JP6175870B2 - Surface mount balun transformer - Google Patents

Surface mount balun transformer Download PDF

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JP6175870B2
JP6175870B2 JP2013079272A JP2013079272A JP6175870B2 JP 6175870 B2 JP6175870 B2 JP 6175870B2 JP 2013079272 A JP2013079272 A JP 2013079272A JP 2013079272 A JP2013079272 A JP 2013079272A JP 6175870 B2 JP6175870 B2 JP 6175870B2
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base
balun transformer
glasses
mounting
type core
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JP2014203989A (en
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川添　勝
勝 川添
大場　裕一
裕一 大場
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Murata Manufacturing Co Ltd
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Description

本発明は、メガネ型コアを用いた面実装バルントランスに関する。   The present invention relates to a surface mount balun transformer using a glasses-type core.

ダブルバランスドミキサ、広帯域トランス、インピーダンス変換用トランスなどに使用可能な高周波トランスとして、メガネ型コアを用いたバルントランスが用いられている。   A balun transformer using a glasses-type core is used as a high-frequency transformer that can be used for a double balanced mixer, a broadband transformer, an impedance conversion transformer, and the like.

図５は、従来の面実装バルントランスの分解透視斜視図である。図において、巻線は省略している。
面実装バルントランス６０は、略矩形の板状の樹脂ベース８０と、ベース８０の上に載置された貫通孔７１ａ、７１ｂを有するメガネ型コア７０と、メガネ型コア７０に巻回された巻線からなる。
ベース８０の上面には、メガネ型コア７０に嵌合する凹部８５が設けられ、凹部８５に接着剤５０が塗布され、メガネ型コア７０が嵌合するように載置されて、固定されている。
ベース８０の対向する両側面には、複数の金属端子９１が等間隔に植設され、金属端子９１の根元の絡げ部９１ｂに巻線の端末が絡げられる。
ベース８０の隣り合う金属端子９１と金属端子９１との間には、絡げた巻線の端末の引出し方向を規制するとともに、金属端子間での短絡を防止するための、ベース８０の外周方向に突出する凸部８１が設けられている。
またベース８０には、平面視で面実装バルントランスの極性を分かるように、切り欠き８６が設けられている。 FIG. 5 is an exploded perspective view of a conventional surface mount balun transformer. In the figure, the winding is omitted.
The surface-mount balun transformer 60 includes a substantially rectangular plate-shaped resin base 80, a glasses-type core 70 having through holes 71 a and 71 b placed on the base 80, and a winding wound around the glasses-type core 70. Consists of lines.
The upper surface of the base 80 is provided with a recess 85 that fits into the glasses-type core 70, the adhesive 50 is applied to the recess 85, and the glasses-type core 70 is placed and fixed so as to fit. .
A plurality of metal terminals 91 are planted at equal intervals on both opposing side surfaces of the base 80, and the ends of the windings are entangled with the binding portion 91 b at the base of the metal terminals 91.
Between the adjacent metal terminals 91 of the base 80 and the metal terminals 91, in the outer circumferential direction of the base 80, the direction of the end of the wound winding is regulated and a short circuit between the metal terminals is prevented. A protruding convex portion 81 is provided.
The base 80 is provided with a notch 86 so that the polarity of the surface mount balun transformer can be seen in plan view.

特開２００２−１９８２２７号公報JP 2002-198227 A 特開平１１−８７１４８号公報JP 11-87148 A

近年、電子機器の小型薄型化や高機能化に伴って、面実装バルントランスも高密度実装が可能な物が求められている。しかし、上記した面実装バルントランス６０は、凹部８５を設けるため縁取りｗ（図中、斜線で示す）だけベース８０を大きくしなければならなかった。また、金属端子９１の根元の絡げ部９１ａに巻線端末を絡げるとともに先端を実装部９１ｂとしているため、金属端子９１にはある程度の長さが必要になり、金属端子９１の延出方向の長さが短くできなかった。その結果、回路基板上での面実装バルントランスの占有面積を小さくできないという問題があった。   In recent years, with the downsizing and thinning of electronic devices and the enhancement of functionality, surface mount balun transformers that can be mounted at high density have been demanded. However, since the surface mount balun transformer 60 described above is provided with the recess 85, the base 80 has to be enlarged by the edge w (indicated by hatching in the figure). Further, since the winding terminal is tied to the base binding portion 91a of the metal terminal 91 and the tip is the mounting portion 91b, the metal terminal 91 needs a certain length, and the metal terminal 91 extends. The direction length could not be shortened. As a result, there is a problem that the area occupied by the surface mount balun transformer on the circuit board cannot be reduced.

