結合容量を小さくして、耐
ノイズ性を向上させることが可能になる。また、下フラ
ンジ部の外形寸法は変らないので、この下フランジ部に
設けた接続ピンのピッチを変更する必要もない。さら
に、外方に突出させる部分は、中間フランジ部の外側接
触部だけでよいので、占有面積の増加を極力抑制でき
る。According to the above configuration, the outer contact portion of the intermediate flange portion is projected outward without changing the outer dimensions of the lower flange portion, so that the end portion of the winding and the winding portion of another winding are formed. Can be separated. As a result, it is possible to reduce the coupling capacitance between the windings defined by the intermediate flange portion and improve the noise resistance. Further, since the outer dimensions of the lower flange portion do not change, there is no need to change the pitch of the connection pins provided on the lower flange portion. Furthermore, since the portion that protrudes outward only needs to be the outer contact portion of the intermediate flange portion, an increase in occupied area can be suppressed as much as possible.
【００１１】[0011]
【発明の実施形態】以下、本発明におけるボビンの一実
施例について、図１を参照しながら説明する。なお、従
来例で示した図２と同一部分には同一符号を付し、その
共通する箇所の詳細な説明は重複するため省略する。本
実施例では、上フランジ部２と下フランジ部３の外形寸
法をそのままとし、一次巻線４の引出し線11が接するバ
リア９の外側接触部21を、同じ方向にある上フランジ部
２の一側の最外側部22と、下フランジ部３の一側の最外
側部23よりも外方水平方向に突出形成させると共に、二
次巻線５の引出し線12が接するバリア８の外側接触部24
およびバリア９の外側接触部25を、同じ方向にある上フ
ランジ部２の他側の最外側部26と、下フランジ部３の他
側の最外側部27よりも外方水平方向に突出形成させた点
が、従来例の図２と異なっている。その他の構成は、前
記図２と全く同一である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the bobbin according to the present invention will be described below with reference to FIG. The same parts as those in FIG. 2 shown in the conventional example are denoted by the same reference numerals, and detailed description of common parts will be omitted because they are duplicated. In the present embodiment, the outer dimensions of the upper flange portion 2 and the lower flange portion 3 are kept as they are, and the outer contact portion 21 of the barrier 9 with which the lead wire 11 of the primary winding 4 contacts is connected to the upper flange portion 2 in the same direction. And an outer contact portion 24 of the barrier 8 with which the lead wire 12 of the secondary winding 5 is in contact with the outermost portion 22 of the lower side and the outermost portion 23 of one side of the lower flange portion 3.
And the outer contact portion 25 of the barrier 9 is formed so as to protrude outward in the horizontal direction from the outermost portion 26 on the other side of the upper flange portion 2 and the outermost portion 27 on the other side of the lower flange portion 3 in the same direction. This is different from the conventional example shown in FIG. Other configurations are exactly the same as those in FIG.
【００１２】なお、図示していないが、引出し線11が接
触する外側接触部21や、引出し線12が接触する外側接触
部24，25に、これらの引出し線11，12を案内する切欠溝
を形成してもよい。このようにすると、引出し線11，12
がバリア８，９の最外側面に沿って動かなくなり、製造
性が向上する。また、引出し線11，12が接触する下フラ
ンジ部３の外側接触部も、同様に切欠溝を設けて引出し
線11，12を所定位置に案内させるのが好ましい。さら
に、図１に示すように、バリア８，９はその片側のみな
らず両側を水平方向に突出させてよい。但し、バリア
８，９の側部全長にわたって外方に突出させる必要はな
く、少なくとも、引出し線11が接触する外側接触部21
と、引出し線12が接触する外側接触部24，25が外方に突
出してあればよい。このようにすると、不必要なボビン
の外方への突出部分を減らすことができ、占有面積を極
力増大させないようにすることが可能になる。Although not shown, cutout grooves for guiding the lead wires 11 and 12 are formed in the outer contact portion 21 where the lead wire 11 contacts and the outer contact portions 24 and 25 where the lead wire 12 contacts. It may be formed. In this case, the lead wires 11, 12
Does not move along the outermost surfaces of the barriers 8 and 9, thereby improving the manufacturability. In addition, it is preferable that a cutout groove is similarly provided on the outer contact portion of the lower flange portion 3 with which the lead wires 11 and 12 come into contact, to guide the lead wires 11 and 12 to a predetermined position. Further, as shown in FIG. 1, the barriers 8 and 9 may project not only on one side but also on both sides in the horizontal direction. However, it is not necessary to protrude outwardly over the entire length of the side portions of the barriers 8 and 9, and at least the outer contact portion 21 with which the lead wire 11 contacts
The outer contact portions 24 and 25 with which the lead wire 12 comes into contact need only protrude outward. By doing so, unnecessary protrusions of the bobbin to the outside can be reduced, and the occupied area can be prevented from increasing as much as possible.
