JP3820048B2

JP3820048B2 - Switch manufacturing method

Info

Publication number: JP3820048B2
Application number: JP01711199A
Authority: JP
Inventors: 上原　　智; 忠深代; 好幸篠原
Original assignee: Matsushita Electric Works Ltd
Current assignee: Panasonic Electric Works Co Ltd
Priority date: 1999-01-26
Filing date: 1999-01-26
Publication date: 2006-09-13
Anticipated expiration: 2019-01-26
Also published as: JP2000215755A

Description

【０００１】
【発明の属する技術分野】
本発明は、スイッチの製造方法に関するものである。
【０００２】
【従来の技術】
従来より、照明器具などではプルスイッチと称するスイッチが用いられている。この種のスイッチとしては、図１１に示すように、スイッチ本体４０内に固着された一対の固定接点片４１と、スイッチ本体４０内にラチェット式に一方向回転可能に取り付けられ、固定接点片４１に接離自在に接触する可動接点片４２と、この可動接点片４２と同軸に回動自在に設けられ、可動接点片４２とラチェット式に噛み合うことにより可動接点片４２を一方向に回転させる駆動ハンドル１３と、一端部が駆動ハンドル１３の端部に取り付けられるとともに他端部がスイッチ本体４０から外部に引き出された引き紐２１とを備えたものがあり、引き紐２１の引っ張り操作に応じて駆動ハンドル１３が回動すると、駆動ハンドル１３と可動接点片４２とがラチェット式に噛み合うことにより、可動接点片４２が一方向に回転して、固定接点片４１と可動接点片４２とが接触または開離していた（実開昭５６−１５５３９号公報参照）。
【０００３】
【発明が解決しようとする課題】
上記構成のスイッチでは、駆動ハンドル１３の一端部に設けられた紐通し孔３１に引き紐２１の先端を通して、引き紐２１の先端に結び目３２を作り、結び目３２を紐通し孔３１に係止させることにより、引き紐２１を駆動ハンドル１３に取り付けていたため、作業性が悪いという問題があった。また、引き紐１２を引っ張る力が結び目３２に直接かかるので、結び目３２がほどけるのを防止するために、結び目３２を二重にしたり、結び目３２に接着剤を塗布したりしていたため、作業性がさらに悪化するという問題があった。そのうえ引き紐２１の先端を結んで結び目３２を作っているため（図１２参照）、引き紐２１の他端部に設けられた握り部２８と結び目３２との間の寸法（図１２のＬ１）のばらつきが大きくなって、スイッチ本体から外部に引き出される引き紐２１の長さ寸法がばらつくという問題があり、また結び目３２から引き紐２１の先端までの長さ（図１２のＬ２）が長くなると、駆動ハンドル１３の回動時にスイッチ本体の内面に引き紐２１の先端が当たり、駆動ハンドル１３がスムーズに回動できない虞もあった。
【０００４】
本発明は上記問題点に鑑みて為されたものであり、その目的とするところは、組立作業の作業性を向上させるとともに、引っ張り操作部の寸法精度を向上させたスイッチの製造方法を提供することにある。
【０００５】
【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の発明では、スイッチ本体に設けられた固定接点と、略円板状であって中心に設けた回転軸を介してスイッチ本体に回動自在に取り付けられた駆動ハンドルと、駆動ハンドルの回動に応じて固定接点と接離自在に接触する可動接点とを備え、駆動ハンドルの平面方向と略直交する方向に突出する突出片を駆動ハンドルと一体に設け、突出片に設けた切欠部と係止する係止手段が一端部に設けられるとともに、スイッチ本体の外側に引き出される他端部に握り部が設けられ、握り部の引っ張り操作に応じて駆動ハンドルを回動させる引き紐からなる引っ張り操作部を備え、係止手段を、引き紐と一体的に形成された略球状の係止部で構成したスイッチの製造方法であって、係止部を引き紐と一体的に形成するに当たり、前記握り部には引っ張り操作を行うための操作孔を設けてあり、前記握り部の操作孔内に前記係止部が配置された状態で複数組の係止部および握り部を所定の間隔をおいて引き紐と一体に樹脂成形し、各組の係止部と握り部との間を分離することによって前記引っ張り操作部を形成することを特徴とする。
【０００６】
この発明によれば、引き紐には複数組の係止部および握り部が所定の間隔をおいて設けられているので、各組の係止部と握り部との間を分離するだけで所定の長さ寸法の引っ張り操作部を形成することができ、しかも引き紐に無駄となる部分が全くなく、さらに複数組の係止部および握り部を連続的に成形することにより、引っ張り操作部の製造工程を容易に自動化できる。
【０００７】
請求項２の発明では、スイッチ本体に設けられた固定接点と、略円板状であって中心に設けた回転軸を介してスイッチ本体に回動自在に取り付けられた駆動ハンドルと、駆動ハンドルの回動に応じて固定接点と接離自在に接触する可動接点とを備え、駆動ハンドルの平面方向と略直交する方向に突出する突出片を駆動ハンドルと一体に設け、突出片に設けた切欠部と係止する係止手段が一端部に設けられるとともに、スイッチ本体の外側に引き出される他端部に握り部が設けられ、握り部の引っ張り操作に応じて駆動ハンドルを回動させる引き紐からなる引っ張り操作部を備え、係止手段を、引き紐と一体的に形成された略球状の係止部で構成したスイッチの製造方法であって、スイッチの係止部を引き紐と一体的に形成するに当たり、引っ張り操作を行うための操作孔が設けられた握り部と係止部との組を複数組、各組の係止部と握り部との間の引き紐に沿って合成樹脂を流すことにより、所定の間隔をおいて引き紐と一体的に樹脂成形し、各組の係止部と握り部との間を分離することにより前記引っ張り操作部を形成することを特徴とする。
【０００８】
この発明によれば、引き紐には複数組の係止部および握り部が所定の間隔をおいて設けられているので、各組の係止部と握り部との間を分離するだけで所定の長さ寸法の引っ張り操作部を形成することができ、しかも引き紐に無駄となる部分が全くなく、さらに複数組の係止部および握り部を連続的に成形することにより、引っ張り操作部の製造工程を容易に自動化でき、且つ、各組の係止部と握り部との間の引き紐に沿って合成樹脂を流すことにより係止部と握り部とが樹脂成形されるので、各組の係止部と握り部との間の引き紐を分離する際に、係止部と握り部との間にできる樹脂成形部を同時に切断することができる。
