JP4303413B2

JP4303413B2 - Terminal equipment

Info

Publication number: JP4303413B2
Application number: JP2000348768A
Authority: JP
Inventors: 克哉今井; 直樹金本; 正浩忽那; 安弘住野; 博之立石; 広明相星; 弘稲垣; 篤司伊藤; 辰也高木; 健鈴木
Original assignee: Panasonic Corp; Matsushita Electric Works Ltd
Current assignee: Panasonic Corp; Panasonic Electric Works Co Ltd
Priority date: 2000-11-15
Filing date: 2000-11-15
Publication date: 2009-07-29
Anticipated expiration: 2020-11-15
Also published as: JP2002151172A

Description

【０００１】
【発明の属する技術分野】
本発明は、端子装置に関するものである。
【０００２】
【従来の技術】
従来より、スイッチやコンセント等の配線器具への電線の結線を容易にしたり、接続の均一化を行って接続信頼性を確保する等の目的で、ねじによらずに結線可能な所謂速結構造の端子装置が提供されている。
【０００３】
図１４は従来の端子装置を用いた配線器具の側面断面図を示している。前面が開口した略箱状の合成樹脂製のボディ１と、ボディ１の前面に被着される合成樹脂製のカバー２とで配線器具の器体が構成されている。ボディ１の内部は隔壁によって複数の区画に区切られており、端子装置６’を収納する端子収納室９が両側に設けられている。端子収納室９にはそれぞれ導電材料から形成された端子板１１が収納されている。端子板１１は略コ字状に形成されたコ字状部１３を有しており、コ字状部１３にはそれぞれ一対の錠ばね１５’が収納されて端子装置６’が構成してある。また、ボディ１の底面には各端子収納室９に連通する電線挿入孔１６が設けられている。
【０００４】
錠ばね１５’の鎖錠片１５ｂ’および押圧片１５ｃ’は、弾性を有する導電材料の帯板の両端部を曲成して中央片１５ａ’の両端部に形成される。また、端子板１１のコ字状部１３は、それぞれ、中央片１３ａと、中央片１３ａの両端縁から中央片１３ａと略直交する方向にそれぞれ突出する当接片１３ｂおよび接触片１３ｃから構成される。錠ばね１５’の中央片１５ａ’は、端子板１１の当接片１３ｂに当接し、鎖錠片１５ｂ’は中央片１５ａ’との連結部位から先端縁に向かってコ字状部１３の接触片１３ｃに近付く向きに傾斜し、押圧片１５ｃ’は略Ｓ字状に曲成されており、錠ばね１５’に設けた鎖錠片１５ｂ’および押圧片１５ｃ’がコ字状部１３の接触片１３ｃと対向する。
【０００５】
端子装置６’に電線を接続する場合には、図１４に示すように電線１００の被覆が剥かれた芯線１０１を電線挿入孔１６から挿入すると、錠ばね１５’のばね力により錠ばね１５’の鎖錠片１５ｂ’及び押圧片１５ｃ’と、端子板１１の接触片１３ｃとの間に芯線１０１が挟持され、鎖錠片１５ｂ’の先端縁が芯線１０１に食い込むことによって、芯線１０１が反挿入方向に抜け止めされるようになっている。したがって、電線挿入孔１６に電線１００の芯線１０１を挿入するだけで、電線１００の芯線１０１が保持されるとともに、端子板１１への電気的接続がなされるのである。また各端子収納室９内には、一対の錠ばね１５’の鎖錠片１５ｂ’と対向させて解除釦１７’が収納されている。端子装置６’に接続された電線１００の芯線１０１を外す場合は、ボディ１の底面に穿設された工具挿入孔からマイナスドライバなどの工具を挿入して、解除釦１７’を押圧することにより、解除釦１７’の突起１７ａ’が鎖錠片１５ｂ’を押圧して、鎖錠片１５ｂ’を端子板１１の接触片１３ｃから離れる向きに撓ませるので、鎖錠片１５ｂ’が芯線１０１から離れ、芯線１０１を容易に引き抜くことができる。
【０００６】
【発明が解決しようとする課題】
ところが、上記従来の端子装置６’においては、錠ばね１５’の押圧片１５ｃ’が中央片１５ａ’との連結部位よりも先端部側へ行くほど中央片１５ａ’との間隔が広くなるように曲成されていた。すなわち、図２（ａ）に示すように押圧片１５ｃ’の中央片１５ａ’に対向する方向への曲げ部Ｘ、および中央片１５ａ’から離れる方向への曲げ部Ｙと中央片１５ａ’との各間隔Ａ，ＢがＡ＜Ｂの関係となっていたため、押圧片１５ｃ’を撓ませるのに大きな力が必要となり、錠ばね１５’を形成する導電材料の強度の関係から適用電線の範囲（接続可能な芯線１０１の直径の範囲）が狭くなっていた。また、押圧片１５ｃ’を撓ませるのに必要な力が大きいために撚り線からなる芯線を挿入しても押圧片１５ｃ’が撓まずに芯線がばらけてしまい、撚り線を結線することができなかった。
【０００７】
本発明は上記事情に鑑みて為されたものであり、その目的とするところは、適用電線の範囲を拡大できるとともに撚り線の結線も可能な端子装置を提供することにある。
【０００８】
【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、端子板と、端子板の側方より挿入される電線の芯線を端子板に接触させるとともに芯線を反挿入方向に抜け止めする錠ばねとを備え、この錠ばねは、弾性を有する導電性の板材を曲成することにより、端子板に対向配置される中央片、中央片との連結部位から先端縁に向かって端子板に近づく向きに傾斜し先端縁が芯線に食い込んで抜け止めする鎖錠片、中央片との連結部位から端子板に向けて延出され且つ先端部が芯線を端子板の方へ押圧することにより端子板との間に芯線を弾性挟持する押圧片が形成されてなり、この押圧片が、中央片との連結部位よりも先端部側で中央片との間隔が最も狭くなるように曲成されてなる端子装置であって、芯線が鎖錠片の先端部分に接触して鎖錠片が撓んだときに当該先端部分が押圧片の先端部に当接して押圧片を撓ませるように、芯線に接触する押圧片の先端部を鎖錠片の先端縁近傍に配置してなり、操作時に鎖錠片を芯線から離す向きに撓ませる解除釦を備え、押圧片の鎖錠片と対向する部位を鎖錠片から離れる向きに湾曲させてなることを特徴とし、従来に比較して錠ばね全体の寸法増大を抑えながら押圧片の中央片との連結部位から先端部までの寸法を長くすることができる。このため、押圧片を撓ませるのに必要な力が低下するから適用電線の範囲を拡大できるとともに撚り線の結線も可能となる。しかも、鎖錠片と端子板との間に芯線を挿入すると端子板から離れる向きに撓んだ鎖錠片の先端部分が押圧片の先端部に当接して押圧片を撓ませることになる。その結果、結線時における芯線の挿入感触が良好となり、芯線の挿入不良を防ぐことができる。また、解除釦で鎖錠片を撓ませたときに鎖錠片が押圧片と干渉するのを防ぐことができ、解除釦による解除操作がし易くなる。
【０００９】
請求項２の発明は、請求項１の発明において、芯線を挿入しない状態で鎖錠片の先端縁と端子板との間に隙間が空くように錠ばねが形成されたことを特徴とし、鎖錠片の先端縁と端子板との間に隙間を空けたことで撚り線が挿入し易くなる。
【００１０】
【発明の実施の形態】
