JP7013903B2 - Coil parts - Google Patents

Coil parts Download PDF

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JP7013903B2
JP7013903B2 JP2018018568A JP2018018568A JP7013903B2 JP 7013903 B2 JP7013903 B2 JP 7013903B2 JP 2018018568 A JP2018018568 A JP 2018018568A JP 2018018568 A JP2018018568 A JP 2018018568A JP 7013903 B2 JP7013903 B2 JP 7013903B2
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plate
shaped core
core
flange portion
portions
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JP2019135759A (en
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一彦 竹中
滋人 山本
良太 橋本
啓雄 五十嵐
勇貴 神戸
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Murata Manufacturing Co Ltd
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Murata Manufacturing Co Ltd
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Description

本発明は、コイル部品に関する。 The present invention relates to coil components.

従来、コイル部品として、ドラムコアの巻芯部に一対のワイヤが巻回され、ワイヤの端末をそれぞれドラムコアの鍔部に設けた電極部に電気的に接続されるコモンモードチョークコイルが知られている(例えば、特許文献1参照)。このようなコモンモードチョークコイルでは、各ワイヤの端末である引き出し線をコアの鍔部の電極と電気的に接続するようになっている。また、鍔部における電極が形成される面とは反対側の面に磁性材料からなる板状コアを接着固定したものがある(例えば、特許文献2参照)。 Conventionally, as a coil component, a common mode choke coil is known in which a pair of wires are wound around a winding core portion of a drum core, and terminals of the wires are electrically connected to an electrode portion provided on a flange portion of the drum core. (See, for example, Patent Document 1). In such a common mode choke coil, the lead wire which is the end of each wire is electrically connected to the electrode of the flange portion of the core. Further, there is a case in which a plate-shaped core made of a magnetic material is adhesively fixed to a surface of the flange portion opposite to the surface on which the electrode is formed (see, for example, Patent Document 2).

特開2014-75533号公報Japanese Unexamined Patent Publication No. 2014-75533 特開2017-85181号公報JP-A-2017-85181

ところで、上記のようなコモンモードチョークコイル等のコイル部品では、板状コアと鍔部とを接着固定する際に板状コアと鍔部との固着状態を確実に維持するために多く接着剤を塗布することがあり、接着剤が外部に零れる虞がある。接着剤が板状コアや鍔部の外部に零れた状態で固化すると、外観形状を損なったり、意図しない製品の大型化を招く虞がある。 By the way, in coil parts such as the common mode choke coil as described above, when the plate-shaped core and the flange portion are adhered and fixed, a large amount of adhesive is used to surely maintain the fixed state between the plate-shaped core and the flange portion. It may be applied and the adhesive may spill to the outside. If the adhesive solidifies in a state where it spills to the outside of the plate-shaped core or the flange, the appearance shape may be impaired or the size of the product may be unintentionally increased.

本発明は上記問題点を解決するためになされたものであって、その目的は、外観形状を損なうことを抑えるとともに意図しない大型化を抑えられるコイル部品を提供することにある。 The present invention has been made to solve the above problems, and an object of the present invention is to provide a coil component that can suppress the appearance shape from being impaired and can suppress an unintended increase in size.

上記課題を解決するコイル部品は、巻芯部と該巻芯部の両端に設けられた一対の鍔部を有するドラムコアと、前記一対の鍔部のそれぞれに設けられた電極と、前記巻芯部に巻回されるとともに引き出し部が前記電極と電気的に接続されたワイヤと、前記一対の鍔部に対して跨るように接着固定される板状の板状コアとを有し、前記一対の鍔部及び前記板状コアの少なくとも一方は、自身の少なくとも1つ稜線部が該稜線部を挟む両面の延長面が交差する仮想稜線部よりも内側に位置して接着剤を貯留する貯留部を有する。 Coil parts that solve the above problems include a drum core having a winding core portion and a pair of flange portions provided at both ends of the winding core portion, electrodes provided on each of the pair of flange portions, and the winding core portion. The pair has a wire that is wound around the electrode and the drawer portion is electrically connected to the electrode, and a plate-shaped plate-shaped core that is adhesively fixed so as to straddle the pair of flange portions. At least one of the flange portion and the plate-shaped core is a storage portion located inside the virtual ridge portion where at least one ridge portion of itself intersects the extension surfaces of both sides sandwiching the ridge portion to store the adhesive. Has.

この構成によれば、接着剤を貯留する貯留部を有することで、板状コアとドラムコアとを接着固定する際に接着剤が外部に流動しようとした場合でも稜線部に位置する貯留部に貯留することができる。このため、板状コアやドラムコアの外形寸法よりも外側に接着剤が零れることが抑えられ、外観形状を損なうことを抑えるとともにコイル部品の意図しない大型化を抑えることができる。 According to this configuration, by having a storage portion for storing the adhesive, even if the adhesive tries to flow to the outside when the plate-shaped core and the drum core are bonded and fixed, the storage portion is stored in the storage portion located at the ridgeline portion. can do. Therefore, it is possible to prevent the adhesive from spilling to the outside of the external dimensions of the plate-shaped core and the drum core, to prevent the appearance shape from being impaired, and to suppress the unintentional increase in size of the coil parts.

上記コイル部品において、前記板状コアにおける前記鍔部の並設方向に沿った長さは、前記一対の鍔部の端面間における長さよりも長いことが好ましい。
この構成によれば、板状コアの長さを鍔部の長さよりも長くすることで並設方向に沿った長さ方向において板状コアと鍔部との当接位置がずれた場合であっても鍔部が板状コアよりも外側にはみ出すことによるコイル部品の大型化を抑えることができ、さらに、板状コアと鍔部とを確実に当接させることができ、L値のばらつきを抑えることができる。
In the coil component, the length of the plate-shaped core along the parallel direction of the flange portions is preferably longer than the length between the end faces of the pair of flange portions.
According to this configuration, by making the length of the plate-shaped core longer than the length of the flange portion, the contact position between the plate-shaped core and the flange portion is deviated in the length direction along the parallel arrangement direction. However, it is possible to suppress the increase in size of the coil parts due to the flange portion protruding outside the plate-shaped core, and further, the plate-shaped core and the flange portion can be reliably brought into contact with each other, resulting in variations in the L value. It can be suppressed.

上記コイル部品において、前記板状コアと前記鍔部との当接方向及び前記鍔部の並設方向と直交する方向に沿った前記板状コアの幅は、前記板状コアと前記鍔部との当接方向及び前記鍔部の並設方向と直交する方向に沿った前記鍔部の幅よりも長いことが好ましい。 In the coil component, the width of the plate-shaped core along the contact direction between the plate-shaped core and the flange portion and the direction orthogonal to the parallel arrangement direction of the flange portions is the width of the plate-shaped core and the flange portion. It is preferable that the width of the flange portion is longer than the width of the flange portion along the contact direction of the collar portion and the direction orthogonal to the parallel arrangement direction of the flange portions.

この構成によれば、板状コアの幅を鍔部の幅よりも長くすることで幅方向において板状コアと鍔部との当接位置がずれた場合であっても鍔部が板状コアよりも外側にはみ出すことによるコイルの大型化を抑えることができ、さらに、板状コアと鍔部とを確実に当接させることができ、L値のばらつきを抑えることができる。 According to this configuration, by making the width of the plate-shaped core longer than the width of the flange portion, the flange portion is the plate-shaped core even when the contact position between the plate-shaped core and the flange portion is deviated in the width direction. It is possible to suppress the increase in size of the coil due to the protrusion of the coil to the outside, and further, the plate-shaped core and the flange portion can be reliably brought into contact with each other, and the variation in the L value can be suppressed.

上記コイル部品において、前記貯留部は、前記一対の鍔部及び前記板状コアの両方に設けられることが好ましい。
この構成によれば、一対の鍔部及び板状コアの両方に貯留部が設けられるため、鍔部及び板状コアの両方の貯留部で接着剤を貯留することができる。
In the coil component, it is preferable that the storage portion is provided in both the pair of flange portions and the plate-shaped core.
According to this configuration, since the storage portions are provided in both the pair of flange portions and the plate-shaped core, the adhesive can be stored in both the flange portions and the plate-shaped core storage portions.

上記コイル部品において、前記鍔部の前記貯留部の貯留領域は前記板状コアの前記貯留部の貯留領域よりも大きいことが好ましい。
この構成によれば、鍔部の貯留部の貯留領域を、板状コアの貯留部の貯留領域よりも大きくすることで、鍔部側に接着剤を多く流動できる。
In the coil component, it is preferable that the storage area of the storage portion of the flange portion is larger than the storage region of the storage portion of the plate-shaped core.
According to this configuration, by making the storage area of the storage portion of the flange portion larger than the storage region of the storage portion of the plate-shaped core, a large amount of adhesive can flow to the flange portion side.

上記コイル部品において、前記鍔部の前記稜線部は、曲面形状であることが好ましい。
この構成によれば、鍔部の稜線部を曲面形状としてコイル部品の意図しない大型化を抑えられる。
In the coil component, the ridgeline portion of the flange portion preferably has a curved surface shape.
According to this configuration, the ridgeline portion of the flange portion is formed into a curved surface shape, and the unintended increase in size of the coil component can be suppressed.

上記コイル部品において、前記鍔部の前記稜線部は、窪み形状であることが好ましい。
この構成によれば、鍔部の稜線部を窪み形状としてコイル部品の意図しない大型化を抑えられる。
In the coil component, it is preferable that the ridgeline portion of the flange portion has a recessed shape.
According to this configuration, the ridgeline portion of the flange portion is formed into a recessed shape, and the unintended increase in size of the coil component can be suppressed.

上記コイル部品において、前記鍔部の前記稜線部は、C面形状であることが好ましい。
この構成によれば、鍔部の稜線部をC面形状としてコイル部品の意図しない大型化を抑えられる。
In the coil component, the ridgeline portion of the flange portion preferably has a C-plane shape.
According to this configuration, the ridgeline portion of the flange portion is formed into a C-plane shape, and the unintended increase in size of the coil component can be suppressed.

上記コイル部品において、前記一対の鍔部の稜線部は、その曲率半径が30μm以上100μm以下の範囲の曲面であることが好ましい。
この構成によれば、稜線部の曲率半径を30μm以上とすることで漏れる接着剤を十分留めることができ、100μm以下とすることで鍔部と板状コアとの接合強度を確保することができる。
In the coil component, the ridgeline portion of the pair of flange portions is preferably a curved surface having a radius of curvature of 30 μm or more and 100 μm or less.
According to this configuration, when the radius of curvature of the ridgeline portion is 30 μm or more, the leaking adhesive can be sufficiently fastened, and when it is 100 μm or less, the joint strength between the flange portion and the plate-shaped core can be secured. ..

本発明のコイル部品によれば、外観形状を損なうことを抑えるとともに意図しない大型化が抑えられる。 According to the coil component of the present invention, it is possible to suppress the appearance shape from being impaired and to suppress an unintended increase in size.

