JP4139239B2

JP4139239B2 - Terminal block

Info

Publication number: JP4139239B2
Application number: JP2003026214A
Authority: JP
Inventors: 孝花岡
Original assignee: 東洋技研株式会社
Priority date: 2003-02-03
Filing date: 2003-02-03
Publication date: 2008-08-27
Anticipated expiration: 2023-02-03
Also published as: JP2004241147A

Description

【０００１】
【発明の属する技術分野】
本発明は、複数のリード線を導通片を介して電気的に接続するための端子台に関するものである。
【０００２】
【従来の技術】
杆状導通片を絶縁性基板に横断状に装着し、リード線が杆状導通片に電気的に接続される複数の接続部を、杆状導通片に沿って具備する端子台は種々提案されている。これらの端子台は、前後に重ね合わせられて、据付レール上に保持される（例えば、特許文献１参照。）。
【０００３】
また、上述の端子台にあって、各接続部は、杆状導通片に一体的に形成されて刃先を導通片の長手方向に沿って突出するＶ形破断刃と、ほぼ上下方向のリード線挿入孔と梃子棒貫通孔とが形成され、杆状導通片に沿って移動して、リード線挿入孔がＶ形破断刃から退避する開放位置とＶ形破断刃と上下で重なる接続位置とに位置決めされる可動押圧片と、杆状導通片の底面に形成された梃子棒作動口と、絶縁性基板に形成された、梃子棒貫通孔及び梃子棒作動口とから挿入された梃子棒を傾動可能に内部で支持する操作溝とを備えた構成が、本発明者により提案され、既に特許出願している（特願２００２−０９０６６２）。
【０００４】
かかる構成にあっては、操作溝に挿入された梃子棒の傾動作用による梃子棒貫通孔の従動に伴って可動押圧片を移動して、接続位置でリード線挿入孔に挿入されたリード線をＶ形破断刃にくい込ませて、その導線とＶ形破断刃とを電気的に接続するようになっている。また、リード線の接続状態では、梃子棒貫通孔に導通棒を挿入し、その先端を杆状導通片の底面部に接触させることにより、端子台の導通チェックを行い得るようにもなっている。
【０００５】
【特許文献１】
特開２０００−５８１５５号公報
【０００６】
【発明が解決しようとする課題】
上述の端子台は、リード線の被覆を除去したり、導線に圧着端子を接続することを不要とし、かつ機械的保持強度の高いものであるが、可動押圧片の接続位置への外方変位に伴い、可動押圧片の内方に間隙が生じ、杆状導通片が上方に大きく開放される。このため、リード線の接続状態で、該間隙から塵埃が接続部内に侵入して杆状導通片上に溜まり、該杆状導通片が腐食等により劣化し易くなっている。
【０００７】
本発明は、かかる問題の解決を試みたものであって、防塵機能に優れた端子台の提供を目的とする。
【０００８】
【課題を解決するための手段】
本発明は、杆状導通片を絶縁性基板に横断状に装着し、リード線が杆状導通片に電気的に接続される接続部を、杆状導通片の両側に夫々具備する端子台において、各接続部は、杆状導通片に一体的に形成されて刃先を導通片の長手方向に沿って突出するＶ形破断刃と、ほぼ上下方向のリード線挿入孔と梃子棒貫通孔とが並成され、杆状導通片に沿って移動して、リード線挿入孔がＶ形破断刃から退避する開放位置とＶ形破断刃と上下で重なる接続位置とに位置決めされる可動押圧片と、杆状導通片の底面に形成された梃子棒作動口と、絶縁性基板に形成された、梃子棒貫通孔及び梃子棒作動口とから挿入された梃子棒を傾動可能に内部で支持する操作溝とを備え、操作溝に挿入された梃子棒の傾動作用による梃子棒貫通孔の従動に伴って可動押圧片を移動して、接続位置でリード線挿入孔に挿入されたリード線をＶ形破断刃にくい込ませて、その導線とＶ形破断刃とを電気的に接続するようにしたものにあって、可動押圧片の内端部に配設され、かつ内方に突出する先端を、絶縁性基板の接続部間に厚み方向へ突成された区画突部に連結されてなり、可動押圧片の開放位置では可動押圧片の内端部と区画突部間で屈折して折り畳まれ、可動押圧片の接続位置では該内端部と区画突部との間に生ずる間隙上に差し渡される屈曲防塵片を備えたことを特徴とする端子台である（請求項１）。
【０００９】
ここで可動押圧片の外側とは、リード線挿入孔が形成され、開放位置でＶ形破断刃と対向する側を指し、可動押圧片の内側とはその反対側を指す。かかる構成にあっては、可動押圧片を接続位置へ変位させると、可動押圧片の内端部と、可動押圧片の内方に突成される絶縁性基板の区画突部との間で折り畳まれていた屈曲防塵片が展開し、接続部への変位に伴い該内端部と区画突部間に生じた間隙を上方で遮蔽する。これにより、リード線の接続時に、前記間隙からの塵埃の侵入が防止されることとなる。
【００１０】
ここで、屈曲防塵片を折畳み可能とする構造としては、屈曲防塵片が、可動押圧片の内端部に傾動可能に連成された基辺部と、該基辺部と屈折節部を介して延成され、その端部を区画突部に連結される連結辺部とを一体形成されてなるものであり、可動押圧片の開放位置で、可動押圧片の内端部と区画突部間で屈折節部を中心として折り畳まれるようにした構成が提案される（請求項２）。かかる構成では、可動押圧片の接続位置への変位に伴い、該基辺部の基端が可動押圧片に引張られて、屈曲防塵片が屈折節部を中心として展開し、可動押圧片の内端部と絶縁性基板の区画突部との間に生じる間隙を遮蔽することとなる。
【００１１】
また、屈曲防塵片の屈折節部から下部外方へ突成され、可動押圧片の接続位置で梃子棒貫通孔を下方から遮蔽する可撓性舌片を備えた構成が提案される（請求項３）。かかる構成では、可動押圧片の接続位置で、梃子棒貫通孔が可撓性舌片により遮蔽されるため、塵埃が該梃子棒貫通孔を通って杆状導通片上に落下するのを防止可能となる。また、可動押圧片の接続位置で、梃子棒貫通孔に梃子棒を挿入すると、該梃子棒の先端の押圧作用で可撓性舌片が容易に弾性変形して梃子棒貫通孔を開放するため、梃子棒の操作溝への挿入を妨げることがない。さらに可撓性舌片は、屈曲性防塵弁の屈折節部に突設されるため、該屈折節部の変位に伴って、可動押圧片に対して傾動することとなり、可動押圧片の開放位置と接続位置とで異なる機能を持たせることが可能となる。
【００１２】
ここで、可撓性舌片が、可動押圧片の開放位置で、杆状導通片の梃子棒作動口内に差し渡されるものである構成が提案される（請求項４）。かかる構成にあっては、可動押圧片の開放位置で、梃子棒貫通孔に挿入された梃子棒の挿入端が可撓性舌片に当接すると、該挿入端は、可動性舌片の外側面の案内作用により梃子棒作動口へと案内されることとなる。
【００１３】
さらに、可動押圧片に、梃子棒貫通孔内の外側面を含み、該外側面の仮想延長面が杆状導通片の底面部と交わるように傾斜する導通棒保持面を形成し、可動押圧片の接続位置で、導通棒保持面に沿って梃子棒貫通孔に挿入された導通棒に、前記可撓性舌片の先端が弾接する構成が提案される（請求項５）。かかる構成にあっては、リード線の接続状態で、導通チェックのために導通棒を梃子棒貫通孔に挿入すると、梃子棒貫通孔を遮蔽する可撓性舌片は先端を撓ませ、該導通棒の側面に弾接し、該導通棒を導通棒保持面に押し付けることとなる。そして、この該押圧作用により、該導通棒を杆状導通片の底面部に当接させた状態で保持可能となる。
【００１４】
【発明の実施の形態】
本発明の一実施例を添付図面に従って説明する。
図１は、本発明の一実施例に係る端子台１を示し、ポリカーボネイト等絶縁性樹脂材料によって板状に形成された左右対称の絶縁性基板２を主体部とし、杆状導通片２０及び可動押圧片３０，３０が絶縁性基板２上に装着される（図２参照）。また、端子台１の両側には杆状導通片２０にリード線８０を接続するための接続部３，３が配設される。
【００１５】
