JP4983389B2

JP4983389B2 - Coil parts

Info

Publication number: JP4983389B2
Application number: JP2007130681A
Authority: JP
Inventors: 孝長坂; 英樹三浦; 保彦北島; 新一門脇; 亨鷹島; 孝之伊東
Original assignee: TDK Corp
Current assignee: TDK Corp
Priority date: 2007-05-16
Filing date: 2007-05-16
Publication date: 2012-07-25
Anticipated expiration: 2027-05-16
Also published as: JP2008288320A

Description

本発明は、コイル部品、特に巻線型のコイル部品に関する。 The present invention relates to a coil component, and more particularly to a coiled coil component.

コイル部品として、巻線と、巻線が巻回されるコアと、コアに取り付けられた一対の端子金具と、を備えたものが知られている（例えば、特許文献１参照）。
特開平８−１５３６３３号公報 As a coil component, a coil component is known that includes a winding, a core around which the winding is wound, and a pair of terminal fittings attached to the core (see, for example, Patent Document 1).
JP-A-8-153633

しかしながら、上述した従来のコイル部品には、次のような課題が存在している。すなわち、コイル部品は、端子金具に発生する渦電流によって、交流損失やインダクタンス等の特性が劣化することが知られているが、このような特性劣化に対する対応が不十分であった。そこで、発明者らは、鋭意研究の末、上記特性劣化を有意に改善することができる技術を新たに見出した。 However, the conventional coil components described above have the following problems. That is, the coil parts are known to deteriorate in characteristics such as AC loss and inductance due to eddy currents generated in the terminal fittings, but the countermeasures against such characteristic deterioration are insufficient. Therefore, the inventors have newly found a technique capable of significantly improving the above characteristic deterioration after intensive studies.

そこで、本発明は、上述の課題を解決するためになされたもので、特性の向上が図られたコイル部品を提供することを目的とする。 Accordingly, the present invention has been made to solve the above-described problems, and an object thereof is to provide a coil component with improved characteristics.

本発明に係るコイル部品は、巻線と、巻線が巻回されると共に、互いに対向する一対の端面を有する巻芯と、巻芯の各端面に取り付けられる一対の端子金具と、を備え、各端子金具は、巻芯の端面に対面するように配置される対面部と、対面部に連続し、実装基板に設けられた接続端子に接続されるべき端子部と、を有し、対面部は、端子部に連続する基部と、基部から互いに所定の間隔を有して伸びる少なくとも二つの片部と、を含んでおり、少なくとも二つの片部のうち一方の片部の先端部分は、巻芯の端面の輪郭より外側に位置すると共に、巻線の端部が継線されていることを特徴とする。 A coil component according to the present invention includes a winding, a winding around which the winding is wound and a pair of end faces facing each other, and a pair of terminal fittings attached to each end face of the winding core, Each terminal fitting has a facing portion disposed so as to face the end surface of the winding core, and a terminal portion that is continuous with the facing portion and is to be connected to a connection terminal provided on the mounting board. Includes a base continuous to the terminal portion and at least two pieces extending from the base with a predetermined distance from each other, and a tip portion of one of the at least two pieces is wound. It is located outside the outline of the end face of the core, and the end of the winding is connected.

本発明に係るコイル部品では、基部から伸びる少なくとも二つの片部が互いに所定の間隔を有しているので、端子金具において渦電流が発生する部分の低減が図られている。また、基部から一つの片部のみが伸びる構成の場合に生じてしまう比較的大きな経路の渦電流は、少なくとも二つの片部の間の所定の間隔により、その経路が分断されるために生じない。このようにして渦電流の発生が抑えられているため、本発明におけるコイル部品は特性の向上が図られている。 In the coil component according to the present invention, since at least two pieces extending from the base portion have a predetermined distance from each other, a portion where eddy current is generated in the terminal fitting is reduced. In addition, a relatively large path eddy current that occurs when only one piece extends from the base does not occur because the path is divided by a predetermined interval between at least two pieces. . Since the generation of eddy currents is suppressed in this way, the characteristics of the coil component in the present invention are improved.

更に、本発明では、少なくとも二つの片部のうち一方の片部の先端部分は、巻芯の端面の輪郭より外側に位置している。これにより、上記先端部分と巻線との継線を容易に行なうことが可能な構成を実現することができる。 Furthermore, in this invention, the front-end | tip part of one piece part is located outside the outline of the end surface of a winding core among at least two piece parts. Thereby, the structure which can perform the connection of the said front-end | tip part and a coil | winding easily is realizable.

好ましくは、端子部及び基部は、端面に直交する方向から見て、端面における各片部が伸びる方向での中心線を挟んで一方の側に位置し、少なくとも二つの片部の先端部分は、中心線を挟んで他方の側に位置している。この場合、少なくとも二つの片部の長さが比較的長くなり、端子金具において渦電流が発生する部分をより一層低減することができる。この結果、交流損失やインダクタンス等の特性を更に向上することができる。 Preferably, the terminal portion and the base portion are located on one side across the center line in the direction in which each piece portion on the end surface extends as viewed from the direction orthogonal to the end surface, and the tip portions of at least two piece portions are It is located on the other side across the center line. In this case, the length of at least two pieces becomes relatively long, and the portion where eddy current is generated in the terminal fitting can be further reduced. As a result, characteristics such as AC loss and inductance can be further improved.

好ましくは、対面部は、少なくとも二つの片部それぞれの途中部分から当該片部が伸びる方向と交差する方向に伸びる位置決め部を更に含んでいる。この場合、巻芯に一対の端子金具が取り付けられた構成を備えるコイル中間体の位置決めを容易に行なうことができる。 Preferably, the facing portion further includes a positioning portion extending from a middle portion of each of the at least two pieces in a direction intersecting with a direction in which the piece extends. In this case, it is possible to easily position the coil intermediate body having a configuration in which the pair of terminal fittings are attached to the winding core.

