JP2004362979A

JP2004362979A - Switching arrangement

Info

Publication number: JP2004362979A
Application number: JP2003161054A
Authority: JP
Inventors: Hidetoshi Takeyama; 英俊竹山; Hirohisa Tanaka; 博久田中; Hideaki Sakota; 秀昭迫田
Original assignee: Matsushita Electric Works Ltd
Current assignee: Panasonic Electric Works Co Ltd
Priority date: 2003-06-05
Filing date: 2003-06-05
Publication date: 2004-12-24

Abstract

<P>PROBLEM TO BE SOLVED: To provide a switching arrangement capable of preventing dust from infiltrating into an arrangement body without using a special dust-proof structure, and of being miniaturized. <P>SOLUTION: This arrangement body 1 is provided with a recessed bearing part 10 to store the ring-shaped rotary spindle body 20 of a rotary handle body 2 and to rotatably guide the outer peripheral surface of the rotary spindle body 20 by its inner peripheral surface. An operating body 21 is protruded from the outer peripheral surface of the rotary spindle body, and the operating body 21 is protruded to the outside from a window hole 12 formed in the peripheral wall of the recessed bearing part 10. An almost circular reset spring body 3 is inserted through a cylindrical body 11 raised from the bottom part in the almost center part of the recessed bearing part 10, and a movable contact spring 4 is disposed in a space between the cylindrical body 11 and the inner peripheral surface of the rotary spindle body 20. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、中性点付き切り替え型のスイッチ装置に関するものである。
【０００２】
【従来の技術】
従来、この種のスイッチ装置としては、下端が軸支された操作体と、この操作体の左右両側に配置しているカムの一方を操作体の回転方向に応じて押し駆動し、このカムの駆動により板ばねからなる可動接触ばねを撓ませ、この撓みに応じて端部に設けている可動接点部を固定接点部へ移動させて接触させ、操作体の回転操作力の解除時に可動接触ばねの復帰力により操作体を元の位置に復帰させるようになっているものが提供されている（特許文献１）。
【０００３】
【特許文献１】
特開２００２−１５０８８５号公報
【０００４】
【発明が解決しようとする課題】
前記の従来例では、操作体の両側にカムを配置するために、操作体を外部に露出させるための窓孔からの器体内への塵埃の侵入防止を確実なものにするのは難しかった。
【０００５】
また可動接触ばねの収納スペースをカムなどの機構部の収納スペースとは別に設けなければならず、装置本体の小型化に限界があった。
【０００６】
更に前記従来例の可動接触ばねは中央部の両端に逆Ｕ字状に折り曲げた部位を延長形成し、その延長先端に可動接点部を形成したものであるが、左右の形状のばらつきにより、中立位置から操作体を動かす力が左右方向においてばらつく恐れがあった。
【０００７】
本発明は、上述の点に鑑みて為されたもので、その目的とするところは装置本体内への塵埃の侵入を特別な防塵構成を用いることなく防ぐことができ、しかも小型化が図れるスイッチ装置を提供することにある。
【０００８】
【課題を解決するための手段】
上述の目的を達成するために、請求項１の発明では、円環状の回転軸体と該回転軸体の外周面より突出させた操作体とからなる回転ハンドル体と、前記回転軸体を収納して内周面で前記回転軸体の外周面を回動自在にガイドする軸受け凹部と該軸受け凹部の略中心部の底部から立設され、前記回転軸体の中央部に配置される円柱体と前記軸受け凹部の周壁に形成され、前記軸受け凹部から外部へ且つ、周方向の両端間で移動自在に前記操作体を貫挿させる窓孔とを備えた装置本体と、前記操作体の中心と回転軸体の中心とを結ぶ線に対して線対称的な位置で且つ前記回転軸体の内周面と前記円柱体の外周面との間の軸受け凹部の底部上を周方向に移動自在となるように配置されるとともに、前記回転軸体の回転方向に対応して設けられ、前記回転軸体の回転方向に応じて軸受け凹部の周方向に共動する１対の可動接点部を動かす可動接触ばねと、前記操作体の中心と回転軸体の中心とを結ぶ線に対して線対称的に、前記軸受け凹部の底部に設けられ、前記操作体の操作移動方向に連動した前記回転軸体の回転に共動する一方の可動接触ばねの可動接点部と接触する１対の固定接点部と、前記円柱体に被挿されるとともに、前記操作体の操作移動に伴う前記回転軸体の回転時に一方の端部の動きが規制され、他方の端部が前記回転軸体に係合して回転方向に押動されることで反回転方向の弾発力を蓄積し、前記操作体の操作力が解除されたときに前記弾発力で前記回転軸体を復帰回転させる略環状のばね体とを備え、前記装置本体には前記固定接点部に夫々電気的に接続されている第１、第２のスイッチ端子と、前記可動接触ばねが電気的に接続される共通端子とを備えていることを特徴とする。
【０００９】
請求項１の発明によれば、回転ハンドル体の操作体を外部へ突出させる窓孔が回転軸体の外周面で閉鎖された状態にあるため、特別な防塵構成を用いることなく、外部から装置本体内への塵埃の侵入を防止でき、しかも可動接触ばねや復帰用ばね体を回転ハンドル体の回転軸体内に収納されることで、スペースの有効利用によりスイッチ装置の小型化が容易となる。
【００１０】
請求項２の発明では、請求項１の発明において、前記ばね体は、一端部と他端部とをほぼ同じ側面位置から外方へ突出させ、その一端部と他端部とを両側面に当接してこれら端部を弾発力に抗して中心から見て一定角度に拡開させる円弧状突起を前記軸受け凹部の底部に突出すするとともに、該円弧状突起を左右に２分する中心線を、前記操作体の中心と前記回転軸体の中心とを結ぶ線上に設定し、前記回転軸体の中心から見て前記円弧状突起の両側面の開き角度と同じ開き角度の両側面を有し且つ左右に２分する中心線を前記操作体の中心と前記回転軸体の中心とを結ぶ線上に設定した係合突起を前記軸受け凹部の内周面に突設し、前記操作体が移動範囲の中心位置にある場合に、前記復帰用ばね体の一端部と他端部とを前記円弧状突起の両側面と前記係合突起の両側面と亘るように当接し、前記操作体の移動時に移動方向の前方側となる前記係合突起の側面にてばね体の対応端部を押し動かし、移動方向の後方側の前記円弧状突起の側面で他方の端部の動きを規制することで前記復帰用ばね体に反回転方向の弾発力を蓄積することを特徴とする。
【００１１】
請求項２の発明によれば、操作体の中立位置が復帰用ばね体の左右方向の復帰力の影響を受けることなく定位置に定まり、しかも略環状のばね体によるため左右方向の復帰力のばらつきがなく、特別なばね調整を行う必要もない。
【００１２】
請求項３の発明では、請求項２の発明において、前記復帰用ばね体は、コイル部位を前記円柱体に被挿し、該コイル部位の側面より外方へ突出させた両端部を、前記操作体が移動範囲の中心位置にある状態で、前記円弧状突起及び係合突起の両側面に弾接させるつるまきばねで形成され、前記可動接触ばねは、前記操作体の中心と前記回転軸体の中心とを結ぶ線上で操作体の突出位置とは反対側の前記回転軸体の部位により中心部が固持され、前記中心部から前記回転軸体の周方向に沿うように左右方向に対称的に延長された各腕片の先部に可動接点部を設けた円弧状の板ばねにより形成され、前記軸受け凹部には、上記一対の固定接点部を設けた位置間で且つ上記可動接触ばねの下方に位置する部位に、共通端子に電気的に接続された共通接点部を設け、前記回転軸体の回転時に前記可動接触ばねの一方の可動接点部が固定接点部に接触している状態で、他方の可動接点部を共通接点に接触させることを特徴とする。
【００１３】
請求項３の発明によれば、何れの固定接点部への接触時においても、スイッチ端子と共通端子との間の導電経路の長さが同じとなり、切り替えの抵抗差が生じず、そのためばらつきのないスイッチ出力が得られる。
【００１４】
請求項４の発明では、請求項２の発明では、前記復帰用ばね体は、コイル部位を前記円柱体に被挿し、該コイル部位の側面より外方へ突出させた両端部を、前記操作体が移動範囲の中心位置にある状態で、前記円弧状突起及び係合突起の両側面に弾接させたつるまきばねで形成され、前記可動接触ばねは、上記つるまきばねで形成され、上記両端部から夫々延長形成した延長部位の先部に可動接点部を形成し、前記軸受け凹部は、前記円柱体の基部周辺部位に前記共通端子に電気的に接続され、前記円柱体に被挿される上記つるまきばねのコイル部位の端部が載置されることで前記つるまきばねと電気的に接続される共通接点部を形成していることを特徴とする。
【００１５】
請求項４の発明によれば、可動接触ばねと復帰用ばね体を一つのつるまきばねで兼用できるため、部品数を削減できてコストダウンが図れる。
【００１６】
請求項５の発明では、請求項２の発明において、前記復帰用ばね体は、コイル部位を前記円柱体に被挿し、該コイル部位の側面より外方へ突出させた両端部を、前記操作体が移動範囲の中心位置にある状態で、前記円弧状突起及び係合突起の両側面に弾接させたつるまきばねで形成され、前記可動接触ばねは、上記つるまきばねで形成され、上記両端部から夫々延長形成した延長部位の先部に可動接点部を形成し、前記軸受け凹部は、上記一対の固定接点部を設けた位置間で且つ上記可動接触ばねの下方に位置する部位に、共通端子に電気的に接続された共通接点部を設け、前記回転軸体の回転時に前記可動接触ばねの一方の可動接点部が固定接点部に接触している状態で、他方の可動接点部を共通接点に接触させることを特徴とする。
