JP2008108944A - Magnetic element - Google Patents

Magnetic element Download PDF

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JP2008108944A
JP2008108944A JP2006290900A JP2006290900A JP2008108944A JP 2008108944 A JP2008108944 A JP 2008108944A JP 2006290900 A JP2006290900 A JP 2006290900A JP 2006290900 A JP2006290900 A JP 2006290900A JP 2008108944 A JP2008108944 A JP 2008108944A
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core
magnetic element
peripheral surface
end surface
ring core
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Yuichi Kamio
雄一 神尾
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Sumida Corp
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Sumida Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a magnetic element capable of stably obtaining the predetermined characteristic and relatively easily assembling. <P>SOLUTION: The magnetic element 1 comprises a first core 3 having a large stop part 3a and a samll stop part 3b, a winding part 7 formed between the first stop part 3a and the samll stop part 3b, a cylindrical second core 4 with an inner peripheral surface 4e faced to the outer circumferential surface of the samll stop part 3b and the winding part 7 and with one end part 4d faced to the large stop part 3a, and a spacer member 6 formed by a nonmagnetic material and arranged between the first core 3 and the second core 4. The spacer member 6 comprises a gap setting part 6a arranged between a surface 3d facing to the large stop part 3a and the one end surface 4d; and a guide part 6b integrally formed with the gap setting part 6a, arranged between the outer circumferential surface of the part of at least winding part 7 and the inner peripheral surface 4e of the second core 4, and for guiding the gap setting part 6a to the facing surface 3d or to the one end surface 4d. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、所定の電子部品等に使用される磁性素子に関する。   The present invention relates to a magnetic element used for a predetermined electronic component or the like.

従来から、電子機器や電子部品には、インダクタやトランス等に代表される磁性素子が使用されている。この種の磁性素子として、上端に形成された円板状の上鍔部および下端に形成された円板状の下鍔部を有する鍔付きで円柱状のドラムコアと、ドラムコアの外周側に配置される筒状のリングコアとを備えるインダクタが知られている(たとえば、特許文献1参照)。   Conventionally, magnetic elements typified by inductors and transformers have been used in electronic devices and electronic components. As this type of magnetic element, a cylindrical drum core with a flange having a disk-shaped upper collar portion formed at the upper end and a disk-shaped lower collar portion formed at the lower end, and disposed on the outer peripheral side of the drum core. An inductor having a cylindrical ring core is known (for example, see Patent Document 1).

この特許文献1に記載のインダクタでは、ドラムコアの下鍔部の上面とリングコアの下端面とが対向するように、ドラムコアおよびリングコアが配置されている。また、特許文献1に記載のインダクタでは、所定の特性を得るため、下鍔部の上面とリングコアの下端面との間には所定の隙間が形成されている。特許文献1には、この隙間を形成するための構成として、下鍔部の上面とリングコアの下端面との間にリング状のスペーサが配置された構成と、下鍔部の上面に当接する突起部がリングコアの下端面に形成された構成との2つの構成が開示されている。   In the inductor described in Patent Document 1, the drum core and the ring core are arranged so that the upper surface of the lower collar portion of the drum core and the lower end surface of the ring core face each other. Further, in the inductor described in Patent Document 1, a predetermined gap is formed between the upper surface of the lower collar portion and the lower end surface of the ring core in order to obtain predetermined characteristics. In Patent Document 1, as a configuration for forming this gap, a configuration in which a ring-shaped spacer is disposed between the upper surface of the lower collar portion and the lower end surface of the ring core, and a protrusion that contacts the upper surface of the lower collar portion Two configurations are disclosed, with the portion formed on the lower end surface of the ring core.

特開2002−313635号公報JP 2002-313635 A

特許文献1に記載のように、下鍔部の上面とリングコアの下端面との間にスペーサが配置される構成では、下鍔部の上面とリングコアの下端面との間に安定した隙間を形成できるため、インダクタが量産される場合であっても、所定のインダクタンス値や直流重畳特性を安定して得ることが可能になる。しかしながら、下鍔部の上面とリングコアの下端面との間にリング状のスペーサを配置する必要があるため、インダクタの組立作業が煩雑になる。特に、インダクタが小型化すると、スペーサも小型化、薄型化するため、その組立作業は一層、煩雑化する。   As described in Patent Document 1, in the configuration in which the spacer is disposed between the upper surface of the lower collar portion and the lower end surface of the ring core, a stable gap is formed between the upper surface of the lower collar portion and the lower end surface of the ring core. Therefore, even when the inductor is mass-produced, it is possible to stably obtain a predetermined inductance value and direct current superposition characteristics. However, since it is necessary to arrange a ring-shaped spacer between the upper surface of the lower collar and the lower end surface of the ring core, the assembly work of the inductor becomes complicated. In particular, when the inductor is downsized, the spacer is also downsized and thinned, so that the assembling work becomes more complicated.

一方、リングコアの下端面に突起部が形成される場合には、組立作業の簡素化を図ることは可能になる。しかしながら、この場合、下鍔部の上面に当接する突起部に磁束が集中する。そのため、突起部で、磁気飽和が生じやすくなり、所定のインダクタンス値や直流重畳特性を得ることは困難である。   On the other hand, when the protrusion is formed on the lower end surface of the ring core, the assembling work can be simplified. However, in this case, the magnetic flux concentrates on the protrusion that contacts the upper surface of the lower collar. For this reason, magnetic saturation is likely to occur at the protrusion, and it is difficult to obtain a predetermined inductance value and direct current superposition characteristics.

そこで、本発明の課題は、所定の特性を安定して得ることが可能でかつ比較的容易に組立を行うこと可能な磁性素子を提供することにある。   Therefore, an object of the present invention is to provide a magnetic element that can stably obtain predetermined characteristics and can be assembled relatively easily.