また、本発明に係るコイル部品は、巻線と、巻線が巻回されると共に、互いに対向する一対の端面を有する巻芯と、巻芯の各端面に取り付けられる一対の端子金具と、を備えており、各端子金具は、巻芯の端面に対面するように配置されると共に、端面に平行な第１の方向での両端部分が巻芯の端面の輪郭より外側に位置する対面部と、対面部の両端部分のうち一方の端部分に連続し、実装基板に設けられた接続端子に接続されるべき端子部と、を有し、対面部の両端部分のうち他方の端部分には、巻線の端部が継線されており、対面部には、当該対面部の両端部分のうち他方の端部分から一方の端部分に向けて伸びる切り欠き部が形成されていることを特徴とする。 The coil component according to the present invention includes a winding, a winding around which the winding is wound, a core having a pair of end faces facing each other, and a pair of terminal fittings attached to each end face of the winding core. Each terminal fitting is arranged so as to face the end face of the core, and both end portions in a first direction parallel to the end face are located on the outer side of the contour of the end face of the core. A terminal portion to be connected to a connection terminal provided on the mounting substrate, and the other end portion of the opposite end portions is connected to the connection terminal provided on the mounting substrate. The ends of the windings are connected, and the facing portion is formed with a notch extending from the other end portion toward the one end portion of the opposite end portions of the facing portion. And

本発明に係るコイル部品では、対面部には上記切り欠き部が形成されているので、端子金具において渦電流が発生する部分の低減が図られている。また、対面部に切り欠き部が警醒されていない構成の場合に生じてしまう比較的大きな経路の渦電流は、切り欠き部により、その経路が分断されるために生じない。このようにして渦電流の発生が抑えられているため、本発明におけるコイル部品は特性の向上が図られている。 In the coil component according to the present invention, since the notched portion is formed in the facing portion, the portion where the eddy current is generated in the terminal fitting is reduced. Further, the eddy current of a relatively large path that occurs when the notch is not alerted to the facing part does not occur because the path is divided by the notch. Since the generation of eddy currents is suppressed in this way, the characteristics of the coil component in the present invention are improved.

好ましくは、切り欠き部は、端面に直交する方向から見て、端面の第１の方向での中心線を越える位置まで伸びている。この場合、切り欠き部の長さが比較的長くなり、端子金具において渦電流が発生する部分をより一層低減することができる。この結果、交流損失やインダクタンス等の特性を更に向上することができる。 Preferably, the cutout portion extends to a position exceeding the center line in the first direction of the end face as seen from the direction orthogonal to the end face. In this case, the length of the notch is relatively long, and the portion where eddy current is generated in the terminal fitting can be further reduced. As a result, characteristics such as AC loss and inductance can be further improved.

好ましくは、対面部は、端面に平行で且つ第１の方向に直交する第２の方向での両端部分からそれぞれ伸びる位置決め部を含んでいる。この場合、巻芯に一対の端子金具が取り付けられた構成を備えるコイル中間体の位置決めを容易に行なうことができる。 Preferably, the facing portion includes positioning portions respectively extending from both end portions in a second direction parallel to the end surface and orthogonal to the first direction. In this case, it is possible to easily position the coil intermediate body having a configuration in which the pair of terminal fittings are attached to the winding core.

好ましくは、巻線と巻芯と一対の端子金具とのそれぞれ少なくとも一部を覆うように配置される外装部を更に備えており、上記位置決め部は、外装部を樹脂成型する際に用いられる型と当接する。この場合、上記コイル中間体を成形型に安定して配置することができ、外装部を適切に成形することができる。 Preferably, it further includes an exterior part arranged so as to cover at least a part of each of the winding, the core, and the pair of terminal fittings, and the positioning part is a mold used when resin molding the exterior part Abut. In this case, the said coil intermediate body can be stably arrange | positioned to a shaping | molding die, and an exterior part can be shape | molded appropriately.

また、好ましくは、外装部には、位置決め部に向けて窪んだ窪みが設けられている。 Preferably, the exterior portion is provided with a recess that is recessed toward the positioning portion.

本発明によれば、特性の向上が図られたコイル部品を提供することができる。 According to the present invention, a coil component with improved characteristics can be provided.

以下、添付図面を参照して、本発明の好適な実施形態について詳細に説明する。なお、説明において、同一要素又は同一機能を有する要素には、同一符号を用いることとし、重複する説明は省略する。 Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description, the same reference numerals are used for the same elements or elements having the same function, and redundant description is omitted.

まず、図１〜図３を参照して、本実施形態に係るコイル部品Ｃ１の構成を説明する。コイル部品Ｃ１は、表面実装タイプのコイル部品である。図１及び図２は、本実施形態に係るコイル部品Ｃ１を示す斜視図である。図３は、図１のIII−III線に沿った断面構成を示す図である。 First, with reference to FIGS. 1-3, the structure of the coil component C1 which concerns on this embodiment is demonstrated. The coil component C1 is a surface mount type coil component. 1 and 2 are perspective views showing a coil component C1 according to the present embodiment. FIG. 3 is a diagram showing a cross-sectional configuration along the line III-III in FIG.

図１及び図２に示すように、コイル部品Ｃ１は、巻芯１、巻線９、一対の端子金具１０、及び外装部３０を有している。 As shown in FIGS. 1 and 2, the coil component C <b> 1 includes a winding core 1, a winding 9, a pair of terminal fittings 10, and an exterior part 30.

巻芯１は、長尺円柱状の巻回部３と、巻回部３の両端に位置する一対の鍔部５，７とを有している。一対の鍔部５，７は、それぞれ巻回部３からその周方向に張り出した形状となっており、互いに略平行に配置されている。鍔部５，７は、巻回部３と同軸の円柱形状を呈しており、一対の主面５ａ，５ｂ，７ａ，７ｂ及び周側面５ｃ，７ｃを含んでいる。鍔部５の主面５ａと鍔部７の主面７ａは、対向している。鍔部５，７の主面５ｂ，７ｂは、巻芯１の端面を構成している。 The winding core 1 has a long cylindrical winding part 3 and a pair of flange parts 5 and 7 located at both ends of the winding part 3. The pair of eaves portions 5 and 7 has a shape protruding from the winding portion 3 in the circumferential direction, and is disposed substantially parallel to each other. The flange portions 5 and 7 have a cylindrical shape coaxial with the winding portion 3, and include a pair of main surfaces 5a, 5b, 7a and 7b and peripheral side surfaces 5c and 7c. The main surface 5a of the collar part 5 and the main surface 7a of the collar part 7 are opposed to each other. The main surfaces 5 b and 7 b of the flange portions 5 and 7 constitute the end surface of the core 1.

