JP3806946B2 - Electromagnetic relay - Google Patents

Electromagnetic relay Download PDF

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Publication number
JP3806946B2
JP3806946B2 JP03545995A JP3545995A JP3806946B2 JP 3806946 B2 JP3806946 B2 JP 3806946B2 JP 03545995 A JP03545995 A JP 03545995A JP 3545995 A JP3545995 A JP 3545995A JP 3806946 B2 JP3806946 B2 JP 3806946B2
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Japan
Prior art keywords
fixed
movable
contact
spring portion
armature
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JP03545995A
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JPH08235990A (en
Inventor
修 安孫子
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Panasonic Electric Works Co Ltd
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Matsushita Electric Works Ltd
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Priority to JP03545995A priority Critical patent/JP3806946B2/en
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00Contacts
    • H01H1/58Electric connections to or between contacts; Terminals
    • H01H1/5822Flexible connections between movable contact and terminal

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  • Electromagnets (AREA)

Description

【0001】
【産業上の利用分野】
本発明は、可動接点を設けた導電板が接極子に固着されてなる電磁リレーに関する。
【0002】
【従来の技術】
この種の電磁リレーとして、図7及び図8に示す構成のものが存在する。このものは、鉄芯A と、鉄芯A にコイル枠B1を介して巻回されたコイルB と、鉄芯B に固定されて磁路を形成するL字状の継鉄C と、継鉄C の端部へ回動自在にヒンジ支持されて鉄芯A に吸引される接極子D と、固着部E0でもって接極子D に固着されるとともに一端部に設けた可動接点E11 が固定接点E12 に接触圧を持って当接するよう撓み得る可動ばね部E1及び接極子D をヒンジ支持するよう付勢して継鉄C に固定されるヒンジばね部E2を有する導電板E と、を備えてなっている。
【0003】
詳しくは、導電板E は、可動ばね部E1とヒンジばね部E2との間に位置する固着部E0を可動接点E11 の中心線の両側にそれぞれ設けた接極子D の両突起D1,D1 でもってかしめ固着されている。
【0004】
すなわち、可動ばね部E1は、両突起D1,D1 の最外接線である固着基端部L1よりも可動接点E11 側の部分であって、接極子D が鉄芯A に吸引保持されて可動接点E11 が固定接点E12 に当接したときに撓んで接触圧を確保するようになり、またヒンジばね部E2は接極子D の面から離れる方向へ曲げ部L2から曲げた部分であって、その曲げた部分のばね力で接極子D を継鉄C の端部へ回動自在にヒンジ支持するようになっており、固着基端部L1から曲げ部L2までの間が固着部E0ということになる。なお、ヒンジばね部E2は接極子D を鉄芯A から釈放して元の状態に復帰させるための復帰ばね及び接点電流を流す電路も兼ねている。
【0005】
【発明が解決しようとする課題】
上記した従来の電磁リレーにあっては、接極子D が鉄芯A に吸引保持されて可動ばね部E1の一端部に設けた可動接点E11 が固定接点E12 に当接したときの接点接触圧P は、P=σ・bt2/6lで求まる。ここで、可動ばね部E1の撓み量がσ、長さがl 、板幅がb 、板厚がt である。
【0006】
しかしながら、導電板E は、可動ばね部E1とヒンジばね部E2との間に位置する固着部E0を接極子D の両突起D1,D1 でもってかしめ固着されているから、可動ばね部E1の実質的な長さl は、両突起D1,D1 の最外接線である固着基端部L1から可動接点E11 の中心までの距離となり、固着のためだけに長さ方向のスペースを占有している固着部E0の部分の長さ分だけ短くなる。
【0007】
従って、小型化しようとした場合、可動ばね部E1の長さl は、接極子D が鉄芯A に吸引される吸引力で保持可能な所定の接点接触圧P を得るために必要な長さよりも短くなり過ぎ、つまり接点接触圧P が高くなり過ぎる。そこで、σ,b,tを小さくする必要があり、接点の高容量化が難しいことになる。
【0008】
本発明は、上記事由に鑑みてなしたもので、その目的とするところは、小型で高容量化が可能な電磁リレーを提供することにある。
【0009】
【課題を解決するための手段】