【０００９】
【発明の実施の形態】
以下に本発明の実施の形態を図面を参照して説明する。
【００１０】
（基本構成）
本発明に係る製造方法を適用するスイッチの基本的な構成を図面を参照して説明する。このスイッチのスイッチ本体は、図１乃至図４に示すように、後述の接点部を収納するための収納凹所３が前面に設けられた略箱状のボディ１と、収納凹所３の開口を塞ぐようにしてボディ１に被着されるカバー２とで構成されており、ボディ１及びカバー２はそれぞれ絶縁材料から形成されている。
【００１１】
カバー２は前面が略矩形状に形成されており、カバー２の短幅方向における両側辺の一端部および中間部には背方に突出する係止爪片４，５が一対づつ突設されている。両側辺の一端部に設けられた係止爪片４の先端には内側に突出する爪４ａが突設されており、両側辺の中間部に設けられた係止爪片５の先端には外側に突出する爪５ａが突設されている。一方、ボディ１の外周面における係止爪片４に対応する部位には爪４ａと係止する係止溝６が設けられ、係止爪片５に対応する部位には爪５ａと係止する係止孔７が設けられており、係止爪片４の爪４ａを係止溝６に係止させるとともに、係止爪片５の爪５ａを係止孔７に係止させることによって、ボディ１とカバー２とが結合される。
【００１２】
収納凹所３の内底面の略中央にはボス８が突設され、ボス８の上面には所定角度ごとに段部を有する段座９が設けられている。段座９の中心にはボス穴８ａが開口しており、ボス穴８ａに回動軸１０の一端部が挿入される。カバー２の内面には回転軸１０の他端部を支持する受け座１１が設けられており、回転軸１０をボス穴８ａに挿入した状態でボディ１にカバー２を被着すると、ボディ１とカバー２との間に回転軸１０が保持される。
【００１３】
回転軸１０には段車１２を介して駆動ハンドル１３が回動自在に取り付けられる。駆動ハンドル１３は導電性材料から形成され、回転軸１０が挿入される孔１４ａが中心に穿設された略円板状の回動板１４を有しており、回動板１４の周縁部における孔１４ａを挟んで対角の部位からは一対の可動接点片１５が回動板１４と連続一体に設けられ、各可動接点片１５には後述する固定接点２４と接離自在に接触する可動接点１６が設けられている。さらに、一方の可動接点片１５の端部からは、駆動ハンドル１３の平面方向と略直交する方向に突出する固定片１７が連続一体に設けられており、固定片１７の曲がり部には先端よりも幅の狭くなったくびれ部１８が設けられている。固定片１７の先端部には略Ｌ字状の一対の引掛片１９が先端部を対向させるようにして設けられており、一対の引掛片１９の間に略Ｔ字状の被係止部たる切欠き部２０が設けられる。また回動板１４には８つの開口１４ｂが孔１４ａを中心とする円周上に約４５度おきに設けられている。ここに、駆動ハンドル１３、可動接点１６、固定接点２４などから接点部が構成される。
【００１４】
一方、段車１２の中心には回転軸１０を挿通させる孔１２ａが穿設されており、周方向に突出する４つの接触片１２ｂが約９０度おきに設けられている。孔１２ａを挟んで対角の位置にある一対の接触片１２ｂの端縁には、段座９の段部と係止する爪（図示せず）が端縁を段座９側に起こすことによって設けられており、他の一対の接触片１２ｂの端縁には、駆動ハンドル１３の開口１４ｂと係止する爪（図示せず）が端縁を駆動ハンドル１３側に起こすことによって形成されている。
【００１５】
ここで、駆動ハンドル１３は、固定片１７を図２中左側に向けた状態で、段車１２を介して回動軸１０に回動自在に軸着される。引き紐２１の一端部には、合成樹脂により略球状の係止部２２が引き紐２１と一体的に樹脂成形（一体成形）されており、この係止部２２を切欠き部２０に係止させた後、固定片１７のくびれ部１８が設けられた部位に引き紐２１を巻き付けることにより、引き紐２１が駆動ハンドル１３に取り付けられる。引き紐２１はボディ１に設けられた切欠溝２７から外部に引き出されている。引き紐２１の他端部には引っ張り操作を行うための操作孔２８ａを有する握り部２８が取り付けられており、握り部２８を用いて引き紐２１の引っ張り操作を行うことにより駆動ハンドル１３が回動する。ここに、引き紐２１、係止部２２および握り部２８から引っ張り操作部Ａが構成される。なお、このスイッチでは切欠き部２０の形状を略Ｔ字状に形成しているが、切欠き部２０の形状を略Ｔ字状に限定する趣旨のものではなく、係止部２２が係止されるのであれば、切欠き部２０の形状を略Ｌ字状に形成しても良い。
【００１６】
このように、係止部２２を駆動ハンドル１３の切欠き部２０に係止させた後、引き紐２１を固定片１７に巻き付けると、引き紐２１がくびれ部１８と引っ掛け係止されて抜け止めが行われ、引き紐２１が駆動ハンドル１３に取り付けられるので、従来のスイッチのように引き紐を結ぶ作業がなく、組立作業の作業性が向上する。また、係止部２２は合成樹脂により引き紐２１と一体成形されているので、係止部２２を所望の位置に形成することができ、引っ張り操作部Ａの寸法精度が向上して、スイッチ本体から突出する引っ張り操作部Ａの長さ寸法の精度が向上する。
【００１７】
以下にこのスイッチの動作を簡単に説明する。駆動ハンドル１３はコイルばねよりなる復帰ばね２３により回転軸１０を中心として図１中時計回りに付勢されており、引き紐２１を引いていない状態では、固定片１７が設けられた側の可動接点片１５が図１中上側となるように駆動ハンドル１３は傾斜している。収納凹所３の内部には、引き紐２１を引いていない状態で駆動ハンドル１３に設けられた可動接点１６と電気的に接触する位置に固定接点２４が配置されているので、引き紐２１を引いていない状態では固定接点２４と可動接点１６とが電気的に接触し、一対の固定接点２４，２４の間が駆動ハンドル１３を介して電気的に接続される。また、ボディ１の収納凹所３内には駆動ハンドル１３の表面と摺接する導電ばね２５を有する導電板２６が配設されており、導電板２６は駆動ハンドル１３を介して各固定接点２４に電気的に接続されている。なお、各固定接点２４は所謂速結端子からなる端子部（図示せず）に電気的に接続されており、ボディ１の側壁には端子部に結線される電線を外部より挿入するための電線挿入孔２９や、マイナスドライバなどの工具を挿入して電線と端子部との接続状態を解除するための工具挿入孔３０が設けられている。
【００１８】
引き紐２１を引いて、駆動ハンドル１３を復帰ばね２３のばね力に抗して図１中反時計回りに回転させると、可動接点１６と固定接点２４とが開離し、両固定接点２４，２４間および導電板２６と各固定接点２４との間が非導通状態となる。ところで、駆動ハンドル１３が図１中反時計回りに回転すると、段車１２の接触片１２ｂに設けられた爪片が駆動ハンドル１３の開口１４ｂに係止することによって、段車１２が駆動ハンドル１３と供回りし、段車１２の接触片１２ｂに設けられた爪片が段座９の段部を乗り越えることにより、クリック感が発生する。
