JP4365601B2

JP4365601B2 - Electromagnetic device and lighting fixture

Info

Publication number: JP4365601B2
Application number: JP2003062132A
Authority: JP
Inventors: 宣敏松崎; 英男福元; 佳伸柴田
Original assignee: Panasonic Corp; Matsushita Electric Works Ltd
Current assignee: Panasonic Corp; Panasonic Electric Works Co Ltd
Priority date: 2003-03-07
Filing date: 2003-03-07
Publication date: 2009-11-18
Anticipated expiration: 2023-03-07
Also published as: JP2004273745A

Description

【０００１】
【発明の属する技術分野】
本発明は、放電灯用の安定器などに用いられる電磁装置およびそれを用いた照明器具に関するものである。
【０００２】
【従来の技術】
従来より、放電灯用の安定器などに用いられる電磁装置として、図１０（ａ）に示すようにＥ型鉄芯１１’とＴ型鉄芯１２’とを組み合わせて日字状の鉄芯１’を構成し、図１０（ｂ）に示すように鉄芯１’の一部にコイル３’を巻回したものが提供されている。ここにおいて、図１０（ｂ）に示す構成の電磁装置は、鉄芯１’の一部にインピーダンスを調整するためのギャップ２’（図１０（ａ）参照）が設けられている。
【０００３】
上述の電磁装置においては、Ｅ型鉄芯１１’の中央片１１ａ’とＴ型鉄芯１２’の脚片１２ａ’とでコイル３’が巻回される第１の鉄芯部１ａを構成し、Ｅ型鉄芯１１’の中央片１１ａ’以外の部分とＴ型鉄芯１２’の脚片１２ａ’以外の部分とで第１の鉄芯部１ａ’およびコイル３’を囲み第１の鉄芯部１ａ’に磁気的に結合した第２の鉄芯部１ｂ’を構成しており、Ｅ型鉄芯１１’とＴ型鉄芯１２’とを結合するとともに漏れ磁束の均一化を図るために第１の鉄芯部１ａ’に上記ギャップ２’が設けられている。すなわち、上述の電磁装置では、Ｅ型鉄芯１１’の中央片１１ａ’の長さを当該Ｅ型鉄芯１１’の両側片１１ｂ’，１１ｂ’の長さ寸法よりも短くしてあり、Ｅ型鉄芯１１’の中央片１１ａ’の先端面とＴ型鉄芯１２’の脚片１２ａ’の先端面との間に上記ギャップ２’が形成されている。したがって、上記ギャップ２’は、鉄芯１’においてコイル３’が巻回される部分に形成されており、コイル３’の内側に位置している。
【０００４】
また、放電灯用の安定器などに用いられる電磁装置としては、中央片と両側片との長さ寸法が同じＥ型鉄芯とＩ型鉄芯とを組み合わせて日字状の鉄芯を構成し、Ｉ型鉄芯におけるＥ型鉄芯との対向面に凹部を設けることによりギャップを形成したものが知られている（例えば、特許文献１参照）
【０００５】
【特許文献１】
特開平１０−１６３０３６号公報（第２頁−第３頁、図１−図３）
【０００６】
【発明が解決しようとする課題】
近年、電化製品の低騒音化が要望されており、上述のような電磁装置においては、磁束の漏れが発生するギャップ近傍での振動を抑制するために鉄芯に設けられたギャップに絶縁性樹脂（例えば、接着剤など）を振動抑制剤として充填することが必要不可欠になってきた。
【０００７】
しかしながら、上述の図１０（ｂ）に示す構成の電磁装置では、鉄芯１’とコイル３’とを組み合わせた状態においてギャップ２’がコイル３’により覆われているので、ギャップ２’へ絶縁性樹脂を注入して充填することが困難であり、インピーダンスが変動してしまう恐れがあった。
【０００８】
また、上記特許文献１に開示された電磁装置においても、Ｉ型鉄芯における凹部はＥ型鉄芯との対向面のみが開放されているので、ギャップへ絶縁性樹脂を注入して充填することが難しかった。
【０００９】
本発明は上記事由に鑑みて為されたものであり、その目的は、鉄芯の一部に設けられたギャップへの絶縁性樹脂の充填が容易で低騒音化が可能な電磁装置およびそれを用いた照明器具を提供することにある。
【００１０】
【課題を解決するための手段】
請求項１の発明は、上記目的を達成するために、コイルが巻回された第１の鉄芯部と、第１の鉄芯部およびコイルを囲み第１の鉄芯部に磁気的に結合した第２の鉄芯部とで鉄芯を構成し、鉄芯の一部にインピーダンスを調整するためのギャップを設け当該ギャップに絶縁性樹脂を充填するようにした電磁装置であって、鉄芯においてコイルが巻回される部分を避けるようにギャップを設けてなることを特徴とする。
【００１２】
