JP2005310866A - Coil component - Google Patents

Coil component Download PDF

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JP2005310866A
JP2005310866A JP2004122568A JP2004122568A JP2005310866A JP 2005310866 A JP2005310866 A JP 2005310866A JP 2004122568 A JP2004122568 A JP 2004122568A JP 2004122568 A JP2004122568 A JP 2004122568A JP 2005310866 A JP2005310866 A JP 2005310866A
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magnetic core
coil
lead wire
coil component
shape
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JP2004122568A
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Mutsuyasu Otsubo
睦泰 大坪
Shusuke Uematsu
秀典 植松
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Panasonic Holdings Corp
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Matsushita Electric Industrial Co Ltd
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Priority to JP2004122568A priority Critical patent/JP2005310866A/en
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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 coils. <P>SOLUTION: A terminal 34 is provided with lead-out wires 42 of coils 32 which are projected from the core 30 and are folded toward a base from the side of the core 30, and with holders 44 which are overlapped with the lead-out wires 42 and hold positions and shapes of the lead-out wires 42. The shape of one terminal 53 of the holder 44 is formed in a U shape where two projecting parts 56 are formed in an end face 54. Corners 58 formed between the projecting parts 56 and the end face 54 are formed arc-shaped. <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で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 applied and integrated with 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、前記保持部は、一方の端部の形状を端面に２つの突出部を形成したコ字形状にするとともに、前記端面と前記突出部で前記コイルの外縁部を囲むように、前記端部を前記磁心に埋設した構成である。   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 formed into a U shape in which one end portion is formed with two protruding portions on the end surface, and the end surface and the protruding portion surround the outer edge portion of the coil. Thus, the end is embedded in the magnetic core.

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、この引き出し線に重ね合わせて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、保持部によって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 bent coil lead wire can be maintained, and the lead wire itself can be used as a terminal portion.

これにより、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、引き出し線自体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。   As a result, there is no need to tie the lead wire to the terminal part, and the reliability of the lead wire can be suppressed by suppressing the disconnection of the lead wire, and the coil thickness is reduced or the coil wire diameter is increased in order to increase the number of coil turns. Even if the lead wire becomes thin or 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、保持部は、一方の端部の形状を端面に２つの突出部を形成したコ字形状にするとともに、端面と突出部でコイルの外縁部を囲むように、端部を磁心に埋設しているので、保持部を磁心に容易に固定できるとともに、コイルと保持部との短絡を抑制しつつ保持部が磁心から抜けることを抑制できる。   In particular, the holding part is formed in a U shape in which one end part is formed with two protrusions on the end face, and the end part is embedded in the magnetic core so as to surround the outer edge part of the coil by the end face and the protrusion part. Therefore, the holding portion can be easily fixed to the magnetic core, and the holding portion can be prevented from coming out of the magnetic core while suppressing a short circuit between the coil and the holding portion.

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, and FIG. 5 is a cross-sectional view of the coil component.

図１〜図５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 5, 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 spirally winding a conductive wire 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。   The width of the groove 46 is wider than the diameter of the lead wire 42, and the opening surface of the groove 46 and the outer peripheral surface of the conducting wire are substantially flush with each other. The lead wire 42 is bonded to the groove 46 by an adhesive. And stored. 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、保持部４４によって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 bent by the holding portion 44 can be held, and the lead wire 42 itself can be used as the terminal portion 34.

これにより、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の断線を抑制して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自体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。   As a result, 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 thickness of the coil portion 32 can be increased 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 wire diameter of the coil portion 32 is reduced, the lead wire 42 itself becomes easily bent or becomes independent, thereby suppressing the disconnection of the lead wire 42 of the coil portion 32 and improving reliability. it can.

特に、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、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に埋設しているので、保持部４４を磁心３０に容易に固定できるとともに、コイル部３２と保持部４４との短絡を抑制しつつ保持部４４が磁心３０から抜けることを抑制できる。突出部５６には端部５３の埋設方向と垂直方向に凸部６４を設けているので、この凸部６４によって磁心３０から端子部３４を抜けにくくでき、突出部５６は断面形状が矩形状の磁心３０の隅部６０に配置するので、コイル部３２から生じる磁束に影響を与えることもない。   In particular, the shape of the one end portion 53 of the holding portion 44 is a U shape in which two projecting portions 56 are formed on the end surface 54, and the end surface 54 and the projecting portion 56 surround the outer edge portion of the coil portion 32. Since the end portion 53 is embedded in the magnetic core 30, the holding portion 44 can be easily fixed to the magnetic core 30, and the holding portion 44 comes out of the magnetic core 30 while suppressing a short circuit between the coil portion 32 and the holding portion 44. Can be suppressed. Since the protruding portion 56 is provided with a convex portion 64 in a direction perpendicular to the embedding direction of the end portion 53, the convex portion 64 can prevent the terminal portion 34 from coming out of the magnetic core 30, and the protruding portion 56 has a rectangular cross-sectional shape. Since it arrange | positions in the corner part 60 of the magnetic core 30, the magnetic flux which arises from the coil part 32 is not affected.