【００１９】
その後、引き紐２１を離すと、駆動ハンドル１３が復帰ばね２３の復帰力によって図１中時計回りに回転して元の位置に戻り、可動接点１６と固定接点２４とが電気的に接触し、両固定接点２４，２４間および導電板２６と固定接点２４との間が導通状態となる。なお、駆動ハンドル１３の開口１４ｂは段車１２の接触片１２ｂ上を滑って元の位置に戻るので、段車１２は供回りすることはない。
【００２０】
（参考例１）
ここで、スイッチの製造方法の参考例を図５（ａ）（ｂ）を参照して説明する。なお、引っ張り操作部Ａ以外のスイッチの構成は図１〜図４に示すスイッチと同様であるので、異なる部分についてのみ以下に説明を行う。
【００２１】
このスイッチでは、図５（ａ）に示すように複数組の係止部２２および握り部２８を所定の間隔をおいて引き紐２１に一体成形し、各組の係止部２２と握り部２８との間の引き紐２１を切断して、係止部２２と握り部２８との間を分離することにより、個々の引っ張り操作部Ａが形成される（図５（ｂ）参照）。このように、係止部２２と握り部２８とは所定の間隔をおいて引き紐２１に一体成形されているので、係止部２２および握り部２８を所望の位置に形成することができ、引っ張り操作部Ａの寸法精度が向上し、スイッチ本体から突出する引っ張り操作部Ａの長さ寸法の精度が向上する。また、各組の係止部２２と握り部２８との間を分離すると、個々の引っ張り操作部Ａが形成されるので、引き紐２１が無駄となる部分がない。さらに、複数組の係止部２２および握り部２８を連続的に成形することにより、引っ張り操作部Ａの製造工程を容易に自動化できる。
【００２２】
（実施形態１）
本発明に係るスイッチの製造方法を図６（ａ）（ｂ）を参照して説明する。なお、引っ張り操作部Ａ以外のスイッチの構成は図１〜図４に示すスイッチと同様であるので、異なる部分についてのみ以下に説明を行う。
【００２３】
このスイッチでは、図６（ａ）に示すように、握り部２８に設けられた操作孔２８ａ内に係止部２２が配置されるように、複数組の係止部２２および握り部２８を所定の間隔をおいて引き紐２１に一体成形し、各組の係止部２２と握り部２８との間の引き紐２１を切断して、係止部２２と握り部２８との間をを分離することにより引っ張り操作部Ａを形成している（図６（ｂ）参照）。このように、係止部２２と握り部２８とは所定の間隔をおいて引き紐２１と一体成形されているので、係止部２２および握り部２８を所望の位置に形成することができ、引っ張り操作部Ａの寸法精度が向上し、スイッチ本体から突出する引っ張り操作部Ａの長さ寸法の精度が向上する。また、各組の係止部２２と握り部２８との間を分離すると、個々の引っ張り操作部Ａが形成されるので、引き紐２１が無駄となる部分がない。さらに、複数組の係止部２２および握り部２８を連続的に成形することにより、引っ張り操作部Ａの製造工程を容易に自動化できる。
【００２４】
（実施形態２）
ところで、上述の参考例１では、一般的に係止部２２に成形ゲート３５から合成樹脂を充填するとともに、操作部２８に成形ゲート３６から合成樹脂を充填することにより、係止部２２と操作部２８とを樹脂成形している（図７参照）。したがって、引き紐２１に係止部２２と操作部２８とを一体成形した後、個々の引っ張り操作部Ａに分離するために、成形ゲート３５，３６を切断して成形ランナー３４を除去するとともに、係止部２２と操作部２８との間の引き紐２１を切断しており、３カ所を切断する必要があった。
【００２５】
そこで、本実施形態では、図８（ａ）（ｂ）に示すように、係止部２２および操作部２８を引き紐２１と一体成形する際に、例えば図示しない成形ゲートから操作部２８に合成樹脂を充填するとともに、操作部２８から引き紐２１の表面に沿って係止部２２に合成樹脂を充填することによって、係止部２２および操作部２８を引き紐２１と一体成形しており、引き紐２１に係止部２２と操作部２８とを一体成形した後、操作部２８に合成樹脂を充填する成形ゲートを切断するとともに、係止部２２と操作部２８との間の引き紐２１を切断して、個々の引っ張り操作部Ａに分離する。ここで、係止部２２と操作部２８との間の引き紐２１を切断する際に、係止部２２と操作部２８との間に形成される樹脂成形部３３を同時に切断することができるので、係止部２２および操作部２８にそれぞれ成形ゲートから樹脂を充填する場合に比べて切断箇所を１カ所減らすことができる。なお、引っ張り操作部Ａ以外の構成は実施形態１又は２と同様であるので、同一の構成要素については図示および説明を省略する。
【００２６】
（参考例２）
スイッチの製造方法の別の参考例を図９を参照して説明する。なお、引っ張り操作部Ａ以外のスイッチの構成は図１〜図４に示すスイッチと同様であるので、異なる部分についてのみ以下に説明を行う。
【００２７】
本参考例では、合成樹脂から形成された引き紐２１の一端部を溶かして略球状の塊３８を形成しており、この塊３８から係止部２２を構成している。このように、係止部２２は引き紐２１の一端部を溶かすことにより形成されているので、係止部２２を形成するために他の部材を用いる必要がなく、引っ張り操作部Ａのコストダウンを図ることができ、しかも引っ張り操作部Ａを形成するのに必要な部材の種類が減るから、部材管理が容易になる。
【００２８】
（参考例３）
スイッチの製造方法のまた別の参考例を図１０（ａ）（ｂ）を参照して説明する。なお、引っ張り操作部Ａ以外のスイッチの構成は図１〜図４に示すスイッチと同様であるので、異なる部分についてのみ以下に説明を行う。
【００２９】
本参考例では、引き紐２１の一端部に短冊状の金属片３７をかしめ固定することにより、係止部を構成しており、金属片３７をかしめるだけで係止部が形成されるので、組立作業の作業性が向上する。また、金属片３７は引き紐２１にかしめ固定されているので、引き紐２１と金属片３７との締付強度が大きく、引っ張り操作部Ａに大きな引っ張り力が加わった場合でも金属片３７が引き紐２１から外れることはない。
【００３０】
【発明の効果】
