JP6572091B2 - Composite transformer module - Google Patents
Composite transformer module Download PDFInfo
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- JP6572091B2 JP6572091B2 JP2015203039A JP2015203039A JP6572091B2 JP 6572091 B2 JP6572091 B2 JP 6572091B2 JP 2015203039 A JP2015203039 A JP 2015203039A JP 2015203039 A JP2015203039 A JP 2015203039A JP 6572091 B2 JP6572091 B2 JP 6572091B2
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- 239000002131 composite material Substances 0.000 title claims description 21
- 239000011162 core material Substances 0.000 claims description 121
- 239000011347 resin Substances 0.000 description 15
- 229920005989 resin Polymers 0.000 description 15
- 239000002184 metal Substances 0.000 description 7
- 230000002093 peripheral effect Effects 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005304 joining Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 238000001721 transfer moulding Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
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Description
本発明は、トランスとその周辺部品を組み合わせた複合トランスモジュールに関するものである。 The present invention relates to a composite transformer module that combines a transformer and its peripheral components.
従来、トランスファーモールド製品内部にトランスを内蔵する場合、強度の弱いコア材はモールド樹脂の応力の影響を受けてヒビや割れが生じ易く、大きなサイズのコアはモールドしにくいという問題があった。
また、モールドしたトランスと周辺の回路部品とを組み合わせて回路モジュール化した場合、厚みを薄くするのが困難であった。
Conventionally, when a transformer is built in a transfer molded product, the core material having a low strength is easily affected by the stress of the mold resin, so that cracks and cracks are easily generated, and a large core is difficult to mold.
Also, when a molded transformer and peripheral circuit components are combined to form a circuit module, it is difficult to reduce the thickness.
コア材をモールドしないトランスとして、特許文献１（特開平８−２７３９４４号公報）には、コア穴を中心とする螺旋形の形状をした導体パターンが形成されている基板を積層した積層モールドコイルにコアが装着された平面型トランスが記載されている（特に図１〜３、段落０００８及び００１０を参照）。
また、特許文献２（特開平６−２０４０５３号公報）には、１次側、２次側を予め各々独立した複数巻の空芯のコイルを作り、各々のコイルを樹脂モールドし、それらの樹脂モールドコイルを組み重ねたモールドトランスが記載されている（特に図３〜５、段落０００３、０００７及び０００８を参照）。
As a transformer in which a core material is not molded, Patent Document 1 (Japanese Patent Laid-Open No. 8-273944) discloses a laminated mold coil in which a substrate on which a conductor pattern having a spiral shape centering on a core hole is formed is laminated. A planar transformer with a core attached is described (see especially FIGS. 1-3, paragraphs 0008 and 0010).
In Patent Document 2 (Japanese Patent Laid-Open No. 6-204053), the primary side and the secondary side are each made in advance with a plurality of independent air-core coils, each coil is resin-molded, and the resin A mold transformer in which molded coils are assembled is described (see in particular FIGS. 3-5, paragraphs 0003, 0007 and 0008).
ところが、特許文献１の平面型トランスは一次巻線や二次巻線等を合わせてモールドし実装基板に装着するため、バリエーションを持たせることができず回路モジュールとしてはトランス実装の手間がかかる上に厚くなってしまうという問題や、トランス周辺回路部分まではトランスファーモールドしにくいといった問題があった。
また、特許文献２のモールドトランスは２つの樹脂モールドコイルを組み重ねるだけであるため樹脂モールドコイルがずれて相対位置が変わってしまうという問題、表面実装タイプであるため回路モジュールとしてはトランス実装の手間がかかる上に厚くなってしまうという問題、トランス周辺回路部分まではトランスファーモールドしにくいといった問題があった。
However, since the planar transformer of Patent Document 1 is molded with the primary winding and the secondary winding combined and mounted on the mounting substrate, variations cannot be made and the circuit module takes time and labor for mounting the transformer. However, there is a problem that the transfer peripheral part is difficult to transfer mold.
In addition, since the mold transformer of Patent Document 2 simply assembles two resin mold coils, the resin mold coil is displaced and the relative position changes, and since it is a surface mount type, the circuit module is troublesome to mount a transformer. In addition to this, there is a problem that it becomes thicker, and that it is difficult to transfer mold up to the transformer peripheral circuit part.
本発明は、このような問題点を解決し、トランスを組み込んだ回路モジュールの回路全体を効率良くトランスファーモールドできるようにするとともに、回路モジュールを薄くすることを第一の課題としてなされたものである。
また、本発明は、２つのモールドコイルを組み重ねた後にそれらがずれないようにすることを第二の課題としてなされたものである。
The present invention has been made as a first problem to solve such problems, to enable efficient transfer molding of the entire circuit of a circuit module incorporating a transformer, and to make the circuit module thin. .
