JP3621238B2

JP3621238B2 - Push switch

Info

Publication number: JP3621238B2
Application number: JP22269297A
Authority: JP
Inventors: 正夫大北
Original assignee: Alps Electric Co Ltd
Current assignee: Alps Alpine Co Ltd
Priority date: 1997-08-19
Filing date: 1997-08-19
Publication date: 2005-02-16
Anticipated expiration: 2017-08-19
Also published as: JPH1167006A

Description

【０００１】
【発明の属する技術分野】
本発明はプッシュ・プッシュ型で、ハート型カム溝を用いたプッシュスイッチに関する。
【０００２】
【従来の技術】
従来のハート型カム溝を使用したプッシュスイッチは、図８〜図１０に示すように、金属製の箱形の枠体２１は、上壁２１ａに設けられた丸孔２１ｂと、前壁２１ｃに設けられた角溝２１ｄとを有している。
また、金属板から成るバネ板２２は、平板状の基部２２ａから切り起こしされたバネ部２２ｂを有し、このバネ板２２は、枠体２１内に収納され、その基部２１ａを上壁２１ａに重ね合わした状態で、枠体２１に取り付けられている。
また、円柱状の金属棒を折り曲げして形成されてＺ型をなす駆動ピン２３は、中央に位置する水平部２３ａと、水平部２３ａの一端から上方に折り曲げられた折り曲げ部２３ｂと、水平部２３ａの他端から下方に折り曲げられた折り曲げ部２３ｃとを有している。
そして、この駆動ピン２３は、枠体２１内に位置させ、水平部２３ａをバネ板２２のバネ部２２ｂに当接させた状態で、折り曲げ部２３ｂを上壁２１ａの丸孔２１ｂに挿通して、折り曲げ部２３ｂを支点として他方の折り曲げ部２３ｃが回動するように、枠体２１に取り付けられている。
【０００３】
また、合成樹脂の成型品から成る可動体２４は、操作部２４ａと、可動接片（図示せず）を収納する収納部２４ｂと、収納部２４ｂの上面に形成されたハート型カム溝２５とを有している。
そして、このハート型カム溝２５は、特に図１０で示すように、第１のＶ字状溝部２５ａと、第２のＶ字状溝部２５ｂと、第１と第２のＶ字状溝部２５ａ、２５ｂを繋ぐ溝部２５ｃ、２５ｄと、ハート型カム溝２５の外形を形成する外壁２５ｅと、ハート型カム溝２５の内形を形成する内壁２５ｆと、溝の底壁２５ｇに設けられた４個の段部２５ｈとで構成されている。
そして、可動体２４は、操作部２４ａを枠体２１の角溝２１ｄ内に位置させると共に、収納部２４ｂを枠体２１内に収納する。
この時、駆動ピン２３の折り曲げ部２３ｃは、ハート型カム溝２５内に位置した状態にしてある。
【０００４】
また、絶縁基板２６には複数個の固定接片２７が固着され、この絶縁基板２６は、枠体２１の下方開口部を覆うように配置され、絶縁基板２６は枠体２１に適宜手段によって固定されている。
そして、この時、固定接片２７は可動体２４に収納された可動接片（図示せず）と接離可能になると共に、バネ板２２のバネ部２２ｂで押圧された駆動ピン２３の折り曲げ部２３ｃの先端部は、ハート型カム溝２５の底壁２５ｇに当接した状態となっている。
また、コイル状のバネ２８が、前壁２１ｃと操作部２４ａとの間に取り付けられて、このバネ２８によって、可動体２４が常時前方に弾圧された状態となっている。
【０００５】
そして、このようなプッシュスイッチは、可動体２４の操作部２４ａをバネ２８の弾性に抗して押圧し、可動体２４が押し込まれた状態の第１の位置になると、可動接片が固定接片２７と接離して接点の切り換えが行われ、また、操作部２４ａがバネ２８によって、押し圧前の状態に押し戻された状態の第２の位置になると、可動接片が固定接片２７と接離して接点の切り換えが行われるようになる。
そして、次に、可動体２４の操作に伴うハート型カム溝２５と駆動ピン２３の動作を図１０に基づいて説明すると、可動体２４がバネ２８によって押し戻された第２の位置においては、駆動ピン２３は第２のＶ字状溝部２５ｂのＰ１の位置にあって、その折り曲げ部２３ｃが外壁２５ｅに係合し、バネ２８による可動体２４の移動を停止していると共に、折り曲げ部２３ｃの先端部は、バネ板２２の押圧によって、底壁２５ｇに当接した状態となっている。
【０００６】
この状態において、可動体２４をバネ２８に抗して押圧、即ち、矢印Ｘ方向に移動すると、折り曲げ部２３ｃの先端部が底壁２５ｇをこすりながら、駆動ピン２３が内壁２５ｆに当接し、駆動ピン２３が折り曲げ部２３ｂを支点として、内壁２５ｆに沿って回動しながらＰ２の位置となる。
更に、矢印Ｘ方向に移動を続けると、駆動ピン２３は段部２５ｈに落ちてＰ３の位置になると共に、可動体２４の矢印Ｘ方向の移動がストップし、可動体２４の押圧を解除すると、可動体２４はバネ２８により矢印Ｙ方向に押し戻される。この時、駆動ピン２３は回動しながら段部２５ｈに沿って第１のＶ字状溝部２５ａに位置すると共に、内壁２５ｆに当接したＰ４の位置となり、これによって、可動体２４の移動が停止して、可動体２４は押し込まれた状態の第１の位置となる。
【０００７】
また、この状態で、再度、可動体２４をバネ２８に抗して押圧すると、可動体２４は矢印Ｘ方向に移動し、すると、駆動ピン２３は段部２５ｈに落ちてＰ５の位置になると共に、可動体２４の矢印Ｘ方向の移動がストップする。
そして、可動体２４の押圧を解除すると、可動体２４はバネ２８により矢印Ｙ方向に押し戻される。
この時、駆動ピン２３は、回動しながら段部２５ｈと内壁２５ｆに沿って移動して、段部２５ｈに落ちたＰ６の位置となり、更に、矢印Ｙ方向に可動体２４が移動すると、駆動ピン２３は外壁２５ｅに当接し、外壁２５ｅに沿って回動すると共に、段部２５ｈに落ちた状態を経て、スタート時のＰ１の位置となる。
このように、可動体２４のプッシュ・プッシュの操作によって、プッシュスイッチの切り換えを行うものである。
【０００８】
【発明が解決しようとする課題】
従来のハート型カム溝を使用したプッシュスイッチは、Ｚ型の駆動ピン２３の折り曲げ部２３ｃが可動体２４のハート型カム溝２５と係合して、バネ２８からの押圧力を受け止めるようになっているため、駆動ピン２３は強度を大きくするために太いものを使用する必要があり、このため、駆動ピン２３が大きくなると共に、これを受け入れるハート型カム溝２５も大きくなって、プッシュスイッチが大型に成るという問題がある。
また、駆動ピン２３の動作を確実にするために、駆動ピン２３をハート型カム溝２５の底壁２５ｇに押圧するバネ板２２を必要とし、このため、部品点数が多くなって、コスト高となるばかりか、生産性が悪いという問題がある。
また、駆動ピン２３がハート型カム溝２５の底壁２５ｇ上を擦るようになっているため、可動体２４の移動感触が悪くなる上に、擦れによって、その寿命が短いという問題がある。
また、駆動ピン２３は、Ｚ型となし、回動運動させるために折り曲げ部２３ｂを枠体２１の小さな丸孔２１ｂに挿入せねば成らず、その挿入作業が面倒で、生産性が悪く、また、駆動ピン２３は強度の点から金属製のものを使用せねば成らず、しかも、Ｚ型の加工が必要で、加工性が悪いという問題がある。
【０００９】
【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、バネで弾圧され、Ｖ字状溝部を設けたハート型カム溝、及び係止部を有する可動体と、前記ハート型カム溝内に位置するピン部、及び係止部を有する駆動体とを備え、前記可動体は、前記バネに抗して押し込まれた状態の第１の位置と、前記バネで押し戻された状態の第２の位置とに移動可能で、前記可動体が前記第１の位置にある時、前記駆動体の前記ピン部が前記ハート型カム溝の前記Ｖ字状溝部に位置すると共に、前記可動体の前記係止部と前記駆動体の前記係止部とが当接するようにした構成とした。
また、第２の解決手段として、前記駆動体を板状の合成樹脂で形成し、前記可動体の移動方向に対して直角方向に前記駆動体を移動可能にした構成とした。
また、第３の解決手段として、前記可動体には前記Ｖ字状溝部に隣接して前記係止部を設け、また、前記駆動体には前記ピン部に隣接して前記係止部を設けた構成とした。
また、第４の解決手段として、前記可動体が前記第１の位置にある時、前記ピン部の側部を前記ハート型カム溝の内壁に当接させるようにした構成とした。
また、第５の解決手段として、前記可動体には複数個の前記係止部を設け、また、前記駆動体には複数個の前記係止部を設けて、複数個の係止部同志を当接させるようにした構成とした。
【００１０】
また、第６の解決手段として、Ｖ字状溝部を設けたハート型カム溝、及び係止部を有する駆動体と、バネで弾圧され、前記ハート型カム溝内に位置するピン部、及び係止部を有する可動体とを備え、前記可動体は、前記バネに抗して押し込まれた状態の第１の位置と、前記バネで押し戻された状態の第２の位置とに移動可能で、前記可動体が前記第１の位置にある時、前記可動体の前記ピン部が前記駆動体の前記ハート型カム溝の前記Ｖ字状溝部に位置すると共に、前記可動体の前記係止部と前記駆動体の前記係止部とが当接するようにした構成とした。
また、第７の解決手段として、前記駆動体を板状の合成樹脂で形成し、前記可動体の移動方向に対して直角方向に前記駆動体を移動可能にした構成とした。
また、第８の解決手段として、前記駆動体には前記Ｖ字状溝部に隣接して前記係止部を設け、また、前記可動体には前記ピン部に隣接して前記係止部を設けた構成とした。
また、第９の解決手段として、前記可動体が前記第１の位置にある時、前記ピン部の側部を前記ハート型カム溝の内壁に当接させるようにした構成とした。
更に、第１０の解決手段として、前記可動体には複数個の前記係止部を設け、また、前記駆動体には複数個の前記係止部を設けて、複数個の係止部同志を当接させるようにした構成とした。
【００１１】
【発明の実施の形態】
本発明のハート型カム溝を使用したプッシュスイッチを図１〜図７に基づいて説明すると、図１は本発明のプッシュスイッチの要部断面平面図、図２は本発明のプッシュスイッチの要部縦断面図、図３は本発明のプッシュスイッチの分解斜視図、図４は本発明のプッシュスイッチに係る駆動体を裏返した斜視図、図５は本発明のプッシュスイッチに係るハート型カム溝を示す斜視図、図６の（Ａ）、（Ｂ）は本発明のプッシュスイッチの動作を説明するための説明図、図７は本発明のプッシュスイッチの他の実施形態を示す要部断面平面図である。
【００１２】
そして、本発明のハート型カム溝を使用したプッシュスイッチは、図１〜図６に示すように、合成樹脂の成型品から成るの箱形の枠体１は、空洞部１ａと、空洞部１ａの前方の上部に設けられた凹部１ｂとを有している。
また、前記枠体１には、金属板から成る固定接片２が埋設されて取り付けられ、その接触部２ａは空洞部１ａ内に位置すると共に、端子部２ｂが枠体１外に突出した状態となっている。
また、合成樹脂の成型品から成る駆動体３は、矩形状の支持部３ａと、支持部３ａの中央部に設けられた凸状の係止部３ｂと、係止部３ｂ上に隣接して設けられたピン部３ｃとを有している。
そして、この駆動体３は、枠体１の空洞部１ａに連設した凹部１ｂ内に収納し、その係止部３ｂ、及びピン部３ｃを空洞部１ａ側に位置させて、横方向に移動可能に枠体１に取り付けられている。
【００１３】
また、合成樹脂の成型品から成る可動体４は、操作部４ａと、可動接片６を収納する収納部４ｂと、収納部４ｂの上面に設けられた凹部４ｃと、収納部４ｂの上面に形成されたハート型カム溝５とを有している。
