JP4203643B2

JP4203643B2 - Push switch

Info

Publication number: JP4203643B2
Application number: JP2003010359A
Authority: JP
Inventors: 佳之山脇; 良治伊藤
Original assignee: Panasonic Corp; Matsushita Electric Works Ltd
Current assignee: Panasonic Corp; Panasonic Electric Works Co Ltd
Priority date: 2003-01-17
Filing date: 2003-01-17
Publication date: 2009-01-07
Anticipated expiration: 2023-01-17
Also published as: JP2004227781A

Description

【０００１】
【発明の属する技術分野】
本発明は、押し釦を押し操作して開閉部を開閉させるプッシュスイッチに関するものである。
【０００２】
【従来の技術】
従来この種のプッシュスイッチとして、例えば図３に示す構造のものがある（特許文献１にも同様の構造のスイッチが開示されている。）。
【０００３】
このプッシュスイッチは、一面が開口した略箱形のボディ１００と、ボディ１００の開口側に結合されるカバー１０１と、ボディ１００の一側面から内外に貫通して押動自在に装着されボディ１００内に配置された部位に孔１０２ａを有する押し釦１０２と、ボディ１００内に固定接点１０３ａを有する一端部が配設され他端部がボディ１００の底面を貫通し外部に突出した接点端子１０３と、略Ｕ字形に形成され一端に可動接点１０４ａを固着すると共に他端を短くカットして外側に折曲し舌片１０４ｂを設けた可動接触子１０４と、可動接触子１０４を揺動支点１０５ａを中心に揺動自在に支持すると共に一端部がボディ１００の底面を貫通し外部に突出した共通端子１０５と、一端部が可動接触子１０４の舌片１０４ｂに係止され他端部が押し釦１０２の孔１０２ａを通ってカバー１０１の裏面に設けた突起部１０１ａに係止されたコイル状の反転スプリング１０６と、押し釦１０２をボディ１００の外方へ突出させる方向に付勢する復帰スプリング１０７とを備えて構成される。
【０００４】
上記のように構成されたプッシュスイッチは、押し釦１０２の孔１０２ａの一側面１０２ｂで反転スプリング１０６を押すことで可動接触子１０４が図３において反時計方向に揺動し可動接点１０４ａが固定接点１０３ａに接触してオン状態となり、また、角孔１０２ａの側面１０２ｂと対向する側面１０２ｃで反転スプリング１０６を押すことで可動接触子１０４が図３において時計方向に揺動し可動接点１０４ａが固定接点１０３ａから開離してオフ状態となる。
【０００５】
【特許文献１】
特開平６−１３９８７０号公報
【０００６】
【発明が解決しようとする課題】
しかしながら、プッシュスイッチに限らず、スイッチ全般としてスイッチの接点圧力を決めるのは反転スプリングのスプリング力であり、従来例の場合は、可動接触子１０４の回転支点１０５ａと反転スプリング１０６の係止部の水平距離が小さく、また、反転スプリング１０６の力の方向を接点圧力が大きくなるような方向にすることは、限られた大きさの中では困難であった。
【０００７】
また、反転スプリング１０６がカバー１０１の固定された突起部１０１ａに係止されているため、可動接触子１０４が反転するための反転スプリングの撓みが規制され、このことも接点圧力を大きくすることが困難な原因となっていた。
【０００８】
以上のように接点圧力が大きくできないため、スイッチの定格電流を大きくすることが困難となっており、例えば定格電流が「１６Ａ」以上のプッシュスイッチが現在存在しない理由の１つとなっている。
【０００９】
本発明は上記問題点に鑑みて為されたものであって、その目的とするところは、接点圧力を大きくし高容量の開閉を可能とするプッシュスイッチを提供することにある。
【００１０】
【課題を解決するための手段】