【００１７】
請求項５の発明によれば、可動接触ばねと復帰用ばね体を一つのつるまきばねで兼用できるため、部品数を削減できてコストダウンが図れる上に、何れの固定接点部への接触時においても、スイッチ端子と共通端子との間の導電経路の長さが同じとなり、切り替えの抵抗差が生じず、そのためばらつきのないスイッチ出力が得られる。
【００１８】
請求項６の発明では、前記復帰用ばね体は、板面が軸方向に並行するように曲げて形成した略環状部位を前記円柱体に被挿し、該環状部位の外方へ突出させた両端部を、前記操作体が移動範囲の中心位置にある状態で、前記円弧状突起及び係合突起の両側面に弾接させた板ばねにより形成され、前記可動接触ばねは、前記板ばねにより形成され、前記両端部から前記回転軸体の内周面に沿うように左右方向に対称的に延長形成された腕片の先端に可動接点部を形成し、前記軸受け凹部は、上記一対の固定接点部を設けた位置間で且つ上記可動接触ばねの下方に位置する部位に、共通端子に電気的に接続された共通接点部を設け、前記回転軸体の回転時に前記可動接触ばねの一方の可動接点部が固定接点部に接触している状態で、他方の可動接点部を共通接点に接触させることを特徴とする。
【００１９】
請求項６の発明によれば、可動接触ばねと復帰用ばね体を板ばねで一体形成できるため、部品数を削減できてコストダウンが図れる上に、何れの固定接点部への接触時においても、スイッチ端子と共通端子との間の導電経路の長さが同じとなり、切り替えの抵抗差が生じず、そのためばらつきのないスイッチ出力が得られる。
【００２０】
【発明の実施の形態】
以下本発明を実施形態により説明する。
【００２１】
（実施形態１）
本実施形態を図１〜図６により説明する。
【００２２】
本実施形態を構成部材は、合成樹脂成形品からなるボディ１Ａと、このボディ１Ａの開口側面を被蔽する金属製カバー１Ｂとからなる装置本体１と、回転ハンドル体２と、つるまきばねからなる復帰用ばね体３と、板ばねからなる可動接触ばね４と、ボディ１Ａに埋設された固定接点部５ａ、５ｂを有するスイッチ端子６ａ、６ｂ及び共通接点部７を備えた共通端子８とで構成される。
【００２３】
回転ハンドル体２は、環状の回転軸体２０と、この回転軸体２０の周壁の外面より一体突設した操作体２１と、操作体２１の突出位置に対して中心を挟んで反対側の周壁部に設けた可動接触ばね４の固定部２２と、操作体２１を突出させた周壁部位の内周面側に突出させた後述する係合突起２３とからなる。
【００２４】
ボディ１Ａは中央部に回転ハンドル体２の回転軸体２０の外周面を周方向にガイドする内周面を設けた軸受け凹部１０と、この軸受け凹部１０の底部中心より同心状に一体突出させた円柱体１１と、軸受け凹部１０の外周壁に形成し、回転ハンドル体２の操作体２１を外部に突出させる窓孔１２と、軸受け凹部１０の中心に対して同心で軸受け凹部１０の底部から一体的に突出させている円弧状突起１６とを備えている。
【００２５】
窓孔１２は、回転ハンドル体２の操作体２１を操作して軸受け凹部１０の周方向に所定の回転角度の回転軸体２０を回転させることができるように、軸受け凹部１０の周方向が長手となっている。
【００２６】
円弧状突起１６は、窓孔１２の中心と軸受け凹部１０の中心とを通る線を中心として左右に一定長の長さを持つもので、円柱体１１よりやや離れた軸受け凹部１０の底部から突出している。
【００２７】
この円弧状突起１６に対して中心から見た角度と、上記回転ハンドル体２に形成した係合突起２３に対して中心から見た角度とは同じ角度に設定される。また軸受け凹部１０内に回転ハンドル体２の回転軸体２０を周方向に回転自在に嵌め込み、操作体２１の中心線と窓孔１２の中心位置とを併せたときに、係合突起２３と、円弧状突起１６とが微小な間隙を介して対向配置されるように夫々の厚さ寸法が設定されている。
【００２８】
また円弧状突起１６の両側の軸受け凹部１０の底部には固定接点部５ａ、５ｂを線対称的に露出させている。これら固定接点部５ａ、５ｂの接触面は軸受け凹部１０の底部と同じ高さとしている。これらの固定接点部５ａ、５ｂはボディ１Ａにインサート成形により埋設した導電板５０ａ、５０ａに設けられたもので、導電板５０ａ、５０ｂにはボディ１Ａの両側側面より外部に突出させているスイッチ端子６ａ、６ｂも一体に設けてある。
【００２９】
一方円弧状突起１６から離れた側の固定接点部５ａ、５ｂの端部間の軸受け凹部１０の底部には共通接点部７を露出させている。この共通接点部７はボディ１Ａにインサート成形により埋設された導電板５０ｃに設けられたもので、接触面は軸受け凹部１０の底部と同じ高さとし、この共通接点部７の端部と対向する固定接点部５ａの端部及び固定接点部５ｂの端部との間には軸受け凹部１０の底部を介在させている。導電板５０ｃはボディ１Ａの両側面より突出させている共通端子８、８を一体に設けてある。
【００３０】
可動接触ばね４は、図３に示すように円弧状に板ばねを打ち抜き形成したもので、中心部には回転ハンドル体２に固定されるための被固定部４１を設け、この被固定部４１の両側には先端に２つの可動接点からなる可動接点部４０ａ、４０ｂを夫々設けている円弧状の腕片４２、４２を線対称的に夫々形成している。
【００３１】
腕片４２は先部に並行形成した一対の接触片４３、４３を設け、これらの接触片４３、４３の先端をＶ字状に折り曲げて、その外側突出端で夫々可動接点を形成し、この二つの可動接点により夫々の可動接点部４０ａ、４０ｂを構成している。この接点構成は、所謂ツイン接点構成であり、接触信頼性を高めている。
【００３２】
被固定部４１は回転ハンドル体２の固定部２２に可動接触ばね４を固定させるためのものである。つまり回転ハンドル体２側の固定部２２は回転軸体２０の内周面側に周方向に一定間隔を開けて形成したリブ２２ａ、２２ａと、このリブ２２ａ、２２ａ間に形成した突起２２ｂと、回転軸体２０の外周面側に一定間隔を開けて形成した嵌合溝２２ｃ、２２ｃとで形成されており、これに対応して被固定部４１は上記リブ２２ａ、２２ａ間に嵌合されるとともに中央に設けた係止孔４１ａに上記突起２２ｂが係止される突片４１ｂと、上記嵌合溝２２ｃ、２２ｃに嵌合される嵌合突片４１ｃ、４１ｃとから構成されている。
【００３３】
而して回転軸体２０の固定部２２の周壁を被固定部４１の嵌合突片４１ｃ、４１ｃと、突片４１ｂとで挟持することで、可動接触ばね４は回転ハンドル体２に装着固定される。このとき被固定部４１の両側の円弧状の腕片４２、４２は回転軸体２０の内周面に沿うように回転軸体２０内に収納される。
【００３４】
つるまきばねからなる復帰用ばね体３は、図４に示すように両端部３ａ、３ｂをほぼ同じコイル部位の側面から外方向に突出させており、このときコイル部位の端面から見たときに両端部３ａ、３ｂが僅かな角度で交差している。
【００３５】
カバー１Ｂはボディ１Ａの軸受け凹部１０及び窓孔１２の側面開口側を被蔽するようにボディ１Ａに被着されるもので、両側からはボディ１Ａの両側側面に沿って配置される固定片１３、１３を折り曲げ形成してある。この固定片１３、１３には、ボディ１Ａの側面形成した係止突起１４を係止する係止孔１５を夫々形成しており、この係止によってカバー１Ｂをボディ１Ａに固定する。
【００３６】
而して本実施形態のスイッチ装置を組立るに当たっては、まずボディ１Ａの軸受け凹部１０の円柱体１１に復帰用ばね体３のコイル部位を被挿する。この際復帰用ばね体３のコイル部位の端面が円柱体１１の基部周辺の段部からなる載置部１０ａに載置され、また両端部３ａ、３ｂ間に円弧状突起１６を介在させて両端部３ａ、３ｂを拡開させるとともにこれら両端部３ａ、３ｂを円弧状突起１６の両側面に弾接させる。
【００３７】
次に予め可動接触ばね４を装着している回転ハンドル体２の操作体２１を窓孔１２に嵌めてその先部をボディ１Ａの外部へ突出させるとともに、回転軸体２０を軸受け凹部１０に嵌め込む。このとき回転軸体２０の内周面に形成している係合突起２３を上記復帰用ばね体３の両端部３ａ、３ｂの先部間に介在させ、その先部を係合突起２３の両側面に弾接させる。
【００３８】
このとき、復帰用ばね体３の両端部３ａ、３ｂが対向方向に弾発力を発生させているため係合突起２３は両側面に均等な力が加わり、回転軸体２０は操作体２１が窓孔１２の中央に位置するように保持される。このとき可動接触ばね４の両端の可動接点部４０ａ、４０ｂは共通接点部７に接触した状態にある。
【００３９】
つまり操作体２１が中立位置にあって、スイッチ端子６ａ又は６ｂと共通端子８との間は非導通状態にある。
【００４０】
以上のように復帰用ばね体３、可動接触ばね４を装着した回転ハンドル２をボディ１Ａに組み込んだ後、カバー１Ｂをボディ１Ａに被着固定することで図５に示すスイッチ装置が完成することになる。
【００４１】
尚各端子６ａ、６ｂ、８は下面をボディ１Ａの底部と略同じ高さとすることで、プリント基板への表面実装を可能とし、また金メッキを施すとともに夫々の先端を立ち上がらせることで接触信頼性を高めるとともに半田付けが確実にできるようにしている。またボディ１Ａの裏面にはプリント基板への実装時の位置決め用突起１７を形成している。
【００４２】
次に本実施形態のスイッチ動作について簡単に説明する。
【００４３】
まず操作体２１に操作力を加えない状態では、操作体２１は中立位置にあって、スイッチとしては非導通状態にあるが、図６に示すように操作体２１に対して左方向に操作力を加えると、加えた方向が前側となる係合突起２３の側面が対応する復帰用ばね体３の端部３ｂを弾発力に抗して撓ませながら回転軸体２０は軸受け凹部１０内を回転することになる。このとき復帰用ばね体３の他方の端部３ａは円弧状突起１６に当接した状態にあるので復帰用ばね体３自体の回転は規制されることになり、そのため上記端部３ｂの移動により復帰用ばね体３には反移動方向（反回転方向）の弾発力が蓄積されることになる。
【００４４】
一方回転軸体２０の回転に可動接触ばね４も共動し、回転方向の前側となる可動接点部４０ａを固定接点部５ａ上に移動接触させるとともに、回転方向の後側となる可動接点部４０ｂを共通接点部７上に移動接触させる。これによりスイッチ端子６ａと共通端子８との間が可動接触ばね４を通じて導通する。
【００４５】
次に操作体２１に加えていた操作力を解除すると、復帰用ばね体３に蓄積されていた弾発力によって端部３ｂから係合突起２３の側面に先の回転方向とは逆の回転方向の力を加えることになる。これにより回転軸体２０は復帰方向に回転し、係合突起２３を押圧している復帰用ばね体３の端部３ｂも係合突起２３の移動とともに移動し、やがて円弧状突起２３の側面に当たることになる。これにより係合突起２３への押圧力が無くなって回転軸体２０の回転移動も止まる。この停止により操作体２１は窓孔１２の中央、つまり中立位置に戻ることになる。