第1実施形態におけるコイル部品の斜視図。The perspective view of the coil component in 1st Embodiment. 同実施形態におけるコイル部品の下面図。The bottom view of the coil component in the same embodiment. 同実施形態におけるコイル部品の側面図。The side view of the coil component in the same embodiment. 同実施形態におけるコイル部品の正面図。The front view of the coil component in the same embodiment. (a)~(d)は同実施形態におけるドラムコアの形状の一例を示す断面図。(A) to (d) are sectional views showing an example of the shape of the drum core in the same embodiment. 同実施形態におけるドラムコアの鍔部におけるめっき構造を示す断面図。The cross-sectional view which shows the plating structure in the flange part of the drum core in the same embodiment. (a)(b)同実施形態における鍔部及び板状コアの稜線部について説明するための説明図。(A) (b) Explanatory drawing for explaining the flange portion and the ridge line portion of the plate-shaped core in the same embodiment. 第2実施形態におけるコイル部品の斜視図。The perspective view of the coil component in 2nd Embodiment. 同実施形態におけるドラムコアの斜視図。The perspective view of the drum core in the same embodiment. 同実施形態におけるスロープとコイルとの関係を説明するための断面図。The cross-sectional view for demonstrating the relationship between a slope and a coil in the same embodiment. 第3実施形態におけるコイル部品の斜視図。The perspective view of the coil component in 3rd Embodiment. 同実施形態におけるドラムコアの斜視図。The perspective view of the drum core in the same embodiment. 変形例におけるコイル部品の斜視図。The perspective view of the coil component in the modification. 変形例におけるドラムコアの鍔部におけるめっき構造を示す断面図。The cross-sectional view which shows the plating structure in the flange part of the drum core in the modification.

(第1実施形態)
以下、第1実施形態を説明する。なお、添付図面は、理解を容易にするために構成要素を拡大して示している場合がある。構成要素の寸法比率は実際のものと、または別の図面中のものと異なる場合がある。
(First Embodiment)
Hereinafter, the first embodiment will be described. It should be noted that the attached drawings may show enlarged components for ease of understanding. The dimensional ratios of the components may differ from the actual ones or those in another drawing.

図1に示すように、コイル部品10は、例えばコモンモードチョークコイルである。コイル部品10は、ドラムコア11と、ドラムコア11に取り付けられる板状コア41と、ドラムコア11に巻回された第1及び第2ワイヤ51,52とを有する。 As shown in FIG. 1, the coil component 10 is, for example, a common mode choke coil. The coil component 10 has a drum core 11, a plate-shaped core 41 attached to the drum core 11, and first and second wires 51 and 52 wound around the drum core 11.

図1に示すように、ドラムコア11は、直方体状の巻芯部21と、巻芯部21の両端部に設けられる一対の鍔部31とを有する。これら巻芯部21と一対の鍔部31は一体形成されている。 As shown in FIG. 1, the drum core 11 has a rectangular parallelepiped winding core portion 21 and a pair of flange portions 31 provided at both ends of the winding core portion 21. The winding core portion 21 and the pair of flange portions 31 are integrally formed.

ここで、本明細書では、図1~図4に示すように、一対の鍔部31が並ぶ方向(並設方向)を「長さ方向Ld」と定義し、板状コア41の主面に直交する方向であって板状コア41とドラムコア11の鍔部31とが当接する方向を「高さ方向(厚み方向)Td」と定義し、「長さ方向Ld」及び「高さ方向Td」のいずれにも直交する方向を「幅方向Wd」と定義する。 Here, in the present specification, as shown in FIGS. 1 to 4, the direction in which the pair of flanges 31 are lined up (parallel arrangement direction) is defined as the "length direction Ld", and is defined as the main surface of the plate-shaped core 41. The direction in which the plate-shaped core 41 and the flange portion 31 of the drum core 11 are in contact with each other in the orthogonal direction is defined as "height direction (thickness direction) Td", and is defined as "length direction Ld" and "height direction Td". The direction orthogonal to any of the above is defined as "width direction Wd".

本例のドラムコア11は、NiCuZnフェライト等の磁性体材料で構成される。
図1及び図2に示すように、巻芯部21は、その周囲に第1及び第2ワイヤ51,52が巻回されるようになっている。
The drum core 11 of this example is made of a magnetic material such as NiCuZn ferrite.
As shown in FIGS. 1 and 2, the winding core portion 21 is configured such that the first and second wires 51 and 52 are wound around the winding core portion 21.

巻芯部21は、例えば、長さ方向Ldに延在した直方体状に形成されている。巻芯部21の中心軸は、長さ方向Ldに略平行に延在している。巻芯部21は、高さ方向Tdにおいて相対向する一対の主面21a,21bと、幅方向Wdにおいて相対向する一対の側面21c,21dとを有している。ここで、主面21a,21bは、高さ方向Tdにおいて板状コア41側ではない側を主面21a、高さ方向Tdにおいて板状コア41側を主面21bとする。 The winding core portion 21 is formed in a rectangular parallelepiped shape extending in the length direction Ld, for example. The central axis of the winding core portion 21 extends substantially parallel to Ld in the length direction. The winding core portion 21 has a pair of main surfaces 21a and 21b facing each other in the height direction Td, and a pair of side surfaces 21c and 21d facing each other in the width direction Wd. Here, as for the main surfaces 21a and 21b, the side that is not the plate-shaped core 41 side in the height direction Td is the main surface 21a, and the plate-shaped core 41 side in the height direction Td is the main surface 21b.

なお、本明細書において、「直方体状」には、角部や稜線部が面取り(C面取り)された直方体や、角部や稜線部が適宜R面となるように丸められた直方体、角部や稜線部が凹んだ直方体が含まれたものとする。また、主面及び側面の一部又は全部に凹凸などが形成されていてもよい。図5(a)~図5(d)に巻芯部21の断面形状の一例を示す。図5(a)に示す巻芯部21は、角部21fが角形状の凹みを有する。図5(b)に示す巻芯部21は、角部21fが曲面形状となるようなR面取りされている。図5(c)に示す巻芯部21は、角部21fがC面取りされた形状(C面形状)となっている。図5(d)に示す巻芯部21は、断面が八角形(非正八角形)形状をなすように構成される。いずれの構成であっても、断面が長方形(角部が90度)をなす構成と比較して後述するワイヤ51,52を巻芯部21に巻回する場合、角部21fに位置するワイヤ51,52の状態が鈍角となる。このため、巻芯部が長方形(矩形)の場合よりも、ワイヤ51,52が巻きぶくれせず、巻芯部21に対してより近接させて巻回することが可能となる。 In the present specification, the term "rectangular parallelepiped" refers to a rectangular parallelepiped in which the corners and ridges are chamfered (C chamfered), and the rectangular parallelepipeds and squares in which the corners and ridges are appropriately rounded to form an R surface. It is assumed that a rectangular parallelepiped with a dented ridgeline is included. Further, unevenness or the like may be formed on a part or all of the main surface and the side surface. 5 (a) to 5 (d) show an example of the cross-sectional shape of the winding core portion 21. In the winding core portion 21 shown in FIG. 5A, the corner portion 21f has a square-shaped recess. The winding core portion 21 shown in FIG. 5B is R-chamfered so that the corner portion 21f has a curved surface shape. The winding core portion 21 shown in FIG. 5C has a C-chamfered shape (C-plane shape) at the corner portion 21f. The winding core portion 21 shown in FIG. 5D is configured to have an octagonal (non-regular octagonal) cross section. In any configuration, when the wires 51 and 52, which will be described later, are wound around the core portion 21, the wire 51 located at the corner portion 21f is compared with the configuration in which the cross section is rectangular (the corners are 90 degrees). The state of, 52 becomes an obtuse angle. Therefore, as compared with the case where the winding core portion is rectangular (rectangular), the wires 51 and 52 do not bulge and can be wound closer to the winding core portion 21.

図1~図4に示すように、一対の各鍔部31は、長さ方向Ldに短い直方体状に形成されている。各鍔部31は、高さ方向Td及び幅方向Wdに向かって巻芯部21の周囲に張り出すように形成されている。具体的には、長さ方向Ldから見たときの各鍔部31の平面形状は、巻芯部21に対して高さ方向Td及び幅方向Wdに張り出すように形成されている。 As shown in FIGS. 1 to 4, each pair of flange portions 31 is formed in a rectangular parallelepiped shape short in the length direction Ld. Each flange portion 31 is formed so as to project around the winding core portion 21 toward Td in the height direction and Wd in the width direction. Specifically, the planar shape of each flange portion 31 when viewed from the length direction Ld is formed so as to project in the height direction Td and the width direction Wd with respect to the winding core portion 21.

各鍔部31は、長さ方向Ldにおいて相対向する一対の主面31a,31bと、幅方向Wdにおいて相対向する一対の側面31c,31dと、高さ方向Tdにおいて相対向する一対の側面31e,31fとを有している。各鍔部31の主面31aは、長さ方向Ldにおいて巻芯部21とは反対側(長さ方向Ldにおいてドラムコア11の外側)に面する。ここで、鍔部31の主面31aは、鍔部31の端面に相当する。各鍔部31の主面31bは、長さ方向Ldにおいて巻芯部21側(長さ方向Ldにおいてドラムコア11の内側)に面する。つまり、各鍔部31の主面31b同士は、互いに対向する対向面に相当する。 Each flange portion 31 has a pair of main surfaces 31a and 31b facing each other in the length direction Ld, a pair of side surfaces 31c and 31d facing each other in the width direction Wd, and a pair of side surfaces 31e facing each other in the height direction Td. , 31f and so on. The main surface 31a of each flange portion 31 faces the side opposite to the winding core portion 21 in the length direction Ld (outside of the drum core 11 in the length direction Ld). Here, the main surface 31a of the flange portion 31 corresponds to the end surface of the flange portion 31. The main surface 31b of each flange portion 31 faces the winding core portion 21 side (inside the drum core 11 in the length direction Ld) in the length direction Ld. That is, the main surfaces 31b of each flange portion 31 correspond to facing surfaces facing each other.

各鍔部31は、図示しない基板に対して実装する側面31f側に、離間する2つの実装面32a,32bと、2つの実装面32a,32bを区切る中央窪み部33と、前記中央窪み部33とは反対側において実装面32a,32bと隣接する外側窪み部34a,34bをそれぞれ有する。実装面32a,32bは、中央窪み部33及び外側窪み部34a,34bよりも高さ方向Tdに突出するように構成される。また、本例において実装面32a,32bから巻芯部21の主面21aまでの距離が約0.1~0.5mmに設定されている。 Each flange portion 31 has two mounting surfaces 32a and 32b separated from each other on the side surface 31f side to be mounted on a substrate (not shown), a central recess 33 separating the two mounting surfaces 32a and 32b, and the central recess 33. It has outer recesses 34a and 34b adjacent to the mounting surfaces 32a and 32b on the opposite side to the mounting surface 32a and 32b, respectively. The mounting surfaces 32a and 32b are configured to protrude in the height direction Td from the central recess 33 and the outer recesses 34a and 34b. Further, in this example, the distance from the mounting surfaces 32a and 32b to the main surface 21a of the winding core portion 21 is set to about 0.1 to 0.5 mm.

