JPH06168818A - Iron core - Google Patents
Iron coreInfo
- Publication number
- JPH06168818A JPH06168818A JP499693A JP499693A JPH06168818A JP H06168818 A JPH06168818 A JP H06168818A JP 499693 A JP499693 A JP 499693A JP 499693 A JP499693 A JP 499693A JP H06168818 A JPH06168818 A JP H06168818A
- Authority
- JP
- Japan
- Prior art keywords
- iron core
- coil
- core
- polyimide resin
- relay
- 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.)
- Granted
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 39
- 229920001721 polyimide Polymers 0.000 claims abstract description 23
- 239000009719 polyimide resin Substances 0.000 claims abstract description 23
- 238000007740 vapor deposition Methods 0.000 claims abstract description 10
- 239000010409 thin film Substances 0.000 claims abstract description 7
- 238000001771 vacuum deposition Methods 0.000 claims description 7
- 239000010408 film Substances 0.000 abstract description 11
- 238000000576 coating method Methods 0.000 abstract description 3
- 239000011248 coating agent Substances 0.000 abstract description 2
- 238000009413 insulation Methods 0.000 abstract description 2
- 238000010292 electrical insulation Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- GLUUGHFHXGJENI-UHFFFAOYSA-N Piperazine Chemical compound C1CNCCN1 GLUUGHFHXGJENI-UHFFFAOYSA-N 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Electromagnets (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、プリント基板上に実装
される超小形のリレー等に使用されるコイルを巻回した
鉄心に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an iron core wound with a coil used for a micro relay or the like mounted on a printed circuit board.
【０００２】[0002]
【従来の技術】従来この種の鉄心は、電磁石装置を構成
する一部品として使用されており、その外周にはコイル
巻線が巻回されるとともに、該鉄心の一部（磁極面）
と、必要に応じヨークを介して鉄心に磁気的に結合され
たアマチュアの一部（磁極面）が、前記コイルの起磁力
で接離するようにして電磁石装置を構成している。2. Description of the Related Art Conventionally, an iron core of this kind has been used as a component of an electromagnet device, and a coil winding is wound around the outer periphery of the iron core, and a part of the iron core (pole surface).
Then, a part of the armature (magnetic pole surface) magnetically coupled to the iron core via the yoke, if necessary, comes into contact with and separates by the magnetomotive force of the coil, thereby forming the electromagnet device.
【０００３】[0003]
【発明が解決しようとする課題】プリント基板上に実装
される電子部品の小形化が進み、表面実装タイプの部品
が数多く用いられるようになっている。それら電子部品
に伴い、同じプリント基板上で使用される電磁石装置を
含んだリレー等も超小形化することが望まれてきてい
る。With the progress of miniaturization of electronic parts mounted on a printed circuit board, many surface mount type parts have been used. Along with these electronic components, it has been desired to miniaturize a relay or the like including an electromagnet device used on the same printed circuit board.
【０００４】また従来鉄心の外周にコイルを巻回すると
きには、電磁石としてのコイルと鉄心間の電気的絶縁性
を確保することが必要であり、一般的に両者間の絶縁を
図るため合成樹脂等の成形材よりなるコイル枠を鉄心に
設けることが必要であり、そのため電磁石が大形化して
しまうという問題があった。Further, when a coil is wound around the outer periphery of a conventional iron core, it is necessary to secure electrical insulation between the coil as an electromagnet and the iron core. Generally, a synthetic resin or the like is used to insulate the two from each other. It is necessary to provide the iron core with a coil frame made of the above molding material, which causes a problem that the electromagnet becomes large in size.
【０００５】またさらに該鉄心をリレーに組み込む場合
には、リレーとしての安定した復帰特性を確保するため
に鉄心またはヨーク並びにアマチュアの何れかに別部品
である非磁性体としてのレシジュアルプレートを設ける
必要があり、部品点数が増大し製作が煩雑になるととも
に電磁石、すなわちリレー外形がさらに大形化するとい
う問題があった。Further, when the iron core is incorporated in a relay, in order to secure a stable return characteristic as the relay, a separate plate as a non-magnetic material is provided on either the iron core, the yoke or the armature. However, there is a problem that the number of parts is increased, the manufacturing is complicated, and the electromagnet, that is, the outer shape of the relay is further enlarged.
