JPH09270341A

JPH09270341A - Transformer

Info

Publication number: JPH09270341A
Application number: JP9020339A
Authority: JP
Inventors: Masaya Yamamori; 雅也山盛; Nobukazu Nakajima; 伸和中嶋; Toshihisa Kitada; 敏久北田
Original assignee: Tabuchi Electric Co Ltd
Current assignee: Tabuchi Electric Co Ltd
Priority date: 1996-02-02
Filing date: 1997-02-03
Publication date: 1997-10-14
Anticipated expiration: 2017-02-03
Also published as: JP3640279B2

Abstract

PROBLEM TO BE SOLVED: To provide a transformer having a constitution enabling the improvement of the productivity and reduction of the size and ensuring a space and creep distance, meeting the safety specification between windings, without causing troubles such as electric short there between. SOLUTION: At least either prim. or sec. windings 16, 17b is made from a double insulated wire covered with insulation layers. A bobbin 10 has a main and auxiliary reels 11, 12 and intermediate flanges 14 disposed between the reels. Terminal pines 8A, 8B for the prim. and sec. windings are disposed at radially opposed first and second side parts F1, F2 of the flange 15 of the auxiliary reel 12 on the bobbin 10. A through-hole 14a having a width W1 ranging from 1/4 to 3/4 of the width W2 of a third or fourth side part F3 or F4 of the intermediate flange 14 locates at either the radially opposed part F3 or F4 and pierces from the end of the flange 14 to the bottom. The double insulated wire passes through this hole 14a.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【発明の属する技術分野】本発明は、例えば、スイッチ
ング電源装置に用いられるものであって、ボビンに一次
巻線と二次巻線とをボビンの径方向に重ねて巻回して小
型化を図った高周波電源用のトランスに関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used, for example, in a switching power supply device, and a primary winding and a secondary winding are wound around a bobbin so as to be wound in the radial direction of the bobbin to achieve miniaturization. It also relates to transformers for high frequency power supplies.

【０００２】[0002]

【従来の技術】小型化を図ることを目的とした高周波電
源用のトランスでは、一般に、ボビンに一次巻線と二次
巻線をボビンの径方向に重ねて巻回した構成になってい
る。この種のトランスでは、安全規格で定められた一次
巻線と二次巻線間の電気絶縁および空間・沿面距離の条
件を満足する必要がある。このような安全性を確保する
ために、一次巻線および二次巻線として、エナメルコー
ティング電線のような、電線の表面に単層の絶縁膜をコ
ーティングした軽絶縁電線を用いたトランスでは、コイ
ルボビンの巻枠部における軸心方向の両端部にそれぞれ
バリアテープを巻き付けることにより、一次巻線と二次
巻線との相互間に所要の空間・沿面距離を確保してい
る。しかし、このトランスでは、バリアテープの設置ス
ペース分だけコイルボビンの形状が大きくなるため、特
に、小型化を目的とする高周波電源用のトランスにおい
て、その要求に相反することになる。2. Description of the Related Art A transformer for a high-frequency power source, which is intended to be miniaturized, generally has a structure in which a primary winding and a secondary winding are wound around a bobbin in a radial direction of the bobbin. In this type of transformer, it is necessary to satisfy the conditions of the electrical insulation and the space / creep distance between the primary winding and the secondary winding, which are defined in the safety standard. To ensure such safety, transformers that use light-insulated wires, such as enamel-coated wires, that have a single-layer insulation film coated on the surface of the wire, such as enamel-coated wires, have coil bobbins. By winding a barrier tape around each end of the winding frame in the axial direction, a required space and creepage distance are secured between the primary winding and the secondary winding. However, in this transformer, the shape of the coil bobbin is increased by the space for installing the barrier tape, which is contrary to the requirement especially in the transformer for high frequency power supply for the purpose of downsizing.

【０００３】そこで、近年においては、図６に示すよう
に、三層に絶縁被覆を施した三層絶縁電線のような重絶
縁電線を用いて一次巻線１Ａ，１Ｂを形成することによ
り、バリアテープを除外したトランス（実開平7-42507
号公報）が案出されている。このトランスは、一層目と
四層目の各コイル巻層をそれぞれ形成する一次巻線１
Ａ，１Ｂに三層の絶縁被覆層を施すことにより、この一
次巻線１Ａ，１Ｂと、エナメルコーティング電線で形成
された二次巻線２Ａ，２Ｂとの間に所要の絶縁性を確保
している。また、コイル巻層間は、絶縁テープ４により
電気絶縁されている。コイルボビン５は、磁気回路を構
成する、例えば、Ｅ型コア部６ａとＩ型コア部６ｂから
なるＥＩ型コア６に取り付けられている。Therefore, in recent years, as shown in FIG. 6, the primary windings 1A and 1B are formed by using a heavy-insulated electric wire such as a three-layer insulated electric wire having three layers of insulating coatings, thereby forming a barrier. Transformer without tape (Actual Kaihei 7-42507
Issue) has been devised. This transformer has a primary winding 1 that forms each of the first and fourth coil winding layers.
By applying three layers of insulation coating to A and 1B, the required insulation is secured between the primary windings 1A and 1B and the secondary windings 2A and 2B formed of the enamel-coated electric wire. There is. The coil winding layers are electrically insulated by the insulating tape 4. The coil bobbin 5 is attached to, for example, an EI type core 6 including an E type core portion 6a and an I type core portion 6b, which constitutes a magnetic circuit.

【０００４】[0004]

【発明が解決しようとする課題】ところで、一次巻線１
Ａ，１Ｂを形成する三層絶縁電線の一次側端子ピン８Ａ
への接続は、一次巻線１Ａ，１Ｂの巻端部からの引出し
部１ａをコイルボビン５の一方（図の下方）のつば部５
ａの引出し溝５ｂから引出し、一方のつば部５ａとコイ
ルボビン５の端子板部５ｃとの間に設けられた引出し線
ガイド溝３を介して一次側の端子ピン８Ａまで導くとと
もに、その引出し部１ａの先端を半田Ｈ付けすることに
より行われる。そのため、前記引出し部１ａにおける図
６の平行横線で図示した半田付け処理部分Ｓ１の三層絶
縁被覆層が熱劣化により著しく絶縁性が低下する。この
三層絶縁電線は、絶縁性が低下すると、空間・沿面距離
を確保するための機能を失う。By the way, the primary winding 1
Primary-side terminal pin 8A of three-layer insulated wire forming A and 1B
In order to connect to the coil bobbin 5, the lead-out portion 1a from the winding ends of the primary windings 1A and 1B is connected to one of the coil bobbins 5 (downward in the drawing).
a is led out from the lead-out groove 5b and led to the primary side terminal pin 8A through the lead-out wire guide groove 3 provided between the one collar portion 5a and the terminal plate portion 5c of the coil bobbin 5, and the lead-out portion 1a Is performed by soldering the tip of the solder. Therefore, the three-layer insulation coating layer of the soldering treatment portion S1 shown by the parallel horizontal lines in FIG. 6 in the lead-out portion 1a is significantly deteriorated due to heat deterioration. This three-layer insulated wire loses its function of securing space and creepage distance when its insulation property deteriorates.

【０００５】そこで、コイルボビン５に上述の引出し線
ガイド溝３を設けるとともに、三層絶縁電線からなる一
次巻線１Ａの巻き始め端を、一次側の端子ピン８Ａに半
田Ｈ付けにより接続し、その引出し部１ａを引出し線ガ
イド溝３に沿ってコイルボビン５に対し約半周するよう
巻き付けたのちに、一方のつば部５ａの引出し溝５ｂを
通ってコイルボビン５の巻枠部に連続的に巻き付けてい
る。一次巻線１Ｂの巻き終わり端も、上述とは逆の経
路、つまり、引出し溝５ｂおよび引出し線ガイド溝３を
通って一次側の他の端子ピン８Ａに接続される。一方、
二次巻線２Ａ，２Ｂは、コイルボビン５の巻枠部におけ
る引出し部２ａが、引出し溝５ｂおよび引出し線ガイド
溝３をコイルボビン５の軸心方向に通って二次側の端子
ピン８Ｂに半田Ｈ付けにより接続される。それにより、
一次巻線１Ａ，１Ｂの引出し部１ａにおける絶縁被覆層
の熱劣化していない先端部Ｓ２と二次巻線２ａとの間
に、安全規格の規定を満足する空間・沿面距離Ｄを確保
している。Therefore, the lead wire guide groove 3 is provided on the coil bobbin 5, and the winding start end of the primary winding 1A made of a three-layer insulated wire is connected to the terminal pin 8A on the primary side by soldering H. The lead-out portion 1a is wound around the coil bobbin 5 along the lead-out wire guide groove 3 so as to make about a half turn, and then is continuously wound around the winding frame portion of the coil bobbin 5 through the lead-out groove 5b of the one collar portion 5a. . The winding end end of the primary winding 1B is also connected to the other terminal pin 8A on the primary side through the route opposite to the above, that is, the lead groove 5b and the lead wire guide groove 3. on the other hand,
In the secondary windings 2A and 2B, the lead-out portion 2a in the winding frame portion of the coil bobbin 5 passes through the lead-out groove 5b and the lead-out wire guide groove 3 in the axial direction of the coil bobbin 5 and is soldered to the terminal pin 8B on the secondary side. Connected by attaching. Thereby,
Secure a space / creep distance D that satisfies the regulations of the safety standard, between the secondary winding 2a and the tip S2 of the insulating coating layer in the lead-out portions 1a of the primary windings 1A and 1B that is not thermally deteriorated. There is.