以下、本発明をスイッチに適用した実施形態について、図面を参照して詳細に説明する。但し、本発明が適用される配線器具はスイッチに限定されるものではなく、例えばコンセント等の配線器具全般に適用可能である。
【００１１】
（実施形態１）
本実施形態におけるスイッチは所謂タンブラスイッチであって、図８〜図１０に示すように前面が開口した略箱状の合成樹脂製のボディ１と、前面が略矩形状に形成されるとともに、ボディ１の前面に被着される合成樹脂製のカバー２とで構成される器体１０を備えている。ボディ１の長手方向の両側面にはそれぞれ一対の係止凸部３が突設されるとともに、カバー２の後端縁からは係止凸部３と係止離脱自在に係止する係止孔４がそれぞれ穿設された舌片５が突設されており、係止凸部３と係止孔４とを凹凸係止させることによってボディ１とカバー２とが組み立てられる。
【００１２】
ボディ１の内部は隔壁によって複数の区画に仕切られており、本発明の端子装置６を収納する端子収納室９，９が両側に設けられ、後述する片切タイプ（Ｂ接点タイプ）の接点部８を収納する接点収納室７が略中央に設けられている。
【００１３】
端子収納室９，９にはそれぞれ導電材料から形成された端子板１１，１２が収納されている。端子板１１，１２はそれぞれ略コ字状に形成されたコ字状部１３，１４を有しており、コ字状部１３，１４にはそれぞれ一対の錠ばね１５が収納されて、端子装置６が構成してある。また、ボディ１の底面には各端子収納室９に連通する電線挿入孔１６が２個づつ穿設されている。
【００１４】
接点部８は端子板１１，１２と可動接点板１９とで構成される。一方の端子板１１の中央片１３ａと当接片１３ｂとの連結部位には、端部に固定接点２１が設けられた略Ｌ字状の端子片２０が突設されており、他方の端子板１２の当接片１４ｂの端部からは、先端に可動接点板１９の揺動支点となる支点凹部２２が形成された支持片２３が突設されている。可動接点板１９は導電材料よりなる帯板で形成され、端子板１１と対向する側の面には固定接点２１と接離自在に接触する可動接点２４が設けられている。ボディ１の両側面の略中央には内方に突出するリブ３３，３３が突設されており、ボディ１の接点収納室７内に端子板１１，１２を収納した状態で可動接点板１９を接点収納室７内に納めると、可動接点板１９の下端縁が端子板１２の支点凹部２２に挿入され、可動接点板１９が支点凹部２２を中心として揺動自在に配置される。この時、可動接点板１９の両側にリブ３３，３３が配置され、ボディ１の短幅方向への可動接点板１９の移動がリブ３３，３３によって規制される。また、可動接点板１９には側方に突出する突起３７が突設されており、この突起３７がリブ３３と係止することにより、可動接点板１９の揺動範囲が規制される。
【００１５】
一方、カバー２は前面に略矩形状の開口２５が形成され、開口２５の長手方向略中央の開口縁には前方に突出する軸受け台２６が突設されており、各軸受け台２６の互いに対向する面には溝２７が形成されている。また、カバー２の短幅方向の両側面には、カバー２の前面よりも一段高くなった段部２８，２８が形成され、各段部２８にはそれぞれ側方に突出する一対の係止爪２９が突設されている。なお、この係止爪２９を図示しない取付枠又はプレート枠の係止部に係止することで器体１０が取付枠又はプレート枠に取り付けられ、壁面などの施工面にスイッチが配設されるものである。
【００１６】
接点部８の開閉操作を行うための合成樹脂製の反転ハンドル３０は背面が開口した略箱状であって、前面が略矩形状に形成されており、長手方向の両側面にはカバー２の溝２７に入り込む突起３１がそれぞれ突設されている。また、反転ハンドル３０前面の長手方向における一端側には開口３４が穿設され、開口３４の両側には側方に突出する爪３５，３５が突設され、反転ハンドル３０前面の長手方向における他端側略中央には側方に突出する爪３６が突設されている。また、カバー２前面の裏側にはコイルばね３２が納められる棒状突起（図示せず）が設けられている。
【００１７】
反転ハンドル３０の前面側には合成樹脂製の操作ハンドル３８が着脱自在に取り付けられる。操作ハンドル３８は、反転ハンドル３０の前面を覆う矩形状の主部と主部の周縁から全周にわたって背方に突出する側壁とを連続一体に形成した略箱型のもので、主部裏面の長手方向略中央には弾性を有する係止爪片３９，４０が突設されている。係止爪片３９，４０の先端には内方に突出する爪３９ａ，４０ａが突設され、係止爪片３９，４０の爪３９ａ，４０ａと反転ハンドル３０の爪３５，３６とを係止させることにより、操作ハンドル３８の短幅方向における中心と器体１０の短幅方向における中心とを略一致するようにして、操作ハンドル３８が反転ハンドル３０に取り付けられる。
【００１８】
ところで、本実施形態のスイッチでは、片切タイプの接点部８のオフ時に点灯してスイッチの設置位置を表示するためのネオンランプ５３を有する点灯表示部５２を反転ハンドル３０内に組み込み、反転ハンドル３０の前面に穿設された開口３４にネオンランプ５３を臨ませている。また、操作ハンドル３８の開口３４に対応する部位には、操作ハンドル３８を貫通する長孔状の孔５４が穿設されている。導光部材からなるプリズム５５は孔５４に挿通され先端が操作ハンドル３８前面から突出する先端に丸みを持たせた細長の凸部５６を有しており、操作ハンドル３８の裏面側から孔５４内に凸部５６を挿入した状態で操作ハンドル３８にかしめ固定される。而して、操作ハンドル３８を反転ハンドル３０に取り付けると、プリズム５５の入射面５７がネオンランプ５３に対向して配置される。また、プリズム５５の凸部５６の先端が操作ハンドル３８の前面から突出しているので、凸部５６により接点部８をオン操作する際に押し操作する操作ハンドル３８の位置を容易に判別することができる。
【００１９】
一方、点灯表示部５２は、合成樹脂製の回路基板５２ａにインサート成形されている端子板（図示せず）にネオンランプ５３及び抵抗Ｒの一端を電気的に接続して成り、回路基板５２ａの略中央には圧入孔５２ｂが形成されている。そして、反転ハンドル３０内に設けられてコイルばね３２の一端部が挿入固定される棒状突起を上記圧入孔５２ｂに圧入することで回路基板５２ａが棒状突起に固定され反転ハンドル３０内に納装される。このとき、ネオンランプ５３及び抵抗Ｒは反転ハンドル３０内の棒状突起周囲のスペースに収納される。
【００２０】
回路基板５２ａの長手方向一端側（端子板１１に対向する側）からは、回路基板５２ａにインサート成形される端子板と一体に形成され、端子板１１の上面部と接離自在に接触導通する端子片５２ｃが突出させてある。この端子片５２ｃの下面には接点（図示せず）が形成してある。また、抵抗Ｒの一方の端子Ｒａが棒状突起の側面に設けた縦溝を通して棒状突起内に挿入され、棒状突起の内部において抵抗Ｒの端子Ｒａとコイルばね３２とを接触導通させている。
【００２１】
而して、可動接点板１９の可動接点２４が端子板１１の固定接点２１と開離（すなわち、接点部８がオフ）するように操作ハンドル３８を操作した場合には、回路基板５２ａの端部から突出する端子片５２ｃの下面に形成された接点が端子板１１の上面部に接触導通し、可動接点板１９と接触導通しているコイルばね３２を介してネオンランプ５３並びに抵抗Ｒに電源が供給されてネオンランプ５３が点灯し、ネオンランプ５３の発光がプリズム５５の入射面５７に入射し、プリズム５５内で屈折されて凸部５６から外部に出射され、接点部８のオフ時にスイッチの位置を表示することができる。