上記の課題を解決するため、本発明の磁性素子は、一端に形成される大鍔部および他端に形成され大鍔部よりも小さな小鍔部を有する第1コアと、大鍔部と小鍔部との間に導線が巻回されて形成される巻線部と、小鍔部および巻線部の外周面に内周面を対向させるとともに大鍔部に一端面を対向させる筒状の第2コアと、非磁性材料で形成され第1コアと第2コアとの間に配置されるスペーサ部材とを備え、スペーサ部材は、一端面に対向する大鍔部の対向面と一端面との間に配置され、対向面と一端面との間に所定の隙間を設定するための隙間設定部と、隙間設定部と一体で形成され、少なくとも巻線部の一部の外周面と第2コアの内周面との間に配置されるとともに、隙間設定部を対向面または一端面へ案内するためのガイド部とを備えることを特徴とする。   In order to solve the above problems, a magnetic element of the present invention includes a first core having a large collar portion formed at one end and a small collar portion formed at the other end and smaller than the large collar portion, a large collar portion and a small collar. A winding part formed by winding a conductive wire between the flange part, and a cylindrical part in which the inner peripheral surface is opposed to the outer peripheral surface of the small flange part and the winding part and one end surface is opposed to the large flange part A second core and a spacer member made of a nonmagnetic material and disposed between the first core and the second core, the spacer member including an opposing surface and one end surface of the large collar facing the one end surface; And a gap setting portion for setting a predetermined gap between the opposing surface and the one end surface, and a gap setting portion, and is formed integrally with at least a part of the outer peripheral surface of the winding portion and the second surface. A guide portion disposed between the inner peripheral surface of the core and for guiding the gap setting portion to the opposite surface or one end surface. It is characterized in.

本発明の磁性素子では、非磁性材料で形成され第1コアと第2コアとの間に配置されるスペーサ部材が、大鍔部の対向面と第2コアの一端面との間に配置される隙間設定部を備えている。そのため、大鍔部の対向面と第2コアの一端面との間の隙間を安定して設定することが可能となり、インダクタンス値や直流重畳特性等の所定の特性を安定して得ることが可能となる。   In the magnetic element of the present invention, a spacer member formed of a nonmagnetic material and disposed between the first core and the second core is disposed between the opposing surface of the large collar portion and one end surface of the second core. A gap setting unit is provided. Therefore, it is possible to stably set the gap between the facing surface of the large collar and the one end surface of the second core, and it is possible to stably obtain predetermined characteristics such as an inductance value and a DC superimposition characteristic. It becomes.

また、本発明では、スペーサ部材は、隙間設定部と一体で形成され、少なくとも巻線部の一部の外周面と第2コアの内周面との間に配置されるとともに、隙間設定部を対向面または一端面へ案内するためのガイド部を備えている。そのため、磁性素子の組立時には、隙間設定部を対向面または一端面へ容易に案内することができ、磁性素子の組立を比較的容易に行うことができる。   In the present invention, the spacer member is formed integrally with the gap setting portion, and is disposed between at least a part of the outer peripheral surface of the winding portion and the inner peripheral surface of the second core, and the gap setting portion is The guide part for guiding to an opposing surface or one end surface is provided. Therefore, when the magnetic element is assembled, the gap setting portion can be easily guided to the opposing surface or one end surface, and the magnetic element can be assembled relatively easily.

本発明において、ガイド部は、小鍔部の外周面の少なくとも一部と、第2コアの内周面との間にも配置されることが好ましい。このように構成すると、ガイド部を用いて、第2コアの内周面と小鍔部との間に適切な隙間を設定することが可能となり、インダクタンス値や直流重畳特性等の所定の特性をより安定して得ることが可能となる。また、隙間設定部と一体で形成されたガイド部を用いて、第2コアの内周面と小鍔部との間に適切な隙間を設定することが可能となるため、磁性素子の構成が簡素化される。さらに、ガイド部を用いて、第2コアの内周面と小鍔部との間に隙間を設定できるため、磁性素子の組立を容易に行うことができる。   In the present invention, it is preferable that the guide portion is also disposed between at least a part of the outer peripheral surface of the gavel portion and the inner peripheral surface of the second core. If comprised in this way, it will become possible to set an appropriate clearance gap between the inner peripheral surface of the 2nd core and a small collar part using a guide part, and predetermined characteristics, such as an inductance value and direct current superposition characteristics, will be set. It becomes possible to obtain more stably. In addition, since it is possible to set an appropriate gap between the inner peripheral surface of the second core and the gavel portion using the guide portion formed integrally with the gap setting portion, the configuration of the magnetic element is Simplified. Furthermore, since a gap can be set between the inner peripheral surface of the second core and the small collar portion using the guide portion, the magnetic element can be easily assembled.

本発明において、第2コアは、大鍔部の外周側にかつ一端面から大鍔部側に向かって突出するように形成される第1コアの固定部を備え、第1コアと第2コアとは、固定部と大鍔部との間に塗布される接着剤で固定され、隙間設定部は、固定部の形成範囲に対応する位置に形成される逃げ部を備えることが好ましい。このように構成すると、第1コアと第2コアとを接着する接着剤の影響で、隙間設定部によって設定される大鍔部の対向面と第2コアの一端面との隙間がばらつくのを抑制できる。すなわち、接着剤の影響を抑制して、大鍔部の対向面と第2コアの一端面との隙間を適切に設定することが可能になる。   In the present invention, the second core includes a first core fixing portion formed so as to protrude from the outer peripheral side of the large collar portion and from one end surface toward the large collar portion side, and the first core and the second core Is fixed with an adhesive applied between the fixing portion and the large collar portion, and the gap setting portion preferably includes a clearance portion formed at a position corresponding to the forming range of the fixing portion. With this configuration, the gap between the facing surface of the large collar set by the gap setting portion and the one end surface of the second core varies due to the influence of the adhesive that bonds the first core and the second core. Can be suppressed. That is, it is possible to appropriately set the gap between the facing surface of the large collar portion and the one end surface of the second core while suppressing the influence of the adhesive.

以上のように、本発明にかかる磁性素子では、所定の特性を安定して得ることが可能でかつ比較的容易に組立を行うことが可能になる。   As described above, the magnetic element according to the present invention can stably obtain predetermined characteristics and can be assembled relatively easily.

以下、本発明の実施の形態を図面に基づいて説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(磁性素子の構成)
図1は、本発明の実施の形態にかかる磁性素子1を示す平面図である。図2は、図1のE−E方向から磁性素子1を示す部分断面図である。図3は、図1に示す磁性素子1を示す底面図である。図4は、図1に示す磁性素子1の分解斜視図である。なお、図3では、図2のF−F方向から見た磁性素子1が図示されている。
(Configuration of magnetic element)
FIG. 1 is a plan view showing a magnetic element 1 according to an embodiment of the present invention. FIG. 2 is a partial cross-sectional view showing the magnetic element 1 from the EE direction of FIG. FIG. 3 is a bottom view showing the magnetic element 1 shown in FIG. FIG. 4 is an exploded perspective view of the magnetic element 1 shown in FIG. In FIG. 3, the magnetic element 1 viewed from the direction FF in FIG. 2 is illustrated.