巻芯１は、例えば、フェライト等の磁性材料により構成することができる。本実施形態において、巻芯１における一対の鍔部５，７間の間隔は、５．６ｍｍとされている。各鍔部５，７の外径は、２．２ｍｍとされている。巻回部３の外径は、１．１ｍｍとされている。巻芯１は、樹脂（例えば、液晶ポリマー等）により構成してもよい。 The core 1 can be made of, for example, a magnetic material such as ferrite. In this embodiment, the space | interval between a pair of collar parts 5 and 7 in the core 1 is 5.6 mm. The outer diameters of the flange portions 5 and 7 are set to 2.2 mm. The outer diameter of the winding part 3 is 1.1 mm. The core 1 may be made of a resin (for example, a liquid crystal polymer).

巻線９は、巻芯１の巻回部３に接するように当該巻回部３に巻回されて、巻芯１における一対の鍔部５，７に挟まれた領域内に収容されている。巻線９は、絶縁被覆された金属導体線（例えば、耐熱性を有するウレタンワイヤー等）からなる。金属導体としては、銅等が用いられる。巻線９の外径は、例えば３０μｍ程度である。巻線９の巻き数は１５００程度であり、巻回テンションは３グラム程度である。 The winding 9 is wound around the winding portion 3 so as to be in contact with the winding portion 3 of the winding core 1 and is accommodated in a region sandwiched between the pair of flange portions 5 and 7 in the winding core 1. . The winding 9 is made of an insulating coated metal conductor wire (for example, a urethane wire having heat resistance). Copper or the like is used as the metal conductor. The outer diameter of the winding 9 is, for example, about 30 μm. The number of windings of the winding 9 is about 1500, and the winding tension is about 3 grams.

以下、説明の便宜上、巻芯１（巻回部３）の軸線方向（鍔部５，７の主面５ｂ，７ｂに直交する方向）をＸ方向、コイル部品Ｃ１が搭載された際の高さ方向をＺ方向、上記Ｘ方向及びＺ方向に直交するコイル部品Ｃ１の幅方向をＹ方向とする。 Hereinafter, for convenience of explanation, the axial direction of the core 1 (winding portion 3) (the direction perpendicular to the main surfaces 5b and 7b of the flange portions 5 and 7) is the X direction, and the height when the coil component C1 is mounted. The direction is the Z direction, and the width direction of the coil component C1 orthogonal to the X direction and the Z direction is the Y direction.

端子金具１０は、図４及び５に示されるように、対面部１２と端子部２０とを有している。図４は、端子金具を示す斜視図である。図５は、端子金具を示す正面図である。各端子金具１０は、鍔部５，７の主面５ｂ，７ｂに取り付けられている。本実施形態では、各端子金具１０は、接着材料１１を介して鍔部５，７に固定されている。端子金具１０は、公知の成形技術を用いて金属片を成形して得られた部材であり、対面部１２と端子部２０とは一体成形されている。端子金具１０は、例えば銅合金からなり、巻芯１側となる内側表面１０ｂを除いて錫めっきされている。 As shown in FIGS. 4 and 5, the terminal fitting 10 has a facing portion 12 and a terminal portion 20. FIG. 4 is a perspective view showing the terminal fitting. FIG. 5 is a front view showing the terminal fitting. Each terminal fitting 10 is attached to the main surfaces 5b and 7b of the flange portions 5 and 7. In the present embodiment, each terminal fitting 10 is fixed to the flange portions 5 and 7 via the adhesive material 11. The terminal fitting 10 is a member obtained by forming a metal piece using a known forming technique, and the facing portion 12 and the terminal portion 20 are integrally formed. The terminal fitting 10 is made of, for example, a copper alloy, and is tin-plated except for the inner surface 10b on the winding core 1 side.

対面部１２は、端子金具１０を巻芯１に取り付けた際に鍔部５，７の主面５ｂ，７ｂに接触して（若しくは近接して）対面する部分である。すなわち、対面部１２は、鍔部５，７の主面５ｂ，７ｂに対面するように配置されている。 The facing portion 12 is a portion that contacts (or is close to) the main surfaces 5 b and 7 b of the flange portions 5 and 7 when the terminal fitting 10 is attached to the core 1. That is, the facing portion 12 is disposed so as to face the main surfaces 5 b and 7 b of the flange portions 5 and 7.

対面部１２は、基部１４と、三つの片部１６〜１８と、位置決め部１９とを含んでいる。基部１４と、三つの片部１６〜１８と、位置決め部１９とは一体形成されている。基部１４は、端子部２０に連続している。すなわち、対面部１２は、鍔部５，７の主面５ｂ，７ｂに平行なＺ方向（第１の方向）での両端部分のうち一方の端部分において、端子部２０に連続している。 The facing portion 12 includes a base portion 14, three pieces 16 to 18, and a positioning portion 19. The base 14, the three pieces 16 to 18, and the positioning part 19 are integrally formed. The base portion 14 is continuous with the terminal portion 20. That is, the facing portion 12 is continuous with the terminal portion 20 at one end portion of both end portions in the Z direction (first direction) parallel to the main surfaces 5 b and 7 b of the flange portions 5 and 7.

各片部１６〜１８は、基部１４から互いに所定の間隔を有してＺ方向に伸びている。これにより、対面部１２には、当該対面部１２の上記両端部分のうち他方の端部分から一方の端部分に向けて伸びる二つの切り欠き部２２が形成されることとなる。 Each piece 16-18 extends in the Z direction from the base 14 at a predetermined interval. As a result, two notch portions 22 extending from the other end portion toward the one end portion of the both end portions of the facing portion 12 are formed in the facing portion 12.

