JP2005310812A - Coil component - Google Patents

Coil component Download PDF

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JP2005310812A
JP2005310812A JP2004121561A JP2004121561A JP2005310812A JP 2005310812 A JP2005310812 A JP 2005310812A JP 2004121561 A JP2004121561 A JP 2004121561A JP 2004121561 A JP2004121561 A JP 2004121561A JP 2005310812 A JP2005310812 A JP 2005310812A
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coil
lead wire
magnetic core
coil component
core
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JP4994579B2 (en
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Mutsuyasu Otsubo
睦泰 大坪
Kazuaki Onishi
一彰 大西
Tsuneji Imanishi
恒次 今西
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Panasonic Holdings Corp
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Matsushita Electric Industrial Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a coil component whose reliability is improved without integrating a drum core and a ring core with adhesive so that heat resistance of adhesive is not necessary to be considered, and suppressing disconnection of lead-out wires of a coil. <P>SOLUTION: The coil component is provided with a core 30 whose cross section is rectangular, coils 32 in which conductors are spirally wound and formed and which are embedded in the core 30 and terminals 34 which are electrically connected to the coils 32. The terminals 34 are provided with the lead-out wires 42 of the coils 32 which are projected from the core 30 and are bent toward a base from the side of the core 30 and holders 44 which are overlapped with the lead-out wires 42 and hold positions and shapes of the lead-out wires 42. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は各種電子機器、通信機器等に利用されるコイル部品に関するものである。   The present invention relates to a coil component used in various electronic devices, communication devices, and the like.

以下、従来の技術について図面を参照しながら説明する。   Hereinafter, a conventional technique will be described with reference to the drawings.

図７は自動車エンジンの燃料噴射装置を制御する制御システム全体を示すブロック図、図８は同制御システムの制御コントロール部における電源部の回路図、図９は同コイル部品の断面図、図１０は同電源部に用いる従来のコイル部品の斜視図である。   FIG. 7 is a block diagram showing the entire control system for controlling the fuel injection device of the automobile engine, FIG. 8 is a circuit diagram of the power supply unit in the control control unit of the control system, FIG. 9 is a sectional view of the coil components, and FIG. It is a perspective view of the conventional coil components used for the power supply part.

図７において、自動車エンジンの燃料噴射装置を制御する制御システムは、バッテリー１から駆動用の電流を供給された制御コントロール部２が、エンジンの燃料噴射装置３を制御している。制御コントロール部２には、燃料噴射装置の噴射量や噴射タイミングを計算・制御するＣＰＵ４と、このＣＰＵ４に電流を供給する電源部５とが設けられている。   In FIG. 7, in the control system for controlling the fuel injection device of the automobile engine, the control control unit 2 to which the driving current is supplied from the battery 1 controls the fuel injection device 3 of the engine. The control control unit 2 is provided with a CPU 4 that calculates and controls the injection amount and injection timing of the fuel injection device, and a power supply unit 5 that supplies current to the CPU 4.

この電源部には、図８に示すように、コイル部品６、コンデンサ部品７とからなるフィルタ部８と、コイル部品６、コンデンサ部品７、ＩＣ９、スイッチング部品１０とからなるＤＣ／ＤＣコンバータ回路部１１とを互いに接続するとともに、バッテリー１側のバッテリー用端子１２にはフィルタ部８を、ＣＰＵ４側のＣＰＵ用端子１３にはＤＣ／ＤＣコンバータ回路部１１を接続している。特に、ＤＣ／ＤＣコンバータ回路部１１に用いるコイル部品６はスイッチング部品１０によってスイッチング駆動させられ、ＤＣ／ＤＣコンバータ回路部１１において、バッテリー１の１２Ｖ電圧をＣＰＵ４用として、１．５〜５Ｖ程度に降圧している。   As shown in FIG. 8, the power supply unit includes a filter unit 8 including a coil component 6 and a capacitor component 7, and a DC / DC converter circuit unit including a coil component 6, a capacitor component 7, an IC 9, and a switching component 10. 11 are connected to each other, the filter unit 8 is connected to the battery terminal 12 on the battery 1 side, and the DC / DC converter circuit unit 11 is connected to the CPU terminal 13 on the CPU 4 side. In particular, the coil component 6 used for the DC / DC converter circuit unit 11 is driven to be switched by the switching component 10, and the DC / DC converter circuit unit 11 sets the 12 V voltage of the battery 1 to about 1.5 to 5 V for the CPU 4. I have a pressure drop.

