JP2004095241A

JP2004095241A - Electrical connection structure

Info

Publication number: JP2004095241A
Application number: JP2002252208A
Authority: JP
Inventors: Naohisa Tsukamura; 塚村　尚久
Original assignee: Sanyo Electric Co Ltd
Current assignee: Sanyo Electric Co Ltd
Priority date: 2002-08-30
Filing date: 2002-08-30
Publication date: 2004-03-25

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrical connection structure capable of making stable electrical connections even with a use for a long period of time and a frequent operation for connection or disconnection. <P>SOLUTION: A first lead member 1 has a metal lead plate 10, the first lead plate 10 has a groove 11 of a V-shape in a sectional view formed so as to be shallow in the depth as proceeding to the inner side from one side of the first lead plate 10, a second lead member 3 has a metal second lead plate 30 curved in a U-shape in a sectional view so as to obtain elasticity, and a protrusion 32a is formed at one end side of the second lead plate 30. In a state that the first lead member 1 is connected to the second lead member 3, the protrusion 32a of the second lead plate 30 is contacted to the groove 11 of the first lead plate 10 in a state pressed to the groove. When the first and second lead members 1, 3 are attached and connected, the protrusion 32a is slid in a direction in which the depth of the groove 11 is shallowed in a state that the protrusion 32a is abutted to the groove 11, and the connection of the first and second lead members 1, 3 is completed. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、電気ソケットのような着脱自在の電気接続構造に関する。
【０００２】
【従来の技術】
従来、着脱自在の電気ソケットあるいはコンセントの電気接続構造においては、一方に円柱または板状の金属ピンと、他方にこれを嵌合する金属受け部とが接触して電気接続するものであった。
【０００３】
【発明が解決しようとする課題】
このような従来の電気接続構造においては、長期の使用及び多数の着脱操作により、嵌合する金属受け部の嵌り具合がゆるくなって、安定的な電気接続を得られるほどに金属ピンと接触できなくなることがある。このような問題を解決するために、嵌り具合をきつくすると、装着時に大きな力を必要とする。
【０００４】
また、長期の使用により、金属ピン、金属受け部の表面が腐食して電気絶縁膜が形成され、金属ピンが金属受け部に嵌め込まれて接触しても、安定的に電気接続できないことがあった。
【０００５】
本発明は、このような問題点を解決するために成されたものであり、着脱自在の電気接続構造において、長期の使用及び多数の着脱操作によっても、安定的な電気接続が得られる電気接続構造を提供することを目的とする。また、装着時に、
大きな力が必要としない、電気接続構造を提供することを目的とする。
【０００６】
【課題を解決するための手段】
本発明の構成は、第１リード部材と、第２リード部材が着脱自在に接続されて、電気接続される電気接続構造であって、前記第１リード部材は、金属製の第１リード板を有し、該第１リード板は、その一辺より内側に進む溝部を有し、前記第２リード部材は、金属製の第２リード板を有し、該第２リード板の一端側には突起を備え、前記第１リード部材と前記第２リード部材とが接続された状態においては、前記第２リード板の前記突起が、前記第１リード板の前記溝に押圧された状態で接触し、前記第１リード部材と前記第２リード部材とを接続する時には、前記第２リード板の前記突起が、前記第１リード板の前記一辺より前記溝部に入り込むことを特徴とする。