本形態の磁性素子1は、たとえば、ノートパソコンの電源回路基板等の所定の回路基板上に実装される小型のインダクタである。この磁性素子1は、図1から図4に示すように、導線2と、導線2が巻回される第1コアとしてのドラムコア3と、ドラムコア3の外周側に配置される第2コアとしてのリングコア4と、導線2の両端部がそれぞれ接続される2個の端子5と、ドラムコア3とリングコア4との間に配置されるスペーサ部材6とを備えている。本形態の磁性素子1は、たとえば、図1の縦方向および横方向の寸法が約10mmで、図2の横方向の寸法(すなわち、厚さ)が約6.5mmの略直方体状に形成されている。なお、以下の説明では、図2の左側(図1の紙面手前側)を「上」、図2の右側(図1の紙面奥側)を「下」とする。また、図2の左右方向(すなわち、上下方向)に直交する方向を径方向とする。   The magnetic element 1 of the present embodiment is a small inductor mounted on a predetermined circuit board such as a power supply circuit board of a notebook personal computer. As shown in FIG. 1 to FIG. 4, the magnetic element 1 includes a conductor 2, a drum core 3 as a first core around which the conductor 2 is wound, and a second core disposed on the outer peripheral side of the drum core 3. A ring core 4, two terminals 5 to which both ends of the conducting wire 2 are connected, and a spacer member 6 disposed between the drum core 3 and the ring core 4 are provided. The magnetic element 1 of this embodiment is formed in a substantially rectangular parallelepiped shape, for example, having a vertical dimension and a horizontal dimension of FIG. 1 of about 10 mm and a horizontal dimension (ie, thickness) of FIG. 2 of about 6.5 mm. ing. In the following description, the left side (front side in FIG. 1) of FIG. 2 is “upper” and the right side (rear side of FIG. 1) of FIG. 2 is “lower”. Moreover, let the direction orthogonal to the left-right direction (namely, up-down direction) of FIG. 2 be a radial direction.

ドラムコア3は、たとえば、Mn−ZnやNi−Zn等のフェライトからなる磁性材料で形成されている。また、図4等に示すように、ドラムコア3は、両端部に鍔部を有する鍔付きの円柱状に形成されている。すなわち、ドラムコア3は、上端に形成された円板状の大鍔部3aと、下端に形成され大鍔部3aよりも径の小さな円板状の小鍔部3bとを備えている。   The drum core 3 is made of a magnetic material made of ferrite such as Mn—Zn or Ni—Zn, for example. Moreover, as shown in FIG. 4 etc., the drum core 3 is formed in the columnar shape with a hook which has a hook part in both ends. That is, the drum core 3 includes a disk-shaped large collar portion 3a formed at the upper end and a disk-shaped small collar portion 3b formed at the lower end and having a diameter smaller than that of the large collar portion 3a.

大鍔部3aには、導線2の端部を引き出すための引出部3cが形成されている。具体的には、図4に示すように、大鍔部3aの外周から径方向の中心部へ向かって窪むU形状の引出部3cが、上下方向で大鍔部3aを貫通するように、かつ、略180°ピッチで2箇所に形成されている。また、大鍔部3aの下面3d(図2参照)は、リングコア4の上端側に形成される後述の一端面4dに対向する対向面となっている。   In the large collar portion 3a, a lead-out portion 3c for pulling out the end portion of the conducting wire 2 is formed. Specifically, as shown in FIG. 4, the U-shaped lead portion 3 c that is recessed from the outer periphery of the large collar portion 3 a toward the central portion in the radial direction passes through the large collar portion 3 a in the vertical direction. And it is formed in two places with a substantially 180 degree pitch. Further, the lower surface 3d (see FIG. 2) of the large collar portion 3a is a facing surface facing an end surface 4d described later formed on the upper end side of the ring core 4.

導線2は、導電性線材の表面に絶縁被膜が被覆されて形成されている。導線2は、図2、図4に示すように、大鍔部3aと小鍔部3bとの間に円筒状に巻回されている。本形態では、大鍔部3aと小鍔部3bとの間に導線2が巻回されて巻線部7が形成されている。   The conducting wire 2 is formed by covering the surface of a conductive wire with an insulating coating. As shown in FIGS. 2 and 4, the conducting wire 2 is wound in a cylindrical shape between the large collar part 3 a and the small collar part 3 b. In this embodiment, the conductive wire 2 is wound between the large collar part 3a and the small collar part 3b to form the winding part 7.

リングコア4は、ドラムコア3と同様に、たとえば、Mn−ZnやNi−Zn等のフェライトからなる磁性材料で形成されている。また、リングコア4は、筒状に形成されている。具体的には、図4等に示すように、略直方体状の部材の外周側の角部の3箇所に面取部4aが形成され、残りの角部の1箇所にR形状部4bが形成されるように、かつ、上下方向に貫通する円形の中心孔4cが形成されることで、リングコア4は、筒状に形成されている。さらに、リングコア4の上端側には、径方向に直交する平面と略平行に形成された一端面4dが形成されている。   The ring core 4 is formed of a magnetic material made of ferrite such as Mn—Zn or Ni—Zn, for example, like the drum core 3. The ring core 4 is formed in a cylindrical shape. Specifically, as shown in FIG. 4 and the like, chamfered portions 4a are formed at three corners on the outer peripheral side of a substantially rectangular parallelepiped member, and an R-shaped portion 4b is formed at one of the remaining corners. Thus, the ring core 4 is formed in a cylindrical shape by forming the circular center hole 4c penetrating in the vertical direction. Furthermore, one end face 4d formed substantially parallel to a plane orthogonal to the radial direction is formed on the upper end side of the ring core 4.

図2に示すように、導線2が巻回されたドラムコア3とリングコア4とは、リングコア4の中心孔4cに巻線部7等が配置された状態で互いに固定されている。具体的には、導線2が巻回されたドラムコア3とリングコア4とは、リングコア4の一端面4dと大鍔部3aの下面3dとが上下方向で対向するように、かつ、巻線部7および小鍔部3bの外周面とリングコア4の内周面4eとが径方向で対向するように互いに固定されている。   As shown in FIG. 2, the drum core 3 and the ring core 4 around which the conducting wire 2 is wound are fixed to each other in a state where the winding portion 7 and the like are disposed in the center hole 4 c of the ring core 4. Specifically, the drum core 3 and the ring core 4 around which the conducting wire 2 is wound are such that the one end surface 4d of the ring core 4 and the lower surface 3d of the large collar portion 3a face each other in the vertical direction, and the winding portion 7 And the outer peripheral surface of the small collar part 3b and the inner peripheral surface 4e of the ring core 4 are mutually fixed so that it may oppose in radial direction.