また、請求項１の発明は、前記鉄芯がＥ型鉄芯とＩ型鉄芯とを組み合わせて日字状に形成され、Ｅ型鉄芯の中央片が前記第１の鉄芯部を構成するとともに、Ｅ型鉄芯の中央片以外の部分とＩ型鉄芯とで前記第２の鉄芯部を構成し、Ｉ型鉄芯は、Ｅ型鉄芯の中央片の先端面との対向面に、Ｅ型鉄芯の中央片の先端部が挿入され且つ当該先端部との間に前記ギャップを形成する凹所が設けられてなり、且つＥ型鉄芯の中央片の長さ寸法を両側片の長さ寸法よりも短くして、Ｅ型鉄芯の両側片の先端部間にＩ形鉄芯が介在し、且つ中央片とＩ型鉄芯との間のみに前記ギャップが形成されていることを特徴とする。
【００１５】
請求項２の発明は、器具本体に保持されて光源を点灯させる安定器として請求項１記載の電磁装置を備えてなることを特徴とする。
【００１６】
【発明の実施の形態】
（参考例１）
本参考例の電磁装置は、図１（ａ）に示すようにＣ型鉄芯１３とＴ型鉄芯１２とを組み合わせて日字状の鉄芯１を構成し、図１（ｂ）に示すように鉄芯１の一部にコイル３を巻回してある。ここにおいて、鉄芯１の一部には電磁装置自体のインピーダンスを調整するためのギャップ２（図１（ａ）参照）が設けられている。
【００１７】
本参考例の電磁装置においては、Ｔ型鉄芯１２の脚片１２ａがコイル３を巻回する第１の鉄芯部１ａを構成し、Ｃ型鉄芯１３とＴ型鉄芯１２の脚片１２ａ以外の部分とで第１の鉄芯部１ａおよびコイル３を囲み第１の鉄芯部１ａに磁気的に結合した第２の鉄芯部１ｂを構成している。すなわち、第１の鉄芯部１ａはＩ字状に形成され、第２の鉄芯部１ｂはロ字状に形成されている。なお、図１（ａ），（ｂ）中の一点鎖線は鉄芯１に形成される磁路を示している。
【００１８】
ところで、図１０に示した従来構成においては第１の鉄芯部１ａ’にギャップ２’を設けていたが、本参考例では、Ｃ型鉄芯１３に、Ｔ型鉄芯１２の脚片１２ａの先端面との対向面に、Ｔ型鉄芯１２の脚片１２ａの先端部が挿入され且つ当該先端部との間にギャップ２を形成する凹所１３ｃを設けてある。ここに、第２の鉄芯部１ｂの周方向において、図２（ａ）に示すようにＣ型鉄芯１３の凹所１３ｃの開口幅をＨ１、図２（ｂ）に示すようにＴ型鉄芯１２の脚片１２ａの幅をＨ２とすれば、凹所１３ｃの開口幅Ｈ１を脚片１２ａの幅Ｈ２よりも大きく設定してあり（つまり、Ｈ１＞Ｈ２）、ギャップ２は、Ｃ型鉄芯１３の凹所１３ｃの内底面とＴ型鉄芯１２の脚片１２ａの先端面との間のみでなく、Ｃ型鉄芯１３の凹所１３ｃの両内側面とＴ型鉄芯１２の脚片１２ａの先端部の両側面との間にも形成されている。
【００１９】
また、本参考例の電磁装置は、図３に示すように一面が開口した直方体状のケース４に収納した状態でディスペンサ６から振動抑制剤としての絶縁性樹脂６ｂを押し出して注入することでギャップ２へ絶縁性樹脂６ｂを充填している。なお、本参考例の電磁装置は、光源である放電灯を点灯させる安定器として用いられるものであり、図示しない照明器具の器具本体に保持される。
【００２０】
しかして、本参考例の電磁装置では、鉄芯１においてコイル３が巻回される部分を避けてギャップ２を設けるようにしてあるので、Ｔ型鉄芯１２の脚片１２ａにコイル３を巻回してからＴ型鉄芯１２とＣ型鉄芯１３とを結合した後でも（つまり、鉄芯１とコイル３とを組み合わせた後でも）、鉄芯１の一部に設けたギャップ２へ絶縁性樹脂６ｂを容易に充填することができ、通電時におけるギャップ２近傍での鉄芯１の振動を抑制することができて低騒音化を図ることができる。また、ギャップ２へ絶縁性樹脂６ｂを充填することでギャップ長が変化しにくくなり電磁装置自体のインピーダンスの変動を抑制することができる。したがって、上述の照明器具では、放電灯を安定して点灯させることができるとともに、コイル３へ通電した点灯時の低騒音化を図ることができる。
【００２１】
（実施形態）
本実施形態の電磁装置は、図４（ａ）に示すようにＥ型鉄芯１１とＩ型鉄芯１４とを組み合わせて日字状の鉄芯１を構成し、図４（ｂ）に示すように鉄芯１の一部にコイル３を巻回してある。ここにおいて、鉄芯１の一部には電磁装置自体のインピーダンスを調整するためのギャップ２（図４（ａ）参照）が設けられている。
【００２２】
本実施形態の電磁装置においては、Ｅ型鉄芯１１の中央片１１ａがコイル３を巻回する第１の鉄芯部１ａを構成し、Ｅ型鉄芯１１の中央片１１ａ以外の部分とＩ型鉄芯１４とで第１の鉄芯部１ａおよびコイル３を囲み第１の鉄芯部１ａに磁気的に結合した第２の鉄芯部１ｂを構成している。すなわち、第１の鉄芯部１ａはＩ字状に形成され、第２の鉄芯部１ｂはロ字状に形成されている。なお、図４（ａ），（ｂ）中の一点鎖線は鉄芯１に形成される磁路を示している。
【００２３】