上記目的を達成するために、請求項１記載のプッシュスイッチは、器体の一側面から内外に貫通して押動自在に装着された押し釦と、該押し釦の移動方向に並行する器体の天井面に回転自在に軸支された回転子と、器体の底面に固定接点を設けた導電材料からなる接点端子と、略コ字形に形成されたコ字部を有し前記コ字部の一方の脚片側に前記固定接点に対応する可動接点を設けた導電材料からなる可動接触子と、前記可動接触子を揺動自在に支持する支持部を器体の底面に設けた導電材料からなる共通端子と、一端部が前記回転子に装着され他端部が前記可動接触子の前記コ字部に挿入され、前記押し釦の押操作に連動して撓みを反転させて前記可動接触子を揺動させ、前記可動接点と前記固定接点とを接触／開離させるコイル状の反転スプリングと、一端が前記器体に回動自在に軸支されたロックピンとを備え、前記押し釦は、一端が前記移動方向に押し操作される操作体と、前記操作体の他端から前記移動方向に延設された延設部と、前記延設部のうち前記器体の天井面に対向する面に形成され前記ロックピンの他端を外周部に沿って摺動させることによって前記押し釦をオンの位置とオフの位置で係止するハート形カム部と、それぞれ前記反転スプリングが挿入される貫通孔を有し前記ハート形カム部を挟んで前記延設部の両側に設けられた１対の腕体とを有するものとした。
【００１１】
【発明の実施の形態】
以下、本発明の一実施形態を図１および図２を用いて説明する。
【００１２】
図１（ａ），（ｂ）は本実施形態のプッシュスイッチの縦断面図を、図２は本実施形態のプッシュスイッチの分解斜視図を示す。
【００１３】
このプッシュスイッチは、合成樹脂により一面が開口した略箱形に成形されたボディ１と、ボディ１の開口側に結合されるカバー２とから器体が作製される。
【００１４】
ボディ１とカバー２とは、ボディ１の一側面に設けた組立爪１ａと、カバー２の一側面に突設された舌片２ａに穿孔された組立孔２ｂとが凹凸嵌合することにより結合される。
【００１５】
ボディ１の内部は、隔壁１ｂにより長方形状の２つの収納室１Ａ，１Ｂに分離されている。
【００１６】
収納室１Ａ，１Ｂの底面の長手方向の一方には接点端子３，３が配設される。
【００１７】
接点端子３，３は導電材料からなり、略Ｌ字形に形成されており、短い方の脚片の外側面には固定接点３ａ，３ａが設けられ、固定接点３ａ，３ａをボディ１の底面に配設する共に長い方の脚片の先端３ｂをボディ１の底面から外部に貫通させた状態に取り付けられる。
【００１８】
収納室１Ａ，１Ｂの底面の長手方向の他方には共通端子４，４が配設される。
【００１９】
共通端子４，４は、導電材料からなり、略Ｌ字形に形成されており、短い方の脚片の先端が二股部４ａ，４ａに分かれて外側に折曲され、後述する可動接触子５を揺動自在に支持する支持部を形成している。
【００２０】
共通端子４，４は、二股部４ａ，４ａからなる支持部をボディ１の底面に配設すると共に長い方の脚片の先端４ｂをボディ１の底面から外部に貫通させた状態に取り付けられる。
【００２１】
可動接触子５，５は、中央片５ａと、中央片５ａの両端縁から中央片５ａと略直角となる方向にそれぞれ突出する両脚片５ｂ，５ｃとからなる略コ字形に形成されたコ字部を有している。
【００２２】
一方の脚片５ｂの先端からは延設片５ｄが延設され、延設片５ｄは一度、中央片５ａの方向へと略円弧状に折曲された後、中央片５ａの斜め上方へと折曲され、延設片５ａの先端の中央片５ａ側の面に可動接点５ｅを設けている。
【００２３】
また、中央片５ａの両脚片５ｂ，５ｃと並行する方向の両端部には切り欠き５ｆ，５ｆが設けられている。
【００２４】
可動接触子５，５は、切り欠き５ｆ，５ｆから共通端子４，４の二股部４ａ，４ａをコ字部の内側に突出させた状態に配置され、共通端子４，４の二股部４ａ，４ａからなる支持部に揺動自在に支持される。
【００２５】
ボディ１の接点端子３が配設された側の側面と対向する側の側面には、ボディ１の開口側の端縁から切り欠き１ｃが設けられ、切り欠き１ｃを介して押し釦６が押動自在に装着される。
【００２６】