【０００６】しかしながら、上記トランスは、安全規格
の規定を満足する空間・沿面距離Ｄを確保することはで
きるが、三層絶縁電線（図６では一次巻線１の場合を例
示）が、ほぼ直角に折り曲げられて引出し線ガイド溝３
から比較的狭い幅の引出し溝５ｂに導かれるようになっ
ているため、三層絶縁電線の直角に折り曲げられる部分
は、巻き付けるときに引出し溝５ｃの角部で強くこすれ
て、その絶縁被覆層が剥がれて絶縁破壊することがあ
る。しかも、一次と二次の両巻線１，２の各々の引出し
部１ａ，２ａは、互いに重ねるようにして単一の引出し
溝５ｂに挿通されるため、万一、三層絶縁電線に絶縁破
壊が生じると、両巻線１，２間が電気的に短絡するトラ
ブルが生じてトランスの寿命が短くなる。さらに、多出
力仕様の場合には、巻線の数が多くなることから、上記
の絶縁被覆層の剥がれが発生する可能性がさらに高くな
る上に、単一の引出し溝５ｂに巻線の多くの引出し部が
集中するために、混線状態が発生して引出しおよび半田
付け作業が難しくなり、生産の自動化が困難となる。However, although the above-mentioned transformer can secure a space / creep distance D satisfying the regulations of the safety standard, the three-layer insulated wire (the case of the primary winding 1 is illustrated in FIG. 6) is at a substantially right angle. Leader wire guide groove 3
Since it is guided to the drawing groove 5b having a relatively narrow width, the portion of the three-layer insulated wire that is bent at a right angle is strongly rubbed at the corner of the drawing groove 5c when winding, and the insulating coating layer is May peel off and cause dielectric breakdown. Moreover, since the lead-out portions 1a and 2a of the primary and secondary windings 1 and 2 are inserted into the single lead-out groove 5b so as to overlap each other, the three-layer insulated wire should be dielectrically broken. If this occurs, a trouble occurs in which the windings 1 and 2 are electrically short-circuited and the life of the transformer is shortened. Further, in the case of the multi-output specification, since the number of windings increases, the possibility that the above-mentioned insulation coating layer peels off further increases, and more windings are formed in a single extraction groove 5b. Since the lead-out portions of the above are concentrated, a mixed wire state occurs, and the work of pulling out and soldering becomes difficult, and automation of production becomes difficult.

【０００７】また、三層絶縁電線は、比較的幅の狭い引
出し線ガイド溝３に約半周巻き付けるとともに、ほぼ直
角に折り曲げて引出し溝５ｂからコイルボビン５の巻枠
部に導く不自然な巻回状態となるので、生産性が低下す
る。さらに、上記トランスでは、所要の空間・沿面距離
Ｄを確保するために、巻線を巻き付ける用途とは無関係
な引出し線ガイド溝３を形成しているので、所定の巻数
の巻線を巻くよう設定した場合に、コイルボビン５の軸
心方向（図６の上下方向）および径方向（図６の左右方
向）の寸法が大きくなり、小型化を目的とする高周波電
源用のトランスとして適したものにならない。The three-layer insulated wire is wound around the lead wire guide groove 3 having a relatively narrow width for about half a turn, and is bent at a substantially right angle to guide it from the lead groove 5b to the winding frame of the coil bobbin 5 in an unnatural winding state. Therefore, the productivity is reduced. Further, in the above-mentioned transformer, in order to secure the required space and creepage distance D, the lead wire guide groove 3 which is unrelated to the purpose of winding the winding is formed, so it is set to wind a predetermined number of windings. In this case, the dimensions of the coil bobbin 5 in the axial direction (vertical direction in FIG. 6) and the radial direction (horizontal direction in FIG. 6) become large, and the coil bobbin 5 is not suitable as a transformer for a high-frequency power source for downsizing. .

【０００８】そこで、本発明は、巻線間に安全規格を満
足する空間・沿面距離を確保しながらも、巻線間に電気
的短絡といったトラブルが発生することがなく、生産性
の向上および小型化を達成できる構成を備えたトランス
を提供することを目的とするものである。In view of the above, the present invention is capable of improving productivity and reducing the size while ensuring a space and a creepage distance that satisfy safety standards between windings, without causing a trouble such as an electrical short circuit between the windings. It is an object of the present invention to provide a transformer having a configuration capable of achieving high efficiency.

【０００９】[0009]

【課題を解決するための手段】上記目的を達成するため
に、第１の発明は、一次巻線と二次巻線の少なくとも一
方が、複数層の絶縁被覆を施した重絶縁電線で形成さ
れ、コアに取り付けられたボビンに、前記一次巻線と二
次巻線がボビンの径方向に重ねて巻かれたトランスにお
いて、前記ボビンに、主巻枠部と補助巻枠部とが中間つ
ば部を介在してボビンの軸心方向に並設され、前記補助
巻枠部のつば部に、前記ボビンにおける径方向で相対向
する第１と第２の側部に位置して、それぞれ一次巻線用
と二次巻線用の端子ピンが配設され、前記中間つば部
に、前記径方向で相対向する第３と第４の側部の少なく
とも一方に位置して、前記中間つば部の端部から底部に
向かって進入し、かつ前記第３または第４の側部の幅に
対し１／４以上で３／４以下の幅を有する挿通溝が形成
され、前記重絶縁電線からなる巻線の接続用の引出し部
が、前記主巻枠部から前記挿通溝および前記補助巻枠部
を経て前記端子ピンに半田付けにより接続され、前記主
巻枠部に前記一次巻線と二次巻線が巻かれるとともに、
前記補助巻枠部に、前記各巻線のうち、前記重絶縁電線
からなる巻線の一部または他の巻線が巻かれている。In order to achieve the above object, the first invention is that at least one of the primary winding and the secondary winding is formed of a heavy insulated wire having a plurality of layers of insulation coating. In a transformer in which the primary winding and the secondary winding are wound around a bobbin attached to a core in the radial direction of the bobbin, the bobbin has a main bobbin part and an auxiliary bobbin part which is an intermediate brim part. Are provided side by side in the axial direction of the bobbin, and are located on the flange portion of the auxiliary winding frame portion on the first and second side portions of the bobbin which are opposed to each other in the radial direction. And secondary winding terminal pins are provided, and the end of the intermediate flange portion is located at the intermediate flange portion on at least one of third and fourth side portions facing each other in the radial direction. From the portion toward the bottom and at least 1/4 of the width of the third or fourth side portion is 3 / An insertion groove having the following width is formed, and a lead-out portion for connecting a winding made of the heavy insulated wire is soldered to the terminal pin from the main winding frame portion through the insertion groove and the auxiliary winding frame portion. And the primary winding and the secondary winding are wound around the main winding frame part,
Of the windings, a part of the windings made of the heavy insulated wire or another winding is wound around the auxiliary winding portion.

【００１０】この第１の発明では、補助巻枠部のつば部
に、ボビンの径方向で相対向する第１と第２の側部に位
置する端子ピンが設けられた縦型トランスにおいて、一
次巻線と二次巻線の少なくとも一方が、複数層、例えば
三層の絶縁被覆層を施した三層絶縁電線で形成されてい
るから、この三層の絶縁被覆層により一次巻線と二次巻
線による各コイル巻層間の空間・沿面距離が確保され
る。一方、三層絶縁電線からなる重絶縁電線は、挿通溝
を通ってボビンの第３または第４の側部から第１または
第２の側部に回り込んだうえで、端子ピンに半田付けで
接続される。したがって、端子ピンに接続された重絶縁
電線の引出し部における熱劣化していない先端部から他
方の巻線までの空間・沿面距離は、補助巻枠部の軸心方
向の長さに加えてボビンの第１または第２の側部から第
３または第４の側部に回り込んだ分だけ長くなり、安全
規格を十分確保できる長さとなる。According to the first aspect of the present invention, in the vertical transformer in which the flange portion of the auxiliary winding frame is provided with the terminal pins located on the first and second side portions facing each other in the radial direction of the bobbin, Since at least one of the winding and the secondary winding is formed of a three-layer insulated wire having a plurality of layers, for example, three layers of insulating coating, the primary winding and the secondary winding are formed by the three layers of insulating coating. The space and creepage distance between each coil winding layer are secured by the winding. On the other hand, a heavy-insulated wire consisting of a three-layer insulated wire can be soldered to a terminal pin after wrapping around the bobbin from the third or fourth side to the first or second side through the insertion groove. Connected. Therefore, the space and creepage distance from the tip of the heavy insulated wire connected to the terminal pin to the other winding, which is not thermally deteriorated, must be the bobbin in addition to the axial length of the auxiliary reel. The length becomes longer as much as it wraps around from the first or second side part to the third or fourth side part, and the length can sufficiently secure the safety standard.

【００１１】しかも、ボビンの第３または第４の側部の
幅に対し１／４以上で３／４以下の比較的大きな幅を有
する挿通溝を有しているため、重絶縁電線からなる巻線
は、僅かに曲げるだけで斜めに挿通溝を通過させること
ができるから、補助巻枠部での巻き付け方向にほぼ沿っ
て主巻枠部に向かい連続的に巻き付けできる。それによ
り、重絶縁電線は、挿通溝の角部への接触によるストレ
スが殆どなく、巻き付け時に絶縁被覆層が剥がれるおそ
れが殆どない。また、挿通溝には重絶縁電線が通される
だけであるから、混線状態が生じないうえに、絶縁被覆
層が剥がれるおそれがないので、挿通溝内での両巻線間
の電気的短絡といったトラブルが発生することがない。Moreover, since the bobbin has an insertion groove having a relatively large width of 1/4 or more and 3/4 or less with respect to the width of the third or fourth side portion of the bobbin, the winding is made of a heavy insulated wire. Since the wire can pass through the insertion groove diagonally by slightly bending, the wire can be continuously wound toward the main winding frame substantially along the winding direction of the auxiliary winding frame. As a result, the heavy insulated wire has almost no stress due to contact with the corners of the insertion groove, and there is almost no risk of the insulating coating layer peeling off during winding. In addition, since the heavy insulated wire is only passed through the insertion groove, there is no possibility of cross-linking and there is no risk of the insulating coating layer peeling off, so there is an electrical short between both windings in the insertion groove. No trouble will occur.

【００１２】さらに、重絶縁電線を補助巻枠部から挿通
溝を通って主巻枠部にスムーズに巻き付けできること
と、挿通溝には重絶縁電線が通されるだけであって混線
状態が生じないことから、引出しおよび半田付け作業が
容易になることとにより、生産性を高めることができ
る。また、重絶縁電線からなる巻線の一部またはベース
巻線などの他の巻線を巻き付けるための補助巻線部を利
用して安全規格に規定された所要の空間・沿面距離を確
保するようになっており、本来の用途である巻線の巻き
付けとは無関係の引出し線ガイド溝を利用して所要の空
間・沿面距離を確保する従来トランスに比較して、同じ
巻数の巻線を巻くよう設定した場合に、ボビンの形状が
小さくなり、小型化を要求される高周波電源用のトラン
スとして適したものとなる。Furthermore, the heavy insulated wire can be smoothly wound around the main winding frame portion from the auxiliary winding frame through the insertion groove, and the heavy insulated wire is merely passed through the insertion groove without causing a mixed wire condition. Therefore, the productivity can be improved by facilitating the drawing and soldering work. Also, use a part of the winding consisting of heavy insulated wires or an auxiliary winding part for winding other winding such as base winding to ensure the required space and creepage distance specified in the safety standard. Therefore, use the same number of turns as the conventional transformer, which uses lead wire guide grooves that are unrelated to the winding of the winding wire, which is the original application, to secure the required space and creepage distance. When set, the size of the bobbin becomes small, which makes it suitable as a transformer for a high-frequency power source that requires miniaturization.