【００４６】
このとき可動接触ばね４の可動接点部４０ａ、４０ｂが軸受け凹部１０の底部上に移動してスイッチ端子６ａと共通端子８との間を非導通とする。
【００４７】
尚操作体２１に上記とは反対方向の操作力を加えれば回転軸体２０の回転方向が反対となり、この回転軸体２０の回転に伴い可動接触ばね４の可動接点部４０ｂが固定接点部５ｂに、可動接点部４０ａが共通接点部７に接触し、スイッチ端子６ｂと共通端子８との間が導通する。そして操作力を解除すると、上述と同様にして復帰用ばね体３に蓄積された反回転方向の弾発力で回転軸体２０が復帰回転し、操作体２１が中立位置に戻ることになる。そして可動接触ばね４の可動接点部４０ａ、４０ｂが軸受け凹部１０の底部上に移動してスイッチ端子６ｂと共通端子８との間を非導通とする。
【００４８】
以上の本実施形態によれば可動接触ばね４を通じてスイッチ端子６ａと共通端子８との間又はスイッチ端子６ｂと共通端子８との間に形成される導通経路の距離が同じであるので、回転軸体２０の回転角度が同じであれば、回転方向によらず導通径路の電気抵抗は同じであり、そのため回転方向（操作方向）によってスイッチの出力特性が変わることはない。
【００４９】
（実施形態２）
上記実施形態１では可動接触ばね４は回転ハンドル体２の回転軸体２０に組み付けたものであったが、本実施形態は図７、図８に示すように可動接触ばね４を回転ハンドル体２の回転軸体２０の内周壁に形成した保持部２４に可動接触ばね４の中央部をインサート成形して回転軸体２０と一体化し、可動接触ばね４の組み付けなどの手間を省略化した点で実施形態１と相違する。
【００５０】
その他の構成、動作は基本的には実施形態１と同じであるので、同じ構成要素には同じ符号を付して説明は省略する。
【００５１】
（実施形態３）
上記実施形態１、２は復帰用の復帰用ばね体３と可動接触ばね４とを別部材で構成しているが、本実施形態は一つのつるまきばね９により復帰用の復帰用ばね体３と可動接触ばね４とを兼用させた点に特徴がある。
【００５２】
つまり本実施形態に用いるつるまきばね９は図９（ａ）〜（ｃ）に示すようにコイル部位を軸受け凹部１０の中央の円柱体１１に被挿して実施形態１、２と同様に復帰用ばね体３として使用し、両端部の内、軸受け凹部１０の底部側となる一端部を横方向に突出した横片部３０ａとこの横片部３０ａの先端からＶ字状に折り曲げて軸受け凹部１０の底部方向に斜めに延長した延長片部３０ｂとで構成し、延長片部３０ｂの先端部を略Ｕ字状に折り曲げてその外側Ｒ面で、軸受け凹部１０の底部及び固定接点部２２ａ及び共通接点部７に接触する可動接点部４０ａを形成している。
【００５３】
一方他端部を、上記一端部の横片部３０ａを突出させたコイル部の側面部側から上記横片部３０ａに対して一定角度開くように横方向に突出させた横片部３１ａと、この横片部３１ａの先端からコイル部の側面と並行するように垂下させた垂下片部３１ｂと、この垂下片３１ｂの先端からコイル部端面から見て延長片部３０ｂと線対称的に折り曲げて軸受け凹部１０の底部方向に斜めに延長した延長片部３１ｃとで構成し、延長片部３１ｃの先端部を略Ｕ字状に折り曲げてその外側Ｒ面で、軸受け凹部１０の底部及び固定接点部２２ｂ及び共通接点部７に接触する可動接点部４０ｂを形成している。
【００５４】
而して本実施形態の場合には図１０（ａ）に示すように軸受け凹部１０の円柱体１１につるまきばね９のコイル部位からなる復帰用ばね体３を被挿するとともに、つるまきばね９の一端部の横片部３０ａ、３１ａを弾発力に抗して拡開した状態で円弧状突起１６及び係合突起２３の側面に弾接させる。この状態では実施形態１で説明した場合と同様に復帰用ばね体３の両端部の弾発力で、操作体２１の位置を窓孔１２の中間位置、つまり中立位置に留まるように回転ハンドル体２を保持している。このとき各可動接点部４０ａ、４０ｂは軸受け凹部１０の底部に露出している共通接点部７に接触している状態にある。尚軸受け凹部１０の開口側には図１０（ｂ）に示すように金属製のカバー１Ｂが被着されることで完成したスイッチ装置となる。尚本実施形態では円弧状突起１６の位置及び係合突起２３の位置は操作体２１の突出位置とは反対側としている。
【００５５】
さて、操作体２１に操作力を、例えば図１１（ａ）に示すように左方向に加えると、回転ハンドル体２は左回転し、係合突起２３の回転方向の前方となる端面でつるまきばね９の一端部側を押し動かしてその延長片部３０ｂの先端の可動接点部４０ａを軸受け凹部１０の底部に露出している固定接点部５ａ上に移動させる。一方つるまきばね９の他端部側は円弧状突起１６で動きが規制されているため、延長片部３１ｃは移動せず、共通接点部７に接触したままである。これによりつるまきばね９が可動接触ばねとして機能し、図１１（ｂ）に示すように共通端子８とスイッチ端子６ａとの間を導通させる。
【００５６】
次に操作力が解除されると、上記コイル部からなる復帰用ばね体３で蓄積した反回転方向の弾発力により一端部の横片部３０ａが当接している係合突起２３の側面を押圧して回転軸体２０に右方向に回転させる。これにより延長片部３０ｂも移動して可動接点部４０ａを固定接点部５ａから共通接点部７上に移動させる。
【００５７】
つるまきばね９の一端部の横片部３０ａが円弧状突起１６に当接することで、回転軸体２０の回転が規制され回転ハンドル体２は操作体２１を中立位置に位置させる元の位置に戻ることになる。
【００５８】
尚操作力を図において右方向に与えれば、つるまきばね９の他端部の延長片部３１ｃが移動してその先端の可動接点部４０ｂが固定接点部５ｂに接触し、共通端子８とスイッチ端子６ｂとの間を導通させることになる。
【００５９】
以上のように構成した本実施形態は、可動接触ばね４及び復帰用ばね体３を一つのつるまきばね９で構成することで部品点数の削減を図れる。またスイッチ端子６ａと共通端子８との間の導通経路と、スイッチ端子６ｂと共通端子８との間の導通経路はつるまきばね９を介することになるので、回転軸体２０の回転角度が同じであれば、回転方向によらず導通径路の電気抵抗は同じであり、そのため回転方向（操作方向）によってスイッチの出力特性が変わることはない。
【００６０】
（実施形態４）
本実施形態も実施形態３と同様につるまきばねで復帰用ばね体３と可動接触ばね４とを兼用させたものであるが、本実施形態では、コイル部からなる復帰用ばね体３を図１２（ａ）、（ｂ）に示すように円柱体１１に被挿したときに下端面が、円柱体１１の基部周囲の軸受け凹部１０の底部に露出している共通接点部７上に載置されることで電気的に接続する構成としている。
【００６１】
本実施形態に用いるつるまきばね９は図１３（ａ）〜（ｃ）に示すようにコイル部位を軸受け凹部１０の中央の円柱体１１に被挿して実施形態１、２と同様に復帰用ばね体３として使用し、両端部の内、軸受け凹部１０の反底部側となる一端部３００ａの先端から斜めに延長した延長片部３０１ａの先部をへ字状に形成してその外側凸面で、軸受け凹部１０の底部及び固定接点部２２ａに接触させる可動接点部４０ａを形成している。
【００６２】
一方軸受け凹部１０の底部側となる他端部３００ｂの先端から斜めに下方に延長した延長片部３０１ｂの先部をへ字状に形成してその外側凸面で、軸受け凹部１０の底部及び固定接点部２２ｂに接触させる可動接点部４０ｂを形成している。
【００６３】
そして回転ハンドル体２の係合突起２３の位置と、軸受け凹部１０の底部から立設させる円弧状突起１６の位置は操作体２１側の位置としている。
【００６４】
尚その他の構成、動作は上述の各実施形態に準ずるものであるので説明は省略し、同じ構成には同じ符号を付す。
【００６５】
而して回転ハンドル体２をボディ１Ａの軸受け凹部１０内に嵌め込み、つるまきばね９を円柱体１１に被挿し、つるまきばね９の両端部３００ａ、３００ｂを円弧状突起１６及び係合突起２３で拡開してそれらの両側面に弾接している状態にあるとき、つまり操作体２１が中立位置にあるときには、両端部の延長片部３０１ａ、３０１ｂの先端の可動接点４０ａ、４０ｂは、図１２（ａ）、（ｂ）に示すように軸受け凹部１０の底部上に位置している。
【００６６】
この状態で操作体２１に左方向（又は右方向）の操作力が加えられ、回転ハンドル体２が図１４（ａ）に示すように左方向（又は右方向）に一定角度以上回転すると、係合突起２３の側面で押し動かされる延長片部３０１ａ（又は３０１ｂ）の先部の可動接点部４０ａ（又は４０ｂ）が軸受け凹部１０の底部に露出している固定接点部５ａ（又は５ｂ）上に移動して図１４（ｂ）に示すように接触することで、スイッチ端子６ａ（又は６ｂ）と、共通端子８との間がつるまきばね９を通じて導通するようになっている。
【００６７】
尚本実施形態では、係合突起２３の位置と、円弧状突起１６の位置は操作体２１側の位置としている。またその他の構成、動作は実施形態３に準ずるものであるので説明は省略する。
【００６８】
以上のように構成した本実施形態は、部品点数の削減が図れる。
【００６９】
（実施形態５）
上記実施形態１〜４の何れもが復帰用ばね体３としてつるまきばねを用いているが、本実施形態は可動接触ばね４と復帰用ばね体３を板ばねにより一体に形成した点に特徴がある。
【００７０】
つまり、図１５（ａ）の平面図、同図（ｂ）のＡ−Ａ方向断面矢視図、同図（ｃ）のＢ−Ｂ方向矢視図で示すように、復帰用ばね体３は、板ばねを用いて板面が軸方向に並行するように略環状に曲げ形成されたもので、その両端からハの字状に拡開させた端部３ａ’、３ｂ’を突出させ、その端部３ａ’、３ｂ’の下端（軸受け凹部１０側）から対称的に復帰用ばね体３の周部に沿うように腕片４２’、４２’を延長させ、これら腕片４２’、４２’の先部に並行する一対の接触片４３’、４３’を形成し、これら腕片４２’、４２’、接触片４３’、４３’で可動接触ばね４を構成している。そして各接触片４３’、４３’の先端をＶ字状に折り曲げて、その外側突出部で可動接点を形成し、その両接触片４３’、４３’の可動接点により可動接点部４０ａ又は４０ｂを構成している。
【００７１】
また回転ハンドル体２の係合突起２３の位置と、ボディ１Ａの軸受け凹部１０の底部から立設させる円弧状突起１６の位置は図１６（ａ）に示すように操作体２１側とは反対側の位置とし、円弧状突起１６は図１６（ａ）（ｂ）に示すように背面を円柱体１１の側面と一体となるように沿わせる形で軸受け凹部１０の底部より立設している。
【００７２】
ボディ１Ａの軸受け凹部１０に露出させる固定接点部５ａ、５ｂ及び共通接点部７の構成は実施形態１に準ずる構成であるので説明は省略する。またその他の構成で上記実施形態と同じ機能を持つ構成要素には同じ符号を付して説明は省略する。
【００７３】