リングコア4の側面には、端子5を取り付けるための端子取付部4fが形成されている。また、リングコア4の上端側には、ドラムコア3とリングコア4とを接着で固定するための固定部4gと、導線2の端部を引き出すための引出部4hとが形成されている。   A terminal attachment portion 4 f for attaching the terminal 5 is formed on the side surface of the ring core 4. Further, on the upper end side of the ring core 4, a fixing portion 4g for fixing the drum core 3 and the ring core 4 by bonding and a lead portion 4h for pulling out the end portion of the conducting wire 2 are formed.

端子取付部4fは、図4に示すように、平行な2つの側面のそれぞれに中心孔4cに向かって窪むように形成されている。端子取付部4fの上端側には、端子5に形成された後述の係合部5dに係合する係合凹部4jが一端面4dから下方向に窪むように形成され、端子取付部4fの下端には、端子5に形成された後述の端子部5cに係合する係合凹部4kが、リングコア4の下端面となる他端面4mから上方向に窪むように形成されている。   As shown in FIG. 4, the terminal attachment portion 4 f is formed in each of two parallel side surfaces so as to be recessed toward the center hole 4 c. On the upper end side of the terminal attachment portion 4f, an engagement recess 4j that engages with an engagement portion 5d described later formed on the terminal 5 is formed so as to be recessed downward from the one end surface 4d. Is formed so that an engagement recess 4k that engages with a terminal portion 5c, which will be described later, formed on the terminal 5 is recessed upward from the other end surface 4m that is the lower end surface of the ring core 4.

固定部4gは、R形状部4bが形成された角部およびR形状部4bの対角線上に位置する角部の2箇所に、一端面4dから上方向へ突出するように形成されている。この固定部4gは、図1、図2に示すように、大鍔部3aの外周側に配置されている。また、固定部4gの径方向の内側面は、大鍔部3aの外周に沿うように円弧状に形成されるとともに、上方向に向かうにしたがって径方向外側に傾斜する傾斜面4nとなっている。この傾斜面4nには、ドラムコア3とリングコア4とを固定するための接着剤が塗布される。すなわち、本形態の傾斜部4nは、ドラムコア3とリングコア4とを固定する際に塗布される接着剤の接着剤溜りとなっている。   The fixing portion 4g is formed to protrude upward from the one end surface 4d at two locations, that is, the corner portion where the R shape portion 4b is formed and the corner portion located on the diagonal line of the R shape portion 4b. This fixing | fixed part 4g is arrange | positioned at the outer peripheral side of the large collar part 3a, as shown in FIG. 1, FIG. Further, the radially inner side surface of the fixed portion 4g is formed in an arc shape along the outer periphery of the large collar portion 3a, and is an inclined surface 4n that is inclined radially outward as it goes upward. . An adhesive for fixing the drum core 3 and the ring core 4 is applied to the inclined surface 4n. That is, the inclined portion 4n of this embodiment is an adhesive reservoir for an adhesive applied when the drum core 3 and the ring core 4 are fixed.

引出部4hは、リングコア4の、固定部4gが形成されていない2箇所の角部のそれぞれに、一端面4dから下方向へ窪むように形成されている。   The lead-out part 4h is formed in each of the two corners of the ring core 4 where the fixing part 4g is not formed so as to be recessed downward from the one end face 4d.

端子5は、導電性を有する金属の薄板で形成されている。この端子5は、図4に示すように、端子取付部4fに配置される基部5aと、導線2の端部が固定される導線固定部5bと、磁性素子1が実装される回路基板と磁性素子1とを電気的に接続するための端子部5cと、端子5をリングコア4の取り付けるための係合部5dとを備えている。   The terminal 5 is formed of a thin metal plate having conductivity. As shown in FIG. 4, the terminal 5 includes a base portion 5a disposed in the terminal mounting portion 4f, a conductor fixing portion 5b to which the end of the conductor 2 is fixed, a circuit board on which the magnetic element 1 is mounted, and a magnetic circuit. A terminal portion 5c for electrically connecting the element 1 and an engaging portion 5d for attaching the terminal 5 to the ring core 4 are provided.

導線固定部5bは、図1等に示すように、引出部4hが形成されたリングコア4の角部に形成される面取部4aに当接するように配置されている。この導線固定部5bの径方向外側の面には、導線2の端部が半田付けされて固定される。すなわち、図1等に示すように、導線固定部5bの径方向外側には、導線2の端部を固定するための半田部8が形成されている。また、導線2の端部は、スペーサ部材6に形成された後述の引出部6c、大鍔部3aの引出部3cおよびリングコア4の引出部4hを経由して、導線固定部5bまで引き出されて固定される。   As shown in FIG. 1 and the like, the conducting wire fixing portion 5b is disposed so as to contact a chamfered portion 4a formed at a corner portion of the ring core 4 in which the lead portion 4h is formed. The end of the conductor 2 is soldered and fixed to the radially outer surface of the conductor fixing portion 5b. That is, as shown in FIG. 1 etc., the solder part 8 for fixing the edge part of the conducting wire 2 is formed in the radial direction outer side of the conducting wire fixing | fixed part 5b. Further, the end portion of the conducting wire 2 is drawn out to the conducting wire fixing portion 5b via a later-described drawing portion 6c formed in the spacer member 6, a drawing portion 3c of the large collar portion 3a, and a drawing portion 4h of the ring core 4. Fixed.

端子部5cは、略矩形状に形成され、リングコア4の下端側に形成された係合凹部4kと係合している。すなわち、端子部5cは、磁性素子1の下面に配置されている。また、係合部5dは、リングコア4の上端側に形成された係合凹部4jと係合している。   The terminal portion 5 c is formed in a substantially rectangular shape, and is engaged with an engagement recess 4 k formed on the lower end side of the ring core 4. That is, the terminal portion 5 c is disposed on the lower surface of the magnetic element 1. Further, the engaging portion 5 d is engaged with an engaging concave portion 4 j formed on the upper end side of the ring core 4.