上記した課題を解決するために、請求項1記載のものは、鉄芯と、鉄芯に巻回されたコイルと、鉄芯に固定されて磁路を形成する継鉄と、継鉄へ回動自在にヒンジ支持されて鉄芯に吸引される接極子と、固着部でもって接極子に固着されるとともに長手方向の一端部に設けた可動接点が固定接点に接触圧を持って当接するよう撓み得る可動ばね部及び接極子をヒンジ支持するよう付勢して継鉄に固定されるヒンジばね部を有する長尺状の導電板と、を備えた電磁リレーにおいて、前記導電板は、その長手方向の一方側が可動ばね部で、他方側がヒンジばね部となり、かつ、接極子に固着される固着部を有して構成され、固着部が接極子に設けた楕円状の突起で固着され、前記可動ばね部の他端部には、固着部が可動ばね部との間に切欠部を有して導電板の長手方向であって可動接点側へ向かって延設され、前記ヒンジばね部は、固着部が延設されて繋がっている根元部分である固着基端部にて折曲して形成されており、可動ばね部及びヒンジばね部は固着基端部を境界線として導電板の長手方向の一方側及び他方側をそれぞれ構成されてなる構成にしてある。
【0010】
また、請求項2記載のものは、請求項1記載のものにおいて、前記固着部は、前記可動接点の中心線上に延設されてなる構成にしてある。
【0015】
【作用】
請求項1記載のものによれば、長尺状の導電板は、固着部が可動ばね部又はヒンジばね部との間に切欠部を有して長手方向に延設されることによってその可動ばね部及びヒンジばね部から逃げた状態になり、つまり、可動ばね部とヒンジばね部との間に位置させる必要のない固着部でもって接極子に固着されることになるから、接極子が鉄芯に吸引保持されて可動ばね部の一端部に設けた可動接点が固定接点に当接したときの接点接触圧を決める可動ばね部の実質的な長さは、固着のためだけに存在する固着部に長さ方向のスペースを占有されないため、その部分の長さ分だけ長くなり、小型化した場合でも、可動ばね部の撓み量、板幅、板厚を小さくすることなく、吸引力で保持可能な所定の接点接触圧を得ることができる。
【0016】
また、請求項2記載のものによれば、導電板は、可動接点の中心線上に設けられた1箇所の固着部だけで、接極子に固着できる。
【0021】
【実施例】
本発明の第1実施例を図1及び図2に基づいて以下に説明する。このものは、鉄芯1 、コイル2 、継鉄3 、接極子4 、導電板5 を備えて構成されている。
【0022】
鉄芯1 は、磁性材料により、棒状に形成され、絶縁材料製のコイル枠2aを介してコイル2 が巻回されている。継鉄3 は、磁性材料により、L字状に形成され、その一方片3aが鉄芯1 と平行になるよう他方片3bが鉄芯1 に固着されて、磁路を形成する。
【0023】
接極子4 は、磁性材料により、平板状に形成され、その一方面に導電板5 が固着される。
【0024】
導電板5 は、銅合金等の導電性を有する薄板ばね材料により、長尺状に形成され、その長手方向の一方側が可動ばね部51で、他方側がヒンジばね部52となり、かつ、接極子4 に固着される固着部53を有して構成されている。
【0025】
詳しくは、可動ばね部51の一端部には可動接点51a が設けられ、その可動接点51a の中心線上を通る可動ばね部51の他端部の中央部には、固着部53が可動ばね部51との間に切欠部53a を有して導電板5 の長手方向であって可動接点51a 側へ向かって延設されている。
【0026】
ヒンジばね部52は、可動ばね部51の他端部つまり固着部53が延設されて繋がっている根元部分に略一致した位置である固着基端部L1にて折曲して形成されており、すなわち、可動ばね部51及びヒンジばね部52は固着基端部L1を境界線として導電板5 の長手方向の一方側及び他方側をそれぞれ構成し、固着部53は可動ばね部51とヒンジばね部52との間に位置せずに、可動ばね部51から逃げた状態になっている。またヒンジばね部52は、固着基端部L1にて折曲形成された折曲部52a からさらに逆方向へ略直角に折曲形成された先端部側が外部導出端子部52b となっている。
【0027】
そして、この導電板5 は、固着部53が接極子4 の一方面に設けた楕円状の突起4aでもってかしめ固着されるとともに、ヒンジばね部52の外部導出端子部52b が継鉄3 の一方片3aの外側面に固定される。このとき、ヒンジばね部52は、折曲部52a が接極子4 の一方面に向かって撓む状態で固定されることによって、接極子4 の基端部を継鉄3 の一方片3aの端部へ回動自在にヒンジ支持するよう付勢するとともに、対向した常閉側及び常開側固定接点51b,51c の間に配置された可動接点51a が常閉側固定接点51b に当接するよう接極子4 を復帰させる復帰ばね及び接点電流を流す電路も兼ねている。
【0028】
次に、動作を説明する。まず、コイル2 を励磁すると、図2に示すように、接極子4 は基端部をヒンジばね部52により継鉄3 の一方片3aの端部へ回動自在にヒンジ支持されて先端部側が鉄芯1 に吸引保持される。そうすると、固着部53を接極子4 に固着された導電板5 は、可動ばね部51の一端部に設けた可動接点51a が常閉側固定接点51b から開離して常開側固定接点51c に当接し、そのときの接点接触圧P は、可動ばね部51が固着基端部L1を基端として撓むことによって確保され、P=σ・bt2/6lで求まる。ここで、可動ばね部51の撓み量がσ、長さがl 、板幅がb 、板厚がt であって、その長さl は固着基端部L1から可動接点51a の中心までの距離となる。次いでコイル2 を無励磁にすると、接極子4 はヒンジばね部52の復帰ばね力で鉄芯1 から釈放され、可動接点51a が常閉側固定接点51b に当接する元の状態に復帰する。
【0029】