【０００７】
また、本発明の構成は、第１リード部材と、第２リード部材が着脱自在に接続されて、電気接続される電気接続構造であって、前記第１リード部材は、金属製の第１リード板を有し、該第１リード板は、その一辺より内側に進むにつれて深さが小さくなる溝部を有し、前記第２リード部材は、弾性力を得るために断面視略Ｕ字状に折曲された金属製の第２リード板を有し、該第２リード板の一端側には突起を備え、前記第１リード部材と前記第２リード部材とが接続された状態においては、前記第２リード板の前記突起が、前記第１リード板の前記溝に押圧された状態で接触し、前記第１リード部材と前記第２リード部材とを接続する時には、前記突起が前記溝部に当接された状態で、前記突起が前記溝部が浅くなる方向に摺動して、接続が完了されることを特徴とする。
【０００８】
更には、本発明の構成は、第１リード部材と、第２リード部材が着脱自在に接続されて、電気接続される電気接続構造であって、前記第１リード部材は、金属製の第１リード板を有し、該第１リード板は、その一辺より内側に進むにつれて深さが小さくなる２つの側面からなる断面視Ｖ字状の溝部を有し、前記第２リード部材は、金属製の第２リード板を有し、該第２リード板の一端側には曲面状の突起を備え、前記第１リード部材と前記第２リード部材とが接続された状態においては、前記第２リード板の前記突起が、前記第１リード板の前記溝の前記両側面に押圧された状態で接触し、前記第１リード部材と前記第２リード部材とを接続する時には、前記突起が前記溝部に当接された状態で、前記突起が前記溝部が浅くなる方向に摺動して、接続が完了されることを特徴とする。
【０００９】
【発明の実施の形態】
以下、図１〜４を用いて、本発明の一実施例を詳細に説明する。本実施例の電気接続構造は、第１リード部材１と、第２リード部材３とが着脱自在に接続され、電気接続される。
【００１０】
第１リード部材１においては、一対の第１リード板１０、１０が、第１保持部材２０に保持されている。
【００１１】
第１リード板１０は、銅の表面にめっき処理した金属製で略細長い矩形形状であり、下辺より内側である上側に進むにつれて深さが浅くなる断面視Ｖ字状の溝部１１を有している。Ｖ字状の溝部１１の両側は、側面１１ａ、１１ａとなっている。また、溝部１１が形成された付近の下側面においては、第１リード板１０の厚さが徐々に小さくなるように傾斜面１２となっている。そして、第１リード板１０の上側においては、小さい長方形形状の一辺を残して打ち抜き折曲することで、係止片１３が形成されている。この係止片１３には、別途用意されるリード線５（図３において点線で示される）の先端を保持する。このリード線５は、負荷に電力を供給するのに利用する。
【００１２】
第１保持部材２０は、樹脂材料からなり、下側に連結突起部２１を備える４角柱状の外形を備ている。そして、上面から内部に渡り、第１リード板１０が挿入されて嵌合する嵌合孔２２、２２を有している。図３に示すように、第１リード板１０を挿入した状態においては、嵌合孔２２に、第１リード板１０が保持され、連結突起部２１の内側には、第１リード板１０の溝部１１が表れる。
【００１３】
一方、第２リード部材３においては、一対の第２リード板３０、３０が、第２保持部材２０に保持されている。
【００１４】
第２リード板３０は、銅の表面にめっき処理した金属製で、略細長い板を途中で折曲して、断面視略Ｕ字状とすることで弾性力を持たせ、保持部３１と弾性端３２とを形成している。よって、弾性端３２は、図３の紙面左右方向において、弾性力を有している。弾性端３２には、裏側より押し出すことにより形成された略半球状の突起３２ａを有している。そして、保持部３１は、幅広の嵌合部３１ａと、この嵌合部３１ａの下側に位置する第２リード板３０を裏側より押す出すことにより形成された略半球状の嵌合用突起３３と、この下に小さい長方形形状の一辺を残して打ち抜き折曲することで形成された抜き止め片３４とを有している。
【００１５】
また、第２保持部材４０は、樹脂材料からなり、上側に中空の挿入口４２を有す略４角柱形状である。そして、第２保持部材４０の内側には、第２リード板３０を保持するための溝４１、４１を有している。溝４１においては、第２保持部材４０内の中空部４２に面する幅狭の溝開口４１ａと、奥側に位置する幅広の奥側部４１ｂとを備え、この奥側部４１ｂの幅方向の両端が、嵌合部４１ｃとなっている。更には、挿入口４２下には底部４３を有し、溝４１が延在してこの底部４３中を貫通している。
【００１６】
図３に示すように、上述の構造の第２リード板３０を、上方向から第２保持部材４０の溝４１の奥側部４１ｂにスライドさせて挿入すると、溝４１の中を、抜け止め片３４が押し戻された状態で通過して、底面側に貫通して、抜け止め片３４が起立状態に復元してその先端が底部４３の底面と当接し、この状態では、第２リード板３０は上方向に抜けなくなる。また、挿入された状態においては、底部４３を通過する溝４１の中で、嵌合用突起３３が嵌合状態となり、また、第２リード板３０の嵌合部３１ａの両端が、溝部４１の奥側部４１ｂ両端の嵌合部４１ｃに嵌合することより、確実に保持されることになる。また、挿入された状態においては、第２リード板３０の下端には、別途用意される電源機能を有するリード線（図示せず）が半田付け等により接続固定される。