【００２２】
一方、可動接点板１９の可動接点２４が端子板１１の固定接点２１と接触（すなわち、接点部８がオン）するように操作ハンドル３８を操作した場合には、図９に示すように回路基板５２ａの端子片５２ｃが端子板１１の上面部から開離するので、ネオンランプ５３が消灯する。
【００２３】
次に、端子板１１，１２のコ字状部１３，１４、錠ばね１５及び解除釦１７から構成される端子装置６について説明する。錠ばね１５の鎖錠片１５ｂおよび押圧片１５ｃは、図２（ｂ）に示すように弾性を有する導電材料の帯板の両端部を曲成して中央片１５ａの両端部に形成される。また、図１に示すように端子板１１，１２のコ字状部１３，１４は、それぞれ、中央片１３ａ，１４ａと、中央片１３ａ，１４ａの両端縁から中央片１３ａ，１４ａと略直交する方向にそれぞれ突出する当接片１３ｂ，１４ｂおよび接触片１３ｃ，１４ｃから構成される。錠ばね１５の中央片１５ａは、端子板１１，１２の当接片１３ｂ，１４ｂに当接し、鎖錠片１５ｂは中央片１５ａとの連結部位から先端縁に向かってコ字状部１３，１４の接触片１３ｃ，１４ｃに近付く向きに傾斜している。また、押圧片１５ｃは略Ｓ字状に曲成されており、錠ばね１５に設けた鎖錠片１５ｂおよび押圧片１５ｃがコ字状部１３，１４の接触片１３ｃ，１４ｃと対向する。
【００２４】
ここで、本実施形態においては、錠ばね１５の押圧片１５ｃが、中央片１５ａとの連結部位よりも先端部側で中央片１５ａとの間隔が最も狭くなるように曲成されている。すなわち、図２（ｂ）に示すように押圧片１５ｃの中央片１５ａに対向する方向への曲げ部Ｘ、および中央片１５ａから離れる方向への曲げ部Ｙと中央片１５ａとの各間隔Ａ，ＢをＡ＞Ｂの関係としているため、従来に比較して錠ばね１５全体の寸法増大を抑えながら、押圧片１５ｃの中央片１５ａとの連結部位から先端部までの寸法を長くすることができ、押圧片１５ｃを撓ませるのに必要な力を低下させ、且つ押圧片１５ｃへの応力集中を分散させることができる。その結果、図２（ａ）に示す従来例に比較して適用電線の範囲を拡大できるとともに撚り線の結線も可能になる。なお、押圧片１５ｃの寸法が長くなったことに伴って鎖錠片１５ｂの寸法も長くなっており、従来例に比較して鎖錠片１５ｂも撓み易くなっている。
【００２５】
而して、端子装置６に電線１００を接続する場合には、図１に示すように電線１００の被覆が剥かれた芯線１０１を電線挿入孔１６から挿入すると、錠ばね１５のばね力により錠ばね１５の鎖錠片１５ｂ及び押圧片１５ｃと、端子板１１，１２の接触片１３ｃ，１４ｃとの間に芯線１０１が挟持され、鎖錠片１５ｂの先端縁が芯線１０１に食い込むことによって、芯線１０１が反挿入方向に抜け止めされる。なお、電線挿入孔１６は奥方ほど細くなるように形成されており、電線挿入孔１６からボディ１内に挿入された電線１００の芯線１０１が端子板１１，１２と錠ばね１５との間に確実に挿入されるようになっている。
【００２６】
また各端子収納室９内には、一対の錠ばね１５の鎖錠片１５ｂと対向させて解除釦１７が収納されている。端子装置６に接続された電線１００の芯線１０１を外す場合は、ボディ１の底面に穿設された工具挿入孔１８からマイナスドライバなどの工具を挿入して、解除釦１７を押圧することにより、解除釦１７の突起１７ａが鎖錠片１５ｂを押圧して、鎖錠片１５ｂを端子板１１，１２の接触片１３ｃ，１４ｃから離れる向きに撓ませるので、鎖錠片１５ｂが芯線１０１から離れ、電線１００を容易に引き抜くことができる。なお、解除釦１７は両側に突起１７ａを有しているので、解除釦１７を操作することによって一対の錠ばね１５の鎖錠片１５ｂを同時に撓ませて、一対の錠ばね１５と芯線１０１との係止状態を同時に解除して、芯線１０１を一度に外すことができる。
【００２７】
ところで、従来例においては、図３（ａ）に示すように錠ばね１５’の鎖錠片１５ｂ’の先端縁と押圧片１５ｃ’の先端部との間隔が大きいために、芯線１０１の挿入時に最初に鎖錠片１５ｂ’の先端縁を乗り越える際の抵抗があり、その後に押圧片１５ｃ’の先端部に接触して押圧片１５ｃ’を撓ませる際の抵抗があった。このため、図４（ａ）に示すように芯線１０１の挿入力に２つのピークが生じ、電線１００の結線時における芯線１０１の挿入感触が良くないものであった。これに対して本実施形態では、芯線１０１に接触する押圧片１５ｃの先端部を鎖錠片１５ｂの先端縁近傍に配置しているので、鎖錠片１５ｂと端子板１１，１２の接触片１３ｃ，１４ｃとの間に芯線１０１を挿入すると、図３（ｂ）に示すように接触片１３ｃ，１４ｃから離れる向きに撓んだ鎖錠片１５ｂの先端部分が押圧片１５ｃの先端部に当接して押圧片１５ｃを撓ませることとなる。このため、図４（ｂ）に示すように芯線１０１の挿入力に１つのピークしか生じず、電線１００の結線時における芯線１０１の挿入感触が良好となり、芯線１０１の挿入不良を防ぐことができる。
【００２８】
また、上述のように芯線１０１に接触する押圧片１５ｃの先端部を鎖錠片１５ｂの先端縁近傍に配置した場合、解除釦１８を操作して鎖錠片１５ｂを撓ませる際に鎖錠片１５ｂと押圧片１５ｃとが干渉すると解除作業がし難くなってしまう。そこで本実施形態においては、図５に示すように押圧片１５ｃの鎖錠片１５ｂと対向する部位Ｚを鎖錠片１５ｂから離れる向きに湾曲させており、これにより、解除釦１７で鎖錠片１５ｂを撓ませたときに鎖錠片１５ｂが押圧片１５ｃと干渉するのを防ぐことができ、解除釦１７による解除操作がし易くなるという利点がある。
【００２９】
さらに、本実施形態においては、図６に示すように芯線１０１を挿入しない状態で鎖錠片１５ｂの先端縁と端子板１１，１２の接触片１３ｃ，１４ｃとの間に隙間が空くように錠ばね１５が形成されている。すなわち、端子板１１，１２のコ字状部１３，１４における当接片１３ｃ，１４ｃと接触片１３ｃ，１４ｃとの間隔Ｌ１に対して、錠ばね１５における中央片１５ａと鎖錠片１５ｂの先端縁との間隔Ｌ２が狭くしてある（Ｌ１＞Ｌ２）。このように鎖錠片１５ｂの先端縁と端子板１１，１２の接触片１３ｃ，１４ｃとの間に隙間を空けたことで撚り線からなる芯線が挿入し易くなるという利点がある。
【００３０】
ところで、芯線１０１の径によっては鎖錠片１５ｂと端子板１１，１２の接触片１３ｃ，１４ｃとの間に芯線１０１を挿入する際に錠ばね１５が回転して芯線１０１の保持を安定させることができない虞がある。そこで、本実施形態においては、図７に示すように芯線１０１に接触する押圧片１５ｃの先端部に芯線１０１に接触する向きに突出する複数のアールＲが付けられている。このため、芯線１０１の径に応じて芯線１０１と押圧片１５ｃとの接触位置が変わるから、錠ばね１５の回転を防止して芯線１０１の保持を安定させることができる。
【００３１】
（実施形態２）
実施形態１では片切タイプの接点部８を備えたスイッチに本発明を適用しているが、本実施形態では３路タイプ（Ｃ接点タイプ）の接点部８を備えたスイッチに本発明を適用している。このスイッチの分解斜視図を図１１に、正面図を図１２（ａ）に、側面図を図１２（ｂ）に、下面図を図１２（ｃ）に、断面図を図１３にそれぞれ示す。なお、実施形態１のスイッチと同一の構成要素には同一の符号を付して、その説明を省略する。
【００３２】