また、各鍔部31は、スロープ35を有する。スロープ35は、巻芯部21の軸方向における主面21aの端部からほぼ段差無しで鍔部31の外側窪み部34bまで連続するような直線形状の斜面である。本例のスロープ35の傾斜角度は、巻芯部21の主面21aの幅方向Wdに対して、5~20度の範囲に設定され、図1~図4に示すように約14度であることが好ましい。ここで、例えばスロープ35の傾斜角度が低いとワイヤ51,52がスロープ35から浮きやすくなり、スロープ35の傾斜角度が高いと圧着後にワイヤ51,52に負荷がかかりにくく、前述の傾斜角度とすることでワイヤ51,52の浮きやワイヤ51,52への適切な負荷を付与することができる。 Further, each flange portion 31 has a slope 35. The slope 35 is a straight slope that is continuous from the end of the main surface 21a in the axial direction of the winding core portion 21 to the outer recessed portion 34b of the flange portion 31 with almost no step. The inclination angle of the slope 35 of this example is set in the range of 5 to 20 degrees with respect to the width direction Wd of the main surface 21a of the winding core portion 21, and is about 14 degrees as shown in FIGS. 1 to 4. Is preferable. Here, for example, if the inclination angle of the slope 35 is low, the wires 51 and 52 are likely to float from the slope 35, and if the inclination angle of the slope 35 is high, the wires 51 and 52 are less likely to be loaded after crimping, and the above-mentioned inclination angle is used. As a result, the float of the wires 51 and 52 and an appropriate load on the wires 51 and 52 can be applied.

図3に示すように、各鍔部31を側面視した際(鍔部31の並設方向である長さ方向Ldから見た際)に、前記スロープ35は、鍔部31の主面31aによって隠れる位置となっている。即ち、中央窪み部33よりも高さ方向Tdにおいて巻芯部21寄りにスロープ35が位置するようになっている。また、第1及び第2ワイヤ51,52は鍔部の並設方向から見て鍔部31の対向面である主面31bとは反対側の端面である主面31aによって隠れることとなるため、例えばモールドする際の樹脂が第1及び第2ワイヤ51,52に接触することを防止でき、衝撃やモールド樹脂が膨張・収縮しても、第1及び第2ワイヤ51,52が引っ張られることがなく断線を防ぐことができる。さらに、スロープ35は、実装面32a,32bに平行な方向から見て隠れている。このような構成とすることで、同方向へのワイヤ51,52(後述する引き出し部51b,52b)の露出が抑えられる。 As shown in FIG. 3, when each flange portion 31 is viewed from the side (when viewed from the length direction Ld which is the parallel direction of the flange portions 31), the slope 35 is formed by the main surface 31a of the flange portion 31. It is in a hidden position. That is, the slope 35 is located closer to the winding core portion 21 in the height direction Td than the central recess portion 33. Further, since the first and second wires 51 and 52 are hidden by the main surface 31a which is the end surface opposite to the main surface 31b which is the facing surface of the flange portion 31 when viewed from the parallel direction of the flange portion. For example, it is possible to prevent the resin during molding from coming into contact with the first and second wires 51 and 52, and the first and second wires 51 and 52 may be pulled even if an impact or the mold resin expands or contracts. It is possible to prevent disconnection. Further, the slope 35 is hidden when viewed from a direction parallel to the mounting surfaces 32a and 32b. With such a configuration, the exposure of the wires 51 and 52 (drawing portions 51b and 52b described later) in the same direction can be suppressed.

また、スロープ35は、巻芯部21側から鍔部31(外側窪み部34b)にかけて徐々に幅広形状となるように形成される。
一方の鍔部31の実装面32a,32b並びに外側窪み部34a,34bには、電極36a,36bが形成されている。より具体的には、隣接する実装面32a及び外側窪み部34a上に跨がって電極36aが形成され、隣接する実装面32b及び外側窪み部34b上に跨がって電極36bが形成されている。また、中央窪み部33によって実装面32a,32b同士が非導通状態となっている。これにより、一方の鍔部31に2つの電極36a,36bが形成される。
Further, the slope 35 is formed so as to gradually become a wide shape from the winding core portion 21 side to the flange portion 31 (outer recessed portion 34b).
Electrodes 36a and 36b are formed on the mounting surfaces 32a and 32b of one of the flange portions 31 and the outer recessed portions 34a and 34b. More specifically, the electrode 36a is formed over the adjacent mounting surface 32a and the outer recessed portion 34a, and the electrode 36b is formed over the adjacent mounting surface 32b and the outer recessed portion 34b. There is. Further, the mounting surfaces 32a and 32b are in a non-conducting state due to the central recess 33. As a result, two electrodes 36a and 36b are formed on one flange portion 31.

また、他方の鍔部31の実装面32a,32b並びに外側窪み部34a,34bには、端子電極36a,36bが形成されている。より具体的には、隣接する実装面32a及び外側窪み部34a上に跨がって電極36aが形成され、隣接する実装面32b及び外側窪み部34b上に跨がって電極36bが形成されている。また、中央窪み部33によって実装面32a,32b同士が非導通状態となっている。これにより、他方の鍔部31に2つの電極36a,36bが形成される。 Further, terminal electrodes 36a and 36b are formed on the mounting surfaces 32a and 32b of the other flange portion 31 and the outer recessed portions 34a and 34b. More specifically, the electrode 36a is formed over the adjacent mounting surface 32a and the outer recessed portion 34a, and the electrode 36b is formed over the adjacent mounting surface 32b and the outer recessed portion 34b. There is. Further, the mounting surfaces 32a and 32b are in a non-conducting state due to the central recess 33. As a result, two electrodes 36a and 36b are formed on the other flange portion 31.

一方の鍔部31の電極36aは、幅方向Wdにおいて他方の鍔部31の電極36aと逆側に位置する。一方の鍔部31の電極36bは、幅方向Wdにおいて他方の鍔部31の電極36bと逆側に位置する。また、電極36bは、前述したように外側窪み部34b側、すなわちスロープ35の終端側に位置する。なお、各鍔部31の電極36a,36bは、各図においてドット模様(梨地模様)で示している。 The electrode 36a of one flange portion 31 is located on the opposite side of the electrode 36a of the other flange portion 31 in the width direction Wd. The electrode 36b of one flange portion 31 is located on the opposite side of the electrode 36b of the other flange portion 31 in the width direction Wd. Further, the electrode 36b is located on the outer recessed portion 34b side, that is, on the terminal side of the slope 35 as described above. The electrodes 36a and 36b of each flange portion 31 are shown in a dot pattern (pear-skin pattern) in each figure.

そして、各電極36a,36bには後述する第1及び第2ワイヤ51,52の引き出し部51a,51b,52a,52bが電気的に接続される。
図3及び図4に示すように、鍔部31は、前記電極36a,36bが形成される面とは反対側の側面31eの周囲の稜線部31h,31iがR面取りされて曲面形状となっている。
Then, the lead-out portions 51a, 51b, 52a, 52b of the first and second wires 51, 52, which will be described later, are electrically connected to the electrodes 36a, 36b.
As shown in FIGS. 3 and 4, the flange portion 31 has a curved surface shape in which the ridge line portions 31h and 31i around the side surface 31e on the side opposite to the surface on which the electrodes 36a and 36b are formed are R-chamfered. There is.

具体的には、図7(a)に示すように、稜線部31hは、鍔部31の主面31a上を通って該主面31aに沿った延長面SL1と、鍔部31の側面31e上を通って該側面31eに沿った延長面SL2とが交差する仮想稜線部よりも鍔部31の中心側に凹んだ形状となっている。つまり、稜線部の断面形状での角度が90度とした場合と比較して鍔部31の稜線部31hが鍔部31の中心側に窪んだ形状となっている。 Specifically, as shown in FIG. 7A, the ridge line portion 31h passes over the main surface 31a of the flange portion 31 and is on the extension surface SL1 along the main surface 31a and on the side surface 31e of the flange portion 31. The shape is recessed toward the center of the flange portion 31 with respect to the virtual ridge portion that passes through and intersects the extension surface SL2 along the side surface 31e. That is, the ridgeline portion 31h of the flange portion 31 is recessed toward the center side of the flange portion 31 as compared with the case where the angle of the cross-sectional shape of the ridgeline portion is 90 degrees.

また、図7(b)に示すように、稜線部31iは、鍔部31の側面31c,31d上を通って該側面31c,31dに沿った延長面SL3と、鍔部31の側面31e上を通って該側面31eに沿った延長面SL4とを基準とした仮想稜線部よりも鍔部31の中心側に凹んだ形状となっている。つまり、稜線部を所謂ピン角とした場合と比較して鍔部31の稜線部31iが鍔部31の中心側に窪んだ形状となっている。本例の稜線部31h,31iは、例えば曲率半径を30μm以上、100μm以下とする。 Further, as shown in FIG. 7B, the ridge line portion 31i passes over the side surfaces 31c and 31d of the flange portion 31 and extends on the extension surface SL3 along the side surfaces 31c and 31d and on the side surface 31e of the flange portion 31. The shape is recessed toward the center of the flange portion 31 from the virtual ridge portion with respect to the extension surface SL4 along the side surface 31e. That is, the ridgeline portion 31i of the flange portion 31 has a shape recessed toward the center side of the flange portion 31 as compared with the case where the ridgeline portion has a so-called pin angle. The ridge line portions 31h and 31i of this example have, for example, a radius of curvature of 30 μm or more and 100 μm or less.

上述したように各稜線部31h,31iを窪ませた形状とすることで、後述する製造時に塗布される接着剤が流動した場合に稜線部31h,31iにスペースS1,S2が存在するため、スペースS1,S2が接着剤を貯留する貯留部として作用し、外部に接着剤が流れ出すことを抑えることができる。なお、貯留部としてのスペースS1,S2に必ずしも接着剤が貯留される必要は無い。 By forming the ridges 31h and 31i in a recessed shape as described above, spaces S1 and S2 exist in the ridges 31h and 31i when the adhesive applied at the time of manufacturing described later flows. S1 and S2 act as a storage portion for storing the adhesive, and it is possible to prevent the adhesive from flowing out to the outside. It should be noted that the adhesive does not necessarily have to be stored in the spaces S1 and S2 as the storage portions.

上記のように構成されたドラムコア11の長さ方向Ldに沿った長さ寸法L1は、約1.2~約4.5mmの範囲に設定される。また、ドラムコア11の高さ方向Tdに沿った高さ寸法(高さ方向Tdに沿った鍔部31の実装面32a,32bから側面31eまでの高さ寸法)T1は、約0.5~約2.1mmの範囲に設定される。ドラムコア11の幅方向Wdに沿った幅寸法(鍔部31の幅方向Wdに沿った幅寸法)W1は、1.0~3.2mmの範囲に設定される。 The length dimension L1 along the length direction Ld of the drum core 11 configured as described above is set in the range of about 1.2 to about 4.5 mm. Further, the height dimension along the height direction Td of the drum core 11 (height dimension from the mounting surfaces 32a and 32b of the flange portion 31 along the height direction Td to the side surface 31e) T1 is about 0.5 to about. It is set in the range of 2.1 mm. The width dimension (width dimension along the width direction Wd of the flange portion 31) W1 along the width direction Wd of the drum core 11 is set in the range of 1.0 to 3.2 mm.