【００１７】
次に、上述の第１リード部材１と、第２リード部材２とを接続する状態について、説明する。図３に示されるように、第２リード部材３における第２保持部材４０の挿入口４２に、第１リード部材１における第１保持部材２０の連結突起２１を挿入することにより、接続される。また、接続状態から第１リード部材１と、第２リード部材２とを、図３の紙面上下方向に引き離すことより、取り外すことができる。接続、取り外し操作の上下動においては、第２リード板３０における突起３２ａの略半球状の頂部が、第１リード板１０の中心線上を動くことになる。また、Ｖ字状溝部１１の側面１１ａ、１１ａが交差する谷線上を、突起３２ａの略半球状の頂部が上下動することになる。
【００１８】
ここで、図４（ｂ）に示すように、挿入、接続操作の中頃には、第２リード板３０における弾性端３２の突起３２ａが、第１リード板１０の溝部１１に比較的ゆるく押圧されているが、図４（ｄ）及び（ｅ）に示すように、挿入が進むにつれて、溝部１１の深さが浅くなることより、第２リード板３０がより折曲されるので、突起３２ａを有する弾性端３２の復元力が大きくなって、図３の状態で挿入、接続が終了し連結される。このように、溝部１１の深さが浅くなることより、弾性端３２に位置する突起３２ａが当接しながら摺動するとき、徐々に強く溝部１１に押圧されることになるので、接触が確実となり電気接続が安定する。更には、突起３２ａとこれと当接する溝部１１において、徐々に強く押圧されてお互いに擦れながら摺動することになるので、両者の金属表面に形成された絶縁膜を擦り落としながら、両者の金属が接触するように機能することより、電気接続が安定し、長期の使用及び多数の着脱操作によっても、安定的な電気接続が得られる。
【００１９】
また、図４（ｃ）、（ｅ）に示されるように、略半球状である突起３２ａと、Ｖ字状の溝部１１の両側面１１ａ、１１ａ又は側面の上端部１１ａｔ（図４（ｅ）参照）とが、２ケ所で接触するので、より確実に電気接続を得ることができる（なお、本明細書においては、両側面１１ａ、１１ａの上端部１１ａｔも、側面１１ａの一部を意味している）。ここで、突起３２ａは、略半球状であるが、図４（ｃ）、（ｅ）のように２ケ所で接触できるのであれば、略半球状形状に限定されることなく、曲面状であればいい。
【００２０】
次に、以上の本実施例の特徴点について、比較例を用いて説明する。
【００２１】
まず、本実施例が、挿入、接続操作に大きな力を必要としないことを説明する。図４（ａ）は、本実施例の接続操作の初期頃を示す要部断面図であり、折曲された第２リード板３０における弾性端３２は押圧が開放された状態である。図４（ａ）の状態より、第２リード板３０が上方向に移動して（図に移動方向を矢印で示す）、弾性端３２及び突起３２ａが、第１リード板１００の下辺に当たり、突起３２が溝部１１に当接してここに入り込む。この場合の接続操作に要する力は、実測して６．７Ｎであった。
【００２２】
また、図５（ａ）は、図４（ａ）に対応して比較例の接続操作の初期を示す要部断面図である。本実施例との違いは、第１リード板１０において、溝部１１が形成されていない点のみが異なり、その他の点は同一である。図５の比較例において、本実施例と同じ符号を利用して説明は省略する。図５（ａ）で確認できるように、接続操作初期においては、折曲された比較例の第２リード板３０における弾性端３２は押圧が開放された状態である。図５（ａ）の状態より、第２リード板３０が上方向に移動して（図に移動方向を矢印で示す）、弾性端３２及び突起３２ａが、比較例の第１リード板１００の下辺、特に、図５（ａ）における下辺右コーナーに当って乗り越えて傾斜面１２に当接することになる。この比較例の接続操作に要する力は、実測して７．５Ｎであった。
【００２３】
このように、図５（ａ）の比較例においては、突起３２ａが下辺の右コーナーを乗り越える時に大きな力を必要とするが、本実施例においては、比較例で突起が乗り越える時に大きな力を要した下辺の右コーナーが、溝部１１にて緩やかなコーナーとなっていることより、接続操作に要する力が少なくて済むことが確認できた。
【００２４】
次に、本実施例が、長期の使用及び多数の着脱操作によっても、接続操作時に必要とする力が大きく増加することがないことを説明する。本実施例においては、　図４（ｂ）及び（ｃ）に示されるように、接続操作の途中で突起３２ａが溝１１の深い部分に位置するときにおいては、略半球状の突起３２ａは、その頂部より離れた側部近傍で、断面視Ｖ字状の溝部１１の両側面１１ａ、１１ａと、２箇所で接触することになる。続いて、接続操作の完了時においては、図４（ｄ）及び（ｅ）に示されるように、略半球状の突起３２ａは、その頂部の近傍で、断面視Ｖ字状の溝部１１の両側面１１の上端部１１ａｔ（図４（ｅ）参照）と、２箇所で接触することになる（なお、本明細書においては、両側面１１ａ、１１ａの上端部１１ａｔも、側面１１ａの一部を意味している）。このように、突起３２ａが溝部１１が浅くなる方向に摺動して接続が完了されるとき、突起３２ａにおいて溝部１１の両側面１１ａ、１１ａと当接、接触する箇所も移動するので、長期の使用及び多数の着脱操作によっても、突起３２ａにおいて一箇所が接触して磨耗し、面接触状態となることも少なく。よって、接続操作時に必要とする力が大きく増加することが少ない。本実施例においては、使用開始時期における接続操作に要する力は、実測して６．７Ｎで、着脱操作を２５００回繰り返した後の接続操作に要する力は、実測して５．５Ｎ（対初期値８２％）であった。また、使用開始時期における第１リード部材１及び第２リード部材３との接続抵抗は、４．１６ｍΩで、着脱操作を２５００回繰り返した後の接続抵抗は、４．５４ｍΩ（対初期値１０９％）であった。