【０００６】本発明は前記問題点に着目し、その改善を
図り小形化でかつ部品点数の少ない電磁石（またはリレ
ー）を構成するための鉄心を提供することを目的とす
る。It is an object of the present invention to provide an iron core for constructing an electromagnet (or a relay) which is small in size and has a small number of parts in order to improve the problem.
【０００７】[0007]
【課題を解決するための手段】請求項１の鉄心は、プリ
ント基板上に実装されるリレーに組み込まれ、外周にコ
イルを巻回しており、該鉄心の表面に蒸着によりポリイ
ミド樹脂の薄膜を被覆している。The iron core according to claim 1 is incorporated in a relay mounted on a printed circuit board, and a coil is wound around the outer periphery, and the surface of the iron core is coated with a thin film of a polyimide resin by vapor deposition. is doing.
【０００８】請求項２の鉄心は、真空蒸着により蒸着す
るポリイミド樹脂の膜厚を３〜５ミクロンとしている。In the iron core of claim 2, the film thickness of the polyimide resin deposited by vacuum deposition is 3 to 5 μm.
【０００９】[0009]
【作用】請求項１の鉄心は、プリント基板上に実装され
るリレーに組み込まれ、外周にコイルを巻回しており、
該鉄心の表面に蒸着によりポリイミド樹脂の薄膜を被覆
していることにより、鉄心部分が小形でありながらコイ
ル占積率を高めることができるため超小形の電磁石を構
成することができる。The iron core according to claim 1 is incorporated in a relay mounted on a printed circuit board and has a coil wound around the outer periphery thereof.
By covering the surface of the iron core with a thin film of a polyimide resin by vapor deposition, the coil space factor can be increased while the iron core portion is small, so that an ultra-small electromagnet can be constructed.
【００１０】請求項２の鉄心は、真空蒸着により３〜５
ミクロンのポリイミド樹脂を被覆しているので、コイル
と鉄心間の十分な電気的絶縁性を保ったうえでコイルを
巻回する鉄心部分の大きさを極力小さくすることができ
るとともに鉄心の磁極面においても均一なポリイミド樹
脂の膜厚が確保できるため、リレーとして用いた場合高
精度のレシジュアルギャップを管理できる。The iron core of claim 2 is 3-5 by vacuum deposition.
Since it is coated with micron polyimide resin, the size of the core around which the coil is wound can be made as small as possible while maintaining sufficient electrical insulation between the coil and the core. Since a uniform polyimide resin film thickness can be secured, a highly accurate residual gap can be managed when used as a relay.
【００１１】[0011]
【実施例】以下にこれを詳しく説明する。EXAMPLES This will be described in detail below.
【００１２】この発明において、鉄心とは、コイルを巻
回したヨークも含むものである。次に示す方法条件によ
り、磁気回路部品である鉄心、ヨーク、アマチュアの外
部表面にポリイミド樹脂の極薄膜を被覆するものであ
り、その樹脂コーティングの方法は、真空蒸着法の蒸着
方法による。In the present invention, the iron core also includes a yoke around which a coil is wound. The outer surface of the iron core, the yoke, and the armature, which are magnetic circuit components, is coated with an extremely thin film of polyimide resin under the following method conditions. The resin coating method is a vacuum deposition method.
【００１３】その条件は、樹脂を蒸発源とする通常の蒸
着条件でよい。したがって、減圧は、たとえば、１０-2
〜１０-6Torr程度である。ポリイミド樹脂としては、分
子骨格中にイミド結合を有するものであれば、種類は問
わない。縮合タイプでも付加タイプでもよい。変則的な
ポリイミド樹脂すなわちピペラジン系ポリイミド樹脂等
をも含む。膜厚は、たとえば４±１ミクロン程度である
が、鉄心とコイル間の電気的な絶縁が十分確保できるも
のであればこれに限定される訳ではない。The conditions may be ordinary vapor deposition conditions using a resin as an evaporation source. Therefore, the reduced pressure is, for example, 10 -2.
It is about 10 −6 Torr. The polyimide resin may be of any type as long as it has an imide bond in the molecular skeleton. It may be a condensation type or an addition type. It also includes irregular polyimide resins, that is, piperazine-based polyimide resins. The film thickness is, for example, about 4 ± 1 μm, but is not limited to this as long as sufficient electrical insulation between the iron core and the coil can be ensured.