そして、このハート型カム溝５は、特に、図５、図６で示すように、第１のＶ字状溝部５ａと、第２のＶ字状溝部５ｂと、第１と第２のＶ字状溝部５ａ、５ｂを繋ぐ直線状の溝部５ｃ、５ｄと、ハート型カム溝５の外形を形成する外壁５ｅと、ハート型カム溝５の内形を形成する内壁２５ｆを有する島状部５ｇと、第１のＶ字状溝部５ａに隣接して島状部５ｇ上に設けられた係止部５ｈとで構成されている。
そして、可動体４は、可動接片６を収納した収納部４ｂを、枠体１の空洞部１ａに挿入して、可動接片６が固定接片２に接離可能となるように、可動体４が移動可能に取り付けられると共に、駆動体３のピン部３ｃをハート型カム溝５内に位置した状態にしてある。
また、駆動体３は、その支持部３ａが枠体１と可動体４とによって挟持され、可動体４の移動方向に対して直角方向に移動可能となっている。
【００１４】
また、金属板から成るコ字状の取付板７は孔７ａを有し、この孔７ａに可動体４の操作部４ａを挿通した状態で、取付板７が枠体１の前面に適宜手段により取り付けられ、この取付板７で、可動体４と駆動体３の抜け止めを行っている。
また、コイル状のバネ８が可動体４の凹部４ｃ内に載置され、可動体４と枠体１の後壁との間に位置させて取り付けられ、このバネ８によって、可動体４は常時前方に弾圧された状態となっている。
【００１５】
そして、このようなプッシュスイッチは、可動体４の操作部４ａをバネ８の弾性に抗して押圧し、可動体４が押し込まれた状態の第１の位置になると、可動接片６が固定接片２と接離して接点の切り換えが行われ、また、操作部４ａがバネ８によって、押し圧前の状態に押し戻された状態の第２の位置になると、可動接片６が固定接片２と接離して接点の切り換えが行われるようになる。
そして、次に、可動体４の操作に伴うハート型カム溝５と駆動体３の動作を図６に基づいて説明すると、可動体４がバネ８によって押し戻された第２の位置においては、駆動体３のピン部３ｃは第２のＶ字状溝部５ｂのＰ１の位置にあって、可動体４の収納部４ｂが取付板７にぶつかって、バネ８による可動体４の前方方向の移動が停止した状態となっている。
【００１６】
この状態において、可動体４をバネ８に抗して押圧、即ち、矢印Ｘ方向に移動すると、ピン部３ｃは傾斜状の内壁５ｆに当接したＰ２の位置となり、この状態で可動体４の移動を続けると、ピン部３ｃは内壁５ｆに沿って移動するため、駆動体３は凹部１ｂ内を、可動体４の移動方向に対して直角方向に移動してＰ３の位置となる。
更に、矢印Ｘ方向に移動を続けると、ピン部３ｃは、直線状の溝部５ｃにガイドされてＰ４の位置となり、この時、ピン部３ｃは傾斜状の外壁５ｅに当接した状態となるため、可動体４の移動を続けると、ピン部３ｃは外壁５ｅに沿って移動してＰ５の位置になると共に、可動体４の矢印Ｘ方向の移動がストップする。そして、可動体４の押圧を解除すると、可動体４はバネ８により矢印Ｙ方向に押し戻され、この時、ピン部３ｃは第１のＶ字状溝部５ａに位置すると共に、傾斜状の内壁５ｆに当接したＰ６の位置となり、次に、この内壁５ｆの傾斜に沿ってＰ７の位置、即ち、第１のＶ字状溝部５ａの最奥の位置まで移動する。
この時、図６（Ｂ）に示すように、駆動体３の係止部３ｂが可動体４の係止部５ｈに当接して、可動体４の移動が停止して、可動体４は押し込まれた状態の第１の位置となる。
また、この時、ピン部３ｃは内壁５ｆに当接した状態となっているが、ピン部３ｃを内壁５ｆに当接させず、係止部３ｂと５ｈとの当接のみでも良い。
このように、駆動体３の係止部３ｂと可動体４の係止部５ｈとの当接によって、バネ８に対する駆動体３のストッパー強度を強くしたものである。
【００１７】
また、この状態で、再度、可動体４をバネ８に抗して押圧すると、可動体４は矢印Ｘ方向に移動し、すると、ピン部３ｃは傾斜状の外壁５ｅに当接したＰ８の状態となり、可動体４が更に移動すると、外壁５ｅの傾斜に沿ってＰ９の位置までピン部３ｃが移動すると共に、この時、可動体４の矢印Ｘ方向の移動がストップする。
そして、可動体４の押圧を解除すると、可動体４はバネ８により矢印Ｙ方向に押し戻され、すると、ピン部３ｃは傾斜状の内壁５ｆに当接したＰ１０の位置となり、更に可動体４が移動すると、内壁５ｆの傾斜に沿ってＰ１１の位置までピン部３ｃが移動する。
また更に、可動体４が移動すると、直線状の溝部５ｄにガイドされてＰ１２の位置となると共に、傾斜状の外壁５ｅに当接した状態となる。
そして更に、矢印Ｙ方向に可動体４が移動すると、ピン部３ｃは傾斜状の外壁２５ｅに沿って第２のＶ字状溝部５ｂ内に移動して、スタート時のＰ１の位置となると共に、可動体４の移動が停止する。
このように、可動体４のプッシュ・プッシュの操作によって、プッシュスイッチの切り換えを行うものである。
なお、駆動体３の係止部３ｂと可動体４の係止部５ｈとの関係は、係止部５ｈの回りを係止部３ｂが移動出来る大きさで、図６（Ｂ）以外は係止部３ｂが係止部５ｈに係合しないようにしてある。
【００１８】
また、図７は本発明の他の実施形態を示し、駆動体３には複数個の係止部３ｂを、また、可動体４には複数個の係止部４ｈを設け、可動体４が押し込まれた第１の位置にある時、複数個の係止部３ｂと５ｈ同志が当接するようにしたもので、その他の構成は上記実施例と同様の構成を有するので、ここでは同一部品に同一番号を付し、その説明は省略する。
【００１９】
また、上記実施例では、駆動体３に係止部３ｂとピン部３ｃとを設け、また、可動体４にハート型カム溝５と係止部５ｈとを設けたもので説明したが、駆動体３にはハート型カム溝と係止部を、また、可動体４には係止部とピン部とを設けたものでも良く、この場合も上記と同様の効果を奏するものである。
【００２０】
【発明の効果】
本発明のプッシュスイッチは、可動体４がバネ８に抗して押し込まれた第１の位置にある時、駆動体３の係止部３ｂと可動体４の係止部５ｈとが当接するようにしたため、ピン部３ｃへのバネ８による力が軽減され、ピン部３ｃを細くできると共に、ハート型カム溝５を小さくでき、従って、小型のプッシュスイッチを提供できる。
また、従来のようなバネ板２２が不要となり、安価で生産性の良好なものを提供できる。
また、ピン部３ｃはハート型カム溝５の底壁を擦ることが無く、従って、可動体４の移動感触の良好なものを提供できる。
また、駆動体３を合成樹脂で形成したものであるため、従来の金属製のＺ型の駆動ピン２３に比してその生産性が良好となり、安価なもを提供できる。
また、駆動体３が可動体４の移動方向に対して直角方向に移動可能としたため、従来のように折り曲げ部２３ｂを小さな丸孔２１ｂに挿入する作業が不要となり、生産性の良いものを提供できる。
また、可動体４には第１のＶ字状溝部５ａに隣接して係止部５ｈを設けると共に、駆動体３にはピン部３ｃに隣接して係止部３ｃを設けたものであるため、小型でストッパー強度の大きなものを提供できる。
また、駆動体３が第１のＶ字状溝部５ａにある時、ピン部３ｃの側部を内壁５ｆに当接させるようにしたため、ピン部３ｃの動きを確実に出来、正確なプッシュ・プッシュ動作が得られる。
また、可動体４と駆動体３にそれぞれ複数個の係止部５ｈ，３ｃを設けて、複数個の係止部同志を当接させるようにしたため、ストッパー強度をより大きく出来るものである。
【００２１】
また、駆動体３にはハート型カム溝と係止部を、また、可動体４にはピン部と係止部とを設け、可動体４がバネ８に抗して押し込まれた第１の位置にある時、駆動体３の係止部と可動体４の係止部とが当接するようにしたため、ピン部へのバネ８による力が軽減され、ピン部を細くできると共に、ハート型カム溝を小さくでき、従って、小型のプッシュスイッチを提供できる。
また、従来のようなバネ板２２が不要となり、安価で生産性の良好なものを提供できる。
また、ピン部はハート型カム溝の底壁を擦ることが無く、従って、可動体４の移動感触の良好なものを提供できる。
また、駆動体３を合成樹脂で形成したものであるため、従来の金属製のＺ型の駆動ピン２３に比してその生産性が良好となり、安価なもを提供できる。
また、駆動体３が可動体４の移動方向に対して直角方向に移動可能としたため、従来のように折り曲げ部２３ｂを小さな丸孔２１ｂに挿入する作業が不要となり、生産性の良いものを提供できる。
また、駆動体３には第１のＶ字状溝部に隣接して係止部を設けると共に、可動体４にはピン部に隣接して係止部を設けたものであるため、小型でストッパー強度の大きなものを提供できる。
また、可動体４が第１のＶ字状溝部にある時、ピン部の側部をハート型カム溝の内壁に当接させるようにしたため、ピン部の動きを確実に出来、正確なプッシュ・プッシュ動作が得られる。
また、可動体４と駆動体３にそれぞれ複数個の係止部を設けて、複数個の係止部同志を当接させるようにしたため、ストッパー強度をより大きく出来るものである。
【図面の簡単な説明】
【図１】本発明のプッシュスイッチの要部断面平面図。
【図２】本発明のプッシュスイッチの要部縦断面図。
【図３】本発明のプッシュスイッチの分解斜視図。
【図４】本発明のプッシュスイッチに係る駆動体を裏返した斜視図。
【図５】本発明のプッシュスイッチに係るハート型カム溝を示す斜視図。
【図６】本発明のプッシュスイッチの動作を説明するための説明図。
【図７】本発明のプッシュスイッチの他の実施形態を示す要部断面平面図。
【図８】従来のプッシュスイッチの要部断面平面図。
【図９】従来のプッシュスイッチの要部縦断面図。
【図１０】従来のプッシュスイッチの動作を説明するための説明図。
【符号の説明】
１枠体
１ａ空洞部
１ｂ凹部
２固定接片
２ａ接触部
２ｂ端子部
３駆動体
３ａ支持部
３ｂ係止部
３ｃピン部
４可動体
４ａ操作部
４ｂ収納部
４ｃ凹部
５ハート型カム溝
５ａ第１のＶ字状溝部
５ｂ第２のＶ字状溝部
５ｃ、５ｄ溝部
５ｅ外壁
５ｆ内壁
５ｇ島状部
５ｈ係止部
６可動接片
７取付板
７ａ孔
８バネ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a push-push type push switch using a heart-shaped cam groove.
[0002]
[Prior art]
As shown in FIGS. 8 to 10, in the conventional push switch using a heart-shaped cam groove, a metal box-shaped frame 21 is formed in a round hole 21b provided in the upper wall 21a and a front wall 21c. And a provided square groove 21d.
The spring plate 22 made of a metal plate has a spring portion 22b cut and raised from a flat base portion 22a. The spring plate 22 is housed in the frame body 21, and the base portion 21a is attached to the upper wall 21a. It is attached to the frame 21 in a state of being overlapped.
Further, the drive pin 23 formed by bending a cylindrical metal rod to form a Z shape includes a horizontal portion 23a located at the center, a bent portion 23b bent upward from one end of the horizontal portion 23a, and a horizontal portion. And a bent portion 23c bent downward from the other end of 23a.