【００２５】
また、比較例においては、図５（ｂ）及び（ｃ）に示すように、傾斜面１２と突起３２ａの頂部付近の一箇所のみが摺動することになるので、長期の使用及び多数の着脱操作によっても、一箇所が接触して磨耗して面接触状態となり、摺動するときの摩擦力が大きくなり、接続操作時に大きな力が必要となる。比較例においては、使用開始時期における接続操作に要する力は、実測して７．５Ｎで、着脱操作を２５００回繰り返した後の接続操作に要する力は、実測して１８．５Ｎ（対初期値２４７％）であった。また、使用開始時期における第１リード部材１及び第２リード部材３との接続抵抗は、５．９９ｍΩで、着脱操作を２５００回繰り返した後の接続抵抗は、５．８０ｍΩ（対初期値１０９％）であった。
【００２６】
このように、本実施例においては、比較例と比較しても、長期の使用及び多数の着脱操作によっても、接続操作時に必要とする力が大きく増加することが少ないことが確認できた。また、本実施例においては、図４にて確認できるように、略半球状である突起３２ａが、断面視Ｖ字状の溝部１１の両側面１１ａ、１１ａとの２ケ所で接触するので、接触抵抗も小さく、より確実に接触することができると共に、磨耗も低減できる。
【００２７】
【発明の効果】
請求項１の本発明においては、第１リード部材と第２リード部材とを接続する時には、第２リード板の突起が、第１リード板の一辺より溝部に入り込むことより、突起が一辺に衝突する力を低減することができる。一方、上述のように溝部がない比較例においては、リード板の一辺に、突起が衝突して、接続操作時に大きな力を必要とする。
【００２８】
請求項２の本発明においては、突起が溝部が浅くなる方向に摺動して、接続が完了されることより、接続が完了時点に近づくにつれて、第２リード板がより折曲されることになるので、突起を有する第２リード板の復元力が増加する。よって、接続の完了時には大きな復元力で、突起が溝部に押圧されることになり、確実に電気接続を得ることができる。
【００２９】
請求項３の本発明においては、略半球状の突起が、その一辺より内側に進むにつれて深さが小さくなる２つの側面からなる断面視Ｖ字状の溝部に当接された状態で、突起が溝部が浅くなる方向に摺動して接続が完了されることより、接続操作が進んで完了されるまでに、突起において溝部の両側面と接触する２箇所の部分も、移動することになる。よって、長期の使用及び多数の着脱操作によって、上述の比較例で説明したように一箇所の部分が摺動して接続操作時に大きな力を必要となることもなく、容易に接続することができる。また、本発明においては、突起と溝部が２箇所で接触することになるので、上述の比較例にあるように一箇所で接触する場合と比較して、接触抵抗も小さく、より確実に接触することができると共に、磨耗も低減できる。
【図面の簡単な説明】
【図１】本発明の一実施例の第１リード部材を示す分解斜視図である。
【図２】本発明の一実施例の第２リード部材を示す分解斜視図である。
【図３】本発明の一実施例の接続状態での断面図である。（図１のＡ−Ａ線断面、図２のＡ−Ａ線断面に相当する）
【図４】本発明の一実施例の挿入、接続する状態を説明する要部断面図であり（図３と同じ線の断面に相当する）、（ａ）は接続操作の初期頃を示す図、（ｂ）は接続操作の中頃を示す断面図、（ｃ）は（ｂ）におけるＡ−Ａ線断面図、（ｄ）は接続操作が進んだ完了時を示す断面図、（ｅ）は（ｄ）におけるＡ−Ａ線断面図である。
【図５】比較例の挿入、接続する状態を説明する要部断面図であり（図４と同じ線の断面に相当する）、（ａ）は接続操作の初期頃を示す図、（ｂ）は接続操作の中頃を示す断面図、（ｃ）は接続操作が進んだ完了時を示す断面図である。
【符号の説明】
１　第１リード部材
３　第２リード部材
１０　第１リード板
１１　溝部
１１ａ　側面
２０　第１保持部材
３０　第２リード板
３２　弾性端
３２　突起３２ａ
４０　第２保持部材[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a detachable electric connection structure such as an electric socket.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in an electrical connection structure of a detachable electric socket or outlet, a cylindrical or plate-shaped metal pin is contacted on one side with a metal receiving portion to which the pin is fitted for electrical connection.