対面部１２は、図６及び図７に示されるように、鍔部５，７の主面５ｂ，７ｂに直交する方向から見て、上記両端部分が鍔部５，７の主面５ｂ，７ｂの輪郭より外側に位置している。すなわち、各片部１６〜１８の先端部分は、鍔部５，７の主面５ｂ，７ｂに直交する方向から見て、鍔部５，７の主面５ｂ，７ｂの輪郭よりも外側に位置している。図６は、本実施形態に係るコイル部品を示す側面図である。図７は、本実施形態に係るコイル部品を示す正面図である。図６及び図７においては、外装部３０の図示を省略している。 As shown in FIGS. 6 and 7, the facing portion 12 is configured such that the both end portions are the main surfaces 5 b and 7 b of the flange portions 5 and 7 when viewed from the direction orthogonal to the main surfaces 5 b and 7 b of the flange portions 5 and 7. It is located outside the outline. That is, the tip portions of the pieces 16 to 18 are positioned outside the contours of the main surfaces 5b and 7b of the flanges 5 and 7 when viewed from the direction orthogonal to the main surfaces 5b and 7b of the flanges 5 and 7. is doing. FIG. 6 is a side view showing the coil component according to the present embodiment. FIG. 7 is a front view showing the coil component according to the present embodiment. 6 and 7, the exterior portion 30 is not shown.

片部１６の先端部分には、巻線９の端部が継線されている。これにより、対面部１２の上記両端部分のうち他方の端部分は、巻線９の端部が継線されることとなる。巻線９の各端部は、対応する片部１６の先端部分に絡げられた状態でレーザ溶接又はアーク溶接等により固定される。 The end of the winding 9 is connected to the tip of the piece 16. Thereby, the edge part of the coil | winding 9 will be connected to the other edge part among the said both ends of the facing part 12. FIG. Each end of the winding 9 is fixed by laser welding, arc welding, or the like in a state where it is entangled with the tip of the corresponding piece 16.

位置決め部１９は、三つの片部１６〜１８のうちＹ方向で両側に位置する片部１６，１８の途中部分から当該片部１６，１８が伸びる方向（Ｚ方向）と交差する方向（本実施形態においては、Ｚ方向に直交するＹ方向）に伸びている。すなわち、位置決め部１９は、対面部１２における、鍔部５，７の主面５ｂ，７ｂに平行で且つＺ方向に直交するＹ方向での両端部分からそれぞれ伸びている。位置決め部１９の先端部分も、鍔部５，７の主面５ｂ，７ｂに直交する方向から見て、鍔部５，７の主面５ｂ，７ｂの輪郭よりも外側に位置している。 The positioning part 19 is a direction (this embodiment) that intersects the direction (Z direction) in which the piece parts 16 and 18 extend from the middle part of the piece parts 16 and 18 located on both sides in the Y direction among the three piece parts 16 to 18. In the form, it extends in the Y direction perpendicular to the Z direction. That is, the positioning portion 19 extends from both end portions of the facing portion 12 in the Y direction parallel to the main surfaces 5b and 7b of the flange portions 5 and 7 and perpendicular to the Z direction. The distal end portion of the positioning portion 19 is also located outside the contours of the main surfaces 5b and 7b of the flange portions 5 and 7 when viewed from the direction orthogonal to the main surfaces 5b and 7b of the flange portions 5 and 7.

端子部２０は、対面部１２の上記一方の端部分からＸ方向に延びている。端子部２０は、対面部１２から直角に折り曲げて形成されている。端子部２０は、対面部１２の上記一方の端部分の縁全体に亘って形成されている。端子部２０は、コイル部品Ｃ１をＺ方向から実装基板ＭＢに搭載したときに、その実装基板ＭＢに配置された接続端子Ｔに接続される部分である。 The terminal portion 20 extends in the X direction from the one end portion of the facing portion 12. The terminal portion 20 is formed by being bent at a right angle from the facing portion 12. The terminal portion 20 is formed over the entire edge of the one end portion of the facing portion 12. The terminal portion 20 is a portion connected to the connection terminal T arranged on the mounting substrate MB when the coil component C1 is mounted on the mounting substrate MB from the Z direction.

ところで、基部１４及び端子部２０は、鍔部５，７の主面５ｂ，７ｂに直交する方向から見て、鍔部５，７の主面５ｂ，７ｂにおける各片部１６〜１８が伸びる方向（Ｚ方向）での中心線ＣＬを挟んで一方の側に位置し、各片部１６〜１８の先端部分は、中心線ＣＬを挟んで他方の側に位置している。すなわち、各切り欠き部２２は、鍔部５，７の主面５ｂ，７ｂに直交する方向から見て、鍔部５，７の主面５ｂ，７ｂのＺ方向での中心線ＣＬを越える位置まで伸びている。 By the way, when the base 14 and the terminal part 20 are seen from the direction orthogonal to the main surfaces 5b and 7b of the collar parts 5 and 7, the direction in which each piece 16-18 in the main surfaces 5b and 7b of the collar parts 5 and 7 extends. It is located on one side across the center line CL in the (Z direction), and the tip portions of the pieces 16 to 18 are located on the other side across the center line CL. That is, each notch 22 is located at a position exceeding the center line CL in the Z direction of the main surfaces 5b, 7b of the flanges 5, 7 when viewed from the direction orthogonal to the main surfaces 5b, 7b of the flanges 5, 7. It extends to.