上述のように請求項１の発明は、スイッチ本体に設けられた固定接点と、略円板状であって中心に設けた回転軸を介してスイッチ本体に回動自在に取り付けられた駆動ハンドルと、駆動ハンドルの回動に応じて固定接点と接離自在に接触する可動接点とを備え、駆動ハンドルの平面方向と略直交する方向に突出する突出片を駆動ハンドルと一体に設け、突出片に設けた切欠部と係止する係止手段が一端部に設けられるとともに、スイッチ本体の外側に引き出される他端部に握り部が設けられ、握り部の引っ張り操作に応じて駆動ハンドルを回動させる引き紐からなる引っ張り操作部を備え、係止手段を、引き紐と一体的に形成された略球状の係止部で構成したスイッチの製造方法であって、係止部を引き紐と一体的に形成するに当たり、握り部には引っ張り操作を行うための操作孔を設けてあり、握り部の操作孔内に係止部が配置された状態で複数組の係止部および握り部を所定の間隔をおいて引き紐と一体に樹脂成形し、各組の係止部と握り部との間を分離することによって引っ張り操作部を形成したことを特徴とする。この発明によれば、引き紐には複数組の係止部および握り部が所定の間隔をおいて設けられているので、各組の係止部と握り部との間を分離するだけで所定の長さ寸法の引っ張り操作部を形成することができ、しかも引き紐に無駄となる部分が全くなく、さらに複数組の係止部および握り部を連続的に成形することにより、引っ張り操作部の製造工程を容易に自動化できる
請求項２の発明は、スイッチ本体に設けられた固定接点と、略円板状であって中心に設けた回転軸を介してスイッチ本体に回動自在に取り付けられた駆動ハンドルと、駆動ハンドルの回動に応じて固定接点と接離自在に接触する可動接点とを備え、駆動ハンドルの平面方向と略直交する方向に突出する突出片を駆動ハンドルと一体に設け、突出片に設けた切欠部と係止する係止手段が一端部に設けられるとともに、スイッチ本体の外側に引き出される他端部に握り部が設けられ、握り部の引っ張り操作に応じて駆動ハンドルを回動させる引き紐からなる引っ張り操作部を備え、係止手段を、引き紐と一体的に形成された略球状の係止部で構成したスイッチの製造方法であって、係止部を引き紐と一体的に形成するに当たり、引っ張り操作を行うための操作孔が設けられた握り部と係止部との組を複数組、各組の係止部と握り部との間の引き紐に沿って合成樹脂を流すことにより、所定の間隔をおいて引き紐と一体的に樹脂成形し、各組の係止部と握り部との間を分離することにより引っ張り操作部を形成することを特徴とする。この発明によれば、引き紐には複数組の係止部および握り部が所定の間隔をおいて設けられているので、各組の係止部と握り部との間を分離するだけで所定の長さ寸法の引っ張り操作部を形成することができるという効果があり、しかも引き紐に無駄となる部分が全くなく、さらに複数組の係止部および握り部を連続的に成形することにより、引っ張り操作部の製造工程を容易に自動化でき、且つ、各組の係止部と握り部との間の引き紐に沿って合成樹脂を流すことにより係止部と握り部とが樹脂成形されるので、各組の係止部と握り部との間の引き紐を分離する際に、係止部と握り部との間にできる樹脂成形部を同時に切断できるという効果がある。
【図面の簡単な説明】
【図１】スイッチの基本構成を示す分解斜視図である。
【図２】同上のスイッチの断面図である。
【図３】同上のスイッチの正面側から見た外観斜視図である。
【図４】同上のスイッチの裏面側から見た外観斜視図である。
【図５】（ａ）（ｂ）は参考例１の引っ張り操作部の説明図である。
【図６】（ａ）（ｂ）は実施形態１の引っ張り操作部の説明図である。
【図７】参考例１の引っ張り操作部の製造工程を示す説明図である。
【図８】実施形態２の引っ張り操作部を示し、（ａ）は製造工程の説明図、（ｂ）はＢ−Ｂ断面図である。
【図９】参考例２の引っ張り操作部の説明図である。
【図１０】参考例３の引っ張り操作部を示し、（ａ）は外観斜視図、（ｂ）はＣ−Ｃ断面図である。
【図１１】従来のスイッチを示す分解斜視図である。
【図１２】同上のスイッチの引っ張り操作部を示す外観斜視図である。
【符号の説明】
Ａ引っ張り操作部
１０回転軸
１３駆動ハンドル
１４回動板
１５可動接点片
１７固定片
２０切欠き部
２１引き紐
２２係止部
２４固定接点[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for manufacturing a switch .
[0002]
[Prior art]
Conventionally, a switch called a pull switch has been used in a lighting fixture or the like. As this type of switch, as shown in FIG. 11, a pair of fixed contact pieces 41 fixed in the switch body 40 and a ratchet-type attached to the switch body 40 so as to be rotatable in one direction. A movable contact piece 42 that comes in contact with and away from the movable contact piece, and a drive that is rotatably provided coaxially with the movable contact piece 42, and that rotates the movable contact piece 42 in one direction by meshing with the movable contact piece 42 in a ratchet manner. There is one provided with a handle 13 and a pull string 21 with one end attached to the end of the drive handle 13 and the other end pulled out from the switch body 40, and depending on the pulling operation of the pull string 21 When the drive handle 13 rotates, the drive handle 13 and the movable contact piece 42 mesh with each other in a ratchet manner, so that the movable contact piece 42 rotates in one direction and is fixed. And the point piece 41 and the movable contact piece 42 had separated contact or open (see Japanese Unexamined Utility Model Publication No. 56-15539).