本発明の面実装バルントランスは、複数の貫通孔を有するメガネ型コアと、前記メガネ型コアを載置する載置面を有するベースと、前記ベースに植設された複数の金属端子とからなり、前記金属端子は、前記ベースの対向する側面から露出する絡げ部と、前記対向する側面と直交する側面から露出する実装部とを備え、前記絡げ部が隣接する間の前記ベース側面に、前記ベースの外周方向に突出するとともに載置面より上方に突出する、凸部を設けた、ことを特徴とする。   The surface mount balun transformer of the present invention includes a glasses-type core having a plurality of through holes, a base having a placement surface on which the glasses-type core is placed, and a plurality of metal terminals implanted in the base. The metal terminal includes a binding portion exposed from the opposite side surface of the base, and a mounting portion exposed from a side surface orthogonal to the opposing side surface, and the base terminal side surface while the binding portion is adjacent to the base portion. A convex portion is provided which protrudes in the outer peripheral direction of the base and protrudes upward from the mounting surface.

本発明の面実装バルントランスによれば、回路基板上への高密度実装が可能な、占有面積が小さい面実装バルントランスを提供することができる。   According to the surface mount balun transformer of the present invention, it is possible to provide a surface mount balun transformer that can be mounted on a circuit board with high density and has a small occupation area.

本発明の面実装バルントランスの一実施例を示す斜視図である。It is a perspective view which shows one Example of the surface mount balun transformer of this invention. 図１の面実装バルントランスの分解透視斜視図である。FIG. 2 is an exploded perspective view of the surface mount balun transformer of FIG. 1. 製造工程での金属端子を説明するための図である。It is a figure for demonstrating the metal terminal in a manufacturing process. ベースの様々な実施例を示す透視斜視図である。FIG. 6 is a perspective view showing various examples of the base. 従来の面実装バルントランスの分解透視斜視図である。It is a disassembled perspective view of the conventional surface mount balun transformer.

以下、本発明の面実装バルントランスの一実施例を図面を用いて説明する。
図１は本発明の面実装バルントランスの斜視図であり、図２は図１の分解透視斜視図を示す。図において、巻線は省略している。 Hereinafter, an embodiment of the surface mount balun transformer of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of a surface mount balun transformer of the present invention, and FIG. 2 is an exploded perspective view of FIG. In the figure, the winding is omitted.

図１乃至図２に示すように、面実装バルントランス１０は、略矩形の板状の樹脂製のベース３０と、ベース３０の上面に載置された貫通孔２１ａ、２１ｂを有するメガネ型コア２０とメガネ型コア２０に巻回された巻線からなる。   As shown in FIGS. 1 and 2, the surface mount balun transformer 10 includes a glasses-shaped core 20 having a substantially rectangular plate-shaped resin base 30 and through holes 21 a and 21 b placed on the upper surface of the base 30. And a winding wound around the glasses-type core 20.

ベース３０にはＬ字形状に形成された複数の金属端子４１〜４６が植設され、金属端子４１〜４６の一方の先端の絡げ部４１ａ、４２ａ、４３ａ、４４ａ、４５ａ、４６ａは、ベース３０の一方の対向する側面から等間隔に露出し、他方の先端の実装部４１ｂ、４２ｂ、４３ｂ、４４ｂ、４５ｂ、４６ｂは、対向する側面と直交するいずれかの側面から等間隔に露出し、金属端子４１〜４６が平面視交差しないように配置されている。   A plurality of L-shaped metal terminals 41 to 46 are planted on the base 30, and the binding portions 41 a, 42 a, 43 a, 44 a, 45 a, 46 a at one end of the metal terminals 41 to 46 are 30 are exposed at equal intervals from one opposing side surface, and the mounting portions 41b, 42b, 43b, 44b, 45b, 46b at the other end are exposed at equal intervals from any side surface orthogonal to the opposing side surface, The metal terminals 41 to 46 are arranged so as not to intersect in plan view.

