JPH0449608A - High frequency coil having iron core and manufacture thereof - Google Patents
High frequency coil having iron core and manufacture thereofInfo
- Publication number
- JPH0449608A JPH0449608A JP15856090A JP15856090A JPH0449608A JP H0449608 A JPH0449608 A JP H0449608A JP 15856090 A JP15856090 A JP 15856090A JP 15856090 A JP15856090 A JP 15856090A JP H0449608 A JPH0449608 A JP H0449608A
- Authority
- JP
- Japan
- Prior art keywords
- case
- coil
- fine powder
- synthetic resin
- annular
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims description 6
- 239000000843 powder Substances 0.000 claims abstract description 33
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 13
- 239000000057 synthetic resin Substances 0.000 claims abstract description 13
- 239000007788 liquid Substances 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 abstract description 27
- 229910000859 α-Fe Inorganic materials 0.000 abstract description 26
- 238000004804 winding Methods 0.000 abstract description 3
- 230000002093 peripheral effect Effects 0.000 abstract description 2
- 238000010276 construction Methods 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 9
- 230000035699 permeability Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000001965 increasing effect Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、電気機器に外部より混入したり、電気機器よ
り発生する高周波ノイズを除去するチョークコイルや、
リアリトル等として使用される有鉄心コイルと、その簡
易な製造方法に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a choke coil that removes high-frequency noise that enters into electrical equipment from the outside or is generated from electrical equipment;
This article relates to iron-core coils used as realitors, etc., and a simple manufacturing method thereof.
第７図と第８図は、従来の高周波用チョークコイルを示
すもので、第７図に示すチョークコイル（０１）は、残
留磁気の極めて少ない高導磁性のフェライトのような微
粉末を焼結した円柱状のフェライトビーズ（０２）にお
ける軸線と平行をなす複数の通孔（０３）に、導線（ｏ
４）を縫うように挿通したものである。Figures 7 and 8 show conventional high-frequency choke coils.The choke coil (01) shown in Figure 7 is made by sintering fine powder such as ferrite with high magnetic conductivity and extremely low residual magnetism. Conductive wires (o
4) is threaded through it.
第８図に示すチョークコイル（ｏ５）は、フェライト微
粉末を焼結したトロイダルコア（０６）に、導線（０７
）を巻回したものである。The choke coil (o5) shown in FIG.
) is wound.
第７図に示すチョークコイル（０１）は、導線（０４）
を各通孔（０３）に、順次手作業で挿通させる必要があ
り、甚だ作業性が悪い。The choke coil (01) shown in FIG.
must be manually inserted into each through hole (03) one after another, resulting in extremely poor workability.
第８図に示すチョークコイル（０５）は、トロイダルコ
ア（０６）が無端の環状であるため、導線（０７）を巻
くために、大型の特殊な巻線機を必要とし、作業が面倒
で生産性が悪い。The choke coil (05) shown in Fig. 8 has an endless ring-shaped toroidal core (06), so it requires a large special winding machine to wind the conductor (07), making the work cumbersome and difficult to manufacture. Bad sex.
そして、両チョークコイル（０１） （０５）ともに、
大電流回路に使用する場合、当然導線（０４） （０７
）が太くなるので、さらに巻き難くなる。And both choke coils (01) (05),
When used in a large current circuit, naturally conductors (04) (07
) becomes thicker, making it even more difficult to wrap.
この問題に対処して、図示を省略したが、フェライト等
の微粉末磁性材を、熱可塑性合成樹脂をバインダとして
棒状に成形したプラスチックコアに、導線を巻装した後
、プラスチックコアを環状に屈曲して、両端面同士を密
接させ、インサート成形等により、周囲を磁性材含有の
熱可塑性合成樹脂をもって被覆したチョークコイルもあ
る。To deal with this problem, although not shown in the drawings, a conductive wire is wound around a plastic core made by molding finely powdered magnetic material such as ferrite into a rod shape using thermoplastic synthetic resin as a binder, and then the plastic core is bent into an annular shape. There is also a choke coil in which both end faces are brought into close contact with each other and the periphery is coated with a thermoplastic synthetic resin containing a magnetic material by insert molding or the like.
しかし、このチョークコイルのコアは、焼結したコアと
異なり、フェライト等の微粉末同士が。However, unlike a sintered core, the core of this choke coil is made of fine powder such as ferrite.
