JP2004207058A

JP2004207058A - Push-button switch

Info

Publication number: JP2004207058A
Application number: JP2002375277A
Authority: JP
Inventors: Takeshi Ozawa; 健小澤
Original assignee: Alps Electric Co Ltd
Current assignee: Alps Alpine Co Ltd
Priority date: 2002-12-25
Filing date: 2002-12-25
Publication date: 2004-07-22
Anticipated expiration: 2022-12-25
Also published as: JP4090868B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a push-button switch with a good material utilization efficiency, low cost, and easy to manufacture. <P>SOLUTION: Of the push-button switch, by arranging a first fixed contact point 2 of a first contact part 2a in the vicinity of an outer periphery of an opening 1f, and by forming a first contact part 2a, a first coupling part 2b, and a first terminal part 2c connected to the first coupling part 2b so as to extend in a linear direction (in a direction of a line S2), the first and second contact parts 2a, 3a of the first and second fixed contact points 2, 3 can be arranged on a line S1 crossing the line S2, and the length of the first contact part 2a of the first contact point 2 on the metal plate 11 in longitudinal direction can be made shorter than before, and the push-button switch with a good material utilization efficiency can be obtained at low cost. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は種々の電子機器のプリント基板に面実装によって取り付けられるものに使用して好適な押釦スイッチに関する。
【０００２】
【従来の技術】
従来の押釦スイッチの図面を説明すると、図１２は従来の押釦スイッチの側面図、図１３は従来の押釦スイッチの要部断面図、図１４は従来の押釦スイッチに係り、固定接点とハウジングの製造の第１工程を示す説明図、図１５は従来の押釦スイッチに係り、固定接点とハウジングの製造の第２工程を示す説明図である。
【０００３】
次に、従来の押釦スイッチの構成を図１２、図１３に基づいて説明すると、合成樹脂の成型品からなるハウジング５１は、箱形をなし、底壁５１ａと、この底壁５１ａの四方から上方に延びる側壁５１ｂと、上方の中央部に設けられた開口部５１ｃを有する。
【０００４】
金属板からなる第１固定接点５２は、特に図１４に示すように、間隔をおいて配置された一対の接点部５２ａと、一対の接点部５２ａに連結された一対の連結部５２ｂと、この一対の連結部５２ｂから両側に延びる一対の端子部５２ｃを有する。
【０００５】
また、金属板からなる第２固定接点５３は、特に図１４に示すように、一対の接点部５２ａ間に位置する接点部５３ａと、この接点部５３ａに連結された連結部５３ｂと、この連結部５３ｂから両側に延びる一対の端子部５３ｃを有する。
【０００６】
そして、第１，第２の固定接点５２，５３の接点部５２ａ、５３ａは、端子部５２ｃ、５３ｃの間に位置し、且つ、端子部５２ｃ、５３ｃの延びる方向の直線Ｓ５、Ｓ６と同一方向の直線Ｓ７上に配置されている。
【０００７】
また、接点部５２ａと端子部５２ｃを繋ぐ連結部５２ｂは、接点部５２ａから直線Ｓ５に対して直交する方向に延びる部分と、直線Ｓ５の方向に延びる部分とで構成されると共に、接点部５３ａと端子部５３ｃを繋ぐ連結部５３ｂは、接点部５３ａから直線Ｓ６に対して直交する方向に延びる部分と、直線Ｓ６の方向に延びる部分とで構成されている。
【０００８】
そして、この第１，第２の固定接点５２，５３は、連結部５２ｂ、５３ｂがハウジング５１に埋設されて取り付けられ、接点部５２ａ、５３ａは、底壁５１ａ上で、開口部５１ｃ内に露出すると共に、端子部５２ｃ、５３ｃは、ハウジング１外に突出して、下方に折り曲げられている。
【０００９】
また、ここでは図示しないが、開口部１ｃ内には可動接点が収納され、ハウジング１に対して移動可能取り付けられた操作部材によって、可動接点が操作されて、第１，第２の固定接点５２，５３間をＯＮ、ＯＦＦするようになっている。
【００１０】
次に、このような構成を有する従来の押釦スイッチに係る固定接点とハウジングの製造方法を図１４，図１５に基づいて説明すると、先ず、図１４に示す第１工程で、フープ状の金属板５５は、打ち抜き加工が施される。
【００１１】
すると、図１４に示すように、第１の固定接点５２は、金属板５５の一側部側に形成されると共に、第２の固定接点５３は、金属板５５の他側部側に形成される。
【００１２】
そして、第１，第２の固定接点５２，５３は、接点部５２ａ、５３ａが金属板５５の中央部の長手方向（直線Ｓ７）に一列に配置された状態で形成される。
また、連結部５２ｂ、５３ｂは、直線Ｓ７と直交する短手方向と、長手方向に延びて、一対の端子部５２ｃ、５３ｃに繋がっている。
【００１３】
即ち、一対の端子部５２ｃと５３ｃは、金属板５５の長手方向に延びて、互いに対向するように配置されると共に、接点部５２ａ、５３ａが金属板５５の中央部で長手方向（直線Ｓ７）に延びて、一対の端子部５２ｃ、５３ｃと平行に配置されている。
【００１４】
また、端子部５２ｃ、５３ｃの両端部は、金属板５５に連結されており、次に、このような構成を有する金属板５５は、送り孔５６を利用して、順次成型金型（図示せず）に送られ、図１５に示す第２工程で、金属板５５に対して、成形加工によって、ハウジング５１を形成する。
この時、接点部５２ａの側面、及び上面を成形金型によって取り囲んで、接点面に樹脂が流入するのを防止する。
【００１５】
すると、第１，第２の固定接点５２，５３の連結部５２ｂ、５３ｂが底壁５１ａに埋設され、接点部５３ａが開口部５１ｃの中央部に露出すると共に、一対の接点部５２ａが接点部３ａを挟んで、開口部１ｃの外周近傍に露出し、且つ、端子部５２ｃ、５３ｃがハウジング５１外に突出した状態となる。
また、上述した成形金型での接点面上への樹脂の流入防止のために、接点部５２ａの側面には、金型が押し当てられるための幅分、金属板５５をその長手方向に設ける必要がある。
【００１６】
次に、図１５に示す二点鎖線Ｚ１の位置で切断して、金属板５５から第１，第２の固定接点５２，５３を切り離した後、端子部５２ｃ、５３ｃを折り曲げられると、その製造が完了する。（例えば、特許文献１参照）
【００１７】
【特許文献１】
特許第２７９８８１４号公報
【００１８】
【発明が解決しようとする課題】