[0003]
[Problems to be solved by the invention]
In the switch having the above configuration, a knot 32 is formed at the leading end of the pulling string 21 through the leading end of the pulling string 21 through the stringing hole 31 provided at one end of the drive handle 13, and the knot 32 is locked to the stringing hole 31. As a result, the pull string 21 was attached to the drive handle 13, and there was a problem that workability was poor. In addition, since the pulling force of the pull string 12 is directly applied to the knot 32, the knot 32 is doubled or an adhesive is applied to the knot 32 in order to prevent the knot 32 from being unwound. There was a problem that the sex was further deteriorated. In addition, since the knot 32 is formed by tying the tip of the drawstring 21 (see FIG. 12), the dimension between the grip 28 provided at the other end of the drawstring 21 and the knot 32 (L1 in FIG. 12). When the length from the knot 32 to the tip of the drawstring 21 (L2 in FIG. 12) becomes longer, there is a problem that the length of the drawstring 21 drawn outside from the switch body varies. When the drive handle 13 is rotated, the tip of the pull cord 21 hits the inner surface of the switch body, and the drive handle 13 may not be smoothly rotated.
[0004]
The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a method for manufacturing a switch that improves the workability of assembly work and improves the dimensional accuracy of a pulling operation portion. There is.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, the switch body is rotatably attached to the switch body through a fixed contact provided on the switch body and a substantially disc-shaped rotation shaft provided at the center. And a movable contact that comes in contact with and away from the fixed contact according to the rotation of the drive handle, and a protruding piece that protrudes in a direction substantially perpendicular to the plane direction of the drive handle is provided integrally with the drive handle. The locking means for locking with the notch portion provided in the protruding piece is provided at one end portion, and the grip portion is provided at the other end portion which is pulled out to the outside of the switch body, and the drive handle according to the pulling operation of the grip portion A switch manufacturing method comprising a pulling operation portion made of a pulling string for rotating the lock, and the locking means is constituted by a substantially spherical locking portion formed integrally with the pulling string. Integrate with string In this case, the grip portion is provided with an operation hole for performing a pulling operation, and the plurality of sets of the lock portion and the grip portion are set in a predetermined state in a state where the lock portion is disposed in the operation hole of the grip portion. The pulling operation portion is formed by resin-molding integrally with the drawstring at an interval, and separating between the locking portion and the grip portion of each set.
[0006]
According to the present invention, the pull string is provided with a plurality of sets of locking portions and grip portions at a predetermined interval, so that it is determined only by separating between the locking portions and the grip portions of each set. The pulling operation portion of the length dimension can be formed, and there is no wasted portion in the pull string, and further, by continuously forming a plurality of sets of locking portions and gripping portions, The manufacturing process can be easily automated.
[0007]
According to a second aspect of the present invention, there is provided a fixed contact provided on the switch body, a drive handle that is substantially disc-shaped and rotatably attached to the switch body via a rotation shaft provided at the center, A notch provided in the projecting piece is provided with a projecting piece that is integrally provided with the drive handle, and has a movable contact that comes in contact with and away from the fixed contact according to the rotation. The holding means is provided at one end portion, and a grip portion is provided at the other end portion that is pulled out to the outside of the switch body, and includes a pulling string that rotates the drive handle in accordance with a pulling operation of the grip portion. A method of manufacturing a switch comprising a pulling operation portion and the locking means comprising a substantially spherical locking portion formed integrally with the pull string , wherein the switch lock portion is formed integrally with the pull string In doing so, By flowing a plurality of sets of grip portions and locking portions provided with operation holes for carrying out the operation, and flowing synthetic resin along the drawstring between the locking portions and the grip portions of each set, integrally molded with drawstrings at predetermined intervals, and forming the pull manipulation unit by separating between the grip portion each set of the engaging portion.
[0008]
According to the present invention, the pull string is provided with a plurality of sets of locking portions and grip portions at a predetermined interval, so that it is determined only by separating between the locking portions and the grip portions of each set. The pulling operation portion of the length dimension can be formed, and there is no wasted portion in the pull string, and further, by continuously forming a plurality of sets of locking portions and gripping portions, Since the manufacturing process can be easily automated, and the synthetic resin is flowed along the pull string between the engagement portion and the grip portion of each set, the engagement portion and the grip portion are resin-molded. When separating the drawstring between the locking portion and the grip portion, the resin molded portion formed between the locking portion and the grip portion can be cut simultaneously .
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0010]
(Basic configuration)
A basic configuration of a switch to which a manufacturing method according to the present invention is applied will be described with reference to the drawings. As shown in FIGS. 1 to 4, the switch body of this switch includes a substantially box-shaped body 1 having a housing recess 3 for housing a contact portion described later, and an opening of the housing recess 3. The cover 1 is attached to the body 1 so as to close the cover, and the body 1 and the cover 2 are each made of an insulating material.
[0011]
The front surface of the cover 2 is formed in a substantially rectangular shape, and a pair of locking claw pieces 4 and 5 projecting backward are projected from one end and an intermediate portion of both sides in the short width direction of the cover 2. Yes. A claw 4a projecting inwardly protrudes from the tip of the locking claw piece 4 provided at one end of both sides, and the outside of the tip of the locking claw piece 5 provided at the middle part of both sides. A claw 5a that protrudes from the front is projected. On the other hand, a portion of the outer peripheral surface of the body 1 corresponding to the locking claw piece 4 is provided with a locking groove 6 for locking with the claw 4a, and a portion corresponding to the locking claw piece 5 is locked with the claw 5a. A locking hole 7 is provided, and the claw 4 a of the locking claw piece 4 is locked to the locking groove 6, and the claw 5 a of the locking claw piece 5 is locked to the locking hole 7. 1 and the cover 2 are combined.