スペーサ部材6は、非磁性材料で形成されている。本形態のスペーサ部材6は、非磁性かつ非導電性の樹脂材料を用いた樹脂成型によって形成されている。また、スペーサ部材6は、図4等に示すように、鍔付きで厚さの薄い略円筒状に形成されている。このスペーサ部材6の厚さは非常に薄く、後述の隙間設定部6aおよびガイド部6bの厚さは、たとえば、約0.3mmとなっている。さらに、スペーサ部材6の外径は、リングコア4の内径とほぼ等しく、スペーサ部材6の内径は、小鍔部3bの外径とほぼ等しくなっている。   The spacer member 6 is made of a nonmagnetic material. The spacer member 6 of this embodiment is formed by resin molding using a nonmagnetic and nonconductive resin material. Further, as shown in FIG. 4 and the like, the spacer member 6 is formed in a substantially cylindrical shape with a flange and a small thickness. The spacer member 6 is very thin, and a gap setting portion 6a and a guide portion 6b described later have a thickness of, for example, about 0.3 mm. Furthermore, the outer diameter of the spacer member 6 is substantially equal to the inner diameter of the ring core 4, and the inner diameter of the spacer member 6 is substantially equal to the outer diameter of the small flange portion 3b.

図2等に示すように、本形態のスペーサ部材6は、大鍔部3aの下面3dと一端面4dとの間に所定の隙間を設定するため、上端に薄い鍔状に形成された隙間設定部6aと、磁性素子1の組立時に、隙間設定部6aを一端面4dへ適切に案内するため、略円筒状に形成されたガイド部6bとを備えている。また、スペーサ部材6には、導線2の端部を引き出すための引出部6cが形成されている。   As shown in FIG. 2 and the like, the spacer member 6 according to the present embodiment sets a predetermined gap between the lower surface 3d and the one end surface 4d of the large collar portion 3a, so that the gap setting is formed in a thin collar shape at the upper end. In order to properly guide the gap setting portion 6a to the one end surface 4d when the magnetic element 1 is assembled, a guide portion 6b formed in a substantially cylindrical shape is provided. Further, the spacer member 6 is formed with a lead portion 6 c for pulling out the end portion of the conducting wire 2.

隙間設定部6aは、図2、図4に示すように、大鍔部3aの下面3dおよび一端面4dに当接する4個の当接部6dと、当接部6c間に形成された2個の逃げ部6eとを備えている。当接部6dは、ガイド部6bの上端から径方向外側に突出する略円弧状に形成されている。また、4個の当接部6dは、略同一に厚さで、かつ、略90°ピッチで形成されている。   As shown in FIGS. 2 and 4, the gap setting portion 6a includes two contact portions 6d that are in contact with the lower surface 3d and one end surface 4d of the large collar portion 3a and two contact portions 6c. And a relief portion 6e. The contact portion 6d is formed in a substantially arc shape that protrudes radially outward from the upper end of the guide portion 6b. Further, the four abutting portions 6d have substantially the same thickness and are formed at a pitch of about 90 °.

逃げ部6eには、ガイド部6bの上端から径方向外側に突出する鍔状部分が存在しない。すなわち、逃げ部6eは、スペーサ部材6の上端の鍔状部分を円周方向の所定範囲で切り欠くようにして形成されている。また、2個の逃げ部6eは、略180°ピッチで配置されている。具体的には、2個の逃げ部6eはそれぞれ、リングコア4に形成された固定部4gの形成範囲に対応する位置に形成されている。すなわち、磁性素子1が組み立てられた状態では、2個の逃げ部6eの外周側にはそれぞれ、固定部4gが配置されている。   The escape portion 6e does not have a hook-like portion that protrudes radially outward from the upper end of the guide portion 6b. That is, the escape portion 6e is formed so as to cut out the flange-like portion at the upper end of the spacer member 6 within a predetermined range in the circumferential direction. Further, the two escape portions 6e are arranged at a substantially 180 ° pitch. Specifically, each of the two relief portions 6e is formed at a position corresponding to the formation range of the fixing portion 4g formed on the ring core 4. That is, in a state where the magnetic element 1 is assembled, the fixing portions 4g are arranged on the outer peripheral sides of the two escape portions 6e.

引出部6cは、隙間設定部6aから下方向へ窪むように形成されている。具体的には、当接部6dの間であって2個の逃げ部6eが形成されていない部分に、略180°ピッチで形成されている。   The lead portion 6c is formed so as to be recessed downward from the gap setting portion 6a. Specifically, it is formed at a pitch of approximately 180 ° in a portion between the contact portions 6d where the two escape portions 6e are not formed.

図2に示すように、隙間設定部6aは、大鍔部3aの下面3dと一端面4dとに当接した状態で(より具体的には、当接部6dが大鍔部3aの下面3dと一端面4dとに当接した状態で)、大鍔部3aと一端面4dとの間に配置されている。そのため、大鍔部3aの下面3dと一端面4dとの間の隙間は均一に確保されている。   As shown in FIG. 2, the gap setting portion 6a is in contact with the lower surface 3d of the large collar portion 3a and the one end surface 4d (more specifically, the contact portion 6d is the lower surface 3d of the large collar portion 3a. And in contact with the one end surface 4d), it is disposed between the large collar portion 3a and the one end surface 4d. Therefore, the clearance gap between the lower surface 3d of the large collar part 3a and the one end surface 4d is ensured uniformly.

また、ガイド部6bは、巻線部7および小鍔部3bの外周面とリングコア4の内周面4eとに当接した状態で、巻線部7および小鍔部3bとリングコア4の内周面4eとの間に配置されている。そのため、巻線部7および小鍔部3bの外周面とリングコア4の内周面4eとの間の隙間は、全周略均一に確保されている。なお、本形態では、小鍔部3bの下端側の一部の外周面とリングコア4の内周面4eとの間には、ガイド部6bが配置されていないが、小鍔部3bの外周面とリングコア4の内周面4eとの間の全域にガイド部6bが配置されても良い。   The guide portion 6b is in contact with the outer peripheral surface of the winding portion 7 and the small flange portion 3b and the inner peripheral surface 4e of the ring core 4, and the inner periphery of the winding portion 7, the small flange portion 3b, and the ring core 4. It arrange | positions between the surfaces 4e. Therefore, the clearances between the outer peripheral surfaces of the winding portion 7 and the small flange portion 3b and the inner peripheral surface 4e of the ring core 4 are ensured substantially uniformly over the entire circumference. In this embodiment, the guide portion 6b is not disposed between a part of the outer peripheral surface on the lower end side of the small flange portion 3b and the inner peripheral surface 4e of the ring core 4, but the outer peripheral surface of the small flange portion 3b. The guide portion 6b may be disposed in the entire region between the ring core 4 and the inner peripheral surface 4e of the ring core 4.