このようなＤＣ／ＤＣコンバータ回路部１１に用いるコイル部品の１つとしては、図９、図１０に示すように、巻軸部２０の両端に鍔を有するドラム状のドラム磁心２１と、このドラム磁心２１の巻軸部２０に巻回したコイル２２と、このコイル２２を被覆するように、ドラム磁心２１に組み合わせたリング状のリング磁心２３と、このコイル２２と電気的に接続した端子部２４とを備えたものがある。このコイル２２は、丸線からなる導線を螺旋状に巻回して形成したものであり、その引き出し線２５はＬ字状の端子部２４の一端２６に絡げている。   As one of the coil components used in such a DC / DC converter circuit section 11, as shown in FIGS. 9 and 10, a drum-shaped drum magnetic core 21 having hooks at both ends of the winding shaft section 20, and the drum A coil 22 wound around the winding shaft portion 20 of the magnetic core 21, a ring-shaped ring magnetic core 23 combined with the drum magnetic core 21 so as to cover the coil 22, and a terminal portion 24 electrically connected to the coil 22. There is something with. The coil 22 is formed by spirally winding a conducting wire made of a round wire, and the lead wire 25 is wound around one end 26 of the L-shaped terminal portion 24.

また、ドラム磁心２１およびリング磁心２３はフェライト材料からなり、ドラム磁心２１とリング磁心２３とは接着剤２７を塗布して一体化している。   The drum magnetic core 21 and the ring magnetic core 23 are made of a ferrite material, and the drum magnetic core 21 and the ring magnetic core 23 are integrated by applying an adhesive 27.

なお、この出願の発明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２００２−６４０２４号公報 As prior art document information relating to the invention of this application, for example, Patent Document 1 is known.
JP 2002-64024 A

上記従来のコイル部品は、自動車のエンジン近傍のＤＣ／ＤＣコンバータ回路部１１に用いるので、耐熱性が要求される。しかし、上記コイル部品は、ドラム磁心２１とリング磁心２３とを接着剤２７を塗布して一体化しているので、この接着剤２７の耐熱温度によっては接着剤２７が溶融して信頼性が劣化するという問題点を有していた。   Since the conventional coil component is used for the DC / DC converter circuit unit 11 in the vicinity of the automobile engine, heat resistance is required. However, in the coil component, since the drum magnetic core 21 and the ring magnetic core 23 are integrated by applying the adhesive 27, the adhesive 27 melts depending on the heat-resistant temperature of the adhesive 27 and the reliability deteriorates. It had the problem that.

また、コイル２２の引き出し線２５はＬ字状の端子部２４に絡げているので、自動車のエンジンの振動によって、端子部２４とコイル２２の引き出し線２５との間に張力が加わり易く、引き出し線２５が断線する恐れがあるという問題点を有していた。   Further, since the lead wire 25 of the coil 22 is entangled with the L-shaped terminal portion 24, tension is easily applied between the terminal portion 24 and the lead wire 25 of the coil 22 due to the vibration of the engine of the automobile. There was a problem that the wire 25 may be broken.

本発明は上記問題点を解決するために、接着剤の耐熱性を考慮する必要がないように、ドラム磁心とリング磁心とを接着剤で一体化せず、また、コイルの引き出し線の断線を抑制して、信頼性を向上したコイル部品を提供することを目的としている。   In order to solve the above problems, the present invention does not integrate the drum magnetic core and the ring magnetic core with an adhesive so that it is not necessary to consider the heat resistance of the adhesive. It aims at providing the coil component which suppressed and improved the reliability.

本発明は上記問題点を解決するために、以下の構成を有する。   In order to solve the above problems, the present invention has the following configuration.

