JP2004221032A

JP2004221032A - Push switch

Info

Publication number: JP2004221032A
Application number: JP2003010282A
Authority: JP
Inventors: Yoshiyuki Yamawaki; 佳之山脇; Ryoji Ito; 良治伊藤
Original assignee: Matsushita Electric Works Ltd
Current assignee: Panasonic Electric Works Co Ltd
Priority date: 2003-01-17
Filing date: 2003-01-17
Publication date: 2004-08-05
Anticipated expiration: 2023-01-17
Also published as: JP4203642B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a push switch with small variations in operating positions and with high accuracy. <P>SOLUTION: This push switch comprises a push button 6 penetrating in and out from one side surface of a switch body to be mounted pressably; a rotor 10 pivotally supported rotatably on a ceiling surface of the switch body; a contact terminal 3 of which the fixed contact 3a is disposed on a bottom surface of the switch body; a movable contactor 5 having a U-shape portion formed in an approximately U shape and of which the movable contact 5e is provided on one leg piece side of the U-shape portion; a common terminal 4 of which the support portion to rockably support the contactor 5 is disposed on the bottom surface of the switch body; and an inverting spring 11 of which the one end is mounted on the rotor 10 and the other end is inserted into the U-shape portion of the contactor 5. In the push button 6, a pressing portion is disposed to press the other leg piece of the U-shape portion of the contactor 5 when the push button 6 is pressed, rock the contactor 5 to inverse the deflection of the spring 11, and make contact/separation of the movable contact 5e to/from the fixed contact 3a. <P>COPYRIGHT: (C)2004,JPO&NCIPI

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４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】
上記した従来のプッシュスイッチでは、押し釦１０２で反転スプリング１０６を押すことにより可動接触子１０４を回転させオン状態からオフ状態へのスイッチの切り替え動作を行っていた。
【０００７】
しかしながら、反転スプリングはコイルスプリングであり加工上ばらつきが大きく、また、反転スプリングの一端が固定されたカバーの突起部に係止されているため、反転スプリングの撓みのばらつきも大きく、スイッチ反転時の押し釦の位置（動作位置）のばらつきが大きいという問題があった。
【０００８】
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、動作位置のばらつきが小さい高精度なプッシュスイッチを提供することにある。
【０００９】
【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たコイル状の反転スプリングとを備え、前記押し釦に、前記押し釦が押操作されると前記可動接触子のコ字部の他方の脚片を押圧し、前記反転スプリングの撓みを反転させるように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／開離させる押圧部を設けたものとした。
【００１０】
【発明の実施の形態】
以下、本発明の一実施形態を図１乃至図３を用いて説明する。
【００１１】
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。
【００１２】
このプッシュスイッチは、図１および図２に示すように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。
【００１３】
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。
【００１４】
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。
【００１５】
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。
【００１６】
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。
【００１７】
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。
【００１８】
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。
【００１９】
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。
【００２０】
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。
【００２１】
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。
【００２２】
他方の脚片５ｃの先端は外側に短く折曲され、舌片５ｇを形成している。
【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と直交する方向の幅は、可動接触子５の舌片５ｇの幅より若干大きめに形成され、また、角孔６ｄの延設部６ｂに沿った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】
各腕体６ｃ，６ｃをボディ１の内部に収納すると、可動接触子５，５の他方の脚片５ｃの先端に設けた舌片５ｇが、夫々の角孔６ｄ，６ｄの凸部６ｆ，６ｆと、角孔６ｄ，６ｄの操作体６ａ側の内側面６ｇ，６ｇとの間に配置される。
【００３０】
ここで、凸部６ｆ，６ｆと、角孔６ｄ，６ｄの操作体６ａ側の内側面６ｇ，６ｇとは、押し釦６が押操作されると可動接触子５のコ字部の他方の脚片５ｃに設けられた舌片５ｇを押圧し、後述する反転スプリング１１の撓みを反転させるように可動接触子５を揺動させる押圧部を形成している。
【００３１】
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。
【００３２】
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。
【００３３】
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。
【００３４】
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。
【００３５】
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間の間隔よりも小さく形成され、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を通った後に可動接触子５の前記コ字部に挿入される。