この絶縁性基板２は、図２に示すように、背板１０から所定肉厚で画成壁４が突出することにより、座定溝面５，５などを一面側で開放状に形成する。ここで、左右の接続部３，３間には、該画成壁４により接続部３間を遮蔽するようにして区画突部７が形成される。すなわち、絶縁性基板２の上面は区画突部７の上端から両側へ、等角度で傾斜したへ字状をなし、その傾斜辺の内側を、画成壁４により傾斜辺に沿ってほぼ矩形状に区画された座定溝面５，５とし、さらに座定溝面５，５上を上方へ開放する結線口６，６としている。また前記座定溝面５，５の底部には、梃子棒８２（図１７，１８参照）の先端部を支持側縁９で傾動可能に支持する上方へ拡開する操作溝８が、画成壁４により区画形成されている。
【００１６】
また、絶縁性基板２の周囲に形成された画成壁４の前面の適宜位置に連結孔５５を形成し、さらに背板１０の、該連結孔５５と対向する位置に、該連結突起（図示せず）を形成して、相互に嵌入することにより、端子台１相互は重ね合わせ状に連結される。また最端部の端子台１の画成壁４に端子台１とほぼ同一外形の端板５７が被着される（図３，４参照）。
【００１７】
このようにして端子台１は、図３，４で示すように、上述した据付レール７０の連係突部７１，７１に連結片１５，１５を係合して、据付レール７０上に多数重ね合わせ状に連結される。さらに、この端子台列を据付レール７０上で固定するために、該据付レール７０に固定金具７６，７６が螺子７７により固定される。
【００１８】
また、導通片２０は、図１に示すように、座定溝面５，５に差し渡して装着され、絶縁性基板２の背板１０に対して、へ字状に屈曲した杆状をなす。この杆状導通片２０の、各座定溝面５，５に装着される各辺部は接続部３，３の主部を構成するものであり、この杆状導通片２０についてさらに詳細に説明する。
【００１９】
杆状導通片２０は、図５〜８で示すように、各座定溝面５，５に装着される各辺部にあって、底面部２１ａと、該底面部２１ａの両側から起立する側面部２１ｂ，２１ｂとからなる断面コ字状をなす。また、その図５中の両側では、側面部２１ｂ，２１ｂから舌片部２１ｃ，２１ｃが湾曲状に延出して、その端縁を接触状に対向させており、舌片部２１ｃ，２１ｃの内側端縁に、刃先を杆状導通片２０の長手方向に沿って突出するＶ形破断刃２２を削成している。さらに、底面部２１ａには、操作溝８の開口に臨む部位を切欠して、梃子棒作動口２３，２３を形成している。
【００２０】
そして、可動押圧片３０は、図１に示すように、接続部３，３にあって、杆状導通片２０の側面部２１ｂ，２１ｂ間に、該杆状導通片２０に沿って移動可能に装着される。この可動押圧片３０は、ナイロン等の絶縁性合成樹脂を成型してなり、図９，１０に示すように、外側（図９，１０中の右側）にリード線挿入孔３１が、内側（図９，１０中の左側）に梃子棒貫通孔３２が上下方向へ夫々形成される。また、リード線挿入孔３１と梃子棒貫通孔３２との間には、作動孔４４が上下方向に形成されており、作動孔４４内には、後述するリード線挿入確認片４０が昇降可能に保持される。そして、可動押圧片３０の内端（図９，１０中の左端）には、本発明の主要部である屈曲防塵片６３と可撓性舌片６４とが該可動押圧片３０と一体的に形成される。
【００２１】
さらに図９〜１５に従って、詳しく述べる。なお、以下の説明では、可動押圧片３０の内方とは図９中の左方を指し、外方とは図９中の右方を指す。可動押圧片３０は、正面鉤形をなす肉厚な基部３３と、該基部３３の外側下部に形成され、杆状導通片２０の側面部２１ｂ，２１ｂ間に嵌入する正面略Ｕ字形をなす肉薄な押圧部３４とを備える。
【００２２】
梃子棒貫通孔３２は、前記基部３３の内側部に、杆状導通片２０の長尺方向と直交するようにして上下に貫通状に形成される。そして、梃子棒８２を、梃子棒貫通孔３２及び梃子棒作動口２３を通し、操作溝８に挿入して傾動すると、梃子棒貫通孔３２の内側面が該梃子棒８２に押圧され、可動押圧片３０が、内方の開放位置Ｉと外方の接続位置IIとの間を移動するようになっている（図１７，１８参照）。ここで、梃子棒貫通孔３２内の外側面には、押圧部３４の外表の内側面と連続して導通棒保持面６２が形成される。この導通棒保持面６２は、延長面が杆状導通片２０の底面部２１ａと交わるよう下方に向かうに連れて外方に傾斜しており、後述するように、可動押圧片３０の接続位置IIで、梃子棒貫通孔３２に挿入した導通棒８５の側面を該導通棒保持面６２に押し付けることにより、該導通棒８５を該底面部２１ａに当接した状態で保持し得るようになっている（図１９（ヘ）参照）。
【００２３】
また、可動押圧片３０の外側部に形成される前記リード線挿入孔３１は、基部３３外側部を上下に貫通する貫通部３１ａと、該貫通部３１ａの下端と連通し、押圧部３４内で前後に開放する開放部３１ｂとからなり、該開放部３１ｂの下部をリード線挿入端８１の座定位置Ｘとしている。
【００２４】
そして、開放部３１ｂ内の外側面には、舌片状のリード線保持片４６が、下部内方に突設される。かかるリード線保持片４６は、リード線８０の挿入時に、リード線挿入端８１により押圧され、先端部を下部外方へ弾性変形する。そして、その復元弾力により、該リード線挿入端８１を開放部３１ｂ内の内側面に押し付けて、リード線挿入端８１を座定位置Ｘに押し止めるようになっている（図１６参照）。
【００２５】
さらに、押圧部３４の上部には、リード線挿入孔３１の両側に位置させて、薄板状の隙間板４５ａ，４５ｂが形成される。かかる隙間板４５ａ，４５ｂは、可動押圧片３０が、開放位置Ｉから接続位置IIに変位する際に、舌片部２１ｃ，２１ｃ間に進入して、リード線８０の被覆部が適切に切断されるように、Ｖ形破断刃２２の間を所定幅に押し広げる（図２０参照）。
【００２６】
そして、可動押圧片３０の上面には、突成部３８が形成される。この突成部３８の上端には、前後に指標凹部９０，９０が形成されており、絶縁性基板２の結線口６，６に形成される開放位置Ｉを示すマーク３９ａや接続位置IIを示すマーク３９ｂ（図２参照）に、該指標凹部９０を一致させることにより、可動押圧片３０が開放位置Ｉと接続位置IIへの位置決めを確実に行い得るようにしている。
【００２７】
また、押圧部３４の下部前後面には突起３６，３６が形成されており、一方、杆状導通片２０の側面部２１ｂ，２１ｂ内側には突部２５が形成される（図５〜８参照）。そして、この突起３６，３６と突部２５とは、可動押圧片３０が、開放位置Ｉや接続位置IIに位置する状態で相互に当接し、可動押圧片３０を保持する節度手段を構成する。
【００２８】
次に、リード線挿入確認片４０、及び該リード線挿入確認片４０を変位させる確認片変位手段について、図９〜図１５に従って説明する。確認片変位手段は、リード線挿入確認片４０を昇降可能に保持する作動孔４４と、リード線挿入端８１の押圧作用によりリード線挿入確認片４０を上昇させる傾動変換片４２により構成される。
【００２９】
リード線挿入確認片４０は、図９，１０に示すように、下部に切欠部９１が形成された上下に長い杆状をなし、可動押圧片３０の作動孔４４内に昇降可能に保持される。この作動孔４４は、可動押圧片３０の中央部に上下に形成されており、その断面は、嵌入するリード線挿入確認片に対して、遊びのない形状となっている。そして、作動孔４４の上端は、突成部３８の上面に開口し、その上方をリード線挿入確認片４０上端の確認位置Ｙとする。一方、作動孔４４の下端は、その外側をリード線挿入孔３１の開放部３１ｂに開口し、保持するリード線挿入確認片４０の切欠部９１が、該開放部３１ｂに露出する。また、可動押圧片３０は赤色樹脂、リード線挿入確認片４０は白色樹脂により形成されており、該リード線挿入確認片４０が上端を確認位置Ｙとした際に、可動押圧片３０との色の対比により視認容易となるようにしている。
【００３０】
一方、傾動変換片４２は、隙間板４５ｂの下方に垂下する薄肉保持部４７の下端から両側に突出する杆状をなし、該薄肉保持部４７を介して可動押圧片３０と一体的に形成される。そして、傾動変換片４２の両端のうち、開放部３１ｂに突出する受圧端４８は、リード線８０挿入時にリード線挿入端８１と当接するようにその先端を座定位置Ｘ上方に配置され、一方、作動孔４４下部の開口側へ突出する係合端５０は、その先端をリード線挿入確認片４０の切欠部９１に嵌入される。かかる構成にあっては、図１６に示すように、リード線挿入孔３１の座定位置Ｘにリード線８０を挿入すると、リード線挿入端８１の押圧作用により、リード線挿入確認片４０の上端が確認位置Ｙへ突出して端子台１の外方から視認容易となり、該リード線挿入端８１が座定位置Ｘまで挿入されたことを作業者に報知し得るようになっている。