押し釦６は、底面および長手方向の一側面が開口した略直方体形状の操作体６ａを有し、操作体６ａの上面から前記開口した一側面の方向へ延設部６ｂが延設され、延設部６ｂの両側に角孔６ｄ，６ｄを有する腕体６ｃ，６ｃが突出した略Ｔ字形の形状に成形される。
【００２７】
夫々の角孔６ｄ，６ｄの延設部６ｂに沿った両内側面の対向する位置には、凸部６ｆ，６ｆが突設される。
【００２８】
押し釦６は、操作体６ａの内部に復帰スプリング７を収納し、復帰スプリング７の一端を前記開口した一側面を通してボディ１の切り欠き１ｃの下方に設けられた凸部１ｄに係止させた状態で、各腕体６ｃ，６ｃをボディ１の内部に収納して配置される。
【００２９】
また、押し釦６の延設部６ｂのカバー２側の面にはハート形カム部６ｅが形成されている。
【００３０】
ロックピン８は、線状の金属により中央片８ａと両脚片８ｂ，８ｃとからなる略コ字形に形成され、一方の脚片８ｂをボディ１の接点端子３が配設された側の側面の開口側の端縁付近に設けた孔１ｅに回動自在に軸支させ、他方の脚片８ｃをハート形カム部６ｅの外周部に沿って摺動させる。
【００３１】
押さえばね９は、一端部に設けた孔９ａがカバー２の裏面に設けた凸部２ｃに取着され、他端部でロックピン８を常にハート形カム部６ｅの方向に付勢する。
【００３２】
回転子１０は、押し釦６の移動方向に並行するカバー２の裏面に設けられた軸受け２ｄにより回転自在に軸支される。また、カバー２がボディ１に結合された際にボディ１側となる面に凸部１０ａが設けられている。
【００３３】
コイル状の反転スプリング１１は、その径が押し釦６の角孔６ｄ，６ｄに設けられた２つの凸部６ｆ，６ｆ間の間隔よりも大きく形成され、一端部が回転子１０の凸部１０ａに装着され、他端部が押し釦６の角孔６ｄ，６ｄの凸部６ｆ，６ｆと、角孔６ｄ，６ｄの操作体６ａ側の内側面６ｇ，６ｇとの間を通った後に可動接触子５の前記コ字部に挿入される。
【００３４】
上記のように構成されたプッシュスイッチは、詳しくは省略するが、取り付け穴１２ａ，１２ａを有する取付金具１２によりプリント板等に取着される。
【００３５】
次に、このプッシュスイッチの動作について説明する。
【００３６】
押し釦６を押圧しない初期状態（オフ状態）では、図１（ａ）に示すように、押し釦６が復帰スプリング７によりボディ１の外側方向へと付勢された状態でボディ１から外部に突出している。
【００３７】
また、反転スプリング１１，１１は、図１（ａ）において、略逆く字形に撓んでおり、反転スプリング１１，１１の他端部が挿入された可動接触子５，５は、反転スプリング１１，１１にコ字部の他方の脚片５ｃが内側から押されて付勢され、可動接触子５，５の中央片５ａ，５ａがボディ１の底面と並行となり、中央片５ａの斜め上方に位置する可動接点５ｅ，５ｅは、固定接点３ａ，３ａから開離した状態となる。この時の接点間隔ｘは、３ｍｍ以上となっている。
【００３８】
次に、押し釦６の操作部６ａの先端が押し操作されると、反転スプリング１１，１１が押し釦６の角孔６ｄ，６ｄの操作体６ａ側の内側面６ｇ，６ｇに押圧され、それと連動して反転スプリング１１，１１の他端部が挿入された可動接触子５，５が共通端子４，４の二股部４ａ，４ａを支点として図１（ａ）において反時計方向へと回転していく。また、反転スプリング１１，１１の一端部が装着された回転子１０，１０は、図１（ａ）において時計方向へと回転していく。
【００３９】
ある時点で、反転スプリング１１，１１は死点を越えると撓みが反転し、可動接触子５，５をスナップアクション的に回転させ、図１（ｂ）に示すように可動接点５ｅ，５ｅと固定接点３ａ，３ａとが接触し、プッシュスイッチがオン状態となる。この時、反転スプリング１１，１１は、略く字形に撓んでいる。
【００４０】
このオン状態において、図１（ｂ）に示すように可動接触子５，５のコ字部の一方の脚片５ｂには反転スプリング１１，１１が当接しており、コ字部を内側から押圧し、可動接点５ｅと固定接点３ａとの接点圧力が大きくなる方向に可動接触子５，５を付勢している。
【００４１】
この状態はロックピン８がハート形カム６ｅに係止することにより保持される。
【００４２】