【００３６】
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。
【００３７】
次に、このプッシュスイッチの動作について説明する。
【００３８】
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。
【００３９】
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。
【００４０】
次に、押し釦６の操作部６ａの先端が押し操作されると、図３に示すように、可動接触子５，５は舌片５ｇ，５ｇが、押圧部としての押し釦６の角孔６ｄ，６ｄの操作体６ａ側の内側面６ｇ，６ｇに押されて共通端子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。
【００４１】
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。
【００４２】
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。
【００４３】
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、可動接触子５，５は舌片５ｇ，５ｇが、押圧部としての押し釦６の凸部６ｆ，６ｆにより押し釦６の移動方向へと押されて共通端子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。
【００４４】
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。
【００４５】
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、押し釦１０２の角孔６ｄの内側面６ｇと凸部６ｆとからなる押圧部で可動接触子５，５の舌片５ｇ，５ｇを押圧して、反転スプリング１１の撓みを反転させるように可動接触子５，５を揺動させ、スイッチをオン状態からオフ状態へと切り替えているので、反転スプリング１１，１１を押圧してスイッチを切り替える場合よりも、動作位置のばらつきが小さく高精度なプッシュスイッチとなる。
【００４６】
【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たコイル状の反転スプリングとを備え、前記押し釦に、前記押し釦が押操作されると前記可動接触子のコ字部の他方の脚片を押圧し、前記反転スプリングの撓みを反転させるように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／開離させる押圧部を設けたので、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の変化がスムーズになると共に、前記押し釦が押操作されると前記押圧部が前記可動接触子のコ字部の他方の脚片を押圧して、前記反転スプリングの撓みを反転させるように前記可動接触子を揺動させるので、前記反転スプリングを押圧して前記可動接触子を揺動させるよりも、動作位置のばらつきが小さく高精度なプッシュスイッチを実現でき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】同上でカバーを外した時の平面図である。
【図４】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]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a push switch for opening and closing an open / close unit by pressing a push button.
[0002]
[Prior art]
As a conventional push switch of this type, there is, for example, one having a structure shown in FIG. 4 (a switch having a similar structure is also disclosed in Patent Document 1).
[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 push switch penetrating from one side to inside and outside of the body 100 so as to be capable of being pushed. A push button 102 having a hole 102a at a portion disposed on the other end; a contact terminal 103 having one end having a fixed contact 103a disposed inside the body 100 and the other end penetrating through the bottom surface of the body 100 and protruding outside; A movable contact 104 having a substantially U-shape and having a movable contact 104a fixed to one end and having the other end cut short and bent outward to provide a tongue 104b; and a movable contact 104 centered on a swing fulcrum 105a. And a common terminal 105 having one end penetrating through the bottom surface of the body 100 and protruding to the outside, and one end locked by a tongue piece 104b of the movable contact 104. Is pressed through a hole 102a of the push button 102 and in a coiled reversing spring 106 locked on a projection 101a provided on the back surface of the cover 101, and biases the push button 102 in a direction to protrude outward from the body 100. A return spring 107 is provided.
[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 is fixed. 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 turned off.
[0005]
[Patent Document 1]
JP-A-6-139870
[Problems to be solved by the invention]
In the conventional push switch described above, the movable contact 104 is rotated by pressing the reversing spring 106 with the push button 102, and the switch is switched from the on state to the off state.
[0007]
However, since the reversing spring is a coil spring, there is a large variation in processing, and since one end of the reversing spring is locked to the projection of the fixed cover, the variation in the bending of the reversing spring is large, and the switch reversal is difficult. There has been a problem that the position (operation position) of the push button varies widely.