図1~図4に示すように、板状コア41は、例えば、一対の鍔部31に跨るように接着剤によって接着固定される。板状コア41は、磁性体材料又は非磁性体材料で構成することができる。板状コア41を設けることで、コイル部品10を基板に実装する際に自動装着機の吸着ノズルで吸着することが容易となる。また、板状コア41をフェライト等の磁性体材料で構成した場合に、同じくフェライトで形成されたドラムコア11と板状コア41とで閉磁路を形成することができるため、漏れ磁束の低減などが期待できる。 As shown in FIGS. 1 to 4, the plate-shaped core 41 is adhesively fixed by an adhesive so as to straddle, for example, a pair of flanges 31. The plate-shaped core 41 can be made of a magnetic material or a non-magnetic material. By providing the plate-shaped core 41, it becomes easy to suck the coil component 10 with the suction nozzle of the automatic mounting machine when mounting the coil component 10 on the substrate. Further, when the plate-shaped core 41 is made of a magnetic material such as ferrite, a closed magnetic circuit can be formed by the drum core 11 also formed of ferrite and the plate-shaped core 41, so that the leakage flux can be reduced. You can expect it.

本例の板状コア41の長さ方向Ldに沿った長さ寸法L4は、ドラムコア11の長さ寸法L1よりもやや長くなっている。また、板状コア41の高さ方向Tdに沿った高さ寸法T3は、0.15~1.0mmの範囲に設定される。板状コア41の幅方向Wdに沿った幅寸法W3は、ドラムコア11(鍔部31)の幅寸法W1よりもやや長くなっている。 The length dimension L4 along the length direction Ld of the plate-shaped core 41 of this example is slightly longer than the length dimension L1 of the drum core 11. Further, the height dimension T3 along the height direction Td of the plate-shaped core 41 is set in the range of 0.15 to 1.0 mm. The width dimension W3 along the width direction Wd of the plate-shaped core 41 is slightly longer than the width dimension W1 of the drum core 11 (flange portion 31).

ここで、板状コア41と長さ寸法L4とドラムコア11の長さ寸法L1との違いによるL値の変化について説明する。以下の表1及び表2に示すように、ドラムコア11の長さ寸法L1に対して板状コア41の長さ寸法L4を、0.1mm短くした場合(表1中の「-0.1」)、同じ長さとした場合、0.1mm長くした場合(表1中の「0.1」)の3パターンにおいて、ドラムコアの板状コアに対する長さ方向Ldのズレ量を変化させた場合のL値の変化量並びに変化率(%)を調査した。なお長さ方向Ldのズレ量は、ズレがない場合と、所定の位置(ズレがない位置)から0.1mmずらした場合を示しており、一対の鍔部31の両方が0.1mmずつずれるため計0.2mmのズレがあるとして表1には「0.2」として示している。 Here, the change in the L value due to the difference between the plate-shaped core 41, the length dimension L4, and the length dimension L1 of the drum core 11 will be described. As shown in Tables 1 and 2 below, when the length dimension L4 of the plate-shaped core 41 is shortened by 0.1 mm with respect to the length dimension L1 of the drum core 11 (“−0.1” in Table 1). ), L when the deviation amount in the length direction with respect to the plate-shaped core of the drum core is changed in the three patterns of the same length and 0.1 mm longer (“0.1” in Table 1). The amount of change in the value and the rate of change (%) were investigated. The amount of deviation of Ld in the length direction indicates a case where there is no deviation and a case where the deviation is 0.1 mm from a predetermined position (the position where there is no deviation), and both of the pair of flanges 31 are displaced by 0.1 mm. Therefore, it is shown as "0.2" in Table 1 because there is a total deviation of 0.2 mm.

Figure 0007013903000001
Figure 0007013903000001

Figure 0007013903000002
表1並びに表2からわかるように、板状コア41の長さ寸法L4をドラムコア11の長さ寸法L1よりも長くした場合、長さ方向Ldに対してドラムコアと板状コアとが相対的にずれた場合でもL値の値がほとんど変わらない。このため、上述したように、板状コア41の長さ寸法L4をドラムコア11の長さ寸法L1よりも長く、又は、板状コア41の幅寸法W3をドラムコア11の幅寸法W1よりも長くすることで、寸法公差の範囲内で万一ドラムコアの長さ寸法L1やドラムコアの幅寸法W1の長さより長くなった場合であっても、ドラムコア11(鍔部31)と板状コア41との接触面積を十分に確保できるため、寸法公差に伴うL値のばらつきを抑えることができる。
Figure 0007013903000002
As can be seen from Tables 1 and 2, when the length dimension L4 of the plate-shaped core 41 is longer than the length dimension L1 of the drum core 11, the drum core and the plate-shaped core are relatively relative to Ld in the length direction. Even if it deviates, the L value does not change much. Therefore, as described above, the length dimension L4 of the plate-shaped core 41 is made longer than the length dimension L1 of the drum core 11, or the width dimension W3 of the plate-shaped core 41 is made longer than the width dimension W1 of the drum core 11. Therefore, even if the length of the drum core is longer than the length of the drum core L1 or the width of the drum core W1 within the range of the dimensional tolerance, the contact between the drum core 11 (flange portion 31) and the plate-shaped core 41 Since a sufficient area can be secured, it is possible to suppress variations in the L value due to dimensional tolerances.

図3及び図4に示すように、板状コア41の稜線部41a,41bは、凹んだ形状(切り欠いた形状)となっている。
具体的には、図7(a)に示すように、稜線部41aは、板状コア41の主面42上を通って該主面42に沿った延長面SL5と、板状コア41の端面43上を通って該端面43に沿った延長面SL6とを基準とした仮想稜線部よりも板状コア41の中心側に凹んだ形状となっている。つまり、稜線部を所謂ピン角とした場合と比較して板状コア41の稜線部41aが板状コア41の中心側に窪んだ形状となっている。
As shown in FIGS. 3 and 4, the ridges 41a and 41b of the plate-shaped core 41 have a concave shape (notched shape).
Specifically, as shown in FIG. 7A, the ridge line portion 41a has an extension surface SL5 that passes over the main surface 42 of the plate-shaped core 41 and is along the main surface 42, and an end surface of the plate-shaped core 41. It has a shape recessed toward the center of the plate-shaped core 41 with respect to the virtual ridge line portion that passes over 43 and is based on the extension surface SL6 along the end surface 43. That is, the ridgeline portion 41a of the plate-shaped core 41 is recessed toward the center of the plate-shaped core 41 as compared with the case where the ridgeline portion has a so-called pin angle.

また、図7(b)に示すように、稜線部41bは、板状コア41の主面42上を通って該主面42に沿った延長面SL5と、板状コア41の側面44上を通って該側面44に沿った延長面SL7とが交差する仮想稜線部よりも板状コア41の中心側に凹んだ形状となっている。つまり、稜線部の断面形状での角度が90度とした場合と比較して板状コア41の稜線部41aが板状コア41の中心側に窪んだ形状となっている。 Further, as shown in FIG. 7B, the ridge line portion 41b passes over the main surface 42 of the plate-shaped core 41 and passes over the extension surface SL5 along the main surface 42 and the side surface 44 of the plate-shaped core 41. The shape is recessed toward the center of the plate-shaped core 41 from the virtual ridge line portion through which the extension surface SL7 along the side surface 44 intersects. That is, the ridgeline portion 41a of the plate-shaped core 41 is recessed toward the center side of the plate-shaped core 41 as compared with the case where the angle of the cross-sectional shape of the ridgeline portion is 90 degrees.

上述したように各稜線部41a,41bを窪ませた形状とすることで、接着剤が流動した場合に稜線部41a,41bにスペースS3,S4が存在するため、スペースS3,S4が接着剤を貯留する貯留部として作用し、外部に接着剤が流れ出すことを抑えることができる。なお、貯留部としてのスペースS3,S4に必ずしも接着剤が貯留される必要は無い。 Since the ridges 41a and 41b are recessed as described above, the spaces S3 and S4 are present in the ridges 41a and 41b when the adhesive flows, so that the spaces S3 and S4 provide the adhesive. It acts as a storage part to store and can prevent the adhesive from flowing out to the outside. It should be noted that the adhesive does not necessarily have to be stored in the spaces S3 and S4 as the storage portions.

また、稜線部31h,31iのスペースS1,S2の貯留領域Ar1,Ar3は、稜線部41a,41bのスペースS3,S4の貯留領域Ar2,Ar4よりも大きいことが好ましい。各貯留領域Ar1~Ar4は、各稜線部31h,31i,41a,41bを含む方向にドラムコア11及び板状コア41を切断した際の各スペースS1~S4の面積を意味している。なお、各稜線部31h,31i,41a,41bは、予め各図に示した形状で成型してもよいし、研磨等の後加工によって形成してもよい。このような構成とすることで、ドラムコア11(鍔部31)側のスペースに接着剤を多く導くことができる。そして、板状コア41の長さ寸法L4がドラムコア11の長さ寸法L1よりも長いため、接着剤をドラムコア11側に導くことでコイル部品10の長さ寸法における意図しない大型化を抑えることができる。また、板状コア41の幅寸法W3がドラムコア11の鍔部31の幅寸法W1よりも長いため、接着剤をドラムコア11側に導くことでコイル部品10の幅寸法の意図しない大型化を抑えることができる。 Further, it is preferable that the storage areas Ar1 and Ar3 of the spaces S1 and S2 of the ridges 31h and 31i are larger than the storage areas Ar2 and Ar4 of the spaces S3 and S4 of the ridges 41a and 41b. Each storage area Ar1 to Ar4 means the area of each space S1 to S4 when the drum core 11 and the plate-shaped core 41 are cut in the direction including the ridge line portions 31h, 31i, 41a, 41b. In addition, each ridge line portion 31h, 31i, 41a, 41b may be molded in the shape shown in each figure in advance, or may be formed by post-processing such as polishing. With such a configuration, a large amount of adhesive can be guided to the space on the drum core 11 (flange portion 31) side. Since the length dimension L4 of the plate-shaped core 41 is longer than the length dimension L1 of the drum core 11, the adhesive can be guided to the drum core 11 side to suppress an unintentional increase in the length dimension of the coil component 10. can. Further, since the width dimension W3 of the plate-shaped core 41 is longer than the width dimension W1 of the flange portion 31 of the drum core 11, the adhesive is guided to the drum core 11 side to suppress the unintentional increase in the width dimension of the coil component 10. Can be done.

第1及び第2ワイヤ51,52は、被覆電線であり、巻芯部21に互いに同一の巻回方向で巻回されてコイル導体を構成する。第1及び第2ワイヤ51,52は、それぞれ例えば、直径約15~約80μmの範囲のものを用いることができ、一例としてそれぞれ約15μmの直径の被覆電線が用いられている。第1及び第2ワイヤ51,52は、互いに同一のターン数となるように巻芯部21に巻回されている。本例では、例えば第1及び第2ワイヤ51,52は、それぞれ16ターン(計32ターン)となるように巻回されている。 The first and second wires 51 and 52 are coated electric wires, and are wound around the core portion 21 in the same winding direction to form a coil conductor. As the first and second wires 51 and 52, for example, those having a diameter in the range of about 15 to about 80 μm can be used, and as an example, a covered electric wire having a diameter of about 15 μm is used. The first and second wires 51 and 52 are wound around the core portion 21 so as to have the same number of turns. In this example, for example, the first and second wires 51 and 52 are wound so as to have 16 turns (32 turns in total), respectively.