従来の押釦スイッチは、第１の固定接点５２の一対の接点部５２ａが接点部５３ａを挟んで、端子部５２ｃの延びる方向（直線Ｓ６）と平行な直線Ｓ７上に形成されるため、金属板５５が長手方向に長くなって、材料取りが悪く、コスト高になるという問題がある。
また、第１の固定接点５２の一対の接点部５２ａと端子部５２ｃを繋ぐ連結部５２ｂは、接点部５２ａから直線Ｓ５に対して直交する方向に延びる部分と、直線Ｓ５の方向に延びる部分とで構成されているため、連結部５２ｂが長くなって、材料取りが悪く、コスト高になると共に、その構成が複雑で、成形金型の製造が面倒になるという問題がある。
【００１９】
そこで、本発明は材料取りが良く、安価で、製造の容易な押釦スイッチを提供することを目的とする。
【００２０】
【課題を解決するための手段】
上記課題を解決するための第１の解決手段として、開口部を有する絶縁材からなるハウジングと、このハウジングに埋設して取り付けられた第１，第２の固定接点と、前記開口部内に収納された可動接点と、前記開口部に移動可能に取り付けられ、前記可動接点を操作する操作部とを備え、前記第１の固定接点は、前記開口部内で露出する第１の接点部と、この第１の接点部に連結され、前記ハウジングに埋設された第１の連結部と、この第１の連結部に繋がり、前記ハウジング外に突出する第１の端子部を有し、前記第２の固定接点は、前記開口部内で露出する第２の接点部と、この第２の接点部に連結され、前記ハウジングに埋設された第２の連結部と、この第２の連結部に繋がり、前記ハウジング外に突出する第２の端子部を有し、前記第１の固定接点は、前記第１の接点部が前記開口部の外周近傍に配置され、前記第１の接点部から前記第１の連結部、及びこの第１の連結部に繋がった前記第１の端子部が直線方向に延びて形成され、前記第２の固定接点の第２の接点部が前記開口部の中央部に配置された構成とした。
【００２１】
また、第２の解決手段として、前記第２の固定接点は、前記第２の接点部から前記第２の連結部、及びこの第２の連結部に繋がった前記第２の端子部が直線方向に延びて形成され、前記第２の連結部、及び前記第２の端子部のそれぞれが前記第１の連結部、及び前記第１の端子部のそれぞれに対して平行に配置された構成とした。
【００２２】
また、第３の解決手段として、前記第３の固定接点を有し、この第３の固定接点は、前記開口部の外周近傍で露出した第３の接点部と、この第３の接点部に連結され、前記ハウジングに埋設された第３の連結部と、この第３の連結部に繋がり、前記ハウジング外に突出する第３の端子部を有し、前記第３の固定接点は、前記第２の固定接点を挟んで前記第１の固定接点と対向する位置に配置され、前記第３の連結部、及び前記第３の端子部のそれぞれが前記第１の連結部、及び前記第１の端子部のそれぞれに対して平行に配置された構成とした。
【００２３】
また、第４の解決手段として、前記第１，第３の固定接点が第４の連結部によって繋がれた構成とした。
また、第５の解決手段として、前記第２の固定接点の前記第２の端子部は、前記第２の接点部を間にして、前記第１の端子部と平行に配置された構成とした。また、第６の解決手段として、前記端子部は、前記ハウジングの前記端子部引出面に沿って折り曲げられた構成とした。
【００２４】
【発明の実施の形態】
本発明の押釦スイッチの図面を説明すると、図１は本発明の押釦スイッチの第１実施例に係る正面図、図２は本発明の押釦スイッチの第１実施例に係る側面図、図３は本発明の押釦スイッチの第１実施例に係る上面図、図４は本発明の押釦スイッチの第１実施例に係る下面図である。
【００２５】
また、図５は本発明の押釦スイッチの第１実施例に係る要部断面図、図６は図５のＡ部分における拡大断面図、図７は本発明の押釦スイッチの第１実施例に係り、その取付状態を示す説明図である。
【００２６】
また、図８は本発明の押釦スイッチの第１実施例に係り、固定接点とハウジングの製造の第１工程を示す説明図、図９は本発明の押釦スイッチの第１実施例に係り、固定接点とハウジングの製造の第２工程を示す説明図、図１０は本発明の押釦スイッチの第２実施例に係り、固定接点とハウジングの製造の第１工程を示す説明図、図１１は本発明の押釦スイッチの第２実施例に係り、固定接点とハウジングの製造の第２工程を示す説明図である。
【００２７】
次に、本発明の押釦スイッチの第１実施例の構成を図１〜図７に基づいて説明すると、合成樹脂の成型品からなるハウジング１は、箱形をなし、側方に位置する前面１ａと、前面１ａから後方に延びる底壁１ｂと、この底壁１ｂの端部から上方に延びる一対の側壁１ｃと、この一対の側壁１ｃ間に設けられた上壁１ｄと、後面を塞ぐ後壁１ｅと、前面１ａの中央部に設けられた開口部１ｆと、底壁１ｂの前方下面に設けられた凹部１ｇと、前面１に設けられた突起１ｈを有する。また、前面１ａ、底壁１ｂ、及び側壁１ｃに面する角部には、切り欠かれた段落ち部１ｊが形成されている。
【００２８】
金属板からなる第１，第２、第３の固定接点２，３、４のそれぞれは、特に図８に示すように、前方に突出した第１の接点部２ａ、第２の接点部３ａ、第３の接点部４ａと、この第１，第２，第３の接点部２ａ、３ａ、４ａのそれぞれに連結された第１の連結部２ｂ、第２の連結部３ｂ、第３の連結部４ｂと、この第１，第２，第３の連結部２ｂ、３ｂ、４ｂのそれぞれに繋がった第１の端子部２ｃ、第２の端子部３ｃ、第３の端子部４ｃを有する。
【００２９】
そして、第１，第２，第３の固定接点２，３，４の第１，第２，第３の接点部２ａ、３ａ、４ａは、図８に示すように、直線Ｓ１上に配置されると共に、第１，第２，第３の接点部２ａ、３ａ、４ａのそれぞれから第１，第２，第３の連結部２ｂ、３ｂ、４ｂ、及び第１，第２，第３の端子部２ｃ、３ｃ、４ｃが直線Ｓ１と直交する直線Ｓ２，Ｓ３，Ｓ４方向に延びて配置されている。
【００３０】
その結果、第１，第２，第３の連結部２ｂ、３ｂ、４ｂ、及び第１，第２，第３の端子部２ｃ、３ｃ、４ｃは、互いに平行な状態で配置されている。
この実施例では、第１，第３の固定接点２，４が第４の連結部Ｒ１で繋がれて、各々をコモン接点として使用することにより、スイッチとしての信頼性を向上させているが、この第４の連結部Ｒ１を無くしても良い。
【００３１】
また、第１，第２，第３の固定接点２，３，４は、第１，第２，第３の連結部２ｂ、３ｂ、４ｂ、及び第４の連結部Ｒ１が後壁１ｅに埋設して取り付けられ、第２の接点部３ａが開口部１ｆの中央部（後壁１ｅの中央部）に露出すると共に、第１，第３の接点部２ａ、４ａが第２の接点部３ａを挟んで、開口部１ｆの外周近傍（後壁１ｅの外周）に露出している。
【００３２】
また、第１，第２，第３の端子部２ｃ、３ｃ、４ｃは、ハウジング１の底壁１ｂから外方に突出し、それぞれが端子部引出面である底壁１ｂの下面に沿って後方に折り曲げられており、折り曲げられた第１，第２，第３の端子部２ｃ、３ｃ、４ｃの下面は、底壁１ｂの下面よりも下方に位置した状態となっている。（特に図６参照）
【００３３】
なお、この実施例では、３個の第１，第２，第３の固定接点２，３，４を用いたもので説明したが、２個の第１，第２の固定接点２，３，或いは第２，第３の固定接点３，４で構成しても良い。
【００３４】
ドーム状のバネ性ある金属板等からなる可動接点５は、ハウジング１の開口部１ｆ内に収納され、図５に示すように、中央部が第２の接点部３ａに対向し、外周部が第１，第３の接点部２ａ、４ａに接触した状態で配置されている。
【００３５】
金属板からなる全体が略コ字状のカバー６は、中央部に孔６ａを有する板状の前面板６ｂと、この前面板６ｂの両端から直角に後方に折り曲げられた一対の側面板６ｃと、一対の側面板６ｃの下端から下方に突出する突出片６ｄと、前面板６ｂの対向する下方隅部において、後方に折り曲げられた一対の折り曲げ片６ｅと、この折り曲げ片６ｅに対向する位置で、一対の側面板６ｃに設けられた切り欠き部６ｆと、前面板６ｂの隅部に設けられた小孔６ｇを有する。
【００３６】
このカバー６は、前面板６ｂで開口部１ｆを塞ぐように、前面板６ｂがハウジング１の前面１ａに配置され、且つ、小孔６ｇにハウジング１の突起１ｈが挿通され、突起１ｈの先端部を熱カシメする等して、ハウジング１に取り付けられる。