ところで、図１０に示した従来構成においては第１の鉄芯部１ａ’にギャップ２’を設けていたが、本実施形態では、Ｅ型鉄芯１１の中央片１１ａの長さ寸法を両側片１１ｂ，１１ｂの長さ寸法よりも短く設定してあり、Ｉ型鉄芯１４に、Ｅ型鉄芯１１の中央片１１ａの先端面との対向面に、Ｅ型鉄芯１１の中央片１１ａの先端部が挿入され且つ当該先端部との間にギャップ２を形成する凹所１４ｃを設けてある。ここに、第２の鉄芯部１ｂの周方向において、図５（ａ）に示すようにＩ型鉄芯１４の凹所１４ｃの開口幅をＨ３、図５（ｂ）に示すようにＥ型鉄芯１１の中央片１１ａの幅をＨ４とすれば、凹所１４ｃの開口幅Ｈ３を中央片１２ａの幅Ｈ４よりも大きく設定してあり（つまり、Ｈ３＞Ｈ４）、ギャップ２は、Ｉ型鉄芯１４の凹所１４ｃの内底面とＥ型鉄芯１１の中央片１１ａの先端面との間のみでなく、Ｉ型鉄芯１４の凹所１４ｃの両内側面とＥ型鉄芯１１の中央片１１ａの先端部の両側面との間にも形成されている。なお、本実施形態における鉄芯１は、Ｅ型鉄芯１１の両側片１１ｂ，１１ｂ間の寸法がＩ型鉄芯１４の長手方向の寸法に略等しくなるように設定されており、Ｅ型鉄芯１１の両側片１１ｂ，１１ｂの先端部間にＩ型鉄芯１４を介在させた形で鉄芯１が構成されている。
【００２４】
また、本実施形態の電磁装置は、参考例１と同様にケース４（図３参照）に収納した状態で振動抑制剤としての絶縁性樹脂を注入して絶縁性樹脂をギャップ２へ充填している。なお、本実施形態の電磁装置は、参考例１と同様に光源である放電灯を点灯させる安定器として用いられるものであり、図示しない照明器具の器具本体に保持される。
【００２５】
しかして、本実施形態の電磁装置では、鉄芯１においてコイル３が巻回される部分を避けてギャップ２を設けるようにしてあるので、Ｅ型鉄芯１１の中央片１１ａにコイル３を巻回してからＥ型鉄芯１１とＩ型鉄芯１４とを結合した後でも（つまり、鉄芯１とコイル３とを組み合わせた後でも）、鉄芯１の一部に設けたギャップ２へ絶縁性樹脂を容易に充填することができ、通電時におけるギャップ２近傍での鉄芯１の振動を抑制することができて低騒音化を図ることができる。また、ギャップ２へ絶縁性樹脂を充填することでギャップ長が変化しにくくなり電磁装置自体のインピーダンスの変動を抑制することができる。
【００２６】
（参考例２）
本参考例の電磁装置は、図６（ａ）に示すようにロ型鉄芯１５とＩ型鉄芯１６とを組み合わせて日字状の鉄芯１を構成し、図６（ｂ）に示すように鉄芯１の一部にコイル３を巻回してある。ここにおいて、鉄芯１の一部には電磁装置自体のインピーダンスを調整するためのギャップ２（図６（ａ）参照）が設けられている。
【００２７】
本参考例の電磁装置においては、Ｉ型鉄芯１６がコイル３を巻回する第１の鉄芯部１ａを構成し、ロ型鉄芯１５が第１の鉄芯部１ａおよびコイル３を囲み第１の鉄芯部１ａに磁気的に結合した第２の鉄芯部１ｂを構成している。すなわち、第１の鉄芯部１ａはＩ字状に形成され、第２の鉄芯部１ｂはロ字状に形成されている。なお、図６（ａ）中の一点鎖線は鉄芯１に形成される磁路を示している。
【００２８】
ところで、図１０に示した従来構成においては第１の鉄芯部１ａ’にギャップ２’を設けていたが、本参考例では、Ｉ型鉄芯１６の長手方向の寸法を、当該長手方向に沿ったロ型鉄芯１５の開口幅よりも長く設定してあり、ロ型鉄芯１５に、Ｉ型鉄芯１６の長手方向の一端面（図６（ａ）における下端面）との対向面に、Ｉ型鉄芯１６の一端部が挿入され且つ当該一端部との間にギャップ２を形成する凹所１５ｃを設けてある。ここに、第２の鉄芯部１ｂの周方向において、図７（ａ）に示すようにロ型鉄芯１５の凹所１５ｃの開口幅をＨ５、図７（ｂ）に示すようにＩ型鉄芯１６の短手方向の幅をＨ６とすれば、凹所１５ｃの開口幅Ｈ５をＩ型鉄芯１６の短手方向の幅Ｈ６よりも大きく設定してあり（つまり、Ｈ５＞Ｈ６）、ギャップ２は、ロ型鉄芯１５の凹所１５ｃの内底面とＩ型鉄芯１６の上記一端面との間のみでなく、ロ型鉄芯１５の凹所１５ｃの両内側面とＩ型鉄芯１６の上記一端部の両側面との間にも形成されている。
【００２９】
また、本参考例の電磁装置は、参考例１と同様にケース４（図３参照）に収納した状態で振動抑制剤としての絶縁性樹脂を注入し絶縁性樹脂をギャップ２へ充填している。なお、本参考例の電磁装置は、参考例１と同様に光源である放電灯を点灯させる安定器として用いられるものであり、図示しない照明器具の器具本体に保持される。
【００３０】
しかして、本参考例の電磁装置では、鉄芯１においてコイル３が巻回される部分を避けてギャップ２を設けるようにしてあるので、Ｉ型鉄芯１６にコイル３を巻回してからＩ型鉄芯１６とロ型鉄芯１５とを結合した後でも（つまり、鉄芯１とコイル３とを組み合わせた後でも）、鉄芯１の一部に設けたギャップ２へ絶縁性樹脂を容易に充填することができ、通電時におけるギャップ２近傍での鉄芯１の振動を抑制することができて低騒音化を図ることができる。また、ギャップ２へ絶縁性樹脂を充填することでギャップ長が変化しにくくなり電磁装置自体のインピーダンスの変動を抑制することができる。
【００３１】
（参考例３）
本参考例の電磁装置は、図８（ａ）に示すようにＥ型鉄芯１１とＩ型鉄芯１７とを組み合わせて日字状の鉄芯１を構成し、図８（ｂ）に示すように鉄芯１の一部にコイル３を巻回してある。ここにおいて、鉄芯１の一部には電磁装置自体のインピーダンスを調整するためのギャップ２（図８（ａ）参照）が設けられている。