The drive pin 23 is positioned in the frame body 21 and the bent portion 23b is inserted into the round hole 21b of the upper wall 21a in a state where the horizontal portion 23a is in contact with the spring portion 22b of the spring plate 22. The other bent portion 23c is attached to the frame body 21 with the bent portion 23b as a fulcrum.
[0003]
The movable body 24 made of a synthetic resin molded product includes an operation portion 24a, a storage portion 24b for storing a movable contact piece (not shown), and a heart-shaped cam groove 25 formed on the upper surface of the storage portion 24b. have.
The heart-shaped cam groove 25 includes a first V-shaped groove 25a, a second V-shaped groove 25b, a first and second V-shaped groove 25a, as shown in FIG. Groove portions 25c and 25d connecting 25b, an outer wall 25e forming the outer shape of the heart-shaped cam groove 25, an inner wall 25f forming the inner shape of the heart-shaped cam groove 25, and four grooves provided on the bottom wall 25g of the groove It is comprised with the step part 25h.
The movable body 24 positions the operation portion 24 a in the rectangular groove 21 d of the frame body 21 and stores the storage portion 24 b in the frame body 21.
At this time, the bent portion 23 c of the drive pin 23 is positioned in the heart-shaped cam groove 25.
[0004]
A plurality of fixed contact pieces 27 are fixed to the insulating substrate 26, and the insulating substrate 26 is disposed so as to cover the lower opening of the frame body 21. The insulating substrate 26 is fixed to the frame body 21 by appropriate means. Has been.
At this time, the fixed contact piece 27 can be brought into and out of contact with a movable contact piece (not shown) accommodated in the movable body 24, and the bent portion of the drive pin 23 pressed by the spring portion 22b of the spring plate 22 is provided. The tip of 23c is in contact with the bottom wall 25g of the heart-shaped cam groove 25.
In addition, a coiled spring 28 is attached between the front wall 21c and the operation portion 24a, and the movable body 24 is constantly pressed forward by the spring 28.
[0005]
Such a push switch presses the operating portion 24a of the movable body 24 against the elasticity of the spring 28, and when the movable body 24 is in the first position, the movable contact piece is fixedly contacted. When the contact point is switched to and away from the piece 27, and the operating portion 24a is moved back to the pre-pressing state by the spring 28, the movable contact piece is connected to the fixed contact piece 27. The contact is switched after contact and separation.
Next, the operation of the heart-shaped cam groove 25 and the drive pin 23 accompanying the operation of the movable body 24 will be described with reference to FIG. 10. In the second position where the movable body 24 is pushed back by the spring 28, the drive is performed. The pin 23 is located at the position P1 of the second V-shaped groove 25b, and the bent portion 23c engages with the outer wall 25e to stop the movement of the movable body 24 by the spring 28, and the bent portion 23c The distal end is in contact with the bottom wall 25 g by the pressing of the spring plate 22.
[0006]
In this state, when the movable body 24 is pressed against the spring 28, that is, moved in the direction of the arrow X, the driving pin 23 comes into contact with the inner wall 25f while the tip of the bent portion 23c rubs the bottom wall 25g, and the driving is performed. The pin 23 becomes the position P2 while rotating along the inner wall 25f with the bent portion 23b as a fulcrum.
Further, if the movement in the direction of the arrow X is continued, the drive pin 23 falls to the step portion 25h and becomes the position P3, and the movement of the movable body 24 in the direction of the arrow X is stopped. The movable body 24 is pushed back in the arrow Y direction by the spring 28. At this time, the drive pin 23 is positioned in the first V-shaped groove portion 25a along the step portion 25h while rotating, and becomes a position P4 in contact with the inner wall 25f, whereby the movable body 24 is moved. The movable body 24 stops and becomes the first position in the pushed state.
[0007]
Further, in this state, when the movable body 24 is pressed again against the spring 28, the movable body 24 moves in the direction of the arrow X. Then, the drive pin 23 falls to the step portion 25h and reaches the position P5. The movement of the movable body 24 in the arrow X direction is stopped.
When the pressing of the movable body 24 is released, the movable body 24 is pushed back in the arrow Y direction by the spring 28.
At this time, the drive pin 23 moves along the step portion 25h and the inner wall 25f while rotating to reach the position of P6 that falls on the step portion 25h, and further when the movable body 24 moves in the arrow Y direction, the drive pin 23 is driven. The pin 23 comes into contact with the outer wall 25e, rotates along the outer wall 25e, and falls into the stepped portion 25h to be the position of P1 at the start.