接点部８は実施形態１と同じ構造の端子板１２（以下、「第１の端子板」と呼ぶ）と可動接点板１９と一対の第２の端子板５８，６０とで構成される。なお、可動接点板１９には表裏両面に後述する固定接点５９，６１とそれぞれ接離自在に接触する可動接点２４ａ，２４ｂが設けられている。
【００３３】
第２の端子板５８，６０は導電性材料からなる板材を曲成することにより、第１の端子板１２と同様に略コ字状に形成されたコ字状部を有しており、このコ字状部に一対の錠ばね１５が配置されて、端子装置６を構成する。第２の端子板５８，６０のコ字状部は中央片５８ａ，６０ａと、中央片５８ａ，６０ａの両端縁から中央片５８ａ，６０ａと略直交する方向にそれぞれ突出する接触片５８ｂ，６０ｂおよび当接片５８ｃ，６０ｃから構成される。また、第２の端子板５８，６０と一対の錠ばね１５とで端子装置６が構成される。ここで、一方の第２の端子板５８の中央片５８ａからは可動接点板１９の一方の可動接点２４ａと接離自在に接触する固定接点５９が先端に設けられた略Ｌ字状の端子片５８ｃが延設されている。さらに、他方の第２の端子板６０の中央片６０ａからは可動接点板１９の他方の可動接点２４ｂと接離自在に接触する固定接点６１が先端に設けられた略Ｌ字状の端子片６０ｄが延設されている。そして、第２の端子板５８，６０の中央片５８ａ，６０ａの各上面部には、それぞれ弾性を有する接触子６３，６４が取着される。
【００３４】
接触子６３，６４は互いに鏡像の関係にあり、第２の端子板５８，６０の中央片５８ａ、６０ａに接触導通する平板状の主片６３ａ，６４ａと、主片６３ａ，６４ａの一端部から延出して回路基板５２ｄの接触部（図示せず）に接触導通する略へ字状の接触片６３ｂ，６４ｂと、主片６３ａ，６４ａにおける接触片６３ｂ，６４ｂと隣り合う両端縁に折曲形成された一対の側片６３ｃ，６３ｄ、６４ｃ，６４ｄとが導電性を有する板材によって一体に形成されている。一方の側片６３ｃ，６４ｃの先端縁からは第２の端子板５８，６０の中央片５８ａ，６０ａに係止する係止片が内側に折曲形成され、他方の側片６３ｄ，６４ｄには内側に向けて突出する係止爪が切り起こし形成されている。
【００３５】
而して、接触子６３，６４の側片６３ｃ，６４ｃに設けた係止片を第２の端子板５８，６０の中央片５８ａ、６０ａの端部に係止した後、他方の側片６３ｄ，６４ｄを中央片５８ａ，６０ａの方へ押し付けるようにすれば、側片６３ｄ，６４ｄに設けた係止爪が中央片５８ａ、６０ａの端縁に当接して撓められ、やがて係止爪の先端が中央片５８ａ，６０ａの端縁を乗り越えると、係止爪が中央片５８ａ，６０ａの端部に係止し、接触子６３，６４が第２の端子板５８，６０に取着され且つ係止固定される。
【００３６】
ここで、カバー２の内周面に複数の押さえリブ（図示せず）が突設してあり、ボディ１とカバー２を組み立てて器体１０を構成した場合に、上記押さえリブが回路基板５２ｄの周縁部に当接して回路基板５２ｄをボディ１側へ押さえつけるようになっている。その結果、回路基板５２ｄの接触部と各接触子６３，６４の接触片６３ｂ，６４ｂとが弾接して、第２の端子板５８，６０と回路基板５２ｄとが電気的に接続されており、負荷のオフ時に接触子６３，６４を介して点灯表示部５２に給電されて、ネオンランプ５３が点灯することになる。
【００３７】
而して、本実施形態のスイッチでは、操作ハンドル３８を操作する毎に可動接点２４ａと固定接点５９、可動接点２４ｂと固定接点６１が択一的に接触・開離し、負荷（例えば、照明負荷）に通電されていないときにネオンランプ５３が点灯し、負荷に通電されているときにはネオンランプ５３が消灯する。
【００３８】
なお、本発明の端子装置が適用されるスイッチは、接点部８が上述の片切タイプや３路タイプのものに限定されるものではなく、両切タイプ（Ｄ接点タイプ）や４路タイプ（Ｅ接点タイプ）のものであっても良い。また、位置表示用のネオンランプ５３を備えていてもいなくても何れでも良い。
【００３９】
【発明の効果】
請求項１の発明は、端子板と、端子板の側方より挿入される電線の芯線を端子板に接触させるとともに芯線を反挿入方向に抜け止めする錠ばねとを備え、この錠ばねは、弾性を有する導電性の板材を曲成することにより、端子板に対向配置される中央片、中央片との連結部位から先端縁に向かって端子板に近づく向きに傾斜し先端縁が芯線に食い込んで抜け止めする鎖錠片、中央片との連結部位から端子板に向けて延出され且つ先端部が芯線を端子板の方へ押圧することにより端子板との間に芯線を弾性挟持する押圧片が形成されてなり、この押圧片が、中央片との連結部位よりも先端部側で中央片との間隔が最も狭くなるように曲成されてなる端子装置であって、芯線が鎖錠片の先端部分に接触して鎖錠片が撓んだときに当該先端部分が押圧片の先端部に当接して押圧片を撓ませるように、芯線に接触する押圧片の先端部を鎖錠片の先端縁近傍に配置してなり、操作時に鎖錠片を芯線から離す向きに撓ませる解除釦を備え、押圧片の鎖錠片と対向する部位を鎖錠片から離れる向きに湾曲させてなるので、従来に比較して錠ばね全体の寸法増大を抑えながら押圧片の中央片との連結部位から先端部までの寸法を長くすることができ、押圧片を撓ませるのに必要な力が低下するから適用電線の範囲を拡大できるとともに撚り線の結線も可能になり、しかも、鎖錠片と端子板との間に芯線を挿入すると端子板から離れる向きに撓んだ鎖錠片の先端部分が押圧片の先端部に当接して押圧片を撓ませ、結線時における芯線の挿入感触が良好となり、芯線の挿入不良を防ぐことができ、さらに、解除釦で鎖錠片を撓ませたときに鎖錠片が押圧片と干渉するのを防ぐことができ、解除釦による解除操作がし易くなるという効果がある。
【００４０】
請求項２の発明は、請求項１の発明において、芯線を挿入しない状態で鎖錠片の先端縁と端子板との間に隙間が空くように錠ばねが形成されたので、鎖錠片の先端縁と端子板との間に隙間を空けたことで撚り線が挿入し易くなるという効果がある。
【図面の簡単な説明】
【図１】実施形態１を示すスイッチの要部断面図である。
【図２】（ａ）は従来の錠ばねを示す平面図、（ｂ）は実施形態１の錠ばねを示す平面図である。
【図３】（ａ）は従来の端子装置を示す側面図、（ｂ）は実施形態１の端子装置を示す側断面図である。
【図４】（ａ）は従来例の動作説明図、（ｂ）は実施形態１の動作説明図である。
【図５】同上の説明図である。
【図６】同上の説明図である。
【図７】（ａ）は同上における錠ばねの平面図、（ｂ）は錠ばねの押圧片の先端部を示す平面図である。
【図８】同上におけるスイッチの分解斜視図である。
【図９】同上におけるスイッチの断面図である。
【図１０】（ａ）は同上におけるスイッチの正面図、（ｂ）は同上におけるスイッチの側面図、（ｃ）は同上におけるスイッチの下面図である。
【図１１】実施形態２におけるスイッチの分解斜視図である。
【図１２】同上におけるスイッチの断面図である。
【図１３】（ａ）は同上におけるスイッチの正面図、（ｂ）は同上におけるスイッチの側面図、（ｃ）は同上におけるスイッチの下面図である。
【図１４】従来例を示す配線器具の要部断面図である。
【符号の説明】
１１，１２端子板
１３，１４コ字状部
１３ｃ，１４ｃ接触片
１５錠ばね
１５ａ中央片
１５ｂ鎖錠片
１５ｃ押圧片
１００電線
１０１芯線[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a terminal device.