再び、図１及び図２を参照する。外装部３０は、巻線９と巻芯１と一対の端子金具１０とのそれぞれ少なくとも一部を覆うように配置されている。外装部３０は、巻線９と片部１６とが継線された部分２４も覆っており、当該部分２４を保護している。外装部３０は、樹脂（例えば、シリコーン樹脂等）からなり、樹脂成型により形成される。外装部３０の外形は略角柱状となっており、表面実装の際に吸着面として機能する外装部３０の頂面３０ａは略平坦面となっている。外装部３０には、位置決め部１９に向けて窪んだ窪み３２が設けられている。 Again referring to FIG. 1 and FIG. The exterior portion 30 is disposed so as to cover at least a part of each of the winding 9, the core 1, and the pair of terminal fittings 10. The exterior portion 30 also covers a portion 24 where the winding 9 and the piece portion 16 are connected, and protects the portion 24. The exterior part 30 consists of resin (for example, silicone resin etc.), and is formed by resin molding. The outer shape of the exterior part 30 is a substantially prismatic shape, and the top surface 30a of the exterior part 30 that functions as an adsorption surface during surface mounting is a substantially flat surface. The exterior portion 30 is provided with a recess 32 that is recessed toward the positioning portion 19.

次に、上述したコイル部品Ｃ１を作製する手順について、図８〜図１７を参照しつつ説明する。図８〜１０、及び図１３〜１７は、本実施形態に係るコイル部品の一製造段階を示す図である。図１１及び図１２は、本実施形態に係るコイル部品の製作に用いる型を示す図である。 Next, a procedure for producing the coil component C1 described above will be described with reference to FIGS. 8 to 10 and FIGS. 13 to 17 are views showing one stage of manufacturing the coil component according to the present embodiment. 11 and 12 are diagrams showing a mold used for manufacturing the coil component according to the present embodiment.

まず、図８に示されるように、上述した形状の巻芯１を準備する。そして、図９に示されるように、巻芯１に一対の端子金具１０を取り付ける。ここでは、対面部１２又は鍔部５，７の主面５ｂ，７ｂの少なくともいずれか一方に接着材料を付着させ、端子金具１０の対面部１２が鍔部５，７の主面５ｂ，７ｂと対面するようにして、端子金具１０を、その内側表面１０ｂの側から鍔部５，７に接着する。これにより、対面部１２と鍔部５，７とが接着されることとなり、巻芯１に一対の端子金具１０が固定される。 First, as shown in FIG. 8, the core 1 having the above-described shape is prepared. Then, as shown in FIG. 9, a pair of terminal fittings 10 are attached to the core 1. Here, an adhesive material is attached to at least one of the facing portion 12 or the main surfaces 5b and 7b of the flange portions 5 and 7, and the facing portion 12 of the terminal fitting 10 is connected to the main surfaces 5b and 7b of the flange portions 5 and 7; The terminal fitting 10 is bonded to the flange portions 5 and 7 from the inner surface 10b side so as to face each other. As a result, the facing portion 12 and the flange portions 5 and 7 are bonded together, and the pair of terminal fittings 10 are fixed to the core 1.

次に、端子金具１０を巻芯１に取り付けた後、図１０に示されるように、巻芯１の巻回部３に巻線９を巻き付ける。そして、レーザ溶接又はアーク溶接等により、巻線９の各端部を端子金具１０の片部１６の先端部分に継線する。これにより、巻芯１に端子金具１０及び巻線９が取り付けられたコイル中間体４０が得られる。図１０では、説明のため、巻線の一方の端部は、端子金具１０の片部１６の先端部分に絡げた状態としている。 Next, after attaching the terminal fitting 10 to the core 1, the winding 9 is wound around the winding portion 3 of the core 1 as shown in FIG. 10. And each end part of the coil | winding 9 is connected to the front-end | tip part of the one part 16 of the terminal metal fitting 10 by laser welding or arc welding. Thereby, the coil intermediate body 40 in which the terminal fitting 10 and the winding 9 are attached to the core 1 is obtained. In FIG. 10, for explanation, one end of the winding is in a state of being entangled with the tip of the piece 16 of the terminal fitting 10.

次に、図１１及び図１２に示されるように、外装部形成用の型５０を準備する。型５０には、外装部３０の形状に対応する略四角形断面のキャビティ５２が設けられている。このキャビティ５２は、コイル中間体４０全体を収容することができる程度の寸法となっている。キャビティ５２の底面５２ａは平坦面となっており、キャビティ５２の四隅部それぞれには、その全長に亘って高さｈ_１の台座部５４が形成されている。 Next, as shown in FIG. 11 and FIG. 12, a mold 50 for forming an exterior part is prepared. The mold 50 is provided with a cavity 52 having a substantially square cross section corresponding to the shape of the exterior portion 30. The cavity 52 has a size that can accommodate the entire coil intermediate 40. Bottom 52a of the cavity 52 is a flat surface, each corner portion of the cavity 52, the pedestal portion 54 of a height h ₁ is formed along its entire length.

そして、図１３に示されるように、型５０のキャビティ５２の中に、外装部３０となるべき樹脂６０を所定量（キャビティ５２が３分の２ほど埋まる程度の量）だけ注入した後、キャビティ５２の中にコイル中間体４０を片部１６〜１８の先端部分側から入れてコイル中間体４０を樹脂６０に浸す。このとき、図１４及び図１５に示されるように、キャビティ５２の四隅部に設けられた台座部５４に、端子金具１０の対面部１２の各位置決め部１９が当接する。図１４及び図１５では、図面を見やすくするため、樹脂６０の図示を省略している。 Then, as shown in FIG. 13, after a predetermined amount of resin 60 to be the exterior portion 30 is injected into the cavity 52 of the mold 50 (an amount enough to fill the cavity 52 by about two thirds), The coil intermediate body 40 is put into the 52 from the front end side of the pieces 16 to 18, and the coil intermediate body 40 is immersed in the resin 60. At this time, as shown in FIGS. 14 and 15, each positioning portion 19 of the facing portion 12 of the terminal fitting 10 contacts the pedestal portion 54 provided at the four corners of the cavity 52. In FIGS. 14 and 15, the resin 60 is not shown for easy viewing of the drawings.