【００３２】
本参考例の電磁装置においては、Ｅ型鉄芯１１の中央片１１ａがコイル３を巻回する第１の鉄芯部１ａを構成し、Ｅ型鉄芯１１の中央片１１ａ以外の部分とＩ型鉄芯１７とで第１の鉄芯部１ａおよびコイル３を囲み第１の鉄芯部１ａに磁気的に結合した第２の鉄芯部１ｂを構成している。すなわち、第１の鉄芯部１ａはＩ字状に形成され、第２の鉄芯部１ｂはロ字状に形成されている。なお、図８（ａ），（ｂ）中の一点鎖線は鉄芯１に形成される磁路を示している。
【００３３】
ところで、図１０に示した従来構成においては第１の鉄芯部１ａ’にギャップ２’を設けていたが、本参考例では、Ｅ型鉄芯１１の両側片１１ｂ，１１ｂの長さ寸法Ｈ８（図９参照）を中央片１１ａの長さ寸法Ｈ７（図９参照）よりも短く設定してあり（つまり、Ｈ７＞Ｈ８）、Ｅ型鉄芯１１の両側片１１ｂ，１１ｂの各先端面とＩ型鉄芯１７の長手方向の両端部それぞれとの間にそれぞれギャップ２，２が設けられている。
【００３４】
また、本参考例の電磁装置は、参考例１と同様にケース４（図３参照）に収納した状態で振動抑制剤としての絶縁性樹脂を注入し絶縁性樹脂をギャップ２へ充填している。なお、本参考例の電磁装置は、参考例１と同様に光源である放電灯を点灯させる安定器として用いられるものであり、図示しない照明器具の器具本体に保持される。
【００３５】
しかして、本参考例の電磁装置では、鉄芯１においてコイル３が巻回される部分を避けてギャップ２を設けるようにしてあるので、Ｅ型鉄芯１１の中央片１１ａにコイル３を巻回してからＥ型鉄芯１１とＩ型鉄芯１７とを結合した後でも（つまり、鉄芯１とコイル３とを組み合わせた後でも）、鉄芯１の一部に設けたギャップ２へ絶縁性樹脂６ｂを容易に充填することができ、ギャップ２近傍での鉄芯１の振動を抑制することができて低騒音化を図ることができる。また、ギャップ２へ絶縁性樹脂を充填することでギャップ長が変化しにくくなり電磁装置自体のインピーダンスの変動を抑制することができる。
【００３６】
【発明の効果】
請求項１の発明は、コイルが巻回された第１の鉄芯部と、第１の鉄芯部およびコイルを囲み第１の鉄芯部に磁気的に結合した第２の鉄芯部とで鉄芯を構成し、鉄芯の一部にインピーダンスを調整するためのギャップを設け当該ギャップに絶縁性樹脂を充填するようにした電磁装置であって、鉄芯においてコイルが巻回される部分を避けるようにギャップを設けてなるものであり、鉄芯とコイルとを組み合わせた後でも、鉄芯の一部に設けたギャップへ絶縁性樹脂を容易に充填することができ、ギャップ近傍での鉄芯の振動を抑制することができて低騒音化を図ることができるという効果がある。また、ギャップへ絶縁性樹脂を充填することでギャップ長が変化しにくくなり電磁装置自体のインピーダンスの変動を抑制することができるという効果がある。
【００３７】
請求項２の発明は、器具本体に保持されて光源を点灯させる安定器として請求項１記載の電磁装置を備えてなるものであり、光源を安定して点灯させることができるとともに、低騒音化を図ることができる。
【図面の簡単な説明】
【図１】参考例１を示し、（ａ）は鉄芯の平面図、（ｂ）は鉄芯とコイルとを組み合わせた状態の平面図である。
【図２】同上の要部を示し、（ａ）はＣ型鉄芯の平面図、（ｂ）はＴ型鉄芯の平面図である。
【図３】同上の製造方法の説明図である。
【図４】実施形態を示し、（ａ）は鉄芯の平面図、（ｂ）は鉄芯とコイルとを組み合わせた状態の平面図である。
【図５】同上の要部を示し、（ａ）はＩ型鉄芯の平面図、（ｂ）はＥ型鉄芯の平面図である。
【図６】参考例２を示し、（ａ）は鉄芯の平面図、（ｂ）は鉄芯とコイルとを組み合わせた状態の平面図である。
【図７】同上の要部を示し、（ａ）はロ型鉄芯の平面図、（ｂ）はＩ型鉄芯の平面図である。
【図８】参考例３を示し、（ａ）は鉄芯の平面図、（ｂ）は鉄芯とコイルとを組み合わせた状態の平面図である。
【図９】同上に用いるＥ型鉄芯の平面図である。
【図１０】従来例を示し、（ａ）は鉄芯の平面図、（ｂ）は鉄芯とコイルとを組み合わせた状態の平面図である。
【符号の説明】
１鉄芯
１ａ第１の鉄芯部
１ｂ第２の鉄芯部
２ギャップ
３コイル
４ケース
６ディスペンサ
６ｂ絶縁性樹脂
１１Ｅ型鉄芯
１１ａ中央片
１１ｂ，１１ｂ側片
１２Ｔ型鉄芯
１２ａ脚片
１３Ｃ型鉄芯
１３ｃ凹所
１４Ｉ型鉄芯
１４ｃ凹所
１５ロ型鉄芯
１５ｃ凹所
１６Ｉ型鉄芯
１７Ｉ型鉄芯[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electromagnetic device used in a ballast for a discharge lamp and the like, and a lighting fixture using the same.