In addition, the second object of the present invention is to prevent two molded coils from being displaced after being assembled.
請求項１に係る発明は、一次回路を搭載した一次回路搭載部及び一次側空心インダクターと、二次回路を搭載した二次回路搭載部及び二次側空心インダクターを有し、前記一次回路搭載部及び前記二次回路搭載部は、それぞれ前記一次側空心インダクター及び前記二次側空心インダクターと平面視において重ならない位置に配置されており、前記一次回路搭載部と前記一次側空心インダクターは一次側空心部の中心付近を除き一体的に樹脂モールドされて一次モールドを形成し、前記二次回路搭載部と前記二次側空心インダクターは二次側空心部の中心付近を除き一体的に樹脂モールドされて二次モールドを形成しており、前記一次モールドと前記二次モールドを積み重ねた積層体の前記一次側空心部と前記二次側空心部の中心付近をコア材の柱状部が貫通していることを特徴とする複合トランスモジュールである。 The invention according to claim 1 includes a primary circuit mounting portion and a primary side air-core inductor mounted with a primary circuit, a secondary circuit mounting portion and a secondary side air-core inductor mounted with a secondary circuit, and the primary circuit mounting portion. And the secondary circuit mounting portion is disposed at a position that does not overlap the primary side air core inductor and the secondary side air core inductor in plan view, and the primary circuit mounting portion and the primary side air core inductor are arranged on the primary side. The primary mold is formed by resin molding integrally except for the vicinity of the center of the air core, and the secondary circuit mounting portion and the secondary air core inductor are integrally resin molded except for the vicinity of the center of the secondary air core. A secondary mold is formed, and a core material is provided near the center of the primary side air core part and the secondary side air core part of the laminate in which the primary mold and the secondary mold are stacked. Columnar portion is a complex transformer module, characterized in that penetrates.
請求項２に係る発明は、請求項１に記載の複合トランスモジュールにおいて、前記一次モールドと前記二次モールドの接合面に、互いに嵌合する凹部及び凸部が設けられていることを特徴とする。 According to a second aspect of the present invention, in the composite transformer module according to the first aspect, the joint surface of the primary mold and the secondary mold is provided with a concave portion and a convex portion that are fitted to each other. .
請求項３に係る発明は、請求項２に記載の複合トランスモジュールにおいて、少なくとも前記一次側空心部の中心付近より先端側及び前記二次側空心部の中心付近より先端側が、それぞれ他の部分より薄い薄肉部となっており、少なくとも該薄肉部の前記一次側空心部の中心付近より先端側及び前記二次側空心部の中心付近より先端側が前記接合面となっていることを特徴とする。 The invention according to claim 3 is the composite transformer module according to claim 2 , wherein at least the tip side from the vicinity of the center of the primary side air core part and the tip side from the vicinity of the center of the secondary side air core part are respectively different from the other parts. The thin-walled portion is characterized in that at least the distal end side from the vicinity of the center of the primary-side air core portion of the thin-walled portion and the distal end side from the vicinity of the center of the secondary-side air-core portion serve as the joining surface.
請求項１に係る発明の複合トランスモジュールによれば、一次回路搭載部と一次側空心インダクターは一次側空心部の中心付近を除き一体的に樹脂モールドされて一次モールドを形成し、二次回路搭載部と二次側空心インダクターは二次側空心部の中心付近を除き一体的に樹脂モールドされて二次モールドを形成しており、一次モールドと二次モールドを積み重ねた積層体の一次側空心部と二次側空心部の中心付近をコア材の柱状部が貫通しているので、コア材がモールド樹脂の応力の影響を受けることがなく、コア材にヒビや割れが生じにくくなる。
また、コア材はモールドされないので、回路搭載部をモールドするにもかかわらず、モールド樹脂の量を減らすことができる。
さらに、一次回路搭載部及び二次回路搭載部が、それぞれ一次側空心インダクター及び二次側空心インダクターと平面視において重ならない位置に配置されているので、一次モールド及び二次モールドを薄くすることができ、それらを組み重ねた複合トランスモジュールも薄くすることができる。
According to the composite transformer module of the first aspect of the invention, the primary circuit mounting portion and the primary side air-core inductor are integrally resin-molded except for the vicinity of the center of the primary side air-core portion to form a primary mold, and the secondary circuit mounting The secondary side air-core inductor is integrally molded with a resin except for the vicinity of the center of the secondary side air-core part to form a secondary mold, and the primary side air-core part of the laminate in which the primary mold and the secondary mold are stacked Since the columnar portion of the core material passes through the vicinity of the center of the secondary side air core portion, the core material is not affected by the stress of the mold resin, and the core material is not easily cracked or cracked.