而して本実施形態では、まずボディ１Ａの軸受け凹部１０の中央の円柱体１１に略環状の復帰用ばね体３を被挿する。この際また両端部３ａ’、３ｂ’間に円弧状突起１６を介在させて両端部３ａ’、３ｂ’を拡開させるとともにこれら両端部３ａ’、３ｂ’を円弧状突起１６の両側面に弾接させる。このとき復帰用ばね体３の端部が円柱体１１の基部の軸受け凹部１０の底部上方に配置される。また軸受け凹部１０に先に嵌め込まれている回転ハンドル体２の回転軸体２０の係合突起２３を上記復帰用ばね体３の両端部３ａ、３ｂの先部間に介在させ、その先部を係合突起２３の両側面に弾接させる。
【００７４】
このとき、復帰用ばね体３の両端部３ａ’、３ｂ’が対向方向に弾発力を発生させているため係合突起２３は両側面に均等な力が加わり、回転軸体２０は操作体２１が窓孔１２の中央位置にくる位置に保持される。
【００７５】
またこのとき可動接触ばね４は両端の可動接点部４０ａ、４０ｂが共通接点部７上に接触した状態にある。
【００７６】
この状態で操作体２１に左方向（又は右方向）の操作力が加えられ、回転軸体２０が図１７（ａ）に示すように左方向（又は右方向）に一定角度以上回転すると、係合突起２３の側面で押し動かされる端部３ａ’（又は３ｂ’）側の先部の可動接点部４０ａ（又は４０ｂ）が軸受け凹部１０の底部に露出している固定接点部５ａ（又は５ｂ）上に移動し、また可動接点部４０ｂ（又は４０ａ）が共通接点部７上に移動して図１７（ｂ）に示すように接触し、可動接触ばね４、復帰用ばね体３を通じてスイッチ端子６ａ（又は６ｂ）と共通端子８との間が導通することになる。
【００７７】
そして操作力が解除されると、上記の端部３ａ’（又は３ｂ’）を押し動かしたときに蓄えられた弾発力により係合突起２３の側面が端部３ａ’（又は３ｂ’）により押圧され、端部３ａ’が円弧状突起１６の側面に当接して回転が規制される位置まで回転軸体２０は回転し、これにより回転ハンドル体２は元の位置に復帰して操作体２１を中立位置に戻す。またこのとき両可動接点部４０ａ、４０ｂは共に共通接点部７上に位置するため、スイッチ端子６ａ（又は６ｂ）と共通端子８との間は非導通となる。
【００７８】
以上のように構成した本実施形態は、可動接触ばね４及び復帰用ばね体３を一つの板ばねで構成することで部品点数の削減を図れる。またスイッチ端子６ａと共通端子８との間の導通経路と、スイッチ端子６ｂと共通端子８との間の導通経路は可動接触ばね４及び復帰用ばね体３からなる経路を介することになるので、回転軸体２０の回転角度が同じであれば、回転方向によらず導通径路の電気抵抗は同じであり、そのため回転方向（操作方向）によってスイッチの出力特性が変わることはない。
【００７９】
【発明の効果】
請求項１の発明は、回転ハンドル体の操作体を外部へ突出させる窓孔が回転軸体の外周面で閉鎖された状態にあるため、特別な防塵構成を用いることなく、外部から装置本体内への塵埃の侵入を防止でき、しかも可動接触ばねや復帰用ばね体を回転ハンドル体の回転軸体内に収納されることで、スペースの有効利用によりスイッチ装置の小型化が容易となる。
【００８０】
請求項２の発明は、操作体の中立位置が復帰用ばね体の左右方向の復帰力の影響を受けることなく定位置に定まり、しかも略環状のばね体によるため左右方向の復帰力のばらつきがなく、特別なばね調整を行う必要もない。
【００８１】
請求項３の発明は、何れの固定接点部への接触時においても、スイッチ端子と共通端子との間の導電経路の長さが同じとなり、切り替えの抵抗差が生じず、そのためばらつきのないスイッチ出力が得られる。
【００８２】
請求項４の発明は、可動接触ばねと復帰用ばね体を一つのつるまきばねで兼用できるため、部品数を削減できてコストダウンが図れる。
【００８３】
請求項５の発明は、可動接触ばねと復帰用ばね体を一つのつるまきばねで兼用できるため、部品数を削減できてコストダウンが図れる上に、何れの固定接点部への接触時においても、スイッチ端子と共通端子との間の導電経路の長さが同じとなり、切り替えの抵抗差が生じず、そのためばらつきのないスイッチ出力が得られる。
【００８４】
請求項６の発明は、可動接触ばねと復帰用ばね体を板ばねで一体形成できるため、部品数を削減できてコストダウンが図れる上に、何れの固定接点部への接触時においても、スイッチ端子と共通端子との間の導電経路の長さが同じとなり、切り替えの抵抗差が生じず、そのためばらつきのないスイッチ出力が得られる。
【図面の簡単な説明】
【図１】図１は実施形態１の分解斜視図である。
【図２】（ａ）は同上のカバーを外した状態の側面図である。
（ｂ）は同上（ａ）のカバーを取り付けた状態のＡ−Ａ断面図である。
（ｃ）は同上（ａ）のカバーを取り付けた状態のＢ−Ｂ断面図である。
【図３】同上の可動接触ばねの平面図である。
【図４】同上の復帰用ばね体の平面図である。
【図５】同上の全体斜視図である。
【図６】同上の動作説明図である。
【図７】（ａ）は実施形態２のカバーを外した状態の側面図である。
（ｂ）は同上（ａ）のカバーを取り付けた状態のＡ−Ａ断面図である。
（ｃ）は同上（ａ）のカバーを取り付けた状態のＢ−Ｂ断面図である。
【図８】同上の回転ハンドルの平面図である。
【図９】（ａ）は実施形態３に用いるつるまきばねの平面図である。
（ｂ）は同上（ａ）の一側面図である。
（ｃ）は同上（ａ）の他側面図である。
【図１０】（ａ）は同上のカバーを外した状態の側面図である。
（ｂ）は同上（ａ）のカバーを取り付けた状態のＡ−Ａ断面図である。
【図１１】（ａ）は同上の動作説明用であってカバーを外した状態の側面図である。
（ｂ）は同上（ａ）のカバーを取り付けた状態のＢ−Ｂ断面図である。
【図１２】（ａ）は実施形態４のカバーを外した状態の側面図である。
（ｂ）は同上（ａ）のカバーを取り付けた状態のＡ−Ａ断面図である。
【図１３】（ａ）は同上に用いるつるまきばねの平面図である。
（ｂ）は同上（ａ）の一側面図である。
（ｃ）は同上（ａ）の他側面図である。
【図１４】（ａ）は同上の動作説明用であってカバーを外した状態の側面図である。
（ｂ）は同上（ａ）のカバーを取り付けた状態のＢ−Ｂ断面図である。
【図１５】（ａ）は実施形態５に用いる復帰用ばね体及び可動接触ばねの平面図である。
（ｂ）は同上（ａ）のＡ−Ａ断面図である。
（ｃ）は同上（ａ）のＢ−Ｂ方向矢視図である。
【図１６】（ａ）は同上のカバーを外した状態の側面図である。
（ｂ）は同上（ａ）のカバーを取り付けた状態のＡ−Ａ断面図である。
【図１７】（ａ）は同上の動作説明用であってカバーを外した状態の側面図である。
（ｂ）は同上（ａ）のカバーを取り付けた状態のＢ−Ｂ断面図である。
【符号の説明】
１装置本体
１Ａボディ
１Ｂカバー
１０軸受け凹部
１１円柱体
１２窓孔
２回転ハンドル体
２０回転軸体
２１操作体
３復帰用ばね体
４可動接触ばね
６ａ、６ｂスイッチ端子
８共通端子[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a switch device of a switching type with a neutral point.
[0002]
[Prior art]
Conventionally, as a switch device of this type, an operating body whose lower end is pivotally supported, and one of cams disposed on both left and right sides of the operating body are pushed and driven in accordance with the rotation direction of the operating body, and the cam is turned on. The movable contact spring made of a leaf spring is bent by driving, and the movable contact portion provided at the end is moved to contact the fixed contact portion in accordance with the bending, and the movable contact spring is released when the rotational operating force of the operating body is released. There has been provided an apparatus in which an operating body is returned to an original position by a return force of the above-mentioned method (Patent Document 1).
[0003]
[Patent Document 1]
JP-A-2002-150885
[0004]
[Problems to be solved by the invention]
In the above-mentioned conventional example, since the cams are arranged on both sides of the operating body, it is difficult to reliably prevent dust from entering the body through a window for exposing the operating body to the outside.
[0005]
In addition, the storage space for the movable contact spring must be provided separately from the storage space for the mechanism section such as the cam, which limits the miniaturization of the apparatus body.
[0006]
Further, the movable contact spring of the conventional example is formed by extending a portion bent in an inverted U-shape at both ends of a central portion and forming a movable contact portion at an extended end thereof. There was a risk that the force for moving the operating tool from the position would vary in the left-right direction.