[0002]
[Prior art]
Conventionally, a so-called fast connection structure that can be connected without using screws for the purpose of facilitating the connection of wires to wiring devices such as switches and outlets, and ensuring connection reliability by making the connection uniform. A terminal device is provided.
[0003]
FIG. 14 shows a side sectional view of a wiring device using a conventional terminal device. The body of the wiring device is composed of a substantially box-shaped synthetic resin body 1 having an open front surface and a synthetic resin cover 2 attached to the front surface of the body 1. The inside of the body 1 is divided into a plurality of sections by partition walls, and terminal storage chambers 9 for storing the terminal device 6 'are provided on both sides. Each terminal storage chamber 9 stores a terminal plate 11 made of a conductive material. The terminal plate 11 has a U-shaped portion 13 formed in a substantially U-shape, and a pair of lock springs 15 ′ are accommodated in the U-shaped portion 13 to constitute a terminal device 6 ′. . In addition, an electric wire insertion hole 16 communicating with each terminal storage chamber 9 is provided on the bottom surface of the body 1.
[0004]
The locking pieces 15b 'and the pressing pieces 15c' of the lock spring 15 'are formed at both ends of the central piece 15a' by bending both ends of a strip of conductive material having elasticity. The U-shaped portion 13 of the terminal board 11 includes a center piece 13a, and a contact piece 13b and a contact piece 13c that protrude from both end edges of the center piece 13a in a direction substantially orthogonal to the center piece 13a, respectively. The The central piece 15a ′ of the lock spring 15 ′ is in contact with the contact piece 13b of the terminal plate 11, and the locking piece 15b ′ is in contact with the U-shaped portion 13 from the connecting portion with the central piece 15a ′ toward the leading edge. The pressing piece 15 c ′ is inclined in a substantially S shape so as to approach the piece 13 c, and the locking piece 15 b ′ and the pressing piece 15 c ′ provided on the lock spring 15 ′ are in contact with the U-shaped portion 13. Opposite the piece 13c.
[0005]
When connecting the electric wire to the terminal device 6 ', when the core wire 101 with the coating of the electric wire 100 removed is inserted from the electric wire insertion hole 16 as shown in FIG. 14, the lock spring 15' is brought about by the spring force of the lock spring 15 '. The core wire 101 is sandwiched between the locking piece 15b ′ and the pressing piece 15c ′ and the contact piece 13c of the terminal plate 11, and the leading edge of the locking piece 15b ′ bites into the core wire 101. It is designed to be secured in the insertion direction. Therefore, only by inserting the core wire 101 of the electric wire 100 into the electric wire insertion hole 16, the core wire 101 of the electric wire 100 is held and the electrical connection to the terminal plate 11 is made. Also, in each terminal storage chamber 9, a release button 17 'is stored facing the lock piece 15b' of the pair of lock springs 15 '. When removing the core wire 101 of the electric wire 100 connected to the terminal device 6 ′, a tool such as a flat-blade screwdriver is inserted through a tool insertion hole formed in the bottom surface of the body 1 and the release button 17 ′ is pressed. The protrusion 17 a ′ of the release button 17 ′ presses the locking piece 15 b ′ and bends the locking piece 15 b ′ away from the contact piece 13 c of the terminal plate 11, so that the locking piece 15 b ′ is separated from the core wire 101. The core wire 101 can be easily pulled out.
[0006]
[Problems to be solved by the invention]
However, in the above-described conventional terminal device 6 ′, the interval between the pressing piece 15c ′ of the lock spring 15 ′ and the central piece 15a ′ becomes wider as it goes to the distal end side than the connecting portion with the central piece 15a ′. It was composed. That is, as shown in FIG. 2A, the bending portion X in the direction facing the central piece 15a ′ of the pressing piece 15c ′, and the bending portion Y in the direction away from the central piece 15a ′ and the central piece 15a ′. Since the distances A and B are in a relationship of A <B, a large force is required to bend the pressing piece 15c ′, and the range of the applicable electric wire (from the relationship of the strength of the conductive material forming the lock spring 15 ′ ( The diameter range of the connectable core wire 101 was narrow. Further, since the force necessary to bend the pressing piece 15c ′ is large, even if a core wire made of a stranded wire is inserted, the pressing piece 15c ′ does not bend and the core wire is scattered, and the stranded wire may be connected. could not.
[0007]
This invention is made | formed in view of the said situation, The place made into the objective is providing the terminal device which can expand the range of an applicable electric wire and can also connect the strand wire.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, a first aspect of the present invention provides a terminal plate and a lock spring for bringing the core wire of the electric wire inserted from the side of the terminal plate into contact with the terminal plate and preventing the core wire from coming off in the anti-insertion direction. The lock spring is formed by bending an elastic conductive plate material so as to approach the terminal plate from the connecting portion with the central piece toward the tip edge. Locking piece that tilts and the leading edge bites into the core wire to prevent it from coming out, extends from the connecting part with the central piece toward the terminal plate, and the tip portion presses the core wire toward the terminal plate to A terminal device in which a pressing piece for elastically holding the core wire is formed therebetween , and this pressing piece is bent so that the distance from the central piece is the narrowest at the tip side than the connecting portion with the central piece. The core wire contacts the tip of the lock piece and the lock piece is bent. As the tip portion to deflect the pressing piece abuts on the tip portion of the pressing piece when it becomes to place the tip portion of the pressing piece in contact with the core wire to the distal edge near the locking piece, the chain during operation It has a release button that bends the lock piece in the direction away from the core wire, and the part facing the lock piece of the pressing piece is curved in the direction away from the lock piece , and the lock spring as a whole compared to the conventional While suppressing the increase in size, the dimension from the connecting portion with the center piece of the pressing piece to the tip can be increased. For this reason, since the force required to bend the pressing piece is reduced, the range of the applied electric wire can be expanded and a twisted wire can be connected. In addition, when the core wire is inserted between the locking piece and the terminal plate, the distal end portion of the locking piece that is bent away from the terminal plate comes into contact with the distal end portion of the pressing piece to bend the pressing piece. As a result, the insertion feeling of the core wire at the time of connection becomes good, and the insertion failure of the core wire can be prevented. Further, when the lock piece is bent by the release button, the lock piece can be prevented from interfering with the pressing piece, and the release operation by the release button is facilitated.
[0009]
The invention of claim 2 is characterized in that, in the invention of claim 1 , a lock spring is formed so that a gap is left between the tip edge of the lock piece and the terminal plate without inserting the core wire. It becomes easy to insert a stranded wire by leaving a gap between the tip edge of the lock piece and the terminal plate .
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments in which the present invention is applied to a switch will be described in detail with reference to the drawings. However, the wiring apparatus to which the present invention is applied is not limited to a switch, and can be applied to general wiring apparatuses such as an outlet.
[0011]
(Embodiment 1)
The switch in the present embodiment is a so-called tumbler switch, and as shown in FIGS. 8 to 10, a body 1 made of a substantially box-shaped synthetic resin having an open front surface, a front surface formed in a substantially rectangular shape, and a body 1 is provided with a cover 10 made of a synthetic resin cover 2 to be attached to the front surface of 1. A pair of locking projections 3 are provided on both side surfaces of the body 1 in the longitudinal direction, and locking holes are provided in the rear end edge of the cover 2 so as to be locked with the locking projections 3 in a freely detachable manner. Tongue pieces 5 each having holes 4 are protruded, and the body 1 and the cover 2 are assembled by engaging the engaging protrusion 3 and the engaging hole 4 in a concavo-convex manner.
[0012]
The inside of the body 1 is partitioned into a plurality of sections by partition walls, and terminal storage chambers 9 and 9 for storing the terminal device 6 of the present invention are provided on both sides, and a contact portion of a single-cut type (B contact type) described later. A contact storage chamber 7 for storing 8 is provided substantially at the center.
[0013]
Terminal plates 11 and 12 made of a conductive material are stored in the terminal storage chambers 9 and 9, respectively. Each of the terminal plates 11 and 12 has U-shaped portions 13 and 14 formed in a substantially U-shape, and a pair of lock springs 15 are accommodated in the U-shaped portions 13 and 14, respectively. 6 is configured. In addition, two wire insertion holes 16 communicating with each terminal storage chamber 9 are formed in the bottom surface of the body 1.