Further, since the core material is not molded, the amount of the mold resin can be reduced despite the circuit mounting portion being molded.
Furthermore, since the primary circuit mounting portion and the secondary circuit mounting portion are arranged at positions that do not overlap with the primary side air core inductor and the secondary side air core inductor, respectively, in plan view, the primary mold and the secondary mold can be made thin. It is also possible to reduce the thickness of the composite transformer module in which they are assembled.
請求項２に係る発明によれば、請求項１に係る発明の複合トランスモジュールによる効果に加え、一次モールドと二次モールドの接合面に、互いに嵌合する凹部及び凸部が設けられているので、一次モールドと二次モールドを組み重ねた後にそれらがずれることがない。 According to the invention according to claim 2, in addition to the effect of the composite transformer module of the invention according to claim 1, the joint surface of the primary mold and the secondary mold is provided with the recesses and the protrusions that fit each other. After the primary mold and the secondary mold are assembled, they do not shift.
請求項３に係る発明によれば、請求項２に係る発明の複合トランスモジュールによる効果に加え、少なくとも一次側空心部の中心付近より先端側及び二次側空心部の中心付近より先端側が、それぞれ他の部分より薄い薄肉部となっており、少なくとも薄肉部の一次側空心部の中心付近より先端側及び前記二次側空心部の中心付近より先端側が接合面となっているので、複合トランスモジュールをより薄くすることができ、トランスファーモールド時におけるモールド樹脂の量をさらに減らすことができる。 According to the invention according to claim 3 , in addition to the effect of the composite transformer module of the invention according to claim 2 , at least the tip side from the vicinity of the center of the primary side air core and the tip side from the vicinity of the center of the secondary side air core are respectively Since the thin-walled portion is thinner than other portions, at least the front-end side from the vicinity of the center of the primary-side air core portion of the thin-walled portion and the front-end side from the vicinity of the center of the secondary-side air-core portion are joined surfaces. Can be made thinner, and the amount of mold resin during transfer molding can be further reduced.
以下、実施例によって本発明の実施形態を説明する。 Hereinafter, embodiments of the present invention will be described by way of examples.
実施例の複合トランスモジュールは、図１〜３に示すように一次モールド２と二次モールド３を有し、これらを上下に組み重ねた後コア材を固定してなるものである。 The composite transformer module according to the embodiment has a primary mold 2 and a secondary mold 3 as shown in FIGS. 1 to 3, and these are assembled together and fixed with a core material.
一次モールド２は一次回路搭載部と一次側空心インダクターを同一平面上に隣接して配置するとともに、図１〜３に示すように一次回路搭載部を厚く一次側空心インダクターを薄くモールドした一次側モールド体４と、一次回路搭載部と電気的に接続されている一次側リード部５とを有し、図２及び３に示すように薄くモールドされた一次側空心インダクターの一次側空心部の中心付近はモールドされずに一次側コア穴６となっている。
そして、一次側モールド体４の先端部には図２に示すように一次側ほぞ７が形成され、一次側モールド体４の厚い部分（以下「一次側厚肉部」という。）と薄い部分（以下「一次側薄肉部」という。）との境界部にあたる一次側段差面には図３に示すように一次側アリ溝８が形成されている。
The primary mold 2 has a primary circuit mounting portion and a primary air core inductor arranged adjacent to each other on the same plane, and a primary side mold in which the primary circuit mounting portion is thick and the primary air core inductor is thinly molded as shown in FIGS. Near the center of the primary side air-core part of the primary-side air-core inductor having a body 4 and a primary-side lead part 5 electrically connected to the primary circuit mounting part and thinly molded as shown in FIGS. The primary core hole 6 is not molded.
As shown in FIG. 2, a primary tenon 7 is formed at the tip of the primary side mold body 4, and a thick part (hereinafter referred to as “primary side thick part”) and a thin part (hereinafter referred to as “primary side thick part”). The primary side dovetail groove 8 is formed on the primary side step surface corresponding to the boundary with the “primary side thin portion” as shown in FIG.
二次モールド３は二次回路搭載部と二次側空心インダクターを同一平面上に隣接して配置するとともに、図１〜３に示すように二次回路搭載部を厚く二次側空心インダクターを薄くモールドした二次側モールド体９と、二次回路搭載部と電気的に接続されている二次側リード部１０と、放熱フィン１４とを有し、図２及び３に示すように薄くモールドされた二次側空心インダクターの二次側空心部の中心付近はモールドされずに二次側コア穴１１となっている。
そして、二次側モールド体９の先端部には図２に示すように二次側ほぞ１２が形成され、二次側モールド体９の厚い部分（以下「二次側厚肉部」という。）と薄い部分（以下「二次側薄肉部」という。）との境界部にあたる二次側段差面には図２に示すように二次側アリ溝１３が形成されている。
なお、放熱フィン１４は、二次側モールド体９の側面から突出させたものであり、二次回路搭載部で発生した熱が外部に放出され易くなっているし、外部回路との電気的接続にも使用することができる。
In the secondary mold 3, the secondary circuit mounting portion and the secondary side air core inductor are arranged adjacent to each other on the same plane, and the secondary circuit mounting portion is thickened and the secondary side air core inductor is thinned as shown in FIGS. It has a molded secondary side molded body 9, a secondary side lead portion 10 electrically connected to the secondary circuit mounting portion, and a heat radiation fin 14, and is molded thinly as shown in FIGS. Further, the vicinity of the center of the secondary side air core portion of the secondary side air core inductor is not molded but forms a secondary side core hole 11.