【００３１】
次に本発明の要部である屈曲防塵片６３及び可撓性舌片６４の構成について図９〜１４に従って説明する。屈曲防塵片６３は、可動押圧片３０の内端部に内方に連成された基辺部６５と、該基辺部６５の先端に上方に延成される連結辺部６６とを一体形成した正面Ｖ形をなし、基辺部６５と連結辺部６６間の連結部に屈折節部６７を形成する。前記基辺部６５は、中央に膨大部を有する薄片状をなし、その肉薄部分の弾性変形により、屈折節部６７を中心にして連結辺部６６が傾動する。また、連結辺部６６は前記基辺部６５よりも肉厚の板片状をなし、その先端には正面略円形の膨大部６０が形成される。この膨大部６０は、図１に示すように、可動押圧片３０を絶縁性基板２に装着する時に、絶縁性基板２の区画突部７の上部両側に形成される連結溝部６１，６１（図２参照）に嵌入して、屈曲防塵片６３を区画突部７に連結する。
【００３２】
一方の可撓性舌片６４は、屈曲防塵片６３の屈折節部６７から下部外方に突成される。この可撓性舌片６４は長尺な薄片状をなし、基端である屈折節部６７の移動に従って内外に傾動し、先端を導通棒保持面６２に当接する位置と、導通棒保持面６２から退避する位置とに変動する。
【００３３】
ここで、リード線８０の接続部３，３への結線手順を、図１７，１８に従って説明する。
リード線８０の非接続時には、可動押圧片３０は、開放位置Ｉとなっている（図１７（イ）参照）。この状態で、結線口６，６からリード線８０を、リード線挿入孔３１に挿入し、リード線８０の挿入端８１が、座定位置Ｘまで達すると、上述したように、傾動変換片４２の傾動により、リード線挿入確認片４０の上端が確認位置Ｙに突出し、外方から容易に視認可能となる（図１７（ロ）参照）。
【００３４】
そして、梃子棒貫通孔３２及び梃子棒作動口２３から梃子棒８２を挿入し、その先端を操作溝８の底縁に当接する（図１８（ハ）参照）。次に、梃子棒８２を支持側縁９を支点として操作溝８内で傾動すると、梃子棒貫通孔３２は、梃子棒８２に対して遊びがほとんどないから、該梃子棒８２の傾動操作による回動モーメントの作用を受けて、可動押圧片３０は梃子棒貫通孔３２での梃子棒８２の幅変位に相当する分だけ杆状導通片２０に沿って移動して接続位置IIとなる（図１８（ニ）参照）。
【００３５】
この可動押圧片３０の接続位置IIへの変位により、可動押圧片３０は、押圧部３４が舌片部２１ｃ，２１ｃ内に嵌合し、かつリード線挿入孔３１がＶ形破断刃２２と上下で重なる。そして図２０に示すように、リード線挿入孔３１に挿入されたリード線８０は、リード線挿入孔３１の内面によりＶ形破断刃２２へ押し付けられ（図２０ロ参照）、舌片部２１ｃ，２１ｃの端縁部間に嵌入して挟圧されることとなる（図２０ハ参照）。ここで、該Ｖ形破断刃２２の刃先は長手方向に沿って突出しているから、リード線８０の被覆８４に刃先が食い込んで、内部の導線８３が切断されない程度に被覆８４が破断され、その導線８３はＶ形破断刃２２と圧接することで杆状導通片２０と電気的に接続する。また、Ｖ形破断刃２２間で挟持され、リード線挿入端８１は引き抜き不能に保持されることとなる。
【００３６】
次に、上述の結線手順に伴う、屈曲防塵片６３と可撓性舌片６４の作動を説明する。リード線８０が接続されておらず、可動押圧片３０が、開放位置Ｉにある状態では、図１７（イ）に示すように、可動押圧片３０の内端が区画突部７に接近して、屈曲防塵片６３は、基辺部６５を撓ませて、屈折節部６７を中心にして可動押圧片３０と区画突部７との間で折畳まれている。一方、可撓性舌片６４は、杆状導通片２０の梃子棒作動口２３に差し渡される。かかる構成にあっては、梃子棒貫通孔３２に挿入された梃子棒８２の挿入端が可撓性舌片６４に当接すると、該可撓性舌片６４の案内作用により該挿入端は梃子棒作動口２３へ案内されることとなる。このため、開放位置Ｉにおいて、梃子棒８２を円滑に操作溝８へ挿入できる（図１７（ロ），図１８（ハ）参照）。
【００３７】
そして、梃子棒８２を、操作溝８内の支持側縁９を支点として傾動し、可動押圧片３０を接続位置IIへ移動させると、連結辺部６６の先端が区画突部７と連結しているため、可動押圧片３０の移動に伴って、屈折節部６７を中心に屈曲防塵片６３が展開して、図１８（ニ）に示すように、可動押圧片３０の内端部と区画突部７との間に差し渡されて杆状導通片２０の上方を遮蔽することとなる。このため、リード線８０の接続状態で、可動押圧片３０と区画突部７との間に生じる間隙から塵埃が内部に侵入するのを防止できる。
【００３８】
一方、可撓性舌片６４は、可動押圧片３０の接続位置IIへ移動に伴う屈折節部６７の変位により、梃子棒８２の側面に先端を当接させて撓んだ状態となる（図１８（ニ）参照）。そして、かかる状態で梃子棒８２を端子台１から引抜くと、該可撓性舌片６４は、復元弾力により先端を導通棒保持面６２に当接させて、梃子棒貫通孔３２を下方から遮蔽する（図１９（ホ）参照）。すなわち、リード線８０の接続状態にあっては、梃子棒貫通孔３２に梃子棒８２等が挿入されない状態で、該梃子棒貫通孔３２が遮蔽されるから、該梃子棒貫通孔３２から杆状導通片２０に塵埃が侵入するのを防止できる。
【００３９】
また、図１９（ヘ）に示すように、可動押圧片３０の接続位置IIで導通棒８５を梃子棒貫通孔３２に挿入し、可撓性舌片６４を下方に撓ませて杆状導通片２０の底面部２１ａに当接させると、可撓性舌片６４が先端を導通棒８５側面に弾接し、該導通棒８５は導通棒保持面６２に押し付けられて、先端を杆状導通片２０に当接した状態で保持されることとなる。かかる構成にあっては、導通チェックの際に、作業者が導通棒８５を保持することを要しないため、簡単に端子台１の導通状態を判定できる。
【００４０】
以上のように実施例を説明したが、本発明は、上記実施例の構成に限定したものではなく、本発明の趣旨の範囲内で適宜変更可能である。例えば、屈曲防塵片６３は、正面Ｖ形のものに限らず、正面Ｗ形のように、複数の屈折節部６７を有する形状としてもよい。また、区画突部７は、本実施例のように、接続部３，３を遮蔽するような形状に限定されず、連結溝部７１のみを備える簡素なものでも構わない。さらに、本発明は、左右に接続部３を一つずつ具備する端子台１に限らず、杆状導通片２０の一側に複数の可動押圧片３０を装着して、一側に接続部３を複数具備した端子台にも適用できる。
【００４１】
【発明の効果】
本発明は、可動押圧片の内端部に配設され、かつ内方に突出する先端を、絶縁性基板の接続部間に厚み方向へ突成された区画突部に連結されてなり、可動押圧片の開放位置では可動押圧片の内端部と区画突部間で屈折して折り畳まれ、可動押圧片の接続位置では該内端部と区画突部との間に生ずる間隙上に差し渡される屈曲防塵片を備えたから（請求項１）、リード線の接続時に、可動押圧片の内端部と区画突部との間から塵埃が侵入するのを防止できるため、杆状導通片の劣化を抑えることができる。
【００４２】
ここで、屈曲防塵片が、可動押圧片の内端部に傾動可能に連成された基辺部と、該基辺部と屈折節部を介して延成され、その端部を区画突部に連結される連結辺部とを一体形成されてなるものであり、可動押圧片の開放位置で、可動押圧片の内端部と区画突部間で屈折節部を中心として折り畳まれるようにすれば（請求項２）、簡素な構成により屈曲防塵片が折畳み可能となる。また、屈曲防塵片を可動押圧片と一体的に形成することにより、屈曲防塵片の組み付け行程が不要となり、製造コストを削減できる。
【００４３】
また、屈曲防塵片の屈折節部から下部外方へ突成され、可動押圧片の接続位置で梃子棒貫通孔を下方から遮蔽する可撓性舌片を備えた構成では（請求項３）、可動押圧片の接続位置で、梃子棒貫通孔から塵埃が杆状導通片に落下するのを防止できる。また、この可撓性舌片は、梃子棒の押圧作用で容易に撓むものであるから、可動押圧片の接続位置でも、梃子棒を操作溝へ簡単に挿入できる。