Thus, the push switch is switched by the push / push operation of the movable body 24.
[0008]
[Problems to be solved by the invention]
In the conventional push switch using the heart-shaped cam groove, the bent portion 23c of the Z-shaped drive pin 23 is engaged with the heart-shaped cam groove 25 of the movable body 24 to receive the pressing force from the spring 28. Therefore, it is necessary to use a thick drive pin 23 in order to increase the strength. For this reason, the drive pin 23 is enlarged and the heart-shaped cam groove 25 for receiving the drive pin 23 is also enlarged. There is a problem of becoming large.
Further, in order to ensure the operation of the drive pin 23, the spring plate 22 that presses the drive pin 23 against the bottom wall 25g of the heart-shaped cam groove 25 is required, which increases the number of parts and increases the cost. Besides, there is a problem that productivity is bad.
Further, since the drive pin 23 rubs on the bottom wall 25g of the heart-shaped cam groove 25, there is a problem that the moving feeling of the movable body 24 is deteriorated and the life is short due to the rub.
Further, the drive pin 23 has a Z shape, and the bent portion 23b has to be inserted into the small round hole 21b of the frame body 21 in order to perform the rotational movement. The drive pin 23 must be made of metal from the viewpoint of strength, and further, there is a problem that Z-shaped processing is necessary and workability is poor.
[0009]
[Means for Solving the Problems]
As a first solving means for solving the above-mentioned problem, a heart-shaped cam groove which is elastically pressed by a spring and provided with a V-shaped groove portion, a movable body having a locking portion, and the heart-shaped cam groove are located. A drive unit having a pin part and a locking part, wherein the movable body has a first position in which the movable body is pushed against the spring, and a second position in which the movable body is pushed back by the spring. When the movable body is in the first position, the pin portion of the drive body is located in the V-shaped groove portion of the heart-shaped cam groove, and the locking portion of the movable body And the engaging portion of the driving body are in contact with each other.
As a second solution, the driving body is formed of a plate-shaped synthetic resin, and the driving body is movable in a direction perpendicular to the moving direction of the movable body.
As a third solution, the movable body is provided with the locking portion adjacent to the V-shaped groove portion, and the driving body is provided with the locking portion adjacent to the pin portion. The configuration was as follows.
As a fourth solution, when the movable body is at the first position, the side portion of the pin portion is brought into contact with the inner wall of the heart-shaped cam groove.
Further, as a fifth solving means, the movable body is provided with a plurality of locking portions, and the driving body is provided with a plurality of locking portions, so that a plurality of locking portions are connected. It was set as the structure made to contact | abut.
[0010]
Further, as a sixth solving means, a heart-shaped cam groove provided with a V-shaped groove and a driving body having a locking portion, a pin portion which is elastically pressed by a spring and located in the heart-shaped cam groove, A movable body having a stop, and the movable body is movable between a first position pushed against the spring and a second position pushed back by the spring; When the movable body is in the first position, the pin portion of the movable body is located in the V-shaped groove portion of the heart-shaped cam groove of the driving body, and the locking portion of the movable body The driving body is configured to come into contact with the locking portion.
As a seventh solution, the driving body is made of a plate-shaped synthetic resin, and the driving body can be moved in a direction perpendicular to the moving direction of the movable body.
As an eighth solving means, the driving body is provided with the locking portion adjacent to the V-shaped groove portion, and the movable body is provided with the locking portion adjacent to the pin portion. The configuration was as follows.
As a ninth solution, when the movable body is in the first position, the side portion of the pin portion is brought into contact with the inner wall of the heart-shaped cam groove.
Further, as a tenth solving means, the movable body is provided with a plurality of locking portions, and the drive body is provided with a plurality of locking portions, so that a plurality of locking portions are connected. It was set as the structure made to contact | abut.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