[0002]
[Prior art]
Conventionally, as an electromagnetic device used for a ballast for a discharge lamp or the like, as shown in FIG. 10 (a), an E-type iron core 11 'and a T-type iron core 12' are combined to form a Japanese-shaped iron core 1 10 is provided, in which a coil 3 'is wound around a part of an iron core 1' as shown in FIG. 10 (b). Here, in the electromagnetic device having the configuration shown in FIG. 10B, a gap 2 ′ (see FIG. 10A) for adjusting the impedance is provided in a part of the iron core 1 ′.
[0003]
In the electromagnetic device described above, the first iron core portion 1a around which the coil 3 'is wound is constituted by the central piece 11a' of the E-type iron core 11 'and the leg pieces 12a' of the T-type iron core 12 '. The portion other than the central piece 11a ′ of the E-type iron core 11 ′ and the portion other than the leg pieces 12a ′ of the T-type iron core 12 ′ surround the first iron core portion 1a ′ and the coil 3 ′, and the first iron The second iron core portion 1b ′ magnetically coupled to the core portion 1a ′ is configured to connect the E-type iron core 11 ′ and the T-type iron core 12 ′ and to make the leakage magnetic flux uniform. In addition, the gap 2 'is provided in the first iron core portion 1a'. That is, in the electromagnetic device described above, the length of the central piece 11a ′ of the E-type iron core 11 ′ is shorter than the length dimension of both side pieces 11b ′ and 11b ′ of the E-type iron core 11 ′. The gap 2 'is formed between the front end surface of the central piece 11a' of the mold iron core 11 'and the front end surface of the leg piece 12a' of the T type iron core 12 '. Therefore, the gap 2 ′ is formed in a portion where the coil 3 ′ is wound in the iron core 1 ′ and is located inside the coil 3 ′.
[0004]
In addition, as an electromagnetic device used for ballasts for discharge lamps, etc., a Ni-shaped iron core is configured by combining an E-type iron core and an I-type iron core having the same length dimension between the center piece and both side pieces. And what formed the gap by providing a recessed part in the opposing surface with the E-type iron core in an I-type iron core is known (for example, refer patent document 1).
[0005]
[Patent Document 1]
Japanese Patent Laid-Open No. 10-163036 (page 2 to page 3, FIGS. 1 to 3)
[0006]
[Problems to be solved by the invention]
In recent years, there has been a demand for noise reduction of electrical appliances. In the electromagnetic devices as described above, an insulating resin is provided in the gap provided in the iron core in order to suppress vibration near the gap where magnetic flux leakage occurs. It has become indispensable to fill (for example, an adhesive) as a vibration suppressing agent.
[0007]
However, in the electromagnetic device having the configuration shown in FIG. 10 (b), the gap 2 'is covered with the coil 3' in a state where the iron core 1 'and the coil 3' are combined, so that the gap 2 'is insulated. It was difficult to inject and fill the functional resin, and there was a risk that the impedance would fluctuate.
[0008]
In the electromagnetic device disclosed in Patent Document 1 as well, since the concave portion of the I-type iron core is open only on the surface facing the E-type iron core, the insulating resin is injected into the gap and filled. It was difficult.
[0009]
The present invention has been made in view of the above reasons, and an object of the present invention is to provide an electromagnetic device that can be easily filled with an insulating resin in a gap provided in a part of an iron core and can reduce noise. It is in providing the used lighting fixture.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, a first iron core portion around which a coil is wound, and the first iron core portion and the coil are surrounded and magnetically coupled to the first iron core portion. An electromagnetic device in which an iron core is configured with the second iron core portion, a gap for adjusting impedance is provided in a part of the iron core, and the gap is filled with an insulating resin. A gap is provided so as to avoid a portion around which the coil is wound.
[0012]
In the invention of claim 1, the iron core is formed in a letter shape by combining an E-type iron core and an I-type iron core, and a central piece of the E-type iron core constitutes the first iron core portion. The portion other than the center piece of the E-type iron core and the I-type iron core constitute the second iron core portion, and the I-type iron core is opposed to the front end surface of the center piece of the E-type iron core. The surface is provided with a recess in which the tip of the central piece of the E-type iron core is inserted and the gap is formed between the tip and the length of the central piece of the E-type iron core. The gap is formed only between the center piece and the I-type iron core, with the I-type iron core interposed between the tip portions of both side pieces of the E-type iron core. It is characterized by.
[0015]
The invention of claim 2 is characterized by comprising an electromagnetic device according to claim 1 Symbol placement as held in the fixture body ballast for lighting the light source.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
( Reference Example 1)
As shown in FIG. 1A, the electromagnetic device of this reference example is configured by combining a C-type iron core 13 and a T-type iron core 12 to form a Ni-shaped iron core 1, and is shown in FIG. 1B. Thus, the coil 3 is wound around a part of the iron core 1. Here, a gap 2 (see FIG. 1A) for adjusting the impedance of the electromagnetic device itself is provided in a part of the iron core 1.