[0012]
A boss 8 protrudes from substantially the center of the inner bottom surface of the storage recess 3, and a step seat 9 having step portions at predetermined angles is provided on the upper surface of the boss 8. A boss hole 8a is opened at the center of the stepped seat 9, and one end of the rotating shaft 10 is inserted into the boss hole 8a. A receiving seat 11 that supports the other end of the rotating shaft 10 is provided on the inner surface of the cover 2. When the cover 2 is attached to the body 1 with the rotating shaft 10 inserted into the boss hole 8 a, The rotating shaft 10 is held between the cover 2 and the cover 2.
[0013]
A drive handle 13 is rotatably attached to the rotary shaft 10 via a step wheel 12. The drive handle 13 is formed of a conductive material, and has a substantially disc-shaped rotation plate 14 with a hole 14a into which the rotation shaft 10 is inserted. A pair of movable contact pieces 15 are continuously provided integrally with the rotating plate 14 from diagonal parts across the hole 14a, and each movable contact piece 15 is in contact with a fixed contact 24, which will be described later, so as to come into contact with and move away from each other. 16 is provided. Further, a fixed piece 17 protruding in a direction substantially orthogonal to the plane direction of the drive handle 13 is provided continuously from one end of the movable contact piece 15. A constricted portion 18 having a narrow width is also provided. A pair of substantially L-shaped hooking pieces 19 are provided at the distal end portion of the fixed piece 17 so that the distal end portions are opposed to each other, and between the pair of hooking pieces 19 is a substantially T-shaped locked portion. A notch 20 is provided. The rotating plate 14 is provided with eight openings 14b on the circumference around the hole 14a at intervals of about 45 degrees. Here, a contact portion is constituted by the drive handle 13, the movable contact 16, the fixed contact 24, and the like.
[0014]
On the other hand, a hole 12a through which the rotary shaft 10 is inserted is formed in the center of the step wheel 12, and four contact pieces 12b protruding in the circumferential direction are provided at intervals of about 90 degrees. At the end edges of the pair of contact pieces 12b located diagonally across the hole 12a, a claw (not shown) that engages with the stepped portion of the stepped seat 9 raises the end toward the stepped seat 9 side. A claw (not shown) that engages with the opening 14b of the drive handle 13 is formed at the edge of the other pair of contact pieces 12b by raising the edge toward the drive handle 13 side. .
[0015]
Here, the drive handle 13 is pivotally attached to the rotary shaft 10 via the step wheel 12 with the fixed piece 17 facing the left side in FIG. A substantially spherical locking portion 22 is integrally molded with the pulling cord 21 at one end portion of the pulling cord 21 by resin (integral molding). The locking portion 22 is locked to the notch 20. Then, the drawstring 21 is attached to the drive handle 13 by winding the drawstring 21 around the portion of the fixed piece 17 where the constricted portion 18 is provided. The drawstring 21 is pulled out from a notch groove 27 provided in the body 1. A grip portion 28 having an operation hole 28 a for performing a pulling operation is attached to the other end portion of the pull cord 21, and the drive handle 13 is rotated by pulling the pull cord 21 using the grip portion 28. Move. Here, the pulling portion 21, the locking portion 22, and the grip portion 28 constitute a pull operation portion A. In this switch , the shape of the cutout portion 20 is formed in a substantially T shape, but the shape of the cutout portion 20 is not intended to be limited to a substantially T shape, and the lock portion 22 is locked. If it does, you may form the shape of the notch part 20 in a substantially L shape.
[0016]
In this way, after the locking portion 22 is locked to the notch portion 20 of the drive handle 13, when the pulling string 21 is wound around the fixed piece 17, the pulling string 21 is hooked and locked with the constricted portion 18 to prevent it from coming off. Since the pull string 21 is attached to the drive handle 13, there is no work for tying the pull string as in the conventional switch, and the workability of the assembly work is improved. Further, since the locking portion 22 is integrally formed with the pull string 21 from a synthetic resin, the locking portion 22 can be formed at a desired position, and the dimensional accuracy of the pull operation portion A is improved, and the switch body. The accuracy of the length dimension of the pulling operation portion A protruding from the head is improved.
[0017]
The operation of this switch will be briefly described below. The drive handle 13 is urged clockwise in FIG. 1 about the rotary shaft 10 by a return spring 23 made of a coil spring. When the pulling cord 21 is not pulled, the drive handle 13 is movable on the side where the fixed piece 17 is provided. The drive handle 13 is inclined so that the contact piece 15 is on the upper side in FIG. Since the fixed contact 24 is disposed in the storage recess 3 at a position where it is in electrical contact with the movable contact 16 provided on the drive handle 13 in a state where the pull string 21 is not pulled, the pull string 21 is When not pulled, the fixed contact 24 and the movable contact 16 are in electrical contact, and the pair of fixed contacts 24, 24 are electrically connected via the drive handle 13. In addition, a conductive plate 26 having a conductive spring 25 slidably contacting the surface of the drive handle 13 is disposed in the housing recess 3 of the body 1, and the conductive plate 26 is connected to each fixed contact 24 via the drive handle 13. Electrically connected. Each fixed contact 24 is electrically connected to a terminal portion (not shown) formed of a so-called quick connection terminal, and an electric wire for inserting an electric wire connected to the terminal portion from the outside to the side wall of the body 1. An insertion hole 29 and a tool insertion hole 30 for releasing a connection state between the electric wire and the terminal portion by inserting a tool such as a minus driver are provided.
[0018]
When the pulling cord 21 is pulled and the drive handle 13 is rotated counterclockwise in FIG. 1 against the spring force of the return spring 23, the movable contact 16 and the fixed contact 24 are separated, and the fixed contacts 24, 24 are separated. And between the conductive plate 26 and each fixed contact 24 become non-conductive. By the way, when the drive handle 13 rotates counterclockwise in FIG. 1, the claw piece provided on the contact piece 12 b of the step wheel 12 is engaged with the opening 14 b of the drive handle 13, thereby causing the step wheel 12 to move to the drive handle 13. When the claw pieces provided on the contact piece 12b of the corrugated carriage 12 get over the step portion of the step seat 9, a click feeling is generated.