[0003]
[Problems to be solved by the invention]
In such a conventional electrical connection structure, due to long-term use and a large number of attachment / detachment operations, the fitting state of the fitted metal receiving portion is loosened, and the metal pin cannot be brought into contact with the metal pin enough to obtain a stable electrical connection. Sometimes. In order to solve such a problem, if the fitting state is tight, a large force is required at the time of mounting.
[0004]
In addition, due to long-term use, the surfaces of the metal pins and the metal receiving portion are corroded and an electric insulating film is formed. Even if the metal pins are fitted into and contacted with the metal receiving portion, stable electrical connection may not be achieved. Was.
[0005]
SUMMARY OF THE INVENTION The present invention has been made to solve such problems, and in a detachable electric connection structure, an electric connection that can obtain a stable electric connection even after long-term use and many detachment operations. The purpose is to provide a structure. In addition, at the time of wearing,
An object of the present invention is to provide an electrical connection structure that does not require a large force.
[0006]
[Means for Solving the Problems]
The structure of the present invention is an electrical connection structure in which a first lead member and a second lead member are detachably connected and electrically connected, wherein the first lead member includes a first lead plate made of metal. Wherein the first lead plate has a groove extending inward from one side thereof, the second lead member has a metal second lead plate, and a protrusion is provided at one end of the second lead plate. In the state where the first lead member and the second lead member are connected, the protrusion of the second lead plate comes into contact with the protrusion pressed by the groove of the first lead plate, When connecting the first lead member and the second lead member, the protrusion of the second lead plate enters the groove from one side of the first lead plate.
[0007]
Further, the configuration of the present invention is an electrical connection structure in which a first lead member and a second lead member are detachably connected and electrically connected, wherein the first lead member is a first lead made of metal. The first lead plate has a groove portion whose depth decreases as it goes inward from one side of the first lead plate, and the second lead member is folded into a substantially U-shape in cross section in order to obtain an elastic force. A second lead plate made of a bent metal, a protrusion provided on one end side of the second lead plate, and in a state where the first lead member and the second lead member are connected, the second lead plate is connected to the second lead plate. When the projection of the two-lead plate comes into contact with the groove of the first lead plate while being pressed, and when the first lead member and the second lead member are connected, the projection comes into contact with the groove. In this state, the protrusion slides in the direction in which the groove becomes shallow, and connection is established. Characterized in that it is completion.
[0008]
Further, the configuration of the present invention is an electrical connection structure in which the first lead member and the second lead member are detachably connected and electrically connected, and the first lead member is made of a first metal member. The first lead plate has a V-shaped groove formed in two cross-sections, the depth of which decreases as it goes inward from one side, and the second lead member is made of metal. The second lead plate is provided with a curved projection on one end side of the second lead plate, and in a state where the first lead member and the second lead member are connected, the second lead When the projection of the plate comes into contact with the side surfaces of the groove of the first lead plate while being pressed, and connects the first lead member and the second lead member, the projection is in contact with the groove portion. In the contact state, the protrusion slides in the direction in which the groove becomes shallow. Characterized in that the connection is completed.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. In the electrical connection structure of the present embodiment, the first lead member 1 and the second lead member 3 are detachably connected to each other and are electrically connected.
[0010]
In the first lead member 1, a pair of first lead plates 10, 10 are held by a first holding member 20.
[0011]
The first lead plate 10 is made of a metal plated on a copper surface, has a substantially elongated rectangular shape, and has a V-shaped cross-sectional groove portion 11 whose depth becomes shallower as it proceeds upward, which is inside the lower side. I have. Both sides of the V-shaped groove 11 are side surfaces 11a, 11a. In addition, on the lower surface near the groove 11 is formed an inclined surface 12 so that the thickness of the first lead plate 10 gradually decreases. On the upper side of the first lead plate 10, a locking piece 13 is formed by punching and bending while leaving one side of a small rectangular shape. The locking piece 13 holds the tip of a separately prepared lead wire 5 (indicated by a dotted line in FIG. 3). This lead wire 5 is used to supply power to the load.
[0012]
The first holding member 20 is made of a resin material, and has a quadrangular prism-shaped outer shape having a connecting projection 21 on the lower side. Further, the first lead plate 10 has fitting holes 22, 22 into which the first lead plate 10 is inserted and fitted. As shown in FIG. 3, when the first lead plate 10 is inserted, the first lead plate 10 is held in the fitting hole 22, and the groove of the first lead plate 10 is provided inside the connection protrusion 21. 11 appears.