【００１４】前記ポリイミド樹脂蒸着膜は、磁気回路部
品の角部でも膜厚の均一性にすぐれ、熱変形温度３００
°Ｃ以上であって連続使用温度２００〜２５０°Ｃでも
何ら劣化が起きず、極めて耐熱性に富み、しかも、体積
抵抗率は５０°Ｃで５〜７×１０16Ω・ｃｍ、１００℃
で１×１０18Ω・ｃｍ、１５０℃で２×１０16Ω・ｃｍ
であって、電気絶縁性にも富み、かつ、耐摩耗性にも優
れる。The polyimide resin vapor deposition film has excellent film thickness uniformity even at the corners of magnetic circuit parts, and has a heat distortion temperature of 300.
It has a temperature resistance of 50 ° C or above and does not deteriorate even at a continuous use temperature of 200 to 250 ° C, and has extremely high heat resistance, and has a volume resistivity of 5 to 7 × 10 16 Ωcm at 100 ° C and 100 ° C
At 1 × 10 18 Ω · cm and at 150 ° C 2 × 10 16 Ω · cm
In addition, it has excellent electric insulation and excellent wear resistance.
【００１５】以上の如く本発明による鉄心は、ポリイミ
ド樹脂樹脂の被覆により、鉄心の連続使用温度が約２０
０〜２５０°Ｃと高いため、リフローはんだ付け（例え
ば遠赤外線リフロー）時に加わる温度、プリヒート温度
の１５０〜１７０°Ｃを２分間印加した後、リフロー時
に２３０°Ｃの３０秒加える熱ストレスには十分耐える
ことができ、よってリフローはんだ付けによる特性のば
らつきがでない高い耐熱性を有したものである。As described above, the iron core according to the present invention has a continuous operating temperature of about 20 due to the coating of the polyimide resin.
Since it is as high as 0 to 250 ° C, the temperature applied during reflow soldering (for example, far infrared reflow) and the preheat temperature of 150 to 170 ° C are applied for 2 minutes, and then the thermal stress of 230 ° C for 30 seconds is applied during reflow. It has sufficient heat resistance, and thus has high heat resistance without variations in characteristics due to reflow soldering.
【００１６】しかも、真空蒸着法により被膜を形成する
ことにより鉄心またはヨークには高精度に管理された均
一な膜厚を確保することができるため、本電磁石装置を
リレーの駆動用として用いた場合には、ポリイミド樹脂
が非磁性体からなっているため、前記鉄心またはヨーク
の磁極面におけるレシジュアルギャップを特別なレシジ
ュアルプレートを用いることなく極めて簡単に管理する
ことができるものである。なお、リレー分野において当
然なことではあるが、前記電磁石の素材である電磁軟鉄
の上にはレシジュアル効果を有する銅系のめっきが施さ
れてあっても本ポリイミド樹脂は真空蒸着による膜厚寸
法の管理ができるので実際に微細なレシジュアルギャッ
プの管理は本ポリイミド樹脂の膜厚により管理されるも
のである。Moreover, since a uniform film thickness controlled with high accuracy can be secured in the iron core or the yoke by forming the film by the vacuum deposition method, when the present electromagnet device is used for driving a relay. In addition, since the polyimide resin is made of a non-magnetic material, the residual gap in the magnetic pole surface of the iron core or the yoke can be managed very easily without using a special residual plate. Incidentally, as is obvious in the field of relays, the present polyimide resin has a film thickness dimension by vacuum vapor deposition even if copper-based plating having a reductive effect is applied on the electromagnetic soft iron which is a material of the electromagnet. Since the control is possible, the control of the fine residual gap is actually controlled by the film thickness of the polyimide resin.
【００１７】[0017]
【発明の効果】請求項１の鉄心は、プリント基板上に実
装されるリレーに組み込まれ、外周にコイルを巻回して
おり、該鉄心の表面に蒸着によりポリイミド樹脂の薄膜
を被覆していることにより、鉄心部分が小形でありなが
らコイル占積率を高めることができるため超小形の電磁
石を構成することができる。The iron core according to claim 1 is incorporated in a relay mounted on a printed circuit board, a coil is wound around the outer periphery, and the surface of the iron core is covered with a thin film of a polyimide resin by vapor deposition. As a result, the space factor of the coil can be increased while the core portion is small, so that an ultra-small electromagnet can be constructed.