(磁性素子の組立手順)
以上のように構成された磁性素子1は、以下の手順で組み立てられる。
(Assembly procedure of magnetic element)
The magnetic element 1 configured as described above is assembled in the following procedure.

まず、ドラムコア3に導線2を巻回する。具体的には、大鍔部3aと小鍔部3bとの間に導線2を巻回して、引出部3cから導線2の端部を引き出す。また、リングコア4に端子5を取り付ける。具体的には、端子部5cを係合凹部4kに係合させ、係合部5dを係合凹部4jに係合させる。   First, the conducting wire 2 is wound around the drum core 3. Specifically, the conducting wire 2 is wound between the large collar portion 3a and the small collar portion 3b, and the end portion of the conducting wire 2 is pulled out from the lead-out portion 3c. A terminal 5 is attached to the ring core 4. Specifically, the terminal portion 5c is engaged with the engagement recess 4k, and the engagement portion 5d is engaged with the engagement recess 4j.

その後、端子5が取り付けられたリングコア4にスペーサ部材6を取り付ける。具体的には、リングコア4の引出部4hの位置とスペーサ部材6の引出部6cの位置とを合わせ、かつ、固定部4gの位置と逃げ部6eの位置とを合わせた状態で、隙間設定部6a(具体的には、当接部6d)が一端面4dに当接するまで、リングコア4の中心孔4cにガイド部6bを挿入する。この際、ガイド部6bがリングコア4の内周面4eに沿って挿入されることで、隙間設定部6aは、容易にかつ適切に一端面4dまで案内される。   Thereafter, the spacer member 6 is attached to the ring core 4 to which the terminal 5 is attached. Specifically, in the state where the position of the drawing portion 4h of the ring core 4 and the position of the drawing portion 6c of the spacer member 6 are matched, and the position of the fixing portion 4g and the position of the escape portion 6e are matched, The guide portion 6b is inserted into the center hole 4c of the ring core 4 until 6a (specifically, the contact portion 6d) contacts the one end surface 4d. At this time, since the guide portion 6b is inserted along the inner peripheral surface 4e of the ring core 4, the gap setting portion 6a is easily and appropriately guided to the one end surface 4d.

その後、リングコア4に取り付けられたスペーサ部材6の内周側に、導線2が巻回されたドラムコア3を挿入する。具体的には、ドラムコア3の引出部3cの位置とリングコア4の引出部4hの位置を合わせた状態で、隙間設定部6aに大鍔部3aの下面3dが当接するまで、スペーサ部材6の内周側にドラムコア3を挿入する。その後、固定部4gの傾斜面4nに接着剤を塗布して、ドラムコア3とリングコア4とを固定する。また、導線2の端部を導線固定部5bに固定する。   Thereafter, the drum core 3 around which the conducting wire 2 is wound is inserted into the inner peripheral side of the spacer member 6 attached to the ring core 4. Specifically, in the state in which the position of the drawing portion 3c of the drum core 3 and the position of the drawing portion 4h of the ring core 4 are matched, the inner surface of the spacer member 6 is kept until the lower surface 3d of the large collar portion 3a contacts the gap setting portion 6a. The drum core 3 is inserted on the circumferential side. Thereafter, an adhesive is applied to the inclined surface 4n of the fixing portion 4g to fix the drum core 3 and the ring core 4. Moreover, the edge part of the conducting wire 2 is fixed to the conducting wire fixing | fixed part 5b.

なお、導線2が巻回されたドラムコア3にスペーサ部材6を取り付けて、その状態で、リングコア4の内周面4eにドラムコア3およびスペーサ部材6を挿入して、ドラムコア3とリングコア4とを固定しても良い。導線2が巻回されたドラムコア3にスペーサ部材6を取り付けるときには、ドラムコア3の引出部3cの位置とスペーサ部材6の引出部6cの位置とを合わせた状態で、隙間設定部6aが大鍔部3aの下面3dに当接するまで、スペーサ部材6の内周側に、導線2が巻回されたドラムコア3を挿入する。この際、小鍔部3bおよび巻線部7がガイド部6bの内周面に沿って挿入されることで、隙間設定部6aは、容易にかつ適切に大鍔部3aの下面3dまで案内される。   In addition, the spacer member 6 is attached to the drum core 3 around which the conducting wire 2 is wound, and in this state, the drum core 3 and the spacer member 6 are inserted into the inner peripheral surface 4e of the ring core 4, and the drum core 3 and the ring core 4 are fixed. You may do it. When the spacer member 6 is attached to the drum core 3 around which the conducting wire 2 is wound, the gap setting portion 6a is a large collar portion in a state where the position of the drawing portion 3c of the drum core 3 and the position of the drawing portion 6c of the spacer member 6 are matched. The drum core 3 around which the conducting wire 2 is wound is inserted into the inner peripheral side of the spacer member 6 until it contacts the lower surface 3d of 3a. At this time, the gap setting portion 6a is easily and appropriately guided to the lower surface 3d of the large collar portion 3a by inserting the small collar portion 3b and the winding portion 7 along the inner peripheral surface of the guide portion 6b. The

(本形態の主な効果)
以上説明したように、本形態の磁性素子1では、非磁性材料で形成されたスペーサ部材6の隙間設定部6aが、大鍔部3aの下面3dとリングコア4の一端面4dとの間に配置されている。そのため、大鍔部3aの下面3dと一端面4dとの間の隙間を安定して設定できる。その結果、磁性素子1のインダクタンス値や直流重畳特性等の所定の特性を安定して得ることが可能となる。
(Main effects of this form)
As described above, in the magnetic element 1 of the present embodiment, the gap setting portion 6a of the spacer member 6 formed of a nonmagnetic material is disposed between the lower surface 3d of the large collar portion 3a and the one end surface 4d of the ring core 4. Has been. Therefore, the clearance gap between the lower surface 3d of the large collar part 3a and the one end surface 4d can be set stably. As a result, it is possible to stably obtain predetermined characteristics such as the inductance value and direct current superposition characteristics of the magnetic element 1.