また、第1ワイヤ51の一方の端末である引き出し部51aは、一方の鍔部31の電極36aと接続され、第1ワイヤ51の他方の端末である引き出し部51bは、他方の鍔部31の電極36bと接続される。このとき、引き出し部51bは、スロープ35に沿った形状となっている。 Further, the pull-out portion 51a, which is one terminal of the first wire 51, is connected to the electrode 36a of one flange portion 31, and the pull-out portion 51b, which is the other terminal of the first wire 51, is connected to the other flange portion 31. It is connected to the electrode 36b. At this time, the drawer portion 51b has a shape along the slope 35.

第2ワイヤ52の一方の端末である引き出し部52aは、一方の鍔部31の電極36bと接続され、第2ワイヤ52の他方の端末である引き出し部52bは、他方の鍔部31の電極36aと接続される。このとき、引き出し部52bは、スロープ35に沿った形状となっている。 The pull-out portion 52a, which is one terminal of the second wire 52, is connected to the electrode 36b of one flange portion 31, and the pull-out portion 52b, which is the other terminal of the second wire 52, is connected to the electrode 36a of the other flange portion 31. Is connected to. At this time, the drawer portion 52b has a shape along the slope 35.

次に、上記のように構成されたコイル部品10の製造方法について説明する。
先ず、金型を用いてドラムコア11を形成する。
次いで、各鍔部31の実装面32a,32b並びに外側窪み部34a,34bに電極36a,36bを形成する。電極36a,36bは、各鍔部31の実装面32a,32b並びに外側窪み部34a,34bにAg(銀)等を例えばスクリーン印刷又はドライめっきすることで形成することが可能である。このとき、実装面32a,32b並びに外側窪み部34a,34bとは2回に分けてスクリーン印刷する方法やスクリーン印刷とドライめっきの両方を用いる方法が挙げられる。この時の実装面32a,32b並びに外側窪み部34a,34bにおける電極36a,36bの厚さは、ドライめっきの場合には約0.1~0.5μmに設定され、スクリーン印刷の場合には約10μm~約30μmに設定される。
Next, a method of manufacturing the coil component 10 configured as described above will be described.
First, the drum core 11 is formed using a mold.
Next, the electrodes 36a and 36b are formed on the mounting surfaces 32a and 32b of each flange portion 31 and the outer recessed portions 34a and 34b. The electrodes 36a and 36b can be formed by, for example, screen printing or dry plating Ag (silver) or the like on the mounting surfaces 32a and 32b of each flange portion 31 and the outer recessed portions 34a and 34b. At this time, a method of screen-printing the mounting surfaces 32a and 32b and the outer recessed portions 34a and 34b in two steps and a method of using both screen printing and dry plating can be mentioned. At this time, the thicknesses of the electrodes 36a and 36b on the mounting surfaces 32a and 32b and the outer recessed portions 34a and 34b are set to about 0.1 to 0.5 μm in the case of dry plating and about about 0.1 to 0.5 μm in the case of screen printing. It is set to 10 μm to about 30 μm.

次いで、鍔部31の主面31a(端面)に電極36a,36bを形成する。このとき、実装面32a,32b並びに外側窪み部34a,34bに形成された電極36a,36bと導通されるように形成する。電極36a,36bは、各鍔部31の主面31a(端面)に例えばAgをスクリーン印刷またはドライめっきすることで形成することが可能である。この時の主面31a(端面)における電極36a,36bの厚さは、ドライめっきの場合には約0.1~約0.5μmに設定され、スクリーン印刷の場合には約10μm~約30μmに設定される。 Next, the electrodes 36a and 36b are formed on the main surface 31a (end surface) of the flange portion 31. At this time, it is formed so as to be conductive with the electrodes 36a and 36b formed on the mounting surfaces 32a and 32b and the outer recessed portions 34a and 34b. The electrodes 36a and 36b can be formed by, for example, screen printing or dry plating Ag on the main surface 31a (end surface) of each flange portion 31. At this time, the thickness of the electrodes 36a and 36b on the main surface 31a (end surface) is set to about 0.1 to about 0.5 μm in the case of dry plating, and to about 10 μm to about 30 μm in the case of screen printing. Set.

次いで、めっき処理を施す。本例では、Cu(銅)めっき、Ni(ニッケル)めっき、Sn(錫)めっきの順でめっき処理が施される。つまり、鍔部31には、図6に示すように外側窪み部34a,34bから順に電極36a,36bを構成するAg層71の上に、Cuめっき層72、Niめっき層73、Snめっき層74の3層のめっき処理が施されることとなる。また、Niめっき層73とSnめっき層74との間に新たなCuめっき層を施してもよい。各めっき処理による各層の厚さは、約0.5~約15μmの範囲に設定され、より好ましくは、約1~10μmの範囲に設定される。なお、Snの代わりにAu(金)を使用してもよい。 Next, a plating process is performed. In this example, the plating process is performed in the order of Cu (copper) plating, Ni (nickel) plating, and Sn (tin) plating. That is, as shown in FIG. 6, the flange portion 31 has a Cu plating layer 72, a Ni plating layer 73, and a Sn plating layer 74 on the Ag layer 71 constituting the electrodes 36a and 36b in order from the outer recessed portions 34a and 34b. The three layers of plating will be applied. Further, a new Cu plating layer may be applied between the Ni plating layer 73 and the Sn plating layer 74. The thickness of each layer by each plating treatment is set in the range of about 0.5 to about 15 μm, and more preferably set in the range of about 1 to 10 μm. In addition, Au (gold) may be used instead of Sn.

次に、第1及び第2ワイヤ51,52を準備する。第1及び第2ワイヤ51,52は、例えばNiを含むCuNi合金ワイヤなどのCuを含んだワイヤを採用することができる。また、被覆はイミド変性ポリウレタンなどの樹脂材料を採用することができる。これにより、熱圧着時のSnめっき層74による、ワイヤ51,52のCu食われを抑制できる。 Next, the first and second wires 51 and 52 are prepared. As the first and second wires 51 and 52, a wire containing Cu such as a CuNi alloy wire containing Ni can be adopted. Further, a resin material such as imide-modified polyurethane can be used for the coating. As a result, it is possible to suppress Cu eating of the wires 51 and 52 by the Sn plating layer 74 during thermocompression bonding.

次いで、第1及び第2ワイヤ51,52を巻芯部21に巻回する。
次いで、第1及び第2ワイヤ51,52の引き出し部51a,51b,52a,52bにおける被覆を必要に応じて剥離する。剥離方法は特に問わないが、例えばレーザを用いて剥離することができる。また、例えば被覆の材料によって剥離する必要が無い場合には、この工程を省略することができる。
Next, the first and second wires 51 and 52 are wound around the core portion 21.
Next, the coatings on the lead-out portions 51a, 51b, 52a, 52b of the first and second wires 51, 52 are peeled off as needed. The peeling method is not particularly limited, but for example, a laser can be used for peeling. Further, for example, when it is not necessary to peel off due to the coating material, this step can be omitted.

次いで、第1及び第2ワイヤ51,52の引き出し部51a,51b,52a,52bを外側窪み部34a,34bの面と平行に引っ張った状態で例えば圧着によって外側窪み部34a,34bの電極36a,36bと電気的に接続する。圧着方法は特に問わないが、例えば、ヒータチップによる熱圧着を採用することができる。このとき、圧着時のワイヤ51,52(引き出し部51a,51b,52a,52b)の潰し量は50%未満である。この際、ヒータチップによる熱圧着によって少なくともSnめっき層74並びにNiめっき層73を横断してワイヤ51,52の引き出し部51a,51b,52a,52bがCuめっき層72と接触した状態となることが好ましい。この場合、Cu食われが発生した場合でもCuめっき層72からワイヤ51,52側に対してCuの供給が可能となるため、ワイヤ51,52が細くなることを抑えてワイヤ51,52の断線が抑えられる。 Next, in a state where the drawer portions 51a, 51b, 52a, 52b of the first and second wires 51, 52 are pulled in parallel with the surfaces of the outer recessed portions 34a, 34b, for example, by crimping, the electrodes 36a of the outer recessed portions 34a, 34b, Electrically connected to 36b. The crimping method is not particularly limited, but for example, thermocompression bonding using a heater chip can be adopted. At this time, the amount of crushing of the wires 51, 52 (drawing portions 51a, 51b, 52a, 52b) at the time of crimping is less than 50%. At this time, the drawing portions 51a, 51b, 52a, 52b of the wires 51, 52 may be in contact with the Cu plating layer 72 at least across the Sn plating layer 74 and the Ni plating layer 73 by thermocompression bonding with the heater chip. preferable. In this case, even if Cu is eaten, Cu can be supplied from the Cu plating layer 72 to the wires 51 and 52, so that the wires 51 and 52 are prevented from becoming thin and the wires 51 and 52 are disconnected. Is suppressed.

次いで、第1及び第2ワイヤ51,52の引き出し部51a,51b,52a,52bの端部を切断する。この時、第1及び第2ワイヤ51,52の引き出し部51a,51b,52a,52bの端部が主面31a及び側面31c,31dのいずれかから延びた状態(飛び出した状態)で切断することが好ましい。そして、切断後の引き出し部51a,51b,52a,52bの端部は、主面31a並びに側面31c,31dのいずれかに沿った状態となることがさらに好ましい。上述したように、主面31a及び側面31c,31dのいずれかから延びた状態の第1及び第2ワイヤ51,52の端部を切断するため、ドラムコア11の外側での切断となり、切断が容易となる。さらに、切断後の引き出し部51a,51b,52a,52bの端部がドラムコア11に沿う形状とすることで、コイル部品10全体の寸法に与える影響を小さくできる。また、引き出し部51a,51b,52a,52bの端部が主面31a並びに側面31c,31dまで延びることで、当該箇所においてワイヤ51,52とSnめっき層74とが接触状態とならない。 Next, the ends of the lead-out portions 51a, 51b, 52a, 52b of the first and second wires 51, 52 are cut. At this time, cutting is performed in a state where the ends of the lead-out portions 51a, 51b, 52a, 52b of the first and second wires 51, 52 extend from any of the main surface 31a and the side surfaces 31c, 31d (protruded state). Is preferable. Further, it is more preferable that the end portions of the drawer portions 51a, 51b, 52a, 52b after cutting are in a state along any of the main surface 31a and the side surfaces 31c, 31d. As described above, since the ends of the first and second wires 51 and 52 extending from any of the main surface 31a and the side surfaces 31c and 31d are cut, the cutting is performed on the outside of the drum core 11 and the cutting is easy. Will be. Further, by forming the ends of the drawn-out portions 51a, 51b, 52a, 52b after cutting along the drum core 11, the influence on the dimensions of the entire coil component 10 can be reduced. Further, since the ends of the lead-out portions 51a, 51b, 52a, 52b extend to the main surface 31a and the side surfaces 31c, 31d, the wires 51, 52 and the Sn plating layer 74 do not come into contact with each other at the portions.