[0017]
In the electromagnetic device of this reference example , the leg pieces 12a of the T-type iron core 12 constitute the first iron core portion 1a around which the coil 3 is wound, and the leg pieces of the C-type iron core 13 and the T-type iron core 12 are used. A portion other than 12a surrounds the first iron core portion 1a and the coil 3 to constitute a second iron core portion 1b that is magnetically coupled to the first iron core portion 1a. That is, the 1st iron core part 1a is formed in I character shape, and the 2nd iron core part 1b is formed in B shape. In addition, the dashed-dotted line in FIG. 1 (a), (b) has shown the magnetic path formed in the iron core 1. FIG.
[0018]
Incidentally, in the conventional configuration shown in FIG. 10, the gap 2 ′ is provided in the first iron core portion 1 a ′, but in this reference example , the leg pieces 12 a of the T-type iron core 12 are provided on the C-type iron core 13. A recess 13c is formed on the surface facing the front end surface of the T- shaped iron core 12 so that the front end portion of the leg piece 12a of the T-type iron core 12 is inserted and the gap 2 is formed between the front end portion. Here, in the circumferential direction of the second iron core portion 1b, the opening width of the recess 13c of the C-type iron core 13 is H1 as shown in FIG. 2 (a), and the T-type is shown in FIG. 2 (b). If the width of the leg piece 12a of the iron core 12 is H2, the opening width H1 of the recess 13c is set larger than the width H2 of the leg piece 12a (that is, H1> H2), and the gap 2 is a C-type. Not only between the inner bottom surface of the recess 13 c of the iron core 13 and the tip surface of the leg piece 12 a of the T-type iron core 12, but also both inner side surfaces of the recess 13 c of the C-type iron core 13 and the T-type iron core 12. It is also formed between both side surfaces of the distal end portion of the leg piece 12a.
[0019]
In addition, the electromagnetic device of this reference example has a gap formed by extruding and injecting an insulating resin 6b as a vibration suppressing agent from a dispenser 6 in a state of being accommodated in a rectangular parallelepiped case 4 having an opening on one side as shown in FIG. 2 is filled with an insulating resin 6b. Note that the electromagnetic device of this reference example is used as a ballast for lighting a discharge lamp as a light source, and is held by a fixture body of a lighting fixture (not shown).
[0020]
Therefore, in the electromagnetic device of this reference example , the gap 2 is provided so as to avoid the portion of the iron core 1 around which the coil 3 is wound. Therefore, the coil 3 is wound around the leg piece 12a of the T-type iron core 12. Even after the T-type iron core 12 and the C-type iron core 13 are joined after being turned (that is, even after the iron core 1 and the coil 3 are combined), the gap 2 provided in a part of the iron core 1 is insulated. The conductive resin 6b can be easily filled, and the vibration of the iron core 1 in the vicinity of the gap 2 when energized can be suppressed, so that the noise can be reduced. Further, by filling the gap 2 with the insulating resin 6b, the gap length is hardly changed, and the fluctuation of the impedance of the electromagnetic device itself can be suppressed. Therefore, in the above-described lighting fixture, the discharge lamp can be stably lit, and noise can be reduced when the coil 3 is energized.
[0021]
(Working-shaped state)
As shown in FIG. 4A, the electromagnetic device according to the present embodiment combines the E-type iron core 11 and the I-type iron core 14 to form the Ni-shaped iron core 1, and is shown in FIG. 4B. Thus, the coil 3 is wound around a part of the iron core 1. Here, a gap 2 (see FIG. 4A) for adjusting the impedance of the electromagnetic device itself is provided in a part of the iron core 1.
[0022]
In the electromagnetic device of the present embodiment, the central piece 11a of the E-type iron core 11 constitutes the first iron core portion 1a around which the coil 3 is wound, and the portion other than the central piece 11a of the E-type iron core 11 and I The mold iron core 14 surrounds the first iron core portion 1a and the coil 3 to constitute a second iron core portion 1b that is magnetically coupled to the first iron core portion 1a. That is, the 1st iron core part 1a is formed in I character shape, and the 2nd iron core part 1b is formed in B shape. In addition, the dashed-dotted line in FIG. 4 (a), (b) has shown the magnetic path formed in the iron core 1. FIG.
[0023]
By the way, in the conventional configuration shown in FIG. 10, the gap 2 ′ is provided in the first iron core portion 1a ′. However, in this embodiment, the length dimension of the central piece 11a of the E-type iron core 11 is set to both side pieces. 11b, 11b is set to be shorter than the length dimension, and the I-type iron core 14 is provided with the center piece 11a of the E-type iron core 11 on the surface facing the front end surface of the center piece 11a of the E-type iron core 11. A recess 14c is provided in which the distal end is inserted and the gap 2 is formed between the distal end. Here, in the circumferential direction of the second iron core portion 1b, the opening width of the recess 14c of the I-type iron core 14 is H3 as shown in FIG. 5 (a), and the E type is shown in FIG. 5 (b). If the width of the central piece 11a of the iron core 11 is H4, the opening width H3 of the recess 14c is set larger than the width H4 of the central piece 12a (that is, H3> H4), and the gap 2 is an I-type. Not only between the inner bottom surface of the recess 14 c of the iron core 14 and the front end surface of the central piece 11 a of the E-type iron core 11, both inner side surfaces of the recess 14 c of the I-type iron core 14 and the E-type iron core 11 It is also formed between both side surfaces of the tip of the central piece 11a. In addition, the iron core 1 in this embodiment is set so that the dimension between both side pieces 11b, 11b of the E-type iron core 11 is substantially equal to the length of the I-type iron core 14 in the longitudinal direction. The iron core 1 is configured in such a manner that an I-type iron core 14 is interposed between the tip portions of both side pieces 11b, 11b of the core 11.