And the secondary side tenon 12 is formed in the front-end | tip part of the secondary side mold body 9 as shown in FIG. 2, and the thick part (henceforth "secondary side thick part") of the secondary side mold body 9 is formed. As shown in FIG. 2, a secondary dovetail groove 13 is formed on the secondary stepped surface corresponding to the boundary between the thin part and the thin part (hereinafter referred to as “secondary thin part”).
The radiating fins 14 are protruded from the side surfaces of the secondary side mold body 9, and heat generated in the secondary circuit mounting portion is easily released to the outside, and electrical connection with an external circuit is made. Can also be used.
一次モールド２と二次モールド３を上下に組み重ねて複合トランスモジュール１を組み立てるに際しては、図１に示すように一次側ほぞ７及び二次側ほぞ１２を、それぞれ二次側アリ溝１３及び一次側アリ溝８に合致させた後に滑り込ませて、一次側モールド体４の薄い部分と二次側モールド体９の薄い部分とを接合させる。
その後、中央部に円柱状部を有し、円柱状部の中心軸を含む平面で切った断面がＥ字状のコア材１５を２つ用意して、一次モールド２の一次側コア穴６の上方と二次モールド３の二次側コア穴１１の下方に配置し、各々の円柱状部を一次側コア穴６及び二次側コア穴１１に貫通させた後に２つのコア材を固定する。
When assembling the composite transformer module 1 by vertically assembling the primary mold 2 and the secondary mold 3, as shown in FIG. 1, the primary side tenon 7 and the secondary side tenon 12, respectively the secondary side dovetail groove 13 and the primary side groove 13 The thin part of the primary side mold body 4 and the thin part of the secondary side mold body 9 are joined by sliding after making it match with the side dovetail groove 8.
Thereafter, two core materials 15 having a columnar part at the center and having a cross section cut by a plane including the central axis of the columnar part are prepared, and the primary core hole 6 of the primary mold 2 is formed. It arrange | positions under the secondary side core hole 11 of the upper side and the secondary mold 3, and after making each cylindrical part penetrate the primary side core hole 6 and the secondary side core hole 11, two core materials are fixed.
このようにして完成した複合トランスモジュール１の側面図及び平面図を、それぞれ図４及び図５に示すが、一次側薄肉部と二次側薄肉部を合わせた厚み、一次側厚肉部の厚み及び二次側厚肉部の厚みが全て同一となるようにしてあるので、一次側モールド体４と二次側モールド体９を組み重ねた後におけるモールド部の形状は薄い直方体状となる。
また、放熱フィン１４は二次側モールド体９の外側で折り曲げてあるが、その下端面は一次側リード部５及び二次側リード部１０の下端面とほぼ面一となるようにしてある。
なお、図６は本発明の回路構成を示すブロック図である。
The side view and plan view of the composite transformer module 1 thus completed are shown in FIGS. 4 and 5, respectively. The thickness of the primary side thin part and the secondary side thin part, the thickness of the primary side thick part In addition, since the thickness of the secondary side thick part is all the same, the shape of the mold part after the primary side mold body 4 and the secondary side mold body 9 are assembled is a thin rectangular parallelepiped shape.
Further, the heat radiating fins 14 are bent outside the secondary side mold body 9, but their lower end surfaces are substantially flush with the lower end surfaces of the primary side lead part 5 and the secondary side lead part 10.
FIG. 6 is a block diagram showing the circuit configuration of the present invention.
実施例の一次モールド２及び二次モールド３を製造するに際しては、図７に示すように、一枚の金属板を打ち抜き、渦巻き状の一次側空心インダクター１７、一次回路を搭載するための一次回路搭載部１８、一次側リード部５、渦巻き状の二次側空心インダクター２０、二次回路を搭載するための二次回路搭載部２１、放熱フィン１４及び二次側リード部１０が保持されるようにした金属フレーム１６を用意する。 When manufacturing the primary mold 2 and the secondary mold 3 of the embodiment, as shown in FIG. 7, a primary circuit for punching a single metal plate and mounting the spiral primary air core inductor 17 and the primary circuit is provided. The mounting portion 18, the primary side lead portion 5, the spiral secondary air core inductor 20, the secondary circuit mounting portion 21 for mounting the secondary circuit, the radiation fins 14, and the secondary side lead portion 10 are held. A metal frame 16 is prepared.
