JP2007273821A - Coil component, and its manufacturing method - Google Patents

Coil component, and its manufacturing method Download PDF

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Publication number
JP2007273821A
JP2007273821A JP2006098831A JP2006098831A JP2007273821A JP 2007273821 A JP2007273821 A JP 2007273821A JP 2006098831 A JP2006098831 A JP 2006098831A JP 2006098831 A JP2006098831 A JP 2006098831A JP 2007273821 A JP2007273821 A JP 2007273821A
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Japan
Prior art keywords
magnetic core
adhesive
coil component
columnar
forming member
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Pending
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JP2006098831A
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Japanese (ja)
Inventor
Koji Nakajima
浩二 中嶋
Tomio Marui
富夫 丸井
Toshiyuki Nakada
俊之 中田
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Panasonic Holdings Corp
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Matsushita Electric Industrial Co Ltd
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Priority to JP2006098831A priority Critical patent/JP2007273821A/en
Publication of JP2007273821A publication Critical patent/JP2007273821A/en
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  • Manufacturing Cores, Coils, And Magnets (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the number of coil components in each of which a gap space is formed between magnetic cores. <P>SOLUTION: The coil component includes a winding bobbin 5 having a through hole, a magnetic core 6a whose part is inserted from one side of the winding bobbin 5 into the through hole, a magnetic core 6b whose part is inserted from the other side of the winding bobbin 5 into the through hole. The magnetic core 6a and 6b are bonded with a pillar-like bond 7 to compose the coil component. Bonding the magnetic cores 6a, 6b with a bond allows the coil component to form a gap space between the magnetic cores 6a, 6b without preparing other component, such as a gap spacer. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、各種電子機器におけるスイッチング電源に用いられるコイル部品とその製造方法に関するものである。   The present invention relates to a coil component used for a switching power supply in various electronic devices and a manufacturing method thereof.

従来、この種のコイル部品は、図４に示すごとく、貫通孔１ａを有する巻軸１にその上方及び下方から、磁心２ａ、磁心２ｂを組み込み、図５に示すようなコイル部品を形成する。その際、図４に示すごとく、磁心２ａと磁心２ｂにおける互いに対向する脚の先端には、互いを接着するための接着剤３を設けるとともに、磁気飽和を防ぐためのギャップスペーサ４を介在させていた。   Conventionally, as shown in FIG. 4, this type of coil component incorporates a magnetic core 2a and a magnetic core 2b from above and below a winding shaft 1 having a through hole 1a to form a coil component as shown in FIG. At that time, as shown in FIG. 4, an adhesive 3 for adhering each other is provided at the tips of the opposing legs of the magnetic core 2a and the magnetic core 2b, and a gap spacer 4 for preventing magnetic saturation is interposed. It was.

なお、この出願に関する先行技術文献情報としては、例えば、特許文献１が知られている。
特開２００２−３５３０４６号公報 As prior art document information relating to this application, for example, Patent Document 1 is known.
JP 2002-353046 A

上記従来例に示すようなコイル部品は、部品点数が多いことが問題となっていた。   The coil parts as shown in the conventional example have a problem that the number of parts is large.

すなわち、上記従来のようなギャップスペーサ４を磁心２ａと磁心２ｂとの間に介在させる構成においては、ギャップスペーサ４を設ける分、部品点数が多くなってしまうことが問題となっていた。   That is, in the configuration in which the gap spacer 4 as described above is interposed between the magnetic core 2a and the magnetic core 2b, there is a problem that the number of parts increases as the gap spacer 4 is provided.

そこで本発明は、磁心間にギャップスペースを設けたコイル部品において、その部品点数を低減させることを目的とする。   Accordingly, an object of the present invention is to reduce the number of components in a coil component in which a gap space is provided between magnetic cores.

そして、この目的を達成するために本発明は、前記第１の磁心と前記第２の磁心とを柱状接着剤にて接着させたコイル部品としたものである。   In order to achieve this object, the present invention provides a coil component in which the first magnetic core and the second magnetic core are bonded with a columnar adhesive.