図１５に示されるように、台座部５４の高さｈ_１の長さは、対面部１２の片部１６と巻線９とが継線された部分２４から位置決め部１９までの長さｄ_１よりも長くなっており、巻線９と片部１６とが継線された部分２４がキャビティ５２の底面５２ａから所定長さだけ離間する。このようにして、コイル中間体４０は、位置決め部１９により、４点（四隅）において安定的に支持される。また、巻線９と片部１６とが継線された部分２４が、樹脂６０に覆われることとなる。 As shown in FIG. 15, the height h ₁ of the pedestal portion 54 is the length d ₁ from the portion 24 where the piece 16 of the facing portion 12 and the winding 9 are connected to the positioning portion 19. The portion 24 where the winding 9 and the piece 16 are connected is separated from the bottom surface 52a of the cavity 52 by a predetermined length. In this way, the coil intermediate body 40 is stably supported by the positioning portion 19 at four points (four corners). Further, the portion 24 where the winding 9 and the piece 16 are connected is covered with the resin 60.

図１１及び図１２に示されるように、キャビティ５２を画成する五つの面のうちキャビティ５２の長手方向に対向する面には、キャビティ５２の深さ方向に伸びる突部５６が形成されている。突部５６は、キャビティ５２内における、キャビティ５２の長手方向でのコイル中間体４０の位置を規定する。これにより、端子金具１０の外側表面１０ａが樹脂６０に確実に覆われることとなる。 As shown in FIG. 11 and FIG. 12, a protrusion 56 extending in the depth direction of the cavity 52 is formed on the surface facing the longitudinal direction of the cavity 52 among the five surfaces defining the cavity 52. . The protrusion 56 defines the position of the coil intermediate body 40 in the longitudinal direction of the cavity 52 in the cavity 52. As a result, the outer surface 10 a of the terminal fitting 10 is reliably covered with the resin 60.

その後、樹脂６０に対して熱硬化処理を施し、樹脂６０をコイル中間体４０に固着させる。 Thereafter, a thermosetting process is performed on the resin 60 to fix the resin 60 to the coil intermediate body 40.

最後に、型５０からコイル中間体４０を取りだして、コイル中間体４０に外装部３０が形成されたコイル部品Ｃ１が完成する（図１６及び図１７参照）。このように、型５０を用いて外装部３０を形成することで、従来のモールド成形では必要であった成形機を準備する必要がなくなり、成形設備の簡素化や成形作業の簡略化等を図ることができる。 Finally, the coil intermediate body 40 is taken out from the mold 50, and the coil component C1 in which the exterior portion 30 is formed on the coil intermediate body 40 is completed (see FIGS. 16 and 17). Thus, by forming the exterior part 30 using the mold 50, it is not necessary to prepare a molding machine that is necessary in the conventional molding, and simplification of molding equipment, simplification of molding work, and the like are achieved. be able to.

ここで、コイル部品Ｃ１に生じる渦電流について説明する。コイル部品Ｃ１には、巻回部３に巻き付けられた巻線９に電流が流れると、端子金具１０の対面部１２に略直交する方向に磁場が生じる。そして、端子金具１０の対面部１２には、その磁場の変化に起因してその面内に渦電流が生じる。この渦電流は、交流損失やインダクタンス等の特性を劣化させてしまうため、極力低減させる必要がある。 Here, the eddy current generated in the coil component C1 will be described. When a current flows through the coil 9 wound around the winding portion 3, a magnetic field is generated in the coil component C <b> 1 in a direction substantially orthogonal to the facing portion 12 of the terminal fitting 10. And the eddy current arises in the surface 12 resulting from the change of the magnetic field in the facing part 12 of the terminal metal fitting 10. Since this eddy current deteriorates characteristics such as AC loss and inductance, it is necessary to reduce it as much as possible.

上記コイル部品Ｃ１においては、基部１４から伸びる各片部１６〜１８が互いに所定の間隔を有している、すなわち対面部１２には切り欠き部２２が形成されているので、上記渦電流が流れる部分の面積の縮小を図り、それによって渦電流の影響を効果的に抑制している。 In the coil component C1, the pieces 16 to 18 extending from the base portion 14 have a predetermined distance from each other, that is, the notched portion 22 is formed in the facing portion 12, so that the eddy current flows. The area of the portion is reduced, thereby effectively suppressing the influence of eddy currents.

対面部１２に切り欠き部２２が形成されていない構成を備えるコイル部品の場合、対面部１２に比較的大きな経路の渦電流ＥＣ（図７中、一点鎖線で表す）が生じてしまい、コイル部品の特性に大きな影響を及ぼす。そこで、コイル部品Ｃ１においては、各片部１６〜１８の間の所定の間隔、すなわち切り欠き部２２により、上述したような渦電流ＥＣの経路を分断して、その発生を回避している。 In the case of a coil component having a configuration in which the notch portion 22 is not formed in the facing portion 12, an eddy current EC (represented by a one-dot chain line in FIG. 7) of a relatively large path is generated in the facing portion 12, and the coil component. It greatly affects the characteristics of Therefore, in the coil component C1, the path of the eddy current EC as described above is divided by a predetermined interval between the respective pieces 16 to 18, that is, the notch 22, to avoid the occurrence thereof.

以上のことから、本実施形態に係るコイル部品Ｃ１は、交流損失やインダクタンス等の特性の向上が図られており、高い特性を実現することができる。 From the above, the coil component C1 according to the present embodiment has improved characteristics such as AC loss and inductance, and can achieve high characteristics.