[0008]
SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a high-precision push switch having a small variation in operation position.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, a push switch according to claim 1 is provided with a push button penetrating in and out from one side of the body and being movably mounted, and a body parallel to a moving direction of the push button. A rotor rotatably supported on the ceiling surface of the device, a contact terminal made of a conductive material having 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 of the legs, and a conductive material provided on the bottom surface of the body with a supporting portion for swingably supporting the movable contact. And a coil-shaped reversing spring having one end attached to the rotor and the other end inserted into the U-shaped portion of the movable contact, wherein the push button is pressed by the push button. When operated, the other leg of the U-shaped portion of the movable contact is pressed, and The deflection of the ring to oscillate the movable contactor so as to reverse, and those provided with the pressing portion to the movable contact said fixed contactor / Open separated.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
[0011]
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.
[0012]
As shown in FIGS. 1 and 2, this push switch has a body made of a body 1 formed of a synthetic resin into a substantially box shape with one surface opened, and a cover 2 coupled to the opening side of the body 1. You.
[0013]
The body 1 and the cover 2 are connected by an assembling of an assembling claw 1a provided on one side surface of the body 1 and an assembling hole 2b formed in a tongue piece 2a protruding from one side surface of the cover 2. Is done.
[0014]
The inside of the body 1 is separated by a partition 1b into two rectangular storage chambers 1A and 1B.
[0015]
Contact terminals 3 are provided on one of the longitudinal sides of the bottom surfaces of the storage chambers 1A and 1B.
[0016]
The contact terminals 3, 3 are made of a conductive material and formed in a substantially L-shape. Fixed contacts 3a, 3a are provided on the outer surface of the shorter leg, and the fixed contacts 3a, 3a are mounted on the bottom surface of the body 1. It is attached in a state where the distal end 3b of the longer and longer leg piece is pierced from the bottom surface of the body 1 to the outside.
[0017]
Common terminals 4 and 4 are provided on the other of the bottom surfaces of the storage chambers 1A and 1B in the longitudinal direction.
[0018]
The common terminals 4 and 4 are formed of a conductive material and are formed in a substantially L-shape. The tip of the shorter leg is divided into two forks 4a and 4a and bent outward to form a movable contact 5 which will be described later. A supporting portion for swingably supporting is formed.
[0019]
The common terminals 4 and 4 are attached in a state where a support portion including the forked portions 4a and 4a is provided on the bottom surface of the body 1 and the tip 4b of the longer leg piece penetrates from the bottom surface of the body 1 to the outside.
[0020]
The movable contacts 5, 5 have a substantially U-shape formed by a central piece 5a and two leg pieces 5b, 5c protruding from both end edges of the central piece 5a in a direction substantially perpendicular to the central piece 5a. Part.
[0021]
An extension piece 5d extends from the tip of one of the leg pieces 5b. The extension piece 5d is bent once in a substantially arc shape in the direction of the center piece 5a, and then diagonally above the center piece 5a. The movable contact 5e is provided on the surface of the end of the extension piece 5a on the side of the center piece 5a.
[0022]
The tip of the other leg piece 5c is bent short outside and forms a tongue piece 5g.
[0023]
Notches 5f, 5f are provided at both ends of the central piece 5a in a direction parallel to the two leg pieces 5b, 5c.
[0024]
The movable contacts 5, 5 are arranged such that the forked portions 4a, 4a of the common terminals 4, 4 protrude from the notches 5f, 5f to the inside of the U-shaped portion, and the forked portions 4a, 4a, The supporting portion 4a is swingably supported.
[0025]
A notch 1c is provided on the side of the body 1 opposite to the side on which the contact terminals 3 are provided, from the edge on the opening side of the body 1, and the push button 6 is pushed through the notch 1c. Mounted movably.
[0026]
The push button 6 has a substantially rectangular parallelepiped operating body 6a having an open bottom surface and one side surface in the longitudinal direction, and an extending portion 6b extending from the upper surface of the operating body 6a in the direction of the opened one side surface. Arms 6c, 6c having square holes 6d, 6d on both sides of the setting portion 6b are formed into a substantially T-shaped shape protruding.
[0027]
The width of each of the square holes 6d, 6d in the direction orthogonal to the extending portion 6b is formed slightly larger than the width of the tongue piece 5g of the movable contact 5, and extends along the extending portion 6b of the square hole 6d. Protrusions 6f, 6f are protrudingly provided at positions facing the inner surface.