【００１８】請求項２の鉄心は、真空蒸着により３〜５
ミクロンのポリイミド樹脂を被覆しているので、コイル
と鉄心間の十分な電気的絶縁性を保ったうえでコイルを
巻回する鉄心部分の大きさを極力小さくすることができ
るため、超小形の電磁石を構成できるとともに真空蒸着
法による蒸着なので前記鉄心の磁極面においても均一な
ポリイミド樹脂の膜厚３〜５ミクロンが確保できるた
め、リレーとして用いた場合所要のレシジュアルギャッ
プを高精度で管理でき、従来のレシジュアルプレートが
不要となるばかりでなく、該レシジュアルプレートを鉄
心等に取着する時の製造ばらつきによるレシジュアルギ
ャップのばらつきがなくなり、復帰特性の安定したリレ
ーを構成することができる。The iron core according to claim 2 is 3-5 by vacuum deposition.
Since it is coated with micron polyimide resin, the size of the core around which the coil is wound can be made as small as possible while maintaining sufficient electrical insulation between the coil and the core. In addition, since it can be formed by a vacuum evaporation method, a uniform polyimide resin film thickness of 3 to 5 microns can be secured even on the magnetic pole surface of the iron core. Therefore, when used as a relay, the required residual gap can be managed with high accuracy, Not only does the conventional residual plate become unnecessary, but the variation in the residual gap due to the variation in manufacturing when attaching the residual plate to an iron core or the like is eliminated, and a relay having stable return characteristics can be configured.
Claims (2)
み込まれ、外周にコイルを巻回した鉄心であって、該鉄
心の表面に蒸着によりポリイミド樹脂の薄膜を被覆して
なることを特徴とする鉄心。1. An iron core, which is incorporated in a relay mounted on a printed circuit board and has a coil wound around its outer periphery, wherein the surface of the iron core is coated with a thin film of a polyimide resin by vapor deposition. Iron core.
ンのポリイミド樹脂を被覆してなる請求項１記載の鉄
心。2. The iron core according to claim 1, wherein the iron core is coated with a polyimide resin of 3 to 5 μm by vacuum deposition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5004996A JP2522237B2 (en) | 1993-01-14 | 1993-01-14 | Iron core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5004996A JP2522237B2 (en) | 1993-01-14 | 1993-01-14 | Iron core |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06168818A true JPH06168818A (en) | 1994-06-14 |
| JP2522237B2 JP2522237B2 (en) | 1996-08-07 |
Family
ID=11599212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5004996A Expired - Lifetime JP2522237B2 (en) | 1993-01-14 | 1993-01-14 | Iron core |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2522237B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08111160A (en) * | 1994-10-06 | 1996-04-30 | Mitsuki Nagamoto | Rotation fulcrum type polarized electromagnet, rotation fulcrum type polarized relay incorporating the same, and manufacturing method thereof |
| EP0764956A3 (en) * | 1995-09-22 | 1997-05-02 | Siemens Matsushita Components | |
| JPH09288957A (en) * | 1996-04-23 | 1997-11-04 | Matsushita Electric Works Ltd | Electromagnetic relay and its manufacture |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59128709U (en) * | 1983-02-18 | 1984-08-30 | 株式会社東芝 | electromagnet device |
-
1993
- 1993-01-14 JP JP5004996A patent/JP2522237B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59128709U (en) * | 1983-02-18 | 1984-08-30 | 株式会社東芝 | electromagnet device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08111160A (en) * | 1994-10-06 | 1996-04-30 | Mitsuki Nagamoto | Rotation fulcrum type polarized electromagnet, rotation fulcrum type polarized relay incorporating the same, and manufacturing method thereof |
| EP0764956A3 (en) * | 1995-09-22 | 1997-05-02 | Siemens Matsushita Components | |
| JPH09288957A (en) * | 1996-04-23 | 1997-11-04 | Matsushita Electric Works Ltd | Electromagnetic relay and its manufacture |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2522237B2 (en) | 1996-08-07 |
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