次に、一次回路搭載部１８及び二次回路搭載部２１に回路部品を実装した後、一次側空心インダクター１７と一次回路搭載部１８及び二次側空心インダクター２０と二次回路搭載部２１に、それぞれ一次側用型枠及び二次側用型枠（図示せず）をセットし、一次側空心部１９の中心付近と二次側空心部２２の中心付近を除く部分にモールド樹脂を流し込んで一体的にモールドする。
そして、樹脂が固まった後に一次側用型枠及び二次側用型枠を取り除き、それぞれを金属フレーム１６から切り離せば一次モールド２及び二次モールド３が得られる。
Next, after circuit components are mounted on the primary circuit mounting portion 18 and the secondary circuit mounting portion 21, the primary side air core inductor 17, the primary circuit mounting portion 18, the secondary side air core inductor 20, and the secondary circuit mounting portion 21 are A primary side mold and a secondary side mold (not shown) are set, respectively, and a mold resin is poured into a portion excluding the vicinity of the center of the primary air core 19 and the vicinity of the center of the secondary air core 22 to integrate them. To mold.
Then, the primary mold 2 and the secondary mold 3 are obtained by removing the primary mold and the secondary mold and separating them from the metal frame 16 after the resin is solidified.
実施例の変形例を列記する。
（１）実施例においては、一次側空心インダクター１７及び二次側空心インダクター２０の部分を薄くモールドしたが、一次回路搭載部１８及び二次回路搭載部２１も搭載する回路部品に応じて薄くできれば、全体を薄くモールドし一次側コア穴６と二次側コア穴１１を合致させてコア材の柱状部を貫通させ固定しても良い。
そうした場合、一次回路搭載部１８と二次回路搭載部２１との位置は自由に設定できるが、一次回路搭載部１８を二次回路搭載部２１の直上に位置させれば、複合トランスモジュールの長さを短くすることができる。
（２）実施例においては、一次回路搭載部及び二次回路搭載部は、それぞれ一次側空心インダクター及び二次側空心インダクターと同一平面上に隣接して配置したが、一次回路搭載部及び二次回路搭載部は、それぞれ前記一次側空心インダクター及び前記二次側空心インダクターと平面視において重ならない位置に配置されていれば良い。
例えば、一次回路搭載部及び二次回路搭載部を、それぞれ一次側空心インダクター及び二次側空心インダクターの外側で直交するように配置した場合、一次モールド及び二次モールドは断面がＬ字状となり、これらを組み重ねると断面がコ字状の薄い複合トランスモジュールを得ることができる。
そして、このような形状の複合トランスモジュールはコ字状の凹部や壁面に沿って設置することができる。
（３）実施例においては、一次側モールド体４に一次側ほぞ７及び一次側アリ溝８を形成し、二次側モールド体９に二次側ほぞ１２及び二次側アリ溝１３を形成し、２つのモールド体を上下方向にスライドさせて接合したが、一次側ほぞ７と二次側アリ溝１３のみ又は一次側アリ溝８と二次側ほぞ１２のみを形成しても良いし、いずれかの接合面の前後方向又は左右方向に延びるほぞとアリ溝を形成し、２つのモールド体を前後方向又は左右方向にスライドさせて接合するようにしても良く、ほぞとアリ溝に代えて単純な直方体形状の突条と溝条としても良い。
また、一次側モールド体４の先端面と二次側段差面との接合部、二次側モールド体９の先端面と一次側段差面との接合部、及び一次側薄肉部の下面と二次側薄肉部の上面との接合部において、いずれかの箇所に互いに嵌合する凸部と凹部を設けても良い。
さらに、先端面と段差面との接合部の一方に凸部と凹部又は前後方向に延びる突条と溝条を設けるとともに、その凸部と凹部又は突条と溝条を嵌合させた状態で互いに嵌合可能な凸部と凹部又は突条と溝条を薄肉部同士の接合部に設ければ、少なくとも２つの方向へのずれが防止できるのでより良い。
The modification of an Example is listed.
(1) In the embodiment, the primary side air core inductor 17 and the secondary side air core inductor 20 are thinly molded. However, if the primary circuit mounting portion 18 and the secondary circuit mounting portion 21 can also be made thin according to the circuit components to be mounted. Alternatively, the whole may be molded thinly, the primary side core hole 6 and the secondary side core hole 11 may be matched, and the columnar portion of the core material may be penetrated and fixed.