かかる電磁リレーにあっては、上記したように、長尺状の導電板5 は、固着部53が可動ばね部51との間に切欠部53a を有して長手方向に延設されることによって可動ばね部51とヒンジばね部52との間に位置せずに、可動ばね部51から逃げた状態になり、つまり、可動ばね部51とヒンジばね部52との間に位置させる必要のない固着部53でもって接極子4 に固着されることになるから、接極子4 が鉄芯1 に吸引保持されて可動接点51a が常開側固定接点51c に当接したときの接点接触圧P を決める可動ばね部51の実質的な長さl は、固着のためだけに存在する固着部53に長さ方向のスペースを占有されないため、その部分の長さ分だけ長くなり、小型化した場合でも、可動ばね部51の撓み量σ、板幅b 、板厚t を小さくすることなく、吸引力で保持可能な所定の接点接触圧P を得ることができ、高容量化も可能となる。
【0030】
また、導電板5 は、可動接点51a の中心線上を通る可動ばね部51の中央部に設けられた1箇所の固着部53をかしめ固着するだけで、接極子4 に固着できる。
【0031】
なお、本実施例では、固着部53は、可動ばね部51との間に切欠部53a を有して可動接点51a 側へ向かって延設されている。
【0032】
次に、第1参考例を図3に基づいて以下に説明する。このものは、第1実施例とは導電板5 の構成が異なるだけである。
【0033】
すなわち、第1実施例の導電板5 は、固着部53が、可動接点51a の中心線上に1箇所設けられているのに対し、本参考例の導電板5 では、固着部53が、可動接点51a の中心線の両側2箇所であって、可動ばね部51及びヒンジばね部52の境界線である固着基端部L1に略一致する位置から、導電板5 の長手方向の互いに反対方向へ、すなわち、その1箇所が可動ばね部51との間に切欠部53a を有して可動接点51a 側へ、もう1箇所がヒンジばね部52との間に切欠部53a を有して可動接点51a 側とは反対の方向へ向かってそれぞれ延設され、突起4aでもって接極子4にそれぞれかしめ固着されている。
【0034】
かかる電磁リレーにあっては、導電板5 は、2箇所の固着部53が可動ばね部51とヒンジばね部52との間に位置せずに、可動ばね部51及びヒンジばね部52からそれぞれ逃げた状態になり、第1実施例と同様に、可動接点51a の接点接触圧P を決める可動ばね部51の実質的な長さl は、固着部53に長さ方向のスペースを占有されないため、その部分の長さ分だけ長くなり、やはり小型で高容量化が可能となる。
【0035】
また、2箇所の固着部53は、可動接点51a の中心線の両側に設けられているから、中心線上の1箇所に設けられている第1実施例よりも接極子4 に対してより強固に固着できる。
【0036】
また、2箇所の固着部53は、導電板5 の幅方向のスペースを占有することになるが、可動ばね部51及びヒンジばね部52の境界線である固着基端部L1に略一致する位置から、導電板5 の長手方向の互いに反対方向へそれぞれ分けて延設されているから、可動ばね部51及びヒンジばね部52の板幅は、その一方のみを小さくすることなく、必要な寸法を確保できる。
【0037】
また、第1実施例及び第1参考例のいずれの場合にあっても、導電板5 が接極子4 にかしめ固着される際、固着部53は可動ばね部51又はヒンジばね部52から逃げた状態になっているから、かしめによる応力が可動ばね部51又はヒンジばね部52に伝わり難く、導電板5 の変形による動作特性への影響を防止できる。
【0038】
なお、第1参考例では、可動ばね部51又はヒンジばね部52のどちらか一方の板幅が小さくなってもよい場合は、2箇所の固着部53は、導電板5 の長手方向の同方向へ延設されてもよい。
【0039】
また、第1実施例及び第1参考例のいずれの場合にあっも、固着部53は、かしめでもって接極子4 に固着されているが、溶接等の他の手段を用いてもよい。
【0040】
次に、第2参考例を図4に基づいて以下に説明する。このものは、第1実施例に対し、導電板5 の構成が異なるとともに、外部導出端子片6 及び可撓電線7 が付加されている。
【0041】
すなわち、導電板5 は、従来例と同様にして、可動ばね部51とヒンジばね部52との間に位置する固着部53を接極子4 にかしめ固着されるとともに、ヒンジばね部52が外部導出端子片6 と共に重ねて継鉄3 の一方片3aに固定される。
【0042】
ヒンジばね部52は、固着部53から折曲形成された折曲部52a 及びその折曲部52a からさらに逆方向へ略直角に折曲形成して外部導出端子片6 と重ねられる位置まで板幅の略半分を切り欠いて形成され、また先端部側には第1実施例のような外部導出端子部は存在しない。
【0043】
その外部導出端子部の代わりをするのが外部導出端子片6 の端子部6aであって、この外部導出端子片6 は、導電板5 よりも板厚の厚い導電材料により、平板状に形成されるとともに、継鉄3 の一方片3aに固定された状態で、ヒンジばね部52の折曲部52a の板幅を略半分に切り欠いてある部分に位置する接続部6bが折曲形成されている。
【0044】
また可動接点51a を設けた可動ばね部51の一端部には、幅方向へ延出部51d が延出されており、その延出部51d 及び外部導出端子片6 の上記接続部6bに、導電板5 よりも高導電性で可撓性を有する編組線 (可撓電線)7の両端部がそれぞれ接続されている。このとき、編組線7 は、可動接点51a と略同じ高さの位置を可動ばね部51に平行に並列されることになる。
【0045】
かかる電磁リレーにあっては、可動接点51a を流れる接点電流は、大部分が可動ばね部51の一端部に設けた延出部51d から導電板5 よりも高導電性を有する編組線7 を経由して外部導出端子片6 の接続部6bへ直接流れることになって、可動ばね部51及びヒンジばね部52の導電板5 には殆ど流れずに発熱が抑えられるから、導電板5 の板幅又は板厚を小さくして小型化を図っても、接点電流を大きくして高容量化が可能である。
【0046】
また、編組線7 は、可動接点51a と略同じ高さの位置を可動ばね部51に平行に配設されているから、動作中において可動接点51a に無理な応力が加わり難く、動作への影響も少ない。
【0047】
なお、本参考例では、延出部51d 及び接続部6bには、編組線7 が接続されているが、導電板5 よりも高導電性を有する可撓電線であれば、例えばリード線等の編組線7 以外のものであってもよい。
【0048】