本実施形態では、基部１４及び端子部２０は、鍔部５，７の主面５ｂ，７ｂに直交する方向から見て、鍔部５，７の主面５ｂ，７ｂの中心線ＣＬを挟んで一方の側に位置し、各片部１６〜１８の先端部分は、中心線ＣＬを挟んで他方の側に位置している。すなわち、各切り欠き部２２は、鍔部５，７の主面５ｂ，７ｂに直交する方向から見て、鍔部５，７の主面５ｂ，７ｂの中心線ＣＬを越える位置まで伸びている。これにより、各片部１６〜１８の長さ（切り欠き部２２）が比較的長くなり、端子金具１０において渦電流が発生する部分をより一層低減することができる。この結果、コイル部品Ｃ１では、交流損失やインダクタンス等の特性を更に向上する。 In the present embodiment, the base portion 14 and the terminal portion 20 sandwich the center line CL of the main surfaces 5b, 7b of the flange portions 5, 7 when viewed from the direction orthogonal to the main surfaces 5b, 7b of the flange portions 5, 7. Located on one side, the tip portions of the pieces 16 to 18 are located on the other side across the center line CL. That is, each notch 22 extends to a position exceeding the center line CL of the main surfaces 5b, 7b of the flanges 5, 7 when viewed from the direction orthogonal to the main surfaces 5b, 7b of the flanges 5, 7. . Thereby, the length (notch part 22) of each piece parts 16-18 becomes comparatively long, and the part which an eddy current generate | occur | produces in the terminal metal fitting 10 can be reduced further. As a result, the coil component C1 further improves characteristics such as AC loss and inductance.

本実施形態では、片部１６の先端部分は、鍔部５，７の主面５ｂ，７ｂの輪郭より外側に位置している。これにより、片部１６の先端部分と巻線９とを継線する際に、巻芯１の鍔部５，７が支障となるようなことはなく、片部１６の先端部分と巻線９との継線を容易に行なうことが可能な構成を実現することができる。 In the present embodiment, the tip end portion of the piece portion 16 is located outside the contours of the main surfaces 5b and 7b of the flange portions 5 and 7. Thereby, when connecting the front-end | tip part of the piece part 16, and the coil | winding 9, the collar parts 5 and 7 of the core 1 do not become obstructive, and the front-end | tip part of the piece part 16 and the coil | winding 9 It is possible to realize a configuration that can be easily connected to.

本実施形態では、対面部１２は、位置決め部１９を更に含んでいる。これにより、コイル中間体４０の位置決めを容易に行なうことができる。 In the present embodiment, the facing portion 12 further includes a positioning portion 19. Thereby, positioning of the coil intermediate body 40 can be performed easily.

以上、本発明の好適な実施形態について説明してきたが、本発明は必ずしも上述した実施形態に限定されるものではなく、その要旨を逸脱しない範囲で様々な変更が可能である。 The preferred embodiments of the present invention have been described above. However, the present invention is not necessarily limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention.

例えば、端子金具１０の態様は、例えば図１８及び図１９に示す態様等に変更することができる。図１８及び図１９に示された端子金具１０では、対面部１２は二つの片部１６，１８を含んでおり、対面部１２には一つの切り欠き部２２が形成されることとなる。また、対面部１２は、四つ以上の片部を含んでいてもよい。 For example, the mode of the terminal fitting 10 can be changed to the mode shown in FIGS. 18 and 19, for example. In the terminal fitting 10 shown in FIGS. 18 and 19, the facing portion 12 includes two pieces 16, 18, and one notch portion 22 is formed in the facing portion 12. Further, the facing portion 12 may include four or more pieces.

本実施形態では、切り欠き部２２は、鍔部５，７の主面５ｂ，７ｂに直交する方向から見て、鍔部５，７の主面５ｂ，７ｂの中心線ＣＬを越える位置まで伸びているがこれに限られない。例えば、切り欠き部２２は、鍔部５，７の主面５ｂ，７ｂに直交する方向から見て、鍔部５，７の主面５ｂ，７ｂの中心線ＣＬを越えていなくてもよい。しかしながら、この場合には、渦電流の発生を抑制する効果が薄れてしまうことから、本実施形態のように、切り欠き部２２は、鍔部５，７の主面５ｂ，７ｂに直交する方向から見て、鍔部５，７の主面５ｂ，７ｂの中心線ＣＬを越える位置まで伸びていることが好ましい。 In the present embodiment, the notch 22 extends to a position exceeding the center line CL of the main surfaces 5b, 7b of the flanges 5, 7 when viewed from the direction orthogonal to the main surfaces 5b, 7b of the flanges 5, 7. However, it is not limited to this. For example, the notch 22 does not have to exceed the center line CL of the main surfaces 5b, 7b of the flanges 5, 7 when viewed from the direction orthogonal to the main surfaces 5b, 7b of the flanges 5, 7. However, in this case, since the effect of suppressing the generation of eddy current is diminished, the notch 22 is in a direction orthogonal to the main surfaces 5b and 7b of the flanges 5 and 7, as in the present embodiment. When viewed from the top, it preferably extends to a position exceeding the center line CL of the main surfaces 5b, 7b of the flanges 5,7.

本実施形態では、各片部１６〜１８の先端部分が、鍔部５，７の主面５ｂ，７ｂに直交する方向から見て、鍔部５，７の主面５ｂ，７ｂの輪郭より外側に位置しているが、これに限られない。例えば、片部１７，１８の先端部分は、鍔部５，７の主面５ｂ，７ｂに直交する方向から見て、鍔部５，７の主面５ｂ，７ｂの輪郭の内側に位置していてもよい。 In the present embodiment, the tip portions of the pieces 16 to 18 are outside the contours of the main surfaces 5b and 7b of the flanges 5 and 7 when viewed from the direction orthogonal to the main surfaces 5b and 7b of the flanges 5 and 7. However, it is not limited to this. For example, the tip portions of the pieces 17 and 18 are located inside the contours of the main surfaces 5b and 7b of the flanges 5 and 7 when viewed from the direction orthogonal to the main surfaces 5b and 7b of the flanges 5 and 7. May be.

巻芯１の巻回部３や鍔部５，７の断面形状は、円形に限らず、必要に応じて四角形等に変更してもよい。また、端子金具１０の切り欠き部２２の延在方向（片部１６〜１８が伸びる方向）は、コイル部品Ｃ１の高さ方向（Ｚ方向）に限らず、この方向から所定角度だけ傾いた方向であってもよい。 The cross-sectional shape of the winding part 3 and the flange parts 5 and 7 of the core 1 is not limited to a circle, but may be changed to a square or the like as necessary. Further, the extending direction of the cutout portion 22 of the terminal fitting 10 (the direction in which the pieces 16 to 18 extend) is not limited to the height direction (Z direction) of the coil component C1, and is a direction inclined by a predetermined angle from this direction. It may be.