本発明のコイル部品は、前記第１の磁心と前記第２の磁心とを柱状接着剤にて接着させることにより、ギャップスペーサを設けることなく磁心間にギャップスペースを設けることができ、その部品点数を低減することができる。   In the coil component of the present invention, a gap space can be provided between the magnetic cores without providing a gap spacer by bonding the first magnetic core and the second magnetic core with a columnar adhesive. Can be reduced.

（実施の形態１）
以下、本発明の実施の形態１におけるコイル部品について図面を参照しながら説明する。 (Embodiment 1)
Hereinafter, the coil component in Embodiment 1 of this invention is demonstrated, referring drawings.

図１、図２に示すごとく、貫通孔５ａを有する巻軸５には、磁心６ａ、磁心６ｂの一部を挿入しており、この磁心６ａ、６ｂ間を柱状接着剤７により接着し、コイル部品を構成している。   As shown in FIGS. 1 and 2, a part of the magnetic core 6a and the magnetic core 6b is inserted into the winding shaft 5 having the through hole 5a, and the magnetic cores 6a and 6b are bonded to each other by a columnar adhesive 7 to form a coil. Consists of parts.

このように、磁心６ａ，６ｂ間を柱状接着剤７により接着させることにより、ギャップスペーサ等の他の部品を設けることなく磁心６ａ，６ｂ間にギャップスペースを設けることができ、その部品点数を低減することができる。   Thus, by adhering the magnetic cores 6a and 6b with the columnar adhesive 7, it is possible to provide a gap space between the magnetic cores 6a and 6b without providing other parts such as a gap spacer, thereby reducing the number of parts. can do.

次に、このコイル部品の製造方法について説明する。   Next, the manufacturing method of this coil component is demonstrated.

まず、図２に示すごとく磁心６ｂにおける磁心６ａと対向する脚の先端に接着剤７ａを塗布するとともに、当該対向する脚の先端における接着剤７ａ非形成部の一部に柱状接着剤形成部材８を載置しておく。   First, as shown in FIG. 2, the adhesive 7a is applied to the tip of the leg of the magnetic core 6b facing the magnetic core 6a, and the columnar adhesive forming member 8 is applied to a part of the adhesive 7a non-forming portion at the tip of the facing leg. Is placed.

ここで、例えば接着剤７ａには熱硬化性樹脂などを用いることができる。以下、熱硬化性樹脂を用いた場合を例に取り説明する。   Here, for example, a thermosetting resin or the like can be used for the adhesive 7a. Hereinafter, the case where a thermosetting resin is used will be described as an example.

なお、接着剤７ａの熱膨張係数を柱状接着剤形成部材８の熱膨張係数よりも小さいものを用いることが望ましい。後の工程における、柱状接着剤形成部材８の引き抜きのためである。例えば柱状接着剤形成部材８にテフロン（登録商標）を用いた場合、接着剤７ａにはエポキシ接着剤を用いる。また、柱状接着剤形成部材８にテフロン（登録商標）を用いると、摩擦係数が少ないため、より後の工程において、引き抜きやすく望ましい。   In addition, it is desirable to use the adhesive 7a having a thermal expansion coefficient smaller than that of the columnar adhesive forming member 8. This is for pulling out the columnar adhesive forming member 8 in a later step. For example, when Teflon (registered trademark) is used for the columnar adhesive forming member 8, an epoxy adhesive is used for the adhesive 7a. Further, when Teflon (registered trademark) is used for the columnar adhesive forming member 8, it is desirable that it is easy to pull out in a later process because the coefficient of friction is small.

次に、図３に示すごとく、磁心６ａの中脚と磁心６ｂの中脚とを巻軸５に設けた貫通孔に挿入し、加熱する。その際、接着剤７ａは未硬化状態であるため、柱状接着剤形成部材８の熱膨張に引き伸ばされ柱状となる。   Next, as shown in FIG. 3, the middle leg of the magnetic core 6a and the middle leg of the magnetic core 6b are inserted into the through holes provided in the winding shaft 5 and heated. At this time, since the adhesive 7a is in an uncured state, the adhesive 7a is stretched by the thermal expansion of the columnar adhesive forming member 8 and becomes columnar.