【００４４】
そして、可撓性舌片が、可動押圧片の開放位置で、杆状導通片の梃子棒作動口内に差し渡される構成では（請求項４）、可撓性舌片の案内作用により、可動押圧片の開放位置で、梃子棒貫通孔に挿入した梃子棒の挿入端が、梃子棒作動口へ案内されるため、該梃子棒を操作溝まで円滑に挿入できる。
【００４５】
さらに、可動押圧片に、梃子棒貫通孔内の外側面を含み、該外側面の仮想延長面が杆状導通片の底面部と交わるように傾斜する導通棒保持面を形成し、可動押圧片の接続位置で、導通棒保持面に沿って梃子棒貫通孔に挿入された導通棒に、前記可撓性舌片の先端が弾接する場合には（請求項５）、導通棒を杆状導通片と当接した状態で保持し得るため、端子台の導通チェックを簡単に行うことができる。
【図面の簡単な説明】
【図１】本発明の端子台１を示す正面図である。尚、画成壁４は断面を付して示す。
【図２】絶縁性基板２の正面図である。尚、画成壁４は断面を付して示す。
【図３】集合した端子台１を据付レール７０に装着した状態を示す平面図である。
【図４】集合した端子台１を据付レール７０に装着した状態を示す側面図である。
【図５】杆状導通片２０を一部切欠して示す正面図である。
【図６】杆状導通片２０の一辺側の平面図である。
【図７】杆状導通片２０の一辺側の側面図である。
【図８】図６のＡ−Ａ断面図である。
【図９】可動押圧片３０及びリード線挿入確認片４０の正面図である。
【図１０】リード線挿入確認片４０を保持した状態での可動押圧片３０の縦断面図である。
【図１１】可動押圧片３０の平面図である。
【図１２】図９のＢ−Ｂ断面図である。
【図１３】可動押圧片３０の底面図である。
【図１４】可動押圧片３０の内側面図である。
【図１５】可動押圧片３０の外側面図である。
【図１６】リード線８０挿入に伴うリード線挿入確認片４０の変位態様を示す説明図（イ），（ロ），（ハ）である。
【図１７】接続部３，３への結線手順を示す説明図（イ），（ロ）である。
【図１８】接続部３，３への結線手順を示す説明図（ハ），（ニ）である。
【図１９】接続部３，３への結線手順を示す説明図（ホ），（ヘ）である。
【図２０】リード線８０の接続過程を示す説明図（イ），（ロ），（ハ）である。
【符号の説明】
１端子台
２絶縁性基板
３接続部
４画成壁
７区画突部
２０杆状導通片
３０可動押圧片
３１リード線挿入孔
３２梃子棒貫通孔
６２導通棒保持面
６３屈曲防塵片
６４可撓性舌片
６５基辺部
６６連結辺部
６７屈折節部
８０リード線
８２梃子棒
Ｉ開放位置
II 接続位置[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a terminal block for electrically connecting a plurality of lead wires via a conductive piece.
[0002]
[Prior art]
Various terminal blocks have been proposed in which a hook-shaped conductive piece is mounted transversely on an insulating substrate, and a plurality of connection portions are provided along the hook-shaped conductive piece so that lead wires are electrically connected to the hook-shaped conductive piece. ing. These terminal blocks are overlapped in the front-rear direction and held on the installation rail (see, for example, Patent Document 1).
[0003]
Further, in the above-described terminal block, each connection portion is formed integrally with the bowl-shaped conductive piece and has a V-shaped breaking blade that protrudes along the longitudinal direction of the conductive piece, and a substantially vertical lead wire. An insertion hole and a lever rod through-hole are formed and move along the bowl-shaped conducting piece, so that the lead wire insertion hole is retracted from the V-shaped breaking blade and a connection position where the V-shaped breaking blade overlaps vertically Tilt the lever rod inserted from the movable pressing piece to be positioned, the lever rod operating port formed on the bottom surface of the rod-shaped conducting piece, and the lever rod through-hole and lever rod operating port formed on the insulating substrate. The present inventor has proposed a configuration including an operation groove that is supported inside as much as possible, and has already filed a patent application (Japanese Patent Application No. 2002-090662).
[0004]
In such a configuration, the movable pressing piece is moved in accordance with the follow-up of the lever rod through-hole due to the tilting movement of the lever rod inserted in the operation groove, and the lead wire inserted into the lead wire insertion hole at the connection position is moved. The lead wire and the V-shaped breaking blade are electrically connected to each other by inserting the V-shaped breaking blade. In addition, in the connected state of the lead wire, it is possible to check the continuity of the terminal block by inserting a conducting rod into the through hole of the insulator rod and bringing its tip into contact with the bottom surface of the bowl-shaped conducting piece. .