ロックピン８のロック状態が解除されると、押し釦６は復帰スプリング７の付勢力によりボディ１の外側方向へと移動する。この時、反転スプリング１１，１１は押し釦６の角孔６ｄ，６ｄの凸部６ｆ，６ｆにより押し釦６の移動方向へと押圧され、それと連動して可動接触子５，５が共通端子４，４の二股部４ａ，４ａを支点として図１（ｂ）において時計方向へと回転していく。また、回転子１０，１０は、図１（ｂ）において反時計方向へと回転していく。
【００４３】
ある時点で、反転スプリング１１，１１は死点を越えると撓みが反転し、可動接触子５，５をスナップアクション的に回転させ、図１（ａ）に示すように可動接点５ｅ，５ｅと固定接点３ａ，３ａとが開離し、プッシュスイッチがオフ状態となる。この時、反転スプリング１１，１１は、略逆く字形に撓んでいる。
【００４４】
かかるプッシュスイッチにおいては、反転スプリング１１，１１の一端部を回転子１０，１０に装着したことにより反転スプリング１１，１１の撓みの変化がスムーズになると共に、反転スプリング１１，１１の他端部を可動接触子５，５の前記コ字部に挿入したことによりスイッチがオン状態となったときに反転スプリング１１，１１の撓みが可動接触子５，５のコ字部を内側から押圧し、可動接点５ｅと固定接点３ａとの接点圧力が大きくなる方向に可動接触子５，５を付勢するので、接点圧力を大きくすることができ、高容量の開閉が可能となる。
【００４５】
【発明の効果】
請求項１記載のプッシュスイッチは、器体の一側面から内外に貫通して押動自在に装着された押し釦と、該押し釦の移動方向に並行する器体の天井面に回転自在に軸支された回転子と、器体の底面に固定接点を設けた導電材料からなる接点端子と、略コ字形に形成されたコ字部を有し前記コ字部の一方の脚片側に前記固定接点に対応する可動接点を設けた導電材料からなる可動接触子と、前記可動接触子を揺動自在に支持する支持部を器体の底面に設けた導電材料からなる共通端子と、一端部が前記回転子に装着され他端部が前記可動接触子の前記コ字部に挿入され、前記押し釦の押操作に連動して撓みを反転させて前記可動接触子を揺動させ、前記可動接点と前記固定接点とを接触／開離させるコイル状の反転スプリングと、一端が前記器体に回動自在に軸支されたロックピンとを備え、前記押し釦は、一端が前記移動方向に押し操作される操作体と、前記操作体の他端から前記移動方向に延設された延設部と、前記延設部のうち前記器体の天井面に対向する面に形成され前記ロックピンの他端を外周部に沿って摺動させることによって前記押し釦をオンの位置とオフの位置で係止するハート形カム部と、それぞれ前記反転スプリングが挿入される貫通孔を有し前記ハート形カム部を挟んで前記延設部の両側に設けられた１対の腕体とを有するので、前記反転スプリングの一端部を前記回転子に装着したことにより前記反転スプリングの撓みがスムーズになると共に、前記反転スプリングの他端部を前記可動接触子の前記コ字部に挿入したことにより、前記押し釦が押操作され前記反転スプリングの撓みが反転して前記可動接点と前記固定接点とが接触すると、前記反転スプリングの撓みが前記可動接触子のコ字部を内側から押圧し前記可動接点と前記固定接点との接点圧力を高めるので、高容量の開閉が可能になるという効果がある。
【図面の簡単な説明】
【図１】（ａ）本実施形態のプッシュスイッチのオフ時の縦断面図である。
（ｂ）同上のプッシュスイッチのオン時の縦断面図である。
【図２】（ａ）同上の分解斜視図である。
（ｂ）同上のカバーの裏面の分解斜視図である。
【図３】従来例のプッシュスイッチの縦断面図である。
【符号の説明】
１ボディ
２カバー
３接点端子
３ａ固定接点
４共通端子
５可動接触子
５ｅ可動接点
６押し釦
７復帰スプリング
８ロックピン
９押さえばね
１０回転子
１１反転スプリング[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a push switch that opens and closes an opening / closing part by pushing a push button.