【００３７】
そして、カバー６がハウジング１に取り付けられた際、折り曲げ片６ｅは、凹部１ｇ内に配置され、折り曲げ片６ｅの下面は、底壁１ｂの下面よりも下方に位置した状態となっていると共に、第１，第２，第３の端子部２ｃ、３ｃ、４ｃの下面と面一状態となっている。
また、この時、折り曲げ片６ｅと突出片６ｄの裏面が対向するハウジング１の両角部には、段落ち部１ｊが形成されていることから実装面側のカバー６と、ハウジング１の前面１ａとの合わせ目に空隙が形成される。
【００３８】
また、カバー６がハウジング１に取り付けられた際、一対の側面板６ｃは、側壁１ｃの外周部を覆うように配置され、突出片６ｄが折り曲げ片６ｅの下面を越えて、下方に突出した状態になると共に、切り欠き部６ｆを通して、側面から折り曲げ片６ｅが目視できるようになっている。
【００３９】
なお、この実施例では、折り曲げ片６ｅが前面板６ｂの下方隅部に一対設けたもので説明したが、前面板６ｂの下部の任意の箇所において、折り曲げ片６ｅを１個、或いは２個以上設けても良い。
【００４０】
合成樹脂の成型品からなる押釦である操作部材７は、操作部７ａと、この操作部７ａの後部に設けられた鍔部７ｂと、操作部７ａの中央部から後方に突出する押圧部７ｃを有し、この操作部材７は、鍔部７ｂと押圧部７ｃが開口部１ｆ内に収納され、操作部７ａが孔６ａから外部に突出ようにして、ハウジング１に対して前後に移動可能に取り付けられている。
そして、このような構成を有する本発明の押釦スイッチは、例えば、横寸法が約４．５ｍｍ、高さ寸法が約３．５ｍｍと極めて小く、超小型のもので形成されている。
【００４１】
このような構成を有する本発明の押釦スイッチは、図７に示すように、ハウジング１の底壁１ｂの下面側をプリント基板８に対向させ、第１，第２，第３の端子部２ｃ、３ｃ、４ｃと折り曲げ片６ｅをプリント基板８上に載置し、第１，第２，第３の端子部２ｃ、３ｃ、４ｃと折り曲げ片６ｅがプリント基板８上に設けられた導電パターン（図示せず）に半田９付けされて取り付けられて、押釦スイッチがプリント基板８に面実装される。
この時、折り曲げ片６ｅは、ハウジング１の前面１ａに面しない外側の折り曲げ角部を利用して、半田付け部が形成されて、折り曲げ片６ｅの表面側のみが半田付けされるものである。
【００４２】
そして、折り曲げ片６ｅに半田９付けすると、折り曲げ片６ｅでハウジング１の前面１ａを覆った状態となり、従って、フラックスが開口部１ｆ内に侵入し難くなる。
更に、切り欠き部６ｆ、及びハウジング１の段落ち部１ｊによって、実装面でのカバー６とハウジング１の合わせ目に空隙が形成されているので、フラックスの沿面距離を大きく確保できる。
【００４３】
また、押釦スイッチの面実装時、折り曲げ片６ｅの下端と第１，第２，第３の端子部２ｃ、３ｃ、４ｃの下面とがハウジング１の下面（底壁１ｂ）よりも突出して、ハウジング１の下面（底壁１ｂ）がプリント基板８から浮いた状態となっているため、フラックスがハウジング１の外周面に伝わり難くなって、フラックスが開口部１ｆ内に侵入し難くなると共に、リフロー炉内に通した際に、半田の溶融時間差によって、ハウジング１の下面を中心としてスイッチが傾くことがない。
【００４４】
更に、押釦スイッチの面実装時、突出片６ｄは、プリント基板８の孔８ａに挿通され、これによって、プリント基板８に対する押釦スイッチの位置決めを確実に行うようになっている。
【００４５】
そして、操作部材７の操作部７ａがプリント基板８と平行な方向に押圧されると、ドーム状の可動接点５が押されて、可動接点５の中央部が反転動作する。
その結果、可動接点５の外周部が第１，第３の接点部２ａ、４ａに接触した状態で、中央部が移動して第２の接点部３ａに接触して、第１，第３の接点部２ａ、４ａと第２の接点部３ａとの間がＯＮ状態となる。
【００４６】
また、操作部７ａの押圧を解除すると、可動接点５は、自己のバネ性で元の状態に復帰し、これによって、操作部材７も元の状態に戻されると共に、第１，第３の接点部２ａ、４ａと第２の接点部３ａとの間がＯＦＦ状態となる。
【００４７】
次に、本発明の押釦スイッチの第１実施例に係る固定接点とハウジングの製造方法を図８，図９に基づいて説明すると、先ず、図８に示す第１工程で、フープ状の金属板１１は、打ち抜きと突き出し加工が施される。
【００４８】
すると、図８に示すように、第１，第２，第３の固定接点２，３，４は、紙面手前方向に突き出された第１、第２，第３の接点部２ａ、３ａ、４ａが金属板１１の長手方向と直交する短手方向（直線Ｓ１）に一列に配置された状態で、互いに短手方向に並列状態に形成される。
【００４９】
その結果、第１，第２，第３の接点部２ａ、３ａ、４ａのそれぞれから第１，第２，第３の連結部２ｂ、３ｂ、４ｂ、及び第１，第２，第３の端子部２ｃ、３ｃ、４ｃが金属板１１の長手方向（直線Ｓ２，Ｓ３，Ｓ４方向）に平行な状態で延びて配置されている。
【００５０】
即ち、第１、第２，第３の接点部２ａ、３ａ、４ａが金属板１１の長手方向と直交する短手方向（直線Ｓ１）に一列に配置されると、第１、第２，第３の接点部が金属板１１の長手方向に配列されたものに比して、金属板１１を長手方向に短くできて、材料取りが良く、安価な固定接点構造が得られる。
【００５１】
また、第１，第２，第３の端子部２ｃ、３ｃ、４ｃの端部は、金属板１１に連結されると共に、第１，第３の接点部２ａ、４ａの他端は、金属板１１の長手方向に延びる一対の繋ぎ部１２によって金属板１１に繋がれており、また、第１，第３の接点部２ａ、４ａは、第４の連結部Ｒ１で繋がれている。
【００５２】
次に、このような構成を有する金属板１１は、送り孔１３を利用して、順次成型金型（図示せず）に送られ、図９に示す第２工程で、金属板１１に対して、成形加工によって、図１〜図７で示す構成を有するハウジング１を形成する。
この時、接点部２ａ、４ａの上面、及び側面を金型で囲んで成形し、接点面上への樹脂流入を防止する必要があるが、そのための金型押し当てスペースを、金属板１１の長手方向と直交する方向に設けることができ、長手方向のハウジング１の幅を小さくでき、金属板１１の材料歩留まりを向上させることができる。
【００５３】
すると、第１，第２，第３の固定接点２，３，４の第１，第２，第３の連結部２ｂ、３ｂ、４ｂ、及び第４の連結部Ｒ１と一部の繋ぎ部１２が後壁１ｅに埋設され、第２の接点部３ａが開口部１ｆの中央部（後壁１ｅの中央部）に露出すると共に、第１，第３の接点部２ａ、４ａが第２の接点部３ａを挟んで、開口部１ｆの外周近傍（後壁１ｅの外周）に露出し、且つ、第１，第２，第３の端子部２ｃ、３ｃ、４ｃ、及び繋ぎ部１２がハウジング１外に突出した状態となる。
なお、このインサート成型工程において、第１，第２，第３の連結部２ｂ、３ｂ、４ｂには、金属板１１を板厚方向に打ち抜いた貫通孔１１ａが形成されており、この貫通孔１１ａ内にも樹脂が流入、固化することから、操作時に、端子の引き抜き方向に大きな力が加わっても、スイッチが脱落することが無く、横押し強度を高めることができる。
【００５４】
次に、図９に示す二点鎖線Ｚ１の位置で切断して、金属板１１から第１，第２，第３の固定接点２，３，４を切り離した後、第１，第２，第３の端子部２ｃ、３ｃ、４ｃがハウジング１の底壁１ｂに沿って折り曲げられると、その製造が完了する。
また、繋ぎ部１２が切断された際、その切断部１２ａは、図３に示すように、上壁１ｄから露出した状態となっている。
【００５５】
また、図１０，図１１は、本発明の押釦スイッチの第２実施例に係る固定接点とハウジングの製造方法を示し、その製造方法を図１０，図１１に基づいて説明すると、先ず、図１０に示す第１工程で、フープ状の金属板１１は、打ち抜きと突き出し加工が施される。
【００５６】
すると、図１０に示すように、第１，第２の固定接点２，３は、突き出された第１、第２の接点部２ａ、３ａが金属板１１の長手方向と直交する短手方向（直線Ｓ１）に一列に配置された状態で、互いに短手方向に並列状態に形成される。