本発明は、磁性材料を粉末にして表面を絶縁皮膜で覆い、結合剤を混合して加圧成形した磁心と、導線を螺旋状に巻回して形成し、前記磁心に埋設したコイルと、前記コイルと電気的に接続した端子部とを備え、前記端子部は、前記磁心から突出させて折曲加工した前記コイルの引き出し線と、前記引き出し線に重ね合わせて前記引き出し線の位置および形状を保持する保持部とからなり、前記保持部には、前記コイルの引き出し線を収納する溝部を設けた構成である。   The present invention comprises a magnetic material made of powdered powder, the surface is covered with an insulating film, a binder is mixed and pressure-molded, and a coil is formed by winding a conductive wire in a spiral, embedded in the magnetic core, A terminal portion electrically connected to the coil, the terminal portion protruding from the magnetic core and bent, and the position and shape of the lead wire superimposed on the lead wire The holding portion is configured to have a groove portion for receiving the lead wire of the coil.

上記構成により、端子部は、磁心から突出させて折曲加工したコイルの引き出し線と、前記引き出し線に重ね合わせて前記引き出し線の位置および形状を保持する保持部とからなるので、折曲加工されたコイルの引き出し線の位置および形状を保持部によって保持でき、引き出し線自体を端子部として用いることが可能となる。   With the above configuration, the terminal portion is composed of a coil lead wire that is bent from the magnetic core and a holding portion that overlaps the lead wire and holds the position and shape of the lead wire. The position and shape of the drawn wire of the formed coil can be held by the holding portion, and the outgoing wire itself can be used as the terminal portion.

よって、引き出し線を端子部に絡げる必要がなくなり、引き出し線の断線を抑制して信頼性を向上できるとともに、コイルの巻回数を増やすために、コイルの厚みを薄くしたりコイルの線径を細くしたりして、引き出し線そのものが撓み易くなったり自立しなくなったりしても、コイルの引き出し線の断線を抑制して信頼性を向上できる。   Therefore, there is no need to tie the lead wire to the terminal part, and it is possible to improve the reliability by suppressing the disconnection of the lead wire, and in order to increase the number of turns of the coil, the coil thickness is reduced or the coil wire diameter is reduced. Even if the lead wire becomes thin and becomes difficult to bend or becomes independent, the disconnection of the lead wire of the coil can be suppressed and the reliability can be improved.

特に、保持部には、コイルの引き出し線を収納する溝部を設けているので、引き出し線の位置および形状の保持を容易かつ的確にすることができる。   In particular, since the holding portion is provided with a groove portion for accommodating the lead wire of the coil, the position and shape of the lead wire can be easily and accurately maintained.

また、コイルは、磁性材料を粉末にして表面を絶縁皮膜で覆い、結合剤を混合して加圧成形した磁心に埋設しているので、接着剤を用いずに磁心を形成でき、耐熱性を向上できる。   In addition, the coil is made of powdered magnetic material, covered with an insulating film, embedded in a magnetic core that has been press-molded by mixing a binder, so the magnetic core can be formed without using an adhesive, and heat resistance is improved. It can be improved.

このように本発明によれば、耐熱性および信頼性を向上したコイル部品を提供することができる。   Thus, according to the present invention, it is possible to provide a coil component with improved heat resistance and reliability.

以下、本発明の実施の形態を用いて、本発明の全請求項に記載の発明について説明する。   Hereinafter, the invention described in all claims of the present invention will be described using embodiments of the present invention.

図１は本発明の一実施の形態におけるコイル部品の分解斜視図、図２は同コイル部品の磁心の分解斜視図、図３は同コイル部品のコイルと接続した端子部の拡大斜視図、図４は同コイル部品の斜視図、図５は同コイル部品の断面図、図６は図３のＡ部に示す同コイル部品の端子部の拡大断面図である。   1 is an exploded perspective view of a coil component according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of a magnetic core of the coil component, and FIG. 3 is an enlarged perspective view of a terminal portion connected to a coil of the coil component. 4 is a perspective view of the coil component, FIG. 5 is a cross-sectional view of the coil component, and FIG. 6 is an enlarged cross-sectional view of a terminal portion of the coil component shown in part A of FIG.