[0028]
The push button 6 houses the return spring 7 inside the operating body 6a, and locks one end of the return spring 7 to the convex portion 1d provided below the notch 1c of the body 1 through the opened one side surface. In this state, the arms 6c, 6c are housed and arranged inside the body 1.
[0029]
When the arms 6c, 6c are housed inside the body 1, the tongue pieces 5g provided at the tips of the other leg pieces 5c of the movable contacts 5, 5 become convex portions 6f, 6f of the respective square holes 6d, 6d. And the inner surfaces 6g, 6g of the square holes 6d, 6d on the operation body 6a side.
[0030]
Here, the projections 6f, 6f and the inner surfaces 6g, 6g of the square holes 6d, 6d on the side of the operating body 6a are connected to the other leg of the U-shaped portion of the movable contact 5 when the push button 6 is pressed. A pressing portion for pressing the tongue piece 5g provided on the piece 5c and swinging the movable contact 5 so as to reverse the bending of the reversing spring 11 described later is formed.
[0031]
A heart-shaped cam portion 6e is formed on the surface of the extension portion 6b of the push button 6 on the cover 2 side.
[0032]
The lock pin 8 is formed in a substantially U-shape including a central piece 8a and both leg pieces 8b and 8c by a linear metal, and one of the leg pieces 8b is formed on the side of the body 1 on the side where the contact terminals 3 are provided. The other leg 8c is slid along the outer periphery of the heart-shaped cam portion 6e while being rotatably supported by a hole 1e provided near the edge on the opening side.
[0033]
The pressing spring 9 has a hole 9a provided at one end thereof attached to a convex portion 2c provided at the back surface of the cover 2, and constantly biases the lock pin 8 at the other end thereof in the direction of the heart-shaped cam portion 6e.
[0034]
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. In addition, a projection 10a is provided on a surface that becomes the body 1 side when the cover 2 is coupled to the body 1.
[0035]
The coil-shaped reversing spring 11 is formed to have a diameter smaller than an interval between two convex portions 6 f provided in the square holes 6 d of the push button 6, and has one end portion of the convex portion 10 a of the rotor 10. After the other end of the movable contact 5 has passed through the square holes 6d and 6d of the push button 6, the movable contact 5 is inserted into the U-shaped portion.
[0036]
Although not described in detail, the push switch configured as described above is attached to a printed board or the like by an attachment fitting 12 having attachment holes 12a.
[0037]
Next, the operation of the push switch will be described.
[0038]
In the initial state (off state) in which the push button 6 is not pressed, 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 is protruding.
[0039]
In addition, the reversing springs 11, 11 are bent in a substantially inverted letter shape in FIG. 1A, and the movable contacts 5, 5 into which the other ends of the reversing springs 11, 11 are inserted, are movable. 11, the other leg 5c of the U-shaped portion is pressed and urged from the inside, and the central pieces 5a, 5a of the movable contacts 5, 5 are parallel to the bottom surface of the body 1, and are located diagonally above the central piece 5a. The movable contacts 5e, 5e are separated from the fixed contacts 3a, 3a. At this time, the contact interval x is 3 mm or more.
[0040]
Next, when the distal end of the operating portion 6a of the push button 6 is pushed, as shown in FIG. 3, the movable contacts 5, 5 have the tongue pieces 5g, 5g and the rectangular holes of the push button 6 as the pushing portion. The common terminals 4 and 4 are pushed by the inner surfaces 6g and 6g on the side of the operation body 6d and rotate in the counterclockwise direction in FIG. 1A with the forked portions 4a and 4a of the common terminals 4 and 4 as fulcrums. Further, the rotors 10, 10 to which one ends of the reversing springs 11, 11 are mounted rotate clockwise in FIG. 1A.
[0041]
At a certain point, when the reversing springs 11 and 11 exceed the dead center, the bending is reversed, and the movable contacts 5 and 5 are rotated in a snap action, and fixed to the movable contacts 5e and 5e as shown in FIG. The contacts 3a and 3a come into contact, and the push switch is turned on. At this time, the reversing springs 11 and 11 are bent in a substantially rectangular shape.