次いで、ドラムコア11に板状コア41を貼り付ける。具体的には、鍔部31の側面31eにディスペンス又はピン転写により接着剤として樹脂を塗布する。そして、樹脂が塗布された側面31eに板状コア41を接触させて貼り付けることができる。 Next, the plate-shaped core 41 is attached to the drum core 11. Specifically, the resin is applied as an adhesive to the side surface 31e of the flange portion 31 by dispensing or pin transfer. Then, the plate-shaped core 41 can be brought into contact with the side surface 31e coated with the resin and attached.

次に、上記のコイル部品10が有する構造の作用を説明する。
本実施形態のコイル部品10では、鍔部31の主面31b側にスロープ35が設けられ、スロープ35に沿って引き出し部51b,52bが案内されるように、すなわち引き出し部51b,52bがスロープ35に沿った形状となっている。これによって、引き出し部51b,52bが撓んだりすることが抑えられている。また、スロープ35が側面視で鍔部31(主面31a)によって隠れるようになっているため、自ずと引き出し部51b,52bも側面視で鍔部31(主面31a)によって隠れることとなる。これにより、例えばモールドする際の樹脂が第1及び第2ワイヤ51,52に接触することを防止でき、衝撃やモールド樹脂が膨張・収縮しても、第1及び第2ワイヤ51,52が引っ張られることがなく断線を防ぐことができる。
Next, the operation of the structure of the coil component 10 will be described.
In the coil component 10 of the present embodiment, the slope 35 is provided on the main surface 31b side of the flange portion 31, and the drawer portions 51b and 52b are guided along the slope 35, that is, the drawer portions 51b and 52b are the slope 35. It has a shape that follows. As a result, the drawer portions 51b and 52b are prevented from bending. Further, since the slope 35 is hidden by the flange portion 31 (main surface 31a) in the side view, the drawer portions 51b and 52b are naturally hidden by the collar portion 31 (main surface 31a) in the side view. As a result, for example, it is possible to prevent the resin during molding from coming into contact with the first and second wires 51 and 52, and even if an impact or the mold resin expands or contracts, the first and second wires 51 and 52 are pulled. It is possible to prevent disconnection without being damaged.

また、各引き出し部51a,51b,52a,52bは、実装面32a,32bよりも窪んだ位置にある外側窪み部34a,34bに設けられるため、引き出し部51a,51b,52a,52bが実装時に基板等に触れることが抑えられるため、断線を抑えることができる。 Further, since the drawer portions 51a, 51b, 52a, 52b are provided in the outer recessed portions 34a, 34b located at positions recessed from the mounting surfaces 32a, 32b, the drawer portions 51a, 51b, 52a, 52b are mounted on the substrate at the time of mounting. Since it is possible to suppress touching such as, disconnection can be suppressed.

さらに、電極36a,36bをCuめっき層72、Niめっき層73、Snめっき層74の順で覆うことで、基板にコイル部品10を実装する際にはんだ濡れ性のよいSnめっき層74があることで電極36a,36bと基板(基板のランド)との接合性が向上する。また、例えばSnをAg層71にめっきしたのみだとSnが解けてAg層71の露出がおこり、二つの電極36a,36b間でAgのイオンマイグレーションが発生し、ショートのリスクとなる。このため、電極36a,36b上をNiめっき層73で覆うことでAgが移動しないようにする作用が生じるため、前述したようなショートを抑えることができる。ここで、Niめっき層73のNiは残留応力が高いため、電極36a,36bを構成するAg層71がドラムコア11から剥離する作用が生じる虞がある。そこで、Niめっき層73と電極36a,36bを構成するAg層71との間に比較的柔らかいCuめっき層72を介在させることで応力を緩和することが可能となる。加えて、コイル部品10は、鍔部31の稜線部31h.31iにスペースS1,S2を設け、板状コア41の稜線部41a,41bにスペースS3,S4を有することで、スペースS1,S2,S3,S4において接着剤を貯留することができるようになっている。スペースS1,S2,S3,S4に接着剤が貯留されることでコイル部品10の外形寸法に影響を与えることが抑えられ、外観形状を損なうことを抑えるとともにコイル部品10の意図しない大型化が抑えられている。 Further, by covering the electrodes 36a and 36b in the order of the Cu plating layer 72, the Ni plating layer 73, and the Sn plating layer 74, there is a Sn plating layer 74 having good solder wettability when mounting the coil component 10 on the substrate. This improves the bondability between the electrodes 36a and 36b and the substrate (land of the substrate). Further, for example, if Sn is only plated on the Ag layer 71, Sn is melted and the Ag layer 71 is exposed, and ion migration of Ag occurs between the two electrodes 36a and 36b, which poses a risk of short circuit. Therefore, by covering the electrodes 36a and 36b with the Ni plating layer 73, the action of preventing the Ag from moving occurs, so that the short circuit described above can be suppressed. Here, since Ni in the Ni plating layer 73 has a high residual stress, there is a possibility that the Ag layer 71 constituting the electrodes 36a and 36b may peel off from the drum core 11. Therefore, it is possible to relieve the stress by interposing a relatively soft Cu plating layer 72 between the Ni plating layer 73 and the Ag layer 71 constituting the electrodes 36a and 36b. In addition, the coil component 10 has a ridge line portion 31h. Of the flange portion 31. By providing the spaces S1 and S2 in the 31i and having the spaces S3 and S4 in the ridges 41a and 41b of the plate-shaped core 41, the adhesive can be stored in the spaces S1, S2, S3 and S4. There is. The accumulation of the adhesive in the spaces S1, S2, S3, and S4 suppresses the influence on the external dimensions of the coil component 10, suppresses the deterioration of the external shape, and suppresses the unintentional increase in size of the coil component 10. Has been done.

以上記述したように、本実施形態によれば、以下の効果を奏する。
(1)引き出し部51b,52bを電極36bに案内するスロープ35を鍔部31に備えることで、ワイヤ51,52(引き出し部51b,52b)の撓みを抑えてワイヤ51,52の断線を抑えることができる。
As described above, according to the present embodiment, the following effects are obtained.
(1) By providing the flange portion 31 with a slope 35 that guides the pull-out portions 51b and 52b to the electrode 36b, bending of the wires 51 and 52 (draw-out portions 51b and 52b) is suppressed and disconnection of the wires 51 and 52 is suppressed. Can be done.

(2)一対の鍔部31の両方にスロープ35が設けられることで、各鍔部31の電極36bに接続される第1及び第2ワイヤ51,52のそれぞれの引き出し部51b,52bの撓みを抑えて第1及び第2ワイヤ51,52の断線を抑えることができる。 (2) By providing the slopes 35 on both of the pair of flange portions 31, the bending of the drawer portions 51b and 52b of the first and second wires 51 and 52 connected to the electrodes 36b of each flange portion 31 can be prevented. It is possible to suppress the disconnection of the first and second wires 51 and 52.

(3)第1及び第2ワイヤ51,52が鍔部31の並設方向である長さ方向Ldから見て鍔部の対向面である主面31b側とは反対側の主面31aによって隠れる構成であるため、例えばコイル部品10を基板に実装した後に、コイル部品10の周囲を樹脂等でモールドする際に鍔部31側から樹脂が流入して第1及び第2ワイヤ51,52にモールド樹脂が至ることが抑えられる。ここで、例えば第1及び第2ワイヤ51,52にモールド樹脂が至ると、熱衝撃によってモールド樹脂が膨張並びに収縮することで第1及び第2ワイヤ51,52が引っ張られて断線する虞がある。そのため、前述したように第1及び第2ワイヤ51,52にモールド樹脂が至ることが抑えられることで第1及び第2ワイヤ51,52の断線が抑えられる。 (3) The first and second wires 51 and 52 are hidden by the main surface 31a opposite to the main surface 31b side which is the facing surface of the flange portion when viewed from the length direction Ld which is the parallel direction of the flange portion 31. Because of the configuration, for example, after the coil component 10 is mounted on the substrate, when the periphery of the coil component 10 is molded with a resin or the like, the resin flows in from the flange portion 31 side and is molded into the first and second wires 51 and 52. It is suppressed that the resin reaches. Here, for example, when the mold resin reaches the first and second wires 51 and 52, the mold resin expands and contracts due to thermal shock, and the first and second wires 51 and 52 may be pulled and broken. .. Therefore, as described above, the mold resin is suppressed from reaching the first and second wires 51 and 52, so that the disconnection of the first and second wires 51 and 52 is suppressed.

(4)鍔部31の並設方向である長さ方向Ld並びに電極36a,36bが面する方向である高さ方向Tdと直交する方向である幅方向Wdから見てスロープ35が隠れているため、同方向へのワイヤ51,52(引き出し部51b,52b)の露出が抑えられる。 (4) Because the slope 35 is hidden when viewed from the length direction Ld, which is the parallel direction of the flange portions 31, and the width direction Wd, which is the direction orthogonal to the height direction Td, which is the direction in which the electrodes 36a and 36b face. , The exposure of the wires 51, 52 (drawing portions 51b, 52b) in the same direction is suppressed.

(5)スロープ35に沿って引き出し部51b,52bが直線状に設けられることで、引き出し部51b,52bの撓み等が無くなり、ワイヤ51,52(引き出し部51b,52b)の断線を抑えることができる。 (5) By providing the drawers 51b and 52b in a straight line along the slope 35, bending of the drawers 51b and 52b can be eliminated, and disconnection of the wires 51 and 52 (drawers 51b and 52b) can be suppressed. can.

(6)電極36a,36bをCuめっき層72、Niめっき層73、Snめっき層74の順で覆うことで、Niめっき層73と電極36a,36b(Ag層71)との間に比較的柔らかいCuめっき層72を介在させることで応力を緩和することが可能となる。 (6) By covering the electrodes 36a and 36b in the order of the Cu plating layer 72, the Ni plating layer 73, and the Sn plating layer 74, the Ni plating layer 73 and the electrodes 36a and 36b (Ag layer 71) are relatively soft. The stress can be relaxed by interposing the Cu plating layer 72.

(7)ワイヤ51,52の引き出し部51a,51b,52a,52bがCuめっき層72と当接している。そして、本例のように引き出し部51a,51b,52a,52bを電極36a,36bに電気的に接続する際に熱圧着を用いることで発生する所謂Cu食いが発生してもCuめっき層72からCuの供給がされることとなるため、ワイヤ51,52が細くなることが抑えられる。その結果、ワイヤ51,52の接合状態の改善に寄与できる。 (7) The lead-out portions 51a, 51b, 52a, 52b of the wires 51 and 52 are in contact with the Cu plating layer 72. Then, even if so-called Cu erosion generated by using thermocompression bonding when the extraction portions 51a, 51b, 52a, 52b are electrically connected to the electrodes 36a, 36b as in this example is generated, the Cu plating layer 72 is used. Since Cu is supplied, it is possible to prevent the wires 51 and 52 from becoming thin. As a result, it can contribute to the improvement of the joining state of the wires 51 and 52.