バインダとなる合成樹脂を挾んで、僅かではあるが前向
しており、焼結したものに比して、同一体積中のフェラ
イトの含有量が少いため、導磁率が低下して、性能が若
干劣る。The synthetic resin that serves as the binder is sandwiched between them, and the ferrite is slightly tilted forward, and compared to sintered products, the ferrite content in the same volume is lower, so the magnetic permeability is lower and the performance is slightly lower. Inferior.
本発明は、合成樹脂製の環状ケース内に、単巻コイルを
湾曲させて、両端をケース外に突出させて封入し、ケー
ス内の空間に、高導磁性微粉末を密に充填したことを特
徴とする高周波用有鉄心コイル。The present invention is characterized in that a single-turn coil is curved and enclosed in a synthetic resin annular case with both ends protruding outside the case, and the space inside the case is densely filled with highly magnetically conductive fine powder. Features a high-frequency iron core coil.
また軸線方向の一端面が開口する合成樹脂製の環状ケー
ス内に、単巻コイルを湾曲させて、両端をケース外に突
出させて挿入し、ケース内の空間に高導磁性微粉末を満
たし、ケースとコイルと高導磁性微粉末に対して不活性
で、低粘度、かつ揮発性の液体を、高導磁性微粉末に滴
下し、ついで乾燥させて高密度とした後、ケースの開口
面を、合成樹脂製カバーをもって閉塞することを特徴と
する高周波用有鉄心コイルの製造方法により上述のｍｇ
の解決を図ったものである。In addition, a single-turn coil is inserted into a synthetic resin annular case with one end open in the axial direction with both ends protruding outside the case, and the space inside the case is filled with highly magnetically conductive fine powder. A low-viscosity, volatile liquid that is inert to the case, coil, and high magnetic conductivity fine powder is dropped onto the high magnetic conductivity fine powder, and then dried to make it dense, and then the opening surface of the case is The above-mentioned mg
This is an attempt to solve the problem.
ケース（１）内に満たしたフェライト微粉末（５）（高
導磁性微粉末）に、低粘度揮発性のメチルアルコール（
６）（液体）を滴下すると、乾燥時は嵩張っていたフェ
ライト微粉末（５）における個々の粒子が、メチルアル
コール（６）の濡れによる重量増加と潤滑作用により、
若干滑動して、粒子間の空間を埋め、全体の見掛けの体
積が縮小し、さらに隣接する粒子間に介在するメチルア
ルコール（６）の蒸発により、その公吏に体積が縮小し
て、高密度となる。Low viscosity volatile methyl alcohol (
6) When (liquid) is dropped, the individual particles in the ferrite fine powder (5), which were bulky when dry, increase in weight due to the wetting of the methyl alcohol (6) and the lubricating action.
Slight sliding fills the spaces between particles, reducing the overall apparent volume, and further evaporation of methyl alcohol (6) interposed between adjacent particles causes the official to shrink in volume and become denser. Become.
ケース（１）内に満たしたフェライト微粉（５）を、機
械的に圧縮しても、高密度となって導磁率が上昇し、チ
ョークコイル（９）の性能が向上する。Even if the fine ferrite powder (5) filled in the case (1) is mechanically compressed, it becomes denser, the magnetic permeability increases, and the performance of the choke coil (9) improves.
このようにして得られたコアは、機械的強度は低いが、
ケース（１）とカバー（８）により補強される。The core obtained in this way has low mechanical strength, but
It is reinforced by the case (1) and cover (8).
しかも、作業は容易で生産性も向上する。Moreover, the work is easier and productivity is improved.
第１図〜第５図は、本発明の第１実施例を示すもので、
（１）は、縦断面形がＵ字形をなし、かつ、軸線方向の
一端面（第２図〜第５図上面）が開口する環状の合成樹
脂性のケースで、その外周板（ｌａ）には、上端より、
互いに近接する１対の切込溝（２）（２）が切設されて
いる。1 to 5 show a first embodiment of the present invention,
(1) is an annular synthetic resin case with a U-shaped vertical cross section and an opening at one end surface in the axial direction (top surface in FIGS. 2 to 5). is from the top,
A pair of cut grooves (2) (2) close to each other are cut.
このケース（１）の環状溝（３）内に、単巻コイル（４
）のコイル部（４ａ）を湾曲させてはめ込み、両端部（
４ｂ） （４ｂ）を、切込溝（２）（２）より外方に突
出させる。In the annular groove (3) of this case (1), a single-turn coil (4
), curve the coil part (4a) and fit it into the both ends (
4b) (4b) is made to protrude outward from the cut groove (2) (2).