In such a case, the positions of the primary circuit mounting portion 18 and the secondary circuit mounting portion 21 can be freely set. However, if the primary circuit mounting portion 18 is positioned immediately above the secondary circuit mounting portion 21, the length of the composite transformer module is increased. The length can be shortened.
(2) In the embodiment, the primary circuit mounting portion and the secondary circuit mounting portion are arranged adjacent to each other on the same plane as the primary side air core inductor and the secondary side air core inductor, respectively. The circuit mounting portions may be arranged at positions that do not overlap with the primary side air-core inductor and the secondary side air-core inductor in plan view, respectively.
For example, when the primary circuit mounting part and the secondary circuit mounting part are arranged so as to be orthogonal to the outside of the primary side air core inductor and the secondary side air core inductor, respectively, the cross section of the primary mold and the secondary mold is L-shaped, When these are assembled, a thin composite transformer module having a U-shaped cross section can be obtained.
And the composite transformer module of such a shape can be installed along a U-shaped recessed part and a wall surface.
(3) In the embodiment, the primary side tenon 7 and the primary side dovetail groove 8 are formed in the primary side mold body 4, and the secondary side tenon 12 and the secondary side dovetail groove 13 are formed in the secondary side mold body 9. Although two mold bodies were slid in the vertical direction and joined, only the primary side tenon 7 and the secondary side dovetail groove 13 or only the primary side dovetail groove 8 and the secondary side tenon 12 may be formed. A tenon and a dovetail groove extending in the front-rear direction or the left-right direction of the joint surface may be formed, and the two mold bodies may be joined by sliding in the front-rear direction or the left-right direction. A rectangular parallelepiped-shaped protrusion and groove may be used.
Further, the joint between the tip surface of the primary mold body 4 and the secondary step surface, the joint between the tip surface of the secondary mold body 9 and the primary step surface, and the lower surface and secondary of the primary thin portion In the joint portion with the upper surface of the side thin portion, a convex portion and a concave portion that are fitted to each other may be provided at any location.
Furthermore, while providing a convex part and a recessed part or the protrusion and groove | channel which extend in the front-back direction in one side of the junction part of a front end surface and a level | step difference surface, the state which fitted the convex part and the recessed part or the protrusion and the groove line Providing convex portions and concave portions or protrusions and grooves that can be fitted to each other at the joint portion between the thin portions is better because displacement in at least two directions can be prevented.
（４）実施例においては、一次側モールド体４の先端部と二次側段差面、二次側モールド体９の先端部と一次側段差面及び一次側薄肉部の下面と二次側薄肉部の上面を接合させたが、一次側モールド体４の先端部と二次側段差面及び二次側モールド体９の先端部と一次側段差面は接合させなくても良い。
また、実施例においては、一次側空心インダクター１７及び二次側空心インダクター２０の部分を薄くモールドしたが、少なくともコア材の円柱状部が貫通する一次側コア穴６及び二次側コア穴１１より先端側が他の部分より薄くモールドされていれば、その下面と上面を接合させることで複合トランスモジュールの厚みを薄くすることができる。
（５）実施例においては、一次側モールド体４の先端部と二次側段差面、二次側モールド体９の先端部と一次側段差面及び一次側薄肉部の下面と二次側薄肉部の上面を接合させたが、一次側モールド体４と二次側モールド体９を直交させて、一次側モールド体４の先端側の側面部と二次側段差面及び二次側モールド体９の先端側の側面部と一次側段差面とを接合させても良い。
また、その場合でも変形例（４）と同様に、一次側モールド体４の先端側の側面部と二次側段差面及び二次側モールド体９の先端側の側面部と一次側段差面とを接合させず、一次側薄肉部の下面と二次側薄肉部の上面だけを接合させても良い。
（６）実施例においては、一次側モールド体４の先端部と二次側段差面、二次側モールド体９の先端部と一次側段差面及び一次側薄肉部の下面と二次側薄肉部の上面を接合させたが、一次側モールド体４の上面と二次側モールド体９の下面を接合させても良い。
特に、一次側モールド体４と二次側モールド体９を図８に示すような配置とし、一次側薄肉部と二次側薄肉部の周囲にコア材を固定させれば、よりコンパクトな複合トランスモジュールとなり、立てて実装すれば実装面積を大幅に減らすことができる。
(4) In Example, the front-end | tip part and secondary side level | step difference surface of the primary side mold body 4, the front-end | tip part and primary side level | step difference surface of the secondary side mold body 9, and the lower surface of a primary side thin part, and a secondary side thin part However, it is not necessary to join the front end portion and the secondary stepped surface of the primary mold body 4 and the front end portion of the secondary mold body 9 and the primary stepped surface.
