JP4024465B2

JP4024465B2 - Lamp socket

Info

Publication number: JP4024465B2
Application number: JP2000289992A
Authority: JP
Inventors: 登茂之小野; 嘉憲福島
Original assignee: Matsushita Electric Works Ltd
Current assignee: Panasonic Electric Works Co Ltd
Priority date: 2000-09-25
Filing date: 2000-09-25
Publication date: 2007-12-19
Anticipated expiration: 2020-09-25
Also published as: JP2002100450A

Description

【０００１】
【発明の属する技術分野】
この発明は、直管型蛍光ランプ等の照明器具に適用する直管型ランプのランプソケットに関するものである。
【０００２】
【従来の技術】
直管型ランプのランプピンを挿入させる穴部を前面に有し、穴部の内周面から外側面に延びるランプピン挿通溝を前面に形成したソケット本体と、穴部に回転自在に装着されランプピン挿通溝に連なってランプピンの一方を案内するランプピン案内凹部を前面の直径方向に形成し直管型ランプの回転に合わせて回転する回転子と、穴部内の回転子の周面に対向するように配設されてランプピンの周面に接触する一対の導電ばねとを備えたはさみ込み型ランプソケットがある。
【０００３】
第１の従来例（例えば実公昭50-10695号）は、回転子の回転位置を位置決めするため、回転子の底部外周縁に沿って複数の切欠を形成し、この切欠に弾性係合する凸部をランプソケットの弾性の背面板に形成している。
【０００４】
第２の従来例（例えば実公昭５０−１０６９６号）は、回転子の裏面に多数の凹部を円形に並べ、凹部に嵌まる球体とスプリングをランプソケットの背板に入れたものである。
【０００５】
第３の従来例（例えば特開昭５９−４０４７９号）は回転子の周方向に多数の凹部を設け背板に凸起を設け、回転子の弾性変形により凸起に係脱可能にしている。
【０００６】
第４の従来例（特開平８−１６７４５９号）は円筒形の回転子の内周面に突起を設け、回転子を支持する一対の支柱に係合凹部を形成し支柱を径方向に弾性変形可能にしている。
【０００７】
第５の従来例を図１７から図２０に示す。すなわち、図１７および図１８において、１００はボディ、１０１は円板１０１ａに立設した２本の略角柱状部１０１ｂからなる回転子、１０２は絶縁背面板、１０３は導電ばね、１０４は絶縁背面板１０２をボディ１００に固定するはとめ、１０５は導電ばね１０３に接続されたリード線、１０７はランプピン挿通溝、１０８はランプピン案内凹部、１０９は穴部である。図１９（ａ）および（ｂ）はランプピンを挿入できる状態であり、導電ばね１０３が回転子１０１の両側に弾接している。図２０は回転子１０１が約４５°回転した状態であり、回転子１０１の角１０１ｃが導電ばね１０３の浅いＶ字形の凹部１０３ａに図２０（ｃ）のように係合している。図１９（ｃ）はランプピン１０６が導電ばね１０３の凹部１０３ａに接触した状態である。
【０００８】
第６の従来例を図２１から図２３に示す。ボディ１００の穴部１０９内に一対の略半円筒状部１１０を立設し端部外周に周溝１１１を形成し、また穴部１０９に連通するランプピン挿通溝１０７から約４５°傾斜した位置に穴部１０９からＬ字スリット１１２を切り込んでその内側に弾性片１１３を形成し、弾性片１１３の先端部に山形突起１１４を形成している。回転子１０１は略半円筒状部１１０に外嵌する筒部１１５を有し筒部１１５に周溝１１１に係合する突条１１６を有し、回転子１０１のフランジ１１７はボディ１００の前面にかぶさる大きさを有しフランジ１１７の裏面に９０度間隔で４個の凹み１２０を設け、ボディ１００の山形突起１１４がこの凹み１２０に嵌まったところがランプを挿入・外しできる位置またはランプを使用状態にセットした位置である。１２１はボディ１００の裏面のカバーである。