ついで、第３図に示すように、環状溝（３）内にフェラ
イト微粉末（５）を満たすと、フェライト微粉末（５）
の各粒子は、微視的に不規則に角張っているので、フェ
ライト微粉末（５）の各粒子間には、多くの空間が生じ
ていて嵩張っている。Next, as shown in FIG. 3, when the annular groove (3) is filled with fine ferrite powder (5), the fine ferrite powder (5)
Since each particle of the ferrite powder (5) is microscopically irregular and angular, there are many spaces between each particle of the ferrite fine powder (5), making it bulky.
第４図に示すように、このフェライト微粉末（５）に、
ケース（１）とコイル（４）とフェライト微粉末（５）
に対して不活性な低粘度揮発性の液体、例えばメチルア
ルコール（６）を平均に滴下する。As shown in Figure 4, this fine ferrite powder (5) has
Case (1), coil (4) and fine ferrite powder (5)
A low viscosity volatile liquid inert to the liquid, for example methyl alcohol (6), is added dropwise.
すると、フェライト微粉末微粉末（５）は、浸透して各
粒子に付着したメチルアルコール（６）の重量増加作用
と潤滑作用により、各粒子は、若干滑動して、粒子間の
空間を埋め、見掛けの全体の体積が減少する。粒子間に
介在するメチルアルコール（６）を自然乾燥または加熱
乾燥により蒸発させると、その分だけ、さらに見掛けの
体積が減少して、密度が増大する。Then, due to the weight increasing effect and lubricating effect of the methyl alcohol (6) that has permeated and adhered to each particle, each particle of the ferrite fine powder (5) slides slightly and fills the space between the particles. The overall apparent volume decreases. When the methyl alcohol (6) interposed between the particles is evaporated by natural drying or heat drying, the apparent volume further decreases and the density increases.
この時、フェライト微粉末（５）の体積の縮小により、
上方に生じた空間（７）と、フェライト微粉末（５）の
層内に生じた若干の亀裂（図示時）を埋めるため、フェ
ライト微粉末（５）を若干補充する。At this time, due to the reduction in the volume of the ferrite fine powder (5),
A small amount of fine ferrite powder (5) is replenished to fill the space (7) generated above and some cracks (as shown) generated in the layer of fine ferrite powder (5).
ついで、第５図に示すように、ケース（１）とほぼ同形
状のカバー（８）を施して、両者を適宜接着すれば、外
力に対して機械的に補強された、本発明の高周波用の有
鉄心コイル（９）が得られる。Next, as shown in FIG. 5, a cover (8) having almost the same shape as the case (1) is applied and the two are properly glued together to form a high-frequency device of the present invention which is mechanically reinforced against external forces. The iron core coil (9) is obtained.
第６図は、本発明の第２実施例を示すもので、前実施例
と同様の部材には同一符号を付して、その説明を省略す
る。FIG. 6 shows a second embodiment of the present invention, in which members similar to those in the previous embodiment are designated by the same reference numerals, and their explanations will be omitted.
同図の（１）は、上記ケース（１）と同材質の同形等寸
もしくは軸線方向の長さが若干短寸のケースである。(1) in the figure is a case made of the same material as the case (1), the same shape and the same size, or slightly shorter in length in the axial direction.
このケース（１）に、前実施例と同様に、単巻コイル（
４）をはめ込ん、プレスの台板（１１）上に載置し、軸
線方向の長さがケース（１）より長寸で、外径がケース
（１）の外径より大径、上部の内径がケース（１）の内
径と等径、下方の内径がケース（１）の外径と等径で、
下端より１対の切込溝（１２） （１２）を切設した鋼
製の外筒（１３）を外嵌するとともに、軸線方向の長さ
が外筒（１３）と等長、内径がケース（１）の内径より
小径、上部の外径がケース（１）の内径と等径、下部の
外径がケース（１）の外径と等径の鋼製の内筒（１４）
を内嵌する。In this case (1), a single-turn coil (
4) and place it on the base plate (11) of the press, the length in the axial direction is longer than the case (1), the outer diameter is larger than the outer diameter of the case (1), and the inner diameter of the upper part is the same diameter as the inner diameter of the case (1), and the lower inner diameter is the same diameter as the outer diameter of the case (1),
A steel outer cylinder (13) with a pair of cut grooves (12) (12) cut from the lower end is fitted onto the outside, and the length in the axial direction is equal to that of the outer cylinder (13), and the inner diameter is the same as that of the case. A steel inner cylinder (14) with a diameter smaller than the inner diameter of (1), an outer diameter of the upper part equal to the inner diameter of the case (1), and an outer diameter of the lower part equal to the outer diameter of the case (1).