図１〜図６において、本発明の一実施の形態におけるコイル部品は、磁性材料を粉末にして表面を絶縁皮膜で覆い、結合剤を混合して加圧成形した断面が矩形状の磁心３０と、導線を螺旋状に巻回して形成し、この磁心３０に埋設したコイル部３２と、このコイル部３２と電気的に接続した端子部３４とを備えている。   1 to 6, a coil component according to an embodiment of the present invention includes a magnetic core 30 having a rectangular cross-section in which a magnetic material is powdered, the surface is covered with an insulating film, and a binder is mixed and pressed. The coil portion 32 is formed by winding a conductive wire in a spiral shape and embedded in the magnetic core 30, and a terminal portion 34 electrically connected to the coil portion 32.

磁心３０は、熱硬化性樹脂を含有した結合剤と磁性粉末とを熱硬化性樹脂が完全硬化しない非加熱状態で混合して０．５〜１トン／ｃｍ2程度で加圧成形した複数の圧粉体３６を、コイル部３２を挟み込むように再加圧成形して、圧粉体３６でコイル部３２を被覆するとともに熱硬化性樹脂が完全硬化するように加熱して成形している。この際、再加圧成形は加圧成形よりも大きな圧力の３〜５トン／ｃｍ2程度で加圧しており、再加圧成形前よりも再加圧成形後は、圧粉体３６の厚みが薄くなり、成形密度が大きくなるようにしている。特に、圧粉体３６は２個とし、一方の圧粉体３６はコイル部３２を完全に収納する収納部３８を形成した角柱状の形状とし、他方の圧粉体３６は一方の圧粉体３６に被せる蓋状の形状とし、コイル部３２の引き出し線４２は２個の圧粉体３６の界面４０から突出させている。 The magnetic core 30 is formed by mixing a binder containing a thermosetting resin and magnetic powder in a non-heated state in which the thermosetting resin is not completely cured, and press-molding at about 0.5 to 1 ton / cm 2 . The green compact 36 is re-press-molded so as to sandwich the coil portion 32, and the green compact 36 is covered with the coil portion 32 and heated so that the thermosetting resin is completely cured. At this time, the re-pressure molding is performed at a pressure of about 3 to 5 ton / cm 2 , which is larger than the pressure molding, and the thickness of the green compact 36 after the re-pressure molding than before the re-pressure molding. Is made thinner and the molding density is increased. In particular, there are two green compacts 36, one green compact 36 has a prismatic shape formed with a storage portion 38 that completely stores the coil portion 32, and the other green compact 36 is one green compact. The lead wire 42 of the coil portion 32 protrudes from the interface 40 of the two green compacts 36.

端子部３４は、磁心３０から突出させて磁心３０の側面から底面に向かって折曲加工したコイル部３２の引き出し線４２と、引き出し線４２に重ね合わせて引き出し線４２の位置および形状を保持する保持部４４とからなっている。この保持部４４は自立して保持部４４の形状を保持することができる自立性を有する金属の平板からなる。ここでいう自立性とは、折曲加工された引き出し線４２に重ね合わせた保持部４４の形状が、外力によって容易に変形することがなく、磁心３０に対する引き出し線４２の位置および引き出し線４２の形状を保持することが可能な程度の剛性を有することを意味している。保持部４４は、少なくとも引き出し線４２の剛性よりも大きい剛性を有している。   The terminal portion 34 protrudes from the magnetic core 30 and is bent from the side surface to the bottom surface of the magnetic core 30. The terminal portion 34 overlaps the lead wire 42 and holds the position and shape of the lead wire 42. And a holding portion 44. The holding part 44 is made of a metal flat plate having a self-supporting property capable of supporting the shape of the holding part 44 independently. The self-supporting property here means that the shape of the holding portion 44 superimposed on the bent lead wire 42 is not easily deformed by an external force, and the position of the lead wire 42 with respect to the magnetic core 30 and the lead wire 42. It means having a rigidity that can hold the shape. The holding portion 44 has a rigidity that is at least greater than the rigidity of the lead wire 42.