[0002]
[Prior art]
Conventionally, there is a push switch of this type, for example, having a structure shown in FIG. 3 (Patent Document 1 also discloses a switch having a similar structure).
[0003]
The push switch includes a substantially box-shaped body 100 having an opening on one side, a cover 101 coupled to the opening side of the body 100, and a body 100 that is slidably mounted from one side surface to the inside and outside. A push button 102 having a hole 102a at a portion disposed in the body 100, a contact terminal 103 having one end portion having a fixed contact 103a disposed in the body 100 and the other end penetrating the bottom surface of the body 100 and projecting outside, The movable contact 104 is formed in a substantially U-shape, and the movable contact 104a is fixed to one end, the other end is cut short and bent outward, and the tongue 104b is provided. The movable contact 104 is centered on the swing fulcrum 105a. And a common terminal 105 having one end penetrating the bottom surface of the body 100 and projecting to the outside, and one end locked to the tongue 104b of the movable contact 104 and the other end. Through the hole 102a of the push button 102 and the coiled reversing spring 106 locked to the protrusion 101a provided on the back surface of the cover 101 and the push button 102 are urged in a direction to protrude outward of the body 100. And a return spring 107.
[0004]
In the push switch configured as described above, the movable contact 104 swings counterclockwise in FIG. 3 by pressing the reversing spring 106 with one side surface 102b of the hole 102a of the push button 102, and the movable contact 104a becomes the fixed contact. The movable contact 104 swings clockwise in FIG. 3 by pressing the reversing spring 106 on the side surface 102c facing the side surface 102b of the square hole 102a, and the movable contact 104a is fixed. It is separated from 103a and is turned off.
[0005]
[Patent Document 1]
Japanese Patent Laid-Open No. 6-139870 [0006]
[Problems to be solved by the invention]
However, it is the spring force of the reversing spring that determines the contact pressure of the switch as a whole, not limited to a push switch. In the case of the conventional example, the rotation fulcrum 105a of the movable contact 104 and the locking portion of the reversing spring 106 are determined. In a limited size, it is difficult to make the horizontal distance small and the direction of the force of the reversing spring 106 to be such that the contact pressure increases.
[0007]
In addition, since the reversing spring 106 is locked to the protruding portion 101a fixed to the cover 101, the bending of the reversing spring for reversing the movable contact 104 is restricted, which also increases the contact pressure. It was a difficult cause.
[0008]
Since the contact pressure cannot be increased as described above, it is difficult to increase the rated current of the switch. For example, this is one of the reasons why there is no push switch having a rated current of “16 A” or more.
[0009]
The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a push switch that increases contact pressure and enables high-capacity switching.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, a push switch according to claim 1 is characterized in that a push button penetrating inward and outward from one side of the body and being slidably mounted, and a body parallel to the moving direction of the push button The U-shaped portion has a rotor that is rotatably supported on the ceiling surface, a contact terminal made of a conductive material provided with a fixed contact on the bottom surface of the body, and a U-shaped portion formed in a substantially U-shape. A movable contact made of a conductive material provided with a movable contact corresponding to the fixed contact on one leg piece side, and a conductive material provided with a support portion for swingably supporting the movable contact on the bottom surface of the body. A common terminal, one end of which is attached to the rotor, and the other end is inserted into the U-shaped portion of the movable contact, and the movable contact is reversed by reversing the bending in conjunction with the pressing operation of the push button. Coiled reversal to move / contact the movable contact and the fixed contact Comprising a pulling, a locking pin, one end of which is rotatably supported to the unit body, the push button includes an operation member having one end pressed to the moving direction, the moving from the other end of the operating body The push button is formed by sliding the other end of the lock pin along the outer peripheral portion formed on an extension portion extending in a direction and a surface of the extension portion facing the ceiling surface of the container body 1 which is provided on both sides of the extending portion with the heart-shaped cam portion sandwiched between the heart-shaped cam portion which holds the reversing spring. It has a pair of arm bodies .
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 and 2.
[0012]
1A and 1B are longitudinal sectional views of the push switch of the present embodiment, and FIG. 2 is an exploded perspective view of the push switch of the present embodiment.
[0013]
This push switch has a body made of a body 1 formed into a substantially box shape with one surface opened by a synthetic resin and a cover 2 coupled to the opening side of the body 1.