[0019]
Thereafter, when the pull string 21 is released, the drive handle 13 is rotated clockwise in FIG. 1 by the return force of the return spring 23 to return to the original position, and the movable contact 16 and the fixed contact 24 are in electrical contact, Between the two fixed contacts 24, 24 and between the conductive plate 26 and the fixed contact 24 are brought into conduction. Since the opening 14b of the drive handle 13 slides on the contact piece 12b of the carriage 12 and returns to the original position, the carriage 12 does not rotate.
[0020]
(Reference Example 1)
Here, a reference example of the manufacturing method of the switch will be described with reference to FIGS. In addition, since the structure of switches other than the pull operation part A is the same as that of the switch shown in FIGS. 1-4, only a different part is demonstrated below.
[0021]
In this switch , as shown in FIG. 5 (a), a plurality of sets of locking portions 22 and grip portions 28 are integrally formed with a pull string 21 at a predetermined interval, and each set of locking portions 22 and grip portions 28. Each of the pulling operation portions A is formed by cutting the drawstring 21 between the two and separating the locking portion 22 and the grip portion 28 (see FIG. 5B). Thus, since the locking part 22 and the grip part 28 are integrally formed with the pull string 21 at a predetermined interval, the locking part 22 and the grip part 28 can be formed at desired positions. The dimensional accuracy of the pull operation portion A is improved, and the length accuracy of the pull operation portion A protruding from the switch body is improved. In addition, when each pair of the locking portion 22 and the grip portion 28 is separated, the individual pulling operation portions A are formed, and therefore there is no portion where the pull string 21 is wasted. Furthermore, by continuously forming a plurality of sets of locking portions 22 and grip portions 28, the manufacturing process of the pull operation portion A can be easily automated.
[0022]
(Embodiment 1)
A method for manufacturing a switch according to the present invention will be described with reference to FIGS. In addition, since the structure of switches other than the pull operation part A is the same as that of the switch shown in FIGS. 1-4, only a different part is demonstrated below.
[0023]
In this switch , as shown in FIG. 6A, a plurality of sets of the locking portions 22 and the grip portions 28 are set in a predetermined manner so that the locking portions 22 are disposed in the operation holes 28a provided in the grip portion 28. Are formed integrally with the pull string 21 with an interval of, and the pull string 21 between each set of the locking portion 22 and the grip portion 28 is cut to separate the locking portion 22 and the grip portion 28 from each other. By doing so, the pulling operation portion A is formed (see FIG. 6B). Thus, since the locking part 22 and the grip part 28 are integrally formed with the pull string 21 at a predetermined interval, the locking part 22 and the grip part 28 can be formed at desired positions. The dimensional accuracy of the pull operation portion A is improved, and the length accuracy of the pull operation portion A protruding from the switch body is improved. In addition, when each pair of the locking portion 22 and the grip portion 28 is separated, the individual pulling operation portions A are formed, and therefore there is no portion where the pull string 21 is wasted. Furthermore, by continuously forming a plurality of sets of locking portions 22 and grip portions 28, the manufacturing process of the pull operation portion A can be easily automated.
[0024]
(Embodiment 2)
By the way, in the above-described reference example 1 , generally, the engaging portion 22 is filled with the synthetic resin from the molding gate 35 and the operation portion 28 is filled with the synthetic resin from the forming gate 36 to thereby operate the engaging portion 22 and the operation portion. The part 28 is resin-molded (see FIG. 7). Accordingly, after integrally forming the locking portion 22 and the operation portion 28 on the pull string 21, in order to separate the individual pull operation portions A, the forming gates 35 and 36 are cut to remove the forming runner 34, The pull string 21 between the locking portion 22 and the operation portion 28 is cut, and it is necessary to cut three places.
[0025]
Therefore, in the present embodiment, as shown in FIGS. 8A and 8B, when the locking portion 22 and the operation portion 28 are integrally formed with the drawstring 21, for example, a composition from a molding gate (not shown) to the operation portion 28 is synthesized. The filling portion 22 and the operation portion 28 are integrally formed with the drawstring 21 by filling the resin with the synthetic resin from the operation portion 28 along the surface of the drawstring 21 to the engagement portion 22. After the locking portion 22 and the operation portion 28 are integrally formed on the pull string 21, the molding gate for filling the operation portion 28 with synthetic resin is cut, and the pull string 21 between the lock portion 22 and the operation portion 28 is cut. Are separated into individual pulling operation sections A. Here, when the pull string 21 between the locking portion 22 and the operation portion 28 is cut, the resin molding portion 33 formed between the locking portion 22 and the operation portion 28 can be cut simultaneously. Therefore, it is possible to reduce the number of cut portions by one as compared with the case where the locking portion 22 and the operation portion 28 are filled with resin from the molding gate. Since the configuration other than the pull operation unit A is the same as that of the first or second embodiment, illustration and description of the same components are omitted.
[0026]
(Reference Example 2)
Another reference example of the manufacturing method of the switch will be described with reference to FIG. In addition, since the structure of switches other than the pull operation part A is the same as that of the switch shown in FIGS. 1-4, only a different part is demonstrated below.
[0027]
In this reference example, one end portion of the drawstring 21 made of synthetic resin is melted to form a substantially spherical lump 38, and the lump 38 constitutes the locking portion 22. Thus, since the locking part 22 is formed by melting one end of the pull string 21, it is not necessary to use another member to form the locking part 22, and the cost of the pulling operation part A is reduced. In addition, since the types of members necessary to form the pulling operation portion A are reduced, member management is facilitated.
[0028]
(Reference Example 3)
Another reference example of the manufacturing method of the switch will be described with reference to FIGS. In addition, since the structure of switches other than the pull operation part A is the same as that of the switch shown in FIGS. 1-4, only a different part is demonstrated below.
[0029]
In the present reference example, the locking portion is formed by caulking and fixing the strip-shaped metal piece 37 to one end portion of the drawstring 21, and the locking portion is formed simply by caulking the metal piece 37. As a result, workability of assembly work is improved. Further, since the metal piece 37 is caulked and fixed to the drawstring 21, the tightening strength between the drawstring 21 and the metal piece 37 is large, and the metal piece 37 is pulled even when a large pulling force is applied to the pull operation portion A. It does not come off the string 21.