[0014]
The contact portion 8 includes terminal plates 11 and 12 and a movable contact plate 19. A substantially L-shaped terminal piece 20 provided with a fixed contact 21 at its end protrudes from a connection portion between the central piece 13a and the contact piece 13b of one terminal board 11, and the other terminal board. From the end portion of the twelve contact pieces 14b, a support piece 23 having a fulcrum recess 22 formed as a swing fulcrum of the movable contact plate 19 at the tip is provided. The movable contact plate 19 is formed of a strip made of a conductive material, and a movable contact 24 that comes in contact with the fixed contact 21 is provided on the surface facing the terminal plate 11. Inwardly projecting ribs 33 and 33 are provided at substantially the center of both side surfaces of the body 1, and the movable contact plate 19 is placed in a state in which the terminal plates 11 and 12 are housed in the contact housing chamber 7 of the body 1. When stored in the contact housing chamber 7, the lower end edge of the movable contact plate 19 is inserted into the fulcrum recess 22 of the terminal plate 12, and the movable contact plate 19 is disposed so as to be swingable around the fulcrum recess 22. At this time, the ribs 33 and 33 are disposed on both sides of the movable contact plate 19, and the movement of the movable contact plate 19 in the short width direction of the body 1 is restricted by the ribs 33 and 33. Further, the movable contact plate 19 is provided with a protrusion 37 projecting sideways, and the protrusion 37 is engaged with the rib 33, whereby the swing range of the movable contact plate 19 is restricted.
[0015]
On the other hand, a substantially rectangular opening 25 is formed on the front surface of the cover 2, and a bearing base 26 that protrudes forward is projected from an opening edge in the substantially longitudinal center of the opening 25, and each bearing base 26 faces each other. A groove 27 is formed on the surface to be processed. Further, on both side surfaces of the cover 2 in the short width direction, step portions 28 and 28 that are one step higher than the front surface of the cover 2 are formed, and each step portion 28 has a pair of locking claws protruding laterally. 29 is protrudingly provided. The container 10 is attached to the attachment frame or the plate frame by engaging the engagement claw 29 with the engagement portion of the attachment frame or the plate frame (not shown), and the switch is disposed on the construction surface such as the wall surface. Is.
[0016]
A synthetic resin reversing handle 30 for opening and closing the contact portion 8 has a substantially box shape with an open rear surface, and a front surface formed in a substantially rectangular shape. Protrusions 31 that enter the grooves 27 are respectively provided. Further, an opening 34 is formed on one end side in the longitudinal direction of the front surface of the reversing handle 30, and claws 35, 35 projecting sideways are projected on both sides of the opening 34. A claw 36 projecting sideways is provided at the center of the end side. Further, a bar-like protrusion (not shown) in which the coil spring 32 is accommodated is provided on the back side of the front surface of the cover 2.
[0017]
A synthetic resin operation handle 38 is detachably attached to the front side of the reversing handle 30. The operation handle 38 is a substantially box-shaped unit in which a rectangular main portion that covers the front surface of the reversing handle 30 and a side wall that projects backward from the periphery of the main portion to the back are integrally formed. Locking claw pieces 39 and 40 having elasticity protrude from the center in the longitudinal direction. Claws 39a and 40a projecting inwardly protrude from the tips of the locking claw pieces 39 and 40, and the claw 39a and 40a of the locking claw pieces 39 and 40 and the claw 35 and 36 of the reversing handle 30 are locked. As a result, the operation handle 38 is attached to the reversing handle 30 so that the center of the operation handle 38 in the short width direction and the center of the body 10 in the short width direction substantially coincide with each other.
[0018]
By the way, in the switch of the present embodiment, a lighting display unit 52 having a neon lamp 53 that is turned on when the one-sided contact portion 8 is turned off to display the installation position of the switch is incorporated in the reversing handle 30. A neon lamp 53 is exposed to an opening 34 formed in the front surface of 30. A long hole 54 that penetrates the operation handle 38 is formed in a portion corresponding to the opening 34 of the operation handle 38. The prism 55 made of a light guide member is inserted into the hole 54 and has an elongated convex portion 56 whose tip is projected from the front surface of the operation handle 38 and is rounded. It is caulked and fixed to the operation handle 38 in a state where the convex portion 56 is inserted. Thus, when the operation handle 38 is attached to the reversing handle 30, the incident surface 57 of the prism 55 is arranged to face the neon lamp 53. Further, since the tip of the convex portion 56 of the prism 55 protrudes from the front surface of the operation handle 38, it is possible to easily determine the position of the operation handle 38 that is pushed when the contact portion 8 is turned on by the convex portion 56. it can.
[0019]
On the other hand, the lighting display unit 52 is formed by electrically connecting one end of a neon lamp 53 and a resistor R to a terminal board (not shown) insert-molded on a circuit board 52a made of synthetic resin. A press-fitting hole 52b is formed substantially at the center. Then, the circuit board 52a is fixed to the rod-shaped protrusion and is accommodated in the reversing handle 30 by press-fitting a rod-shaped protrusion provided in the reversing handle 30 into which one end of the coil spring 32 is inserted and fixed into the press-fitting hole 52b. The At this time, the neon lamp 53 and the resistor R are stored in a space around the rod-shaped protrusion in the reversing handle 30.
[0020]
From one end side in the longitudinal direction of the circuit board 52a (side facing the terminal board 11), the circuit board 52a is formed integrally with a terminal board that is insert-molded on the circuit board 52a, and is in contact with and electrically connected to the upper surface portion of the terminal board 11. A terminal piece 52c is projected. A contact (not shown) is formed on the lower surface of the terminal piece 52c. Also, one terminal Ra of the resistor R is inserted into the rod-shaped protrusion through a longitudinal groove provided on the side surface of the rod-shaped protrusion, and the terminal Ra of the resistor R and the coil spring 32 are brought into contact with each other inside the rod-shaped protrusion.
[0021]
Thus, when the operation handle 38 is operated so that the movable contact 24 of the movable contact plate 19 is separated from the fixed contact 21 of the terminal plate 11 (that is, the contact portion 8 is turned off), the end of the circuit board 52a. The contact formed on the lower surface of the terminal piece 52c protruding from the contact portion is in contact with the upper surface portion of the terminal plate 11, and is supplied to the neon lamp 53 and the resistor R through the coil spring 32 in contact with the movable contact plate 19. Is supplied, the neon lamp 53 is turned on, the light emitted from the neon lamp 53 is incident on the incident surface 57 of the prism 55, is refracted in the prism 55 and emitted to the outside from the convex portion 56, and is switched when the contact portion 8 is turned off. The position of can be displayed.
[0022]
On the other hand, when the operation handle 38 is operated so that the movable contact 24 of the movable contact plate 19 contacts the fixed contact 21 of the terminal plate 11 (that is, the contact portion 8 is turned on), as shown in FIG. Since the terminal piece 52c of 52a separates from the upper surface part of the terminal board 11, the neon lamp 53 turns off.
[0023]
Next, the terminal device 6 including the U-shaped portions 13 and 14 of the terminal plates 11 and 12, the lock spring 15, and the release button 17 will be described. As shown in FIG. 2 (b), the locking piece 15b and the pressing piece 15c of the lock spring 15 are formed at both ends of the central piece 15a by bending both ends of a strip of conductive material having elasticity. Further, as shown in FIG. 1, the U-shaped portions 13 and 14 of the terminal plates 11 and 12 are substantially orthogonal to the central pieces 13a and 14a from the center pieces 13a and 14a and both end edges of the central pieces 13a and 14a, respectively. It comprises contact pieces 13b and 14b and contact pieces 13c and 14c that protrude in the direction. The central piece 15a of the lock spring 15 is in contact with the contact pieces 13b and 14b of the terminal plates 11 and 12, and the locking piece 15b is U-shaped portions 13 and 14 from the connecting portion with the central piece 15a toward the tip edge. The contact pieces 13c and 14c are inclined to approach the contact pieces 13c and 14c. Further, the pressing piece 15 c is bent in a substantially S shape, and the locking piece 15 b and the pressing piece 15 c provided on the lock spring 15 face the contact pieces 13 c and 14 c of the U-shaped portions 13 and 14.