[0005]
[Patent Document 1]
Japanese Patent Laid-Open No. 2000-58155
[Problems to be solved by the invention]
The terminal block described above does not require removal of the lead wire coating or connection of the crimp terminal to the conducting wire, and has high mechanical holding strength. As a result, a gap is generated inward of the movable pressing piece, and the bowl-shaped conducting piece is greatly opened upward. For this reason, in the connected state of the lead wire, dust enters the connecting portion from the gap and accumulates on the hooked conductive piece, and the hooked conductive piece is easily deteriorated due to corrosion or the like.
[0007]
The present invention is an attempt to solve such a problem, and an object thereof is to provide a terminal block having an excellent dustproof function.
[0008]
[Means for Solving the Problems]
The present invention relates to a terminal block in which hook-shaped conductive pieces are mounted transversely on an insulating substrate, and lead portions are electrically connected to the hook-shaped conductive pieces on both sides of the hook-shaped conductive pieces , respectively. Each connecting portion is formed of a V-shaped breaking blade that is integrally formed with the bowl-shaped conducting piece and has a blade tip protruding along the longitudinal direction of the conducting piece, a substantially vertical lead wire insertion hole, and a lever rod through-hole. A movable pressing piece that is aligned and moved along the bowl-shaped conducting piece and positioned at an open position where the lead wire insertion hole is retracted from the V-shaped breaking blade and a connection position overlapping the V-shaped breaking blade vertically; An operation groove that supports the lever rod, which is inserted from the lever rod through hole and the lever rod operation port, formed in the bottom surface of the rod-shaped conducting piece and the insulator rod through hole and the lever rod operation port so as to be tiltable. It is movable with the follower of the lever rod through-hole by tilting the lever rod inserted in the operation groove The pressure piece is moved so that the lead wire inserted into the lead wire insertion hole at the connecting position is inserted into the V-shaped breaking blade so as to electrically connect the conducting wire and the V-shaped breaking blade. The tip that is disposed at the inner end of the movable pressing piece and protrudes inwardly is connected to the partition protrusion protruding in the thickness direction between the connecting portions of the insulating substrate. Is bent and bent between the inner end of the movable pressing piece and the partition projection, and is bent over the gap formed between the inner end and the partition projection at the connection position of the movable pressing piece. A terminal block comprising a dustproof piece (claim 1).
[0009]
Here, the outer side of the movable pressing piece refers to the side where the lead wire insertion hole is formed and faces the V-shaped breaking blade in the open position, and the inner side of the movable pressing piece refers to the opposite side. In such a configuration, when the movable pressing piece is displaced to the connection position, the movable pressing piece is folded between the inner end of the movable pressing piece and the partition protrusion of the insulating substrate that protrudes inward of the movable pressing piece. The bent bent dust-proof piece expands and shields the gap formed between the inner end and the partitioning projection with the displacement to the connecting portion. This prevents dust from entering through the gap when connecting the lead wires.
[0010]
Here, as a structure that allows the bent dust-proof piece to be folded, the bent dust-proof piece is connected to the inner end of the movable pressing piece so as to be tiltable, and through the base and the refractive node. And is formed integrally with a connecting side portion whose end is connected to the partition projection, and between the inner end of the movable pressing piece and the partition projection at the open position of the movable pressing piece. A configuration is proposed in which the fold is centered on the refractive node (claim 2). In such a configuration, with the displacement of the movable pressing piece to the connection position, the base end of the base side portion is pulled by the movable pressing piece, and the bent dustproof piece is developed around the refractive node, A gap generated between the end portion and the partition projection of the insulating substrate is shielded.
[0011]
In addition, a configuration is proposed that includes a flexible tongue piece that protrudes downward from the bending node of the bent dustproof piece and shields the lever rod through-hole from below at the connection position of the movable pressing piece. 3). In such a configuration, since the lever rod through hole is shielded by the flexible tongue piece at the connection position of the movable pressing piece, it is possible to prevent dust from falling on the rod-shaped conductive piece through the lever rod through hole. Become. Further, when the lever rod is inserted into the lever rod through-hole at the connecting position of the movable pressing piece, the flexible tongue piece is easily elastically deformed by the pressing action of the tip of the lever rod to open the lever rod through-hole. The insertion of the lever rod into the operation groove is not hindered. Furthermore, since the flexible tongue protrudes from the refracting node of the flexible dustproof valve, it is tilted with respect to the movable pressing piece in accordance with the displacement of the refracting node, so that the movable pressing piece is opened. It is possible to have different functions depending on the connection position.
[0012]
Here, a configuration is proposed in which the flexible tongue piece is passed into the lever rod operating port of the bowl-shaped conducting piece at the open position of the movable pressing piece (claim 4). In such a configuration, when the insertion end of the lever rod inserted into the lever rod through hole comes into contact with the flexible tongue piece at the open position of the movable pressing piece, the insertion end is outside the movable tongue piece. It will be guided to the lever rod operation port by the side guide action.
[0013]
Further, the movable pressing piece includes an outer surface in the insulator rod through hole, and a conductive bar holding surface that is inclined so that a virtual extension surface of the outer surface intersects the bottom surface portion of the bowl-shaped conductive piece is formed. In this connection position, a configuration is proposed in which the tip of the flexible tongue piece is elastically contacted with the conductive rod inserted into the lever rod through hole along the conductive rod holding surface (Claim 5). In such a configuration, when the conducting rod is inserted into the lever rod through hole in order to check the continuity in the connected state of the lead wire, the flexible tongue that shields the lever rod through hole deflects the tip, and the conduction It is elastically brought into contact with the side surface of the bar, and the conductive bar is pressed against the conductive bar holding surface. And by this press action, it becomes possible to hold the conductive rod in a state where it is in contact with the bottom surface of the bowl-shaped conductive piece.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to the accompanying drawings.
FIG. 1 shows a terminal block 1 according to an embodiment of the present invention, which has a symmetrical conductive substrate 2 formed in a plate shape by an insulating resin material such as polycarbonate as a main part, and a bowl-shaped conductive piece 20 and a movable member. The pressing pieces 30 are mounted on the insulating substrate 2 (see FIG. 2). Further, on both sides of the terminal block 1, connecting portions 3 and 3 for connecting the lead wires 80 to the bowl-shaped conducting piece 20 are disposed.
[0015]
As shown in FIG. 2, the insulating substrate 2 projects the seating groove surfaces 5, 5, etc. in an open state on the one surface side by projecting the defining wall 4 with a predetermined thickness from the back plate 10. Here, a partition projection 7 is formed between the left and right connecting portions 3 and 3 so as to shield the connecting portion 3 by the defining wall 4. That is, the upper surface of the insulating substrate 2 has a rectangular shape inclined at an equal angle from the upper end of the partition projection 7 to both sides, and the inside of the inclined side is substantially rectangular along the inclined side by the defining wall 4. The seating groove surfaces 5 and 5 are divided into two, and the connection ports 6 and 6 are further opened upward on the seating groove surfaces 5 and 5. Further, at the bottom of the seating groove surfaces 5 and 5, there is defined an operation groove 8 that expands upward so that the tip end portion of the lever rod 82 (see FIGS. 17 and 18) is tiltably supported by the support side edge 9. A partition is formed by the wall 4.
[0016]
Further, a connection hole 55 is formed at an appropriate position on the front surface of the defining wall 4 formed around the insulating substrate 2, and the connection protrusion (see FIG. The terminal blocks 1 are connected to each other in a superposed manner. Further, an end plate 57 having substantially the same outer shape as the terminal block 1 is attached to the defining wall 4 of the terminal block 1 at the end (see FIGS. 3 and 4).
[0017]
In this way, as shown in FIGS. 3 and 4, the terminal block 1 is engaged with the connecting protrusions 71, 71 of the mounting rail 70 described above so that the connecting pieces 15, 15 are overlaid on the mounting rail 70. Connected to each other. Further, in order to fix the terminal block row on the installation rail 70, fixing brackets 76 are fixed to the installation rail 70 with screws 77.