【００５７】
そして、金属板１１の一側部側に形成された第１の固定接点２は、第１の接点部２ａから第１の連結部２ｂ、及び第１の端子部２ｃが金属板１１の長手方向（直線Ｓ２方向）に平行な状態で延びて配置されている。
【００５８】
また、金属板１１の他側部側に形成された第２の固定接点３は、第２の接点部３ａが金属板１１の短手方向の中央部に位置すると共に、第２の端子部３ｃが金属板１１の他側部側で、長手方向（直線Ｓ４方向）に平行な状態で延びて配置され、第２の連結部３ｂが第２の接点部３ａと第２の端子部３ｃに繋がった状態となっている。
【００５９】
即ち、第１、第２の接点部２ａ、３ａが金属板１１の長手方向と直交する短手方向（直線Ｓ１）に一列に配置されると、第１、第２の接点部が金属板１１の長手方向に配列されたものに比して、金属板１１を長手方向に短くできて、材料取りが良く、安価な固定接点構造が得られる。
【００６０】
また、第１，第２の端子部２ｃ、３ｃの端部は、金属板１１に連結されると共に、第１の接点部２ａと第２の端子部３ｃの他端は、金属板１１の長手方向に延びる繋ぎ部１２によって金属板１１に繋がれている。
【００６１】
次に、このような構成を有する金属板１１は、送り孔１３を利用して、順次成型金型（図示せず）に送られ、図１１に示す第２工程で、金属板１１に対して、成形加工によって、図１〜図７で示す構成を有するハウジング１を形成する。
【００６２】
すると、第１，第２の固定接点２，３の第１，第２の連結部２ｂ、３ｂと一部の繋ぎ部１２が後壁１ｅに埋設され、第２の接点部３ａが開口部１ｆの中央部（後壁１ｅの中央部）に露出すると共に、第１の接点部２ａが開口部１ｆの外周近傍（後壁１ｅの外周）に露出し、且つ、第１，第２の端子部２ｃ、３ｃ、及び繋ぎ部１２がハウジング１外に突出した状態となる。
【００６３】
次に、図１１に示す二点鎖線Ｚ１の位置で切断して、金属板１１から第１，第２の固定接点２，３を切り離した後、第１，第２の端子部２ｃ、３ｃがハウジング１の底壁１ｂに沿って折り曲げられると、その製造が完了する。
また、繋ぎ部１２が切断された際、その切断部１２ａは、図３に示すように、上壁１ｄから露出した状態となっている。
【００６４】
また、第２実施例における押釦スイッチの構成は、２個の第１，第２の固定接点２，３を除き、前記第１実施例と同様であり、同一部品に同一番号を付し、ここではその説明を省略する。
【００６５】
【発明の効果】
本発明の押釦スイッチは、開口部を有する絶縁材からなるハウジングと、このハウジングに埋設して取り付けられた第１，第２の固定接点と、開口部内に収納された可動接点と、開口部に移動可能に取り付けられ、可動接点を操作する操作部とを備え、第１の固定接点は、開口部内で露出する第１の接点部と、この第１の接点部に連結され、ハウジングに埋設された第１の連結部と、この第１の連結部に繋がり、ハウジング外に突出する第１の端子部を有し、第２の固定接点は、開口部内で露出する第２の接点部と、この第２の接点部に連結され、ハウジングに埋設された第２の連結部と、この第２の連結部に繋がり、ハウジング外に突出する第２の端子部を有し、第１の固定接点は、第１の接点部が開口部の外周近傍に配置され、第１の接点部から第１の連結部、及びこの第１の連結部に繋がった第１の端子部が直線方向に延びて形成され、第２の固定接点の第２の接点部が開口部の中央部に配置された構成とした。
このように第１の固定接点は、第１の接点部が開口部の外周近傍に配置され、第１の接点部から第１の連結部、及びこの第１の連結部に繋がった第１の端子部が直線方向（直線Ｓ２方向）に延びて形成されると、第１、第２の固定接点の第１、第２の接点部が直線Ｓ２方向に直交する直線Ｓ１上に配置できて、第１の固定接点の第１の接点部は、従来に比して、金属板の長手方向の寸法を小さくできて、材料取りが良く、安価なものが得られる。
また、第１の固定接点２の第１の連結部は、直線状で第１の接点部と第１の端子部を繋ぐため、従来に比して、第１の連結部が短く、材料取りが良く、安価であると共に、その構成が簡素で、成形金型の製造が容易となる。
【００６６】
また、第２の固定接点は、第２の接点部から第２の連結部、及びこの第２の連結部に繋がった第２の端子部が直線方向に延びて形成され、第２の連結部、及び第２の端子部のそれぞれが第１の連結部、及び第１の端子部のそれぞれに対して平行に配置されたため、幅方向に短くできて、材料費が削減できて、安価なものが得られる。
【００６７】
また、第３の固定接点を有し、この第３の固定接点は、開口部の外周近傍で露出した第３の接点部と、この第３の接点部に連結され、ハウジングに埋設された第３の連結部と、この第３の連結部に繋がり、ハウジング外に突出する第３の端子部を有し、第３の固定接点は、第２の固定接点を挟んで第１の固定接点と対向する位置に配置され、第３の連結部、及び第３の端子部のそれぞれが第１の連結部、及び第１の端子部のそれぞれに対して平行に配置されたため、第２，第３の連結部が短く、材料取りが良く、安価であると共に、その構成が簡素で、成形金型の製造が容易となる。
【００６８】
また、第１，第３の固定接点が第４の連結部によって繋がれたため、ハウジングの成形加工時、第４の連結部が支持部となって、精度の良い加工ができる。
【００６９】
また、第２の固定接点の第２の端子部は、第２の接点部を間にして、第１の端子部と平行に配置されたため、第１，第２の端子部間を広くできると共に、材料取りが良く、安価なものが得られる。
【００７０】
また、端子部は、ハウジングの端子部引出面に沿って折り曲げられたため、面実装に対応したものが得られる。
【図面の簡単な説明】
【図１】本発明の押釦スイッチの第１実施例に係る正面図。
【図２】本発明の押釦スイッチの第１実施例に係る側面図。
【図３】本発明の押釦スイッチの第１実施例に係る上面図。
【図４】本発明の押釦スイッチの第１実施例に係る下面図。
【図５】本発明の押釦スイッチの第１実施例に係る要部断面図。
【図６】図５のＡ部分における拡大断面図。
【図７】本発明の押釦スイッチの第１実施例に係り、その取付状態を示す説明図。
【図８】本発明の押釦スイッチの第１実施例に係り、固定接点とハウジングの製造の第１工程を示す説明図。
【図９】本発明の押釦スイッチの第１実施例に係り、固定接点とハウジングの製造の第２工程を示す説明図。
【図１０】本発明の押釦スイッチの第２実施例に係り、固定接点とハウジングの製造の第１工程を示す説明図。
【図１１】本発明の押釦スイッチの第２実施例に係り、固定接点とハウジングの製造の第２工程を示す説明図。
【図１２】従来の押釦スイッチの側面図。
【図１３】従来の押釦スイッチの要部断面図。
【図１４】従来の押釦スイッチに係り、固定接点とハウジングの製造の第１工程を示す説明図。
【図１５】従来の押釦スイッチに係り、固定接点とハウジングの製造の第２工程を示す説明図。
【符号の説明】
１ハウジング
１ａ前面
１ｂ底壁
１ｃ側壁
１ｄ上壁
１ｅ後壁
１ｆ開口部
１ｇ凹部
１ｈ突起
１ｊ段落ち部
２第１の固定接点
２ａ第１の接点部
２ｂ第１の連結部
２ｃ第１の端子部
３第２の固定接点
３ａ第２の接点部
３ｂ第２の連結部
３ｃ第２の端子部
４第３の固定接点
４ａ第３の接点部
４ｂ第３の連結部
４ｃ第３の端子部
Ｒ１第４の連結部
５可動接点
６カバー
６ａ孔
６ｂ前面板
６ｃ側面板
６ｄ突出片
６ｅ折り曲げ片
６ｆ切り欠き部
６ｇ小孔
７操作部材
７ａ操作部
７ｂ鍔部
７ｃ押圧部
８プリント基板
８ａ孔
９半田
１１金属板
１１ａ貫通孔
１２繋ぎ部
１２ａ切断部
１３送り孔
Ｓ１〜Ｓ４直線[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a push-button switch suitable for being mounted on a printed circuit board of various electronic devices by surface mounting.