【００１３】また、第２の発明は、一次巻線と二次巻線
の少なくとも一方が、複数層の絶縁被覆を施した重絶縁
電線で形成され、コアに取り付けられたボビンに、前記
一次巻線と二次巻線がボビンの径方向に重ねて巻かれた
トランスにおいて、前記ボビンに、主巻枠部と補助巻枠
部とが中間つば部を介在してボビンの軸心方向に並設さ
れ、前記主巻枠部のつば部と補助巻枠部のつば部のそれ
ぞれに、前記ボビンにおける第１の側部に位置して、一
次巻線用と二次巻線用の端子ピンが配設され、前記中間
つば部に、前記径方向で前記第１の側部に対向する第２
の側部、および径方向で相対向する第３と第４の側部の
うち、少なくとも１つの側部に位置して、前記中間つば
部の端部から底部に向かって進入し、かつ前記側部の幅
に対し１／４以上で３／４以下の幅を有する挿通溝が形
成され、前記重絶縁電線からなる巻線の接続用の引出し
部が、前記主巻枠部から前記挿通溝および前記補助巻枠
部を経て前記端子ピンに半田付けにより接続され、前記
主巻枠部に前記一次巻線と二次巻線が巻かれるととも
に、前記補助巻枠部に、前記各巻線のうち、前記重絶縁
電線からなる巻線の一部または他の巻線が巻かれてい
る。According to a second aspect of the present invention, at least one of the primary winding and the secondary winding is formed of a heavy insulated wire having a plurality of layers of insulating coating, and the primary winding is attached to a bobbin attached to a core. In a transformer in which a wire and a secondary winding are wound in the radial direction of a bobbin, the main bobbin part and the auxiliary bobbin part are arranged side by side in the axial direction of the bobbin with an intermediate flange part interposed therebetween. Terminal pins for the primary winding and the secondary winding, which are located on the first side portion of the bobbin, are arranged on the brim portion of the main bobbin portion and the brim portion of the auxiliary bobbin portion, respectively. A second member that is provided on the intermediate collar portion and faces the first side portion in the radial direction.
Of at least one of the third and fourth side portions that face each other in the radial direction, enter from the end of the intermediate flange portion toward the bottom, and An insertion groove having a width of 1/4 or more and 3/4 or less with respect to the width of the portion is formed, and a lead-out portion for connecting a winding made of the heavy insulated wire is formed from the main winding frame portion to the insertion groove and Soldered to the terminal pins through the auxiliary winding part, the primary winding and the secondary winding are wound around the main winding part, and the auxiliary winding part, among the windings, A part of the winding made of the heavy insulated wire or another winding is wound.

【００１４】この第２の発明は、主巻枠部のつば部と補
助巻枠部のつば部のそれぞれに、ボビンの特定の側部に
位置する端子ピンが設けられた横型トランスにおいて、
第１発明と同様に、安全規格を十分確保できる長さの空
間・沿面距離を形成できる構成としながらも、重絶縁電
線の絶縁被覆層が剥がれるおそれがなく、かつ混線状態
が生じないことより、一次および二次の両巻線間の電気
的短絡といったトラブルが発生することがなく、さら
に、生産性の向上とボビンの小型化といった効果を得る
ことができる。The second aspect of the present invention is a horizontal transformer in which a terminal pin located on a specific side of a bobbin is provided on each of the flange portion of the main winding frame portion and the flange portion of the auxiliary winding frame portion.
As with the first invention, even though the space and the creepage distance are sufficiently long to ensure safety standards, the insulating coating layer of the heavy insulated wire is not likely to be peeled off, and the mixed wire state does not occur. Trouble such as electrical short circuit between the primary and secondary windings does not occur, and further, effects such as improvement in productivity and miniaturization of bobbin can be obtained.

【００１５】さらに、第３の発明は、一次巻線と二次巻
線の少なくとも一方が、複数層の絶縁被覆を施した重絶
縁電線で形成され、コアに取り付けられたボビンに、前
記一次巻線と二次巻線がボビンの径方向に重ねて巻かれ
たトランスにおいて、ボビン本体の外周面が円形となっ
た前記ボビンに、主巻枠部と補助巻枠部とが中間つば部
を介在してボビンの軸心方向に並設され、前記補助巻枠
部のつば部に、前記ボビンにおける径方向で相対向する
第１と第２の側部に位置して、それぞれ一次巻線用と二
次巻線用の端子ピンが配設され、前記中間つば部に、前
記径方向で相対向する第３と第４の側部の少なくとも一
方に位置して、前記中間つば部の端部から底部に向かっ
て進入し、かつ一方の前記端子ピンの配列方向にほぼ直
角に位置する第１カット面とこの第１カット面に対して
ボビン本体の軸心回りに３０°以上で９０°以下の角度
だけ離れた第２カット面とによりほぼＶ字形状となった
挿通溝が形成され、前記重絶縁電線からなる巻線の接続
用の引出し部が、前記主巻枠部から前記挿通溝および前
記補助巻枠部を経て一方の前記端子ピンに半田付けによ
り接続され、前記主巻枠部に前記一次巻線と二次巻線が
巻かれるとともに、前記補助巻枠部に、前記各巻線のう
ち、前記端子ピンに接続された重絶縁電線からなる巻線
の一部または他の巻線が巻かれている。Further, according to a third aspect of the present invention, at least one of the primary winding and the secondary winding is formed of a heavy insulated electric wire having a plurality of layers of insulating coating, and the primary winding is attached to a bobbin attached to a core. In a transformer in which a wire and a secondary winding are wound in the radial direction of a bobbin, a main bobbin part and an auxiliary bobbin part have an intermediate brim part in the bobbin whose outer peripheral surface of the bobbin body is circular. And are arranged side by side in the axial direction of the bobbin, and are located on the flange portion of the auxiliary winding frame portion on the first and second side portions of the bobbin that face each other in the radial direction. A terminal pin for a secondary winding is provided, and is located on at least one of the third and fourth side portions that face each other in the radial direction in the intermediate flange portion, and from the end portion of the intermediate flange portion. A first part which is directed toward the bottom part and which is positioned substantially at right angles to the arrangement direction of the one terminal pin; The V-shaped insertion groove is formed by the first cut surface and the second cut surface that is separated from the first cut surface by an angle of 30 ° or more and 90 ° or less around the axis of the bobbin body, A lead-out portion for connecting a winding formed of the heavy insulated wire is connected to the one terminal pin by soldering from the main winding frame portion through the insertion groove and the auxiliary winding frame portion, and the main winding frame portion The primary winding and the secondary winding are wound on the auxiliary winding frame part, and among the windings, a part of the winding formed of a heavy insulated wire connected to the terminal pin or another winding. Is wound.

【００１６】この第３の発明は、第１の発明と同等の効
果を得られるのに加えて、ボビンのボビン本体の外周面
が円形になっているので、巻線を円滑に巻き付けられる
利点がある。また、第１の発明のトランスの挿通溝と同
等の機能を得られる挿通溝を、ボビン本体の円形の外周
面に支障なく一体形成できる形状を有しており、ボビン
を、第１の発明のボビンを樹脂成形するための金型と同
じ割り数の金型で樹脂成形できる。In addition to obtaining the same effect as in the first aspect of the invention, the third aspect of the invention has the advantage that the bobbin main body of the bobbin has a circular outer peripheral surface so that the winding can be wound smoothly. is there. Further, the bobbin of the first aspect of the present invention has a shape in which an insertion groove that can achieve the same function as the insertion groove of the transformer of the first aspect of the invention can be integrally formed on the circular outer peripheral surface of the bobbin body without any trouble. The bobbin can be resin-molded with the same number of molds as the resin mold.

【００１７】[0017]

【発明の実施の形態】以下、本発明の好適な実施形態に
ついて図面を参照しながら説明する。図１は本発明の第
１実施形態に係る縦型のトランスを示す縦断面図で、図
２はそのボビンを示す斜視図である。これらの図におい
て、ボビン１０は、巻線が巻かれる芯となる角筒形のボ
ビン本体１０ａと、その両端のつば部１５，１９と、中
間つば部１４とが一体成形された構成になっており、ボ
ビン本体１０ａにはコア６の挿通孔１３が形成されてい
る。このボビン１０は、つば部１９と中間つば部１４と
の間に主巻枠部１１が形成されているとともに、中間つ
ば部１４とつば部１５との間に主巻枠部１１よりも軸心
方向の長さが短い補助巻枠部１２が形成されている。DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical sectional view showing a vertical transformer according to a first embodiment of the present invention, and FIG. 2 is a perspective view showing the bobbin. In these drawings, the bobbin 10 has a structure in which a rectangular tube-shaped bobbin main body 10a serving as a core around which a winding is wound, collar portions 15 and 19 at both ends thereof, and an intermediate collar portion 14 are integrally molded. An insertion hole 13 for the core 6 is formed in the bobbin main body 10a. The bobbin 10 has a main winding frame portion 11 formed between a collar portion 19 and an intermediate collar portion 14, and an axial center of the bobbin 10 between the intermediate collar portion 14 and the collar portion 15 rather than the main winding frame portion 11. An auxiliary reel portion 12 having a short length in the direction is formed.

【００１８】また、中間つば部１４には、ボビン１０に
おける第１の側部Ｆ１に対しその両方へ周方向に９０°
ずれてボビン１０の径方向で相対向する第３および第４
の側部Ｆ３，Ｆ４のそれぞれに位置して、その端部から
底部に向かって進入する第１の挿通溝１４ａが形成され
ているとともに、第１の側部Ｆ１に対しボビン１０の径
方向で相対向する第２の側部Ｆ２に位置して、第２の挿
通溝１４ｂが形成されている。図２に示す第１の挿通溝
１４ａの幅Ｗ１は，第３，第４の側部Ｆ３，Ｆ４におけ
るボビン本体１０ａの幅Ｗ２の１／２程度の幅になって
いる。挿通溝１４ａの幅Ｗ１はボビン本体１０ａの幅Ｗ
２の１／４以上で３／４以下が好ましく、１／４以上で
２／３以下がより好ましく、１／３以上で２／３以下が
さらに好ましい。また、第１の挿通溝１４ａは、第１の
側部Ｆ１よりも第２の側部Ｆ２寄りに位置する方が好ま
しい。Further, the intermediate flange portion 14 is circumferentially 90 ° to both sides of the first side portion F1 of the bobbin 10.
Third and fourth, which are displaced and face each other in the radial direction of the bobbin 10.
Is formed on each of the side portions F3, F4 of the bobbin 10 in the radial direction of the bobbin 10 with respect to the first side portion F1. The second insertion groove 14b is formed at the second side portion F2 facing each other. The width W1 of the first insertion groove 14a shown in FIG. 2 is about 1/2 of the width W2 of the bobbin body 10a on the third and fourth side portions F3, F4. The width W1 of the insertion groove 14a is the width W of the bobbin main body 10a.
It is preferably 1/4 or more of 2 and 3/4 or less, more preferably 1/4 or more and 2/3 or less, still more preferably 1/3 or more and 2/3 or less. Further, it is preferable that the first insertion groove 14a is located closer to the second side portion F2 than the first side portion F1.