保持部４４には、磁心３０側と反対側の表面に、磁心３０の側面から底面に向かって、コイル部３２の引き出し線４２を収納する溝部４６を設けている。この溝部４６には、磁心３０の側面と底面との稜部４８に対向する位置に貫通孔５０を設け、この貫通孔５０上に引き出し線４２を配置するとともに、この貫通孔５０上で引き出し線４２を磁心３０の側面から底面に折曲している。   The holding portion 44 is provided with a groove portion 46 for housing the lead wire 42 of the coil portion 32 from the side surface to the bottom surface of the magnetic core 30 on the surface opposite to the magnetic core 30 side. In this groove portion 46, a through hole 50 is provided at a position facing the ridge portion 48 between the side surface and the bottom surface of the magnetic core 30, a lead wire 42 is disposed on the through hole 50, and the lead wire is placed on the through hole 50. 42 is bent from the side surface of the magnetic core 30 to the bottom surface.

この溝部４６の幅は、図６に示すように、引き出し線４２の径よりも広くするとともに、溝部４６の開口面５２と導線の外周面とを略同一面になるようにしており、引き出し線４２は接着剤によって溝部４６に接着して収納している。この接着は仮止め程度でもよく、実装時に実装基板のランドと半田によって接続してもよい。   As shown in FIG. 6, the width of the groove portion 46 is larger than the diameter of the lead wire 42, and the opening surface 52 of the groove portion 46 and the outer peripheral surface of the conducting wire are substantially flush with each other. 42 is accommodated in the groove 46 by an adhesive. This adhesion may be temporarily fixed, or may be connected to the land of the mounting substrate by soldering at the time of mounting.

また、保持部４４の一方の端部５３の形状は端面５４に２つの突出部５６を形成したコ字形状にするとともに、突出部５６と端面５４との間で形成される角部５８を円弧状に形成しており、端面５４と突出部５６でコイル部３２の外縁部を囲むように端部５３を磁心３０に埋設している。特に、突出部５６は磁心３０の上面側で埋設し、かつ磁心３０の隅部６０に配置するとともに、端面５４は磁心３０の側面側で埋設している。端面５４の中央部には切欠部６２を設けるとともに、突出部５６には埋設方向と垂直方向に凸部６４を設け、切欠部６２に対向する位置で引き出し線４２を折曲加工している。   In addition, the shape of one end 53 of the holding portion 44 is a U-shape in which two protrusions 56 are formed on the end surface 54, and a corner 58 formed between the protrusion 56 and the end surface 54 is circular. The end portion 53 is embedded in the magnetic core 30 so as to surround the outer edge portion of the coil portion 32 with the end face 54 and the protruding portion 56. In particular, the protruding portion 56 is embedded on the upper surface side of the magnetic core 30 and is disposed at the corner portion 60 of the magnetic core 30, and the end surface 54 is embedded on the side surface side of the magnetic core 30. A notch 62 is provided at the center of the end face 54, and a protrusion 64 is provided in the protrusion 56 in a direction perpendicular to the embedding direction, and the lead wire 42 is bent at a position facing the notch 62.

さらに、コイル部３２の隣接する導線間には、磁性材料の粉末を介在させず、導線を互いに密着させるように、導線の断面形状を略六角形状にしており、各々の導線は自己融着線としている。   Furthermore, between the adjacent conducting wires of the coil part 32, the cross-sectional shape of the conducting wires is substantially hexagonal so that the conducting wires are brought into close contact with each other without interposing the magnetic material powder, and each conducting wire is a self-bonding wire. It is said.

上記構成により、コイル部３２は、磁性材料を粉末にして表面を絶縁皮膜で覆い、結合剤を混合して加圧成形した磁心３０に埋設しているので、接着剤を用いずに磁心３０を形成でき、耐熱性を向上できる。   With the above configuration, the coil portion 32 is made of powdered magnetic material, covered with an insulating film, embedded in the magnetic core 30 formed by mixing and bonding a binder, so that the magnetic core 30 can be formed without using an adhesive. It can form and can improve heat resistance.