[0002]
[Prior art]
Referring to the drawings of a conventional push button switch, FIG. 12 is a side view of the conventional push button switch, FIG. 13 is a sectional view of a main part of the conventional push button switch, and FIG. FIG. 15 is an explanatory view showing a second step of manufacturing a fixed contact and a housing in relation to a conventional push button switch.
[0003]
Next, a configuration of a conventional push button switch will be described with reference to FIGS. 12 and 13. A housing 51 formed of a synthetic resin molded product has a box shape, and has a bottom wall 51a and an upper portion extending from four sides of the bottom wall 51a. And an opening 51c provided at an upper central portion.
[0004]
As shown in FIG. 14 in particular, the first fixed contact 52 made of a metal plate includes a pair of contact portions 52a arranged at an interval, a pair of connecting portions 52b connected to the pair of contact portions 52a, It has a pair of terminal portions 52c extending from both sides of the pair of connecting portions 52b.
[0005]
As shown in FIG. 14, the second fixed contact 53 made of a metal plate includes a contact 53a located between a pair of contacts 52a, a connection 53b connected to the contact 53a, and a connection 53b. It has a pair of terminal portions 53c extending to both sides from the portion 53b.
[0006]
The contact portions 52a, 53a of the first and second fixed contacts 52, 53 are located between the terminal portions 52c, 53c, and are in the same direction as the straight lines S5, S6 in the extending direction of the terminal portions 52c, 53c. Are arranged on the straight line S7.
[0007]
The connecting portion 52b that connects the contact portion 52a and the terminal portion 52c includes a portion extending from the contact portion 52a in a direction orthogonal to the straight line S5 and a portion extending in the direction of the straight line S5. The connecting portion 53b connecting the terminal portion 53c and the terminal portion 53c includes a portion extending from the contact portion 53a in a direction orthogonal to the straight line S6 and a portion extending in the direction of the straight line S6.
[0008]
The first and second fixed contacts 52, 53 are attached with the connecting portions 52b, 53b embedded in the housing 51, and the contact portions 52a, 53a are exposed in the opening 51c on the bottom wall 51a. At the same time, the terminal portions 52c and 53c protrude out of the housing 1 and are bent downward.
[0009]
Although not shown here, a movable contact is housed in the opening 1c, and the movable contact is operated by an operation member movably attached to the housing 1 so that the first and second fixed contacts 52 are operated. , 53 are turned ON and OFF.
[0010]
Next, a method for manufacturing a fixed contact and a housing according to a conventional push button switch having such a configuration will be described with reference to FIGS. 14 and 15. First, in a first step shown in FIG. 55 is punched.
[0011]
Then, as shown in FIG. 14, the first fixed contact 52 is formed on one side of the metal plate 55, and the second fixed contact 53 is formed on the other side of the metal plate 55. You.
[0012]
The first and second fixed contacts 52, 53 are formed in a state where the contact portions 52a, 53a are arranged in a line in the longitudinal direction (straight line S7) of the central portion of the metal plate 55.
The connecting portions 52b and 53b extend in the short direction and the long direction orthogonal to the straight line S7 and are connected to the pair of terminal portions 52c and 53c.
[0013]
That is, the pair of terminal portions 52c and 53c extend in the longitudinal direction of the metal plate 55 and are arranged so as to face each other, and the contact portions 52a and 53a extend in the longitudinal direction (straight line S7) at the center of the metal plate 55. And are arranged in parallel with the pair of terminal portions 52c and 53c.
[0014]
Further, both ends of the terminal portions 52c and 53c are connected to a metal plate 55. Next, the metal plate 55 having such a configuration is sequentially formed using a feed hole 56 by a molding die (not shown). In a second step shown in FIG. 15, the housing 51 is formed on the metal plate 55 by molding.
At this time, the side surface and the upper surface of the contact portion 52a are surrounded by a molding die to prevent the resin from flowing into the contact surface.
[0015]
Then, the connecting portions 52b, 53b of the first and second fixed contacts 52, 53 are buried in the bottom wall 51a, the contact portion 53a is exposed at the center of the opening 51c, and the pair of contact portions 52a is connected to the contact portion 52a. The terminal 3c is exposed to the vicinity of the outer periphery of the opening 1c, and the terminal portions 52c and 53c are projected outside the housing 51.
Further, in order to prevent the resin from flowing into the contact surface in the above-described molding die, a metal plate 55 is provided on the side surface of the contact portion 52a in the longitudinal direction by a width for pressing the die. There is a need.
[0016]
Next, after cutting at the position of the two-dot chain line Z1 shown in FIG. 15 and separating the first and second fixed contacts 52 and 53 from the metal plate 55, when the terminal portions 52c and 53c are bent, the manufacturing is completed. Is completed. (For example, see Patent Document 1)
[0017]
[Patent Document 1]
Japanese Patent No. 2798814 gazette
[Problems to be solved by the invention]
In the conventional push button switch, the pair of contact portions 52a of the first fixed contact 52 are formed on a straight line S7 parallel to the extending direction (straight line S6) of the terminal portion 52c with the contact portion 53a interposed therebetween. 55 becomes long in the longitudinal direction, and there is a problem that material removal is bad and cost is high.
The connecting portion 52b connecting the pair of contact portions 52a and the terminal portion 52c of the first fixed contact 52 includes a portion extending from the contact portion 52a in a direction orthogonal to the straight line S5 and a portion extending in the direction of the straight line S5. Therefore, there is a problem that the connecting portion 52b becomes long, material removal is poor, cost is increased, the configuration is complicated, and manufacturing of a molding die becomes troublesome.
[0019]
Therefore, an object of the present invention is to provide a push button switch which is easy to manufacture, inexpensive and easy to manufacture.
[0020]
[Means for Solving the Problems]
As a first means for solving the above problems, a housing made of an insulating material having an opening, first and second fixed contacts buried and mounted in the housing, and housed in the opening. A movable contact, and an operating unit movably attached to the opening to operate the movable contact, wherein the first fixed contact is a first contact exposed in the opening; A first connecting portion connected to the first contact portion and buried in the housing; and a first terminal portion connected to the first connecting portion and protruding outside the housing, wherein the second fixing portion is provided. The contact is connected to the second contact portion exposed in the opening, the second contact portion connected to the second contact portion and embedded in the housing, and connected to the second connection portion, A second terminal portion protruding outside; The first fixed contact is such that the first contact portion is disposed near the outer periphery of the opening, and the first contact portion is connected to the first connection portion, and the first connection portion is connected to the first connection portion. One terminal portion is formed to extend in a straight line direction, and the second contact portion of the second fixed contact is arranged at the center of the opening.
[0021]
As a second solution, the second fixed contact is such that the second contact portion is connected to the second connecting portion, and the second terminal portion connected to the second connecting portion is in a linear direction. And the second connecting portion and the second terminal portion are arranged in parallel with the first connecting portion and the first terminal portion, respectively. .
[0022]
Further, as a third solution, there is provided the third fixed contact, wherein the third fixed contact includes a third contact portion exposed near the outer periphery of the opening and a third fixed contact. A third connecting portion that is connected and embedded in the housing, and a third terminal portion that is connected to the third connecting portion and protrudes outside the housing, wherein the third fixed contact includes the third fixed contact. The second fixed contact is disposed at a position opposed to the first fixed contact with the third fixed portion and the third terminal portion being interposed between the first fixed contact and the first fixed contact. The configuration was such that the terminals were arranged in parallel with each other.
[0023]
As a fourth solution, the first and third fixed contacts are connected by a fourth connecting portion.
