JP4008648B2

JP4008648B2 - Push button switch

Info

Publication number: JP4008648B2
Application number: JP2000288899A
Authority: JP
Inventors: 憲太郎大和
Original assignee: Alps Electric Co Ltd
Current assignee: Alps Alpine Co Ltd
Priority date: 2000-09-19
Filing date: 2000-09-19
Publication date: 2007-11-14
Anticipated expiration: 2020-09-19
Also published as: JP2002093272A

Description

【０００１】
【発明の属する技術分野】
本発明は、各種電子機器の操作用スイッチとして使用される押釦スイッチの構造に係り、特に回路基板への表面実装用として使用される横押し操作タイプの押釦スイッチの構造に関する
【０００２】
【従来の技術】
従来の表面実装用として使用される横押し操作タイプの押釦スイッチの構造としては、合成樹脂などの絶縁材で内部に横向きに収納部を有する箱状に形成されたハウジングと、このハウジングの収納部の内底面に配設された導電性の金属材からなる固定接点と、この固定接点上に対向して配設された、同じく導電性の金属材からドーム状に形成された可動接点と、前記ハウジングの収納部内に横押し方向へ摺動可能に配設され、前記可動接点を押圧して前記固定接点と接離させる操作部材と、前記ハウジングの収納部を覆うようにハウジングに取り付けられた取付フレームとを備え、前記ハウジングの底面側に突設されて平面状の取付面を有する外部端子と、前記取付フレームの下端側に設けられて平面状の取付面を有する取付脚とを、回路基板の同一の平面上に半田付けして固定するように形成した構造のものが一般的に知られている。
【０００３】
また、これとは別に、前記可動接点をラバースプリングの下端部にカーボン接点を固着することにより形成し、前記ハウジングの収納部内に配設された前記操作部材によりラバースプリングの頂部を押圧して、前記ラバースプリングの反転動作に伴って、前記可動接点を前記固定接点と接離するように形成した構造のものも一般的に知られている。
【０００４】
【発明が解決しようとする課題】
しかしながら、上述した従来の横押し操作タイプの押釦スイッチの構造においては、前記ハウジングと前記取付フレームとは、前記ハウジングに形成した突起部と、前記取付フレームに形成した窓孔部とによって掛け止めさせることによって取り付けられていることから、前記突起部と前記窓孔部との寸法差によりガタが発生し、スイッチの実装面の高さ寸法がばらついて、前記外部端子の取付面と前記取付フレームの取付面とを面一にすることができないという問題があった。
【０００５】
したがって、本発明では上述した問題点を解決し、簡単に組立ができると共に、外部端子の取付面と取付フレームの取付面とを面一にすることが可能で、回路基板上への表面実装を確実に行うことができる横押し操作タイプの押釦スイッチの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】
上記課題を解決するために本発明では第１の手段として、ハウジングと、このハウジングに設けられた、回路基板への取り付けを行う底面部と、この底面部から直立して形成された、一方の側面に開口部が設けられたコ字状の側壁と、前記側壁に囲まれた収納部と、この収納部において、前記開口部と対向する内壁面に配設された固定接点と、この固定接点から前記底面部側に突設して導出された外部端子と、前記ハウジングの開口部から突出して押し込み可能に設けられた操作部材と、この操作部材を前記ハウジングの開口部から突出する方向へ付勢する弾性部材と、前記操作部材又は弾性部材が当接すると共に、前記ハウジングの収納部を覆うように前記ハウジングの側壁と係合する側板を有する取付フレームとを備え、前記外部端子及び前記取付フレームの前記ハウジングの底面部側の端部には、平面状からなる回路基板への表面実装用の取付面が形成されており、前記ハウジングと前記取付フレームは、前記弾性部材の弾性により互いに反発する方向へ付勢され、前記ハウジングの側壁には一端部に傾斜面が設けられた突部からなる係合部が形成され、前記取付フレームの側板には一端部に傾斜面が設けられた孔部からなる係合部が形成され、前記ハウジングの側壁に設けられた係合部と前記取付フレームの側板に設けられた係合部とが係合されると共に、前記ハウジングの側壁に設けられた係合部と前記取付フレームの側板に設けられた係合部とが、前記突部に設けられた傾斜面と前記孔部に設けられた傾斜面とが摺接可能となるように係合され、前記弾性部材の付勢力により前記ハウジングの係合部が前記傾斜面に沿って前記取付フレームの取付面方向へ片寄せされることにより、前記外部端子の回路基板への取付面と前記取付フレームの回路基板への取付面とが面一となる方向へ案内されることを特徴とする。
【０００７】
また、第２の手段として、前記ハウジングの側壁には、前記取付面側で取付面に平行した第１の直線部と、この第１の直線部に対向すると共に、前記操作部材が突出する方向とは反対方向に幅狭となる第１の傾斜面とを有する係合突部を形成し、且つ、前記取付フレームの側板には、前記第１の直線部に対応した第２の直線部と、前記第１の傾斜面に対応した第２の傾斜面とを有する係合孔部を形成し、前記弾性部材の付勢力で前記第１及び第２の傾斜面が摺接することにより前記第１及び第２の直線部が当接して、前記外部端子の取付面と前記取付フレームの取付面が面一となるように形成したことを特徴とする。
【０００８】