その後、接着剤７ａが硬化し、柱状接着剤７となった状態で加熱を止める。そうすると、上述のとおり、接着剤７ａの熱膨張係数よりも低い熱膨張係数を有する材料を用いた柱状接着剤形成部材８は、温度の低下に伴い柱状接着剤７の高さよりもその厚みが薄くなる。   Thereafter, the heating is stopped in a state where the adhesive 7 a is cured and becomes the columnar adhesive 7. Then, as described above, the thickness of the columnar adhesive forming member 8 using a material having a thermal expansion coefficient lower than that of the adhesive 7a is thinner than the height of the columnar adhesive 7 as the temperature decreases. Become.

次に、この柱状接着剤形成部材８を矢印の方向に引き抜くことで、図１に示すような、磁心６ａ，６ｂ間に柱状接着剤７を形成したコイル部品を製造することができる。   Next, by pulling out the columnar adhesive forming member 8 in the direction of the arrow, a coil component in which the columnar adhesive 7 is formed between the magnetic cores 6a and 6b as shown in FIG. 1 can be manufactured.

なお、柱状接着剤７は上述のごとく柱状接着剤形成部材８の熱膨張により硬化前に上方へと引っ張られ、その結果としてその長手方向の中央部は上下（磁心６ａ，６ｂ接着部）よりも半径が小さく、いわゆる鼓状となっている。   As described above, the columnar adhesive 7 is pulled upward by the thermal expansion of the columnar adhesive forming member 8 before curing, and as a result, the central portion in the longitudinal direction is higher than the upper and lower sides (magnetic cores 6a and 6b bonding portions). The radius is small, so-called drum shape.

本発明のコイル部品は、部品点数を低減することができるという効果を有し、各種電気機器におけるスイッチング電源において有用である。   The coil component of the present invention has an effect that the number of components can be reduced, and is useful in a switching power supply in various electric devices.

本発明の実施の形態１におけるコイル部品の斜視図The perspective view of the coil components in Embodiment 1 of this invention 本発明の実施の形態１におけるコイル部品の分解斜視図1 is an exploded perspective view of a coil component according to Embodiment 1 of the present invention. 本発明の実施の形態１におけるコイル部品の製造工程を示す斜視図The perspective view which shows the manufacturing process of the coil components in Embodiment 1 of this invention. 従来のコイル部品の分解斜視図An exploded perspective view of a conventional coil component 従来のコイル部品の斜視図Perspective view of conventional coil parts

符号の説明Explanation of symbols

５ 巻軸
６ａ 磁心
６ｂ 磁心
７ 柱状接着剤 5 winding axis 6a magnetic core 6b magnetic core 7 columnar adhesive

Claims (5)

貫通孔を有する巻軸と、
この巻軸の一端側から前記貫通孔にその一部が挿入された第１の磁心と、
この第１の磁心に対向して設けた第２の磁心とを備え、
前記第１の磁心と前記第２の磁心とを柱状接着剤にて接着させたコイル部品。 A winding shaft having a through hole;
A first magnetic core partially inserted into the through hole from one end of the winding shaft;
A second magnetic core provided opposite to the first magnetic core,
A coil component in which the first magnetic core and the second magnetic core are bonded with a columnar adhesive. 接着剤は熱硬化性樹脂である請求項１に記載のコイル部品。 The coil component according to claim 1, wherein the adhesive is a thermosetting resin. 第１の磁心における第２の磁心対向部に接着剤を塗布するとともに、前記第２の磁心対向部における前記接着剤非形成部に柱状接着剤形成部材を載置し、次に前記第１の磁心の接着剤を第２の磁心と接触させ、その後、柱状接着剤形成部材を取り除くコイル部品の製造方法。 An adhesive is applied to the second magnetic core facing portion of the first magnetic core, and a columnar adhesive forming member is placed on the adhesive non-forming portion of the second magnetic core facing portion, and then the first magnetic core is mounted. A method for manufacturing a coil component, wherein a magnetic core adhesive is brought into contact with a second magnetic core, and then a columnar adhesive forming member is removed. 第１の磁心における第２の磁心対向部に熱硬化性樹脂を塗布するとともに、前記第２の磁心対向部における前記接着剤非形成部に柱状接着剤形成部材を載置し、次に前記第１の磁心の熱硬化性樹脂を第２の磁心と接触させ、その後加熱して熱硬化性樹脂を硬化させ、次に柱状接着剤形成部材を取り除くコイル部品の製造方法。 A thermosetting resin is applied to the second magnetic core facing portion of the first magnetic core, and a columnar adhesive forming member is placed on the adhesive non-forming portion of the second magnetic core facing portion. A method of manufacturing a coil component in which a thermosetting resin of one magnetic core is brought into contact with a second magnetic core and then heated to cure the thermosetting resin, and then the columnar adhesive forming member is removed. 熱硬化性樹脂の熱膨張係数を柱状接着剤形成部材の熱膨張係数よりも低くした請求項４に記載のコイル部品。 The coil component according to claim 4, wherein the thermal expansion coefficient of the thermosetting resin is lower than the thermal expansion coefficient of the columnar adhesive forming member.
JP2006098831A 2006-03-31 2006-03-31 Coil component, and its manufacturing method Pending JP2007273821A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009252834A (en) * 2008-04-02 2009-10-29 Sun Ace:Kk Coil member with frame, and method of manufacturing the same
CN103903836A (en) * 2014-03-19 2014-07-02 台达电子企业管理（上海）有限公司 Magnetic element and iron cores thereof