The push switch using the heart-shaped cam groove of the present invention will be described with reference to FIGS. 1 to 7. FIG. 1 is a cross-sectional plan view of the main part of the push switch of the present invention, and FIG. 2 is the main part of the push switch of the present invention. FIG. 3 is an exploded perspective view of the push switch of the present invention, FIG. 4 is a perspective view of the drive body according to the push switch of the present invention turned upside down, and FIG. 5 shows the heart-shaped cam groove according to the push switch of the present invention. FIGS. 6A and 6B are explanatory views for explaining the operation of the push switch of the present invention, and FIG. 7 is a cross-sectional plan view of an essential part showing another embodiment of the push switch of the present invention. It is.
[0012]
As shown in FIGS. 1 to 6, the push switch using the heart-shaped cam groove of the present invention has a box-shaped frame body 1 made of a synthetic resin molded product, which has a hollow portion 1a and a hollow portion 1a. And a concave portion 1b provided in the upper part of the front.
Further, a fixed contact piece 2 made of a metal plate is embedded and attached to the frame body 1, the contact portion 2 a is located in the cavity portion 1 a, and the terminal portion 2 b protrudes outside the frame body 1. It has become.
The driving body 3 made of a synthetic resin molded product is adjacent to the rectangular support portion 3a, the convex locking portion 3b provided at the center of the support portion 3a, and the locking portion 3b. And provided pin portion 3c.
And this drive body 3 is accommodated in the recessed part 1b provided in a row by the cavity part 1a of the frame 1, the latching | locking part 3b and the pin part 3c are located in the cavity part 1a side, and move to a horizontal direction It is attached to the frame 1 as possible.
[0013]
In addition, the movable body 4 made of a synthetic resin molded product has an operation portion 4a, a storage portion 4b for storing the movable contact piece 6, a recess 4c provided on the upper surface of the storage portion 4b, and an upper surface of the storage portion 4b. It has a heart-shaped cam groove 5 formed.
The heart-shaped cam groove 5 has a first V-shaped groove portion 5a, a second V-shaped groove portion 5b, and first and second V-shaped portions as shown in FIGS. Straight groove portions 5c, 5d connecting the groove portions 5a, 5b, an outer wall 5e forming the outer shape of the heart-shaped cam groove 5, and an island-shaped portion 5g having an inner wall 25f forming the inner shape of the heart-shaped cam groove 5. And an engaging portion 5h provided on the island-like portion 5g adjacent to the first V-shaped groove portion 5a.
The movable body 4 is movable so that the storage portion 4b in which the movable contact piece 6 is accommodated is inserted into the hollow portion 1a of the frame 1 so that the movable contact piece 6 can come into contact with and separate from the fixed contact piece 2. The body 4 is movably attached, and the pin portion 3c of the drive body 3 is positioned in the heart-shaped cam groove 5.
Further, the driving body 3 has a support portion 3 a sandwiched between the frame body 1 and the movable body 4, and is movable in a direction perpendicular to the moving direction of the movable body 4.
[0014]
The U-shaped mounting plate 7 made of a metal plate has a hole 7a, and the mounting plate 7 is attached to the front surface of the frame body 1 by an appropriate means in a state where the operation portion 4a of the movable body 4 is inserted into the hole 7a. The mounting plate 7 is attached to prevent the movable body 4 and the driving body 3 from coming off.
In addition, a coiled spring 8 is placed in the recess 4c of the movable body 4 and is mounted so as to be positioned between the movable body 4 and the rear wall of the frame body 1. It is in a state of being suppressed forward.
[0015]
And such a push switch presses the operation part 4a of the movable body 4 against the elasticity of the spring 8, and when the movable body 4 is pushed into the first position, the movable contact piece 6 is fixed. When the contact point 2 is switched to and away from the contact piece 2 and the operating portion 4a is moved back to the pre-pressing state by the spring 8, the movable contact piece 6 is fixed. The contact is switched by contacting and leaving 2.
Next, the operation of the heart-shaped cam groove 5 and the drive body 3 accompanying the operation of the movable body 4 will be described with reference to FIG. 6. In the second position where the movable body 4 is pushed back by the spring 8, the drive is performed. The pin portion 3c of the body 3 is located at the position P1 of the second V-shaped groove portion 5b, the storage portion 4b of the movable body 4 hits the mounting plate 7, and the movement of the movable body 4 in the forward direction by the spring 8 is performed. It is in a stopped state.
[0016]