[0042]
This state is maintained by locking the lock pin 8 to the heart-shaped cam 6e.
[0043]
When the locked state of the lock pin 8 is released, the push button 6 moves outward of the body 1 by the urging force of the return spring 7. At this time, the tongue pieces 5g, 5g of the movable contacts 5, 5 are pushed in the moving direction of the push button 6 by the convex portions 6f, 6f of the push button 6 as the pushing portion, and the forked portions of the common terminals 4, 4 are formed. Rotating clockwise in FIG. 1B with 4a as a fulcrum. Further, the rotors 10, 10 rotate counterclockwise in FIG. 1B.
[0044]
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 in 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 reversing springs 11, 11 are bent in a substantially inverted letter shape.
[0045]
In such a push switch, the change in the bending of the reversing springs 11 and 11 is smoothed by attaching one end of the reversing springs 11 and 11 to the rotor 10 and the inner surface of the square hole 6d of the push button 102. By pressing the tongue pieces 5g, 5g of the movable contacts 5, 5 with a pressing portion composed of 6g and the convex portion 6f, the movable contacts 5, 5 are swung so as to reverse the bending of the reversing spring 11, and the switch is turned on. Is switched from the on-state to the off-state, and the push switch has a smaller variation in the operating position and a higher accuracy than when the switch is switched by pressing the reversing springs 11 and 11.
[0046]
【The invention's effect】
The push switch according to claim 1, wherein the push button penetrates in and out from one side of the body and is rotatably mounted on the push button, and the push switch is rotatably mounted on a ceiling surface of the body parallel to a moving direction of the push button. A rotor that is supported, a contact terminal made of a conductive material having a fixed contact provided 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 contact, a common terminal made of a conductive material provided on a bottom surface of the body with a support portion for swingably supporting the movable contact, and one end portion A coil-shaped reversing spring mounted on the rotor and having the other end inserted into the U-shaped portion of the movable contact, wherein the movable button is pressed when the push button is pressed. Press the other leg of the U-shaped portion to reverse the bending of the reversing spring. The movable contact is provided with a pressing portion for swinging the movable contact and contacting / separating the movable contact and the fixed contact, so that one end of the reversing spring is attached to the rotor so that As the change in the bending becomes smooth, when the push button is pressed, the pressing portion presses the other leg of the U-shaped portion of the movable contact so as to reverse the bending of the reversing spring. Since the movable contact is swung, there is an effect that a highly accurate push switch can be realized with less variation in the operating position than when the movable contact is swung by pressing the reversing spring.
[Brief description of the drawings]
FIG. 1A is a vertical cross-sectional view when a push switch according to an embodiment is turned off.
(B) It is a longitudinal cross-sectional view when the push switch of the above is turned on.
FIG. 2 (a) is an exploded perspective view of the same.
(B) It is an exploded perspective view of the back of the same cover.
FIG. 3 is a plan view when the cover is removed in the first embodiment.
FIG. 4 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 Holding spring 10 Rotor 11 Inverting spring

Claims

A push button pierced from one side to the inside and outside so as to be movably mounted, a rotor rotatably supported on a ceiling surface of the body parallel to a moving direction of the push button, and a body; A contact terminal made of a conductive material having a fixed contact provided on the bottom surface thereof, and a U-shaped part formed in a substantially U-shape, and a movable contact corresponding to the fixed contact is provided on one leg side of the U-shaped part. A movable contact made of a conductive material, a common terminal made of a conductive material provided on the bottom surface of the body with a support portion for swingably supporting the movable contact, and one end mounted on the rotor and the other end A coil-shaped reversing spring inserted into the U-shaped portion of the movable contact, and the other leg of the U-shaped portion of the movable contact when the push button is pressed. And swinging the movable contact so as to reverse the bending of the reversing spring, Push switch, characterized in that a pressing portion which the to the fixed contacts contact / open away and moving contacts.