As a fifth solution, the second terminal portion of the second fixed contact is arranged in parallel with the first terminal portion with the second contact portion therebetween. . As a sixth solution, the terminal portion is bent along the terminal portion drawing surface of the housing.
[0024]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is a front view of a push button switch according to a first embodiment of the present invention, FIG. 2 is a side view of the push button switch according to a first embodiment of the present invention, and FIG. FIG. 4 is a top view of the push button switch according to the first embodiment of the present invention, and FIG. 4 is a bottom view of the push button switch according to the first embodiment of the present invention.
[0025]
5 is a sectional view of a main part according to a first embodiment of the push button switch of the present invention, FIG. 6 is an enlarged sectional view of a portion A in FIG. 5, and FIG. 7 relates to a first embodiment of the push button switch of the present invention. It is explanatory drawing which shows the attachment state.
[0026]
FIG. 8 is an explanatory view showing a first step of manufacturing a fixed contact and a housing according to a first embodiment of the push button switch of the present invention, and FIG. FIG. 10 is an explanatory view showing a second step of manufacturing a contact and a housing. FIG. 10 is a view showing a first step of manufacturing a fixed contact and a housing according to a second embodiment of the push button switch of the present invention. FIG. FIG. 8 is an explanatory view showing a second step of manufacturing a fixed contact and a housing according to the second embodiment of the push button switch.
[0027]
Next, the configuration of the first embodiment of the push button switch of the present invention will be described with reference to FIGS. 1 to 7. The housing 1 made of a synthetic resin molded product has a box shape and a front surface 1a located on the side. A bottom wall 1b extending rearward from the front surface 1a, a pair of side walls 1c extending upward from an end of the bottom wall 1b, an upper wall 1d provided between the pair of side walls 1c, and a rear wall closing a rear surface. 1e, an opening 1f provided in the center of the front surface 1a, a concave portion 1g provided on the front lower surface of the bottom wall 1b, and a projection 1h provided on the front surface 1. In addition, a stepped-down portion 1j which is notched is formed at a corner facing the front surface 1a, the bottom wall 1b, and the side wall 1c.
[0028]
Each of the first, second, and third fixed contacts 2, 3, and 4 made of a metal plate has a first contact portion 2a, a second contact portion 3a, A third contact portion 4a, and a first connecting portion 2b, a second connecting portion 3b, and a third connecting portion connected to the first, second, and third contact portions 2a, 3a, and 4a, respectively. 4b and a first terminal portion 2c, a second terminal portion 3c, and a third terminal portion 4c connected to the first, second, and third connecting portions 2b, 3b, and 4b, respectively.
[0029]
The first, second, and third contact portions 2a, 3a, and 4a of the first, second, and third fixed contacts 2, 3, and 4 are arranged on a straight line S1 as shown in FIG. And the first, second, and third connecting portions 2b, 3b, 4b and the first, second, and third terminals from the first, second, and third contact portions 2a, 3a, and 4a, respectively. The portions 2c, 3c, and 4c are arranged to extend in the directions of straight lines S2, S3, and S4 orthogonal to the straight line S1.
[0030]
As a result, the first, second, and third connecting portions 2b, 3b, and 4b and the first, second, and third terminal portions 2c, 3c, and 4c are arranged in parallel with each other.
In this embodiment, the reliability as a switch is improved by connecting the first and third fixed contacts 2 and 4 at the fourth connecting portion R1 and using each as a common contact. The fourth connecting portion R1 may be omitted.
[0031]
The first, second, and third fixed contacts 2, 3, and 4 have first, second, and third connecting portions 2b, 3b, 4b, and a fourth connecting portion R1 embedded in the rear wall 1e. The second contact portion 3a is exposed at the center of the opening 1f (the center of the rear wall 1e), and the first and third contact portions 2a and 4a are connected to the second contact portion 3a. It is exposed near the outer periphery of the opening 1f (outer periphery of the rear wall 1e).
[0032]
Further, the first, second, and third terminal portions 2c, 3c, and 4c protrude outward from the bottom wall 1b of the housing 1, and each extend rearward along the lower surface of the bottom wall 1b that is a terminal portion extraction surface. The bottom surfaces of the bent first, second, and third terminal portions 2c, 3c, and 4c are positioned lower than the lower surface of the bottom wall 1b. (See especially Fig. 6)
[0033]
In this embodiment, three first, second, and third fixed contacts 2, 3, and 4 have been described. However, two first and second fixed contacts 2, 3, are used. Alternatively, it may be constituted by the second and third fixed contacts 3 and 4.
[0034]
The movable contact 5 made of a dome-shaped spring-like metal plate or the like is housed in the opening 1f of the housing 1 and, as shown in FIG. 5, has a central portion facing the second contact portion 3a and an outer peripheral portion. The first and third contact portions 2a and 4a are arranged in contact with each other.
[0035]
A generally U-shaped cover 6 made of a metal plate includes a plate-shaped front plate 6b having a hole 6a in the center, and a pair of side plates 6c bent rearward at right angles from both ends of the front plate 6b. A protruding piece 6d protruding downward from the lower end of the pair of side plates 6c, a pair of bent pieces 6e bent rearward at opposite lower corners of the front plate 6b, and a position facing the bent piece 6e. And a notch 6f provided in the pair of side plates 6c, and a small hole 6g provided in a corner of the front plate 6b.
[0036]
The cover 6 has the front plate 6b disposed on the front surface 1a of the housing 1 so as to close the opening 1f with the front plate 6b, and the projection 1h of the housing 1 is inserted into the small hole 6g. Is attached to the housing 1 by heat caulking or the like.
[0037]
When the cover 6 is attached to the housing 1, the bent piece 6e is arranged in the concave portion 1g, and the lower surface of the bent piece 6e is located below the lower surface of the bottom wall 1b. It is flush with the lower surfaces of the first, second, and third terminal portions 2c, 3c, and 4c.
At this time, stepped portions 1j are formed at both corners of the housing 1 where the back surfaces of the bent piece 6e and the protruding piece 6d face each other, so that the cover 6 on the mounting surface side and the front surface 1a of the housing 1 A void is formed at the joint of the two.
[0038]
Further, when the cover 6 is attached to the housing 1, the pair of side plates 6c are arranged so as to cover the outer peripheral portion of the side wall 1c, and the protruding piece 6d protrudes downward beyond the lower surface of the bent piece 6e. At the same time, the bent piece 6e can be viewed from the side through the notch 6f.
[0039]
In this embodiment, the bent piece 6e has been described as being provided in a pair at the lower corner of the front plate 6b. However, one or two or more bent pieces 6e are provided at an arbitrary position below the front plate 6b. It may be provided.
[0040]
The operating member 7 which is a push button made of a synthetic resin molded product includes an operating portion 7a, a flange portion 7b provided at a rear portion of the operating portion 7a, and a pressing portion 7c which projects rearward from a central portion of the operating portion 7a. The operation member 7 is attached to the housing 1 so that the flange portion 7b and the pressing portion 7c are housed in the opening 1f, and the operation portion 7a protrudes outside from the hole 6a. Have been.
The push button switch of the present invention having such a configuration is formed of an extremely small, ultra-small, for example, having a lateral dimension of about 4.5 mm and a height dimension of about 3.5 mm.
[0041]
As shown in FIG. 7, the push button switch of the present invention having such a configuration has the lower surface side of the bottom wall 1b of the housing 1 facing the printed circuit board 8, and the first, second, and third terminal portions 2c, 3c, 4c and bent piece 6e are placed on printed circuit board 8, and first, second and third terminal portions 2c, 3c, 4c and bent piece 6e are provided on conductive board 8 in a conductive pattern (FIG. (Not shown) and attached by soldering 9, and the push button switch is surface-mounted on the printed circuit board 8.
At this time, the bending piece 6e has a soldering portion formed by using an outer bending corner portion not facing the front surface 1a of the housing 1, and only the front side of the bending piece 6e is soldered.
[0042]
Then, when the solder 9 is attached to the bent piece 6e, the front face 1a of the housing 1 is covered with the bent piece 6e, so that it is difficult for the flux to enter the opening 1f.