【０００９】
【発明が解決しようとする課題】
第１の従来例は、合成樹脂製の背面絶縁板の弾性変形を回転子の回転抵抗に利用しているので、背面絶縁板として曲げ弾性率が高く、回転中の圧力でへたりを生じにくく、使用中の高温でもクリープ変形(へたり)を生じにくい材料を使用することにより実現できる。この要求に合う材料は熱可塑性樹脂ではポリカーボネートが代表的であるが汎用材料のポリプロピレン、ナイロンなどと比較して単価が高い。また熱硬化性樹脂は生産性が低く、強い力が加わると割れる欠点がある。また背面絶縁板が後方に変形することを見込むと、照明器具を一列に連続して取付けるときには隣接する照明器具のランプソケットの背面同士の間を空けなければならないので間隔が広くなり、その部分が暗くなる欠点がある。
【００１０】
第２の従来例は、回転子とランプソケットの背板との間にばねと球体が配置されるため、ランプソケットの厚さがその分だけ大きくなり、小型化できず部品代が高くつく。
【００１１】
第３の従来例は第１の従来例と同様にポリカーボネートなど使用材料が限られて、単価が高くなる。
【００１２】
第４の従来例も第１の従来例と同様に単価が高くなる。
【００１３】
第５の従来例は、図２０（ｂ）に示すように、導電ばね１０３の凹部１０３ａの内面で回転子１００の円板１０１ａの円形外周面と接する位置Ａ′よりも、回転子１００の略角柱状部１０１ｂの角１０１ｃの両端の位置Ｂ′がＸ軸寄りにある。したがってＬａで示した導電ばね１０３の凹部１０３ａのＶ形の谷にＬｂで示した回転子１０１の角柱状部１０１ｂの角１０１ｃの外周面が図２０（ｃ）に示すように完全にはまり込む。その結果、ランプを装着または外すために回転すれば約４５°の位置でこの状態が起こり、９０°回転するときに中間のところで回転トルクが高くなる。このためランプ装着時の回転が円滑でなく、正しいランプ装着位置と誤認することが起こるという欠点がある。
【００１４】
第６の従来例は、図２３（ｂ）に示すようにカバー１２１が反りや変形によりＸ′だけ内向きにずれると回転子１０１とボディ１００の接触面の相互の間隔ｙ′が広がり、山形突起１１４と凹部１２０の係脱によるクリック感やトルクが弱くなる。このため部品の寸法精度や変形のしにくさが要求される。またこれを防ぐためおよび繰り返しによるへたり防止する狙いでボディ１００は高弾性率でへたりにくく、削り摩耗しにくいポリカーボネートを使用し、回転子１０１は耐熱および高弾性率を得るガラス繊維を含有したポリブチレンテレフタレートを使用しているため、材料が高価になる。
【００１５】
したがって、この発明の目的は、挾み込み形ソケットにおいて、回転子の回転が円滑でクリック感がよくかつ安価にできるランプソケットを提供することである。
【００１６】
【課題を解決するための手段】
請求項１記載のランプソケットは、直管型ランプのランプピンを挿入させる穴部を前面に有し、前記穴部の内周面から外側面に延びるランプピン挿通溝を前面に形成したソケット本体と、前記穴部に回転自在に装着され前記ランプピン挿通溝に連なって前記ランプピンの一方を案内するように直径方向に延びるランプピン案内凹部を形成し前記直管型ランプの回転に合わせて回転する回転子と、前記穴部内の前記回転子の周面に対向するように配設されて前記直管型ランプの回転により前記ランプピンの周面に接触する一対の導電ばねとを備えたはさみ込み型ランプソケットであって、
前記導電ばねは、前記ランプピンの装着位置で前記ランプピンに係合する凹部を有し、