【００１９】補助巻枠部１２のつば部１５には、第１と
第２の側部にＦ１，Ｆ２に位置して、それぞれ複数個の
引出し溝１５ａが形成されているとともに、このつば部
１５における引出し溝１５ａが形成されている二つの端
面に、複数個の引出し溝１５ｂが形成されている。さら
に、補助巻枠部１２のつば部１５には、第１と第２の側
部Ｆ１，Ｆ２に位置して、所要本数の一次側と二次側の
端子ピン８Ａ，８Ｂがその突出した脚部をボビン１０の
軸心方向に向けた状態でインサート成形により配設され
ている。前記端子ピン８Ａ，８Ｂの脚部が配線基板５０
に差し込まれる。これにより、コア６が配線基板５０に
垂直になる（縦型トランス）。The collar portion 15 of the auxiliary winding frame portion 12 is formed with a plurality of lead-out grooves 15a located at F1 and F2 on the first and second side portions, and the collar portion 15 is formed. A plurality of lead-out grooves 15b are formed on the two end faces in which the lead-out groove 15a is formed. Further, the flange portion 15 of the auxiliary winding frame portion 12 is located at the first and second side portions F1 and F2, and the required number of primary and secondary side terminal pins 8A and 8B are protruded from the legs. The parts are arranged by insert molding with the parts thereof oriented in the axial direction of the bobbin 10. The leg portions of the terminal pins 8A and 8B are the wiring board 50.
Plugged in. As a result, the core 6 becomes vertical to the wiring board 50 (vertical transformer).

【００２０】この実施形態ではスイッチング電源装置用
の縦型トランスを例示してある。図１では、一次巻線１
６、二次巻線１７およびベース巻線１８の各々につい
て、便宜上、それらのコイル巻層ごとに区分した符号を
付してある。ボビン１０の主巻枠部１１には、一次巻線
１６Ａ，１６Ｂの大部分と二次巻線１７Ａ、１７Ｂの全
部とがボビン１０の径方向に重ねて巻かれているととも
に、ボビン１０の補助巻枠部１２には、スイッチング素
子駆動用のベース巻線１８（他の巻線の一種）と、一次
巻線１６Ａ，１６Ｂの各一部とがボビン１０の径方向に
重ねて巻かれている。これら一次巻線１６Ａ，１６Ｂ、
二次巻線１７Ａ、１７Ｂおよびベース巻線１８は、図３
に示すように、コア６を介して磁気結合されている。In this embodiment, a vertical transformer for a switching power supply device is exemplified. In FIG. 1, the primary winding 1
6, each of the secondary winding 17 and the base winding 18 is provided with a reference numeral for each coil winding layer for convenience. Most of the primary windings 16A and 16B and all of the secondary windings 17A and 17B are wound around the main bobbin portion 11 of the bobbin 10 in the radial direction of the bobbin 10, and the bobbin 10 is assisted. A base winding 18 (a type of other winding) for driving a switching element and a part of each of the primary windings 16A and 16B are wound around the bobbin 10 in the radial direction of the bobbin 10. . These primary windings 16A, 16B,
The secondary windings 17A, 17B and the base winding 18 are shown in FIG.
As shown in FIG. 5, magnetic coupling is provided through the core 6.

【００２１】図１の主巻枠部１１の１層目と４層目のコ
イル巻層を形成する一次巻線１６Ａ，１６Ｂおよび補助
巻枠部１２の１層目のコイル巻層を形成するベース巻線
１８は、それぞれ三層絶縁電線のような重絶縁電線によ
り形成されている。上記三層絶縁電線は、例えば下２層
に変性ポリエステル、上１層にポリアミドの各被覆を電
線の表面に施したものである。主巻枠部１１の２層目と
３層目のコイル巻層を形成する二次巻線１７Ａ，１７Ｂ
は、通常のエナメルコーティング電線のような軽絶縁電
線で形成されている。一方、隣接する各コイル巻層間
は、既存の絶縁テープ４で電気絶縁されている。この絶
縁テープ４は、各巻線１６Ａ、１６Ｂ、１７Ａ，１７
Ｂ，１８に対して、その巻き乱れを防止するとともに、
ボビン１０の径方向内方に加えられる力に抗して機械的
に保護している。Primary windings 16A, 16B forming the first and fourth coil winding layers of the main winding frame 11 and the base forming the first coil winding layer of the auxiliary winding frame 12 of FIG. The windings 18 are each formed of a heavy insulated wire such as a three-layer insulated wire. The above-mentioned three-layer insulated wire has, for example, a modified polyester as the lower two layers and a polyamide as the upper one layer coated on the surface of the electrical wire. Secondary windings 17A and 17B forming the second and third coil winding layers of the main winding frame 11
Is made of light insulated wire such as ordinary enamel coated wire. On the other hand, the adjacent coil winding layers are electrically insulated by the existing insulating tape 4. This insulating tape 4 is used for each winding 16A, 16B, 17A, 17
For B and 18, while preventing the winding disorder,
Mechanical protection is provided against the force applied radially inward of the bobbin 10.

【００２２】重絶縁電線からなる一次巻線１６は、図２
に実線で示すように、一方の引出し部１６ａが第１の側
部Ｆ１にある一次側の端子ピン８Ａに半田Ｈ付けされ、
この端子ピン８Ａからつば部１５の引出し溝１５ａを通
って、矢印方向に補助巻枠部１２に巻かれたのち、また
は巻かれないで補助巻枠部１２を通過したのち、第３の
側部Ｆ３にある第１の挿通溝１４ａを通って主巻枠部１
１に巻かれる。一次巻線１６はつづいて、第４の側部Ｆ
４にある第１の挿通溝１４ａを通り、補助巻枠部１２を
通過し、別の引出し溝１５ａを通って、他方の引出し部
１６ｂ（図１）が別の一次側の端子ピン８Ａに半田Ｈ付
けされている。The primary winding 16 made of heavy insulated wire is shown in FIG.
As shown by the solid line, one of the lead-out portions 16a is soldered to the primary side terminal pin 8A on the first side portion F1 by solder H,
The terminal pin 8A passes through the pull-out groove 15a of the flange portion 15 and is wound around the auxiliary winding frame portion 12 in the arrow direction, or after passing through the auxiliary winding frame portion 12 without being wound, the third side portion The main reel part 1 passes through the first insertion groove 14a in F3.
Wrapped in 1. The primary winding 16 is then followed by the fourth side F
4 through the first insertion groove 14a, the auxiliary winding frame portion 12 and another lead-out groove 15a, and the other lead-out portion 16b (FIG. 1) is soldered to another primary-side terminal pin 8A. H is attached.

【００２３】他方、軽絶縁電線からなる二次巻線１７
は、図２に一点鎖線で示すように、一方の引出し部１７
ａが第２の側部Ｆ２にある二次側の端子ピン８Ｂに半田
Ｈ付けされ、この端子ピン８Ｂからつば部１５の引出し
溝１５ａを通って補助巻枠部１２を通過したのち、第２
の側部Ｆ２にある第２の挿通溝１４ｂを通って主巻枠部
１１に巻かれる。ついで、二次巻線１７は、再び第２の
挿通溝１４ｂを通り、補助巻枠部１２を通過して、他方
の引出し部１７ｂ（図１）が別の二次側の端子ピン８Ｂ
に半田付けされる。ここで、一次巻線１６は重絶縁電線
なので、絶縁性は高いから、二次巻線１７の引出し部１
７ａ，１７ｂと一次巻線１６間の絶縁距離を大きくとる
必要はない。さらに、ベース巻線１８は、補助巻枠部１
２における巻線端からの引出し部１８ａが引出し溝１５
ａを介して一次側の端子ピン８Ａまで引き出されたのち
に、半田Ｈ付けにより端子ピン８Ａに接続されている。On the other hand, the secondary winding 17 composed of a light insulated wire
As shown by the alternate long and short dash line in FIG.
a is soldered to the secondary side terminal pin 8B on the second side portion F2 by solder H, passes through the auxiliary winding frame portion 12 from the terminal pin 8B through the lead-out groove 15a of the collar portion 15, and then
It is wound around the main winding frame 11 through the second insertion groove 14b in the side portion F2 of the. Then, the secondary winding 17 passes through the second insertion groove 14b again and the auxiliary winding frame portion 12, and the other lead-out portion 17b (FIG. 1) is attached to another secondary side terminal pin 8B.
Soldered. Here, since the primary winding 16 is a heavy insulated wire, it has a high insulation property.
It is not necessary to increase the insulation distance between the primary winding 16 and 7a, 17b. Further, the base winding 18 is provided in the auxiliary winding frame portion 1
In FIG. 2, the lead-out portion 18a from the winding end is the lead-out groove 15
After being pulled out to the terminal pin 8A on the primary side via a, it is connected to the terminal pin 8A by soldering H.

【００２４】上記トランスは、重絶縁電線からなる一次
巻線１６Ａ，１６Ｂの三層の絶縁被覆層により互いに隣
接する一次巻線１６Ａ，１６Ｂと二次巻線１７Ａ，１７
Ｂによる各コイル巻層間の空間・沿面距離が十分に確保
されている。一方、重絶縁電線からなる一次巻線１６
Ａ，１６Ｂの端部は、半田Ｈ付けによって、絶縁被覆層
の図１に平行横線Ｓ１で示す部分が熱劣化で絶縁性が低
下するが、この一次巻線１６Ａ，１６Ｂの引出し部１６
ａ，１６ｂにおける熱劣化していない先端部Ｓ２から隣
接する二次巻線１７Ａ，１７Ｂの主巻枠部１１における
巻端部Ｓ３までの空間・沿面距離Ｄ１は、図２に図示す
る長さとなり、安全規格に規定された長さを十分有して
いる。In the above transformer, the primary windings 16A and 16B and the secondary windings 17A and 17 which are adjacent to each other by the three layers of the insulating coating layers of the primary windings 16A and 16B made of heavy insulated wires.
A sufficient space and creepage distance between the coil winding layers by B are secured. On the other hand, the primary winding 16 consisting of heavy insulated wire
At the end portions of A and 16B, the solder H is applied to the portion of the insulating coating layer indicated by the parallel horizontal line S1 in FIG.
The space / creeping distance D1 from the tip portion S2 of the a, 16b which has not been thermally deteriorated to the winding end portion S3 of the main winding frame portion 11 of the adjacent secondary windings 17A, 17B is the length shown in FIG. , Has a sufficient length stipulated in the safety standard.