In the embodiment, the primary air core inductor 17 and the secondary air core inductor 20 are thinly molded, but at least from the primary core hole 6 and the secondary core hole 11 through which the cylindrical portion of the core material passes. If the tip side is molded thinner than other parts, the thickness of the composite transformer module can be reduced by joining the lower surface and the upper surface.
(5) In Example, the front-end | tip part and secondary side level | step difference surface of the primary side mold body 4, the front-end | tip part and primary side level | step difference surface of the secondary side mold body 9, and the lower surface of a primary side thin part, and a secondary side thin part The primary side mold body 4 and the secondary side mold body 9 are orthogonally crossed so that the side surface portion on the tip side of the primary side mold body 4, the secondary side step surface, and the secondary side mold body 9 You may join the side part by the side of a front end, and a primary side level | step difference surface.
Even in that case, similarly to the modification (4), the side surface portion and the secondary side step surface of the primary side mold body 4 and the side surface portion and the primary side step surface of the secondary side mold body 9 are provided. Alternatively, only the lower surface of the primary thin portion and the upper surface of the secondary thin portion may be joined.
(6) In Example, the front-end | tip part and secondary side level | step difference surface of the primary side mold body 4, the front-end | tip part and primary side level | step difference surface of the secondary side mold body 9, and the lower surface of a primary side thin part, and a secondary side thin part However, the upper surface of the primary mold body 4 and the lower surface of the secondary mold body 9 may be bonded together.
In particular, if the primary side mold body 4 and the secondary side mold body 9 are arranged as shown in FIG. 8 and the core material is fixed around the primary side thin part and the secondary side thin part, a more compact composite transformer. If it becomes a module and is mounted upright, the mounting area can be greatly reduced.
（７）実施例においては、断面がＥ字状のコア材１５を２つ用い、各々の円柱状部を一次側コア穴６及び二次側コア穴１１に貫通させて固定したが、一次側コア穴６及び二次側コア穴１１を繋いだ長さ以上の円柱状部を有するＥ字状のコア材と、その３つの柱状部にまたがる長さの平板状のコア材を用いても良く、一次側コア穴６及び二次側コア穴１１を繋いだ穴の内部に挿入できる１本の柱状コア材や一次側コア穴６及び二次側コア穴１１に挿入できる柱状部を有するＴ字状、Ｌ字状又はＵ字状のコア材を１つ又は２つ用いても良い。
（８）実施例においては、一次モールド２と二次モールド３を１つずつ用いたが、二次モールド３は複数用いても良い。
そうした場合、複数の二次モールド３は一次モールド２の両側に配置しても良いし、片側に配置しても良い。
（９）実施例においては、一次側空心インダクター１７及び二次側空心インダクター２０を金属板を渦巻き状に打ち抜いて形成したが、別途製作された平面状のコイルを用いても良いし、特許文献２に記載されているような複数巻の空芯コイルを用いても良い。
（１０）実施例においては、一枚の金属板を打ち抜き、渦巻き状の一次側空心インダクター１７、一次回路を搭載するための一次回路搭載部１８、一次側リード部５、渦巻き状の二次側空心インダクター２０、二次回路を搭載するための二次回路搭載部２１、放熱フィン１４及び二次側リード部１０が保持されるようにした金属フレーム１６を用いたが、樹脂基板に、渦巻き状の一次側空心インダクター部、一次回路搭載部、一次側リード接続部、渦巻き状の二次側空心インダクター部、二次回路搭載部、放熱フィン及び二次側リード接続部の導体パターンをプリントした樹脂フレームを用いても良い。
そうした場合、一次側空心インダクター部、一次回路搭載部、一次側リード接続部、二次側空心インダクター部、二次回路搭載部、二次側リード接続部は、樹脂基板の両側に形成することができるので、集積度と設計自由度を上げることができる。
(7) In the example, two core materials 15 having an E-shaped cross section were used, and each columnar portion was fixed by passing through the primary side core hole 6 and the secondary side core hole 11. You may use the E-shaped core material which has the column-shaped part more than the length which connected the core hole 6 and the secondary side core hole 11, and the flat plate-shaped core material of the length spanning the three columnar parts. A T-shape having a single columnar core material that can be inserted into a hole connecting the primary side core hole 6 and the secondary side core hole 11 and a columnar part that can be inserted into the primary side core hole 6 and the secondary side core hole 11. One, or two, L-shaped, L-shaped or U-shaped core materials may be used.
(8) In the embodiment, one primary mold 2 and one secondary mold 3 are used, but a plurality of secondary molds 3 may be used.
In such a case, the plurality of secondary molds 3 may be arranged on both sides of the primary mold 2 or may be arranged on one side.
(9) In the embodiment, the primary side air-core inductor 17 and the secondary side air-core inductor 20 are formed by punching a metal plate in a spiral shape, but a planar coil manufactured separately may be used. A plurality of winding air-core coils as described in 2 may be used.