前記回転子は、直径が前記直管型ランプの一対のランプピンの最外表面間の長さより小さく、外周が前記導電ばねに弾接可能な略円柱形であり、前記ランプピン案内凹部が前記ランプピン挿通溝に連なったときに前記凹部と係合する凸部を有し、かつ前記凸部が前記凹部と係合した状態で前記導電ばねの前記凹部以外の部分が前記回転子に接触しないように前記凸部の両側部分に凹みを有し、この場合に前記凸部の先端は前記回転子の円周面と同じ高さであり、
前記ランプピンが前記導電ばねの前記凹部に係合した状態で前記導電ばねの前記凹部以外の部分が前記回転子に接触しないように前記回転子の前記ランプピンの両側に平面状の欠除部を有し、
前記凹みおよび欠除部は、前記回転子の回動により前記凸部または前記ランプピンが前記導電ばねの前記凹部から外れた状態で前記導電ばねの前記凹部の開口縁部は両方とも前記回転子の周面に常に弾接し、前記凹部の両開口縁部の一方に前記ランプピンまたは前記凸部が接触しているとき他方は前記回転子の周面に接触するように設定されていることを特徴とするものである。
【００１７】
請求項１記載のランプソケットによれば、ランプピンがランプピン挿通溝に挿脱されるランプの挿入および取外し位置からランプピンが導電ばねに接触するランプピン装着に至るまでのランプの往復回転ともに回転子の円周部が常に導電ばねに接している。回転子の円周面は回転軸と略同心であって導電ばねの内面を一定の直径内の円周上に維持するためトルク変化が小さくできるので、回転子の回転が円滑である。また導電ばねの最大たわみはランプピンの外側が導電ばねの凹部と当たったときであり、最小たわみは回転子の凸部が導電ばねの凹部に嵌まったときであり、この最も中心寄りの位置は回転子の凸部で規制している。したがって、たわみを繰り返す範囲は最大たわみと最小たわみの範囲であるから応力振幅が従来例より狭くなっており繰り返し疲労が少ない。このため、導電ばねのたわみ代が小さくなりばねの繰り返し疲労が少ないため長寿命にできる。さらにランプを挿入する角度およびランプを装着して停止する角度ではトルクがほぼゼロとなり、他の角度ではトルクが必要であるから、停止すべき角度が操作感触でも分かりやすい。
【００２０】
請求項２記載のランプソケットは、請求項１において、前記回転子が略円柱形の部分に肉盗み空間を凹設したものである。
【００２１】
請求項２記載のランプソケットによれば、請求項１と同様な効果がある。
【００２２】
請求項３記載のランプソケットは、請求項２において、前記肉盗み空間に１または複数の連結壁を設けたものである。
【００２３】
請求項３記載のランプソケットによれば、請求項２と同様な効果がある。
【００２４】
【発明の実施の形態】
この発明の第１の実施の形態を図１から図１０により説明する。すなわち、はさみ込み型ランプソケットであって、ソケット本体１と、回転子２と、導電ばね３を有する。
【００２５】
ソケット本体１は、直管蛍光ランプ等の直管型ランプのランプピンを挿入させる穴部４を前面に有し、穴部４の内周面から外側面に延びるランプピン挿通溝５を前面に形成し、このランプピン挿通溝５は電線引出穴６、７と反対側の頂部に形成している。実施の形態では一対の前カバー８と後カバー９からなり、互いに相嵌合して組み合わせ取付穴１０、１１に取付具（図示せず）を通して取付ける。前カバー８は穴部４とランプピン挿通溝５を有し、後カバー９は前カバー８を合わせたときの穴部４の中心位置に割り付き略円筒部１２を立設し、略円筒部１２の外周に周溝１３を形成し、割り溝１４はランプピン挿通溝５の長手方向に形成している。電線引出穴６、７は相整合する位置に形成している。１７は電線解除穴、１８は導電ばね係止溝、１９は速結端子部位置決め凹部である。
【００２６】
一対の導電ばね３は、穴部４内の回転子２の周面に対向するように配設されて直管型ランプの回転によりランプピンの周面に接触する。導電ばね３はランプピンの装着位置でランプピンに係合する凹部１５を段曲げしている。実施の形態では、帯状の板ばねにより形成し、その基端部に電線引出穴６、７に対応して速結端子部１６を一体形成している。導電ばね３の先端部を導電ばね係止溝１８に係止し、速結端子部１６を速結端子部位置決め凹部１９に位置決めして、導電ばね３を両端で２点支持している。