【００２５】すなわち、上記トランスは、中間つば部１
４の第３と第４の側部Ｆ３，Ｆ４にそれぞれ位置する第
１の挿通溝１４ａが形成されているから、主巻枠部１１
に巻かれた一次巻線１６は、第１の挿通溝１４ａを通っ
て第３または第４の側部Ｆ３，Ｆ４から第１または第２
の側部Ｆ１，Ｆ２に回り込んだうえで、第１の側部Ｆ１
にある一次側の端子ピン８Ａに半田Ｈ付けで接続され
る。したがって、この場合の空間・沿面距離Ｄ１は、図
１の端子ピン８Ａに接続された引出し部１６ａ，１６ｂ
における熱劣化していない先端部Ｓ２から、主巻枠部１
１に巻かれた二次巻線１７における第１の挿通溝１４ａ
で露出する巻端部Ｓ３までの距離となる。この空間・沿
面距離Ｄ１は、一次巻線１６を軸心方向に沿って補助巻
枠部１２を通過させて引き出す場合に比較して、第１の
側部Ｆ１から第３または第４の側部Ｆ３，Ｆ４に回り込
む分だけ、大幅に長くなる。その結果、安全規格をより
一層十分に確保できる。That is, the above-mentioned transformer has the intermediate brim portion 1
Since the first insertion groove 14a located at each of the third and fourth side portions F3 and F4 of No. 4 is formed, the main winding frame portion 11
The primary winding 16 wound on the first winding groove 14a passes through the first insertion groove 14a and then the first or second side portion F3, F4.
Of the first side portion F1 after wrapping around the side portions F1 and F2 of the
Is connected to the primary-side terminal pin 8A in the solder H. Therefore, the space / creeping distance D1 in this case is the same as that of the lead-out portions 16a and 16b connected to the terminal pin 8A of FIG.
From the tip portion S2 not thermally deteriorated in the main reel portion 1
First insertion groove 14a in the secondary winding 17 wound around
It is the distance to the winding end S3 exposed at. This space / creeping distance D1 is from the first side part F1 to the third or fourth side part as compared with the case where the primary winding 16 is pulled out by passing through the auxiliary winding frame part 12 along the axial direction. It will be much longer as it goes around F3 and F4. As a result, the safety standard can be more sufficiently secured.

【００２６】また、第１の挿通溝１４ａは、第３または
第４の側部Ｆ３，Ｆ４における第２の側部Ｆ２寄りの部
位に位置しているとともに、第３，第４の側部Ｆ３，Ｆ
４におけるボビン本体１０ａの幅Ｗ２のほぼ半分にも及
ぶ大きな幅Ｗ１に形成されている。そのため、重絶縁電
線からなる一次巻線１６は、僅かに曲げるだけで斜めに
第１の挿通溝１４ａを通過させることができるから、補
助巻枠部１２での巻き付け方向にほぼ沿って主巻枠部１
１に向かい連続的に巻き付けできる。それにより、一次
巻線１６の中間つば部１４およびボビン本体１０ａとの
接触によるストレスが殆どなくなり、一次巻線１６の絶
縁被覆層の安全性が高まる。したがって、図１と図６と
の比較から明らかなように、従来のトランスのように重
絶縁電線のほぼ直角に折り曲げられた部位が中間つば部
１４の角部でこすれて絶縁被覆層が剥がれ、重絶縁電線
の絶縁破壊によって両巻線１６，１７が電気的に短絡す
るといったトラブルは生じない。また、一次巻線１６を
補助巻枠部１２から第１の挿通溝１４ａを通って主巻枠
部１１にスムーズに巻き付けできるので、生産性を高め
ることもできる。Further, the first insertion groove 14a is located at a portion of the third or fourth side portion F3, F4 close to the second side portion F2, and at the same time, the third and fourth side portion F3. , F
The width W1 of the bobbin main body 10a in FIG. Therefore, the primary winding 16 made of a heavy insulated wire can be passed through the first insertion groove 14a obliquely by slightly bending it. Therefore, the primary winding 16 can be passed along the winding direction of the auxiliary winding frame portion 12 substantially along the main winding frame. Part 1
It can be wound continuously toward 1. As a result, the stress caused by the contact between the intermediate flange portion 14 of the primary winding 16 and the bobbin body 10a is almost eliminated, and the safety of the insulating coating layer of the primary winding 16 is enhanced. Therefore, as is clear from the comparison between FIG. 1 and FIG. 6, the portion of the heavy insulated wire that is bent at a substantially right angle as in the conventional transformer is rubbed at the corner of the intermediate flange portion 14, and the insulating coating layer is peeled off. There is no problem that both windings 16 and 17 are electrically short-circuited due to insulation breakdown of the heavy insulated wire. Further, since the primary winding 16 can be smoothly wound around the main winding frame 11 from the auxiliary winding frame 12 through the first insertion groove 14a, the productivity can be improved.

【００２７】しかも、第１の挿通溝１４ａが大きな幅Ｗ
１に設定されているとともに、一次巻線１６を第１の挿
通溝１４ａに通し、二次巻線１７を第２の挿通溝１４ｂ
に通しているから、多出力仕様となって巻線の数が多く
なっても、図６の従来トランスのように単一の引出し溝
５ｂに両方の巻線１，２を通す場合と異なり、混線状態
が発生せず、かつ各挿通溝１４ａ，１４ｂに巻線が集中
することによる巻き太りや巻き乱れが生じないので、引
き出しおよび半田付け作業が容易になるともに、重絶縁
電線の絶縁被覆層の劣化による両巻線１６，１７間の電
気的短絡の発生をより確実に防止できる。Moreover, the width W of the first insertion groove 14a is large.
1, the primary winding 16 is passed through the first insertion groove 14a, and the secondary winding 17 is passed through the second insertion groove 14b.
Therefore, even when the number of windings is increased due to the multi-output specification, unlike the case where both the windings 1 and 2 are passed through the single extraction groove 5b as in the conventional transformer of FIG. 6, Since a mixed wire state does not occur and winding thickening and winding disorder due to windings concentrated in the insertion grooves 14a and 14b do not occur, extraction and soldering work are facilitated, and an insulating coating layer for heavy insulated wires is provided. It is possible to more reliably prevent the occurrence of an electrical short circuit between the windings 16 and 17 due to the deterioration of the.

【００２８】また、この実施形態では、主巻枠部１１に
重ねて巻かれる一次巻線１６Ａ，１６Ｂまたは二次巻線
１７Ａ，１７Ｂのうちの、重絶縁電線で形成された方の
巻線の一部を、補助巻枠部１２に巻くことにより、ボビ
ン１０における一次巻線１６Ａ，１６Ｂの一部とベース
巻線１８を巻くための補助巻線部１２を利用して安全規
格に規定された所要の空間・沿面距離Ｄ１を確保するよ
うになっている。これに対し、図６に示す従来トランス
のボビンでは、巻線の巻き付けとは無関係な用途に用い
る引出し線ガイド溝３を形成して所要の空間・沿面距離
Ｄを確保している。したがって、図１と図６との比較か
ら明らかなように、第１実施形態のトランスのボビン１
０は、図６と同じ巻数の巻線を巻くよう設定した場合に
上下方向（軸心方向）および左右方向（径方向）の寸法
が図６のボビンよりも小さくなり、小型化を要求される
高周波電源用のトランスとして適したものとなる。Further, in this embodiment, one of the primary windings 16A and 16B or the secondary windings 17A and 17B wound on the main winding frame portion 11 in a superposed manner is one of the windings formed of the heavy insulated wire. By winding a part of the auxiliary winding part 12 on the auxiliary winding part 12, a part of the primary windings 16A and 16B of the bobbin 10 and the auxiliary winding part 12 for winding the base winding 18 are used to define the safety standard. The required space / creeping distance D1 is secured. On the other hand, in the bobbin of the conventional transformer shown in FIG. 6, the lead wire guide groove 3 used for purposes unrelated to winding of the winding wire is formed to secure a required space / creep distance D. Therefore, as is clear from the comparison between FIG. 1 and FIG. 6, the bobbin 1 of the transformer of the first embodiment is
When 0 is set to wind the same number of turns as in FIG. 6, the size in the vertical direction (axial direction) and the horizontal direction (radial direction) is smaller than that of the bobbin in FIG. 6, and downsizing is required. It is suitable as a transformer for high frequency power supplies.

【００２９】なお、一次巻線１６および二次巻線１７の
両方を重絶縁電線で形成すると、両巻線間の磁気的結合
を弱める結果を招いて所期の変圧性能を得られないのに
対し、この実施形態では、重絶縁電線が一次巻線１６の
みに用いられているから、一次及び二次の両巻線１６、
１７間に高い磁気的結合を得てトランスの所期の性能が
保持される。また、補助巻枠部１２にはベース巻線１８
のみを巻いて、重絶縁電線からなる一次巻線１６の全て
を主巻枠部１１に巻いた構成とすれば、巻き付け工程を
簡略化できる利点がある。When both the primary winding 16 and the secondary winding 17 are formed of heavy insulated wires, the magnetic coupling between the two windings is weakened, and the desired transformer performance cannot be obtained. On the other hand, in this embodiment, since the heavy insulated wire is used only for the primary winding 16, both the primary and secondary windings 16,
A high magnetic coupling is obtained between 17 and the desired performance of the transformer is maintained. Further, the auxiliary winding part 12 has a base winding 18
If only the primary winding 16 made of a heavy insulated wire is wound around the main winding frame portion 11 by winding only the winding, there is an advantage that the winding process can be simplified.

【００３０】図４は本発明の第２実施形態に係る横型の
トランスを示す縦断面図である。このトランスのボビン
１０の全体形状は第１実施形態のボビン１０とほぼ同様
であるが、主巻枠部１１のつば部１９にも、補助巻枠部
１２のつば部１５の引出し溝１５ａと同様の引出し溝１
９ａが形成されている。また、補助巻枠部１２のつば部
１５および主巻枠部１１のつば部１９のそれぞれの一端
面に、ボビン１０の第１の側部Ｆ１に位置して、所要本
数の一次側と二次側の端子ピン８Ａ，８Ｂが、それらの
脚部をボビン１０の径方向に向けた状態で配設されてい
る。これにより、配線基板（図示せず）に対してコア
（図示せず）が平行となる（横型トランス）。FIG. 4 is a vertical sectional view showing a horizontal transformer according to the second embodiment of the present invention. The overall shape of the bobbin 10 of this transformer is almost the same as that of the bobbin 10 of the first embodiment, but the flange portion 19 of the main bobbin portion 11 has the same drawing groove 15a as the flange portion 15 of the auxiliary bobbin portion 12. Drawout groove 1
9a are formed. Further, on one end surface of each of the flange portion 15 of the auxiliary winding frame portion 12 and the flange portion 19 of the main winding frame portion 11, the first side portion F1 of the bobbin 10 is located, and the required number of primary and secondary sides are located. The terminal pins 8A, 8B on the side are arranged with their legs directed in the radial direction of the bobbin 10. As a result, the core (not shown) becomes parallel to the wiring board (not shown) (horizontal transformer).