また、本形態では、スペーサ部材6には、隙間設定部6aを一端面4dへ案内するためのガイド部6bが隙間設定部6aと一体で形成されている。そのため、磁性素子1の組立時には、隙間設定部6aを一端面4dへ容易に案内することができる。すなわち、隙間設定部6aを一端面4dへ容易に取り付けることができる。したがって、磁性素子1の組立を比較的容易に行うことができる。ここで、本形態のように、隙間設定部6a(具体的には、当接部4d)が非常に薄く形成される場合には、ガイド部6bがないと、隙間設定部6aは取り扱いにくくなり、一端面4dへの隙間設定部6aの取付作業も煩雑になるが、本形態では、上述のように、隙間設定部6aの取付作業が容易になる。   Further, in this embodiment, the spacer member 6 is integrally formed with the gap setting portion 6a as a guide portion 6b for guiding the gap setting portion 6a to the one end surface 4d. Therefore, when the magnetic element 1 is assembled, the gap setting portion 6a can be easily guided to the one end face 4d. That is, the gap setting part 6a can be easily attached to the one end face 4d. Therefore, the magnetic element 1 can be assembled relatively easily. Here, when the gap setting portion 6a (specifically, the contact portion 4d) is formed very thin as in the present embodiment, the gap setting portion 6a is difficult to handle without the guide portion 6b. The mounting operation of the gap setting portion 6a to the one end surface 4d becomes complicated, but in this embodiment, the mounting operation of the clearance setting portion 6a is facilitated as described above.

特に、本形態では、ガイド部6bは、小鍔部3bの外周面とリングコア4の内周面4eとの間にも配置されている。そのため、ガイド部6bを用いて、リングコア4の内周面4eと小鍔部3bとの間に適切な隙間を設定できる。その結果、磁性素子1のインダクタンス値や直流重畳特性等の所定の特性をより安定して得ることができる。また、隙間設定部6aと一体で形成されたガイド部6bを用いて、リングコア4の内周面4eと小鍔部3bとの間に適切な隙間を設定できるため、磁性素子1の構成が簡素化される。さらに、ガイド部6bを用いて、大鍔部3aの下面3dと一端面4dとの間の隙間、および、リングコア4の内周面4eと小鍔部3bとの間に隙間を同時に設定できるため、磁性素子1の組立を容易に行うことができる。   In particular, in this embodiment, the guide portion 6b is also disposed between the outer peripheral surface of the small flange portion 3b and the inner peripheral surface 4e of the ring core 4. Therefore, an appropriate gap can be set between the inner peripheral surface 4e of the ring core 4 and the small collar portion 3b using the guide portion 6b. As a result, predetermined characteristics such as the inductance value and DC superposition characteristics of the magnetic element 1 can be obtained more stably. In addition, since a suitable gap can be set between the inner peripheral surface 4e of the ring core 4 and the gutter part 3b by using the guide part 6b formed integrally with the gap setting part 6a, the configuration of the magnetic element 1 is simple. It becomes. Furthermore, since the guide portion 6b can be used to simultaneously set a gap between the lower surface 3d of the large collar portion 3a and the one end surface 4d and a gap between the inner peripheral surface 4e of the ring core 4 and the small collar portion 3b. The magnetic element 1 can be easily assembled.

本形態では、スペーサ部材6には、リングコア4の固定部4gの形成範囲に対応する位置に逃げ部6cが形成されている。そのため、ドラムコア3とリングコア4とが、固定部4gと大鍔部3aとの間に塗布される接着剤で固定される場合であっても、接着剤の影響で、当接部6dによって設定される大鍔部3aの下面3dと一端面4dとの隙間がばらつくのを抑制することが可能になる。すなわち、接着剤の影響を抑制して、大鍔部3aの下面3dと一端面4dとの隙間を適切に設定することが可能になる。また、本形態では、逃げ部6eが形成される場合であっても、4個の当接部6dは、ガイド部6bによって一体となっているため、当接部6dの取扱いが煩雑となるのを防止できる。   In this embodiment, the spacer member 6 is formed with a relief portion 6 c at a position corresponding to the formation range of the fixing portion 4 g of the ring core 4. Therefore, even when the drum core 3 and the ring core 4 are fixed with an adhesive applied between the fixing portion 4g and the large collar portion 3a, the contact portion 6d is set by the influence of the adhesive. It is possible to prevent the gap between the lower surface 3d of the large collar 3a and the one end surface 4d from varying. That is, it is possible to appropriately set the gap between the lower surface 3d of the large collar 3a and the one end surface 4d while suppressing the influence of the adhesive. Further, in this embodiment, even when the escape portion 6e is formed, the four contact portions 6d are integrated by the guide portion 6b, so that handling of the contact portion 6d becomes complicated. Can be prevented.

(他の実施の形態)
上述した形態では、図3に示すように、端子部5cは、リングコア4の側面から径方向内側に向かって伸びるように配置されている。この他にもたとえば、端子部5cは、R形状部4bが形成されたリングコア4の角部、あるいは、面取部4aが形成されたリングコア4の角部から径方向内側に向かって伸びるように配置されても良い。また、端子5を設けずに、リングコア4に直接、端子部を形成しても良い。この場合には、リングコア4の他端面4mの一部(たとえば、角部)にメッキを被覆して端子部を形成し、この端子部に導線2の端部を半田付けして接続すれば良い。また、この場合には、スペーサ部材6の下端に導線2の引出部を形成し、スペーサ部材6の下端側から導線2を引き出せば良い。
(Other embodiments)
In the embodiment described above, as shown in FIG. 3, the terminal portion 5 c is disposed so as to extend from the side surface of the ring core 4 toward the radially inner side. In addition, for example, the terminal portion 5c extends radially inward from the corner of the ring core 4 where the R-shaped portion 4b is formed or the corner of the ring core 4 where the chamfered portion 4a is formed. It may be arranged. Further, the terminal portion may be formed directly on the ring core 4 without providing the terminal 5. In this case, a terminal part may be formed by coating a part (for example, a corner part) of the other end face 4m of the ring core 4 to form a terminal part, and the end part of the conducting wire 2 may be soldered and connected to this terminal part. . In this case, a lead-out portion of the conducting wire 2 may be formed at the lower end of the spacer member 6 and the conducting wire 2 may be drawn out from the lower end side of the spacer member 6.