(8)各めっき層の厚さは1~10μmの範囲とすることでワイヤの圧着を強固にすることが可能となる。
(9)ワイヤ51,52の引き出し部51a,51b,52a,52bが鍔部31の主面31a並びに側面31c,31dまで延びているため、引き出し部51a,51b,52a,52bの端部がSnめっき層74と接触することを抑えることができる。そのため、圧着部分の引き出し部51a,51b,52a,52bに対して引き出し部51a,51b,52a,52bの端部(Snめっき層74と接触しない部分)のCuを供給することができる。
(8) By setting the thickness of each plating layer in the range of 1 to 10 μm, it is possible to strengthen the crimping of the wire.
(9) Since the pull-out portions 51a, 51b, 52a, 52b of the wires 51, 52 extend to the main surface 31a and the side surfaces 31c, 31d of the flange portion 31, the ends of the pull-out portions 51a, 51b, 52a, 52b are Sn. Contact with the plating layer 74 can be suppressed. Therefore, Cu can be supplied to the drawer portions 51a, 51b, 52a, 52b of the crimping portion at the ends of the drawer portions 51a, 51b, 52a, 52b (the portions that do not come into contact with the Sn plating layer 74).

(10)接着剤を貯留する貯留部としてのスペースS1,S2,S3,S4を有することで、板状コア41とドラムコア11とを接着固定する際に接着剤が外部に流動しようとした場合でも稜線部31h,31i,41a,41bに位置するスペースS1,S2,S3,S4に貯留することができる。このため、板状コア41やドラムコア11の外形寸法よりも外側に接着剤が零れることが抑えられ、外観形状を損なうことを抑えるとともにコイル部品10の意図しない大型化を抑えることができる。 (10) By having the spaces S1, S2, S3, and S4 as storage portions for storing the adhesive, even when the adhesive tries to flow to the outside when the plate-shaped core 41 and the drum core 11 are adhered and fixed. It can be stored in the spaces S1, S2, S3, S4 located at the ridges 31h, 31i, 41a, 41b. Therefore, it is possible to prevent the adhesive from spilling to the outside of the external dimensions of the plate-shaped core 41 and the drum core 11, prevent the appearance shape from being impaired, and suppress the unintentional increase in size of the coil component 10.

(11)板状コア41の長さ寸法L4を鍔部31の長さ寸法L1よりも長くすることで長さ方向において板状コア41と鍔部31との当接位置がずれた場合であっても板状コア41と鍔部31とを確実に当接させることができ、L値のばらつきを抑えることができる。 (11) A case where the contact position between the plate-shaped core 41 and the flange portion 31 is displaced in the length direction by making the length dimension L4 of the plate-shaped core 41 longer than the length dimension L1 of the flange portion 31. However, the plate-shaped core 41 and the flange portion 31 can be reliably brought into contact with each other, and variations in the L value can be suppressed.

(12)板状コア41の幅寸法W3を鍔部31の幅寸法W1よりも長くすることで幅方向において板状コア41と鍔部31との当接位置がずれた場合であっても鍔部31が板状コア41よりも外側にはみ出すことによるコイル部品10の大型化を抑えることができる。さらに、板状コア41と鍔部31とを確実に当接させることができ、L値のばらつきを抑えることができる。 (12) By making the width dimension W3 of the plate-shaped core 41 longer than the width dimension W1 of the flange portion 31, even if the contact position between the plate-shaped core 41 and the flange portion 31 deviates in the width direction, the collar portion 31 is flanged. It is possible to suppress the increase in size of the coil component 10 due to the portion 31 protruding outside the plate-shaped core 41. Further, the plate-shaped core 41 and the flange portion 31 can be reliably brought into contact with each other, and variations in the L value can be suppressed.

(13)一対の鍔部31及び板状コア41の両方に貯留部としてのスペースS1~S4が設けられるため、鍔部31及び板状コア41の両方のスペースS1~S4で接着剤を貯留することができる。 (13) Since the spaces S1 to S4 as storage portions are provided in both the pair of flange portions 31 and the plate-shaped core 41, the adhesive is stored in the spaces S1 to S4 of both the flange portions 31 and the plate-shaped core 41. be able to.

(14)鍔部31のスペースS1,S2の貯留領域を、板状コア41のスペースS3,S4の貯留領域よりも大きくすることで、鍔部31側に接着剤を多く流動できる。また、前述したように板状コア41の長さや幅を鍔部の長さや幅よりも長い構成とすることで鍔部31が相対的に内側に位置することとなるため、鍔部31側に多くの接着剤が流動されたとしても板状コア41の外形寸法よりも大型化することが抑えられる。 (14) By making the storage areas of the spaces S1 and S2 of the flange portion 31 larger than the storage regions of the spaces S3 and S4 of the plate-shaped core 41, a large amount of adhesive can flow to the flange portion 31 side. Further, as described above, by making the length and width of the plate-shaped core 41 longer than the length and width of the flange portion, the flange portion 31 is located relatively inward, so that the flange portion 31 is located on the side of the collar portion 31. Even if a large amount of adhesive is flown, it is possible to prevent the plate-shaped core 41 from becoming larger than the external dimensions.

(15)板状コア41の稜線部41a,41bを窪み形状としてコイル部品10の意図しない大型化を抑えられる。
(16)稜線部31h,31iの曲率半径を30μm以上とすることで漏れる接着剤を十分留めることができ、100μm以下とすることで鍔部31と板状コア41との接合強度を確保することができる。
(15) The ridges 41a and 41b of the plate-shaped core 41 are recessed to prevent the coil component 10 from being unintentionally enlarged.
(16) By setting the radius of curvature of the ridges 31h and 31i to 30 μm or more, the leaking adhesive can be sufficiently fastened, and by setting the radius of curvature to 100 μm or less, the joint strength between the flange portion 31 and the plate-shaped core 41 is ensured. Can be done.

(第2実施形態)
以下、図8~図10に従って第2実施形態について説明する。以下、第1実施形態との相違点を中心に説明する。
(Second Embodiment)
Hereinafter, the second embodiment will be described with reference to FIGS. 8 to 10. Hereinafter, the differences from the first embodiment will be mainly described.

図8及び図9に示すように、本実施形態のコイル部品10のドラムコア11は、スロープ35に溝部35aが設けられる点が異なる。
図8~図10に示すように、スロープ35に設けられる溝部35aは、断面半円形状であって、第1及び第2ワイヤ51,52の引き出し部51b,52bの一部を嵌入可能な形状を有する。これによって、引き出し部51b,52bのずれが抑えられ、引き出し部51b,52bを確実に案内することができるようになっている。溝部35aは第1及び第2ワイヤ51,52の直径に対して1/3以上の深さを有し、1/2以上の深さであることがより好ましい。なお、本例のスロープ35の傾斜角度は、巻芯部21の主面21aの幅方向Wdに対して、5~20度の範囲に設定され、図8及び図9では例えば約10度で示している。また、第1及び第2ワイヤ51,52は、それぞれ例えば直径約15~約80μmの範囲のものを用いることができ、本例では例えば約30μmの直径の被覆電線が用いられている。
As shown in FIGS. 8 and 9, the drum core 11 of the coil component 10 of the present embodiment is different in that the groove portion 35a is provided on the slope 35.
As shown in FIGS. 8 to 10, the groove portion 35a provided in the slope 35 has a semicircular cross section, and has a shape into which a part of the drawer portions 51b and 52b of the first and second wires 51 and 52 can be fitted. Have. As a result, the deviation of the drawer portions 51b and 52b is suppressed, and the drawer portions 51b and 52b can be reliably guided. The groove portion 35a has a depth of 1/3 or more with respect to the diameters of the first and second wires 51 and 52, and more preferably a depth of 1/2 or more. The inclination angle of the slope 35 in this example is set in the range of 5 to 20 degrees with respect to the width direction Wd of the main surface 21a of the winding core portion 21, and is shown at, for example, about 10 degrees in FIGS. 8 and 9. ing. Further, the first and second wires 51 and 52 can be used, for example, having a diameter in the range of about 15 to about 80 μm, respectively, and in this example, a covered wire having a diameter of, for example, about 30 μm is used.

次に、上記のコイル部品10の作用を説明する。
本実施形態のコイル部品10では、スロープ35に第1及び第2ワイヤ51,52の引き出し部51b,52bを沿わせるための溝部35aが形成されている。
Next, the operation of the coil component 10 will be described.
In the coil component 10 of the present embodiment, the slope 35 is formed with a groove portion 35a for aligning the lead-out portions 51b and 52b of the first and second wires 51 and 52.

以上記述したように、本実施形態によれば、第1実施形態の(1)~(16)の効果に加えて以下の効果を奏する。
(17)スロープ35に引き出し部51b,52bを嵌入する溝部35aが設けられることで、引き出し部51b,52bをより確実に案内して引き出し部51b,52bの撓みを抑え、ワイヤ51,52(引き出し部51b,52b)の断線を抑えることができる。
As described above, according to the present embodiment, the following effects are exhibited in addition to the effects of (1) to (16) of the first embodiment.
(17) By providing the slope 35 with a groove portion 35a for fitting the drawer portions 51b and 52b, the drawer portions 51b and 52b are guided more reliably and the bending of the drawer portions 51b and 52b is suppressed, and the wires 51 and 52 (drawers) 51 and 52 (drawers). It is possible to suppress the disconnection of the portions 51b and 52b).

(第3実施形態)
以下、図11及び図12に従って第3実施形態について説明する。以下、第1及び第2実施形態との相違点を中心に説明する。
(Third Embodiment)
Hereinafter, the third embodiment will be described with reference to FIGS. 11 and 12. Hereinafter, the differences from the first and second embodiments will be mainly described.

図11及び図12に示すように、本実施形態のコイル部品10のドラムコア11は、鍔部31の中央窪み部33に、実装面32a,32bと面一の壁部61が設けられる点が異なる。壁部61は、中央窪み部33において実装面32a,32b同士を接続するように設けられる。これにより、コイル部品10全体や基板全体を絶縁コートするべく樹脂等でモールドする際に中央窪み部33からの樹脂の流入を抑制することができる。ドラムコア11の実装面32a,32bから巻芯部21の主面21aまでの距離は、約0.1~約0.5mmに設定されている。 As shown in FIGS. 11 and 12, the drum core 11 of the coil component 10 of the present embodiment is different in that the mounting surfaces 32a and 32b and the flush wall portion 61 are provided in the central recessed portion 33 of the flange portion 31. .. The wall portion 61 is provided so as to connect the mounting surfaces 32a and 32b at the central recessed portion 33. As a result, it is possible to suppress the inflow of resin from the central recess 33 when molding the entire coil component 10 or the entire substrate with resin or the like for insulating coating. The distance from the mounting surfaces 32a and 32b of the drum core 11 to the main surface 21a of the winding core portion 21 is set to about 0.1 to about 0.5 mm.

上記のように構成されたドラムコア11のスロープ35の角度は、巻芯部21の主面21aの幅方向Wdに対して、5~20度の範囲に設定され、図11及び図12では例えば約5.5度を示している。 The angle of the slope 35 of the drum core 11 configured as described above is set in the range of 5 to 20 degrees with respect to the width direction Wd of the main surface 21a of the winding core portion 21, and in FIGS. 11 and 12, for example, about. It shows 5.5 degrees.