[0024]
Here, in the present embodiment, the pressing piece 15c of the lock spring 15 is bent so that the distance from the central piece 15a is the narrowest at the tip end side of the connecting portion with the central piece 15a. That is, as shown in FIG. 2B, the bending portion X in the direction facing the central piece 15a of the pressing piece 15c, and the distance A between the bending portion Y in the direction away from the central piece 15a and the central piece 15a, Since B is in a relationship of A> B, the dimension from the connecting portion of the pressing piece 15c to the center piece 15a to the tip end portion can be increased while suppressing an increase in the overall size of the lock spring 15 compared to the conventional case. The force required to bend the pressing piece 15c can be reduced, and the stress concentration on the pressing piece 15c can be dispersed. As a result, compared to the conventional example shown in FIG. 2 (a), the range of the applied electric wire can be expanded and a twisted wire can be connected. In addition, the dimension of the locking piece 15b becomes long with the dimension of the press piece 15c becoming long, and the locking piece 15b is also easy to bend compared with a prior art example.
[0025]
Thus, when the electric wire 100 is connected to the terminal device 6, as shown in FIG. 1, when the core wire 101 from which the coating of the electric wire 100 is peeled is inserted through the electric wire insertion hole 16, the lock force is applied by the spring force of the lock spring 15. The core wire 101 is sandwiched between the locking piece 15b and the pressing piece 15c of the spring 15 and the contact pieces 13c and 14c of the terminal plates 11 and 12, and the leading edge of the locking piece 15b bites into the core wire 101. 101 is retained in the anti-insertion direction. The wire insertion hole 16 is formed so as to be thinner toward the back, and the core wire 101 of the wire 100 inserted into the body 1 from the wire insertion hole 16 is securely between the terminal plates 11, 12 and the lock spring 15. To be inserted.
[0026]
In each terminal storage chamber 9, a release button 17 is stored so as to face the lock pieces 15 b of the pair of lock springs 15. When removing the core wire 101 of the electric wire 100 connected to the terminal device 6, by inserting a tool such as a minus driver from the tool insertion hole 18 formed in the bottom surface of the body 1 and pressing the release button 17, Since the protrusion 17a of the release button 17 presses the locking piece 15b and bends the locking piece 15b away from the contact pieces 13c, 14c of the terminal plates 11, 12, the locking piece 15b is separated from the core wire 101, The electric wire 100 can be easily pulled out. Since the release button 17 has protrusions 17a on both sides, by operating the release button 17, the locking pieces 15b of the pair of lock springs 15 are bent at the same time, and the pair of lock springs 15 and the core wire 101 At the same time, the core wire 101 can be removed at once.
[0027]
By the way, in the conventional example, as shown in FIG. 3A, the distance between the leading edge of the locking piece 15b ′ of the locking spring 15 ′ and the leading end of the pressing piece 15c ′ is large. First, there was resistance when getting over the leading edge of the locking piece 15b ′, and then there was resistance when bending the pressing piece 15c ′ by contacting the tip of the pressing piece 15c ′. For this reason, as shown in FIG. 4A, two peaks occur in the insertion force of the core wire 101, and the insertion feeling of the core wire 101 when the electric wire 100 is connected is not good. On the other hand, in this embodiment, since the front end portion of the pressing piece 15c that contacts the core wire 101 is disposed in the vicinity of the front end edge of the locking piece 15b, the contact piece 13c between the locking piece 15b and the terminal plates 11 and 12 is provided. , 14c, the distal end portion of the locking piece 15b which is bent away from the contact pieces 13c, 14c comes into contact with the distal end portion of the pressing piece 15c as shown in FIG. Thus, the pressing piece 15c is bent. For this reason, as shown in FIG. 4 (b), only one peak occurs in the insertion force of the core wire 101, the insertion feeling of the core wire 101 becomes good when the electric wire 100 is connected, and the insertion failure of the core wire 101 can be prevented. .
[0028]
In addition, when the distal end portion of the pressing piece 15c that contacts the core wire 101 is disposed in the vicinity of the distal end edge of the locking piece 15b as described above, when the release button 18 is operated to bend the locking piece 15b, the locking piece If 15b and the pressing piece 15c interfere, it will become difficult to perform the release operation. Therefore, in the present embodiment, as shown in FIG. 5, the portion Z of the pressing piece 15c facing the locking piece 15b is curved in a direction away from the locking piece 15b. There is an advantage that the locking piece 15b can be prevented from interfering with the pressing piece 15c when the 15b is bent, and the release operation by the release button 17 becomes easy.
[0029]
Furthermore, in the present embodiment, as shown in FIG. 6, the locking is performed so that a gap is left between the leading edge of the locking piece 15 b and the contact pieces 13 c and 14 c of the terminal plates 11 and 12 without inserting the core wire 101. A spring 15 is formed. That is, with respect to the distance L1 between the contact pieces 13c, 14c and the contact pieces 13c, 14c in the U-shaped portions 13, 14 of the terminal plates 11, 12, the tips of the center piece 15a and the lock piece 15b in the lock spring 15 The distance L2 from the edge is narrowed (L1> L2). Thus, there exists an advantage that the core wire which consists of a strand wire becomes easy by inserting a clearance gap between the front-end edge of the locking piece 15b, and the contact pieces 13c and 14c of the terminal plates 11 and 12. FIG.
[0030]
By the way, depending on the diameter of the core wire 101, when the core wire 101 is inserted between the locking piece 15b and the contact pieces 13c, 14c of the terminal plates 11, 12, the lock spring 15 rotates to stabilize the holding of the core wire 101. There is a possibility of not being able to. Therefore, in the present embodiment, as shown in FIG. 7, a plurality of rounded Rs that protrude in the direction of contact with the core wire 101 are attached to the tip of the pressing piece 15 c that contacts the core wire 101. For this reason, since the contact position of the core wire 101 and the pressing piece 15c changes according to the diameter of the core wire 101, rotation of the lock spring 15 can be prevented and the holding of the core wire 101 can be stabilized.
[0031]
(Embodiment 2)
In the first embodiment, the present invention is applied to a switch having a single-cut type contact portion 8, but in the present embodiment, the present invention is applied to a switch having a three-way type (C contact type) contact portion 8. is doing. FIG. 11 is an exploded perspective view of the switch, FIG. 12A is a front view, FIG. 12B is a side view, FIG. 12C is a bottom view, and FIG. 13 is a cross-sectional view. In addition, the same code | symbol is attached | subjected to the component same as the switch of Embodiment 1, and the description is abbreviate | omitted.
[0032]
The contact portion 8 includes a terminal plate 12 (hereinafter referred to as “first terminal plate”) having the same structure as that of the first embodiment, a movable contact plate 19, and a pair of second terminal plates 58 and 60. The movable contact plate 19 is provided with movable contacts 24a and 24b that come into contact with and separate from fixed contacts 59 and 61, which will be described later, on both front and back surfaces.
[0033]
The second terminal plates 58 and 60 have a U-shaped portion formed in a substantially U-shape like the first terminal plate 12 by bending a plate material made of a conductive material. A pair of lock springs 15 are arranged in the U-shaped portion to constitute the terminal device 6. The U-shaped portions of the second terminal plates 58 and 60 are center pieces 58a and 60a, and contact pieces 58b and 60b that protrude from both end edges of the center pieces 58a and 60a in directions substantially perpendicular to the center pieces 58a and 60a, respectively. It comprises contact pieces 58c and 60c. The terminal device 6 is configured by the second terminal plates 58 and 60 and the pair of lock springs 15. Here, from the central piece 58a of one second terminal plate 58, a substantially L-shaped terminal piece provided with a fixed contact 59 at the tip thereof that comes into contact with and separates from one movable contact 24a of the movable contact plate 19 is provided. 58c is extended. Furthermore, a substantially L-shaped terminal piece 60d provided at the tip thereof with a fixed contact 61 that comes in contact with and separates from the other movable contact 24b of the movable contact plate 19 from the central piece 60a of the other second terminal plate 60. Is extended. The elastic contactors 63 and 64 are attached to the upper surface portions of the central pieces 58a and 60a of the second terminal plates 58 and 60, respectively.