上述した形態では、ガイド部6bは、小鍔部3bとリングコア4の内周面4eとの間にも配置されている。この他にもたとえば、小鍔部3bとリングコア4の内周面4eとの間にはガイド部6bが配置されず、巻線部7とリングコア4の内周面4eとの間にのみガイド部6bが配置されても良い。この場合には、小鍔部3bとリングコア4の内周面4eとの間には、別体のスペーサ部材が取り付けられても良い。   In the embodiment described above, the guide portion 6 b is also disposed between the small collar portion 3 b and the inner peripheral surface 4 e of the ring core 4. In addition, for example, the guide portion 6 b is not disposed between the small flange portion 3 b and the inner peripheral surface 4 e of the ring core 4, and the guide portion is provided only between the winding portion 7 and the inner peripheral surface 4 e of the ring core 4. 6b may be arranged. In this case, a separate spacer member may be attached between the small flange portion 3 b and the inner peripheral surface 4 e of the ring core 4.

上述した形態では、ガイド部6bは、円筒状に形成されているが、ガイド部6bの形状は円筒状に限定されず、ガイド部6bの円周方向の一部が切り欠かれていても良い。また、ドラムコア3とリングコア4とが、固定部4gと大鍔部3aとの間に塗布される接着剤によって固定されず、別方法によって固定される場合には、スペーサ部材6に逃げ部6eが形成されなくても良い。   In the embodiment described above, the guide portion 6b is formed in a cylindrical shape, but the shape of the guide portion 6b is not limited to a cylindrical shape, and a part of the guide portion 6b in the circumferential direction may be cut out. . When the drum core 3 and the ring core 4 are not fixed by the adhesive applied between the fixing portion 4g and the large collar portion 3a but are fixed by another method, the escape portion 6e is provided in the spacer member 6. It does not have to be formed.

本発明の実施の形態にかかる磁性素子を示す平面図である。It is a top view which shows the magnetic element concerning embodiment of this invention. 図1のE−E方向から磁性素子を示す部分断面図である。It is a fragmentary sectional view which shows a magnetic element from the EE direction of FIG. 図1に示す磁性素子を示す底面図である。It is a bottom view which shows the magnetic element shown in FIG. 図1に示す磁性素子の分解斜視図である。It is a disassembled perspective view of the magnetic element shown in FIG.

符号の説明Explanation of symbols

1 磁性素子
2 導線
3 ドラムコア(第1コア)
3a 大鍔部
3b 小鍔部
3d 下面(対向面)
4 リングコア(第2コア)
4d 一端面
4e 内周面
4g 固定部
6 スペーサ部材
6a 隙間設定部
6b ガイド部
6e 逃げ部
7 巻線部
DESCRIPTION OF SYMBOLS 1 Magnetic element 2 Conductor 3 Drum core (1st core)
3a Large collar part 3b Small collar part 3d Lower surface (opposite surface)
4 Ring core (second core)
4d One end face 4e Inner peripheral surface 4g Fixed part 6 Spacer member 6a Gap setting part 6b Guide part 6e Escape part 7 Winding part

Claims (3)

一端に形成される大鍔部および他端に形成され上記大鍔部よりも小さな小鍔部を有する第1コアと、上記大鍔部と上記小鍔部との間に導線が巻回されて形成される巻線部と、上記小鍔部および上記巻線部の外周面に内周面を対向させるとともに上記大鍔部に一端面を対向させる筒状の第2コアと、非磁性材料で形成され上記第1コアと上記第2コアとの間に配置されるスペーサ部材とを備え、
上記スペーサ部材は、上記一端面に対向する上記大鍔部の対向面と上記一端面との間に配置され、上記対向面と上記一端面との間に所定の隙間を設定するための隙間設定部と、上記隙間設定部と一体で形成され、少なくとも上記巻線部の一部の外周面と上記第2コアの内周面との間に配置されるとともに、上記隙間設定部を上記対向面または上記一端面へ案内するためのガイド部とを備えることを特徴とする磁性素子。
A conductive wire is wound between the first core having a large collar part formed at one end and a small core part formed at the other end and having a small collar part smaller than the large collar part, and the large collar part and the small collar part. A winding portion to be formed, a cylindrical second core having an inner peripheral surface facing the outer peripheral surface of the small flange portion and the winding portion, and an end surface facing the large flange portion, and a nonmagnetic material A spacer member formed and disposed between the first core and the second core,
The spacer member is disposed between a facing surface of the large collar portion facing the one end surface and the one end surface, and a gap setting for setting a predetermined gap between the facing surface and the one end surface And the gap setting portion, and is disposed between at least a part of the outer peripheral surface of the winding portion and the inner peripheral surface of the second core, and the gap setting portion is disposed on the facing surface. A magnetic element comprising a guide portion for guiding to the one end surface.
前記ガイド部は、前記小鍔部の外周面の少なくとも一部と、前記第2コアの内周面との間にも配置されることを特徴とする請求項1記載の磁性素子。   The magnetic element according to claim 1, wherein the guide portion is also disposed between at least a part of an outer peripheral surface of the small collar portion and an inner peripheral surface of the second core. 前記第2コアは、前記大鍔部の外周側にかつ前記一端面から前記大鍔部側に向かって突出するように形成される前記第1コアの固定部を備え、
前記第1コアと前記第2コアとは、上記固定部と前記大鍔部との間に塗布される接着剤で固定され、
前記隙間設定部は、上記固定部の形成範囲に対応する位置に形成される逃げ部を備えることを特徴とする請求項1または2記載の磁性素子。
The second core includes a fixing portion of the first core that is formed on the outer peripheral side of the large collar portion and protrudes from the one end surface toward the large collar portion side,
The first core and the second core are fixed with an adhesive applied between the fixing portion and the large collar portion,
The magnetic element according to claim 1, wherein the gap setting portion includes a relief portion formed at a position corresponding to a formation range of the fixing portion.
JP2006290900A 2006-10-26 2006-10-26 Magnetic element Pending JP2008108944A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2455952A1 (en) 2010-11-17 2012-05-23 Sumida Corporation Magnetic element
JP2017188679A (en) * 2016-03-31 2017-10-12 太陽誘電株式会社 Coil component

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2455952A1 (en) 2010-11-17 2012-05-23 Sumida Corporation Magnetic element
US8736412B2 (en) 2010-11-17 2014-05-27 Sumida Corporation Magnetic element
JP2017188679A (en) * 2016-03-31 2017-10-12 太陽誘電株式会社 Coil component

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