隣接する絡げ部４１ａと４２ａ、４２ａと４３ａ、４４ａと４５ａ、４５ａと４６ａのそれぞれの間には、ベース３０の外周方向に突出するとともに載置面より上方に突出する凸部３１、３２、３３、３４がそれぞれ設けられている。 Between each of the adjacent binding portions 41a and 42a, 42a and 43a, 44a and 45a, 45a and 46a, convex portions 31, 32 that protrude in the outer peripheral direction of the base 30 and protrude upward from the placement surface, 33 and 34 are provided, respectively.

実装部４１ｂ、４２ｂ、４３ｂ、４４ｂ、４５ｂ、４６ｂは、ベース３０の側面から底面に沿って折り曲げられて実装基板との接続をするための実装端子となる。また、載置面には、接着剤のはみ出しを防止するための接着剤溜まり３５が設けられている。   The mounting parts 41b, 42b, 43b, 44b, 45b, and 46b are bent from the side surface of the base 30 along the bottom surface to serve as mounting terminals for connection to the mounting board. An adhesive reservoir 35 is provided on the mounting surface to prevent the adhesive from protruding.

上記した面実装バルントランス１０に、絶縁被覆された導線が巻線され、金属端子４１〜４６の絡げ部に巻線の端末部が絡げられて、半田ディップ等により電気的に接続される。絡げる金属端子や、巻回仕様は、面実装バルントランスの仕様による。   A conductive wire with insulation coating is wound around the surface mount balun transformer 10 described above, and a terminal portion of the winding is wound around the tangled portions of the metal terminals 41 to 46, and is electrically connected by soldering dip or the like. . The metal terminals to be bound and the winding specifications depend on the specifications of the surface mount balun transformer.

図３は、製造工程での金属端子を説明するための図である。金属端子４１〜４６は、連続したフレーム４０を打ち抜いて形成されている。
図中、一点鎖線で示した部分が樹脂に埋設され、点線で示した部分で切断されてフレーム４０から切り離される。 FIG. 3 is a diagram for explaining a metal terminal in the manufacturing process. The metal terminals 41 to 46 are formed by punching a continuous frame 40.
In the drawing, the portion indicated by the alternate long and short dash line is embedded in the resin, cut at the portion indicated by the dotted line, and separated from the frame 40.

上記した面実装バルントランス１０は、凸部３１〜３４により、隣り合う金属端子と巻線の引出し方向を規制するとともに絡げ部での短絡を防止し、さらにメガネ型コア２０の載置位置も規制することができる。また、金属端子の絡げ部と実装部とを別々の端末としたので、端子の突き出しを短くできる。
さらにまた金属端子４１〜４６は、Ｌ字形状の部分が樹脂に埋設されているので、端子の抜け強度を強めることができ、絡げ部と実装部を分けたので、絡げ作業時のテンションより実装端子の配列が乱れてしまう虞もない。 The surface mount balun transformer 10 described above regulates the drawing direction of the adjacent metal terminals and windings by the convex portions 31 to 34, prevents a short circuit at the binding portion, and further places the mounting position of the glasses-type core 20 as well. Can be regulated. Moreover, since the binding part and the mounting part of the metal terminal are separate terminals, the protrusion of the terminal can be shortened.
Furthermore, since the L-shaped portion of the metal terminals 41 to 46 is embedded in the resin, the terminal pull-out strength can be increased, and the binding portion and the mounting portion are separated. There is no risk that the arrangement of the mounting terminals will be disturbed.