また、第３の手段として、前記第１の直線部と前記外部端子の前記取付面までの距離と、前記第２の直線部と前記取付フレームの前記取付面までの距離とが同一距離となるように形成されていることを特徴とする。
【０００９】
また、第４の手段として、前記弾性部材は、ドーム状のラバースプリングで形成したことを特徴とする。
【００１０】
また、第５の手段として、前記操作部材を、ラバーステムで形成すると共に、このラバーステムの鍔部を前記弾性部材として形成したことを特徴とする。
【００１１】
【発明の実施の形態】
以下、本発明の押釦スイッチの１実施例を図１乃至図３に示す。図１はハウジングの一部を破断した状態の押釦スイッチの平面図、図２は押釦スイッチの正面図、図３は同じく側面図である。
【００１２】
ハウジング１は、合成樹脂などの絶縁材で形成され、有底で側面が開口されて箱状に形成された収納部１ａを有している。
また、前記ハウジング１には、黄銅などの導電性の金属材で形成された固定端子２が、インサート成形などの方法で一体的に成形され配設されたものとなっている。
この固定端子２は、前記ハウジング１に埋設され、前記ハウジング１の外方へと突設された外部端子２ａと、前記収納部１ａの内壁面に表出され、一定の隙間を保持して配設された一対の固定接点２ｂとより構成されている。
【００１３】
また、前記ハウジング１の外方へ突設された外部端子２ａは、前記ハウジング１の底面部で側方に折り曲げられ、前記ハウジング１の底面と面一となるような取付面２ｃが形成されている。この外部端子２ａの先端が前記ハウジング１の底面部で折り曲げられて前記取付面２ｃが形成されていることから、前記ハウジング１を使用した押釦スイッチの回路基板上への表面実装が可能となっている。
【００１４】
また、前記ハウジング１の対向する両側壁部には、後述する取付フレーム６の係合孔部６ｄと係合する係合突部１ｂが形成されている。この係合突部１ｂには、前記外部端子２ａの取付面２ｃに平行な第１の直線部１ｃと、この第１の直線部１ｃに対向すると共に、前記収納部１ａが開口する方向とは反対方向に幅狭となる第１の傾斜面１ｄとが形成されている。前記第１の直線部１ｃと第１の傾斜面１ｄを有する前記係合突部１ｂが、後述する取付フレーム６の係合孔部６ｄと係合することにより、前記外部端子２の取付面２ｃと後述する取付フレーム６の取付面６ｃとを面一に一致させることができるものとなっている。
【００１５】
ラバースプリング３は、可撓性のあるエラストマーまたはシリコーンゴムなどから形成され、外形が下面開口状のドーム形で、後述する操作部材５の押し込み、および復帰の際に屈曲されて弾性力が付与されるスカート部３ａと、このスカート部３ａの上部に形成された作動部３ｂからなっている。
この作動部３ｂの下面側には作動突部３ｃが形成され、この作動突部３ｃの先端には、導電性のカーボンなどからなる可動接点４が固着されており、この可動接点４が前記固定接点２ｂと対向した状態で、前記ラバースプリング３が前記収納部１ａの内壁面に配設されたものとなっている。
【００１６】
操作部材５は、合成樹脂などの絶縁材で略矩形状に形成され、その上面側には、人の指などで操作される一回り小さな平面状の操作部５ａが設けられている。この操作部５ａに対向する下面側には、前記ラバースプリング３の作動部３ｂ上面へ当接して、前記ラバースプリング３を前記固定接点２ｂ側へ屈曲させる、押圧面部５ｂが形成されている。また、前記操作部材５の周面部には鍔部５ｃが形成されており、前記操作部材５の移動復帰時に、この鍔部５ｃが後述する取付フレーム６に当接することで、前記操作部材５が前記ハウジング１から飛び出すのを規制している。
【００１７】
また、前記ラバースプリング３は弾性部材として前記ハウジング１の収納部１ａに収納されており、前記操作部材５は前記ラバースプリング３によって常時ハウジング１から突出する方向へ付勢されたものとなっている。そして、前記ラバースプリング３の付勢力により、前記操作部材５の鍔部５ｃが後述する取付フレーム６の内面に押圧されるものとなっている。
【００１８】
取付フレーム６は、平板状の金属板で略Ｕ字状に形成されており、この取付フレーム６の中央には前記操作部材５の操作部５ａが挿通される挿通孔６ａが設けられている。この取付フレーム６が、前記ハウジング１の前記収納部１ａの開口部に取り付けられることにより、前記ラバースプリング３、及び前記操作部材５の飛び出しを防止している。また、前記取付フレーム６の対向する一対の側板６ｂの下端には、側方に水平に折り曲げられて前記ハウジング１の底面と面一となるような取付面６ｃが形成されており、この取付面６ｃを設けることにより押釦スイッチの回路基板上への表面実装が可能となっている。
【００１９】
また、前記取付フレーム６の対向する一対の側板６ｂには、前記ハウジング１の係合突部１ｂと係合する係合孔部６ｄが形成されている。この係合孔部６ｄには、前記側板６ｂの取付面６ｃに平行な第２の直線部６ｅと、この第２の直線部６ｅに対向すると共に、前記操作部材５が突出する方向とは反対方向に幅狭となる第２の傾斜面６ｆとが形成されている。前記第２の直線部６ｅ及び前記第２の傾斜面６ｆを有する前記係合孔部６ｄが、前記ハウジング１の前記第１の直線部１ｃ及び第１の傾斜面１ｄを有する前記係合突部１ｂと係合することにより、前記外部端子２ａの取付面２ｃと前記取付フレーム６の取付面６ｃとを面一に一致させることができるものとなっている。
【００２０】
上記構成の押釦スイッチを組み立てるには、まず、前記ハウジング１の収納部１ａ内の前記固定接点２ｂに対向させて、前記可動接点４が固着された前記ラバースプリング３を収納する。次に、前記ラバースプリング３の作動部３ｂ上に前記操作部材５を当接した状態で配置する。次に、前記操作部材５の操作部５ａを前記挿通口６ａから突出させた状態で前記ハウジング１の収納部１ａを覆うように前記取付フレーム６を前記ハウジング１に取り付けることで組立が完了する。
【００２１】