[0013]
On the other hand, in the second lead member 3, a pair of second lead plates 30, 30 are held by the second holding member 20.
[0014]
The second lead plate 30 is made of a metal plated on the surface of copper. The second lead plate 30 is formed by bending a substantially elongated plate in the middle to have a substantially U-shape in cross section, thereby providing elasticity. An end 32 is formed. Therefore, the elastic end 32 has an elastic force in the horizontal direction on the paper surface of FIG. The elastic end 32 has a substantially hemispherical projection 32a formed by being pushed out from the back side. The holding portion 31 has a wide fitting portion 31a and a substantially hemispherical fitting protrusion 33 formed by pushing out the second lead plate 30 located below the fitting portion 31a from the back side. And a retaining piece 34 formed by punching and bending, leaving one side of a small rectangular shape below.
[0015]
The second holding member 40 is made of a resin material, and has a substantially quadrangular prism shape having a hollow insertion port 42 on the upper side. Further, grooves 41 for holding the second lead plate 30 are provided inside the second holding member 40. The groove 41 includes a narrow groove opening 41a facing the hollow portion 42 in the second holding member 40, and a wide rear portion 41b located on the rear side, and the width of the rear portion 41b in the width direction is provided. Both ends are fitting portions 41c. Further, a bottom portion 43 is provided below the insertion opening 42, and the groove 41 extends and penetrates through the bottom portion 43.
[0016]
As shown in FIG. 3, when the second lead plate 30 having the above-described structure is slid from above into the deep side portion 41 b of the groove 41 of the second holding member 40, the retaining piece is inserted into the groove 41. 34 passes through in a pushed back state, penetrates to the bottom surface side, the retaining piece 34 is restored to an upright state, and its tip abuts on the bottom surface of the bottom portion 43. In this state, the second lead plate 30 It does not come off upward. In the inserted state, the fitting projection 33 is fitted in the groove 41 passing through the bottom 43, and both ends of the fitting portion 31 a of the second lead plate 30 are By being fitted to the fitting portions 41c at both ends of the side portion 41b, it is surely held. In the inserted state, a separately prepared lead wire (not shown) having a power supply function is connected and fixed to the lower end of the second lead plate 30 by soldering or the like.
[0017]
Next, a state in which the first lead member 1 and the second lead member 2 are connected will be described. As shown in FIG. 3, the connection is made by inserting the connection protrusion 21 of the first holding member 20 of the first lead member 1 into the insertion opening 42 of the second holding member 40 of the second lead member 3. Further, the first lead member 1 and the second lead member 2 can be removed from the connected state by separating the first lead member 1 and the second lead member 2 in the vertical direction in FIG. In the vertical movement of the connection / disconnection operation, the substantially hemispherical top of the projection 32 a on the second lead plate 30 moves on the center line of the first lead plate 10. The substantially hemispherical top of the projection 32a moves up and down on the valley line where the side surfaces 11a of the V-shaped groove 11 intersect.
[0018]
Here, as shown in FIG. 4B, in the middle of the insertion and connection operation, the projection 32 a of the elastic end 32 of the second lead plate 30 is relatively loosely pressed by the groove 11 of the first lead plate 10. However, as shown in FIGS. 4D and 4E, as the insertion proceeds, the depth of the groove 11 becomes shallower, so that the second lead plate 30 is more bent. The restoring force of the elastic end 32 increases, and the insertion and connection are completed and connected in the state of FIG. As described above, since the depth of the groove portion 11 becomes shallow, when the protrusion 32a located at the elastic end 32 slides while abutting, it is gradually pressed strongly by the groove portion 11, so that the contact becomes reliable. The electrical connection is stable. Further, since the projection 32a and the groove 11 which comes into contact with the projection 32a are gradually pressed strongly and rub against each other, they slide while rubbing off the insulating film formed on both metal surfaces. Function as a contact, the electric connection is stabilized, and a stable electric connection can be obtained even after long-term use and many attachment / detachment operations.
[0019]
Further, as shown in FIGS. 4C and 4E, a substantially hemispherical projection 32a and both side surfaces 11a, 11a of the V-shaped groove 11 or upper end portions 11at of the side surfaces (FIG. 4E) ) Contact at two places, so that an electrical connection can be obtained more reliably (in this specification, the upper end portions 11at of both side surfaces 11a, 11a also mean a part of the side surface 11a). ing). Here, the projection 32a is substantially hemispherical, but is not limited to a substantially hemispherical shape as long as it can be contacted at two places as shown in FIGS. Good
[0020]
Next, the features of the above embodiment will be described using a comparative example.