次に、第3参考例を図5及び図6に基づいて以下に説明する。このものは、第2参考例の可撓性を有する編組線(可撓電線)7に代えて、剛性を有する棒状の導電片8 が、その両端部を前記外部導出端子片6 の接続部6b及び前記可動ばね部51の延出部51d に対しそれぞれ摺動可能に接続されている。
【0049】
詳しくは、図6に示すように、外部導出端子片6 の接続部6bには対向板6cが固着れ、また可動ばね部51の延出部51d はU字状に折り返した折返片51e が形成されるとともに、その接続部6b及び対向板6cの対向面と延出部51d 及び折返片51e の対向面とには、それぞれ略三角錐状の小突起が設けられ、この小突起間に導電片8 が導電状態を維持したまま摺動可能に挟持されている。
【0050】
かかる電磁リレーにあっては、第2参考例と同様にして、可動接点51a を流れる接点電流の大部分が、導電板5 よりも高導電性を有する導電片8 を経由して外部導出端子片6 へ直接流れるから、可動ばね部51及びヒンジばね部52の導電板5には殆ど流れずに発熱が抑えられ、小型で高容量化が可能になるとともに、接極子4 が、継鉄3 へ回動自在にヒンジ支持されて鉄芯1 に吸引又は釈放されたとき、図中に矢示するように動作する剛性を有した導電片8 は、外部導出端子片6 の接続部6b及び可動ばね部51の延出部51d に接続された両端部がそれぞれ摺動するために、可動ばね部51に対して応力を及ぼさずに動作できる。
【0051】
【発明の効果】
請求項1記載のものは、長尺状の導電板は、固着部が可動ばね部又はヒンジばね部との間に切欠部を有して長手方向に延設されることによってその可動ばね部及びヒンジばね部から逃げた状態になり、つまり、可動ばね部とヒンジばね部との間に位置させる必要のない固着部でもって接極子に固着されることになるから、接極子が鉄芯に吸引保持されて可動ばね部の一端部に設けた可動接点が固定接点に当接したときの接点接触圧を決める可動ばね部の実質的な長さは、固着のためだけに存在する固着部に長さ方向のスペースを占有されないため、その部分の長さ分だけ長くなり、小型化した場合でも、可動ばね部の撓み量、板幅、板厚を小さくすることなく、吸引力で保持可能な所定の接点接触圧を得ることができ、高容量化も可能となる。
【0052】
また、請求項2記載のものは、請求項1記載のものの効果に加えて、導電板は可動接点の中心線上に設けられた1箇所の固着部だけで接極子に固着できる。
【図面の簡単な説明】
【図1】 本発明の第1実施例を示す斜視図である。
【図2】 同上の動作した状態を示す正面図である。
【図3】 本発明の第1参考例を示す斜視図である。
【図4】 本発明の第2参考例を示す斜視図である。
【図5】 本発明の第3参考例を示す斜視図である。
【図6】 同上の要部を示す部分断面図である。
【図7】 従来例を示す斜視図である。
【図8】 同上の動作した状態を示す正面図である。
【符号の説明】
1 鉄芯
2 コイル
3 継鉄
4 接極子
5 導電板
51 可動ばね部
51a 可動接点
51b 常閉側固定接点
51c 常開側固定接点
52 ヒンジばね部
53 固着部
53a 切欠部
6 外部導出端子片
7 可撓電線
8 導電片
[0001]
[Industrial application fields]
The present invention relates to an electromagnetic relay in which a conductive plate provided with a movable contact is fixed to an armature.
[0002]
[Prior art]
As this type of electromagnetic relay, there are those shown in FIGS. This compound, and the iron core A, the coil B wound through the coil frame B 1 in the iron core A, and L-shaped yoke C for forming a magnetic path are fixed to the iron core B, splicing An armature D that is hinged to the end of iron C and is pivotally supported by the iron core A, and a movable contact E 11 that is fixed to the armature D by the fixing portion E 0 and provided at one end. A conductive plate E having a movable spring part E 1 which can be bent so as to abut against the fixed contact E 12 with contact pressure, and a hinge spring part E 2 which is urged to support the armature D in a hinged manner and fixed to the yoke C And is equipped with.
[0003]
Specifically, the conductive plate E 2 has both protrusions D of the armature D provided with fixing portions E 0 positioned between the movable spring portion E 1 and the hinge spring portion E 2 on both sides of the center line of the movable contact E 11. 1 and D 1 are fixed by caulking.