この場合、前記ハウジング１と前記取付フレーム６との係合は、前記ハウジング１に設けられた前記係合突部１ｂと前記取付フレーム６に設けられた前記係合孔部６ｄとによって係合されるものとなっている。この時、前記ハウジング１の前記係合突部１ｂには、前記取付面２ｃ側で取付面２ｃに平行した前記第１の直線部１ｃと、前記第１の直線部１ｃに対向すると共に、前記操作部５ａが突出する方向とは反対方向に幅狭となる前記第１の傾斜面１ｄとが形成されており、また、前記取付フレーム６の前記係合孔部６ｄには、前記第１の直線部１ｃに対応した第２の直線部６ｅと、前記第１の傾斜面１ｄに対応した第２の傾斜面６ｆとが形成されている。
【００２２】
前記ハウジング１と前記取付フレーム６との間には、弾性部材である前記ラバースプリング３が前記操作部材５を介して配設されており、前記ハウジング１と前記取付フレーム６とは前記ラバースプリング３の弾性により、互いに反発する方向へ付勢された状態となっていることから、この付勢力により前記第１及び第２の傾斜面１ｄ、６ｆが互いに摺接することとなる。この時、前記ハウジング１の前記係合突部１ｂの第１の傾斜面１ｄは、前記取付フレーム６の前記係合孔部６ｄの第２の傾斜面６ｆの幅狭となる方向へ摺接移動することから、前記係合突部１ｂが前記第２の傾斜面６ｆに沿って前記取付フレーム６の取付面６ｃ方向へ片寄せされることにより、前記係合突部１ｂの第１の直線部１ｃと前記係合孔部６ｄの第２の直線部６ｅが当接することとなる。
【００２３】
また、前記第１の直線部１ｃと前記外部端子２ａの前記取付面２ｃまでの距離と、前記第２の直線部６ｅと前記取付フレーム６の前記取付面６ｃまでの距離とは同一距離となるように形成されており、前記第１の直線部１ｃと前記第２の直線部６ｅとが当接することにより、前記外部端子２ａの取付面２ｃと前記取付フレーム６の取付面６ｃとが面一となるようになっている。
【００２４】
上記実施例においては、前記外部端子２ａが突設された前記ハウジング１と、前記ハウジング１と係合する前記取付フレーム６との間に弾性部材である前記ラバースプリング３を介在し、前記外部端子２ａ及び前記取付フレーム６の下端に、平面状からなる回路基板への表面実装用の前記取付面１ｃ、６ｃを形成し、前記ハウジング１と前記取付フレーム６との係合部に、前記ラバースプリング３の付勢力により摺接可能に係合され、前記外部端子２ａの回路基板への前記取付面２ｃと前記取付フレーム６の回路基板への前記取付面６ｃとが面一となる方向へ案内する前記第１及び第２の傾斜面１ｄ、６ｆを形成したことから、前記ハウジング１と前記取付フレーム６との係合部の寸法差によるガタの発生で、スイッチの実装面の高さ寸法がばらつくことがなくなり、前記外部端子２ａの取付面２ｃと前記取付フレーム６の取付面６ｃとを面一にすることが可能となり、回路基板上への表面実装を確実に行うことができるものとなっている。
【００２５】
また、前記ハウジング１と前記取付フレーム６との係合は、前記ハウジング１に設けられた前記係合突部１ｂと前記取付フレーム６に設けられた前記係合孔部６ｄとによって係合されるものとなっていることから、簡単に組立ができると共に、前記係合突部１ｂと前記係合孔部６ｄに設けられた前記第１及び第２の直線部１ｃ，６ｅと前記第１及び第２の傾斜面１ｄ、６ｆとによって容易に前記外部端子２ａの取付面２ｃと前記取付フレーム６の取付面６ｃとを面一にすることができる。
【００２６】
また、前記第１の直線部１ｃと前記外部端子２ａの前記取付面２ｃまでの距離と、前記第２の直線部６ｅと前記取付フレーム６の前記取付面６ｃまでの距離とが同一距離となるように形成されていることから、組立時に容易に、前記外部端子２ａの取付面２ｃと前記取付フレーム６の取付面６ｃとを面一にすることが可能となっている。
【００２７】
また、前記操作部材５を付勢する弾性部材と、前記ハウジング１と前記取付フレーム６との間に介在する弾性部材とを、ドーム状の前記ラバースプリング３で兼用して構成したことから、構成が簡易となり、安価対応が可能となっている。
【００２８】
図４乃至図６は本発明の押釦スイッチの他の実施例を示し、図４はハウジングの一部を破断した状態の押釦スイッチの平面図、図５は押釦スイッチの正面図、図６は同じく側面図である。尚、図１乃至図３で説明した同一部品については同一符号を付してその説明を省略する。
【００２９】
上記実施例との相違点は、合成樹脂からなる前記操作部材５の代わりに、可撓性のあるエラストマーまたはシリコーンゴムなどからなるラバーステム７を使用し、このラバーステム７を前記ハウジング１と前記取付フレーム６との間に介在させて弾性部材として構成した点と、前記ラバースプリング３の代わりに、金属板からなるドーム状の可動接点８を使用した点である。
【００３０】
前記ラバーステム７は、可撓性のあるエラストマーまたはシリコーンゴムなどから形成されており、このラバーステム７にはその上面側に、人の指などで操作される方形状の操作部７ａが設けられている。この操作部７ａに対向する下面側には、前記可動接点８のドーム状の頂部に当接し、この頂部を前記固定接点２ｂ側へ屈曲させる、押圧突部７ｂが形成されている。また、前記ラバーステム７の周面部には鍔部７ｃが形成されており、この鍔部７ｃが前記ハウジング１の開口された収納部１ａの上面と前記取付フレーム６の内面との間に挟持されて、前記挿通孔６ａから前記操作部７ａが突出された状態で前記ハウジング１内に収納されている。また、前記ハウジング１の上面には押圧突起１ｅが設けられており、この押圧突起１ｅで前記ラバーステム７の鍔部７ｃを押圧することで前記ラバーステム７の位置決め及び飛び出し防止を行っている。
【００３１】