[0014]
The body 1 and the cover 2 are connected by an uneven fitting between an assembly claw 1a provided on one side of the body 1 and an assembly hole 2b drilled in a tongue piece 2a projecting on one side of the cover 2. Is done.
[0015]
The interior of the body 1 is separated into two rectangular storage chambers 1A and 1B by a partition wall 1b.
[0016]
Contact terminals 3 and 3 are disposed on one of the bottom surfaces of the storage chambers 1A and 1B in the longitudinal direction.
[0017]
The contact terminals 3 and 3 are made of a conductive material and are formed in a substantially L shape. Fixed contact points 3 a and 3 a are provided on the outer surface of the shorter leg piece, and the fixed contact points 3 a and 3 a are provided on the bottom surface of the body 1. The tip 3b of the longer leg piece that is disposed is attached to the outside from the bottom surface of the body 1 to the outside.
[0018]
Common terminals 4 and 4 are disposed on the other side in the longitudinal direction of the bottom surfaces of the storage chambers 1A and 1B.
[0019]
The common terminals 4 and 4 are made of a conductive material, and are formed in a substantially L shape. The tip of the shorter leg piece is divided into two forks 4a and 4a and bent outward, and a movable contact 5 described later is provided. A support portion is formed that is slidably supported.
[0020]
The common terminals 4 and 4 are attached in a state in which a support portion composed of a bifurcated portion 4 a and 4 a is disposed on the bottom surface of the body 1 and the distal end 4 b of the longer leg piece is penetrated from the bottom surface of the body 1 to the outside.
[0021]
The movable contactors 5 and 5 are formed in a substantially U shape including a center piece 5a and both leg pieces 5b and 5c projecting in a direction substantially perpendicular to the center piece 5a from both end edges of the center piece 5a. Has a part.
[0022]
An extending piece 5d extends from the tip of one leg piece 5b. The extending piece 5d is once bent in a substantially arc shape in the direction of the central piece 5a, and then obliquely above the central piece 5a. A movable contact 5e is provided on the surface of the extended piece 5a on the center piece 5a side.
[0023]
Further, notches 5f and 5f are provided at both ends of the central piece 5a in the direction parallel to the leg pieces 5b and 5c.
[0024]
The movable contacts 5 and 5 are arranged in a state in which the forked portions 4a and 4a of the common terminals 4 and 4 protrude from the notches 5f and 5f to the inside of the U-shaped portion, and the forked portions 4a and 4a of the common terminals 4 and 4 are arranged. It is supported by a support portion made of 4a in a swingable manner.
[0025]
A notch 1c is provided on the side surface of the body 1 opposite to the side surface on which the contact terminal 3 is disposed, from the edge of the opening side of the body 1, and the push button 6 is pressed through the notch 1c. Mounted freely.
[0026]
The push button 6 has an operation body 6a having a substantially rectangular parallelepiped shape whose bottom surface and one side surface in the longitudinal direction are open, and an extending portion 6b extends from the top surface of the operation body 6a toward the one side surface opened. The arm bodies 6c and 6c having the square holes 6d and 6d on both sides of the installation portion 6b are formed into a substantially T shape.
[0027]
Protrusions 6f and 6f project from the opposing positions of both inner side surfaces along the extending portions 6b of the respective square holes 6d and 6d.
[0028]
The push button 6 accommodates a return spring 7 inside the operation body 6a, and one end of the return spring 7 is locked to a convex portion 1d provided below the notch 1c of the body 1 through the opened side surface. In the state, each arm body 6c, 6c is accommodated in the body 1 and arranged.
[0029]
A heart-shaped cam portion 6e is formed on the surface of the extended portion 6b of the push button 6 on the cover 2 side.
[0030]
The lock pin 8 is formed of a linear metal into a substantially U-shape comprising a central piece 8a and both leg pieces 8b, 8c, and one leg piece 8b is formed on the side surface of the body 1 on the side where the contact terminals 3 are disposed. The other leg piece 8c is slid along the outer peripheral portion of the heart-shaped cam portion 6e while pivotally supported in a hole 1e provided in the vicinity of the edge on the opening side.
[0031]
The holding spring 9 has a hole 9a provided at one end thereof attached to a convex portion 2c provided on the back surface of the cover 2, and always urges the lock pin 8 toward the heart-shaped cam portion 6e at the other end.