[0004]
That is, the movable spring portion E 1 is a portion closer to the movable contact E 11 than the fixed base end portion L 1 that is the outermost tangent line of both protrusions D 1 and D 1 , and the armature D is attracted to the iron core A 1. When the movable contact E 11 is held and bends against the fixed contact E 12, it bends and secures the contact pressure, and the hinge spring part E 2 moves away from the surface of the armature D from the bent part L 2. The armature D is bent and supported by the spring force of the bent portion to the end of the yoke C so that the armature D can be pivoted, and the bent base L 1 is bent to the bent portion L 2. The period up to is the fixed part E 0 . The hinge spring portion E 2 also serves as a return spring for releasing the armature D from the iron core A and returning it to the original state and an electric circuit for supplying a contact current.
[0005]
[Problems to be solved by the invention]
In the conventional electromagnetic relay described above, the contact when the armature D is attracted and held by the iron core A and the movable contact E 11 provided at one end of the movable spring portion E 1 contacts the fixed contact E 12. The contact pressure P is obtained by P = σ · bt 2 / 6l. Here, the amount of deflection of the movable spring portion E 1 is sigma, a l length, leaf width b, the plate thickness t.
[0006]
However, the conductive plate E is movable because the fixing portion E 0 located between the movable spring portion E 1 and the hinge spring portion E 2 is fixed by caulking with both projections D 1 and D 1 of the armature D. The substantial length l of the spring part E 1 is the distance from the fixed base end L 1, which is the outermost tangent line of both protrusions D 1 and D 1 , to the center of the movable contact E 11 and is long only for fixing. It becomes shorter by the length of the fixed portion E 0 that occupies the space in the vertical direction.
[0007]
Therefore, when trying to reduce the size, the length l of the movable spring portion E 1 is the length necessary to obtain a predetermined contact contact pressure P that can be held by the attractive force with which the armature D is attracted to the iron core A. The contact contact pressure P becomes too high. Therefore, it is necessary to reduce σ, b, and t, and it is difficult to increase the capacity of the contacts.
[0008]
The present invention has been made in view of the above-mentioned reasons, and an object thereof is to provide an electromagnetic relay that is small in size and capable of increasing its capacity.
[0009]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention includes an iron core, a coil wound around the iron core, a yoke fixed to the iron core to form a magnetic path, and a winding to the yoke. An armature that is hinged to be movable and attracted to the iron core, and is fixed to the armature by the fixing portion, and a movable contact provided at one end in the longitudinal direction is in contact with the fixed contact with a contact pressure. An electromagnetic relay comprising a movable spring portion that can be bent and a long conductive plate having a hinge spring portion that is urged to support the armature to be hinged and fixed to the yoke. One side of the direction is a movable spring portion, the other side is a hinge spring portion, and has a fixing portion fixed to the armature, and the fixing portion is fixed by an elliptical protrusion provided on the armature, The other end of the movable spring portion has a notch portion between the fixed portion and the movable spring portion. The hinge spring portion is formed by being bent at a fixed base end portion which is a root portion where the fixed portion is extended and connected to the movable contact side in the longitudinal direction of the conductive plate. The movable spring portion and the hinge spring portion are configured such that one side and the other side in the longitudinal direction of the conductive plate are configured with the fixed base end portion as a boundary line.
[0010]
According to a second aspect of the present invention, in the first aspect of the present invention, the fixed portion extends on the center line of the movable contact.
[0015]
[Action]
According to the first aspect of the present invention, the elongate conductive plate has a movable spring that has a fixed portion extending in the longitudinal direction with a notch between the movable spring or the hinge spring. The armature and the hinge spring portion escape, that is, the armature is fixed to the armature by the fixing portion that does not need to be positioned between the movable spring portion and the hinge spring portion. The substantial length of the movable spring part that determines the contact contact pressure when the movable contact provided at one end of the movable spring part abuts against the fixed contact is the fixed part that exists only for fixing. Since the space in the length direction is not occupied, it becomes longer by the length of that part, and even if it is downsized, it can be held with suction force without reducing the bending amount, plate width, and plate thickness of the movable spring part A predetermined contact contact pressure can be obtained.
[0016]
According to the second aspect of the present invention, the conductive plate can be fixed to the armature with only one fixing portion provided on the center line of the movable contact.
[0021]
【Example】
A first embodiment of the present invention will be described below with reference to FIGS. This has an iron core 1, a coil 2, a yoke 3, an armature 4, and a conductive plate 5.
[0022]
The iron core 1 is formed in a rod shape from a magnetic material, and the coil 2 is wound through a coil frame 2a made of an insulating material. The yoke 3 is formed in an L shape by a magnetic material, and the other piece 3b is fixed to the iron core 1 so that the one piece 3a is parallel to the iron core 1 to form a magnetic path.
[0023]
The armature 4 is formed of a magnetic material into a flat plate shape, and the conductive plate 5 is fixed to one surface thereof.
[0024]
The conductive plate 5 is formed in a long shape from a conductive thin plate spring material such as a copper alloy, and one side in the longitudinal direction is a movable spring portion 51, the other side is a hinge spring portion 52, and the armature 4 It has a fixing part 53 that is fixed to the head.
[0025]
Specifically, a movable contact 51a is provided at one end of the movable spring 51, and a fixed portion 53 is provided at the center of the other end of the movable spring 51 passing through the center line of the movable contact 51a. Is provided with a notch 53a extending in the longitudinal direction of the conductive plate 5 toward the movable contact 51a.