金属端子は、Ｌ字形状に限らず、十字形状、Ｔ字形状とすることもできる。図４は、ベースの様々な実施例を示す透視斜視図である。図において、樹脂部分の略外形を点線で示す。
図４（ａ）において、金属端子４２１は、絡げ部４２１ａ、４２１ｂと、実装部４２１ｃ、４２１ｄとを有する十字形状としている。
図４（ｂ）において、金属端子４２２は、絡げ部４２２ａ、４２１ｂと、実装部４２１ｄとを有するＴ字形状としている。
図４（ｃ）において、金属端子４２３は、絡げ部４２３ａと、実装部４２３ｃ、４２３ｄとを有するＴ字形状としている。 The metal terminal is not limited to the L shape, and may be a cross shape or a T shape. FIG. 4 is a perspective perspective view showing various embodiments of the base. In the figure, the outline of the resin portion is indicated by a dotted line.
4 (a), the metal terminal 421 is in tying portion 421a, and 421b, the mounting portion 421c, a cross shape and a 421d.
4 (b), the metal terminal 422 is in a T-shape having tied part 422a, and 421b, and a mounting portion 421d.
In FIG. 4 (c), the metal terminal 423 is in the tying portion 423a, the mounting portion 423c, a T-shape and a 423d.

図４（ｂ）と図４（ｂ）に示したように、金属端子をＴ字形状とすることにより、従来の面実装バルントランスの切り欠きによる極性表示の代わりとすることができる。 As shown in FIGS. 4 (b) and 4 (b), the metal terminal can be replaced with a polarity display by notching a conventional surface mount balun transformer by making the metal terminal T-shaped.

１０、６０ 面実装バルントランス
２０，７０ メガネ型コア
２１ａ、２１ｂ、７１ａ、７１ｂ 貫通孔
３０、８０ ベース
３１〜３４、８１〜８４ 凸部
３５ 接着剤溜まり
４０ フレーム
４１〜４６、９１、４２１，４２２，４２３ 金属端子
４１ａ〜４６ａ、９１ａ 絡げ部
４１ｂ〜４６ｂ、９１ｂ 実装部
５０ 接着剤
８５ 凹部
８６ 切り欠き 10, 60 Surface mounted balun transformers 20, 70 Glasses-type cores 21a, 21b, 71a, 71b Through holes 30, 80 Bases 31-34, 81-84 Convex part 35 Adhesive reservoir 40 Frames 41-46, 91, 421, 422 , 423 Metal terminals 41a to 46a, 91a Tying portions 41b to 46b, 91b Mounting portion 50 Adhesive 85 Recess 86 Notch

Claims (4)

複数の貫通孔を有するメガネ型コアと、
前記メガネ型コアを載置する載置面を有するベースと、
前記ベースに植設された複数の金属端子とからなり、
前記金属端子は、
前記ベースの対向する側面から露出する絡げ部と、
前記対向する側面と直交する側面から露出する実装部とを備え、
前記絡げ部が隣接する間の前記ベース側面に、前記ベースの外周方向に突出するとともに
載置面より上方に突出する、複数の凸部を設け、
前記複数の凸部は、前記メガネ型コアの載置位置を規制するように配置された、
ことを特徴とする面実装バルントランス。 Glasses-type core having a plurality of through holes;
A base having a mounting surface for mounting the glasses-type core;
It consists of a plurality of metal terminals implanted in the base,
The metal terminal is
A binding portion exposed from the opposite side surfaces of the base;
A mounting portion exposed from the side surface orthogonal to the opposing side surface,
Provided with a plurality of convex portions on the side surface of the base while the binding portions are adjacent to each other, projecting in the outer peripheral direction of the base and projecting upward from the placement surface ;
The plurality of convex portions are arranged so as to regulate the placement position of the glasses-type core ,
A surface-mount balun transformer characterized by that. 前記メガネ型コアに巻回した巻線をさらに備え、
前記巻線の端末を前記絡げ部に接続した、
請求項１記載の面実装バルントランス。 Further comprising a winding wound around the glasses-type core,
Connecting the terminals of the winding before Symbol tied part,
The surface-mount balun transformer according to claim 1. 前記実装部は、前記ベースの側面から底面に沿って折り曲げた、
請求項１乃至２記載の面実装バルントランス。 The mounting portion is bent along the bottom surface from the side surface of the base,
The surface-mount balun transformer according to claim 1. 前記載置面に接着剤溜まりを設けた、
請求項１乃至３記載の面実装バルントランス。 An adhesive reservoir was provided on the mounting surface,
The surface-mount balun transformer according to claim 1.
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US6583703B2 (en) * 2001-06-20 2003-06-24 Koninklijke Philips Electronics N.V. Electrical apparatus having an electromagnetic device operable at multiple inductance values
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