【００３１】中間つば部１４には、第１実施形態と同様
に、ボビン１０における第１の側部Ｆ１に対しその両方
へ周方向に９０°ずれてボビン１０の径方向で相対向す
る第３および第４の側部Ｆ３，Ｆ４のそれぞれに位置し
て、その端部から底部に向かって進入する合計２つの挿
通溝１４ａが形成されている。この挿通溝１４ａの幅と
ボビン本体１０ａの幅との好ましい関係は、図示してい
ないが、前述の第１実施例の場合と同様である。すなわ
ち、挿通溝１４ａの幅はボビン本体１０ａの第３または
第４の側部Ｆ３，Ｆ４の幅の１／４以上で３／４以下が
好ましく、１／４以上で２／３以下がより好ましく、１
／３以上で２／３以下がさらに好ましい。また、挿通溝
１４ａは、第１の側部Ｆ１よりも第２の側部Ｆ２寄りに
位置する方が好ましい。As in the case of the first embodiment, the intermediate flange portion 14 has a third side face F1 of the bobbin 10 which is circumferentially offset by 90 ° to both sides of the first side face F1 so as to face each other in the radial direction of the bobbin 10. Further, a total of two insertion grooves 14a that are located at the fourth side portions F3 and F4 and enter from the end portion toward the bottom portion are formed. Although not shown, the preferable relationship between the width of the insertion groove 14a and the width of the bobbin main body 10a is the same as that of the first embodiment. That is, the width of the insertion groove 14a is preferably ¼ or more and 3/4 or less of the width of the third or fourth side portions F3, F4 of the bobbin main body 10a, and more preferably ¼ or more and 2/3 or less. 1
It is more preferably / 3 or more and 2/3 or less. Further, the insertion groove 14a is preferably located closer to the second side portion F2 than the first side portion F1.

【００３２】重絶縁電線からなる一次巻線１６は、実線
で示すように、一方の引出し部１６ａが補助巻枠部１２
のつば部１５に設けられた一次側の端子ピン８Ａに半田
付けされ、この端子ピン８Ａからつば部１５の引出し溝
１５ａを通って補助巻枠部１２に巻かれたのち、または
巻かれないで補助巻枠部１２を通過したのち、第３の側
部Ｆ３にある挿通溝１４ａを通って主巻枠部１１に巻か
れる。つづいて、第３の側部Ｆ３または第４の側部Ｆ４
にある挿通溝１４ａを通り、補助巻枠部１２を通過し、
引出し溝１５ａを通って、他方の引出し部１６ｂが一次
側の端子ピン８Ａに半田付けされる。主巻枠部１１に巻
かれた一次巻線１６は、図示しないが、その中間部が第
３の側部Ｆ３または第４の側部Ｆ４にある挿通溝１４ａ
および補助巻枠部１２を通過して、別の一次側の端子ピ
ン８Ａに半田付けされて、中間タップ（図３参照）を形
成している。As shown by the solid line, the primary winding 16 made of a heavy insulated wire has one lead-out portion 16a which is the auxiliary winding frame portion 12.
After being soldered to the primary side terminal pin 8A provided on the collar portion 15 and wound on the auxiliary winding frame portion 12 from the terminal pin 8A through the lead-out groove 15a of the collar portion 15, or without being wound. After passing through the auxiliary reel portion 12, it is wound around the main reel portion 11 through the insertion groove 14a in the third side portion F3. Subsequently, the third side portion F3 or the fourth side portion F4
Passing through the insertion groove 14a, passing through the auxiliary winding frame portion 12,
The other lead portion 16b is soldered to the terminal pin 8A on the primary side through the lead groove 15a. Although not shown, the primary winding 16 wound around the main bobbin portion 11 has an insertion groove 14a having an intermediate portion on the third side portion F3 or the fourth side portion F4.
Also, the intermediate tap (see FIG. 3) is formed by passing through the auxiliary winding frame portion 12 and being soldered to another primary side terminal pin 8A.

【００３３】他方、軽絶縁電線からなる二次巻線１７
は、一点鎖線で示すように、一方の引出し部１７ａが主
巻枠部１２のつば部１９に設けられた二次側の端子ピン
８Ｂに半田付けされ、この端子ピン８Ｂからつば部１９
の引出し溝１９ａを通って主巻枠部１１に巻かれる。二
次巻線１７の他方の引出し部１７ｂは、別の引出し溝１
９ａを通って別の端子ピン８Ｂに半田付けされる。On the other hand, the secondary winding 17 made of light insulated wire
As shown by the alternate long and short dash line, one lead portion 17a is soldered to the secondary side terminal pin 8B provided on the collar portion 19 of the main winding frame portion 12, and the terminal pin 8B to the collar portion 19 is soldered.
It is wound around the main winding frame portion 11 through the drawing groove 19a. The other lead-out portion 17b of the secondary winding 17 is provided in another lead-out groove 1
It is soldered to another terminal pin 8B through 9a.

【００３４】したがって、この実施形態のトランスは、
主に端子ピン８Ａ，８Ｂの取付形態が異なるだけで、第
１実施形態とほぼ同様であり、一次巻線１６Ａ，１６Ｂ
と二次巻線１７Ａ，１７Ｂとの間の空間・沿面距離は、
図示していないが、第１実施形態と同様に安全規格に規
定の長さを十分有している。すなわち、端子ピン８Ａ，
８Ｂが配設された第１の側部Ｆ１と９０°ずれた第３の
側部Ｆ３および第４の側部Ｆ４に挿通溝１４ａが形成さ
れているから、重絶縁電線からなる一次巻線１６は、挿
通溝１４ａを通って第３または第４の側部から第１の側
部に回り込んだうえで、端子ピン８Ａに半田Ｈ付けで接
続される。この場合の空間・沿面距離Ｄ２は、端子ピン
８Ａに接続された引出し部１６ａ，１６ｂにおける熱劣
化していない先端部から、主巻枠１１に巻かれた二次巻
線１７が露出する各挿通溝１４ａまでの距離となる。こ
の空間・沿面距離Ｄ２は、一次巻線１６を補助巻枠部１
２の軸心方向に沿って引き出す場合と比較して、第１の
側部Ｆ１から第３の側部Ｆ３，Ｆ４に回り込む分だけ、
大幅に長くなる。Therefore, the transformer of this embodiment is
The primary windings 16A and 16B are substantially the same as the first embodiment except that the mounting forms of the terminal pins 8A and 8B are different.
And the space between the secondary windings 17A and 17B
Although not shown, the safety standard has a sufficient length as in the first embodiment. That is, the terminal pins 8A,
Since the insertion groove 14a is formed in the third side portion F3 and the fourth side portion F4 which are offset by 90 ° from the first side portion F1 in which 8B is arranged, the primary winding 16 made of a heavy insulated wire is formed. Is routed from the third or fourth side portion to the first side portion through the insertion groove 14a, and then connected to the terminal pin 8A by soldering H. The space / creep distance D2 in this case is determined by the insertion of the secondary winding 17 wound around the main winding frame 11 from the tips of the lead-out portions 16a and 16b connected to the terminal pin 8A, which are not thermally deteriorated. This is the distance to the groove 14a. This space / creep distance D2 is determined by setting the primary winding 16 to the auxiliary winding frame 1
As compared with the case of pulling out along the axial direction of 2, the amount of turning around from the first side portion F1 to the third side portions F3, F4,
It will be significantly longer.

【００３５】また、２つの挿通溝１４ａは、第１実施形
態と同様に、第３または第４の側部Ｆ３，Ｆ４における
第２の側部Ｆ２寄りの部位に位置して、第３，第４の側
部Ｆ３，Ｆ４におけるボビン本体１０ａの幅のほぼ半分
にも及ぶ大きな幅に形成されている。そのため、重絶縁
電線からなる一次巻線１６は、僅かに曲げるだけで第１
の挿通溝１４ａを通過させることができるから、一次巻
線１６が中間つば部１４の角部でこすれて絶縁被覆層が
剥がれるといったおそれがない。また、挿通溝１４ａを
２つ設けたから、単一の挿通溝に一次巻線１６のすべて
の挿通部分を通過させる場合と異なり、混線状態が発生
しないので、引き出しおよび半田付け作業が容易にな
る。ただし、挿通溝１４a は単一としてもよく、その場
合、端子ピン８Ａ，８Ｂが設けられた第１の側部Ｆ１か
ら最も遠い第２の側部に挿通溝１４ａのみを設けるのが
好ましく、これにより、空間・沿面距離を長くとること
ができる。Further, as in the first embodiment, the two insertion grooves 14a are located at a portion of the third or fourth side portion F3, F4 close to the second side portion F2, and are located at the third and third sides. The bobbin body 10a is formed to have a large width that is almost half the width of the bobbin main body 10a at the side portions F3 and F4. Therefore, the primary winding 16 made of a heavy insulated wire can be made into a first winding wire by bending it slightly.
Since it can pass through the insertion groove 14a, there is no possibility that the primary winding 16 is rubbed at the corner of the intermediate flange portion 14 and the insulating coating layer is peeled off. Further, since the two insertion grooves 14a are provided, unlike the case where all insertion portions of the primary winding 16 are passed through a single insertion groove, a cross-linking state does not occur, so that the drawing and soldering work are facilitated. However, the insertion groove 14a may be single, and in that case, it is preferable to provide only the insertion groove 14a on the second side portion farthest from the first side portion F1 on which the terminal pins 8A and 8B are provided. This makes it possible to increase the space and creepage distance.