また、前記ラバーステム７は弾性部材として前記ハウジング１と前記取付フレーム６との間に前記鍔部７ｃが挟持されており、前記鍔部７ｃの弾性によって互いに反発する方向へ付勢された状態となっていることから、この付勢力により前記第１及び第２の傾斜面１ｄ、６ｆが互いに摺接して係合することとなる。この時、前記ハウジング１の前記係合突部１ｂの第１の傾斜面１ｄは、前記取付フレーム６の前記係合孔部６ｄの第２の傾斜面６ｆの幅狭となる方向へ摺接移動することから、前記係合突部１ｂが前記第２の傾斜面６ｆに沿って前記取付フレーム６の取付面６ｃ方向へ片寄せされることにより、前記係合突部１ｂの第１の直線部１ｃと前記係合孔部６ｄの第２の直線部６ｅとが当接することとなる。
【００３２】
上記実施例においても、前記外部端子２ａが突設された前記ハウジング１と、前記ハウジング１と係合する前記取付フレーム６との間に弾性部材である前記ラバーステム７の鍔部７ｃを介在し、前記外部端子２ａ及び前記取付フレーム６の下端に、平面状からなる回路基板への表面実装用の前記取付面２ｃ、６ｃを形成し、前記ハウジング１と前記取付フレーム６との係合部に、前記ラバーステム７の鍔部７ｃの付勢力により摺接可能に係合され、前記外部端子２ａの回路基板への前記取付面２ｃと前記取付フレーム６の回路基板への前記取付面６ｃとが面一となる方向へ案内する前記傾斜面１ｄ、６ｆを形成したことから、前記ハウジング１と前記取付フレーム６との係合部の寸法差によるガタの発生で、スイッチの実装面の高さ寸法がばらつくことがなくなり、前記外部端子２ａの取付面２ｃと前記取付フレーム６の取付面６ｃとを面一にすることが可能となり、回路基板上への表面実装を確実に行うことができるものとなっており、図１乃至図３に示した実施例と同様の効果が得られる。
【００３３】
また、前記操作部材５を、可撓性のある弾性部材である前記ラバーステム７で形成すると共に、このラバーステム７の鍔部７ｃを前記ハウジング１の上面と前記取付フレーム６の内面との間に挟持するようにしたことから、簡易な構造で防塵構造が図れるものとなっている。
【００３４】
【発明の効果】
以上説明したように、本発明の押釦スイッチは、外部端子が突設されたハウジングと、ハウジングと係合する取付フレームとの間に弾性部材を介在し、外部端子及び取付フレームの下端に、平面状からなる回路基板への表面実装用の取付面を形成し、ハウジングと取付フレームとの係合部に、弾性部材の付勢力により摺接可能に係合され、外部端子の回路基板への取付面と取付フレームの回路基板への取付面とが面一となる方向へ案内する傾斜面を形成したことから、ハウジングと取付フレームとの係合部の寸法差によるガタの発生で、スイッチの実装面の高さ寸法がばらつくことがなくなり、外部端子の取付面と取付フレームの取付面とを面一にすることが可能となり、回路基板上への表面実装を確実に行うことができる。
【００３５】
また、ハウジングの側壁には、取付面側で取付面に平行した第１の直線部と、この第１の直線部に対向すると共に、操作部材が突出する方向とは反対方向に幅狭となる第１の傾斜面とを有する係合突部を形成し、且つ、取付フレームの側板には、第１の直線部に対応した第２の直線部と、第１の傾斜面に対応した第２の傾斜面とを有する係合孔部を形成し、弾性部材の付勢力で第１及び第２の傾斜面が摺接することにより第１及び第２の直線部が当接して、外部端子の取付面と取付フレームの取付面が面一となるように形成したことから、簡単に組立ができると共に、係合孔部と係合突部に設けられた第１及び第２の直線部と第１及び第２の傾斜面とによって容易に外部端子の取付面と取付フレームの取付面とを面一にすることができる。
【００３６】
また、第１の直線部と外部端子の取付面までの距離と、第２の直線部と取付フレームの取付面までの距離とが同一距離となるように形成されていることから、組立時に容易に、外部端子の取付面と取付フレームの取付面とを面一にすることが可能となる。
【００３７】
また、弾性部材は、ドーム状のラバースプリングで形成したことから、操作部材を付勢する弾性部材と、ハウジングと取付フレームとの間に介在する弾性部材とを兼用できるため、構成が簡易となり、安価対応が可能となる。
【００３８】
また、操作部材を、ラバーステムで形成すると共に、このラバーステムの鍔部を弾性部材として形成したことから、このラバーステムの鍔部をハウジングの上面と取付フレームの内面との間に挟持することで、簡易な構造で防塵構造が図れる。
【図面の簡単な説明】
【図１】本発明の１実施例であるハウジングの一部を破断した状態を示す押釦スイッチの平面図である。
【図２】本発明の同じく押釦スイッチを示す正面図である。
【図３】本発明の同じく押釦スイッチを示す側面図である。
【図４】本発明の他の実施例であるハウジングの一部を破断した状態を示す押釦スイッチの平面図である。
【図５】本発明の同じく押釦スイッチを示す正面図である
【図６】本発明の同じく押釦スイッチを示す側面図である。
【符号の説明】
１ハウジング
１ａ収納部
１ｂ係合突部
１ｃ第１の直線部
１ｄ第１の傾斜面
１ｅ押圧突起
２固定端子
２ａ外部端子
２ｂ固定接点
２ｃ取付面
３ラバースプリング（弾性部材）
３ａスカート部
３ｂ作動部
３ｃ作動突部
４可動接点
５操作部材
５ａ操作部
５ｂ押圧面部
５ｃ鍔部
６取付フレーム
６ａ挿通孔
６ｂ側板
６ｃ取付面
６ｄ係合孔部
６ｅ第２の直線部
６ｆ第２の傾斜面
７ラバーステム（弾性部材）
７ａ操作部
７ｂ押圧突部
７ｃ鍔部
８可動接点[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure of a push button switch used as an operation switch for various electronic devices, and more particularly to a structure of a side push operation type push button switch used for surface mounting on a circuit board.