Furthermore, since a gap is formed at the joint between the cover 6 and the housing 1 on the mounting surface by the notch 6f and the step-down portion 1j of the housing 1, a large creepage distance of the flux can be secured.
[0043]
When the pushbutton switch is mounted on the surface, the lower end of the bent piece 6e and the lower surfaces of the first, second, and third terminal portions 2c, 3c, and 4c protrude from the lower surface of the housing 1 (bottom wall 1b). Since the lower surface (bottom wall 1b) of 1 is floating from the printed circuit board 8, it is difficult for the flux to be transmitted to the outer peripheral surface of the housing 1, so that the flux is less likely to enter the opening 1f and the reflow furnace The switch does not tilt around the lower surface of the housing 1 due to the difference in the melting time of the solder when the switch is passed through.
[0044]
Further, when the push button switch is mounted on the surface, the protruding piece 6d is inserted into the hole 8a of the printed circuit board 8, whereby the positioning of the push button switch with respect to the printed circuit board 8 is ensured.
[0045]
When the operating portion 7a of the operating member 7 is pressed in a direction parallel to the printed circuit board 8, the dome-shaped movable contact 5 is pushed, and the central portion of the movable contact 5 performs a reversing operation.
As a result, while the outer peripheral portion of the movable contact 5 is in contact with the first and third contact portions 2a and 4a, the central portion moves and contacts the second contact portion 3a, and the first and third contacts are moved. The portions between the contact portions 2a, 4a and the second contact portion 3a are turned on.
[0046]
When the pressing of the operating portion 7a is released, the movable contact 5 returns to its original state by its own spring property, whereby the operating member 7 is returned to the original state, and the first and third contact points are returned. The portion between the portions 2a, 4a and the second contact portion 3a is turned off.
[0047]
Next, a method of manufacturing the fixed contact and the housing according to the first embodiment of the push button switch of the present invention will be described with reference to FIGS. 8 and 9. First, in the first step shown in FIG. 11 is stamped and protruded.
[0048]
Then, as shown in FIG. 8, the first, second, and third fixed contacts 2, 3, and 4 are first, second, and third contact portions 2a, 3a, and 4a that protrude forward in the drawing. Are arranged in a row in a short direction (straight line S1) orthogonal to the longitudinal direction of the metal plate 11, and are formed in parallel in the short direction.
[0049]
As a result, the first, second, and third connecting portions 2b, 3b, 4b and the first, second, and third terminals are respectively connected to the first, second, and third contact portions 2a, 3a, and 4a. The portions 2c, 3c, and 4c are arranged so as to extend in a state parallel to the longitudinal direction of the metal plate 11 (the straight lines S2, S3, and S4 directions).
[0050]
That is, when the first, second, and third contact portions 2a, 3a, and 4a are arranged in a line in a short direction (straight line S1) orthogonal to the longitudinal direction of the metal plate 11, the first, second, and second contacts are formed. As compared with the case where the contact portions of No. 3 are arranged in the longitudinal direction of the metal plate 11, the metal plate 11 can be shortened in the longitudinal direction, a material can be easily removed, and an inexpensive fixed contact structure can be obtained.
[0051]
The ends of the first, second, and third terminal portions 2c, 3c, and 4c are connected to the metal plate 11, and the other ends of the first and third contact portions 2a and 4a are connected to the metal plate. 11 are connected to the metal plate 11 by a pair of connecting portions 12 extending in the longitudinal direction, and the first and third contact portions 2a and 4a are connected by a fourth connecting portion R1.
[0052]
Next, the metal plate 11 having such a configuration is sequentially sent to a molding die (not shown) by using the feed hole 13, and is sent to the metal plate 11 in a second step shown in FIG. 9. The housing 1 having the configuration shown in FIGS. 1 to 7 is formed by molding.
At this time, it is necessary to surround the upper and side surfaces of the contact portions 2a and 4a with a mold to prevent the resin from flowing onto the contact surface. It can be provided in a direction orthogonal to the longitudinal direction, the width of the housing 1 in the longitudinal direction can be reduced, and the material yield of the metal plate 11 can be improved.
[0053]
Then, the first, second, and third connecting portions 2b, 3b, 4b of the first, second, and third fixed contacts 2, 3, 4, and the fourth connecting portion R1 and a part of the connecting portion 12 are formed. Is embedded in the rear wall 1e, the second contact portion 3a is exposed at the center of the opening 1f (the center of the rear wall 1e), and the first and third contact portions 2a and 4a are connected to the second contact. The first, second, and third terminal portions 2c, 3c, 4c, and the connecting portion 12 are exposed outside the vicinity of the outer periphery of the opening 1f (the outer periphery of the rear wall 1e) with the portion 3a interposed therebetween. It will be in the state protruding to.
In the insert molding step, the first, second, and third connecting portions 2b, 3b, and 4b have through holes 11a formed by punching the metal plate 11 in the thickness direction. Since the resin flows into the inside and is solidified, even when a large force is applied in the terminal pull-out direction during operation, the switch does not fall off and the lateral pressing strength can be increased.
[0054]
Next, after cutting at the position of the two-dot chain line Z1 shown in FIG. 9 and separating the first, second, and third fixed contacts 2, 3, and 4 from the metal plate 11, the first, second, and When the three terminal portions 2c, 3c, 4c are bent along the bottom wall 1b of the housing 1, the manufacture is completed.
When the connecting portion 12 is cut, the cut portion 12a is exposed from the upper wall 1d as shown in FIG.
[0055]
10 and 11 show a method of manufacturing a fixed contact and a housing according to a second embodiment of the push button switch of the present invention. The method of manufacturing will be described with reference to FIGS. 10 and 11. First, FIG. In the first step shown in FIG. 7, the hoop-shaped metal plate 11 is subjected to punching and extrusion.
[0056]
Then, as shown in FIG. 10, the first and second fixed contacts 2 and 3 are arranged such that the protruding first and second contact portions 2 a and 3 a are arranged in the short direction perpendicular to the longitudinal direction of the metal plate 11 ( In a state where they are arranged in a line on the straight line S1), they are formed in parallel in the short direction.
[0057]
The first fixed contact 2 formed on one side of the metal plate 11 includes a first contact portion 2a to a first connecting portion 2b, and a first terminal portion 2c formed in a longitudinal direction of the metal plate 11. It is arranged so as to extend in a state parallel to the (straight line S2 direction).
[0058]
The second fixed contact 3 formed on the other side of the metal plate 11 has a second contact portion 3a located at the center of the metal plate 11 in the lateral direction and a second terminal portion 3c. Is arranged on the other side of the metal plate 11 so as to extend in a state parallel to the longitudinal direction (the direction of the straight line S4), and the second connecting portion 3b is connected to the second contact portion 3a and the second terminal portion 3c. It is in a state where it is set.
[0059]
That is, when the first and second contact portions 2a and 3a are arranged in a line in a short direction (straight line S1) orthogonal to the longitudinal direction of the metal plate 11, the first and second contact portions become The metal plate 11 can be shortened in the longitudinal direction as compared with those arranged in the longitudinal direction, so that a material can be easily removed and an inexpensive fixed contact structure can be obtained.
[0060]
The ends of the first and second terminal portions 2c and 3c are connected to the metal plate 11, and the other ends of the first contact portion 2a and the second terminal portion 3c are connected to the longitudinal sides of the metal plate 11. It is connected to the metal plate 11 by a connecting portion 12 extending in the direction.
[0061]
Next, the metal plate 11 having such a configuration is sequentially sent to a molding die (not shown) by using the feed hole 13, and the metal plate 11 is fed to the metal plate 11 in a second step shown in FIG. 11. The housing 1 having the configuration shown in FIGS. 1 to 7 is formed by molding.
[0062]
Then, the first and second connecting portions 2b and 3b of the first and second fixed contacts 2 and 3 and a part of the connecting portion 12 are buried in the rear wall 1e, and the second contact portion 3a is opened to the opening 1f. And the first contact 2a is exposed near the outer periphery of the opening 1f (the outer periphery of the rear wall 1e), and the first and second terminal portions are exposed. 2c, 3c, and the connecting portion 12 project out of the housing 1.