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51107464A (en) * 1975-03-17 1976-09-24 Nippon Telegraph & Telephone SENRINKUMITATEHOHO
JPS59168608A (en) * 1983-03-14 1984-09-22 Murata Mfg Co Ltd Manufacture of fly-back transformer
JPS6373905A (en) * 1986-09-17 1988-04-04 株式会社　ソノベ鞄製作所 Back protecting plate of knapsack
JPS63164409A (en) * 1986-12-26 1988-07-07 Matsushita Electric Ind Co Ltd Transformer
JPH02116705A (en) * 1988-10-27 1990-05-01 Kawasaki Steel Corp Measuring apparatus of thickness of coating film on coated plate material
JPH03235307A (en) * 1990-02-13 1991-10-21 Matsushita Electric Ind Co Ltd Transformer
JPH0851032A (en) * 1994-08-09 1996-02-20 Murata Mfg Co Ltd Coil and manufacture thereof
JPH1154333A (en) * 1997-07-30 1999-02-26 Tdk Corp Inductor ferrite core and chip inductor using the same
JP2001313222A (en) * 2000-04-28 2001-11-09 Toko Inc Inverter transformer
JP2003318036A (en) * 2002-04-19 2003-11-07 Matsushita Electric Ind Co Ltd Coil component and its manufacturing method
JP2005340812A (en) * 2004-05-21 2005-12-08 Minebea Co Ltd Coil structure and method of manufacturing the same

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51107464A (en) * 1975-03-17 1976-09-24 Nippon Telegraph & Telephone SENRINKUMITATEHOHO
JPS59168608A (en) * 1983-03-14 1984-09-22 Murata Mfg Co Ltd Manufacture of fly-back transformer
JPS6373905A (en) * 1986-09-17 1988-04-04 株式会社　ソノベ鞄製作所 Back protecting plate of knapsack
JPS63164409A (en) * 1986-12-26 1988-07-07 Matsushita Electric Ind Co Ltd Transformer
JPH02116705A (en) * 1988-10-27 1990-05-01 Kawasaki Steel Corp Measuring apparatus of thickness of coating film on coated plate material
JPH03235307A (en) * 1990-02-13 1991-10-21 Matsushita Electric Ind Co Ltd Transformer
JPH0851032A (en) * 1994-08-09 1996-02-20 Murata Mfg Co Ltd Coil and manufacture thereof
JPH1154333A (en) * 1997-07-30 1999-02-26 Tdk Corp Inductor ferrite core and chip inductor using the same
JP2001313222A (en) * 2000-04-28 2001-11-09 Toko Inc Inverter transformer
JP2003318036A (en) * 2002-04-19 2003-11-07 Matsushita Electric Ind Co Ltd Coil component and its manufacturing method
JP2005340812A (en) * 2004-05-21 2005-12-08 Minebea Co Ltd Coil structure and method of manufacturing the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009252834A (en) * 2008-04-02 2009-10-29 Sun Ace:Kk Coil member with frame, and method of manufacturing the same
CN103903836A (en) * 2014-03-19 2014-07-02 台达电子企业管理（上海）有限公司 Magnetic element and iron cores thereof

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