[0018]
Further, as shown in FIG. 1, the conductive piece 20 is mounted so as to extend over the seating groove surfaces 5 and 5, and has a hook-like shape bent with respect to the back plate 10 of the insulating substrate 2. Each side portion of the hook-shaped conductive piece 20 mounted on each seating groove surface 5, 5 constitutes a main part of the connecting portions 3, 3. The hook-shaped conductive piece 20 will be described in more detail. To do.
[0019]
As shown in FIGS. 5 to 8, the bowl-shaped conducting piece 20 is located on each side portion mounted on each seating groove surface 5, 5, and includes a bottom surface portion 21 a and side surfaces that stand from both sides of the bottom surface portion 21 a. It has a U-shaped cross section composed of the portions 21b and 21b. Further, on both sides in FIG. 5, tongue pieces 21c and 21c extend from the side faces 21b and 21b in a curved shape, and their edges are opposed in contact with each other, and the inside of the tongue pieces 21c and 21c. A V-shaped breaking blade 22 whose edge is projected along the longitudinal direction of the bowl-shaped conducting piece 20 is cut at the end edge. Furthermore, on the bottom surface portion 21a, portions that face the opening of the operation groove 8 are cut out to form lever rod operation ports 23,23.
[0020]
As shown in FIG. 1, the movable pressing piece 30 is located in the connecting portions 3 and 3, and is movable between the side surface portions 21 b and 21 b of the bowl-shaped conduction piece 20 along the bowl-shaped conduction piece 20. Installed. The movable pressing piece 30 is formed by molding an insulating synthetic resin such as nylon. As shown in FIGS. 9 and 10, a lead wire insertion hole 31 is provided on the outside (right side in FIGS. 9 and 10). On the left side of 9, 10, insulator rod through holes 32 are respectively formed in the vertical direction. In addition, an operation hole 44 is formed in the vertical direction between the lead wire insertion hole 31 and the insulator rod through hole 32, and a lead wire insertion confirmation piece 40 (to be described later) can be moved up and down in the operation hole 44. Retained. At the inner end (the left end in FIGS. 9 and 10) of the movable pressing piece 30, the bent dustproof piece 63 and the flexible tongue piece 64, which are the main parts of the present invention, are integrated with the movable pressing piece 30. It is formed.
[0021]
Further details will be described with reference to FIGS. In the following description, the inner side of the movable pressing piece 30 indicates the left side in FIG. 9, and the outer side indicates the right side in FIG. The movable pressing piece 30 is formed in a thin base 33 having a front bowl shape and a thin front part having a substantially U-shape that is formed between the side portions 21b and 21b of the bowl-like conduction piece 20 and formed on the outer lower portion of the base 33. A pressing portion 34.
[0022]
The lever rod through hole 32 is formed in the inner portion of the base portion 33 in a vertically penetrating manner so as to be orthogonal to the longitudinal direction of the hook-shaped conductive piece 20. When the lever rod 82 is tilted by being inserted into the operation groove 8 through the lever rod through hole 32 and the lever rod operating port 23 and tilted, the inner surface of the lever rod through hole 32 is pressed by the lever rod 82 and is movable and pressed. The piece 30 moves between the inner open position I and the outer connection position II (see FIGS. 17 and 18). Here, a conductive bar holding surface 62 is formed on the outer surface of the lever rod through hole 32 continuously with the inner surface of the outer surface of the pressing portion 34. The conductive bar holding surface 62 is inclined outwardly so that the extended surface crosses the bottom surface portion 21a of the bowl-shaped conductive piece 20, and as will be described later, the connecting position II of the movable pressing piece 30 is inclined. Thus, by pressing the side surface of the conducting rod 85 inserted into the insulator rod through hole 32 against the conducting rod holding surface 62, the conducting rod 85 can be held in contact with the bottom surface portion 21a. (See FIG. 19 (f)).
[0023]
Further, the lead wire insertion hole 31 formed in the outer portion of the movable pressing piece 30 communicates with a through portion 31a vertically passing through the outer portion of the base portion 33 and a lower end of the through portion 31a, and within the pressing portion 34. The open portion 31b is opened to the front and rear, and the lower portion of the open portion 31b is a seating position X of the lead wire insertion end 81.
[0024]
Then, a tongue-like lead wire holding piece 46 is provided on the outer side surface in the open portion 31b so as to project inward from the lower part. When the lead wire 80 is inserted, the lead wire holding piece 46 is pressed by the lead wire insertion end 81 and elastically deforms the tip portion outwardly from the lower part. Then, due to the restoring elasticity, the lead wire insertion end 81 is pressed against the inner surface of the open portion 31b, and the lead wire insertion end 81 is pressed to the seating position X (see FIG. 16).
[0025]
Further, thin plate-like gap plates 45 a and 45 b are formed on the upper portion of the pressing portion 34 so as to be positioned on both sides of the lead wire insertion hole 31. When the movable pressing piece 30 is displaced from the open position I to the connection position II, the gap plates 45a and 45b enter between the tongue pieces 21c and 21c, and the covering portion of the lead wire 80 is appropriately cut. Thus, the space between the V-shaped breaking blades 22 is expanded to a predetermined width (see FIG. 20).
[0026]
A projecting portion 38 is formed on the upper surface of the movable pressing piece 30. At the upper end of the protruding portion 38, index concave portions 90, 90 are formed in the front and rear, and a mark 39a indicating the open position I and the connection position II formed in the connection ports 6, 6 of the insulating substrate 2 are shown. By aligning the index recess 90 with the mark 39b (see FIG. 2), the movable pressing piece 30 can be surely positioned at the open position I and the connection position II.
[0027]
Further, protrusions 36 are formed on the front and rear surfaces of the lower portion of the pressing portion 34, while a protrusion 25 is formed inside the side surface portions 21b, 21b of the bowl-shaped conductive piece 20 (see FIGS. 5 to 8). ). The protrusions 36 and 36 and the protrusion 25 constitute a moderation means for holding the movable pressing piece 30 by abutting each other with the movable pressing piece 30 positioned at the open position I or the connection position II.
[0028]
Next, the lead wire insertion confirmation piece 40 and confirmation piece displacement means for displacing the lead wire insertion confirmation piece 40 will be described with reference to FIGS. The confirmation piece displacing means includes an operation hole 44 that holds the lead wire insertion confirmation piece 40 so as to be movable up and down, and a tilt conversion piece 42 that raises the lead wire insertion confirmation piece 40 by the pressing action of the lead wire insertion end 81.
[0029]
As shown in FIGS. 9 and 10, the lead wire insertion confirmation piece 40 has a vertically long bowl shape with a notch 91 formed in the lower portion, and is held up and down in the operation hole 44 of the movable pressing piece 30. . The operation hole 44 is formed vertically in the central portion of the movable pressing piece 30, and its cross section has a shape free of play with respect to the lead wire insertion confirmation piece to be inserted. The upper end of the operation hole 44 opens to the upper surface of the projecting portion 38, and the upper portion thereof is set as a confirmation position Y of the upper end of the lead wire insertion confirmation piece 40. On the other hand, the lower end of the operating hole 44 opens to the open portion 31b of the lead wire insertion hole 31, and the notch 91 of the lead wire insertion confirmation piece 40 to be held is exposed to the open portion 31b. The movable pressing piece 30 is made of red resin, and the lead wire insertion confirmation piece 40 is made of white resin. When the lead wire insertion confirmation piece 40 has the upper end at the confirmation position Y, the color with the movable pressing piece 30 is This makes it easy to visually recognize.