[0034]
The contactors 63 and 64 are mirror images of each other, and are formed from flat plate-shaped main pieces 63a and 64a that are in contact with the central pieces 58a and 60a of the second terminal plates 58 and 60, and one end portions of the main pieces 63a and 64a. Bends are formed at both end edges of the main pieces 63a and 64a adjacent to the contact pieces 63b and 64b, and the substantially strip-shaped contact pieces 63b and 64b that extend and come into contact with a contact portion (not shown) of the circuit board 52d. The paired side pieces 63c, 63d, 64c, 64d are integrally formed of a conductive plate material. From the front edge of one side piece 63c, 64c, the locking piece which latches to the center piece 58a, 60a of the 2nd terminal board 58, 60 is bend | folded inside, and the other side piece 63d, 64d has A locking claw protruding inward is formed by cutting and raising.
[0035]
Thus, after the locking pieces provided on the side pieces 63c and 64c of the contacts 63 and 64 are locked to the end portions of the central pieces 58a and 60a of the second terminal plates 58 and 60, the other side piece 63d. 64d is pressed against the central pieces 58a and 60a, the locking claws provided on the side pieces 63d and 64d are bent in contact with the edges of the central pieces 58a and 60a. When the tip gets over the edge of the central piece 58a, 60a, the locking claw is locked to the end of the central piece 58a, 60a, and the contacts 63, 64 are attached to the second terminal plates 58, 60; Locked and fixed.
[0036]
Here, when a plurality of pressing ribs (not shown) project from the inner peripheral surface of the cover 2 and the body 1 and the cover 2 are assembled to form the container 10, the pressing ribs are formed on the circuit board 52d. The circuit board 52d is pressed against the body 1 side. As a result, the contact portion of the circuit board 52d and the contact pieces 63b and 64b of the respective contacts 63 and 64 are elastically contacted, and the second terminal boards 58 and 60 and the circuit board 52d are electrically connected. When the load is turned off, power is supplied to the lighting display unit 52 via the contacts 63 and 64, and the neon lamp 53 is lit.
[0037]
Thus, in the switch of this embodiment, each time the operation handle 38 is operated, the movable contact 24a and the fixed contact 59, and the movable contact 24b and the fixed contact 61 are alternately contacted / separated, and a load (for example, an illumination load) The neon lamp 53 is turned on when the load is not energized, and the neon lamp 53 is turned off when the load is energized.
[0038]
In addition, the switch to which the terminal device of the present invention is applied is not limited to the above-mentioned single-cut type or three-way type, but the double-cut type (D-contact type) or four-way type ( E contact type). Further, the position display neon lamp 53 may or may not be provided.
[0039]
【The invention's effect】
The invention of claim 1 comprises a terminal plate, and a lock spring for bringing the core wire of the electric wire inserted from the side of the terminal plate into contact with the terminal plate and preventing the core wire from coming off in the anti-insertion direction. By bending an elastic conductive plate material, the central piece facing the terminal plate is inclined toward the terminal plate from the connecting portion with the central piece, and the distal end bites into the core wire. The locking piece that prevents the cable from being pulled out by the center piece, and is pressed toward the terminal plate, and the tip portion presses the core wire toward the terminal plate to elastically hold the core wire between the terminal plate and the terminal piece. It is a terminal device formed with a piece, and this pressing piece is bent so that the distance from the central piece is the narrowest on the tip side than the connecting part with the central piece, and the core wire is locked When the locking piece is bent when it comes into contact with the tip of the piece, the tip As deflect the pressing piece abuts on the tip portion of the piece, it was arranged the leading end of the pressing piece in contact with the core wire to the distal edge near the locking piece, the locking piece during operation in a direction away from the core Since it has a release button that bends, the portion of the pressing piece that faces the locking piece is curved in a direction away from the locking piece. The length from the connection part to the tip part can be lengthened, and the force required to bend the pressing piece is reduced, so the range of applicable wires can be expanded and stranded wires can be connected, When the core wire is inserted between the locking piece and the terminal plate, the distal end portion of the locking piece bent away from the terminal plate comes into contact with the distal end portion of the pressing piece to deflect the pressing piece, and the core wire at the time of connection is inserting feel is improved, it is possible to prevent the core wire of the insertion failure, further Locking piece when flexed the locking piece release button can be prevented from interfering with the pressing piece, there is an effect that the release operation is that a likely due release button.
[0040]
According to the invention of claim 2, in the invention of claim 1 , the lock spring is formed so that a gap is left between the tip edge of the lock piece and the terminal plate without inserting the core wire. There is an effect that the stranded wire can be easily inserted by providing a gap between the tip edge and the terminal board .
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a main part of a switch showing a first embodiment.
2A is a plan view showing a conventional lock spring, and FIG. 2B is a plan view showing the lock spring of the first embodiment.
3A is a side view showing a conventional terminal device, and FIG. 3B is a side sectional view showing the terminal device according to the first embodiment.
4A is an operation explanatory diagram of a conventional example, and FIG. 4B is an operation explanatory diagram of the first embodiment.
FIG. 5 is an explanatory diagram of the above.
FIG. 6 is an explanatory diagram of the above.
7A is a plan view of the lock spring in the same as above, and FIG. 7B is a plan view showing a distal end portion of a pressing piece of the lock spring.
FIG. 8 is an exploded perspective view of the switch in the same as above.
FIG. 9 is a cross-sectional view of the switch of the above.
10A is a front view of the switch in the above, FIG. 10B is a side view of the switch in the above, and FIG. 10C is a bottom view of the switch in the same.
11 is an exploded perspective view of a switch according to Embodiment 2. FIG.
FIG. 12 is a cross-sectional view of the switch of the above.
13A is a front view of the switch in the above, FIG. 13B is a side view of the switch in the above, and FIG. 13C is a bottom view of the switch in the same.
FIG. 14 is a cross-sectional view of a main part of a wiring device showing a conventional example.
[Explanation of symbols]
11, 12 Terminal plate 13, 14 U-shaped part 13c, 14c Contact piece 15 Locking spring 15a Center piece 15b Locking piece 15c Pressing piece 100 Electric wire 101 Core wire

Claims

A terminal plate and a lock spring for bringing the core wire of the electric wire inserted from the side of the terminal plate into contact with the terminal plate and preventing the core wire from coming off in the anti-insertion direction. The lock spring is an electrically conductive plate material having elasticity. The center piece that is arranged opposite to the terminal plate, the locking piece that is inclined toward the tip edge toward the tip edge from the connecting portion with the center piece, and the tip edge bites into the core wire to prevent it from coming off In addition, a pressing piece that is extended from the connection portion with the central piece toward the terminal plate and the tip portion presses the core wire toward the terminal plate to elastically hold the core wire between the terminal plate is formed, This pressing piece is a terminal device that is bent so that the distance from the central piece is the narrowest at the tip side of the connecting portion with the central piece, and the core wire contacts the tip part of the locking piece. When the locking piece is bent, the tip part touches the tip part of the pressing piece. To deflect the pressing piece Te, becomes disposed a tip portion of the pressing piece in contact with the core wire to the distal edge near the locking piece comprises a release button to flex in a direction to separate the locking piece when operating from the core wire, A terminal device, wherein a portion of the pressing piece facing the locking piece is curved in a direction away from the locking piece .

The terminal device according to claim 1 , wherein a lock spring is formed so that a gap is left between the tip edge of the locking piece and the terminal plate without inserting the core wire .