【００３６】図５は本発明の第３実施形態に係る縦型の
トランスを示す斜視図である。このトランスのボビン１
０は、ボビン本体１０ａの外周面が円形に形成されてい
る。補助巻枠部１２のつば部１５に、ボビン１０におけ
る径方向で相対向する第１と第２の側部Ｆ１，Ｆ２に位
置して、それぞれ一次巻線用と二次巻線用の端子ピン８
Ａ，８Ｂが配設されている。中間つば部１５には、ボビ
ン１０における径方向で相対向する第３と第４の側部Ｆ
３，Ｆ４の両方に位置して、中間つば部１５の端部から
底部に向かって進入し、かつ端子ピン８Ａ，８Ｂの配列
方向にほぼ直角に位置し、かつボビン本体１０ａの外周
面に対して、ほぼ、その接線方向に延びるする第１カッ
ト面２０と、この第１カット面２０に対してボビン本体
の軸心回りに９０°の角度だけ離れた第２カット面２１
とによりほぼＶ字形状となった第１の挿通溝１４ａが形
成されている。この第１の挿通溝１４ａの角度θは、３
０°以上で９０°以下が好ましく、４５°以上で９０°
以下がより好ましい。さらに、中間つば部１４には、第
２の側部Ｆ２に対向する辺に、二次巻線１７を個々に挿
通させるための複数個の第２の挿通溝１４ｂが形成され
ている。その他の構成は、第１実施形態と同様であるの
で、その説明を省略する。FIG. 5 is a perspective view showing a vertical transformer according to the third embodiment of the present invention. Bobbin 1 of this transformer
In 0, the outer peripheral surface of the bobbin main body 10a is formed in a circular shape. Terminal pins for the primary winding and for the secondary winding, which are located on the flange portion 15 of the auxiliary winding frame portion 12 on the first and second side portions F1 and F2 of the bobbin 10 which are opposed to each other in the radial direction. 8
A and 8B are arranged. The intermediate brim portion 15 has third and fourth side portions F that are opposed to each other in the radial direction of the bobbin 10.
3 and F4, enter from the end of the intermediate flange portion 15 toward the bottom, and are located substantially at right angles to the arrangement direction of the terminal pins 8A, 8B, and with respect to the outer peripheral surface of the bobbin main body 10a. The first cut surface 20 extending substantially in the tangential direction and the second cut surface 21 separated from the first cut surface 20 by an angle of 90 ° around the axis of the bobbin body.
The first insertion groove 14a having a substantially V shape is formed by the above. The angle θ of the first insertion groove 14a is 3
0 ° or more and 90 ° or less are preferable, 45 ° or more and 90 °
The following is more preferred. Further, in the intermediate flange portion 14, a plurality of second insertion grooves 14b for individually inserting the secondary windings 17 are formed on the side facing the second side portion F2. The other configurations are similar to those of the first embodiment, and thus the description thereof will be omitted.

【００３７】この実施形態のトランスは、図２と図５と
の比較から明らかなように、各巻線１６、１７が第１実
施形態とほぼ同様に巻かれており、二次巻線１７が中間
つば部１４の複数個の第２の挿通溝１４ｂに個々に通さ
れる構成においてのみ第１実施形態と相違する。このト
ランスにおいても、中間つば部１４の第３と第４の側部
Ｆ３，Ｆ４にそれぞれ位置する第１の挿通溝１４ａが形
成されているから、主巻枠部１１に巻かれた一次巻線１
６は、第１の挿通溝１４ａを通って第３または第４の側
部Ｆ３，Ｆ４から第１または第２の側部Ｆ１，Ｆ２に回
り込んだうえで、第１の側部Ｆ１にある一次側の端子ピ
ン８Ａに半田Ｈ付けで接続される。したがって、この場
合の空間・沿面距離Ｄ３は、端子ピン８Ａに接続された
引出し部１６ａ，１６ｂにおける熱劣化していない先端
部から、主巻枠部１１に巻かれた二次巻線１７にまでの
距離となり、この空間・沿面距離Ｄ３は、一次巻線１６
を軸心方向に沿って補助巻枠部１２を通過させて引き出
す場合に比較して、第１の側部Ｆ１から第３または第４
の側部Ｆ３，Ｆ４に回り込む分だけ、大幅に長くなる。In the transformer of this embodiment, as is clear from the comparison between FIG. 2 and FIG. 5, each winding 16, 17 is wound in substantially the same manner as in the first embodiment, and the secondary winding 17 is an intermediate winding. It differs from the first embodiment only in the configuration in which the plurality of second insertion grooves 14b of the flange portion 14 are individually inserted. Also in this transformer, since the first insertion grooves 14a respectively located on the third and fourth side portions F3, F4 of the intermediate flange portion 14 are formed, the primary winding wound on the main winding frame portion 11 is formed. 1
6 is located in the first side portion F1 after passing through the first insertion groove 14a and wrapping around from the third or fourth side portion F3, F4 to the first or second side portion F1, F2. It is connected to the terminal pin 8A on the primary side by soldering H. Therefore, the space / creep distance D3 in this case is from the tip portion of the lead-out portions 16a and 16b connected to the terminal pin 8A, which are not thermally deteriorated, to the secondary winding 17 wound around the main winding frame portion 11. And the space / creeping distance D3 is equal to the primary winding 16
Compared with the case where the auxiliary winding frame portion 12 is pulled out along the axial direction, the first side portion F1 to the third or fourth side portion F1 are pulled out.
The length is significantly lengthened by the amount that it goes around the side portions F3 and F4.

【００３８】その他に、前述した第１実施形態の種々の
効果と同等の効果を得ることができる。それに加えて、
二次巻線１７を個々の挿通溝１４ｂを通して混線なく補
助巻枠部１２を通過させることができる。さらに、ボビ
ン１０のボビン本体１０ａの外周面が円形になっている
ので、巻線１６，１７を円滑に巻き付けられる利点があ
る。この実施形態のトランスは、第１実施形態のトラン
スの第１および第２の挿通溝１４ａ、１４ｂと同等の機
能を得られる第１および第２の挿通溝１４ａ、１４ｂ
を、円形の外周面を有するボビン本体１０ａに支障なく
一体形成できる形状としたものであり、このボビン１０
は、第１実施形態のボビン１０を樹脂成形するための金
型と同じ割り数の金型で樹脂成形できる。Besides, it is possible to obtain the same effects as the various effects of the first embodiment described above. In addition to it,
The secondary winding 17 can be passed through the auxiliary winding frame portion 12 through the individual insertion grooves 14b without crosstalk. Furthermore, since the outer peripheral surface of the bobbin main body 10a of the bobbin 10 is circular, there is an advantage that the windings 16 and 17 can be smoothly wound. The transformer of this embodiment has first and second insertion grooves 14a and 14b that can achieve the same functions as the first and second insertion grooves 14a and 14b of the transformer of the first embodiment.
Has a shape that can be integrally formed with the bobbin main body 10a having a circular outer peripheral surface without any hindrance.
Can be resin-molded with the same number of molds as the mold for resin-molding the bobbin 10 of the first embodiment.

【００３９】なお、上述の各実施形態では、一次巻線を
重絶縁電線で形成した場合を示したが、二次巻線を重絶
縁電線で形成し、一次巻線およびベース巻線を軽絶縁電
線で形成してもよい。この場合、各巻線を巻き付ける箇
所を変更する。例えば、二次巻線を重絶縁電線で形成し
て、この二次巻線の大部分の巻数を主巻枠部に巻くとと
もに、残りの巻数を補助巻枠部に巻き、一次巻線および
ベース巻線は、いずれも軽絶縁電線で形成するととも
に、その全ての巻数を主巻枠部に巻く構成としてもよ
い。さらに、ベース巻線は、軽絶縁電線で形成するとと
もに、補助巻枠部に個別に、あるいは一次巻線または二
次巻線の一部と重ねて巻いてもよい。In each of the above-described embodiments, the case where the primary winding is formed of a heavy insulated wire is shown, but the secondary winding is formed of a heavy insulated wire and the primary winding and the base winding are lightly insulated. You may form with an electric wire. In this case, the place where each winding is wound is changed. For example, the secondary winding is formed of heavy insulated wire, and most of the number of turns of this secondary winding is wound on the main bobbin part, and the remaining number of turns is wound on the auxiliary bobbin part, and the primary winding and the base are wound. Each of the windings may be formed of a light insulated electric wire, and all of the windings may be wound around the main winding frame portion. Further, the base winding may be formed of a light insulated wire, and may be wound around the auxiliary winding frame portion individually or overlapping a part of the primary winding or the secondary winding.

【００４０】要は、主巻枠部に少なくとも一次巻線と二
次巻線の巻数の大部分が巻かれるとともに、この一次，
二次巻線のうち、重絶縁電線からなる巻線の接続用の引
出し部が、補助巻枠部を通過して端子ピンに接続され
る、或いは補助巻枠部に一部を巻かれて端子ピンに接続
される構成を備えていれば、安全規格に規定の空間・沿
面距離を確保できる。The point is that at least most of the number of turns of the primary winding and the secondary winding is wound around the main winding frame part, and
Of the secondary winding, the lead-out portion for connection of the winding consisting of heavy insulated wire passes through the auxiliary winding frame portion and is connected to the terminal pin, or is partially wound around the auxiliary winding frame portion and the terminal If it has a structure that is connected to a pin, the space and creepage distance specified in the safety standard can be secured.

【００４１】また、一次巻線、二次巻線およびベース巻
線の全てを重絶縁電線で形成してもよい。Further, all of the primary winding, the secondary winding and the base winding may be formed of heavy insulated wires.

【００４２】[0042]

【発明の効果】本発明のトランスによれば、縦型および
横型のいずれのトランスにおいても、安全規格を十分確
保できる空間・沿面距離を形成できる。そのうえに、中
間つば部の所要の箇所に大きな幅の挿通溝を形成したの
で、重絶縁電線からなる巻線を、僅かに曲げるだけで挿
通溝を通過させながら補助巻枠部と主巻枠部との間に連
続的に巻き付けできる結果、重絶縁電線の絶縁被覆層の
剥がれや、隣接する巻線間が電気的短絡するといったト
ラブルの発生が絶無となる。また、重絶縁電線を挿通溝
を通ってスムーズに巻き付けできることと、挿通溝に混
線状態が生じないことから引出しおよび半田付け作業が
容易になることとにより、生産性を高めることができ
る。さらに、巻線を巻くための補助巻線部を利用して所
要の空間・沿面距離を確保する構成としたので、ボビン
の形状を小さくでき、小型化を要求される高周波電源用
のトランスとして適したものとなる。According to the transformer of the present invention, it is possible to form a space / creep distance capable of sufficiently ensuring safety standards in both vertical and horizontal transformers. On top of that, since a large width insertion groove was formed at the required location of the intermediate brim portion, the winding consisting of heavy insulated wire was passed through the insertion groove by slightly bending it, and the auxiliary winding frame portion and the main winding frame portion were formed. As a result of the continuous winding between the windings, the occurrence of troubles such as peeling of the insulating coating layer of the heavy insulated electric wire and electrical short circuit between adjacent windings is inevitable. Further, the heavy insulated wire can be smoothly wound through the insertion groove, and the drawing and soldering work can be facilitated because the insertion groove does not cause a mixed wire state, thereby improving productivity. Furthermore, the auxiliary winding part for winding the winding is used to secure the required space and creepage distance, which makes it possible to reduce the bobbin shape and is suitable as a transformer for high-frequency power supplies that require miniaturization. It becomes a thing.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明の第１実施形態に係るトランスを示す縦
断側面図である。FIG. 1 is a vertical sectional side view showing a transformer according to a first embodiment of the present invention.