[0026]
Hinge spring portion 52 is formed by bending at the movable spring 51 the other end, that the fixing portion 53 is fixed proximal end L 1 is substantially matched positions in the root portion that is connected so as to extend the cage, i.e., the movable spring 51 and the hinge spring portion 52 constitutes one side of the longitudinal direction of the conductive plate 5 and the other side respectively fixed base end portion L 1 as a boundary line, the anchoring portion 53 and the movable spring portion 51 It is in a state of escaping from the movable spring portion 51 without being positioned between the hinge spring portion 52. The hinge spring 52, the distal end portion side that is substantially perpendicular bending forming the further backward from bending the formed bent portion 52a at the fixed base end portion L 1 is a lead-out terminal portion 52b.
[0027]
The conductive plate 5 is fixed by caulking with an oval protrusion 4a provided on one surface of the armature 4 with the fixing portion 53, and the external lead-out terminal portion 52b of the hinge spring portion 52 is connected to one side of the yoke 3. It is fixed to the outer surface of the piece 3a. At this time, the hinge spring portion 52 is fixed in a state in which the bent portion 52a is bent toward one surface of the armature 4, so that the base end portion of the armature 4 is connected to the end of the one piece 3a of the yoke 3. The movable contact 51a disposed between the opposing normally closed and normally open fixed contacts 51b and 51c is contacted with the normally closed fixed contact 51b. It also serves as a return spring for returning the pole 4 and an electric circuit for supplying contact current.
[0028]
Next, the operation will be described. First, when the coil 2 is excited, as shown in FIG. 2, the armature 4 is pivotally supported by the hinge spring portion 52 to the end portion of the one piece 3a of the yoke 3 so that the proximal end portion is pivotally supported. It is sucked and held by the iron core 1. Then, in the conductive plate 5 with the fixed portion 53 fixed to the armature 4, the movable contact 51a provided at one end of the movable spring portion 51 is separated from the normally closed fixed contact 51b and contacts the normally open fixed contact 51c. The contact contact pressure P at that time is secured when the movable spring portion 51 bends with the fixed base end L 1 as the base end, and is obtained by P = σ · bt 2 / 6l. Here, the deflection amount of sigma, the length of the movable spring 51 is l, the plate width b, a plate thickness of t, a length l is from anchoring the proximal end portion L 1 to the center of the movable contact 51a Distance. Next, when the coil 2 is de-energized, the armature 4 is released from the iron core 1 by the return spring force of the hinge spring portion 52, and the movable contact 51a returns to the original state where it contacts the normally closed fixed contact 51b.
[0029]
In such an electromagnetic relay, as described above, the long conductive plate 5 has a notch 53a between the fixed portion 53 and the movable spring portion 51 and extends in the longitudinal direction. It is not located between the movable spring part 51 and the hinge spring part 52, but is in a state of escaping from the movable spring part 51, that is, it is not necessary to be located between the movable spring part 51 and the hinge spring part 52. Since the armature 4 is fixed to the armature 4 by the part 53, the contact pressure P when the armature 4 is attracted and held by the iron core 1 and the movable contact 51a contacts the normally open fixed contact 51c is determined. The substantial length l of the movable spring portion 51 is not occupied by the space in the length direction of the fixing portion 53 that exists only for fixing, so that it becomes longer by the length of that portion, and even when it is downsized, Predetermined contact that can be held by suction without reducing the bending amount σ, plate width b, and plate thickness t of the movable spring portion 51. The contact pressure P can be obtained, and the capacity can be increased.
[0030]
Further, the conductive plate 5 can be fixed to the armature 4 only by caulking and fixing one fixing portion 53 provided at the central portion of the movable spring portion 51 passing through the center line of the movable contact 51a.
[0031]
In this embodiment, the anchoring portion 53 that is extended toward the movable contact 51a side has a notch 53a between the movable spring portion 51.
[0032]
Next, a first reference example will be described below with reference to FIG. This is different from the first embodiment only in the configuration of the conductive plate 5.
[0033]
That is, in the conductive plate 5 of the first embodiment, the fixing portion 53 is provided at one position on the center line of the movable contact 51a, whereas in the conductive plate 5 of the present reference example , the fixing portion 53 is provided with the movable contact. From two positions on both sides of the center line of 51a, which are substantially coincident with the fixed base end portion L1 that is the boundary line of the movable spring portion 51 and the hinge spring portion 52, in directions opposite to each other in the longitudinal direction of the conductive plate 5, That is, one portion has a notch 53a between the movable spring 51 and the movable contact 51a, and the other has a notch 53a between the hinge spring 52 and the movable contact 51a. Are extended in opposite directions, and are respectively caulked and fixed to the armatures 4 by protrusions 4a.
[0034]
In such an electromagnetic relay, the conductive plate 5 escapes from the movable spring portion 51 and the hinge spring portion 52 without the two fixing portions 53 being positioned between the movable spring portion 51 and the hinge spring portion 52, respectively. As in the first embodiment, the substantial length l of the movable spring portion 51 that determines the contact contact pressure P of the movable contact 51a is not occupied by the fixing portion 53 in the longitudinal direction. It becomes longer by the length of the portion, and it is still possible to reduce the size and increase the capacity.