[0032]
The rotor 10 is rotatably supported by a bearing 2d provided on the back surface of the cover 2 parallel to the moving direction of the push button 6. Further, a convex portion 10 a is provided on the surface that becomes the body 1 side when the cover 2 is coupled to the body 1.
[0033]
The coiled reversing spring 11 has a diameter larger than the interval between the two convex portions 6f, 6f provided in the square holes 6d, 6d of the push button 6, and one end portion of the coiled reverse spring 11 is a convex portion 10a of the rotor 10. The other end is movable contact after passing between the convex portions 6f, 6f of the square holes 6d, 6d of the push button 6 and the inner side surfaces 6g, 6g on the operating body 6a side of the square holes 6d, 6d. It is inserted into the U-shaped portion of the child 5.
[0034]
Although the push switch configured as described above is omitted in detail, the push switch is attached to a printed board or the like by the mounting bracket 12 having mounting holes 12a and 12a.
[0035]
Next, the operation of this push switch will be described.
[0036]
In an initial state where the push button 6 is not pressed (off state), as shown in FIG. 1A, the push button 6 is urged outward by the return spring 7 from the body 1 to the outside. It protrudes.
[0037]
Further, the reversing springs 11 and 11 are bent in a substantially inverted letter shape in FIG. 1A, and the movable contacts 5 and 5 into which the other ends of the reversing springs 11 and 11 are inserted are the reversing springs 11 and 11. 11, the other leg piece 5c of the U-shaped portion is pushed from the inside and biased, and the central pieces 5a, 5a of the movable contactors 5, 5 are parallel to the bottom surface of the body 1 and are located obliquely above the central piece 5a. The movable contacts 5e, 5e to be moved are separated from the fixed contacts 3a, 3a. At this time, the contact interval x is 3 mm or more.
[0038]
Next, when the tip of the operating portion 6a of the push button 6 is pushed, the reversing springs 11 and 11 are pressed against the inner side surfaces 6g and 6g on the operating body 6a side of the square holes 6d and 6d of the push button 6, In conjunction with this, the movable contacts 5, 5 into which the other ends of the reversing springs 11, 11 are inserted rotate counterclockwise in FIG. 1 (a) with the bifurcated portions 4a, 4a of the common terminals 4, 4 as fulcrums. To go. Further, the rotors 10 and 10 to which one end portions of the reversing springs 11 and 11 are attached rotate clockwise in FIG.
[0039]
At a certain point, when the reversing springs 11 and 11 exceed the dead point, the bending is reversed, and the movable contacts 5 and 5 are rotated like a snap action, and fixed to the movable contacts 5e and 5e as shown in FIG. The contacts 3a and 3a come into contact with each other, and the push switch is turned on. At this time, the reversing springs 11 and 11 are bent into a substantially square shape.
[0040]
In this ON state, as shown in FIG. 1 (b), the reversing springs 11 and 11 are in contact with one leg piece 5b of the U-shaped portion of the movable contacts 5 and 5, and the U-shaped portion is pressed from the inside. The movable contacts 5 and 5 are biased in the direction in which the contact pressure between the movable contact 5e and the fixed contact 3a increases.
[0041]
This state is maintained when the lock pin 8 is engaged with the heart-shaped cam 6e.
[0042]
When the lock state of the lock pin 8 is released, the push button 6 moves toward the outside of the body 1 by the urging force of the return spring 7. At this time, the reversing springs 11 and 11 are pressed in the moving direction of the push button 6 by the projections 6 f and 6 f of the square holes 6 d and 6 d of the push button 6, and the movable contacts 5 and 5 are linked to the common terminal 4. , 4 is rotated clockwise in FIG. 1B with the bifurcated portions 4a, 4a as fulcrums. Further, the rotors 10 and 10 rotate counterclockwise in FIG.
[0043]
At a certain point, when the reversing springs 11 and 11 exceed the dead point, the bending is reversed, and the movable contacts 5 and 5 are rotated like a snap action, and fixed to the movable contacts 5e and 5e as shown in FIG. The contacts 3a and 3a are opened, and the push switch is turned off. At this time, the reversal springs 11 and 11 are bent in a substantially reverse letter shape.