【図２】同上トランスのボビンを示す斜視図である。FIG. 2 is a perspective view showing a bobbin of the same transformer.

【図３】同上のンスの配線を示す回路図である。FIG. 3 is a circuit diagram showing the wiring of the same as above.

【図４】本発明の第２実施形態に係るトランスのボビン
を示す斜視図である。FIG. 4 is a perspective view showing a bobbin of a transformer according to a second embodiment of the present invention.

【図５】本発明の第３実施形態に係るトランスのボビン
を示す斜視図である。FIG. 5 is a perspective view showing a bobbin of a transformer according to a third embodiment of the present invention.

【図６】従来のトランスを示す縦断面図である。FIG. 6 is a vertical sectional view showing a conventional transformer.

【符号の説明】[Explanation of symbols]

６…コア、８Ａ，８Ｂ…端子ピン、１０…ボビン、１１
…主巻枠部、１２…補助巻枠部、１４…中間つば部、１
５…補助巻枠部側のつば部、１９…主巻枠側のつば部、
１６，１６Ａ，１６Ｂ…一次巻線、１６ａ，１６ｂ…一
次巻線の引出し部、１７，１７Ａ，１７Ｂ…二次巻線、
１７ａ，１７ｂ…二次巻線の引出し部、１８…ベース巻
線（他の巻線）、１９…補助巻枠部のつば部、２０…第
１カット面、２１…第２カット面、Ｆ１…第１の側部、
Ｆ２…第２の側部，Ｆ３…第３の側部、Ｆ４…第４の側
部。6 ... Core, 8A, 8B ... Terminal pin, 10 ... Bobbin, 11
... main reel part, 12 ... auxiliary reel part, 14 ... intermediate brim part, 1
5 ... Collar portion on the side of the auxiliary reel, 19 ... Collar portion on the side of the main reel,
16, 16A, 16B ... Primary winding, 16a, 16b ... Primary winding extraction portion, 17, 17A, 17B ... Secondary winding,
17a, 17b ... Lead-out portion of secondary winding, 18 ... Base winding (other winding), 19 ... Collar portion of auxiliary winding frame portion, 20 ... First cut surface, 21 ... Second cut surface, F1 ... The first side,
F2 ... 2nd side part, F3 ... 3rd side part, F4 ... 4th side part.

Claims

【特許請求の範囲】[Claims]

【請求項１】一次巻線と二次巻線の少なくとも一方
が、複数層の絶縁被覆を施した重絶縁電線で形成され、
コアに取り付けられたボビンに、前記一次巻線と二次巻
線がボビンの径方向に重ねて巻かれたトランスにおい
て、前記ボビンに、主巻枠部と補助巻枠部とが中間つば部を
介在してボビンの軸心方向に並設され、前記補助巻枠部のつば部に、前記ボビンにおける径方向
で相対向する第１と第２の側部に位置して、それぞれ一
次巻線用と二次巻線用の端子ピンが配設され、前記中間つば部に、前記径方向で相対向する第３と第４
の側部の少なくとも一方に位置して、前記中間つば部の
端部から底部に向かって進入し、かつ前記第３または第
４の側部の幅に対し１／４以上で３／４以下の幅を有す
る挿通溝が形成され、前記重絶縁電線からなる巻線の接続用の引出し部が、前
記主巻枠部から前記挿通溝および前記補助巻枠部を経て
前記端子ピンに半田付けにより接続され、前記主巻枠部に前記一次巻線と二次巻線が巻かれるとと
もに、前記補助巻枠部に、前記各巻線のうち、前記重絶
縁電線からなる巻線の一部または他の巻線が巻かれてい
るトランス。1. At least one of the primary winding and the secondary winding is formed of a heavy insulated wire having a plurality of layers of insulation coating,
In a transformer in which the primary winding and the secondary winding are wound around the bobbin attached to the core in the radial direction of the bobbin, the main bobbin portion and the auxiliary bobbin portion have an intermediate brim portion on the bobbin. Are arranged side by side in the axial direction of the bobbin and are located on the flange portion of the auxiliary winding frame portion on the first and second side portions of the bobbin that face each other in the radial direction. And a terminal pin for a secondary winding are arranged, and the third and fourth portions facing each other in the radial direction are provided on the intermediate flange portion.
Is located at least on one of the side portions of the intermediate flange portion, enters from the end portion of the intermediate collar portion toward the bottom portion, and is ¼ or more and 3/4 or less of the width of the third or fourth side portion. An insertion groove having a width is formed, and a lead-out portion for connecting a winding formed of the heavy insulated wire is connected to the terminal pin from the main winding frame portion through the insertion groove and the auxiliary winding frame portion by soldering. The primary winding and the secondary winding are wound around the main winding frame part, and the auxiliary winding frame part includes a part of the windings of the heavy insulated wire or another winding of the windings. A transformer with a wire wound around it.

【請求項２】一次巻線と二次巻線の少なくとも一方
が、複数層の絶縁被覆を施した重絶縁電線で形成され、
コアに取り付けられたボビンに、前記一次巻線と二次巻
線がボビンの径方向に重ねて巻かれたトランスにおい
て、前記ボビンに、主巻枠部と補助巻枠部とが中間つば部を
介在してボビンの軸心方向に並設され、前記主巻枠部のつば部と補助巻枠部のつば部のそれぞれ
に、前記ボビンにおける第１の側部に位置して、一次巻
線用と二次巻線用の端子ピンが配設され、前記中間つば部に、前記径方向で前記第１の側部に対向
する第２の側部、および径方向で相対向する第３と第４
の側部のうち、少なくとも１つの側部に位置して、前記
中間つば部の端部から底部に向かって進入し、かつ前記
側部の幅に対し１／４以上で３／４以下の幅を有する挿
通溝が形成され、前記重絶縁電線からなる巻線の接続用の引出し部が、前
記主巻枠部から前記挿通溝および前記補助巻枠部を経て
前記端子ピンに半田付けにより接続され、前記主巻枠部に前記一次巻線と二次巻線が巻かれるとと
もに、前記補助巻枠部に、前記各巻線のうち、前記重絶
縁電線からなる巻線の一部または他の巻線が巻かれてい
るトランス。2. At least one of the primary winding and the secondary winding is formed of a heavy insulated wire having a plurality of layers of insulation coating,
In a transformer in which the primary winding and the secondary winding are wound around the bobbin attached to the core in the radial direction of the bobbin, the main bobbin portion and the auxiliary bobbin portion have an intermediate brim portion on the bobbin. Are arranged side by side in the axial direction of the bobbin and are located on the first side portion of the bobbin at the collar portion of the main winding frame portion and the collar portion of the auxiliary winding frame portion, respectively, for the primary winding. And a terminal pin for a secondary winding, the second side portion facing the first side portion in the radial direction, and the third side and the third side facing each other in the radial direction in the intermediate flange portion. Four
Of at least one of the side portions of the intermediate side portion of the intermediate flange portion, entering from the end portion of the intermediate collar portion toward the bottom portion, and having a width of 1/4 or more and 3/4 or less of the width of the side portion. And a lead-out portion for connecting a winding made of the heavy insulated wire is connected to the terminal pin from the main winding frame portion through the insertion groove and the auxiliary winding portion to the terminal pin by soldering. While the primary winding and the secondary winding are wound around the main winding frame part, a part of the windings formed of the heavy insulated wire or another winding is wound around the auxiliary winding frame part among the windings. Is a transformer.

【請求項３】一次巻線と二次巻線の少なくとも一方
が、複数層の絶縁被覆を施した重絶縁電線で形成され、
コアに取り付けられたボビンに、前記一次巻線と二次巻
線がボビンの径方向に重ねて巻かれたトランスにおい
て、ボビン本体の外周面が円形となった前記ボビンに、主巻
枠部と補助巻枠部とが中間つば部を介在してボビンの軸
心方向に並設され、前記補助巻枠部のつば部に、前記ボビンにおける径方向
で相対向する第１と第２の側部に位置して、それぞれ一
次巻線用と二次巻線用の端子ピンが配設され、前記中間つば部に、前記径方向で相対向する第３と第４
の側部の少なくとも一方に位置して、前記中間つば部の
端部から底部に向かって進入し、かつ一方の前記端子ピ
ンの配列方向にほぼ直角に位置する第１カット面とこの
第１カット面に対してボビン本体の軸心回りに３０°以
上で９０°以下の角度だけ離れた第２カット面とにより
ほぼＶ字形状となった挿通溝が形成され、前記重絶縁電線からなる巻線の接続用の引出し部が、前
記主巻枠部から前記挿通溝および前記補助巻枠部を経て
一方の前記端子ピンに半田付けにより接続され、前記主巻枠部に前記一次巻線と二次巻線が巻かれるとと
もに、前記補助巻枠部に、前記各巻線のうち、前記端子
ピンに接続された重絶縁電線からなる巻線の一部または
他の巻線が巻かれているトランス。3. At least one of the primary winding and the secondary winding is formed of a heavy insulated wire having a plurality of layers of insulation coating,
In a transformer in which the primary winding and the secondary winding are wound around the bobbin attached to the core in the radial direction of the bobbin, the bobbin main body has a circular outer peripheral surface, Auxiliary bobbin portions are arranged side by side in the axial direction of the bobbin with an intermediate brim portion interposed, and first and second side portions of the auxiliary bobbin portion that are radially opposed to each other in the bobbin are provided. And terminal pins for the primary winding and the secondary winding, respectively, are disposed at the positions, and the third and fourth terminals facing each other in the radial direction are provided on the intermediate flange portion.
A first cut surface that is located on at least one of the side portions of the intermediate rib portion, enters from the end portion of the intermediate flange portion toward the bottom portion, and is positioned substantially at right angles to the arrangement direction of the one terminal pin, and the first cut surface. A winding wire made of the above-mentioned heavy insulated wire is formed with a substantially V-shaped insertion groove formed by a second cut surface that is separated from the surface about the axis of the bobbin body by an angle of 30 ° or more and 90 ° or less. A lead-out portion for connection of the main winding frame portion is soldered to the one terminal pin through the insertion groove and the auxiliary winding frame portion, and the primary winding and the secondary winding are connected to the main winding frame portion. A transformer, in which a winding is wound, and a part of the winding of the heavy winding insulated wire connected to the terminal pin or another winding is wound around the auxiliary winding frame portion.