[0007]
SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object of the present invention is to provide a switch which can prevent dust from entering the inside of the apparatus without using a special dustproof structure, and which can be downsized. It is to provide a device.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, a rotary handle body including an annular rotary shaft and an operating body protruding from an outer peripheral surface of the rotary shaft is housed. A bearing recess that rotatably guides the outer peripheral surface of the rotary shaft on the inner peripheral surface, and a columnar body that is erected from the bottom of the substantially central portion of the bearing concave and is disposed at the center of the rotary shaft. And a window hole formed on the peripheral wall of the bearing recess, from the bearing recess to the outside, and through which the operating body is movably inserted between both ends in the circumferential direction, and a center of the operating body. At a position symmetrical with respect to a line connecting the center of the rotating shaft body and freely movable circumferentially on the bottom of the bearing recess between the inner circumferential surface of the rotating shaft body and the outer circumferential surface of the cylindrical body. And are provided corresponding to the rotation direction of the rotating shaft body, A movable contact spring that moves a pair of movable contact portions that cooperate in the circumferential direction of the bearing recess in accordance with the rotation direction of the rotating shaft, and a line that connects the center of the operating body and the center of the rotating shaft. Symmetrically, a pair of fixed contacts provided at the bottom of the bearing recess and in contact with the movable contact portion of one of the movable contact springs cooperating with the rotation of the rotary shaft in conjunction with the operation and movement direction of the operating body. Portion, while being inserted into the columnar body, the movement of one end is restricted during rotation of the rotary shaft accompanying the operation movement of the operating body, and the other end is engaged with the rotary shaft. A substantially annular spring that accumulates a repulsive force in the anti-rotation direction by being pushed in the rotational direction, and returns and rotates the rotary shaft body with the resilient force when the operating force of the operating body is released. And a body which is electrically connected to the fixed contact portion, respectively. Characterized the second switch terminal, said movable contact spring and a common terminal electrically connected.
[0009]
According to the first aspect of the present invention, since the window for projecting the operating body of the rotary handle body to the outside is closed by the outer peripheral surface of the rotary shaft body, the apparatus can be externally provided without using a special dustproof structure. Dust can be prevented from entering the main body, and the movable contact spring and the return spring are housed in the rotary shaft of the rotary handle, so that the size of the switch device can be easily reduced by effectively utilizing the space.
[0010]
According to a second aspect of the present invention, in the first aspect of the present invention, the spring body has one end and the other end protruding outward from substantially the same side position, and the one end and the other end are formed on both sides. An arc-shaped projection that abuts these ends against a resilient force and expands at a fixed angle when viewed from the center is projected to the bottom of the bearing recess, and a center that divides the arc-shaped projection into two parts left and right. A line is set on a line connecting the center of the operating body and the center of the rotating shaft body, and when viewed from the center of the rotating shaft body, the both sides having the same opening angle as the opening angle of both sides of the arc-shaped projection. An engaging projection having a center line that is divided into two parts on the line connecting the center of the operating body and the center of the rotary shaft is provided on the inner peripheral surface of the bearing recess, and the operating body is When at the center of the movement range, one end and the other end of the return spring body are When the operating body is moved, the corresponding end of the spring body is pushed and moved by the side surface of the engaging projection which is on the front side in the moving direction when the operating body is moved. By regulating the movement of the other end on the side surface of the arc-shaped projection on the rear side, a resilient force in the anti-rotational direction is accumulated in the return spring.
[0011]
According to the second aspect of the present invention, the neutral position of the operating body is fixed at a fixed position without being affected by the left-right return force of the return spring body. There is no variation and no special spring adjustment is required.
[0012]
According to a third aspect of the present invention, in the second aspect of the present invention, in the return spring body, both ends of a coil portion inserted into the columnar body and projecting outward from a side surface of the coil portion are attached to the operating body. Is formed at the center position of the movement range by a helical spring that resiliently contacts both side surfaces of the arc-shaped projection and the engagement projection, and the movable contact spring is provided between the center of the operating body and the rotating shaft body. A central portion is fixed by a portion of the rotary shaft opposite to the projecting position of the operating body on a line connecting the center, and symmetrically in the left-right direction from the center along the circumferential direction of the rotary shaft. The extended arm piece is formed by an arc-shaped leaf spring having a movable contact portion provided at the front end thereof, and the bearing recess is provided between the position where the pair of fixed contact portions is provided and below the movable contact spring. At the part located at the common terminal electrically connected to the common terminal A point portion is provided, and one of the movable contact portions of the movable contact spring is in contact with the fixed contact portion when the rotary shaft body rotates, and the other movable contact portion is brought into contact with the common contact. .
[0013]
According to the third aspect of the present invention, the length of the conductive path between the switch terminal and the common terminal is the same at the time of contact with any of the fixed contact portions, and there is no difference in switching resistance. No switch output is obtained.
[0014]
According to a fourth aspect of the present invention, in the second aspect of the present invention, the return spring body is configured such that both ends of a coil portion inserted into the columnar body and projecting outward from a side surface of the coil portion are connected to the operating body. Is formed at a center position of the movement range, is formed by a helix spring elastically contacting both side surfaces of the arc-shaped projection and the engagement projection, and the movable contact spring is formed by the helix spring, A movable contact portion is formed at a tip of an extension portion formed to extend from the portion, and the bearing recess is electrically connected to the common terminal at a peripheral portion of a base of the cylinder, and is inserted into the cylinder. A common contact portion electrically connected to the helical spring is formed by placing an end of the coil portion of the helical spring.
[0015]
According to the fourth aspect of the present invention, the movable contact spring and the return spring can be shared by a single helical spring, so that the number of parts can be reduced and the cost can be reduced.
[0016]
According to a fifth aspect of the present invention, in the second aspect of the present invention, the return spring body includes a coil body inserted into the columnar body, and both ends of the coil body projecting outward from a side surface of the coil body. Is formed at a center position of the movement range, is formed by a helix spring elastically contacting both side surfaces of the arc-shaped projection and the engagement projection, and the movable contact spring is formed by the helix spring, A movable contact portion is formed at the tip of an extended portion formed to extend from the portion, and the bearing concave portion is common to a portion located between the position where the pair of fixed contact portions is provided and below the movable contact spring. A common contact portion electrically connected to the terminal is provided, and one of the movable contact portions of the movable contact spring is in contact with the fixed contact portion during rotation of the rotary shaft body, and the other movable contact portion is shared. It is characterized by being brought into contact with a contact.
[0017]
According to the fifth aspect of the present invention, since the movable contact spring and the return spring body can be shared by a single helical spring, the number of parts can be reduced and cost can be reduced. In this case, the length of the conductive path between the switch terminal and the common terminal is the same, and no difference in switching resistance occurs, so that a switch output with no variation can be obtained.
[0018]
In the invention of claim 6, the return spring body has a substantially annular portion formed by bending a plate surface so as to be parallel to the axial direction, is inserted into the cylindrical body, and both ends of the annular portion project outward. The portion is formed by a leaf spring elastically contacting both side surfaces of the arc-shaped projection and the engagement projection in a state where the operating body is at the center position of the movement range, and the movable contact spring is formed by the leaf spring. A movable contact portion is formed at the tip of an arm piece formed symmetrically extending in the left-right direction from the both end portions along the inner peripheral surface of the rotating shaft body, and the bearing recess is formed by the pair of fixed contacts. A common contact portion electrically connected to a common terminal is provided between the positions where the portions are provided and below the movable contact spring, and one of the movable contact springs is movable when the rotary shaft body rotates. While the contact part is in contact with the fixed contact part, the other movable contact And wherein the contacting parts in common contact.
[0019]
According to the invention of claim 6, since the movable contact spring and the return spring body can be integrally formed by a leaf spring, the number of parts can be reduced, cost can be reduced, and even when any fixed contact portion is contacted. Since the length of the conductive path between the switch terminal and the common terminal is the same, there is no difference in switching resistance, and a switch output with no variation can be obtained.
[0020]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described with reference to embodiments.
[0021]
(Embodiment 1)
This embodiment will be described with reference to FIGS.
[0022]
In the present embodiment, the constituent members include an apparatus main body 1 including a body 1A made of a synthetic resin molded product, a metal cover 1B covering an opening side surface of the body 1A, a rotating handle body 2, and a helix spring. A return spring body 3, a movable contact spring 4 made of a leaf spring, and a common terminal 8 having switch terminals 6a, 6b having fixed contact portions 5a, 5b embedded in the body 1A and a common contact portion 7. Be composed.
[0023]
The rotating handle body 2 includes an annular rotating shaft body 20, an operating body 21 integrally projecting from an outer surface of a peripheral wall of the rotating shaft body 20, and a peripheral wall opposite to the projecting position of the operating body 21 across the center. It comprises a fixed portion 22 of the movable contact spring 4 provided on the portion, and an engagement protrusion 23 described later protruding on the inner peripheral surface side of the peripheral wall portion from which the operating body 21 protrudes.
[0024]
The body 1A has a bearing recess 10 having a central portion provided with an inner peripheral surface for guiding the outer peripheral surface of the rotating shaft body 20 of the rotating handle body 2 in the circumferential direction, and is integrally and concentrically protruded from the center of the bottom of the bearing recess 10. A cylindrical body 11, a window hole 12 formed in the outer peripheral wall of the bearing recess 10, and for projecting the operating body 21 of the rotary handle body 2 to the outside, and concentric with the center of the bearing recess 10 from the bottom of the bearing recess 10. And an arc-shaped projection 16 which is projected.
[0025]
The window hole 12 is formed such that the circumferential direction of the bearing recess 10 is long so that the operating body 21 of the rotary handle body 2 can be operated to rotate the rotating shaft body 20 at a predetermined rotation angle in the circumferential direction of the bearing recess 10. It has become.
[0026]
The arc-shaped projection 16 has a fixed length to the left and right about a line passing through the center of the window hole 12 and the center of the bearing recess 10, and projects from the bottom of the bearing recess 10 slightly away from the columnar body 11. ing.
[0027]
The angle seen from the center with respect to the arc-shaped projection 16 and the angle seen from the center with respect to the engaging projection 23 formed on the rotary handle body 2 are set to the same angle. In addition, when the rotation shaft body 20 of the rotation handle body 2 is rotatably fitted in the bearing recess 10 in the circumferential direction and the center line of the operation body 21 and the center position of the window hole 12 are combined, the engagement protrusion 23, Each thickness dimension is set so that the arc-shaped projection 16 is opposed to the arc-shaped projection 16 with a minute gap therebetween.
[0028]
The fixed contact portions 5a and 5b are exposed line-symmetrically at the bottoms of the bearing recesses 10 on both sides of the arc-shaped projection 16. The contact surfaces of the fixed contact portions 5a and 5b are at the same height as the bottom of the bearing recess 10. These fixed contact portions 5a, 5b are provided on conductive plates 50a, 50a embedded in the body 1A by insert molding, and the conductive plates 50a, 50b protrude outside from both side surfaces of the body 1A. 6a and 6b are also provided integrally.