[Prior art]
The structure of the push button switch of the side push operation type used for the conventional surface mounting is as follows. The housing is formed in a box shape having an accommodating portion in the inside with an insulating material such as synthetic resin, and the accommodating portion of this housing. A fixed contact made of a conductive metal material disposed on the inner bottom surface of the metal plate, a movable contact formed in a dome shape from the same conductive metal material disposed opposite to the fixed contact, An operation member that is slidable in a laterally pushing direction in a housing portion of the housing, presses the movable contact to contact and separate from the fixed contact, and an attachment attached to the housing so as to cover the housing portion of the housing An external terminal having a flat mounting surface that protrudes from the bottom surface side of the housing, and a mounting leg that has a flat mounting surface provided on the lower end side of the mounting frame. Those of the formed structure so as to fix and soldered on the same plane of the plate is generally known.
[0003]
Further, separately from this, the movable contact is formed by fixing a carbon contact to the lower end portion of the rubber spring, and the top of the rubber spring is pressed by the operation member arranged in the housing portion of the housing, A structure in which the movable contact is formed so as to be in contact with and away from the fixed contact in accordance with the reversing operation of the rubber spring is generally known.
[0004]
[Problems to be solved by the invention]
However, in the above-described structure of the conventional side push operation type push button switch, the housing and the mounting frame are latched by a protrusion formed on the housing and a window hole formed on the mounting frame. Therefore, a backlash occurs due to a dimensional difference between the projection and the window hole, the height of the mounting surface of the switch varies, and the mounting surface of the external terminal and the mounting frame There was a problem that the mounting surface could not be flush.
[0005]
Therefore, the present invention solves the above-mentioned problems and can be easily assembled, and the mounting surface of the external terminal and the mounting surface of the mounting frame can be flush with each other. It is an object of the present invention to provide a structure of a side push operation type push button switch that can be reliably performed.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, in the present invention, as a first means, a housing, a bottom surface portion provided on the housing for mounting on a circuit board, and one of the bottom surfaces formed upright from the bottom surface portion are provided. A U-shaped side wall provided with an opening on a side surface, a storage part surrounded by the side wall, a fixed contact disposed on an inner wall surface facing the opening in the storage part, and the fixed contact from an external pin which is derived by projecting the bottom side, an operating member provided to be push protrudes from the opening of the housing, the direction of projecting the operating member from the opening of the housing An elastic member to be urged; and an attachment frame having a side plate engaged with a side wall of the housing so as to cover the housing portion of the housing while the operation member or the elastic member is in contact with the external member and the external terminal A mounting surface for surface mounting to a circuit board having a planar shape is formed at an end of the mounting frame on the bottom surface side of the housing, and the housing and the mounting frame are made elastic by the elasticity of the elastic member. The side walls of the housing are urged in a direction that repels each other, and an engaging portion is formed of a protrusion provided with an inclined surface at one end, and an inclined surface is provided at one end of the side plate of the mounting frame. An engagement portion comprising a hole is formed, and an engagement portion provided on the side wall of the housing is engaged with an engagement portion provided on a side plate of the mounting frame, and provided on the side wall of the housing. The engaging portion provided on the side plate of the mounting frame is engaged with the inclined surface provided on the protrusion and the inclined surface provided on the hole . And the biasing force of the elastic member The engaging portion of the housing is shifted toward the mounting surface of the mounting frame along the inclined surface, whereby the mounting surface of the external terminal to the circuit board and the mounting surface of the mounting frame to the circuit board Are guided in a direction that is flush with each other.
[0007]
As a second means, on the side wall of the housing, a first straight portion parallel to the attachment surface on the attachment surface side, and a direction in which the operation member protrudes while facing the first straight portion. An engaging projection having a first inclined surface that is narrow in the opposite direction, and a side plate of the mounting frame has a second straight portion corresponding to the first straight portion, and An engagement hole having a second inclined surface corresponding to the first inclined surface, and the first and second inclined surfaces are in sliding contact with the urging force of the elastic member. And the second linear portion is in contact with each other so that the mounting surface of the external terminal and the mounting surface of the mounting frame are flush with each other.
[0008]
As a third means, the distance between the first straight portion and the mounting surface of the external terminal is the same as the distance between the second straight portion and the mounting surface of the mounting frame. It is formed as follows.
[0009]
As a fourth means, the elastic member is formed of a dome-shaped rubber spring.
[0010]
Further, as a fifth means, the operation member is formed of a rubber stem, and a collar portion of the rubber stem is formed as the elastic member.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the push button switch of the present invention is shown in FIGS. FIG. 1 is a plan view of a pushbutton switch with a part of the housing broken, FIG. 2 is a front view of the pushbutton switch, and FIG. 3 is a side view of the pushbutton switch.
[0012]
The housing 1 is formed of an insulating material such as synthetic resin, and has a storage portion 1a that is bottomed and has a side surface that is open and formed in a box shape.
A fixed terminal 2 formed of a conductive metal material such as brass is integrally formed and disposed in the housing 1 by a method such as insert molding.
The fixed terminal 2 is embedded in the housing 1 and is exposed to the external terminal 2a projecting outward from the housing 1 and the inner wall surface of the storage portion 1a, and is arranged with a certain gap therebetween. It comprises a pair of fixed contacts 2b provided.
[0013]
The external terminal 2a projecting outward from the housing 1 is bent sideways at the bottom surface of the housing 1 to form a mounting surface 2c that is flush with the bottom surface of the housing 1. Yes. Since the front end of the external terminal 2a is bent at the bottom surface of the housing 1 to form the mounting surface 2c, the push button switch using the housing 1 can be mounted on the circuit board. Yes.
[0014]
Engaging protrusions 1b that engage with engaging holes 6d of the mounting frame 6 described later are formed on opposite side walls of the housing 1. The engagement protrusion 1b includes a first straight portion 1c parallel to the mounting surface 2c of the external terminal 2a, and a direction in which the storage portion 1a opens while facing the first straight portion 1c. A first inclined surface 1d that is narrow in the opposite direction is formed. The engagement protrusion 1b having the first straight portion 1c and the first inclined surface 1d engages with an engagement hole 6d of the attachment frame 6 described later, whereby the attachment surface 2c of the external terminal 2 is engaged. And a mounting surface 6c of the mounting frame 6 to be described later can be made flush with each other.