(10) In the embodiment, a single metal plate is punched out, the spiral primary air core inductor 17, the primary circuit mounting portion 18 for mounting the primary circuit, the primary lead portion 5, the spiral secondary side Although the air core inductor 20, the secondary circuit mounting portion 21 for mounting the secondary circuit, the metal frame 16 in which the heat radiating fins 14 and the secondary side lead portions 10 are held are used, the resin substrate has a spiral shape. Resin printed with the conductor pattern of the primary side air core inductor part, primary circuit mounting part, primary side lead connection part, spiral secondary air core inductor part, secondary circuit mounting part, radiating fin and secondary side lead connection part A frame may be used.
In such a case, the primary side air-core inductor part, the primary circuit mounting part, the primary side lead connection part, the secondary side air core inductor part, the secondary circuit mounting part, and the secondary side lead connection part may be formed on both sides of the resin substrate. As a result, the degree of integration and the degree of design freedom can be increased.
１ 複合トランスモジュール ２ 一次モールド ３ 二次モールド
４ 一次側モールド体 ５ 一次側リード部 ６ 一次側コア穴
７ 一次側ほぞ ８ 一次側アリ溝 ９ 二次側モールド体
１０ 二次側リード部 １１ 二次側コア穴 １２ 二次側ほぞ
１３ 二次側アリ溝 １４ 放熱フィン １５ コア材
１６ 金属フレーム １７ 一次側空心インダクター １８ 一次回路搭載部
１９ 一次側空心部 ２０ 二次側空心インダクター ２１ 二次回路搭載部
２２ 二次側空心部
DESCRIPTION OF SYMBOLS 1 Composite transformer module 2 Primary mold 3 Secondary mold 4 Primary side mold body 5 Primary side lead part 6 Primary side core hole 7 Primary side tenon 8 Primary side dovetail groove 9 Secondary side mold body 10 Secondary side lead part 11 Secondary Side core hole 12 Secondary tenon 13 Secondary dovetail 14 Radiation fin 15 Core material 16 Metal frame 17 Primary air core inductor 18 Primary circuit mounting portion 19 Primary air core portion 20 Secondary air core inductor 21 Secondary circuit mounting portion 22 Secondary air core
Claims (3)
二次回路を搭載した二次回路搭載部及び二次側空心インダクターを有し、
前記一次回路搭載部及び前記二次回路搭載部は、それぞれ前記一次側空心インダクター及び前記二次側空心インダクターと平面視において重ならない位置に配置されており、
前記一次回路搭載部と前記一次側空心インダクターは一次側空心部の中心付近を除き一体的に樹脂モールドされて一次モールドを形成し、
前記二次回路搭載部と前記二次側空心インダクターは二次側空心部の中心付近を除き一体的に樹脂モールドされて二次モールドを形成しており、
前記一次モールドと前記二次モールドを積み重ねた積層体の前記一次側空心部と前記二次側空心部の中心付近をコア材の柱状部が貫通している
ことを特徴とする複合トランスモジュール。 A primary circuit mounting portion and a primary side air-core inductor mounted with a primary circuit;
It has a secondary circuit mounting part and a secondary side air-core inductor with a secondary circuit,
The primary circuit mounting portion and the secondary circuit mounting portion are disposed at positions that do not overlap with the primary side air-core inductor and the secondary side air-core inductor, respectively, in plan view,
The primary circuit mounting portion and the primary side air-core inductor are integrally resin-molded except for the vicinity of the center of the primary side air-core portion to form a primary mold,
The secondary circuit mounting portion and the secondary side air-core inductor are integrally resin-molded except for the vicinity of the center of the secondary side air-core portion to form a secondary mold,
A composite transformer module, wherein a columnar portion of a core material passes through the vicinity of the center of the primary side air core portion and the secondary side air core portion of the laminate in which the primary mold and the secondary mold are stacked.
ことを特徴とする請求項１に記載の複合トランスモジュール。 2. The composite transformer module according to claim 1, wherein a concave portion and a convex portion that are fitted to each other are provided on a joint surface between the primary mold and the secondary mold.
少なくとも該薄肉部の前記一次側空心部の中心付近より先端側及び前記二次側空心部の中心付近より先端側が前記接合面となっている
ことを特徴とする請求項２に記載の複合トランスモジュール。 At least the tip side from the vicinity of the center of the primary side air core part and the tip side from the vicinity of the center of the secondary side air core part are each a thin part thinner than the other parts,
3. The composite transformer module according to claim 2 , wherein at least the front end side of the thin-walled portion from the vicinity of the center of the primary side air-core portion and the front-end side from the vicinity of the center of the secondary-side air core portion serve as the joint surface. .
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