[0029]
On the other hand, the common contact portion 7 is exposed at the bottom of the bearing recess 10 between the ends of the fixed contact portions 5a and 5b remote from the arc-shaped projection 16. The common contact portion 7 is provided on a conductive plate 50c embedded in the body 1A by insert molding. The contact surface has the same height as the bottom of the bearing recess 10 and is fixed to face the end of the common contact portion 7. The bottom of the bearing recess 10 is interposed between the end of the contact 5a and the end of the fixed contact 5b. The conductive plate 50c is provided integrally with common terminals 8, 8 protruding from both side surfaces of the body 1A.
[0030]
The movable contact spring 4 is formed by punching a leaf spring in an arc shape as shown in FIG. 3, and has a fixed portion 41 for fixing to the rotating handle body 2 at the center portion. On both sides, arc-shaped arm pieces 42, 42 each having a movable contact portion 40a, 40b formed of two movable contacts at the tip are formed line-symmetrically.
[0031]
The arm piece 42 is provided with a pair of contact pieces 43, 43 formed in parallel at the front end, and the tips of these contact pieces 43, 43 are bent into a V-shape to form movable contacts at their outer protruding ends. The two movable contacts constitute the respective movable contact portions 40a and 40b. This contact configuration is a so-called twin contact configuration and enhances contact reliability.
[0032]
The fixed portion 41 is for fixing the movable contact spring 4 to the fixing portion 22 of the rotary handle body 2. That is, the fixed portion 22 on the side of the rotating handle body 2 includes ribs 22a, 22a formed at regular intervals in the circumferential direction on the inner peripheral surface side of the rotating shaft body 20, and projections 22b formed between the ribs 22a, 22a. It is formed by fitting grooves 22c, 22c formed at regular intervals on the outer peripheral surface side of the rotating shaft body 20, and the fixed portion 41 is fitted between the ribs 22a, 22a correspondingly. A projection 41b is provided in which the projection 22b is locked in a locking hole 41a provided in the center, and fitting projections 41c, 41c are fitted in the fitting grooves 22c, 22c.
[0033]
Thus, the movable contact spring 4 is mounted and fixed to the rotating handle body 2 by sandwiching the peripheral wall of the fixed portion 22 of the rotating shaft body 20 between the fitting protrusions 41c, 41c of the fixed portion 41 and the protrusion 41b. Is done. At this time, the arc-shaped arm pieces 42 on both sides of the fixed portion 41 are housed in the rotary shaft 20 along the inner peripheral surface of the rotary shaft 20.
[0034]
As shown in FIG. 4, the return spring body 3 composed of a helical spring has both ends 3a and 3b projecting outwardly from the side surfaces of substantially the same coil portion, and when viewed from the end surface of the coil portion, Both ends 3a, 3b intersect at a slight angle.
[0035]
The cover 1B is attached to the body 1A so as to cover the bearing recess 10 and the side opening side of the window hole 12 of the body 1A, and fixed pieces 13 arranged along both side surfaces of the body 1A from both sides. , 13 are formed by bending. The fixing pieces 13 and 13 are formed with locking holes 15 for locking the locking projections 14 formed on the side surfaces of the body 1A, and the locking fixes the cover 1B to the body 1A.
[0036]
In assembling the switch device of the present embodiment, first, the coil portion of the return spring 3 is inserted into the cylindrical body 11 of the bearing recess 10 of the body 1A. At this time, the end face of the coil portion of the return spring body 3 is mounted on the mounting portion 10a composed of a step around the base of the cylindrical body 11, and the arc-shaped projection 16 is interposed between both end portions 3a and 3b. The portions 3a and 3b are expanded, and both ends 3a and 3b are elastically contacted with both side surfaces of the arc-shaped projection 16.
[0037]
Next, the operating body 21 of the rotary handle body 2 on which the movable contact spring 4 is mounted in advance is fitted into the window hole 12 so that its tip projects outside the body 1A, and the rotary shaft body 20 is fitted into the bearing recess 10. Put in. At this time, the engaging projections 23 formed on the inner peripheral surface of the rotating shaft body 20 are interposed between the leading ends of both ends 3a and 3b of the return spring body 3, and the leading ends are on both sides of the engaging projections 23. Make contact with the surface.
[0038]
At this time, since both ends 3a and 3b of the return spring body 3 generate a resilient force in the facing direction, the engaging projections 23 apply uniform forces to both side surfaces, and the rotating shaft body 20 is moved by the operating body 21. It is held so as to be located at the center of the window hole 12. At this time, the movable contact portions 40a and 40b at both ends of the movable contact spring 4 are in contact with the common contact portion 7.
[0039]
That is, the operating body 21 is in the neutral position, and the switch terminal 6a or 6b and the common terminal 8 are in a non-conductive state.
[0040]
After the rotary handle 2 on which the return spring body 3 and the movable contact spring 4 are mounted is assembled into the body 1A as described above, the cover 1B is attached and fixed to the body 1A to complete the switch device shown in FIG. become.
[0041]
Each of the terminals 6a, 6b, 8 has a lower surface that is approximately the same height as the bottom of the body 1A, thereby enabling surface mounting on a printed circuit board. And ensure soldering. On the back surface of the body 1A, there are formed positioning projections 17 for mounting on a printed circuit board.
[0042]
Next, the switch operation of the present embodiment will be briefly described.
[0043]
First, when no operating force is applied to the operating body 21, the operating body 21 is in the neutral position and is in a non-conductive state as a switch. However, as shown in FIG. Is added, the rotating shaft 20 moves inside the bearing recess 10 while the side of the engaging protrusion 23 whose front direction is the applied direction bends the corresponding end 3b of the return spring 3 against the elastic force. Will rotate. At this time, since the other end 3a of the return spring 3 is in contact with the arc-shaped projection 16, the rotation of the return spring 3 itself is restricted, and therefore, the movement of the end 3b The return spring 3 accumulates a repulsive force in the anti-movement direction (anti-rotation direction).
[0044]
On the other hand, the movable contact spring 4 cooperates with the rotation of the rotary shaft body 20 to move and contact the movable contact portion 40a on the front side in the rotation direction onto the fixed contact portion 5a, and the movable contact portion 40b on the rear side in the rotation direction. On the common contact 7. As a result, electrical continuity is established between the switch terminal 6a and the common terminal 8 through the movable contact spring 4.
[0045]
Next, when the operation force applied to the operation body 21 is released, the resilient force accumulated in the return spring body 3 causes the end portion 3b to move to the side surface of the engagement protrusion 23 in the rotation direction opposite to the previous rotation direction. Of force. As a result, the rotating shaft body 20 rotates in the return direction, and the end 3b of the return spring body 3 pressing the engagement projection 23 also moves with the movement of the engagement projection 23, and eventually strikes the side surface of the arc-shaped projection 23. Will be. As a result, there is no pressing force on the engagement projection 23, and the rotational movement of the rotary shaft 20 is stopped. With this stop, the operating body 21 returns to the center of the window hole 12, that is, the neutral position.
[0046]
At this time, the movable contact portions 40a and 40b of the movable contact spring 4 move onto the bottom of the bearing recess 10 to make the switch terminal 6a and the common terminal 8 non-conductive.
[0047]
If an operating force in the opposite direction is applied to the operating body 21, the rotation direction of the rotating shaft body 20 is reversed, and with the rotation of the rotating shaft body 20, the movable contact portion 40b of the movable contact spring 4 becomes the fixed contact portion 5b. Then, the movable contact portion 40a comes into contact with the common contact portion 7, and conduction between the switch terminal 6b and the common terminal 8 is established. Then, when the operating force is released, the rotating shaft body 20 is returned and rotated by the anti-rotational elastic force accumulated in the returning spring body 3 in the same manner as described above, and the operating body 21 returns to the neutral position. Then, the movable contact portions 40a and 40b of the movable contact spring 4 move onto the bottom of the bearing recess 10 to make the switch terminal 6b and the common terminal 8 non-conductive.
[0048]
According to the present embodiment described above, the distance of the conduction path formed between the switch terminal 6a and the common terminal 8 or between the switch terminal 6b and the common terminal 8 through the movable contact spring 4 is the same. If the rotation angle of the body 20 is the same, the electrical resistance of the conduction path is the same regardless of the rotation direction, so that the output characteristics of the switch do not change depending on the rotation direction (operation direction).
[0049]
(Embodiment 2)
In the first embodiment, the movable contact spring 4 is assembled to the rotary shaft body 20 of the rotary handle body 2. However, in the present embodiment, the movable contact spring 4 is connected to the rotary handle body 2 as shown in FIGS. The center portion of the movable contact spring 4 is insert-molded into the holding portion 24 formed on the inner peripheral wall of the rotating shaft body 20 to be integrated with the rotating shaft body 20, and the trouble of assembling the movable contact spring 4 is eliminated. This is different from the first embodiment.
[0050]
Other configurations and operations are basically the same as those of the first embodiment. Therefore, the same components are denoted by the same reference numerals and description thereof will be omitted.
[0051]
(Embodiment 3)
In the first and second embodiments, the return spring body 3 for return and the movable contact spring 4 are formed as separate members. However, in this embodiment, the return spring body 3 for return is constituted by one helical spring 9. And the movable contact spring 4 is also used.
[0052]
In other words, the helix spring 9 used in the present embodiment has a coil portion inserted into the center column 11 of the bearing recess 10 as shown in FIGS. One of the two end portions, which is the bottom side of the bearing recess 10, is used as the spring body 3, and one end portion of the bearing recess 10 protrudes in the lateral direction. And a tip portion of the extension piece 30b is bent into a substantially U-shape to form a bottom portion of the bearing recess 10 and a fixed contact portion 22a on the outer R surface. The movable contact part 40a which contacts the contact part 7 is formed.
[0053]
On the other hand, a lateral piece 31a projecting in the lateral direction so as to open at a fixed angle with respect to the lateral piece 30a from the side surface side of the coil part from which the lateral piece 30a of the one end protrudes, It is bent line-symmetrically from the tip of the horizontal piece 31a to the hanging piece 31b, which is hung parallel to the side surface of the coil part, and from the tip of the hanging piece 31b, to the extension piece 30b when viewed from the coil end face. An extension piece 31c extending obliquely in the direction of the bottom of the bearing recess 10 is formed. The distal end of the extension piece 31c is bent into a substantially U-shape, and the bottom of the bearing recess 10 and the fixed contact portion are formed on the outer R surface. A movable contact portion 40b that contacts the common contact portion 22b and the common contact portion 7 is formed.