[0035]
Further, since the two fixing portions 53 are provided on both sides of the center line of the movable contact 51a, it is stronger against the armature 4 than the first embodiment provided at one position on the center line. Can stick.
[0036]
The two fixing portions 53 occupy a space in the width direction of the conductive plate 5, but substantially coincide with the fixing base end portion L 1 that is a boundary line between the movable spring portion 51 and the hinge spring portion 52. From the position, the plate widths of the movable spring part 51 and the hinge spring part 52 are required to be reduced without reducing only one of them. Can be secured.
[0037]
In either case of the first embodiment or the first reference example , when the conductive plate 5 is caulked and fixed to the armature 4, the fixing portion 53 escapes from the movable spring portion 51 or the hinge spring portion 52. In this state, the stress due to caulking is hardly transmitted to the movable spring portion 51 or the hinge spring portion 52, and the influence on the operation characteristics due to the deformation of the conductive plate 5 can be prevented.
[0038]
In the first reference example , when the plate width of either the movable spring portion 51 or the hinge spring portion 52 may be reduced, the two fixing portions 53 are in the same direction in the longitudinal direction of the conductive plate 5. It may be extended to.
[0039]
In both cases of the first embodiment and the first reference example , the fixing portion 53 is fixed to the armature 4 by caulking, but other means such as welding may be used.
[0040]
Next, a second reference example will be described below based on FIG. This is different from the first embodiment in the configuration of the conductive plate 5, and an external lead-out terminal piece 6 and a flexible electric wire 7 are added.
[0041]
That is, in the same manner as in the conventional example, the conductive plate 5 is fixed by caulking and fixing the fixing portion 53 positioned between the movable spring portion 51 and the hinge spring portion 52 to the armature 4 and the hinge spring portion 52 is led out to the outside. It is overlapped with the terminal piece 6 and fixed to the one piece 3 a of the yoke 3.
[0042]
The hinge spring portion 52 is bent to a position where the bent portion 52a is bent from the fixing portion 53 and the bent portion 52a is further bent at a substantially right angle in the opposite direction and overlapped with the external lead-out terminal piece 6. The external lead-out terminal portion as in the first embodiment does not exist on the tip side.
[0043]
The terminal portion 6a of the external lead-out terminal piece 6 replaces the external lead-out terminal portion, and the external lead-out terminal piece 6 is formed in a flat plate shape with a conductive material thicker than the conductive plate 5. In addition, the connecting portion 6b located at the portion where the plate width of the bent portion 52a of the hinge spring portion 52 is cut in substantially half in a state of being fixed to the one piece 3a of the yoke 3 is bent. Yes.
[0044]
In addition, an extended portion 51d extends in the width direction at one end of the movable spring portion 51 provided with the movable contact 51a. The extended portion 51d and the connecting portion 6b of the external lead-out terminal piece 6 are electrically connected to each other. Both ends of a braided wire (flexible wire) 7 having higher conductivity and flexibility than the plate 5 are connected to each other. At this time, the braided wire 7 is arranged in parallel with the movable spring portion 51 at a position substantially the same height as the movable contact 51a.
[0045]
In such an electromagnetic relay, most of the contact current flowing through the movable contact 51a passes from the extended portion 51d provided at one end of the movable spring portion 51 via the braided wire 7 having higher conductivity than the conductive plate 5. As a result, it flows directly to the connection portion 6b of the external lead terminal piece 6 and hardly flows into the conductive plate 5 of the movable spring portion 51 and the hinge spring portion 52 so that heat generation is suppressed. Alternatively, even if the plate thickness is reduced to reduce the size, the contact current can be increased to increase the capacity.
[0046]
In addition, since the braided wire 7 is disposed in parallel with the movable spring portion 51 at a position substantially the same height as the movable contact 51a, it is difficult for excessive stress to be applied to the movable contact 51a during operation, affecting the operation. There are few.
[0047]
In this reference example , the braided wire 7 is connected to the extending portion 51d and the connecting portion 6b. However, if the flexible wire has higher conductivity than the conductive plate 5, for example, a lead wire or the like Other than the braided wire 7 may be used.
[0048]
Next, a third reference example will be described below with reference to FIGS. In this example , instead of the flexible braided wire (flexible electric wire) 7 of the second reference example , a rigid bar-like conductive piece 8 is connected at both ends thereof to the connecting portion 6b of the external lead-out terminal piece 6. The movable spring 51 is slidably connected to the extension 51d.
[0049]
In detail, as shown in FIG. 6, the opposing plate 6c is fixed to the connection portion 6b of the external lead-out terminal piece 6, and the extended portion 51d of the movable spring portion 51 is formed as a folded piece 51e folded back in a U shape. In addition, on the opposing surfaces of the connecting portion 6b and the opposing plate 6c and on the opposing surfaces of the extending portion 51d and the folded piece 51e, there are provided small triangular pyramid-shaped small protrusions, and conductive pieces between the small protrusions. 8 is slidably held while maintaining a conductive state.