[0024]
Further, in the electromagnetic device according to the present embodiment, in the state of being housed in the case 4 (see FIG. 3), the insulating resin as a vibration suppressing agent is injected into the gap 2 in the same manner as in Reference Example 1 to fill the gap 2 with the insulating resin. Yes. In addition, the electromagnetic device of this embodiment is used as a ballast which lights the discharge lamp which is a light source similarly to the reference example 1, and is hold | maintained at the fixture main body of the lighting fixture which is not shown in figure.
[0025]
Therefore, in the electromagnetic device of the present embodiment, the gap 2 is provided so as to avoid the portion of the iron core 1 around which the coil 3 is wound. Therefore, the coil 3 is wound around the central piece 11 a of the E-type iron core 11. Even after the E-type iron core 11 and the I-type iron core 14 are coupled after being turned (that is, even after the iron core 1 and the coil 3 are combined), the gap 2 provided in a part of the iron core 1 is insulated. The conductive resin can be easily filled, and the vibration of the iron core 1 in the vicinity of the gap 2 when energized can be suppressed, so that the noise can be reduced. Also, by filling the gap 2 with an insulating resin, the gap length is less likely to change, and fluctuations in impedance of the electromagnetic device itself can be suppressed.
[0026]
( Reference Example 2 )
As shown in FIG. 6 (a), the electromagnetic device of this reference example is configured by combining a B-shaped iron core 15 and an I-shaped iron core 16 to form a Ni-shaped iron core 1, which is shown in FIG. 6 (b). Thus, the coil 3 is wound around a part of the iron core 1. Here, a gap 2 (see FIG. 6A) for adjusting the impedance of the electromagnetic device itself is provided in a part of the iron core 1.
[0027]
In the electromagnetic device of this reference example , the I-type iron core 16 constitutes the first iron core portion 1 a around which the coil 3 is wound, and the B-type iron core 15 surrounds the first iron core portion 1 a and the coil 3. A second iron core portion 1b magnetically coupled to the first iron core portion 1a is configured. That is, the 1st iron core part 1a is formed in I character shape, and the 2nd iron core part 1b is formed in B shape. In addition, the dashed-dotted line in Fig.6 (a) has shown the magnetic path formed in the iron core 1. FIG.
[0028]
By the way, in the conventional configuration shown in FIG. 10, the gap 2 ′ is provided in the first iron core portion 1 a ′. However, in this reference example , the dimension in the longitudinal direction of the I-type iron core 16 is set in the longitudinal direction. The opening width is set to be longer than the opening width of the B-shaped iron core 15 along the opposite surface of the B-shaped iron core 15 to one end surface in the longitudinal direction of the I-type iron core 16 (the lower end surface in FIG. 6A). In addition, a recess 15c is formed in which one end of the I-type iron core 16 is inserted and the gap 2 is formed between the one end. Here, in the circumferential direction of the second iron core portion 1b, the opening width of the recess 15c of the B-shaped iron core 15 is H5 as shown in FIG. 7A, and the I-type as shown in FIG. 7B. If the width in the short direction of the iron core 16 is H6, the opening width H5 of the recess 15c is set to be larger than the width H6 in the short direction of the I-type iron core 16 (that is, H5> H6). The gap 2 is not only between the inner bottom surface of the recess 15 c of the B-shaped iron core 15 and the one end surface of the I-type iron core 16, but also both inner surfaces of the recess 15 c of the B-shaped iron core 15 and the I-type iron. It is also formed between both side surfaces of the one end of the core 16.
[0029]
In addition, the electromagnetic device of this reference example is filled with the insulating resin in the gap 2 by injecting an insulating resin as a vibration suppressor while being housed in the case 4 (see FIG. 3) in the same manner as the reference example 1. . Note that the electromagnetic device of this reference example is used as a ballast for turning on a discharge lamp as a light source in the same manner as in Reference Example 1, and is held by a fixture body of a lighting fixture (not shown).
[0030]
Therefore, in the electromagnetic device of this reference example , the gap 2 is provided so as to avoid the portion of the iron core 1 around which the coil 3 is wound. Therefore, after the coil 3 is wound around the I-type iron core 16, the I Even after the iron core 16 and the iron core 15 are joined (that is, after the iron core 1 and the coil 3 are combined), the insulating resin can be easily applied to the gap 2 provided in a part of the iron core 1. The vibration of the iron core 1 in the vicinity of the gap 2 during energization can be suppressed, and noise can be reduced. Also, by filling the gap 2 with an insulating resin, the gap length is less likely to change, and fluctuations in impedance of the electromagnetic device itself can be suppressed.
[0031]
( Reference Example 3 )
As shown in FIG. 8 (a), the electromagnetic device of this reference example is configured by combining an E-type iron core 11 and an I-type iron core 17 to form a Ni-shaped iron core 1, and is shown in FIG. 8 (b). Thus, the coil 3 is wound around a part of the iron core 1. Here, a gap 2 (see FIG. 8A) for adjusting the impedance of the electromagnetic device itself is provided in a part of the iron core 1.
[0032]
In the electromagnetic device of this reference example , the central piece 11a of the E-type iron core 11 constitutes the first iron core portion 1a around which the coil 3 is wound, and the portion other than the central piece 11a of the E-type iron core 11 and I The mold iron core 17 surrounds the first iron core portion 1a and the coil 3 to constitute a second iron core portion 1b magnetically coupled to the first iron core portion 1a. That is, the 1st iron core part 1a is formed in I character shape, and the 2nd iron core part 1b is formed in B shape. In addition, the dashed-dotted line in FIG. 8 (a), (b) has shown the magnetic path formed in the iron core 1. FIG.