[0054]
In the case of the present embodiment, as shown in FIG. 10A, the return spring body 3 composed of the coil portion of the helical spring 9 is inserted into the cylindrical body 11 of the bearing recess 10, and the helical spring is provided. The horizontal pieces 30a, 31a at one end of the elastic member 9 are elastically brought into contact with the side surfaces of the arc-shaped projection 16 and the engagement projection 23 in a state of being expanded against the elastic force. In this state, similarly to the case described in the first embodiment, the rotary handle body is moved so that the position of the operation body 21 is kept at the intermediate position of the window hole 12, that is, the neutral position, by the elastic force of both ends of the return spring body 3. Holding 2. At this time, the movable contact portions 40a and 40b are in contact with the common contact portion 7 exposed at the bottom of the bearing recess 10. It should be noted that a metal switch 1B is attached to the opening side of the bearing recess 10 as shown in FIG. In the present embodiment, the position of the arc-shaped protrusion 16 and the position of the engagement protrusion 23 are on the opposite side to the protrusion position of the operating body 21.
[0055]
Now, when an operating force is applied to the operating body 21 in the left direction, for example, as shown in FIG. 11A, the rotating handle body 2 rotates to the left, and the engaging projection 23 is hung on the end face that is forward in the rotating direction. One end of the spring 9 is pushed to move the movable contact 40a at the tip of the extension piece 30b onto the fixed contact 5a exposed at the bottom of the bearing recess 10. On the other hand, since the movement of the other end of the helical spring 9 is regulated by the arc-shaped projections 16, the extension piece 31c does not move and remains in contact with the common contact 7. As a result, the helix spring 9 functions as a movable contact spring, and conducts between the common terminal 8 and the switch terminal 6a as shown in FIG.
[0056]
Next, when the operating force is released, the side surface of the engaging projection 23 with which the horizontal piece 30a at one end abuts is moved by the resilient force in the anti-rotation direction accumulated in the return spring body 3 composed of the coil part. Press to rotate the rotating shaft body 20 rightward. As a result, the extension piece 30b also moves to move the movable contact portion 40a from the fixed contact portion 5a onto the common contact portion 7.
[0057]
When the horizontal piece 30a at one end of the helical spring 9 contacts the arc-shaped projection 16, the rotation of the rotary shaft 20 is restricted, and the rotary handle 2 is returned to the original position for positioning the operating body 21 at the neutral position. I will return.
[0058]
If an operating force is applied to the right in the figure, the extension piece 31c at the other end of the helical spring 9 moves, and the movable contact 40b at the tip thereof contacts the fixed contact 5b. The connection with the terminal 6b is established.
[0059]
In this embodiment configured as described above, the number of components can be reduced by configuring the movable contact spring 4 and the return spring body 3 with one helical spring 9. In addition, since the conduction path between the switch terminal 6a and the common terminal 8 and the conduction path between the switch terminal 6b and the common terminal 8 pass through the helical spring 9, the rotation angle of the rotary shaft 20 is the same. In this case, the electrical resistance of the conduction path is the same regardless of the rotation direction, so that the output characteristics of the switch do not change depending on the rotation direction (operation direction).
[0060]
(Embodiment 4)
In the present embodiment, the return spring body 3 and the movable contact spring 4 are also used by a helical spring as in the third embodiment. However, in the present embodiment, the return spring body 3 including a coil portion is illustrated. As shown in FIGS. 12 (a) and 12 (b), the lower end face is placed on the common contact 7 exposed at the bottom of the bearing recess 10 around the base of the cylinder 11 when inserted into the cylinder 11. The connection is made electrically.
[0061]
As shown in FIGS. 13A to 13C, the helix spring 9 used in the present embodiment has a coil portion inserted into a cylindrical body 11 at the center of the bearing recess 10 as in the first and second embodiments. It is used as the body 3, and of the two end portions, the tip of the extension piece portion 301 a obliquely extending from the tip of the one end portion 300 a on the opposite bottom side of the bearing concave portion 10 is formed in a letter shape, and the outer convex surface thereof, A movable contact portion 40a that contacts the bottom of the bearing recess 10 and the fixed contact portion 22a is formed.
[0062]
On the other hand, the tip of an extension piece 301b that extends obliquely downward from the tip of the other end 300b, which is the bottom side of the bearing recess 10, is formed in a letter-shape, and its outer convex surface forms the bottom of the bearing recess 10 and a fixed contact. The movable contact part 40b which contacts the part 22b is formed.
[0063]
The position of the engagement protrusion 23 of the rotary handle body 2 and the position of the arc-shaped protrusion 16 erected from the bottom of the bearing recess 10 are on the operation body 21 side.
[0064]
Note that other configurations and operations are the same as those in the above-described embodiments, and thus description thereof is omitted, and the same components are denoted by the same reference numerals.
[0065]
Thus, the rotary handle 2 is fitted into the bearing recess 10 of the body 1A, the helical spring 9 is inserted into the cylindrical body 11, and both ends 300a and 300b of the helical spring 9 are connected to the arc-shaped projection 16 and the engagement projection 23. When the operating body 21 is at the neutral position, that is, when the operating body 21 is in the neutral position, the movable contacts 40a, 40b at the tips of the extension pieces 301a, 301b at both ends are not shown in FIG. As shown in FIGS. 12A and 12B, it is located on the bottom of the bearing recess 10.
[0066]
In this state, a leftward (or rightward) operating force is applied to the operating body 21 and the rotating handle body 2 rotates leftward (or rightward) by a certain angle or more as shown in FIG. The movable contact portion 40a (or 40b) at the tip of the extension piece portion 301a (or 301b) pushed and moved by the side surface of the mating projection 23 is on the fixed contact portion 5a (or 5b) exposed at the bottom of the bearing recess 10. By moving and making contact as shown in FIG. 14B, the connection between the switch terminal 6a (or 6b) and the common terminal 8 is conducted through the helical spring 9.
[0067]
In the present embodiment, the position of the engagement protrusion 23 and the position of the arc-shaped protrusion 16 are positions on the operation body 21 side. Other configurations and operations are the same as those in the third embodiment, and thus description thereof is omitted.
[0068]
In the present embodiment configured as described above, the number of components can be reduced.
[0069]
(Embodiment 5)
In all of the first to fourth embodiments, a helix spring is used as the return spring body 3, but this embodiment is characterized in that the movable contact spring 4 and the return spring body 3 are integrally formed by a leaf spring. There is.
[0070]
That is, as shown in the plan view of FIG. 15A, the cross-sectional view in the AA direction of FIG. 15B, and the BB direction of FIG. , Which are formed in a substantially annular shape so that the plate surfaces are parallel to the axial direction by using a plate spring, and end portions 3a 'and 3b' which are expanded in a C shape from both ends thereof are projected. Arms 42 ′, 42 ′ are extended symmetrically from the lower ends of the ends 3 a ′, 3 b ′ (on the side of the bearing recess 10) along the periphery of the return spring 3, and these arms 42 ′, 42 ′ are extended. A pair of contact pieces 43 ', 43' are formed parallel to the tip of the arm, and the arm pieces 42 ', 42' and the contact pieces 43 ', 43' constitute the movable contact spring 4. Then, the tip of each contact piece 43 ', 43' is bent into a V-shape, and a movable contact is formed at the outer protruding portion, and the movable contact part 40a or 40b is formed by the movable contact of both contact pieces 43 ', 43'. Make up.
[0071]
Further, the position of the engagement protrusion 23 of the rotary handle body 2 and the position of the arc-shaped protrusion 16 erected from the bottom of the bearing recess 10 of the body 1A are opposite to the operation body 21 side as shown in FIG. The arc-shaped projections 16 are erected from the bottom of the bearing recess 10 in such a manner that the back surface is formed so as to be integrated with the side surface of the cylindrical body 11 as shown in FIGS. 16 (a) and 16 (b).
[0072]
The configurations of the fixed contact portions 5a and 5b and the common contact portion 7 that are exposed in the bearing recess 10 of the body 1A are the same as those in the first embodiment, and a description thereof will be omitted. In addition, components having the same functions as those of the above-described embodiment in other configurations are denoted by the same reference numerals, and description thereof is omitted.
[0073]
In the present embodiment, first, the substantially annular return spring body 3 is inserted into the cylindrical body 11 at the center of the bearing recess 10 of the body 1A. At this time, an arc-shaped projection 16 is interposed between both ends 3a 'and 3b' to expand the both ends 3a 'and 3b', and these both ends 3a 'and 3b' are elastically attached to both side surfaces of the arc-shaped projection 16. Contact At this time, the end of the return spring body 3 is disposed above the bottom of the bearing recess 10 at the base of the cylindrical body 11. In addition, the engaging projection 23 of the rotary shaft 20 of the rotary handle body 2 previously fitted into the bearing recess 10 is interposed between the front ends of both ends 3a and 3b of the return spring body 3, and the front end is It is elastically contacted with both side surfaces of the engaging projection 23.
[0074]
At this time, since both ends 3a 'and 3b' of the return spring body 3 generate a resilient force in the opposite direction, an equal force is applied to both sides of the engagement protrusion 23, and the rotating shaft body 20 is operated by the operating body. 21 is held at a position at the center of the window hole 12.
[0075]
At this time, the movable contact spring 4 is in a state where the movable contact portions 40a and 40b at both ends are in contact with the common contact portion 7.
[0076]
In this state, a leftward (or rightward) operation force is applied to the operating body 21 and the rotating shaft body 20 rotates leftward (or rightward) by a certain angle or more as shown in FIG. The fixed contact portion 5a (or 5b) in which the movable contact portion 40a (or 40b) at the tip of the end portion 3a '(or 3b') pushed by the side surface of the mating projection 23 is exposed at the bottom of the bearing recess 10. The movable contact part 40b (or 40a) moves on the common contact part 7 and comes into contact as shown in FIG. 17B, and the switch terminal 6a is moved through the movable contact spring 4 and the return spring body 3. (Or 6b) and the common terminal 8 are conducted.
[0077]
Then, when the operating force is released, the side surface of the engaging projection 23 is moved by the end 3a '(or 3b') due to the elastic force accumulated when the end 3a '(or 3b') is pushed and moved. The rotating shaft body 20 is rotated to a position where the end portion 3a 'is pressed and the rotation is restricted by the end portion 3a' abutting on the side surface of the arc-shaped projection 16, whereby the rotating handle body 2 returns to the original position and the operating body 21 To the neutral position. Further, at this time, since both the movable contact portions 40a and 40b are located on the common contact portion 7, the conduction between the switch terminal 6a (or 6b) and the common terminal 8 is not conducted.
[0078]
In the present embodiment configured as described above, the number of components can be reduced by configuring the movable contact spring 4 and the return spring body 3 with one leaf spring. Further, a conduction path between the switch terminal 6a and the common terminal 8 and a conduction path between the switch terminal 6b and the common terminal 8 pass through a path including the movable contact spring 4 and the return spring body 3, so that If the rotation angle of the rotation shaft body 20 is the same, the electrical resistance of the conduction path is the same regardless of the rotation direction, so that the output characteristics of the switch do not change depending on the rotation direction (operation direction).