In this state, when the movable body 4 is pressed against the spring 8, that is, moved in the direction of the arrow X, the pin portion 3 c is in the position of P 2 in contact with the inclined inner wall 5 f. If the movement is continued, the pin portion 3c moves along the inner wall 5f, so that the driving body 3 moves in the concave portion 1b in a direction perpendicular to the moving direction of the movable body 4 and becomes the position P3.
Further, if the movement in the direction of the arrow X is continued, the pin portion 3c is guided by the linear groove portion 5c to the position P4, and at this time, the pin portion 3c is in contact with the inclined outer wall 5e. When the movement of the movable body 4 is continued, the pin portion 3c moves along the outer wall 5e to the position P5, and the movement of the movable body 4 in the arrow X direction stops. When the pressing of the movable body 4 is released, the movable body 4 is pushed back in the direction of the arrow Y by the spring 8. At this time, the pin portion 3c is located in the first V-shaped groove portion 5a and the inclined inner wall 5f. Next, it moves to the position of P7, that is, the innermost position of the first V-shaped groove 5a along the inclination of the inner wall 5f.
At this time, as shown in FIG. 6B, the locking portion 3b of the driving body 3 comes into contact with the locking portion 5h of the movable body 4, the movement of the movable body 4 stops, and the movable body 4 is pushed in. This is the first position in the state that has been set.
At this time, the pin portion 3c is in contact with the inner wall 5f. However, the pin portion 3c may not be in contact with the inner wall 5f, but only contact between the locking portions 3b and 5h.
Thus, the stopper strength of the driving body 3 with respect to the spring 8 is increased by the contact between the locking portion 3b of the driving body 3 and the locking portion 5h of the movable body 4.
[0017]
In this state, when the movable body 4 is pressed against the spring 8 again, the movable body 4 moves in the direction of the arrow X. Then, the pin portion 3c is in a state of P8 that is in contact with the inclined outer wall 5e. When the movable body 4 further moves, the pin portion 3c moves to the position P9 along the inclination of the outer wall 5e, and at this time, the movement of the movable body 4 in the arrow X direction stops.
Then, when the pressing of the movable body 4 is released, the movable body 4 is pushed back in the direction of the arrow Y by the spring 8, and then the pin portion 3c is in a position of P10 that contacts the inclined inner wall 5f, and the movable body 4 is further moved. If it moves, the pin part 3c will move to the position of P11 along the inclination of the inner wall 5f.
Further, when the movable body 4 moves, the movable body 4 is guided by the linear groove 5d to be in the position of P12 and is in contact with the inclined outer wall 5e.
Further, when the movable body 4 moves in the direction of the arrow Y, the pin portion 3c moves along the inclined outer wall 25e into the second V-shaped groove portion 5b and becomes the position of P1 at the start, The movement of the movable body 4 stops.
In this way, the push switch is switched by the push / push operation of the movable body 4.
The relationship between the locking portion 3b of the driving body 3 and the locking portion 5h of the movable body 4 is such that the locking portion 3b can move around the locking portion 5h, except for FIG. 6B. The stop portion 3b is not engaged with the locking portion 5h.
[0018]
FIG. 7 shows another embodiment of the present invention, wherein the driving body 3 is provided with a plurality of locking portions 3b, and the movable body 4 is provided with a plurality of locking portions 4h. A plurality of locking portions 3b and 5h are brought into contact with each other when in the pushed-in first position, and other configurations have the same configurations as in the above-described embodiment. The same number is attached and the explanation is omitted.
[0019]
In the above embodiment, the driving body 3 is provided with the locking portion 3b and the pin portion 3c, and the movable body 4 is provided with the heart-shaped cam groove 5 and the locking portion 5h. The body 3 may be provided with a heart-shaped cam groove and a locking portion, and the movable body 4 may be provided with a locking portion and a pin portion. In this case as well, the same effects as described above can be obtained.
[0020]
【The invention's effect】
In the push switch of the present invention, when the movable body 4 is in the first position pushed against the spring 8, the locking portion 3b of the driving body 3 and the locking portion 5h of the movable body 4 come into contact with each other. Therefore, the force due to the spring 8 to the pin portion 3c is reduced, the pin portion 3c can be made thin, and the heart-shaped cam groove 5 can be made small, so that a small push switch can be provided.
Further, the conventional spring plate 22 is not required, and a low-cost and high-productivity product can be provided.