[0030]
On the other hand, the tilt conversion piece 42 has a hook-like shape that protrudes on both sides from the lower end of the thin holding portion 47 that hangs down below the gap plate 45 b, and is formed integrally with the movable pressing piece 30 via the thin holding portion 47. The Of the two ends of the tilt conversion piece 42, the pressure receiving end 48 protruding to the open portion 31b is disposed with its tip above the seating position X so as to come into contact with the lead wire insertion end 81 when the lead wire 80 is inserted. The engagement end 50 projecting toward the opening side below the operation hole 44 is inserted into the notch 91 of the lead wire insertion confirmation piece 40 at its tip. In this configuration, as shown in FIG. 16, when the lead wire 80 is inserted into the seating position X of the lead wire insertion hole 31, the upper end of the lead wire insertion confirmation piece 40 is pressed by the pressing action of the lead wire insertion end 81. Protrudes to the confirmation position Y and is easily visible from the outside of the terminal block 1 so that the operator can be notified that the lead wire insertion end 81 has been inserted to the seating position X.
[0031]
Next, the structure of the bent dustproof piece 63 and the flexible tongue piece 64 which are the main parts of this invention is demonstrated according to FIGS. The bent dust-proof piece 63 is integrally formed with a base part 65 that is inwardly coupled to the inner end part of the movable pressing piece 30 and a connecting side part 66 that extends upward at the tip of the base part 65. The refraction node portion 67 is formed at the connecting portion between the base side portion 65 and the connecting side portion 66. The base side portion 65 is formed in a thin piece shape having an enormous portion at the center, and the connecting side portion 66 tilts around the refractive node portion 67 due to elastic deformation of the thin portion. Further, the connecting side portion 66 has a plate-like shape that is thicker than the base side portion 65, and a massive portion 60 having a substantially circular front surface is formed at the tip thereof. As shown in FIG. 1, when the movable pressing piece 30 is attached to the insulating substrate 2, the enormous portion 60 is formed by connecting groove portions 61, 61 (see FIG. 1) formed on both upper sides of the partition projection 7 of the insulating substrate 2. 2) and the bent dustproof piece 63 is connected to the partition projection 7.
[0032]
One flexible tongue 64 protrudes downward from the bending node 67 of the bent dust-proof piece 63. The flexible tongue 64 is in the form of a long thin piece, tilts inward and outward in accordance with the movement of the refracting node 67 which is the base end, and a position where the distal end abuts on the conducting rod holding surface 62 and the conducting rod holding surface 62. It fluctuates to the position to evacuate.
[0033]
Here, the procedure for connecting the lead wire 80 to the connecting portions 3 and 3 will be described with reference to FIGS.
When the lead wire 80 is not connected, the movable pressing piece 30 is in the open position I (see FIG. 17A). In this state, when the lead wire 80 is inserted into the lead wire insertion hole 31 from the connection ports 6 and 6, and the insertion end 81 of the lead wire 80 reaches the seating position X, as described above, the tilt conversion piece 42 is inserted. The upper end of the lead wire insertion confirmation piece 40 protrudes to the confirmation position Y and can be easily visually recognized from the outside (see FIG. 17B).
[0034]
Then, the lever rod 82 is inserted from the lever rod through-hole 32 and the lever rod operating port 23, and its tip abuts against the bottom edge of the operation groove 8 (see FIG. 18C). Next, when the lever rod 82 is tilted in the operation groove 8 with the support side edge 9 as a fulcrum, the lever rod through hole 32 has little play with respect to the lever rod 82, so that the lever rod 82 is rotated by the tilting operation. Under the action of the dynamic moment, the movable pressing piece 30 moves along the rod-shaped conducting piece 20 by an amount corresponding to the width displacement of the lever rod 82 in the lever rod through-hole 32 and becomes the connection position II (FIG. 18). (See D).
[0035]
Due to the displacement of the movable pressing piece 30 to the connection position II, the pressing part 34 of the movable pressing piece 30 is fitted into the tongue pieces 21c and 21c, and the lead wire insertion hole 31 is vertically connected to the V-shaped breaking blade 22. Overlap. As shown in FIG. 20, the lead wire 80 inserted into the lead wire insertion hole 31 is pressed against the V-shaped breaking blade 22 by the inner surface of the lead wire insertion hole 31 (see FIG. 20B), and the tongue piece 21c, It will be inserted and pinched between the edge parts of 21c (refer FIG. 20C). Here, since the cutting edge of the V-shaped breaking blade 22 protrudes in the longitudinal direction, the cutting edge bites into the covering 84 of the lead wire 80, and the covering 84 is broken to such an extent that the internal conductor 83 is not cut. The conducting wire 83 is electrically connected to the bowl-shaped conducting piece 20 by being in pressure contact with the V-shaped breaking blade 22. Further, the lead wire insertion end 81 is held between the V-shaped breaking blades 22 so that it cannot be pulled out.
[0036]
Next, the operation of the bent dustproof piece 63 and the flexible tongue 64 according to the above-described connection procedure will be described. When the lead wire 80 is not connected and the movable pressing piece 30 is in the open position I, the inner end of the movable pressing piece 30 approaches the partition projection 7 as shown in FIG. The bent dustproof piece 63 bends between the movable pressing piece 30 and the partition projection 7 around the refracting node 67 by bending the base part 65. On the other hand, the flexible tongue 64 is passed to the lever rod operating port 23 of the bowl-shaped conducting piece 20. In this configuration, when the insertion end of the lever rod 82 inserted into the lever rod through hole 32 comes into contact with the flexible tongue 64, the insertion end is moved by the guiding action of the flexible tongue 64. It will be guided to the rod operating port 23. For this reason, in the open position I, the lever rod 82 can be smoothly inserted into the operation groove 8 (see FIGS. 17B and 18C).
[0037]
Then, when the lever rod 82 is tilted with the support side edge 9 in the operation groove 8 as a fulcrum and the movable pressing piece 30 is moved to the connection position II, the tip of the connection side portion 66 is connected to the partition projection 7. Therefore, as the movable pressing piece 30 moves, the bent dustproof piece 63 develops around the refracting node portion 67, and as shown in FIG. It is passed between the part 7 and the upper part of the bowl-shaped conducting piece 20 is shielded. For this reason, in the connected state of the lead wire 80, it is possible to prevent dust from entering the inside through a gap generated between the movable pressing piece 30 and the partition projection 7.
[0038]
On the other hand, the flexible tongue 64 is in a bent state with its tip abutting against the side surface of the lever rod 82 due to the displacement of the refraction node 67 accompanying the movement of the movable pressing piece 30 to the connection position II (see FIG. 18 (d)). Then, when the lever rod 82 is pulled out from the terminal block 1 in this state, the flexible tongue 64 brings the tip into contact with the conducting rod holding surface 62 by restoring elasticity, and the lever rod through hole 32 is moved from below. Shield (see FIG. 19 (e)). That is, when the lead wire 80 is connected, the lever rod through-hole 32 is shielded without the lever rod 82 inserted in the lever rod through-hole 32. It is possible to prevent dust from entering the conductive piece 20.
[0039]
Further, as shown in FIG. 19 (f), the conducting rod 85 is inserted into the lever rod through hole 32 at the connection position II of the movable pressing piece 30, and the flexible tongue piece 64 is bent downward to form the bowl-shaped conducting piece. 20 is brought into contact with the side surface of the conducting rod 85, and the conducting rod 85 is pressed against the conducting rod holding surface 62, and the tip is brought into contact with the bowl-shaped conducting piece 20. It will be held in a state where it abuts against. In such a configuration, it is not necessary for the operator to hold the conductive rod 85 during the continuity check, so that the conductive state of the terminal block 1 can be easily determined.
[0040]
Although the embodiments have been described above, the present invention is not limited to the configurations of the above embodiments, and can be appropriately changed within the scope of the gist of the present invention. For example, the bent dustproof piece 63 is not limited to the front V shape, and may have a shape having a plurality of refracting nodes 67 like a front W shape. Moreover, the partition protrusion 7 is not limited to a shape that shields the connecting portions 3 and 3 as in this embodiment, and may be a simple one having only the connecting groove 71. Furthermore, the present invention is not limited to the terminal block 1 having one connection part 3 on each of the left and right sides, but a plurality of movable pressing pieces 30 are attached to one side of the bowl-shaped conduction piece 20 and the connection part 3 is provided on one side. It is applicable also to the terminal block provided with two or more.