[0021]
First, it will be described that the present embodiment does not require a large force for the insertion and connection operations. FIG. 4A is a cross-sectional view of an essential part showing an early stage of the connection operation of the present embodiment, and shows a state where the elastic end 32 of the bent second lead plate 30 is released from pressing. 4A, the second lead plate 30 moves upward (the moving direction is indicated by an arrow in the figure), and the elastic end 32 and the protrusion 32a hit the lower side of the first lead plate 100, and the protrusion is formed. 32 comes into contact with the groove portion 11 and enters the groove portion 11. The force required for the connection operation in this case was 6.7 N as measured.
[0022]
FIG. 5A is a cross-sectional view of a main part showing an initial stage of a connection operation of a comparative example corresponding to FIG. The difference from this embodiment is that only the groove 11 is not formed in the first lead plate 10, and the other points are the same. In the comparative example of FIG. 5, the description is omitted using the same reference numerals as in the present embodiment. As can be seen from FIG. 5A, at the initial stage of the connection operation, the elastic end 32 of the bent second lead plate 30 of the comparative example is in a state where the pressing is released. 5A, the second lead plate 30 moves upward (the moving direction is indicated by an arrow in the figure), and the elastic end 32 and the projection 32a are moved to the lower side of the first lead plate 100 of the comparative example. In particular, the vehicle rides over the right corner of the lower side in FIG. The force required for the connection operation of this comparative example was 7.5 N as measured.
[0023]
As described above, in the comparative example of FIG. 5A, a large force is required when the projection 32a gets over the lower right corner, but in this embodiment, a large force is required when the projection gets over the comparative example. Since the right corner of the lower side is a gentle corner in the groove 11, it was confirmed that the force required for the connection operation was small.
[0024]
Next, it will be described that the present embodiment does not greatly increase the force required at the time of the connection operation even by long-term use and many attachment / detachment operations. In this embodiment, as shown in FIGS. 4B and 4C, when the projection 32a is located in the deep portion of the groove 11 during the connection operation, the substantially hemispherical projection 32a In the vicinity of the side part distant from the top part, both sides 11a, 11a of the groove part 11 having a V-shaped cross section are contacted at two places. Subsequently, at the time of completion of the connection operation, as shown in FIGS. 4D and 4E, the substantially hemispherical projection 32a is near the top thereof on both sides of the V-shaped groove 11 in cross section. The upper end 11at of the surface 11 (see FIG. 4 (e)) comes into contact at two places (in this specification, the upper end 11at of both side surfaces 11a, 11a also has a part of the side surface 11a). Means). As described above, when the projection 32a slides in the direction in which the groove 11 becomes shallow and connection is completed, the portions of the protrusion 32a that come into contact with and contact with both side surfaces 11a, 11a of the groove 11 also move. Even when the projection 32a is used and a large number of attachment / detachment operations are performed, it is unlikely that the projection 32a will come into contact with one portion and become worn, resulting in a surface contact state. Therefore, the force required at the time of the connection operation does not greatly increase. In the present embodiment, the force required for the connection operation at the start of use is actually measured at 6.7 N, and the force required for the connection operation after 2500 times of attachment / detachment operations is measured at 5.5 N (vs. Value 82%). The connection resistance between the first lead member 1 and the second lead member 3 at the start of use is 4.16 mΩ, and the connection resistance after repeating the attachment / detachment operation 2500 times is 4.54 mΩ (compared to the initial value of 109%). )Met.
[0025]
In addition, in the comparative example, as shown in FIGS. 5B and 5C, only one portion near the inclined surface 12 and the top of the projection 32a slides, so that long-term use and a large number of attachments and detachments are possible. Even in the operation, one portion comes into contact and is worn to be in a surface contact state, the frictional force at the time of sliding increases, and a large force is required at the time of the connection operation. In the comparative example, the force required for the connection operation at the start of use was actually measured at 7.5 N, and the force required for the connection operation after 2500 times of attachment / detachment operations was actually measured at 18.5 N (vs. the initial value). 247%). Further, the connection resistance between the first lead member 1 and the second lead member 3 at the start of use is 5.99 mΩ, and the connection resistance after repeating the attaching / detaching operation 2500 times is 5.80 mΩ (compared to the initial value of 109%). )Met.
[0026]
As described above, in this example, it was confirmed that the force required for the connection operation did not greatly increase even after long-term use and many attachment / detachment operations, as compared with the comparative example. In the present embodiment, as can be seen from FIG. 4, the substantially hemispherical projection 32a comes into contact with the two side surfaces 11a, 11a of the groove portion 11 having a V-shaped cross section. The resistance is small, contact can be made more reliably, and wear can be reduced.