[0015]
The rubber spring 3 is formed of a flexible elastomer or silicone rubber and has a dome shape whose outer shape is an opening on the lower surface. The rubber spring 3 is bent when the operation member 5 described later is pushed in and returned to give an elastic force. Skirt portion 3a and an operating portion 3b formed on the upper portion of the skirt portion 3a.
An operating projection 3c is formed on the lower surface side of the operating portion 3b, and a movable contact 4 made of conductive carbon or the like is fixed to the tip of the operating projection 3c, and the movable contact 4 is fixed to the fixed portion. The rubber spring 3 is disposed on the inner wall surface of the storage portion 1a in a state facing the contact 2b.
[0016]
The operation member 5 is formed in a substantially rectangular shape with an insulating material such as a synthetic resin, and on the upper surface side thereof, a slightly smaller planar operation portion 5a operated by a human finger or the like is provided. On the lower surface side facing the operation portion 5a, a pressing surface portion 5b is formed which contacts the upper surface of the operation portion 3b of the rubber spring 3 and bends the rubber spring 3 toward the fixed contact 2b. Further, a flange portion 5c is formed on the peripheral surface portion of the operation member 5, and when the operation member 5 is returned to movement, the flange portion 5c abuts on a mounting frame 6 described later, whereby the operation member 5 is Jumping out of the housing 1 is restricted.
[0017]
The rubber spring 3 is housed in the housing portion 1a of the housing 1 as an elastic member, and the operation member 5 is constantly urged by the rubber spring 3 in a direction protruding from the housing 1. . And the collar part 5c of the said operation member 5 is pressed by the inner surface of the attachment frame 6 mentioned later by the urging | biasing force of the said rubber spring 3. As shown in FIG.
[0018]
The mounting frame 6 is formed in a substantially U shape with a flat metal plate, and an insertion hole 6 a through which the operation portion 5 a of the operation member 5 is inserted is provided in the center of the mounting frame 6. The attachment frame 6 is attached to the opening of the housing portion 1 a of the housing 1 to prevent the rubber spring 3 and the operation member 5 from jumping out. Further, a mounting surface 6c is formed at the lower ends of the pair of side plates 6b facing the mounting frame 6 so as to be horizontally bent sideways to be flush with the bottom surface of the housing 1. By providing 6c, it is possible to mount the push button switch on the circuit board.
[0019]
In addition, an engagement hole 6 d that engages with the engagement protrusion 1 b of the housing 1 is formed in the pair of side plates 6 b that face the mounting frame 6. The engaging hole 6d has a second straight part 6e parallel to the mounting surface 6c of the side plate 6b, and the second straight part 6e opposite to the direction in which the operation member 5 protrudes. A second inclined surface 6f that is narrow in the direction is formed. The engaging protrusion 6d having the second straight portion 6e and the second inclined surface 6f is the engaging protrusion having the first straight portion 1c and the first inclined surface 1d of the housing 1. By engaging with 1b, the mounting surface 2c of the external terminal 2a and the mounting surface 6c of the mounting frame 6 can be made flush with each other.
[0020]
In order to assemble the pushbutton switch having the above-described configuration, first, the rubber spring 3 to which the movable contact 4 is fixed is accommodated so as to face the fixed contact 2b in the accommodating portion 1a of the housing 1. Next, the operation member 5 is disposed in contact with the operating portion 3 b of the rubber spring 3. Next, the assembly is completed by attaching the attachment frame 6 to the housing 1 so as to cover the storage portion 1a of the housing 1 with the operation portion 5a of the operation member 5 protruding from the insertion port 6a.
[0021]
In this case, the engagement between the housing 1 and the attachment frame 6 is engaged by the engagement protrusion 1 b provided in the housing 1 and the engagement hole 6 d provided in the attachment frame 6. Has become. At this time, the engaging protrusion 1b of the housing 1 is opposed to the first linear portion 1c parallel to the mounting surface 2c on the mounting surface 2c side, and the first linear portion 1c, and The first inclined surface 1d narrowed in the direction opposite to the direction in which the operation portion 5a protrudes is formed, and the engagement hole 6d of the mounting frame 6 has the first inclined surface 1d. A second straight portion 6e corresponding to the straight portion 1c and a second inclined surface 6f corresponding to the first inclined surface 1d are formed.
[0022]
The rubber spring 3, which is an elastic member, is disposed between the housing 1 and the mounting frame 6 via the operation member 5. The housing 1 and the mounting frame 6 are connected to the rubber spring 3. Because of this elasticity, the first and second inclined surfaces 1d and 6f are brought into sliding contact with each other by the biasing force. At this time, the first inclined surface 1d of the engaging projection 1b of the housing 1 is slidably moved in the direction in which the second inclined surface 6f of the engaging hole 6d of the mounting frame 6 becomes narrower. Therefore, the engagement protrusion 1b is shifted toward the attachment surface 6c of the attachment frame 6 along the second inclined surface 6f, whereby the first linear portion of the engagement protrusion 1b. 1c and the second straight part 6e of the engagement hole 6d come into contact with each other.
[0023]
In addition, the distance between the first straight portion 1c and the mounting surface 2c of the external terminal 2a is the same as the distance between the second straight portion 6e and the mounting surface 6c of the mounting frame 6. When the first straight portion 1c and the second straight portion 6e are in contact with each other, the mounting surface 2c of the external terminal 2a and the mounting surface 6c of the mounting frame 6 are flush with each other. It comes to become.