また、端子部３４は、磁心３０から突出させて折曲加工したコイル部３２の引き出し線４２と、この引き出し線４２に重ね合わせて引き出し線４２の位置および形状を保持する保持部４４とからなるので、折曲加工されたコイル部３２の引き出し線４２の位置および形状を保持部４４によって保持でき、引き出し線４２自体を端子部３４として用いることが可能となる。   The terminal portion 34 includes a lead wire 42 of the coil portion 32 that is bent from the magnetic core 30 and a holding portion 44 that holds the position and shape of the lead wire 42 so as to overlap the lead wire 42. Therefore, the position and shape of the lead wire 42 of the coil portion 32 that has been bent can be held by the holding portion 44, and the lead wire 42 itself can be used as the terminal portion 34.

よって、引き出し線４２を端子部３４に絡げる必要がなくなり、引き出し線４２の断線を抑制し信頼性を向上できるとともに、コイル部３２の巻回数を増やすために、コイル部３２の厚みを薄くしたりコイル部３２の線径を細くしたりして、引き出し線４２そのものが撓み易くなったり自立しなくなったりしても、コイル部３２の引き出し線４２の断線を抑制して信頼性を向上できる。   Therefore, it is not necessary to tie the lead wire 42 to the terminal portion 34, the disconnection of the lead wire 42 can be suppressed and the reliability can be improved, and the coil portion 32 is made thin in order to increase the number of turns of the coil portion 32. Even if the wire diameter of the coil portion 32 is reduced or the lead wire 42 is not easily bent or becomes independent, the disconnection of the lead wire 42 of the coil portion 32 can be suppressed to improve reliability. .

特に、保持部４４には、コイル部３２の引き出し線４２を収納する溝部４６を設けているので、引き出し線４２の位置および形状の保持を容易かつ的確にすることができる。この溝部４６の幅は導線の径よりも広くしているので、引き出し線４２の収納も容易である。収納にあたっては、溝部４６の開口面５２と引き出し線４２の外周面とを略同一面になるようにしているので、実装時における平坦性を確保でき、実装性がよい。この際、磁心３０の側面と底面との稜部４８に対向する位置に貫通孔５０を設け、貫通孔５０上に引き出し線４２を配置するとともに、この貫通孔５０上で引き出し線４２を磁心３０の側面から底面に折曲しているので、磁心３０の側面から底面に引き出し線が保持部４４に重なって折曲された際、引き出し線４２に張力がかかりにくく、断線を抑制できる。   In particular, since the holding portion 44 is provided with the groove portion 46 for accommodating the lead wire 42 of the coil portion 32, the position and shape of the lead wire 42 can be easily and accurately maintained. Since the width of the groove 46 is wider than the diameter of the conducting wire, the lead wire 42 can be easily stored. In storing, since the opening surface 52 of the groove 46 and the outer peripheral surface of the lead wire 42 are substantially flush with each other, the flatness during mounting can be ensured and the mountability is good. At this time, the through hole 50 is provided at a position facing the ridge 48 between the side surface and the bottom surface of the magnetic core 30, the lead wire 42 is disposed on the through hole 50, and the lead wire 42 is placed on the magnetic core 30 on the through hole 50. Since the lead wire is bent from the side surface to the bottom surface of the magnetic core 30 so as to overlap the holding portion 44, tension is not easily applied to the lead wire 42, and disconnection can be suppressed.

さらに、溝部４６は磁心３０側と反対側の保持部４４の表面に設けているので、引き出し線４２と保持部４４との接続が適切にされているかの確認が目視で容易に行え接続信頼性を向上できる。   Further, since the groove portion 46 is provided on the surface of the holding portion 44 opposite to the magnetic core 30 side, it is easy to visually check whether the lead wire 42 and the holding portion 44 are properly connected. Can be improved.

以上のように本発明にかかるコイル部品は、耐熱性および信頼性を向上できるので、各種電子機器、通信機器等に適用できる。   As described above, since the coil component according to the present invention can improve heat resistance and reliability, it can be applied to various electronic devices and communication devices.