[0027]
【The invention's effect】
According to the first aspect of the present invention, when the first lead member and the second lead member are connected, the protrusion of the second lead plate enters the groove from one side of the first lead plate, so that the protrusion collides with one side. Force can be reduced. On the other hand, in the comparative example having no groove as described above, the projection collides with one side of the lead plate, and a large force is required at the time of the connection operation.
[0028]
According to the second aspect of the present invention, the protrusion is slid in the direction in which the groove becomes shallow, and the connection is completed. As a result, the second lead plate is more bent as the connection is completed. Therefore, the restoring force of the second lead plate having the protrusion increases. Therefore, when the connection is completed, the projection is pressed against the groove with a large restoring force, and the electrical connection can be reliably obtained.
[0029]
According to the third aspect of the present invention, the substantially hemispherical projection is brought into contact with a V-shaped cross-sectional groove formed by two side surfaces, the depth of which decreases as it goes inward from one side. Since the connection is completed by sliding in the direction in which the groove portion becomes shallower, the two portions of the protrusion that come into contact with both side surfaces of the groove portion also move by the time the connection operation proceeds and is completed. Therefore, by the long-term use and a large number of attachment / detachment operations, the connection can be easily performed without the need for a large force at the time of the connection operation due to the sliding of one portion as described in the comparative example. . Further, in the present invention, since the protrusion and the groove come into contact at two places, the contact resistance is small and the contact is more reliable as compared with the case where the protrusion and the groove come into contact at one place as in the above-described comparative example. And wear can be reduced.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing a first lead member according to one embodiment of the present invention.
FIG. 2 is an exploded perspective view showing a second lead member according to one embodiment of the present invention.
FIG. 3 is a cross-sectional view of a connection state according to an embodiment of the present invention. (Corresponding to the cross section taken along line AA in FIG. 1 and the cross section taken along line AA in FIG. 2)
4 is a cross-sectional view of a main part illustrating a state of insertion and connection according to an embodiment of the present invention (corresponding to a cross section along the same line as FIG. 3), and FIG. , (B) is a sectional view showing the middle of the connecting operation, (c) is a sectional view taken along the line AA in (b), (d) is a sectional view showing the completion of the connecting operation, and (e) is ( It is the sectional view on the AA line in d).
5A and 5B are cross-sectional views of main parts illustrating a state of insertion and connection of a comparative example (corresponding to a cross section of the same line as in FIG. 4), wherein FIG. Is a cross-sectional view showing the middle of the connection operation, and (c) is a cross-sectional view showing the completion of the connection operation.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 first lead member 3 second lead member 10 first lead plate 11 groove 11 a side surface 20 first holding member 30 second lead plate 32 elastic end 32 projection 32 a
40 Second holding member

Claims

An electrical connection structure in which a first lead member and a second lead member are detachably connected and electrically connected,
The first lead member has a first lead plate made of metal, and the first lead plate has a groove that goes inward from one side thereof,
The second lead member has a second lead plate made of metal, and has a protrusion on one end side of the second lead plate.
In a state where the first lead member and the second lead member are connected, the protrusion of the second lead plate comes into contact with the protrusion pressed by the groove of the first lead plate,
The electrical connection structure according to claim 1, wherein, when connecting the first lead member and the second lead member, the protrusion of the second lead plate enters the groove from one side of the first lead plate.

An electrical connection structure in which a first lead member and a second lead member are detachably connected and electrically connected,
The first lead member has a first lead plate made of metal, and the first lead plate has a groove portion whose depth decreases as it goes inward from one side thereof,
The second lead member has a metal second lead plate bent in a substantially U shape in cross section in order to obtain an elastic force, and has a protrusion on one end side of the second lead plate.
In a state where the first lead member and the second lead member are connected, the protrusion of the second lead plate comes into contact with the protrusion pressed by the groove of the first lead plate,
When connecting the first lead member and the second lead member, the protrusion slides in the direction in which the groove becomes shallow while the protrusion is in contact with the groove, and the connection is completed. An electrical connection structure, characterized by:

An electrical connection structure in which a first lead member and a second lead member are detachably connected and electrically connected,
The first lead member has a first lead plate made of a metal, and the first lead plate has a V-shaped cross-sectional groove formed of two side surfaces whose depth decreases as going inward from one side thereof. Have
The second lead member has a metal second lead plate, and has a curved projection on one end side of the second lead plate,
In a state where the first lead member and the second lead member are connected, the protrusions of the second lead plate come into contact with the two side surfaces of the groove of the first lead plate while being pressed. ,
When connecting the first lead member and the second lead member,
The electrical connection structure, wherein the protrusion is slid in a direction in which the groove becomes shallow while the protrusion is in contact with the groove, and the connection is completed.