[0079]
【The invention's effect】
According to the first aspect of the present invention, since the window for projecting the operating body of the rotary handle body to the outside is closed on the outer peripheral surface of the rotary shaft body, the inside of the apparatus main body can be externally used without using a special dustproof structure. Since the intrusion of dust into the switch body can be prevented, and the movable contact spring and the return spring body are housed in the rotary shaft of the rotary handle body, the space can be effectively used, and the size of the switch device can be easily reduced.
[0080]
According to the second aspect of the present invention, the neutral position of the operating body is fixed at a fixed position without being affected by the left-right return force of the return spring body. No special spring adjustment is required.
[0081]
A third aspect of the present invention is a switch that has the same conductive path length between the switch terminal and the common terminal at the time of contact with any of the fixed contact portions, and does not cause a difference in switching resistance, and thus has no variation. The output is obtained.
[0082]
According to the fourth aspect of the present invention, the movable contact spring and the return spring can be shared by one helical spring, so that the number of parts can be reduced and the cost can be reduced.
[0083]
According to the fifth aspect of the present invention, since the movable contact spring and the return spring body can be shared by a single helical spring, the number of parts can be reduced, cost can be reduced, and even when any fixed contact portion is contacted. Since the length of the conductive path between the switch terminal and the common terminal is the same, there is no difference in switching resistance, and a switch output with no variation can be obtained.
[0084]
According to the sixth aspect of the present invention, since the movable contact spring and the return spring body can be integrally formed by a leaf spring, the number of parts can be reduced and cost can be reduced. The length of the conductive path between the terminal and the common terminal becomes the same, so that there is no difference in switching resistance, so that a switch output with no variation can be obtained.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a first embodiment.
FIG. 2 (a) is a side view showing a state in which the cover is removed.
(B) is AA sectional drawing in the state where the cover of the same (a) was attached.
(C) is a BB cross-sectional view in a state where the cover of (a) is attached.
FIG. 3 is a plan view of the same movable contact spring.
FIG. 4 is a plan view of the return spring body according to the first embodiment;
FIG. 5 is an overall perspective view of the same.
FIG. 6 is an operation explanatory view of the above.
FIG. 7A is a side view of the second embodiment with a cover removed.
(B) is AA sectional drawing in the state where the cover of the same (a) was attached.
(C) is a BB cross-sectional view in a state where the cover of (a) is attached.
FIG. 8 is a plan view of the rotary handle.
FIG. 9A is a plan view of a helix spring used in a third embodiment.
(B) is one side view of the same as (a).
(C) is another side view of the same as (a).
FIG. 10A is a side view showing a state where the cover is removed.
(B) is AA sectional drawing in the state where the cover of the same (a) was attached.
FIG. 11 (a) is a side view for explaining the operation of the above and with a cover removed.
(B) is a BB cross-sectional view in a state where the cover of (a) is attached.
FIG. 12A is a side view of the fourth embodiment with a cover removed.
(B) is AA sectional drawing in the state where the cover of the same (a) was attached.
FIG. 13A is a plan view of a helix spring used in the above.
(B) is one side view of the same as (a).
(C) is another side view of the same as (a).
FIG. 14 (a) is a side view for explaining the operation of the above and with a cover removed.
(B) is a BB cross-sectional view in a state where the cover of (a) is attached.
FIG. 15A is a plan view of a return spring body and a movable contact spring used in a fifth embodiment.
(B) is an AA sectional view of (a) of the above.
FIG. 3C is a view taken in the direction of arrows BB in FIG.
FIG. 16A is a side view showing a state in which the cover is removed.
(B) is AA sectional drawing in the state where the cover of the same (a) was attached.
FIG. 17 (a) is a side view illustrating a state in which a cover is removed for explaining the operation of the above.
(B) is a BB cross-sectional view in a state where the cover of (a) is attached.
[Explanation of symbols]
1 Device body
1A body
1B cover
10 Bearing recess
11 cylinder
12 windows
2 rotating handle
20 rotating shaft
21 Operation body
3 Return spring body
4 Movable contact spring
6a, 6b switch terminal
8 common terminals

Claims

A rotating handle body comprising an annular rotating shaft body and an operating body protruding from the outer peripheral surface of the rotating shaft body;
A bearing recess for accommodating the rotating shaft body and rotatably guiding the outer circumferential surface of the rotating shaft body on an inner circumferential surface, and a standing portion is provided upright from a bottom portion of a substantially central portion of the bearing recess, and a central portion of the rotating shaft body. A device body provided with a columnar body disposed on the peripheral wall of the bearing recess, and a window hole through which the operating body is movably inserted from the bearing recess to the outside and between both ends in the circumferential direction.
At a position symmetrical with respect to a line connecting the center of the operating body and the center of the rotary shaft, and on the bottom of the bearing recess between the inner circumferential surface of the rotary shaft and the outer circumferential surface of the cylindrical body. A pair of pairs arranged so as to be movable in the circumferential direction and provided in correspondence with the rotation direction of the rotating shaft body, and cooperating in the circumferential direction of the bearing recess in accordance with the rotating direction of the rotating shaft body. A movable contact spring for moving the movable contact,
A line symmetrically with respect to a line connecting the center of the operating body and the center of the rotating shaft body is provided at the bottom of the bearing recess, and cooperates with the rotation of the rotating shaft body in conjunction with the operation moving direction of the operating body. A pair of fixed contact portions that come into contact with the movable contact portion of one movable contact spring that moves;
While being inserted into the cylindrical body, the movement of one end is restricted during rotation of the rotary shaft accompanying the operation movement of the operating body, and the other end engages with the rotary shaft to rotate in the rotation direction. A substantially annular spring body that accumulates a resilient force in the anti-rotation direction by being pushed in, and returns and rotates the rotary shaft body with the resilient force when the operating force of the operating body is released. Prepare,
The apparatus main body includes first and second switch terminals electrically connected to the fixed contact portion, respectively, and a common terminal to which the movable contact spring is electrically connected. Switch device.

The spring body has one end and the other end protruding outward from substantially the same side position, and abutting the one end and the other end on both side surfaces to oppose these ends against elastic force. An arc-shaped projection that expands at a certain angle when viewed from the center is projected from the bottom of the bearing recess, and a center line that divides the arc-shaped projection into two right and left parts is defined by the center of the operating body and the rotation shaft body. Set on the line connecting the center,
The center line of the operating body and the center of the rotating shaft body have a center line that has both sides having the same opening angle as the opening angles of the both sides of the arc-shaped projection when viewed from the center of the rotating shaft body and is divided into two sides. An engagement projection set on a line connecting the projection protrusions on the inner peripheral surface of the bearing recess,
When the operating body is at the center position of the movement range, one end and the other end of the return spring body abut on both side surfaces of the arc-shaped protrusion and both side surfaces of the engagement protrusion, When the operating body is moved, the corresponding end of the spring body is pushed and moved by the side of the engaging projection which is on the front side in the moving direction, and the other end is moved by the side of the arc-shaped projection on the rear side in the moving direction. The switch device according to claim 1, wherein a resilient force in an anti-rotational direction is accumulated in the return spring body by regulating the spring force.

The return spring body is configured such that the coil portion is inserted into the cylindrical body, and both ends of the coil body projecting outward from the side surface of the coil portion are formed in the arc shape in a state where the operating body is located at the center position of the movement range. Formed by a helical spring that elastically contacts both sides of the projection and the engagement projection,
The movable contact spring has a central portion fixed by a portion of the rotary shaft opposite to a projecting position of the operating body on a line connecting the center of the operating body and the center of the rotary shaft. It is formed by an arc-shaped leaf spring provided with a movable contact portion at the tip of each arm piece extended symmetrically in the left-right direction along the circumferential direction of the rotary shaft body,
In the bearing concave portion, a common contact portion electrically connected to a common terminal is provided at a position between the position where the pair of fixed contact portions is provided and below the movable contact spring,
3. The movable contact spring according to claim 2, wherein one of the movable contact portions of the movable contact spring is in contact with the fixed contact portion while the other of the movable contact portions is in contact with the common contact when the rotating shaft body rotates. Switch device.

The return spring body is configured such that the coil portion is inserted into the cylindrical body, and both ends of the coil body projecting outward from the side surface of the coil portion are formed in the arc shape in a state where the operating body is located at the center position of the movement range. Formed by a helical spring elastically contacting both sides of the projection and the engagement projection,
The movable contact spring is formed of the helical spring, and forms a movable contact portion at a leading end of an extended portion extending from each of the both ends,
The bearing recess is electrically connected to the common terminal in a peripheral portion of the base of the columnar body, and the end of the coil portion of the helical spring inserted in the columnar body is mounted thereon. 3. The switch device according to claim 2, wherein a common contact portion electrically connected to the spring is formed.

The return spring body is configured such that the coil portion is inserted into the cylindrical body, and both ends of the coil body projecting outward from the side surface of the coil portion are formed in the arc shape in a state where the operating body is located at the center position of the movement range. Formed by a helical spring elastically contacting both sides of the projection and the engagement projection,
The movable contact spring is formed of the helical spring, and forms a movable contact portion at a leading end of an extended portion extending from each of the both ends,
The bearing recess is provided with a common contact portion electrically connected to a common terminal at a position between the positions where the pair of fixed contact portions is provided and below the movable contact spring,
3. The movable contact spring according to claim 2, wherein one of the movable contact portions of the movable contact spring is in contact with the fixed contact portion while the other of the movable contact portions is in contact with the common contact when the rotating shaft body rotates. Switch device.

The return spring body has a substantially annular portion formed by bending the plate surface so as to be parallel to the axial direction, is inserted into the columnar body, and both ends of the annular portion projecting outward are formed by the operating body. In the state of being at the center position of the movement range, formed by a plate spring elastically contacting both side surfaces of the arc-shaped projection and the engagement projection,
The movable contact spring is formed by the leaf spring, and forms a movable contact portion at a tip of an arm piece formed to extend symmetrically in the left-right direction from the both ends along the inner peripheral surface of the rotating shaft body. ,
The bearing recess is provided with a common contact portion electrically connected to a common terminal at a position between the positions where the pair of fixed contact portions is provided and below the movable contact spring,
3. The movable contact spring according to claim 2, wherein one of the movable contact portions of the movable contact spring is in contact with the fixed contact portion while the other of the movable contact portions is in contact with the common contact when the rotating shaft body rotates. Switch device.