[0050]
In such an electromagnetic relay, in the same manner as in the second reference example , most of the contact current flowing through the movable contact 51a passes through the conductive piece 8 having higher conductivity than the conductive plate 5, and the external lead-out terminal piece. 6 flows directly to the conductive plate 5 of the movable spring portion 51 and the hinge spring portion 52, so that heat generation is suppressed and the size and capacity can be reduced, and the armature 4 is connected to the yoke 3. The conductive piece 8 having rigidity that operates as indicated by an arrow in the figure when supported by the hinge so as to be pivotable and released from the iron core 1 includes the connecting portion 6b of the external lead-out terminal piece 6 and the movable spring. Since both end portions connected to the extending portion 51d of the portion 51 slide, respectively, the movable spring portion 51 can be operated without applying stress.
[0051]
【The invention's effect】
According to the first aspect of the present invention, the long conductive plate has the movable spring portion and the fixed portion extending in the longitudinal direction with a notch portion between the movable spring portion and the hinge spring portion. The armature is in a state of escaping from the hinge spring, that is, the armature is fixed to the armature by a fixing portion that does not need to be positioned between the movable spring portion and the hinge spring portion. The substantial length of the movable spring portion that determines the contact contact pressure when the movable contact that is held and provided at one end of the movable spring portion abuts against the fixed contact is longer than the fixed portion that exists only for fixation. Since the space in the vertical direction is not occupied, the length is increased by the length of the portion, and even when the size is reduced, the movable spring portion can be held with a suction force without reducing the bending amount, plate width, and plate thickness. Contact pressure can be obtained, and high capacity can be achieved.
[0052]
Further, in addition to the effect of the first aspect, the conductive plate can be fixed to the armature by only one fixed portion provided on the center line of the movable contact.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a first embodiment of the present invention.
FIG. 2 is a front view showing the operating state of the above.
FIG. 3 is a perspective view showing a first reference example of the present invention.
FIG. 4 is a perspective view showing a second reference example of the present invention.
FIG. 5 is a perspective view showing a third reference example of the present invention.
FIG. 6 is a partial cross-sectional view showing the main part of the above.
FIG. 7 is a perspective view showing a conventional example.
FIG. 8 is a front view showing the operating state of the above.
[Explanation of symbols]
1 Iron core
2 coils
3 yoke
4 Armature
5 Conductive plate
51 Movable spring
51a Movable contact
51b Normally closed contact
51c Normally open side fixed contact
52 Hinge spring
53 Adhering part
53a Notch
6 External lead-out terminal piece
7 Flexible wire
8 Conductive strip

Claims (2)

鉄芯と、鉄芯に巻回されたコイルと、鉄芯に固定されて磁路を形成する継鉄と、継鉄へ回動自在にヒンジ支持されて鉄芯に吸引される接極子と、固着部でもって接極子に固着されるとともに長手方向の一端部に設けた可動接点が固定接点に接触圧を持って当接するよう撓み得る可動ばね部及び接極子をヒンジ支持するよう付勢して継鉄に固定されるヒンジばね部を有する長尺状の導電板と、を備えた電磁リレーにおいて、
前記導電板は、その長手方向の一方側が可動ばね部で、他方側がヒンジばね部となり、かつ、接極子に固着される固着部を有して構成され、固着部が接極子に設けた楕円状の突起で固着され、
前記可動ばね部の他端部には、固着部が可動ばね部との間に切欠部を有して導電板の長手方向であって可動接点側へ向かって延設され、
前記ヒンジばね部は、固着部が延設されて繋がっている根元部分である固着基端部にて折曲して形成されており、可動ばね部及びヒンジばね部は固着基端部を境界線として導電板の長手方向の一方側及び他方側をそれぞれ構成されてなることを特徴とする電磁リレー。
An iron core, a coil wound around the iron core, a yoke that is fixed to the iron core to form a magnetic path, an armature that is hinged to the yoke and is pivotally supported by the iron core, and is attracted to the iron core; The movable spring fixed to the armature with the fixed portion and the movable contact provided at one end in the longitudinal direction can be bent so as to come into contact with the fixed contact with contact pressure. In an electromagnetic relay comprising a long conductive plate having a hinge spring portion fixed to a yoke,
The conductive plate has an elliptical shape in which one side in the longitudinal direction is a movable spring portion, the other side is a hinge spring portion, and has a fixing portion fixed to the armature, and the fixing portion is provided on the armature. Fixed with protrusions of
At the other end of the movable spring portion, the fixing portion has a notch between the movable spring portion and extends in the longitudinal direction of the conductive plate toward the movable contact side,
The hinge spring portion is formed by bending at a fixed base end portion, which is a root portion to which a fixed portion is extended and connected, and the movable spring portion and the hinge spring portion have a boundary line at the fixed base end portion. An electromagnetic relay characterized in that one side and the other side in the longitudinal direction of the conductive plate are respectively configured.
前記固着部は、前記可動接点の中心線上に延設されてなることを特徴とする請求項1記載の電磁リレー。  The electromagnetic relay according to claim 1, wherein the fixed portion is extended on a center line of the movable contact.
JP03545995A 1995-02-23 1995-02-23 Electromagnetic relay Expired - Fee Related JP3806946B2 (en)

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JP3806946B2 true JP3806946B2 (en) 2006-08-09

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DE102008039705B4 (en) * 2008-08-26 2018-05-30 Te Connectivity Germany Gmbh Contact assembly for a relay, relay with contact assembly and method for mounting a relay
CN109273325A (en) * 2017-07-18 2019-01-25 松川精密股份有限公司 Relay

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