以上記述したように、本実施形態によれば、第1実施形態および第2実施形態の(1)~(17)の効果に加えて以下の効果を奏する。
(18)壁部61は、中央窪み部33において実装面32a,32b同士を接続するように設けられる。これにより、コイル部品10全体や基板全体を絶縁コートするべく樹脂等でモールドする際に中央窪み部33からの樹脂の流入を抑制することができる。そのため、ワイヤ51,52(引き出し部51b,52b)への影響を抑えて断線を抑制することができる。
As described above, according to the present embodiment, the following effects are obtained in addition to the effects of (1) to (17) of the first embodiment and the second embodiment.
(18) The wall portion 61 is provided so as to connect the mounting surfaces 32a and 32b at the central recessed portion 33. As a result, it is possible to suppress the inflow of resin from the central recess 33 when molding the entire coil component 10 or the entire substrate with resin or the like for insulating coating. Therefore, it is possible to suppress the influence on the wires 51 and 52 (drawing portions 51b and 52b) and suppress the disconnection.

なお、上記各実施形態は、以下の態様で実施してもよい。
・上記各実施形態では、一対の鍔部31の両方にスロープ35を有する構成としたが、一対の鍔部31の一方のみにスロープ35を設ける構成を採用してもよい。
In addition, each of the above-mentioned embodiments may be carried out in the following embodiments.
-In each of the above embodiments, the slope 35 is provided on both of the pair of flange portions 31, but a configuration in which the slope 35 is provided on only one of the pair of flange portions 31 may be adopted.

・上記各実施形態では、スロープ35は、巻芯部21側から鍔部31にかけて徐々に幅広形状となるように構成したが、これに限らない。例えば、巻芯部21側から鍔部31にかけて等幅となるような構成や、巻芯部21側から鍔部31にかけて幅狭形状となるような構成を採用してもよい。 -In each of the above embodiments, the slope 35 is configured to gradually become wider from the winding core portion 21 side to the flange portion 31, but is not limited to this. For example, a configuration having an equal width from the winding core portion 21 side to the flange portion 31 or a configuration having a narrow shape from the winding core portion 21 side to the flange portion 31 may be adopted.

・上記各実施形態では、スロープ35を直線形状の傾斜面としたが、湾曲形状となるような傾斜面としてもよい。
・上記第3実施形態では、中央窪み部33に壁部61を設けて実装面32a,32bと壁部61を面一となるように構成したが、これに限らない。例えば、図13に示すように、中央窪み部33が無い構成を採用してもよい。このような構成であっても(6)と同様の効果を奏する。
-In each of the above embodiments, the slope 35 is a linear inclined surface, but it may be an inclined surface having a curved shape.
In the third embodiment, the wall portion 61 is provided in the central recessed portion 33 so that the mounting surfaces 32a and 32b and the wall portion 61 are flush with each other, but the present invention is not limited to this. For example, as shown in FIG. 13, a configuration without the central recess 33 may be adopted. Even with such a configuration, the same effect as in (6) is obtained.

・上記各実施形態では、板状コア41の長さ寸法L4がドラムコア11の長さ寸法L1よりも長い構成としたが、これに限らない。例えば、板状コア41の長さ寸法L4とドラムコア11の長さ寸法L1とが同一の構成や、ドラムコア11の長さ寸法L1が板状コア41の長さ寸法L4よりも長い構成を採用してもよい。 In each of the above embodiments, the length dimension L4 of the plate-shaped core 41 is longer than the length dimension L1 of the drum core 11, but the present invention is not limited to this. For example, a configuration in which the length dimension L4 of the plate-shaped core 41 and the length dimension L1 of the drum core 11 are the same, or a configuration in which the length dimension L1 of the drum core 11 is longer than the length dimension L4 of the plate-shaped core 41 is adopted. You may.

・上記各実施形態では、板状コア41の幅寸法W3がドラムコア11の鍔部31の幅寸法W1よりも長くしたが、これに限らない。例えば、板状コアの幅寸法W3とドラムコア11の鍔部31の幅寸法W1とが同一の構成や、ドラムコア11の幅寸法W1が板状コア41の幅寸法W3よりも長い構成を採用してもよい。 In each of the above embodiments, the width dimension W3 of the plate-shaped core 41 is longer than the width dimension W1 of the flange portion 31 of the drum core 11, but the present invention is not limited to this. For example, a configuration in which the width dimension W3 of the plate-shaped core and the width dimension W1 of the flange portion 31 of the drum core 11 are the same, or a configuration in which the width dimension W1 of the drum core 11 is longer than the width dimension W3 of the plate-shaped core 41 is adopted. May be good.

・上記各実施形態では、電極を構成するAg層71上に、Cuめっき層72、Niめっき層73、Snめっき層74の順でめっき処理する構成としたが、さらに中間Cuめっき層を追加する構成を採用してもよい。 In each of the above embodiments, the Cu plating layer 72, the Ni plating layer 73, and the Sn plating layer 74 are plated in this order on the Ag layer 71 constituting the electrode, but an intermediate Cu plating layer is further added. The configuration may be adopted.

図14に示すように、Niめっき層73とSnめっき層74との間に中間Cuめっき層75を配置している。このような構成とすることで、ワイヤがより確実にCuと接触することとなるため、ワイヤが細くなることを抑えることができる。 As shown in FIG. 14, the intermediate Cu plating layer 75 is arranged between the Ni plating layer 73 and the Sn plating layer 74. With such a configuration, the wire comes into contact with Cu more reliably, so that it is possible to prevent the wire from becoming thin.

・上記実施形態では、板状コア41の稜線部41a,41bを窪み形状としたが、これに限らない。例えば稜線部41a,41bを曲面形状やC面形状としてもよい。
・上記実施形態並びに各変形例は適宜組み合わせてもよい。
-In the above embodiment, the ridges 41a and 41b of the plate-shaped core 41 have a recessed shape, but the present invention is not limited to this. For example, the ridge line portions 41a and 41b may have a curved surface shape or a C-plane shape.
-The above embodiment and each modification may be combined as appropriate.

10…コイル部品、11…ドラムコア(コア)、21…巻芯部、31…鍔部、31h,31i…稜線部、32a,32b…実装面、35…スロープ、35a…溝部、36a,36b…電極、41…板状コア、41a,41b…稜線部、51…第1ワイヤ(ワイヤ)、51a,51b…引き出し部、52…第2ワイヤ(ワイヤ)、52a,52b…引き出し部、72…Cuめっき層、73…Niめっき層、74…Snめっき層、75…中間Cuめっき層、Ar1,Ar2,Ar3,Ar4…貯留領域、S1,S2,S3,S4…スペース(貯留部)、SL1,SL2,SL3,SL4,SL5,SL6,SL7…延長面。
10 ... Coil parts, 11 ... Drum core (core), 21 ... Wind core part, 31 ... Plating part, 31h, 31i ... Ridge line part, 32a, 32b ... Mounting surface, 35 ... Slope, 35a ... Groove part, 36a, 36b ... Electrode , 41 ... Plate-shaped core, 41a, 41b ... Ridge line portion, 51 ... First wire (wire), 51a, 51b ... Drawer portion, 52 ... Second wire (wire), 52a, 52b ... Drawer portion, 72 ... Cu plating Layer, 73 ... Ni plating layer, 74 ... Sn plating layer, 75 ... Intermediate Cu plating layer, Ar1, Ar2, Ar3, Ar4 ... Storage area, S1, S2, S3, S4 ... Space (storage part), SL1, SL2, SL3, SL4, SL5, SL6, SL7 ... Extension surface.

Claims (7)

巻芯部と該巻芯部の両端に設けられた一対の鍔部を有するドラムコアと、前記一対の鍔部のそれぞれに設けられた電極と、前記巻芯部に巻回されるとともに引き出し部が前記電極と電気的に接続されたワイヤと、前記一対の鍔部に対して跨るように接着固定される板状の板状コアとを有し、
前記一対の鍔部及び前記板状コアの少なくとも一方は、自身の少なくとも1つの稜線部が該稜線部を挟む両面の延長面が交差する仮想稜線部よりも内側に位置して接着剤を貯留する貯留部を有し、
前記貯留部は、前記一対の鍔部及び前記板状コアの両方に設けられており、
前記鍔部の前記貯留部の貯留領域は前記板状コアの前記貯留部の貯留領域よりも大きいことを特徴とするコイル部品。
A drum core having a winding core portion and a pair of flange portions provided at both ends of the winding core portion, electrodes provided on each of the pair of flange portions, and a lead-out portion wound around the winding core portion. It has a wire electrically connected to the electrode and a plate-shaped plate-shaped core that is adhesively fixed so as to straddle the pair of flange portions.
At least one of the pair of collar portions and the plate-shaped core is located inside the virtual ridge line portion where at least one ridge line portion thereof intersects the extension surfaces of both sides sandwiching the ridge line portion to store the adhesive. Has a reservoir and
The storage portion is provided in both the pair of flange portions and the plate-shaped core.
A coil component characterized in that the storage area of the storage portion of the flange portion is larger than the storage region of the storage portion of the plate-shaped core .
前記板状コアにおける前記鍔部の並設方向に沿った長さは、前記一対の鍔部の端面間における長さよりも長いことを特徴とする請求項1に記載のコイル部品。 The coil component according to claim 1, wherein the length of the plate-shaped core along the parallel direction of the flange portions is longer than the length between the end faces of the pair of flange portions. 前記板状コアと前記鍔部との当接方向及び前記鍔部の並設方向と直交する方向に沿った前記板状コアの幅は、前記板状コアと前記鍔部との当接方向及び前記鍔部の並設方向と直交する方向に沿った前記鍔部の幅よりも長いことを特徴とする請求項1又は2に記載のコイル部品。 The width of the plate-shaped core along the contact direction between the plate-shaped core and the flange portion and the direction orthogonal to the parallel direction of the flange portions is the contact direction between the plate-shaped core and the flange portion and the width of the plate-shaped core. The coil component according to claim 1 or 2, wherein the collar portion is longer than the width of the flange portion along a direction orthogonal to the parallel direction of the flange portions. 前記板状コアの前記稜線部は、曲面形状であることを特徴とする請求項1~3のいずれか一項に記載のコイル部品。 The coil component according to any one of claims 1 to 3 , wherein the ridge line portion of the plate-shaped core has a curved surface shape. 前記板状コアの前記稜線部は、窪み形状であることを特徴とする請求項1~3のいずれか一項に記載のコイル部品。 The coil component according to any one of claims 1 to 3 , wherein the ridge line portion of the plate-shaped core has a recessed shape. 前記板状コアの前記稜線部は、C面形状であることを特徴とする請求項1~3のいずれか一項に記載のコイル部品。 The coil component according to any one of claims 1 to 3 , wherein the ridge line portion of the plate-shaped core has a C-plane shape. 前記一対の鍔部の稜線部は、その曲率半径が30μm以上100μm以下の範囲の曲面であることを特徴とする請求項1~5のいずれか一項に記載のコイル部品。 The coil component according to any one of claims 1 to 5 , wherein the ridge line portion of the pair of flange portions is a curved surface having a radius of curvature of 30 μm or more and 100 μm or less.
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