本実施形態に係るコイル部品を示す斜視図である。It is a perspective view which shows the coil components which concern on this embodiment. 本実施形態に係るコイル部品を示す斜視図である。It is a perspective view which shows the coil components which concern on this embodiment. 図１のIII−III線に沿った断面構成を示す図である。It is a figure which shows the cross-sectional structure along the III-III line of FIG. 端子金具を示す斜視図である。It is a perspective view which shows a terminal metal fitting. 端子金具を示す正面図である。It is a front view which shows a terminal metal fitting. 本実施形態に係るコイル部品を示す側面図である。It is a side view which shows the coil components which concern on this embodiment. 本実施形態に係るコイル部品を示す正面図である。It is a front view which shows the coil components which concern on this embodiment. 本実施形態に係るコイル部品の一製造段階を示す図である。It is a figure which shows one manufacture stage of the coil components which concern on this embodiment. 本実施形態に係るコイル部品の一製造段階を示す図である。It is a figure which shows one manufacture stage of the coil components which concern on this embodiment. 本実施形態に係るコイル部品の一製造段階を示す図である。It is a figure which shows one manufacture stage of the coil components which concern on this embodiment. 本実施形態に係るコイル部品の製作に用いる型を示す図である。It is a figure which shows the type | mold used for manufacture of the coil components which concern on this embodiment. 本実施形態に係るコイル部品の製作に用いる型を示す図である。It is a figure which shows the type | mold used for manufacture of the coil components which concern on this embodiment. 本実施形態に係るコイル部品の一製造段階を示す図である。It is a figure which shows one manufacture stage of the coil components which concern on this embodiment. 本実施形態に係るコイル部品の一製造段階を示す図である。It is a figure which shows one manufacture stage of the coil components which concern on this embodiment. 本実施形態に係るコイル部品の一製造段階を示す図である。It is a figure which shows one manufacture stage of the coil components which concern on this embodiment. 本実施形態に係るコイル部品の一製造段階を示す図である。It is a figure which shows one manufacture stage of the coil components which concern on this embodiment. 本実施形態に係るコイル部品の一製造段階を示す図である。It is a figure which shows one manufacture stage of the coil components which concern on this embodiment. 端子金具の変形例を示す図である。It is a figure which shows the modification of a terminal metal fitting. 端子金具の変形例を示す図である。It is a figure which shows the modification of a terminal metal fitting.

Explanation of symbols

１…巻芯、３…巻回部、５，７…鍔部、９…巻線、１０…端子金具、１２…対面部、１４…基部、１６〜１８…片部、１９…位置決め部、２０…端子部、２２…切り欠き部、３０…外装部、Ｃ１…コイル部品。
DESCRIPTION OF SYMBOLS 1 ... Winding core, 3 ... Winding part, 5,7 ... Gutter part, 9 ... Winding, 10 ... Terminal metal fitting, 12 ... Face part, 14 ... Base part, 16-18 ... Single part, 19 ... Positioning part, 20 ... Terminal part, 22 ... Notch part, 30 ... Exterior part, C1 ... Coil component.

Claims

Windings,
A winding core having a pair of end faces facing each other and circular, the winding being wound;
A pair of terminal fittings attached to each end face of the core, and
Each terminal fitting is
A facing portion arranged to face the end surface of the core;
A terminal portion to be connected to the connection terminal provided on the mounting substrate, continuous to the facing portion;
The facing portion is
A base continuous with the terminal portion;
And at least two pieces extending from the base at a predetermined distance from each other,
The tip portion of one of the at least two pieces is located outside the outline of the end surface of the core and the direction in which each piece in the outline extends as seen from the axial direction of the core. A coil component, wherein the coil part is located at a position that is parallel to the end face and shifted in a direction perpendicular to a direction in which each piece extends, and the end of the winding is connected.

The terminal portion and the base portion are located on one side across a center line in a direction in which each piece portion on the end surface extends, as viewed from a direction orthogonal to the end surface,
2. The coil component according to claim 1, wherein tip portions of the at least two pieces are located on the other side of the center line.

3. The coil component according to claim 1, wherein the facing portion further includes a positioning portion extending from a middle portion of each of the at least two pieces in a direction intersecting with a direction in which the piece extends. 4. .

Windings,
A winding core having a pair of end faces facing each other and circular, the winding being wound;
A pair of terminal fittings attached to each end face of the core, and
Each terminal fitting is
The facing portion is disposed so as to face the end surface of the core, and both end portions in a first direction parallel to the end surface are positioned outside the contour of the end surface of the core;
A terminal portion to be connected to a connection terminal provided on the mounting substrate, continuous to one end portion of the both end portions of the facing portion;
The other end portion of the both end portions of the facing portion is connected to the end portion of the winding,
The facing portion is formed with a notch that extends from the other end portion of the facing portion toward the one end portion,
The portion where the end portion of the winding in the facing portion is connected is located outside the contour of the end surface of the core, and the notch portion in the contour is seen from the axial direction of the core. A coil component, wherein the coil component is positioned so as to be shifted from an outermost position in an extending direction in a direction parallel to the end face and perpendicular to a direction in which the notch extends .

5. The coil component according to claim 4, wherein the cutout portion extends to a position exceeding a center line in the first direction of the end surface when viewed from a direction orthogonal to the end surface.

6. The coil according to claim 4, wherein the facing portion includes positioning portions respectively extending from both end portions in a second direction parallel to the end surface and perpendicular to the first direction. parts.

And further comprising an exterior part disposed to cover at least a part of each of the winding, the core and the pair of terminal fittings,
The coil component according to claim 3 or 6, wherein the positioning portion abuts on a mold used when the exterior portion is resin-molded.

The coil component according to claim 7, wherein the exterior portion is provided with a recess that is recessed toward the positioning portion.