[0041]
【The invention's effect】
According to the present invention, the movable push piece is disposed at the inner end portion, and the tip projecting inward is connected to the partition projecting portion projecting in the thickness direction between the connection portions of the insulating substrate. At the release position of the pressing piece, it is refracted and folded between the inner end of the movable pressing piece and the partition projection, and at the connection position of the movable pressing piece, it is passed over the gap formed between the inner end and the partition projection. Since the bent dust-proof piece is provided (Claim 1), dust can be prevented from entering between the inner end portion of the movable pressing piece and the partition projection when the lead wire is connected. Can be suppressed.
[0042]
Here, the bent dust-proof piece is extended to the inner end portion of the movable pressing piece so as to be tiltable, and extends through the base portion and the refracting node portion, and the end portion is defined as a partition projection. The connecting side portion connected to the inner portion of the movable pressing piece is integrally formed and is folded between the inner end portion of the movable pressing piece and the partition projection with the refractive node as the center. (Claim 2), the bent dustproof piece can be folded with a simple configuration. Further, by forming the bent dustproof piece integrally with the movable pressing piece, the assembling process of the bent dustproof piece becomes unnecessary, and the manufacturing cost can be reduced.
[0043]
Further, in the configuration provided with a flexible tongue piece that protrudes outward from the refractive node of the bent dustproof piece and shields the lever rod through-hole from below at the connection position of the movable pressing piece (Claim 3), It is possible to prevent dust from falling from the insulator rod through-hole to the bowl-shaped conducting piece at the connection position of the movable pressing piece. Moreover, since this flexible tongue piece is easily bent by the pressing action of the lever bar, the lever bar can be easily inserted into the operation groove even at the connection position of the movable pressing bar.
[0044]
In the configuration in which the flexible tongue piece is passed through the lever rod operating port of the bowl-shaped conducting piece at the open position of the movable pressing piece (Claim 4), the flexible tongue piece can be moved by the guide action. Since the insertion end of the lever rod inserted into the lever rod through hole is guided to the lever rod operating port at the open position of the piece, the lever rod can be smoothly inserted into the operation groove.
[0045]
Further, the movable pressing piece includes an outer surface in the insulator rod through hole, and a conductive bar holding surface is formed so as to be inclined so that a virtual extension surface of the outer surface intersects the bottom surface portion of the bowl-shaped conductive piece. When the tip of the flexible tongue piece is elastically contacted with the conducting rod inserted into the lever rod through hole along the conducting rod holding surface at the connection position (Claim 5), the conducting rod is connected to the conducting rod. Since it can hold | maintain in the state contact | abutted with a piece, the continuity check of a terminal block can be performed easily.
[Brief description of the drawings]
FIG. 1 is a front view showing a terminal block 1 of the present invention. The defining wall 4 is shown with a cross section.
FIG. 2 is a front view of an insulating substrate 2; The defining wall 4 is shown with a cross section.
FIG. 3 is a plan view showing a state in which the assembled terminal block 1 is mounted on the installation rail 70. FIG.
4 is a side view showing a state in which the assembled terminal block 1 is mounted on the installation rail 70. FIG.
FIG. 5 is a front view showing the bowl-shaped conducting piece 20 with a part cut away.
6 is a plan view of one side of the bowl-shaped conducting piece 20. FIG.
7 is a side view of one side of the bowl-shaped conductive piece 20. FIG.
8 is a cross-sectional view taken along the line AA in FIG.
9 is a front view of the movable pressing piece 30 and the lead wire insertion confirmation piece 40. FIG.
10 is a longitudinal sectional view of the movable pressing piece 30 in a state where the lead wire insertion confirmation piece 40 is held. FIG.
11 is a plan view of the movable pressing piece 30. FIG.
12 is a cross-sectional view taken along the line BB in FIG.
13 is a bottom view of the movable pressing piece 30. FIG.
14 is an inner side view of the movable pressing piece 30. FIG.
15 is an outer side view of the movable pressing piece 30. FIG.
FIGS. 16A and 16B are explanatory views (a), (b), and (c) showing a displacement mode of the lead wire insertion confirmation piece 40 when the lead wire 80 is inserted. FIGS.
FIGS. 17A and 17B are explanatory views (a) and (b) showing a connection procedure to the connection units 3 and 3; FIGS.
FIGS. 18A and 18B are explanatory views (c) and (d) showing a connection procedure to the connection units 3 and 3; FIGS.
FIGS. 19A and 19B are explanatory views (e) and (f) showing a connection procedure to the connection units 3 and 3; FIGS.
20 is an explanatory diagram (a), (b), (c) showing a connection process of the lead wire 80. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Terminal block 2 Insulating board | substrate 3 Connection part 4 Definition wall 7 Compartment protrusion part 20 Conductive piece 30 Movable press piece 31 Lead wire insertion hole 32 Insulator rod through-hole 62 Conduction rod holding surface 63 Bending dustproof piece 64 Flexibility Tongue piece 65 Base side portion 66 Connection side portion 67 Refraction node portion 80 Lead wire 82 Insulator bar I Open position
II Connection position

Claims

In the terminal block, the hook-shaped conductive piece is mounted on the insulating substrate in a transverse manner, and the lead wire is electrically connected to the hook-shaped conductive piece on each side of the hook-shaped conductive piece .
Each connection is
A V-shaped breaking blade that is integrally formed with the bowl-shaped conducting piece and projects the blade edge along the longitudinal direction of the conducting piece;
An approximately vertical lead wire insertion hole and a lever rod through hole are juxtaposed, move along the hook-shaped conductive piece, and an open position where the lead wire insertion hole retracts from the V-shaped breaking blade and a V-shaped breaking blade A movable pressing piece that is positioned at a connection position that overlaps vertically;
An insulator rod operating port formed on the bottom surface of the bowl-shaped conducting piece;
An operation groove formed on the insulating substrate for supporting the lever rod inserted through the lever rod through hole and the lever rod operating port so as to be tiltable;
The movable pressing piece is moved in accordance with the movement of the lever rod through-hole due to the tilting movement of the lever rod inserted in the operation groove so that the lead wire inserted into the lead wire insertion hole is difficult to insert at the connection position. The electrical wire and the V-shaped breaking blade are electrically connected,
The tip that is arranged at the inner end of the movable pressing piece and protrudes inward is connected to the partition projection protruding in the thickness direction between the connecting portions of the insulating substrate, and the movable pressing piece is opened. The bent dustproof piece is refracted and folded between the inner end portion of the movable pressing piece and the partition projection at the position, and is passed over the gap formed between the inner end portion and the partition projection at the connection position of the movable pressing piece. A terminal block characterized by comprising:

The bent dust-proof piece extends through a base part that is tiltably coupled to the inner end part of the movable pressing piece, the base part and the refractive node part, and the end part is connected to the partition projection. The connecting side portion is integrally formed, and is folded around the refractive node between the inner end portion of the movable pressing piece and the partition projection at the open position of the movable pressing piece. The described terminal block.

3. The flexible tongue piece according to claim 2, further comprising a flexible tongue piece projecting outwardly from the lower part of the bent dustproof piece and shielding the lever rod through-hole from below at the connecting position of the movable pressing piece. Terminal block.

The terminal block according to claim 3, wherein the flexible tongue piece is inserted into the lever rod operating port of the bowl-shaped conducting piece at the open position of the movable pressing piece.

The movable pressing piece includes an outer surface in the through hole of the lever rod, and a conductive bar holding surface that is inclined so that a virtual extension surface of the outer surface intersects the bottom surface of the hook-shaped conductive piece is formed. 5. The terminal block according to claim 3, wherein the tip of the flexible tongue piece is elastically contacted with the conducting rod inserted into the lever rod through hole along the conducting rod holding surface.