[0024]
In the above embodiment, the rubber spring 3 as an elastic member is interposed between the housing 1 from which the external terminal 2a is projected and the mounting frame 6 that engages with the housing 1, and the external terminal 2a and the lower end of the mounting frame 6 are formed with the mounting surfaces 1c and 6c for surface mounting on a circuit board having a planar shape, and the rubber spring is formed at the engaging portion between the housing 1 and the mounting frame 6 3 is slidably engaged by the urging force of 3, and guides the mounting surface 2c of the external terminal 2a to the circuit board and the mounting surface 6c of the mounting frame 6 to the circuit board to be flush with each other. Since the first and second inclined surfaces 1d and 6f are formed, the height of the mounting surface of the switch is reduced due to the backlash caused by the dimensional difference between the engaging portions of the housing 1 and the mounting frame 6. The mounting surface 2c of the external terminal 2a and the mounting surface 6c of the mounting frame 6 can be made flush with each other, and surface mounting on the circuit board can be performed reliably. It has become.
[0025]
The housing 1 and the attachment frame 6 are engaged with each other by the engagement protrusion 1 b provided on the housing 1 and the engagement hole 6 d provided on the attachment frame 6. Therefore, the assembly can be easily performed, and the first and second straight portions 1c and 6e provided in the engagement protrusion 1b and the engagement hole 6d and the first and first With the two inclined surfaces 1d and 6f, the mounting surface 2c of the external terminal 2a and the mounting surface 6c of the mounting frame 6 can be easily flush with each other.
[0026]
In addition, the distance between the first straight portion 1c and the mounting surface 2c of the external terminal 2a is the same as the distance between the second straight portion 6e and the mounting surface 6c of the mounting frame 6. Thus, the mounting surface 2c of the external terminal 2a and the mounting surface 6c of the mounting frame 6 can be easily flush with each other during assembly.
[0027]
In addition, the elastic member that biases the operation member 5 and the elastic member that is interposed between the housing 1 and the mounting frame 6 are configured to be combined with the rubber spring 3 having a dome shape. Is simple and inexpensive.
[0028]
4 to 6 show another embodiment of the push button switch of the present invention, FIG. 4 is a plan view of the push button switch in a state where a part of the housing is broken, FIG. 5 is a front view of the push button switch, and FIG. It is a side view. Note that the same components described in FIGS. 1 to 3 are denoted by the same reference numerals and description thereof is omitted.
[0029]
The difference from the above embodiment is that a rubber stem 7 made of a flexible elastomer or silicone rubber is used instead of the operation member 5 made of a synthetic resin, and this rubber stem 7 is connected to the housing 1 and the housing 1. The point is that the elastic member is interposed between the mounting frame 6 and the rubber spring 3 instead of the dome-shaped movable contact 8 made of a metal plate.
[0030]
The rubber stem 7 is formed of a flexible elastomer or silicone rubber, and the rubber stem 7 is provided with a rectangular operation portion 7a that is operated by a human finger or the like on the upper surface side thereof. ing. A pressing protrusion 7b is formed on the lower surface facing the operation portion 7a. The pressing protrusion 7b contacts the dome-shaped top of the movable contact 8 and bends the top toward the fixed contact 2b. A flange portion 7 c is formed on the peripheral surface portion of the rubber stem 7, and the flange portion 7 c is sandwiched between the upper surface of the housing portion 1 a opened in the housing 1 and the inner surface of the mounting frame 6. Thus, the operation portion 7a protrudes from the insertion hole 6a and is accommodated in the housing 1. Further, a pressing protrusion 1e is provided on the upper surface of the housing 1, and the rubber stem 7 is positioned and prevented from popping out by pressing the flange portion 7c of the rubber stem 7 with the pressing protrusion 1e.
[0031]
In addition, the rubber stem 7 has an elastic member in which the flange portion 7c is sandwiched between the housing 1 and the mounting frame 6, and is urged in a repulsive direction by the elasticity of the flange portion 7c. Therefore, the first and second inclined surfaces 1d and 6f are brought into sliding contact with each other by this urging force. At this time, the first inclined surface 1d of the engaging projection 1b of the housing 1 is slidably moved in the direction in which the second inclined surface 6f of the engaging hole 6d of the mounting frame 6 becomes narrower. Therefore, the engagement protrusion 1b is shifted toward the attachment surface 6c of the attachment frame 6 along the second inclined surface 6f, whereby the first linear portion of the engagement protrusion 1b. 1c and the second straight portion 6e of the engagement hole 6d come into contact with each other.
[0032]
Also in the above-described embodiment, the flange portion 7c of the rubber stem 7 which is an elastic member is interposed between the housing 1 from which the external terminal 2a is protruded and the mounting frame 6 engaged with the housing 1. The mounting surfaces 2c and 6c for surface mounting on a planar circuit board are formed at the lower ends of the external terminals 2a and the mounting frame 6, and the engaging portion between the housing 1 and the mounting frame 6 is formed. The mounting surface 2c of the external terminal 2a to the circuit board and the mounting surface 6c of the mounting frame 6 to the circuit board are engaged with each other by the urging force of the flange portion 7c of the rubber stem 7. Since the inclined surfaces 1d and 6f for guiding in the direction that is flush with each other are formed, the height of the mounting surface of the switch due to the backlash caused by the dimensional difference of the engaging portion between the housing 1 and the mounting frame 6 Gaba The mounting surface 2c of the external terminal 2a and the mounting surface 6c of the mounting frame 6 can be flush with each other, and surface mounting on the circuit board can be performed reliably. Thus, the same effect as the embodiment shown in FIGS. 1 to 3 can be obtained.
[0033]
Further, the operation member 5 is formed by the rubber stem 7 which is a flexible elastic member, and the flange portion 7c of the rubber stem 7 is formed between the upper surface of the housing 1 and the inner surface of the mounting frame 6. Therefore, a dustproof structure can be achieved with a simple structure.