Insert.
このようにして形成された外嵌（１３）と内筒（１４）
間の空間（１５）と、ケース（１）の環状環（３）に、
所定量のフェライト微粉末（５）を、はぼ平均に投入す
る。The outer fitting (13) and inner cylinder (14) formed in this way
In the space (15) between and the annular ring (3) of case (1),
A predetermined amount of fine ferrite powder (5) is added evenly.
ついで、上方より、空間（１５）に弛みなく嵌入しうる
環状突起（１６）を下端に有する押型（１７）を下降さ
せ、フェライト微粉末（５）を圧縮して固化させる。Then, a press die (17) having an annular protrusion (16) at its lower end that can fit into the space (15) without slack is lowered from above to compress and solidify the fine ferrite powder (5).
しかる後、ケース（１）を外筒（１３）と内筒（１４）
より取り外して、前実施例同様カバー（８）を施せば、
第５図に示すような、本発明の高周波用の有鉄心コイル
（９）が得られる。After that, attach the case (1) to the outer cylinder (13) and inner cylinder (14).
If you remove it and apply the cover (8) as in the previous example,
A high-frequency iron core coil (9) of the present invention as shown in FIG. 5 is obtained.
本発明の方法によって製造された有鉄心コイル（９）は
、コアを形成するフェライト微粉末（５）が高密度とな
って、導磁率が高いため、性能が良好である。The iron-core coil (9) manufactured by the method of the present invention has good performance because the fine ferrite powder (5) forming the core has a high density and high magnetic permeability.
しかも、全体がケース（１）とカバー（８）により覆わ
れているので、機械的に強固であるとともに、コアや単
巻コイル（４）が傷つくことがない。Moreover, since the entire structure is covered by the case (1) and the cover (8), it is mechanically strong and the core and single-turn coil (4) are not damaged.
また製造に特殊な機器を必要とせず、しかも、製造が簡
単容易であり、生産性がよい。Moreover, no special equipment is required for manufacturing, and furthermore, manufacturing is simple and easy, and productivity is high.
第１図は、ケースに単巻コイルをはめ込んだ状態を示す
平面図、
第２図は、第１図の■−■線における断面図、第３図は
、ケースにフェライト微粉末を満たした状態を示す中央
縦断正面図、
第４図は、液体（メチルアルコール）滴下時の状態を示
す中央縦断正面図、
第、５図は、本発明の高周波用の有鉄心コーイルの中央
縦断正面図、
第６図は、フェライト微粉末圧縮開始前の状態を示す中
央縦断正面図、
第７図は、従来の高周波用チョークコイルの一例を示す
斜視図、
第８図は、同じく他の例を示す平面図である。
（１）ケース
（２）切込溝
（４）単巻コイル
（４ｂ）端部
（６）メチルアルコール
（８）カバー
（１１）台板
（１３）外筒
（１５）空間
（１７）押型
（１ａ）外周板
（３）環状溝
（４ａ）コイル部
（５）フェライト微粉末
（７）空間
（９）有鉄心コイル
（１２）切込溝
（１４）内筒
（１６）環状突起
寸
寸Figure 1 is a plan view showing the single-turn coil fitted into the case, Figure 2 is a sectional view taken along the line ■-■ in Figure 1, and Figure 3 is the case filled with fine ferrite powder. FIG. 4 is a center longitudinal sectional front view showing the state when liquid (methyl alcohol) is dripped; FIGS. Fig. 6 is a central longitudinal sectional front view showing the state before the start of compression of fine ferrite powder, Fig. 7 is a perspective view showing an example of a conventional high frequency choke coil, and Fig. 8 is a plan view showing another example. It is. (1) Case (2) Cut groove (4) Single-turn coil (4b) End (6) Methyl alcohol (8) Cover (11) Base plate (13) Outer cylinder (15) Space (17) Press mold (1a) ) Outer peripheral plate (3) Annular groove (4a) Coil part (5) Fine ferrite powder (7) Space (9) Iron core coil (12) Cut groove (14) Inner cylinder (16) Annular protrusion dimensions
Claims (3)
させて、両端をケース外に突出させて封入し、ケース内
の空間に、高導磁性微粉末を密に充填したことを特徴と
する高周波用有鉄心コイル。(1) A single-turn coil is curved and enclosed in a synthetic resin annular case with both ends protruding outside the case, and the space inside the case is densely filled with highly magnetically conductive fine powder. Iron core coil for high frequency.