【００１３】本実施例のボビンは、上フランジ部２と下
フランジ部３との間に巻線たる一次巻線４および二次巻
線５が巻装される胴部１を設け、この胴部１に中間フラ
ンジ部たるバリア８，９を設けて，一次巻線４および二
次巻線５の各巻装部６，７を複数に区画すると共に、一
次巻線４および二次巻線５の端部である引出し線11，12
が接続される接続ピン13，14を、下フランジ部３に設け
たものにおいて、一次巻線４の引出し線11が接触するバ
リア９の外側接触部21を、同じ方向にある下フランジ部
３の最外側部23より外方に突出形成させ、また、二次巻
線５の引出し線12が接触するバリア８の外側接触部24お
よびバリア９の外側接触部25を、同じ方向にある下フラ
ンジ部３の最外側部27より外方に突出形成させた構造を
有している。The bobbin of this embodiment is provided with a body 1 around which a primary winding 4 and a secondary winding 5 are wound between an upper flange portion 2 and a lower flange portion 3. 1 are provided with barriers 8 and 9 as intermediate flange portions to divide the winding portions 6 and 7 of the primary winding 4 and the secondary winding 5 into a plurality of portions, and to end the primary winding 4 and the secondary winding 5. Leader wires 11 and 12
Are provided on the lower flange portion 3, and the outer contact portion 21 of the barrier 9 with which the lead wire 11 of the primary winding 4 contacts is connected to the lower flange portion 3 in the same direction. The outer contact portion 24 of the barrier 8 and the outer contact portion 25 of the barrier 9 with which the lead wire 12 of the secondary winding 5 comes into contact are formed so as to protrude outward from the outermost portion 23. 3 has a structure formed so as to protrude outward from the outermost portion 27.
【００１４】このようにすると、下フランジ部３の外形
寸法を変えずに、バリア８の外側接触部21を外方に突出
させ、かつ、バリア８，９の外側接触部24，25を外方に
突出させることにより、一次巻線４の引出し線11と二次
巻線５の巻装部７との間、および二次巻線５の引出し線
12と一次巻線４の巻装部６との間を離間させることがで
きる。これにより、一次巻線４と二次巻線５との間の結
合容量を小さくして、耐ノイズ性を向上させることが可
能になる。また、下フランジ部３の外形寸法は変らない
ので、この下フランジ部３に設けた接続ピン13，14のピ
ッチを変更する必要もない。さらに、外方に突出させる
部分は、バリア８，９の外側接触部21，24，25だけでよ
いので、占有面積の増加を極力抑制できる。Thus, the outer contact portions 21 of the barrier 8 are projected outward without changing the outer dimensions of the lower flange portion 3, and the outer contact portions 24, 25 of the barriers 8, 9 are moved outward. , The lead wire 11 of the primary winding 4 and the winding portion 7 of the secondary winding 5 and the lead wire of the secondary winding 5
The distance between the winding 12 and the winding portion 6 of the primary winding 4 can be separated. This makes it possible to reduce the coupling capacitance between the primary winding 4 and the secondary winding 5 and improve the noise resistance. Further, since the outer dimensions of the lower flange portion 3 do not change, it is not necessary to change the pitch of the connection pins 13 and 14 provided on the lower flange portion 3. Further, since only the outer contact portions 21, 24 and 25 of the barriers 8 and 9 need to be protruded outward, an increase in occupied area can be suppressed as much as possible.
【００１５】なお、本発明は上記実施例に限定されるも
のではなく、本発明の要旨の範囲において種々の変形実
施が可能である。本実施例におけるボビンは、スイッチ
ング電源装置のインバータ回路に用いられる主トランス
に限らず、コイルやインダクタなどの各種インダクタン
ス素子に適用できる。また、実施例では、中間フランジ
部たるバリア８，９が２個設けられているが、その数に
限定されるものではない。要は、中間フランジ部で巻線
の巻装部が複数に区画されていればよい。The present invention is not limited to the above embodiment, and various modifications can be made within the scope of the present invention. The bobbin in the present embodiment is not limited to the main transformer used in the inverter circuit of the switching power supply device, but can be applied to various inductance elements such as coils and inductors. Further, in the embodiment, two barriers 8, 9 serving as intermediate flange portions are provided, but the number is not limited thereto. In short, it is only necessary that the winding portion of the winding is divided into a plurality at the intermediate flange portion.