Further, the pin portion 3c does not rub against the bottom wall of the heart-shaped cam groove 5, and therefore, it is possible to provide the movable body 4 with a good movement feeling.
In addition, since the driving body 3 is made of synthetic resin, the productivity is better than that of the conventional metal Z-type driving pin 23, and an inexpensive one can be provided.
In addition, since the driving body 3 can move in a direction perpendicular to the moving direction of the movable body 4, it is not necessary to insert the bent portion 23b into the small round hole 21b as in the prior art, thereby providing a product with high productivity. it can.
In addition, the movable body 4 is provided with a locking portion 5h adjacent to the first V-shaped groove 5a, and the driving body 3 is provided with a locking portion 3c adjacent to the pin portion 3c. Small size and high stopper strength can be provided.
Further, when the driving body 3 is in the first V-shaped groove portion 5a, the side portion of the pin portion 3c is brought into contact with the inner wall 5f, so that the movement of the pin portion 3c can be ensured and accurate push / push operation is performed. Operation is obtained.
Further, since the plurality of locking portions 5h and 3c are provided on the movable body 4 and the driving body 3 so that the plurality of locking portions come into contact with each other, the stopper strength can be increased.
[0021]
Further, the drive body 3 is provided with a heart-shaped cam groove and a locking portion, and the movable body 4 is provided with a pin portion and a locking portion, and the movable body 4 is pushed against the spring 8. Since the engaging part of the driving body 3 and the engaging part of the movable body 4 are in contact with each other when in position, the force by the spring 8 to the pin part is reduced, the pin part can be made thin, and the heart-shaped cam The groove can be made small, and therefore a small push switch can be provided.
Further, the conventional spring plate 22 is not required, and a low-cost and high-productivity product can be provided.
Further, the pin portion does not rub against the bottom wall of the heart-shaped cam groove, and therefore, it is possible to provide the moving body 4 with a good movement feel.
In addition, since the driving body 3 is made of synthetic resin, the productivity is better than that of the conventional metal Z-type driving pin 23, and an inexpensive one can be provided.
In addition, since the driving body 3 can move in a direction perpendicular to the moving direction of the movable body 4, it is not necessary to insert the bent portion 23b into the small round hole 21b as in the prior art, thereby providing a product with high productivity. it can.
Further, since the driving body 3 is provided with a locking portion adjacent to the first V-shaped groove portion, and the movable body 4 is provided with a locking portion adjacent to the pin portion, a small stopper is provided. A product with high strength can be provided.
In addition, when the movable body 4 is in the first V-shaped groove portion, the side portion of the pin portion is brought into contact with the inner wall of the heart-shaped cam groove, so that the movement of the pin portion can be ensured and accurate push- Push operation is obtained.
In addition, since the plurality of engaging portions are provided on the movable body 4 and the driving body 3 so that the plurality of engaging portions are brought into contact with each other, the stopper strength can be further increased.
[Brief description of the drawings]
FIG. 1 is a cross-sectional plan view of an essential part of a push switch of the present invention.
FIG. 2 is a longitudinal sectional view of an essential part of the push switch of the present invention.
FIG. 3 is an exploded perspective view of the push switch of the present invention.
FIG. 4 is a perspective view in which a drive body according to the push switch of the present invention is turned over.
FIG. 5 is a perspective view showing a heart-shaped cam groove according to the push switch of the present invention.
FIG. 6 is an explanatory diagram for explaining the operation of the push switch of the present invention.
FIG. 7 is a cross-sectional plan view of an essential part showing another embodiment of the push switch of the present invention.
FIG. 8 is a cross-sectional plan view of a main part of a conventional push switch.
FIG. 9 is a longitudinal sectional view of a main part of a conventional push switch.
FIG. 10 is an explanatory diagram for explaining the operation of a conventional push switch.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Frame 1a Cavity part 1b Recessed part 2 Fixed contact piece 2a Contact part 2b Terminal part 3 Driver 3a Support part 3b Locking part 3c Pin part 4 Movable body 4a Operation part 4b Storage part 4c Recessed part 5 Heart-shaped cam groove 5a 1st V-shaped groove portion 5b Second V-shaped groove portion 5c, 5d Groove portion 5e Outer wall 5f Inner wall 5g Insular portion 5h Locking portion 6 Movable contact piece 7 Mounting plate 7a Hole 8 Spring