ース内に、単巻コイルを湾曲させて、両端をケース外に
突出させて挿入し、ケース内の空間に高導磁性微粉末を
満たし、ケースとコイルと高導磁性微粉末に対して不活
性で、低粘度、かつ揮発性の液体を、高導磁性微粉末に
滴下し、ついで乾燥させて高密度とした後、ケースの開
口面を、合成樹脂製カバーをもって閉塞することを特徴
とする高周波用有鉄心コイルの製造方法。(2) A single-turn coil is inserted into a synthetic resin annular case with one end open in the axial direction, with both ends protruding outside the case, and highly magnetically conductive fine powder is filled into the space inside the case. A low viscosity, volatile liquid that is inert to the case, coil, and high magnetic conductivity fine powder is dropped onto the high magnetic conductivity fine powder, and then dried to make it dense, and then the case is opened. A method for manufacturing a high-frequency iron-core coil, characterized in that the surface of the coil is closed with a synthetic resin cover.
ース内に、単巻コイルを湾曲させて、両端をケース外に
突出させて挿入し、ケース内の空間に高導磁性微粉末を
満たして、機械的に圧縮した後、ケースの開口面を合成
樹脂製カバーをもって閉塞することを特徴とする高周波
用有鉄心コイルの製造方法。(3) A single-turn coil is inserted into a synthetic resin annular case with one end open in the axial direction with both ends protruding outside the case, and highly magnetically conductive fine powder is filled into the space inside the case. A method for manufacturing a high-frequency iron-core coil, which comprises filling the case and mechanically compressing it, and then closing the opening of the case with a synthetic resin cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15856090A JPH0449608A (en) | 1990-06-19 | 1990-06-19 | High frequency coil having iron core and manufacture thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15856090A JPH0449608A (en) | 1990-06-19 | 1990-06-19 | High frequency coil having iron core and manufacture thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0449608A true JPH0449608A (en) | 1992-02-19 |
Family
ID=15674375
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15856090A Pending JPH0449608A (en) | 1990-06-19 | 1990-06-19 | High frequency coil having iron core and manufacture thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0449608A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07292673A (en) * | 1994-04-25 | 1995-11-07 | Kyokado Eng Co Ltd | Reinforced soil structure |
| JP2010225841A (en) * | 2009-03-24 | 2010-10-07 | Denso Corp | Reactor |
| US20130114319A1 (en) * | 2010-07-13 | 2013-05-09 | Sumitomo Electric Industries, Ltd. | Reactor |
| JP2014229731A (en) * | 2013-05-22 | 2014-12-08 | Ｎｅｃトーキン株式会社 | Reactor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5571007A (en) * | 1978-11-22 | 1980-05-28 | Daido Steel Co Ltd | Coil |
| JPS57128014A (en) * | 1981-01-31 | 1982-08-09 | Sumida Denki Kk | Manufacture of coil |
| JPS6053450A (en) * | 1983-08-04 | 1985-03-27 | ゼネラル モ−タ−ズ コ−ポレ−シヨン | Automobile, exchange shock absorber cartridge mounting method of automobile and repair method of shock absorber cartridge of automobile |
-
1990
- 1990-06-19 JP JP15856090A patent/JPH0449608A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5571007A (en) * | 1978-11-22 | 1980-05-28 | Daido Steel Co Ltd | Coil |
| JPS57128014A (en) * | 1981-01-31 | 1982-08-09 | Sumida Denki Kk | Manufacture of coil |
| JPS6053450A (en) * | 1983-08-04 | 1985-03-27 | ゼネラル モ−タ−ズ コ−ポレ−シヨン | Automobile, exchange shock absorber cartridge mounting method of automobile and repair method of shock absorber cartridge of automobile |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07292673A (en) * | 1994-04-25 | 1995-11-07 | Kyokado Eng Co Ltd | Reinforced soil structure |
| JP2010225841A (en) * | 2009-03-24 | 2010-10-07 | Denso Corp | Reactor |
| US20130114319A1 (en) * | 2010-07-13 | 2013-05-09 | Sumitomo Electric Industries, Ltd. | Reactor |
| US8754739B2 (en) * | 2010-07-13 | 2014-06-17 | Sumitomo Electric Industries, Ltd. | Reactor |
| JP2014229731A (en) * | 2013-05-22 | 2014-12-08 | Ｎｅｃトーキン株式会社 | Reactor |
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