[0033]
Incidentally, in the conventional configuration shown in FIG. 10, the gap 2 ′ is provided in the first iron core portion 1a ′. However, in this reference example , the length dimension H8 of both side pieces 11b, 11b of the E-type iron core 11 is provided. (See FIG. 9) is set to be shorter than the length dimension H7 (see FIG. 9) of the central piece 11a (that is, H7> H8), and the front end surfaces of both side pieces 11b, 11b of the E-type iron core 11 Gaps 2 and 2 are respectively provided between both ends of the I-type iron core 17 in the longitudinal direction.
[0034]
In addition, the electromagnetic device of this reference example is filled with the insulating resin in the gap 2 by injecting an insulating resin as a vibration suppressor while being housed in the case 4 (see FIG. 3) in the same manner as the reference example 1. . Note that the electromagnetic device of this reference example is used as a ballast for turning on a discharge lamp as a light source in the same manner as in Reference Example 1, and is held by a fixture body of a lighting fixture (not shown).
[0035]
Thus, in the electromagnetic device of this reference example , the gap 2 is provided so as to avoid the portion of the iron core 1 around which the coil 3 is wound. Therefore, the coil 3 is wound around the central piece 11 a of the E-type iron core 11. Even after the E-type iron core 11 and the I-type iron core 17 are joined after turning (ie, even after the iron core 1 and the coil 3 are combined), the gap 2 provided in a part of the iron core 1 is insulated. The resin 6b can be easily filled, and the vibration of the iron core 1 in the vicinity of the gap 2 can be suppressed, so that the noise can be reduced. Also, by filling the gap 2 with an insulating resin, the gap length is less likely to change, and fluctuations in impedance of the electromagnetic device itself can be suppressed.
[0036]
【The invention's effect】
The invention of claim 1 includes a first iron core portion around which a coil is wound, a second iron core portion that surrounds the first iron core portion and the coil and is magnetically coupled to the first iron core portion, and An electromagnetic device in which an iron core is configured, a gap for adjusting impedance is provided in a part of the iron core, and the gap is filled with an insulating resin, the coil being wound around the iron core The gap is provided so that the insulating resin can be easily filled into the gap provided in a part of the iron core even after the iron core and the coil are combined. There is an effect that the vibration of the iron core can be suppressed and the noise can be reduced. In addition, filling the gap with an insulating resin makes it difficult for the gap length to change, and has the effect of suppressing fluctuations in the impedance of the electromagnetic device itself.
[0037]
According to a second aspect of the invention are those comprising an electromagnetic device according to claim 1 Symbol placement as ballast for lighting the light source is held in the instrument body, with a light source can be lit stably, low noise Can be achieved.
[Brief description of the drawings]
1A and 1B show a reference example 1, in which FIG. 1A is a plan view of an iron core, and FIG. 1B is a plan view of a state in which the iron core and a coil are combined.
FIG. 2 shows the main part of the above, (a) is a plan view of a C-type iron core, (b) is a plan view of a T-type iron core.
FIG. 3 is an explanatory diagram of the manufacturing method of the above.
4A and 4B show an embodiment, in which FIG. 4A is a plan view of an iron core, and FIG. 4B is a plan view of a state in which the iron core and a coil are combined.
FIGS. 5A and 5B show the main part of the above, wherein FIG. 5A is a plan view of an I-type iron core, and FIG. 5B is a plan view of an E-type iron core.
6A and 6B show a reference example 2, in which FIG. 6A is a plan view of an iron core, and FIG. 6B is a plan view of a state in which the iron core and a coil are combined.
FIGS. 7A and 7B show the main parts of the above, wherein FIG. 7A is a plan view of a B-shaped iron core, and FIG. 7B is a plan view of an I-type iron core.
8A and 8B show a reference example 3, in which FIG. 8A is a plan view of an iron core, and FIG. 8B is a plan view of a state in which the iron core and a coil are combined.
FIG. 9 is a plan view of an E-type iron core used in the above.
FIG. 10 shows a conventional example, (a) is a plan view of an iron core, and (b) is a plan view of a state in which the iron core and a coil are combined.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Iron core 1a 1st iron core part 1b 2nd iron core part 2 Gap 3 Coil 4 Case 6 Dispenser 6b Insulating resin 11 E type iron core 11a Central piece 11b, 11b Side piece 12 T-type iron core 12a Leg piece 13 C type iron core 13c Recess 14 I type iron core 14c Recess 15 B type iron core 15c Recess 16 I type iron core 17 I type iron core

Claims

An iron core is constituted by a first iron core portion around which a coil is wound, and a second iron core portion that surrounds the first iron core portion and the coil and is magnetically coupled to the first iron core portion, An electromagnetic device in which a gap for adjusting impedance is provided in a part of the iron core, and the gap is filled with an insulating resin, and the gap is provided so as to avoid a portion where the coil is wound around the iron core. The iron core is formed in a letter shape by combining an E-type iron core and an I-type iron core, and a central piece of the E-type iron core constitutes the first iron core portion, and the E-type iron The portion other than the center piece of the core and the I-type iron core constitute the second iron core portion, and the I-type iron core has an E-type iron on the surface facing the tip surface of the center piece of the E-type iron core. The tip of the center piece of the core is inserted, and a recess is provided to form the gap between the tip and the center piece of the E-type iron core. The length is made shorter than the length of both side pieces, an I-type iron core is interposed between the tip portions of both side pieces of the E-type iron core, and the gap is only between the center piece and the I-type iron core. An electromagnetic device characterized in that is formed .

A lighting fixture comprising the electromagnetic device according to claim 1 as a stabilizer which is held by the fixture body and turns on the light source.