[0030]
【The invention's effect】
As described above, the invention of claim 1 includes a fixed contact provided on the switch body, and a drive handle that is substantially disc-shaped and rotatably attached to the switch body via a rotation shaft provided at the center. And a movable contact that comes in contact with and away from the fixed contact according to the rotation of the drive handle, and a projecting piece that projects in a direction substantially perpendicular to the plane direction of the drive handle is provided integrally with the drive handle. Locking means for locking with the notch provided is provided at one end, and a grip is provided at the other end pulled out of the switch body, and the drive handle is rotated according to the pulling operation of the grip. A method for manufacturing a switch comprising a pulling operation portion made of a pull string, and the locking means comprising a substantially spherical locking portion formed integrally with the pull string, wherein the lock portion is integrated with the pull string A handful in forming Is provided with an operation hole for performing a pulling operation, and a plurality of sets of locking portions and grip portions are arranged at predetermined intervals with a locking portion arranged in the operation hole of the grip portion. A pulling operation portion is formed by resin molding integrally and separating between the locking portion and the grip portion of each set . According to the present invention , the pull string is provided with a plurality of sets of locking portions and grip portions at a predetermined interval, so that it is determined only by separating between the locking portions and the grip portions of each set. The pulling operation portion of the length dimension can be formed, and there is no wasted portion in the pull string, and further, by continuously forming a plurality of sets of locking portions and gripping portions, The manufacturing process can be easily automated. The invention according to claim 2 is rotatably attached to the switch body via a fixed contact provided in the switch body and a substantially disc-shaped rotation shaft provided in the center. A drive handle and a movable contact that comes in contact with and away from the fixed contact according to the rotation of the drive handle, and a protruding piece that protrudes in a direction substantially perpendicular to the plane direction of the drive handle is provided integrally with the drive handle. Lock with the notch on the protruding piece The pulling operation portion is formed of a pulling string that rotates the drive handle in accordance with the pulling operation of the gripping portion, and the gripping portion is provided at the other end portion that is pulled out to the outside of the switch body. A method of manufacturing a switch comprising a substantially spherical locking portion formed integrally with a pull string, and a pulling operation for forming the lock portion integrally with the pull string. A plurality of sets of grip portions and locking portions provided with operation holes for carrying out the operation, and by flowing a synthetic resin along a draw string between the locking portions and the grip portions of each set, integrally molded with drawstrings at intervals, and forming the operation unit tensile by separating between the grip portion each set of the engaging portion. According to the present invention , the pull string is provided with a plurality of sets of locking portions and grip portions at a predetermined interval, so that it is determined only by separating between the locking portions and the grip portions of each set. There is an effect that it is possible to form a pulling operation portion of the length dimension, there is no wasted portion in the pull string, and further, by continuously forming a plurality of sets of locking portions and grip portions, The manufacturing process of the pulling operation part can be easily automated, and the locking part and the grip part are resin-molded by flowing a synthetic resin along the draw string between the locking part and the grip part of each set. Therefore, there is an effect that the resin-molded portion formed between the locking portion and the grip portion can be simultaneously cut when separating the draw string between the locking portion and the grip portion of each set.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing a basic configuration of a switch .
FIG. 2 is a sectional view of the switch.
FIG. 3 is an external perspective view of the above switch as viewed from the front side.
FIG. 4 is an external perspective view of the above switch as seen from the back side.
FIGS. 5A and 5B are explanatory views of a pull operation unit of Reference Example 1. FIGS.
6A and 6B are explanatory views of a pull operation unit according to the first embodiment.
7 is an explanatory diagram illustrating a manufacturing process of the pull operation unit of Reference Example 1. FIG.
FIGS. 8A and 8B show a pull operation unit according to a second embodiment, where FIG. 8A is an explanatory diagram of a manufacturing process, and FIG.
FIG. 9 is an explanatory diagram of a pull operation unit according to Reference Example 2 ;
10A and 10B show a pull operation unit of Reference Example 3, wherein FIG. 10A is an external perspective view, and FIG.
FIG. 11 is an exploded perspective view showing a conventional switch.
FIG. 12 is an external perspective view showing a pull operation portion of the switch.
[Explanation of symbols]
A Pulling operation unit 10 Rotating shaft 13 Drive handle 14 Rotating plate 15 Movable contact piece 17 Fixed piece 20 Notch portion 21 Pull string 22 Locking portion 24 Fixed contact point

Claims

A fixed contact provided on the switch body, a drive handle that is substantially disk-shaped and rotatably attached to the switch body via a rotation shaft provided at the center, and a fixed contact according to the rotation of the drive handle And a movable contact that is detachably contacted with the drive handle, and a protruding piece that protrudes in a direction substantially perpendicular to the plane direction of the drive handle is provided integrally with the drive handle, and is a locking means for locking with a notch provided in the protruding piece. Is provided at one end, a grip portion is provided at the other end that is pulled out of the switch body, and includes a pulling operation portion that includes a pulling string that rotates the drive handle in accordance with the pulling operation of the grip portion , A method for manufacturing a switch, in which the locking means is formed of a substantially spherical locking portion formed integrally with the pull string, and when the locking portion is formed integrally with the pull string, Perform pulling operation An operation hole is provided, and a plurality of sets of locking portions and gripping portions are integrally molded with a pull string at a predetermined interval in a state where the locking portion is disposed in the operation hole of the gripping portion. Then, the pulling operation portion is formed by separating between the locking portion and the grip portion of each group, and the manufacturing method of the switch.

A fixed contact provided on the switch body, a drive handle that is substantially disk-shaped and rotatably attached to the switch body via a rotation shaft provided at the center, and a fixed contact according to the rotation of the drive handle And a movable contact that is detachably contacted with the drive handle, and a protruding piece that protrudes in a direction substantially perpendicular to the plane direction of the drive handle is provided integrally with the drive handle, and is a locking means for locking with a notch provided in the protruding piece. Is provided at one end, a grip portion is provided at the other end that is pulled out to the outside of the switch body, and includes a pull operation portion that includes a pull string that rotates the drive handle in accordance with the pull operation of the grip portion, A method of manufacturing a switch, in which the locking means is configured by a substantially spherical locking portion formed integrally with a pull string, and a grip portion provided with an operation hole for performing a pulling operation, and a locking portion Multiple sets of By flowing synthetic resin along the pulling string between the locking part and the grip part of the set, the resin is integrally molded with the pulling string at a predetermined interval, and the locking part and the gripping part of each set A method for manufacturing a switch, wherein the pulling operation portion is formed by separating the gaps.