Claims

A heart-shaped cam groove provided with a V-shaped groove portion, which is pressed by a spring, and a movable body having a locking portion, a pin portion located in the heart-shaped cam groove, and a driving body having a locking portion The movable body is movable between a first position in which the movable body is pushed against the spring and a second position in which the movable body is pushed back by the spring, and the movable body is in the first position. The pin portion of the driving body is positioned in the V-shaped groove portion of the heart-shaped cam groove, and the locking portion of the movable body and the locking portion of the driving body are in contact with each other. A push switch characterized by that.

2. The push switch according to claim 1, wherein the driving body is made of a plate-shaped synthetic resin, and the driving body can be moved in a direction perpendicular to the moving direction of the movable body.

2. The movable body is provided with the locking portion adjacent to the V-shaped groove, and the driving body is provided with the locking portion adjacent to the pin portion. Or the push switch according to 2.

4. The push according to claim 1, wherein when the movable body is in the first position, a side portion of the pin portion is brought into contact with an inner wall of the heart-shaped cam groove. switch.

The movable body is provided with a plurality of locking portions, and the driving body is provided with a plurality of locking portions so that the plurality of locking portions are brought into contact with each other. The push switch according to claim 1, 2, or 4.

A heart-shaped cam groove provided with a V-shaped groove and a driving body having a locking portion; a pin portion which is elastically pressed by a spring and located in the heart-shaped cam groove; and a movable body having a locking portion The movable body is movable between a first position in which the movable body is pushed against the spring and a second position in which the movable body is pushed back by the spring, and the movable body is in the first position. The pin portion of the movable body is positioned in the V-shaped groove portion of the heart-shaped cam groove of the driving body, and the locking portion of the movable body and the locking portion of the driving body, A push switch characterized in that the contact is made.

7. The push switch according to claim 6, wherein the driving body is formed of a plate-shaped synthetic resin, and the driving body can be moved in a direction perpendicular to the moving direction of the movable body.

7. The driving body is provided with the locking portion adjacent to the V-shaped groove, and the movable body is provided with the locking portion adjacent to the pin portion. Or a push switch according to 7.

The push according to claim 6, 7 or 8, wherein when the movable body is in the first position, a side portion of the pin portion is brought into contact with an inner wall of the heart-shaped cam groove. switch.

The movable body is provided with a plurality of locking portions, and the driving body is provided with a plurality of locking portions so that the plurality of locking portions are brought into contact with each other. The push switch according to claim 6, 7, or 9.