端面５４の中央部には切欠部６２を設け、この切欠部６２に対向する位置で引き出し線４２を折曲加工しているので、引き出し線４２が保持部４４に重なって磁心３０の側面に折曲された際、引き出し線４２に張力がかかりにくく、断線を抑制できる。   A notch 62 is provided at the center of the end face 54, and the lead wire 42 is bent at a position facing the notch 62. Therefore, the lead wire 42 overlaps the holding portion 44 and is folded on the side surface of the magnetic core 30. When bent, it is difficult to apply tension to the lead wire 42, and disconnection can be suppressed.

突出部５６と端面５４との間で形成される角部５８は円弧状に形成しているので、振動が加わっても、突出部５６と端面５４との角部５８に応力が集中することがなく、角部５８にひび割れが生じたり角部５８に断裂が生じたりすることを抑制できる。突出部５６と端面５４との稜部４８近傍で端子部３４は折曲し、突出部５６は磁心３０の上面側で埋設するとともに、端面５４は磁心３０の側面側で埋設しているので、磁心３０の突出位置の近傍において割れや欠けが生じたりすることも抑制できる。   Since the corner 58 formed between the protrusion 56 and the end face 54 is formed in an arc shape, stress may concentrate on the corner 58 between the protrusion 56 and the end face 54 even when vibration is applied. In addition, it is possible to prevent the corner portion 58 from being cracked or the corner portion 58 from being broken. Since the terminal portion 34 is bent in the vicinity of the ridge 48 between the protruding portion 56 and the end surface 54, the protruding portion 56 is embedded on the upper surface side of the magnetic core 30, and the end surface 54 is embedded on the side surface side of the magnetic core 30, It is also possible to suppress the occurrence of cracking or chipping in the vicinity of the protruding position of the magnetic core 30.

なお、端子部３４の凸部６４の位置は図６に示すように、上方に向かって設けてもよい。   In addition, you may provide the position of the convex part 64 of the terminal part 34 toward upper direction, as shown in FIG.

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 同コイル部品のコイルと接続した他の端子部の拡大斜視図An enlarged perspective view of another terminal connected to the coil of the same coil component 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
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 53 End part 54 End surface 56 Projection part 58 Corner part 60 Corner part 62 Notch part 64 Convex part Part

Claims (6)

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、前記保持部は、一方の端部の形状を端面に２つの突出部を形成したコ字形状にするとともに、前記端面と前記突出部で前記コイルの外縁部を囲むように、前記端部を前記磁心に埋設したコイル部品。 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 The holding portion is formed in a U-shape in which one end portion is formed with two protruding portions on the end surface, and the end surface and the protruding portion surround the outer edge portion of the coil. A coil component having an end embedded in the magnetic core. 前記突出部と前記端面との間で形成される角部を円弧状に形成した請求項１記載のコイル部品。 The coil component according to claim 1, wherein a corner portion formed between the protruding portion and the end surface is formed in an arc shape. 前記磁心は断面形状を矩形状にするとともに、前記突出部を前記磁心の角部に配置した請求項１記載のコイル部品。 The coil component according to claim 1, wherein the magnetic core has a rectangular cross-sectional shape and the protrusions are arranged at corners of the magnetic core. 前記突出部には、前記端部の埋設方向と垂直方向に凸部を設けた請求項１記載のコイル部品。 The coil component according to claim 1, wherein the projecting portion is provided with a convex portion in a direction perpendicular to the embedding direction of the end portion. 前記突出部は前記磁心の上面側で埋設するとともに、前記端面は前記磁心の側面側で埋設した請求項１記載のコイル部品。 The coil component according to claim 1, wherein the protruding portion is embedded on the upper surface side of the magnetic core, and the end surface is embedded on the side surface side of the magnetic core. 前記端面の中央部に切欠部を設け、前記切欠部に対向する位置で前記引き出し線を折曲加工した請求項１記載のコイル部品。 The coil component according to claim 1, wherein a notch portion is provided at a center portion of the end face, and the lead wire is bent at a position facing the notch portion.
JP2004122568A 2004-04-19 2004-04-19 Coil component Withdrawn JP2005310866A (en)

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Country Link
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102105953A (en) * 2008-10-08 2011-06-22 库帕技术公司 High current amorphous powder core inductor
US9202617B2 (en) 2013-07-03 2015-12-01 Cooper Technologies Company Low profile, surface mount electromagnetic component assembly and methods of manufacture

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102105953A (en) * 2008-10-08 2011-06-22 库帕技术公司 High current amorphous powder core inductor
JP2012505545A (en) * 2008-10-08 2012-03-01 クーパー テクノロジーズ カンパニー High current amorphous powder core inductor
US9202617B2 (en) 2013-07-03 2015-12-01 Cooper Technologies Company Low profile, surface mount electromagnetic component assembly and methods of manufacture

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