本発明の一実施の形態におけるコイル部品の分解斜視図The disassembled perspective view of the coil components in one embodiment of this invention 同コイル部品の磁心の分解斜視図An exploded perspective view of the magnetic core of the coil component 同コイル部品のコイルと接続した端子部の拡大斜視図An enlarged perspective view of a terminal portion connected to a coil of the same coil component 同コイル部品の斜視図Perspective view of the coil component 同コイル部品の断面図Cross-sectional view of the coil component 図３のＡ部に示す同コイル部品の端子部の拡大断面図The expanded sectional view of the terminal part of the coil component shown to A section of Drawing 3 自動車エンジンの燃料噴射装置を制御する制御システム全体を示すブロック図The block diagram which shows the whole control system which controls the fuel injection device of the automobile engine 同制御システムの制御コントロール部における電源部の回路図Circuit diagram of the power supply unit in the control unit of the control system 同コイル部品の断面図Cross-sectional view of the coil component 同電源部に用いる従来のコイル部品の斜視図A perspective view of a conventional coil component used for the power supply unit

符号の説明Explanation of symbols

３０ 磁心
３２ コイル部
３４ 端子部
３６ 圧粉体
３８ 収納部
４０ 界面
４２ 引き出し線
４４ 保持部
４６ 溝部
４８ 稜部
５０ 貫通孔
５２ 開口面
５３ 端部
５４ 端面
５６ 突出部
５８ 角部
６０ 隅部
６２ 切欠部
６４ 凸部 DESCRIPTION OF SYMBOLS 30 Magnetic core 32 Coil part 34 Terminal part 36 Green compact 38 Storage part 40 Interface 42 Lead line 44 Holding part 46 Groove part 48 Ridge part 50 Through-hole 52 Opening surface 53 End part 54 End surface 56 Projection part 58 Corner part 60 Corner part 62 Notch Part 64 Convex part

Claims (5)

磁性材料を粉末にして表面を絶縁皮膜で覆い、結合剤を混合して加圧成形した磁心と、導線を螺旋状に巻回して形成し、前記磁心に埋設したコイルと、前記コイルと電気的に接続した端子部とを備え、前記端子部は、前記磁心から突出させて折曲加工した前記コイルの引き出し線と、前記引き出し線に重ね合わせて前記引き出し線の位置および形状を保持する保持部とからなり、前記保持部には、前記コイルの引き出し線を収納する溝部を設けたコイル部品。 Magnetic material is powdered, the surface is covered with an insulating film, a binder is mixed and pressure-molded, a magnetic core is formed by winding a conductive wire in a spiral, and the coil is embedded in the magnetic core. A terminal portion connected to the lead wire, the terminal portion protruding from the magnetic core and bent, and a holding portion that holds the position and shape of the lead wire superimposed on the lead wire And a coil part in which the holding part is provided with a groove part for accommodating the lead wire of the coil. 前記溝部の幅は前記導線の径より広くした請求項１記載のコイル部品。 The coil component according to claim 1, wherein a width of the groove is wider than a diameter of the conducting wire. 前記溝部の開口面と前記引き出し線の外周面とを略同一面になるようにした請求項１記載のコイル部品。 The coil component according to claim 1, wherein the opening surface of the groove and the outer peripheral surface of the lead wire are substantially flush with each other. 前記溝部は前記磁心側と反対側の前記保持部の表面に設けた請求項１記載のコイル部品。 The coil component according to claim 1, wherein the groove portion is provided on a surface of the holding portion opposite to the magnetic core side. 前記溝部には、前記磁心の側面と底面との稜部に対向する位置に貫通孔を設け、前記貫通孔上に前記引き出し線を配置するとともに、前記貫通孔上で前記引き出し線を前記磁心の側面から底面に折曲した請求項１記載のコイル部品。 The groove portion is provided with a through hole at a position facing the ridge portion between the side surface and the bottom surface of the magnetic core, the lead wire is disposed on the through hole, and the lead wire is placed on the through hole in the magnetic core. The coil component according to claim 1, wherein the coil component is bent from a side surface to a bottom surface.
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