【００１６】[0016]
【発明の効果】本発明のボビンは、上フランジ部と下フ
ランジ部との間に巻線が巻装される胴部を設け、この胴
部に中間フランジ部を設けて前記巻線の巻装部を複数に
区画すると共に、前記巻線の端部が接続される接続ピン
を前記下フランジ部に設けたボビンにおいて、前記巻線
の端部が接する前記中間フランジ部の外側接触部を、同
じ方向にある前記下フランジ部の最外側部よりも、外方
に突出形成したものであり、接続ピンのピッチを変えず
に、占有面積を極力増加させることなく、巻線間の結合
容量を小さくすることができる。According to the bobbin of the present invention, a body portion on which a winding is wound is provided between an upper flange portion and a lower flange portion, and an intermediate flange portion is provided on the body portion to wind the winding. In the bobbin provided with a connection pin to which the end of the winding is connected on the lower flange portion, the outer contact portion of the intermediate flange portion with which the end of the winding contacts is the same. It is formed so as to protrude outward from the outermost portion of the lower flange portion in the direction, without changing the pitch of the connection pins, without increasing the occupied area as much as possible, and reducing the coupling capacity between the windings. can do.
【図１】本発明の一実施例を示す巻線を巻装したボビン
の正面図である。FIG. 1 is a front view of a bobbin on which windings are wound according to an embodiment of the present invention.
【図２】従来例における巻線を巻装したボビンの正面図
である。FIG. 2 is a front view of a bobbin on which a conventional winding is wound.
１ 胴部 ２ 上フランジ部 ３ 下フランジ部 ４ 一次巻線（巻線） ５ 二次巻線（巻線） ８，９ バリア（中間フランジ部） 11，12 引出し線（端部） 13，14 接続ピン 21，24，25 外側接触部 26，27 最外側部 1 Body 2 Upper flange 3 Lower flange 4 Primary winding (winding) 5 Secondary winding (winding) 8, 9 Barrier (intermediate flange) 11, 12 Leader wire (end) 13, 14 Connection Pins 21, 24, 25 Outer contact part 26, 27 Outermost part
Claims (1)
線が巻装される胴部を設け、この胴部に中間フランジ部
を設けて前記巻線の巻装部を複数に区画すると共に、前
記巻線の端部が接続される接続ピンを前記下フランジ部
に設けたボビンにおいて、前記巻線の端部が接する前記
中間フランジ部の外側接触部を、同じ方向にある前記下
フランジ部の最外側部よりも、外方に突出形成したこと
を特徴とするボビン。1. A body part on which a winding is wound is provided between an upper flange part and a lower flange part, and an intermediate flange part is provided on the body part to divide the winding part of the winding into a plurality. In the bobbin provided with a connection pin to which an end of the winding is connected on the lower flange portion, an outer contact portion of the intermediate flange portion with which the end of the winding contacts is connected to the lower flange in the same direction. A bobbin formed so as to protrude outward from an outermost portion of the portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21081697A JPH1154315A (en) | 1997-08-05 | 1997-08-05 | Bobbin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21081697A JPH1154315A (en) | 1997-08-05 | 1997-08-05 | Bobbin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1154315A true JPH1154315A (en) | 1999-02-26 |
Family
ID=16595606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21081697A Withdrawn JPH1154315A (en) | 1997-08-05 | 1997-08-05 | Bobbin |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1154315A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004087659A (en) * | 2002-08-26 | 2004-03-18 | Sumida Technologies Inc | High voltage transformer |
| JP2009252787A (en) * | 2008-04-01 | 2009-10-29 | Tdk Corp | Coil component |
-
1997
- 1997-08-05 JP JP21081697A patent/JPH1154315A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004087659A (en) * | 2002-08-26 | 2004-03-18 | Sumida Technologies Inc | High voltage transformer |
| JP2009252787A (en) * | 2008-04-01 | 2009-10-29 | Tdk Corp | Coil component |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2668545B2 (en) | Electric winding parts | |
| US7292126B2 (en) | Low noise planar transformer | |
| JP2015065413A (en) | Transformer | |
| US7277000B2 (en) | Inductor and transformer | |
| JP2605229Y2 (en) | Electromagnetic device having toroidal core | |
| JPH1154315A (en) | Bobbin | |
| EP0918342B1 (en) | Slit transformer | |
| JP2001313220A (en) | Inductance part | |
| US20040246087A1 (en) | Electric component and method of producing the same | |
| JP2002313641A (en) | Coil component | |
| JP3238862B2 (en) | Coil bobbin | |
| JP3513623B2 (en) | stator | |
| JP3016235B2 (en) | Trance | |
| KR100376989B1 (en) | Inverter transformer and starter circuit for discharge lamp using inverter transformer | |
| KR100444232B1 (en) | The second coil inserting type transformer and transbobin used therefor | |
| US5815378A (en) | Flyback transformer | |
| JP3696582B2 (en) | Inverter transformer | |
| CN212967359U (en) | Magnetic integrated transformer and vehicle-mounted power supply with same | |
| JP3085122B2 (en) | choke coil | |
| JP3409009B2 (en) | Switching transformer | |
| JP2000357614A (en) | Chamber type transformer and coil bobbin thereof | |
| JPH10241960A (en) | Winding parts | |
| JP3065501U (en) | Electric circuit device | |
| JPH0917664A (en) | Current transformer | |
| JPH0672224U (en) | Trance |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20041005 |