[0044]
In such a push switch, when one end of the reversing springs 11, 11 is attached to the rotors 10, 10, the change of the bending of the reversing springs 11, 11 becomes smooth, and the other end of the reversing springs 11, 11 is connected. When the switch is turned on by being inserted into the U-shaped portion of the movable contact 5, 5, the bending of the reversing springs 11, 11 presses the U-shaped portion of the movable contact 5, 5 from the inside to move the switch. Since the movable contacts 5 and 5 are urged in the direction in which the contact pressure between the contact 5e and the fixed contact 3a increases, the contact pressure can be increased and high capacity switching can be performed.
[0045]
【The invention's effect】
The push switch according to claim 1 includes a push button that is slidably mounted by penetrating from one side of the body to the inside and outside, and a shaft that is rotatable on a ceiling surface of the body parallel to the moving direction of the push button. The rotor is supported, the contact terminal is made of a conductive material provided with a fixed contact on the bottom surface of the body, and the U-shaped portion formed in a substantially U-shape is fixed to the one leg piece side of the U-shape portion. A movable contact made of a conductive material provided with a movable contact corresponding to the contact; a common terminal made of a conductive material provided on a bottom surface of the container with a support portion for swingably supporting the movable contact; and one end portion The other end of the movable contact is inserted into the U-shaped portion of the movable contact, and the movable contact is swung by reversing the bending in conjunction with the pressing operation of the push button, and the movable contact wherein the fixed contact and a coil-shaped inversion springs to contact / open releasing the one end the instrument and And a rotatably supported by the lock pin to the push button includes an operation member having one end pressed in the moving direction, extends which extends in the moving direction from the other end of the operating body And the position where the push button is turned on by sliding the other end of the lock pin along the outer peripheral portion formed on the surface of the extended portion facing the ceiling surface of the container. And a pair of arm bodies provided on both sides of the extending portion with a through hole into which the reversing spring is inserted and sandwiching the heart-shaped cam portion . By attaching one end of the reversing spring to the rotor, the reversing spring bends smoothly, and by inserting the other end of the reversing spring into the U-shaped portion of the movable contact, Before the push button is pushed When the bending of the reversing spring is reversed and the movable contact and the fixed contact come into contact with each other, the bending of the reversing spring presses the U-shaped portion of the movable contact from the inside, and the contact pressure between the movable contact and the fixed contact Therefore, there is an effect that a high capacity can be opened and closed.
[Brief description of the drawings]
FIG. 1A is a longitudinal sectional view of a push switch according to an embodiment when the push switch is off.
(B) It is a longitudinal cross-sectional view at the time of ON of a push switch same as the above.
FIG. 2A is an exploded perspective view of the above.
(B) It is a disassembled perspective view of the back surface of a cover same as the above.
FIG. 3 is a longitudinal sectional view of a conventional push switch.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Body 2 Cover 3 Contact terminal 3a Fixed contact 4 Common terminal 5 Movable contact 5e Movable contact 6 Push button 7 Return spring 8 Lock pin 9 Pressing spring 10 Rotor 11 Reverse spring

Claims

A push button that is slidably mounted from one side of the container to the inside and outside, a rotor that is rotatably supported on the ceiling surface of the container parallel to the moving direction of the push button, and the container A contact terminal made of a conductive material provided with a fixed contact on the bottom surface thereof, and a U-shaped portion formed in a substantially U shape, and a movable contact corresponding to the fixed contact provided on one leg piece side of the U shape portion A movable contact made of a conductive material, a common terminal made of a conductive material provided on the bottom surface of the container with a support portion for swingably supporting the movable contact, and one end attached to the rotor and the other end Is inserted into the U-shaped portion of the movable contact, and the movable contact is swung by reversing the bending in conjunction with the pressing operation of the push button to contact / open the movable contact and the fixed contact. a coiled reversing spring to released, the locking pin, one end of which is rotatably supported on the device body Wherein the push button includes an operation member having one end pressed to the moving direction, and extending portion that extends in the moving direction from the other end of the operating body, the device of the extending portion A heart-shaped cam portion that is formed on a surface facing the ceiling surface of the body and that locks the push button in an on position and an off position by sliding the other end of the lock pin along the outer peripheral portion, respectively. A push switch having a through-hole into which the reversing spring is inserted and a pair of arm bodies provided on both sides of the extending portion across the heart-shaped cam portion .