[0034]
【The invention's effect】
As described above, the pushbutton switch of the present invention has an elastic member interposed between the housing from which the external terminal protrudes and the mounting frame that engages with the housing, and is flat on the lower end of the external terminal and the mounting frame. A mounting surface for surface mounting on the circuit board is formed, and is engaged with the engaging portion between the housing and the mounting frame so as to be slidable by the biasing force of the elastic member, and the external terminal is mounted on the circuit board. Since the inclined surface that guides the surface and the mounting surface of the mounting frame to the circuit board to be flush with each other is formed, the mounting of the switch due to the backlash caused by the dimensional difference of the engaging part between the housing and the mounting frame The height of the surface does not vary, and the mounting surface of the external terminal and the mounting surface of the mounting frame can be made flush with each other, so that surface mounting on the circuit board can be performed reliably.
[0035]
In addition, the side wall of the housing has a first linear portion parallel to the mounting surface on the mounting surface side, and is opposed to the first linear portion, and is narrow in a direction opposite to the direction in which the operation member protrudes. An engagement protrusion having a first inclined surface is formed, and a second linear portion corresponding to the first linear portion and a second corresponding to the first inclined surface are formed on the side plate of the mounting frame. The first and second linear portions are brought into contact with each other when the first and second inclined surfaces are slidably contacted with each other by the urging force of the elastic member. Since the surface and the mounting surface of the mounting frame are formed so as to be flush with each other, the assembly can be easily performed, and the first and second linear portions provided in the engaging hole and the engaging protrusion and the first And the mounting surface of the external terminal and the mounting surface of the mounting frame can be easily made flush with the second inclined surface.
[0036]
In addition, since the distance between the first straight portion and the mounting surface of the external terminal is the same as the distance between the second straight portion and the mounting surface of the mounting frame, it is easy to assemble. In addition, the mounting surface of the external terminal and the mounting surface of the mounting frame can be flush with each other.
[0037]
In addition, since the elastic member is formed of a dome-shaped rubber spring, the structure can be simplified because the elastic member that urges the operation member and the elastic member interposed between the housing and the mounting frame can be used together. Inexpensive response is possible.
[0038]
In addition, since the operation member is formed of a rubber stem and the collar portion of the rubber stem is formed as an elastic member, the collar portion of the rubber stem is sandwiched between the upper surface of the housing and the inner surface of the mounting frame. Thus, a dustproof structure can be achieved with a simple structure.
[Brief description of the drawings]
FIG. 1 is a plan view of a pushbutton switch showing a state in which a part of a housing according to an embodiment of the present invention is broken.
FIG. 2 is a front view showing the same push button switch of the present invention.
FIG. 3 is a side view showing the same push button switch of the present invention.
FIG. 4 is a plan view of a pushbutton switch showing a state in which a part of a housing according to another embodiment of the present invention is broken.
FIG. 5 is a front view showing the same push button switch of the present invention. FIG. 6 is a side view showing the same push button switch of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Housing 1a Storage part 1b Engaging protrusion 1c 1st linear part 1d 1st inclined surface 1e Pressing protrusion 2 Fixed terminal 2a External terminal 2b Fixed contact 2c Mounting surface 3 Rubber spring (elastic member)
3a Skirt portion 3b Actuation portion 3c Actuation protrusion 4 Movable contact 5 Operation member 5a Operation portion 5b Press surface portion 5c Gutter portion 6 Attachment frame 6a Insertion hole 6b Side plate 6c Attachment surface 6d Engagement hole portion 6e Second linear portion 6f Second Inclined surface 7 Rubber stem (elastic member)
7a Operation part 7b Pressing protrusion 7c Ridge part 8 Movable contact

Claims

A housing, a bottom surface portion provided on the housing for attachment to the circuit board, a U-shaped side wall formed upright from the bottom surface portion and having an opening on one side surface; a storage portion surrounded by side walls, in the housing portion, the opening and opposite the fixed contact disposed on inner wall surface, the external pin which is derived by projecting from the fixed contact to said bottom portion When an operation member provided to be push protrudes from the opening of the housing, and an elastic member for urging in a direction to protrude the operation member from the opening of the housing, said operating member or elastic member abuts And an attachment frame having a side plate that engages with the side wall of the housing so as to cover the housing portion of the housing, and at the end of the external terminal and the attachment frame on the bottom surface side of the housing. Has mounting surfaces for surface mounting to a circuit board made of flat shape is formed, the mounting frame and the housing, the biased direction to repel each other by the elasticity of the elastic member, the side wall of the housing An engaging portion made of a protrusion provided with an inclined surface at one end is formed, and an engaging portion made of a hole provided with an inclined surface at one end is formed on the side plate of the mounting frame . The engaging portion provided on the side wall and the engaging portion provided on the side plate of the mounting frame are engaged, and the engaging portion provided on the side wall of the housing and the side plate of the mounting frame are provided. The engaging portion is engaged so that the inclined surface provided in the projecting portion and the inclined surface provided in the hole portion can be slidably contacted, and the engagement of the housing by the biasing force of the elastic member The portion along the inclined surface By being offset in the direction of the mounting surface of the attached frame, the mounting surface of the external terminal to the circuit board and the mounting surface of the mounting frame to the circuit board are guided in the same direction. Push button switch to do.

The side wall of the housing has a first straight portion parallel to the mounting surface on the mounting surface side, and a width opposite to the first straight portion and in a direction opposite to the direction in which the operation member protrudes. An engaging protrusion having a first inclined surface, and a second straight portion corresponding to the first straight portion on the side plate of the mounting frame, and the first inclined surface. An engagement hole portion having a corresponding second inclined surface is formed, and the first and second linear portions are brought into contact with each other by the sliding contact between the first and second inclined surfaces by the urging force of the elastic member. 2. The pushbutton switch according to claim 1, wherein the mounting surface of the external terminal and the mounting surface of the mounting frame are in contact with each other.

The distance between the first straight portion and the mounting surface of the external terminal is the same as the distance between the second straight portion and the mounting surface of the mounting frame. 3. The push button switch according to claim 2, wherein

4. The pushbutton switch according to claim 1, wherein the elastic member is formed of a dome-shaped rubber spring.

The pushbutton switch according to any one of claims 1 to 3, wherein the operation member is formed of a rubber stem, and a collar portion of the rubber stem is formed as the elastic member.