[0063]
Next, after cutting at the position of the two-dot chain line Z1 shown in FIG. 11 and separating the first and second fixed contacts 2 and 3 from the metal plate 11, the first and second terminal portions 2c and 3c When it is bent along the bottom wall 1b of the housing 1, its manufacture is completed.
When the connecting portion 12 is cut, the cut portion 12a is exposed from the upper wall 1d as shown in FIG.
[0064]
The configuration of the push button switch according to the second embodiment is the same as that of the first embodiment except for two first and second fixed contacts 2 and 3, and the same parts are denoted by the same reference numerals. Then, the description is omitted.
[0065]
【The invention's effect】
A push button switch according to the present invention includes a housing made of an insulating material having an opening, first and second fixed contacts embedded and mounted in the housing, a movable contact housed in the opening, An operating unit movably mounted to operate the movable contact, wherein the first fixed contact is connected to the first contact exposed in the opening, and is embedded in the housing; A first connecting portion connected to the first connecting portion, the first terminal portion protruding out of the housing, and the second fixed contact is exposed in the opening; A second fixed portion connected to the second contact portion and embedded in the housing, and a second terminal portion connected to the second connected portion and protruding outside the housing; The first contact portion is arranged near the outer periphery of the opening, and the first contact portion A first connecting portion from the portion and a first terminal portion connected to the first connecting portion are formed to extend in a straight line direction, and a second contact portion of the second fixed contact is provided at a central portion of the opening. The arrangement was arranged.
As described above, the first fixed contact has the first contact portion disposed near the outer periphery of the opening, the first contact portion to the first connecting portion, and the first connecting portion connected to the first connecting portion. When the terminal portion is formed to extend in the straight line direction (the straight line S2 direction), the first and second contact portions of the first and second fixed contacts can be arranged on the straight line S1 orthogonal to the straight line S2 direction, As for the first contact portion of the first fixed contact, the size in the longitudinal direction of the metal plate can be reduced as compared with the conventional case, and a material with good material removal and low cost can be obtained.
Further, since the first connecting portion of the first fixed contact 2 connects the first contact portion and the first terminal portion in a straight line, the first connecting portion is shorter than in the related art, and material is removed. In addition, it is inexpensive, its configuration is simple, and the production of a molding die becomes easy.
[0066]
The second fixed contact is formed by extending the second contact portion from the second contact portion and the second terminal portion connected to the second connection portion in a linear direction, and the second fixed contact portion is formed by a second connection portion. , And the second terminal portion are arranged in parallel with the first connecting portion and the first terminal portion, respectively, so that the width direction can be shortened, the material cost can be reduced, and inexpensive. Is obtained.
[0067]
A third fixed contact, the third fixed contact being exposed near the outer periphery of the opening, and a third fixed contact connected to the third contact and embedded in the housing; 3 and a third terminal connected to the third connection and protruding outside the housing. The third fixed contact is connected to the first fixed contact with the second fixed contact interposed therebetween. Since the third connection portion and the third terminal portion are arranged in opposition to each other and are arranged in parallel with the first connection portion and the first terminal portion, respectively, The connecting portion is short, the material removal is good, the cost is low, the configuration is simple, and the manufacturing of the molding die is easy.
[0068]
Further, since the first and third fixed contacts are connected by the fourth connecting portion, the fourth connecting portion serves as a support portion during the forming of the housing, so that accurate processing can be performed.
[0069]
Further, the second terminal portion of the second fixed contact is disposed in parallel with the first terminal portion with the second contact portion therebetween, so that the space between the first and second terminal portions can be widened. Good material removal and inexpensive products can be obtained.
[0070]
Further, since the terminal portion is bent along the terminal portion drawing surface of the housing, a terminal corresponding to surface mounting can be obtained.
[Brief description of the drawings]
FIG. 1 is a front view of a push-button switch according to a first embodiment of the present invention.
FIG. 2 is a side view according to the first embodiment of the push button switch of the present invention.
FIG. 3 is a top view of the push-button switch according to the first embodiment of the present invention.
FIG. 4 is a bottom view of the push-button switch according to the first embodiment of the present invention.
FIG. 5 is a sectional view of a main part according to a first embodiment of the push button switch of the present invention.
FIG. 6 is an enlarged sectional view of a portion A in FIG. 5;
FIG. 7 is an explanatory view showing a mounted state of the push button switch according to the first embodiment of the present invention.
FIG. 8 is an explanatory view showing a first step of manufacturing a fixed contact and a housing according to the first embodiment of the push button switch of the present invention.
FIG. 9 is an explanatory view showing a second step of manufacturing the fixed contact and the housing according to the first embodiment of the push button switch of the present invention.
FIG. 10 is an explanatory view showing a first step of manufacturing a fixed contact and a housing according to a second embodiment of the push button switch of the present invention.
FIG. 11 is an explanatory view showing a second step of manufacturing the fixed contact and the housing according to the second embodiment of the push button switch of the present invention.
FIG. 12 is a side view of a conventional push button switch.
FIG. 13 is a sectional view of a main part of a conventional push button switch.
FIG. 14 is an explanatory view showing a first step of manufacturing a fixed contact and a housing according to a conventional push button switch.
FIG. 15 is an explanatory view showing a second step of manufacturing a fixed contact and a housing according to a conventional push button switch.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Housing 1a Front surface 1b Bottom wall 1c Side wall 1d Top wall 1e Rear wall 1f Opening 1g Depression 1h Projection 1j Step-down part 2 First fixed contact 2a First contact 2b First connection 2c First terminal 3 2nd fixed contact 3a 2nd contact part 3b 2nd connection part 3c 2nd terminal part 4 3rd fixed contact 4a 3rd contact part 4b 3rd connection part 4c 3rd terminal part R1 4 connecting portion 5 movable contact 6 cover 6a hole 6b front plate 6c side plate 6d projecting piece 6e bent piece 6f cutout portion 6g small hole 7 operating member 7a operating portion 7b flange portion 7c pressing portion 8 printed circuit board 8a hole 9 solder 11 Metal plate 11a Through hole 12 Connecting portion 12a Cutting portion 13 Feed holes S1 to S4 Straight line

Claims

A housing made of an insulating material having an opening, first and second fixed contacts embedded and attached to the housing, a movable contact housed in the opening, and movably attached to the opening; , An operation unit for operating the movable contact, wherein the first fixed contact is connected to the first contact exposed in the opening, and is embedded in the housing. A first connecting portion connected to the first connecting portion, a first terminal portion protruding outside the housing, and the second fixed contact is a second contact portion exposed in the opening; A second connecting portion connected to the second contact portion and embedded in the housing; and a second terminal portion connected to the second connecting portion and protruding outside the housing. The first fixed contact is configured such that the first contact portion has the opening. The first connection portion and the first terminal portion connected to the first connection portion are formed in the vicinity of the outer periphery of the first contact portion and extend in a linear direction, and are formed in the second contact portion. A push button switch, wherein a second contact portion of the fixed contact is arranged at a center of the opening.

The second fixed contact is formed by extending the second contact portion from the second contact portion, the second connection portion, and the second terminal portion connected to the second connection portion in a linear direction. 2. The push button switch according to claim 1, wherein each of said connecting portion and said second terminal portion are arranged in parallel with each of said first connecting portion and said first terminal portion. .

The third fixed contact includes a third fixed contact that is exposed in the vicinity of an outer periphery of the opening, and is connected to the third contact and embedded in the housing. A third connecting portion, and a third terminal portion connected to the third connecting portion and protruding out of the housing, wherein the third fixed contact is disposed between the third fixed contact and the second fixed contact. The third connection portion and the third terminal portion are disposed at positions facing the first fixed contact, and each of the third connection portion and the third terminal portion is parallel to each of the first connection portion and the first terminal portion. The push button switch according to claim 1, wherein the push button switch is arranged.

The push button switch according to claim 3, wherein the first and third fixed contacts are connected by a fourth connecting portion.

The push-button switch according to claim 1, wherein the second terminal portion of the second fixed contact is disposed in parallel with the first terminal portion with the second contact portion therebetween. .

The push button switch according to any one of claims 1 to 5, wherein the terminal portion is bent along the terminal portion drawing surface of the housing.