【００２７】
回転子２は、穴部４に回転自在に装着されランプピン挿通溝５に連なってランプピンの一方を案内するように直径方向に延びるランプピン案内凹部２０を形成しており、直管型ランプの回転に合わせて回転する。回転子２は外周が導電ばね３に弾接する略円柱形であり、ランプピン案内凹部２０がランプピン挿通溝５に連なったときに導電ばね３の凹部１５と係合する凸部２１を有し、かつ凸部２１が凹部１５と係合した状態で導電ばね３の凹部１５以外の部分が回転子２に接触しないように凸部２１の両側部分に凹み２２を形成している。回転子２の直径は例えば図３に示すように直管型ランプの一対のランプピンの最外表面間の長さと略同じである。
【００２８】
実施の形態では、回転子２の略円柱形が円筒体であり、その端部に穴部４に嵌合するフランジ３１を形成し、円筒体の内周面に周溝１３に摺動自在に係合する突条３２を形成している。また回転子２が導電ばね３の凹部１５に回転子２の凸部２１を嵌めて凸部２１で導電ばね３を押し広げたとき、回転子２の円周部を部分的に凹ませる凹み２２を形成して導電ばね３の凹部１５以外の部分が当たらないように配慮している。凹み２２と同じ狙いで回転子２の円周のランプピン案内凹部２０の近傍すなわちランプピン２３が通る溝２６の両側に欠除部２７を設けている。回転子２の円周部は回転中心と略同心であって円柱面の直径Φは適合するランプ口金の２本のランプピンの外側寸法ΦＤ以内であり、導電ばね３の内面に常に接している。そして回転子２の直径Φ、凹み２２および欠除部２７の寸法を決める条件はつぎのとおりである。
【００２９】
すなわち、条件１は図５に矢印で示すように、ランプを左回転して外しかけた状態であり、導電ばね３の凹部１５の開口縁部の一つが回転子２の欠除部２７にはまることによって回転力が変化する（かたくなる）ことを防ぐ条件がＡ≦Ｂである。これは図５に示すようにランプピン２３が凹部１５から離れる直前において回転子２の円周が導電ばね３に当たっている。このときＡはＸ軸から回転子の角（円周面と欠除部２７とのつながり部分）２５までのＹ方向寸法、ＢはＸ軸から導電ばね３が回転子２の円周面に当たっているところまでのＹ方向寸法である。
【００３０】
条件２は図６に示すように回転子２のランプ装着位置から回転子２を４５°回転した状態であり、条件１と同様にＣ≧Ｄである。Ｃは回転子２の円周面の弦の長さ（凹み２２と欠除部２７間の長さ）、Ｄは図６に示すように回転子２の円周面に当たっている、導電ばね３の凹部１５の両開口縁部の相互間の距離である。
【００３１】
条件３は図７に示すように回転子２の凸部２１が導電ばね３の凹部１５から外れた状態であり、条件１と同様にＥ≦Ｄである。Ｅは回転子２の凹み２２の部分の長さ（凸部２１の一側の円周部分から凹み２２が始まり、凹み２２が終わるまでの長さ）である。
【００３２】
条件４は図８に示すように、ランプピン２３の装着状態で回転子２の円周が導電ばね３に当たらないための条件である。ランプピン２３を取付けた図４の状態から回転子２に右まわしの力を加えて最悪にしたときでも、回転子２で導電ばね３を押すことはない。すなわち、第１は回転子２の円周角部（円周面と欠除部２７のつながり部分）２５は導電ばね３と離れている。第２は回転子２のランプピン２３が通るランプピン案内凹部２０の側面がランプピン２３に当たっている。第３はランプピン２３が右回転力により導電ばね３の凹部１５の下方端に寄っている、という条件を満足する。
【００３４】
図９（ａ）は本発明のランプ着脱時のトルクチャート、同図（ｂ）は図１０に示すように回転子２に導電ばね３が当たる円筒がないもののトルクチャートである（本発明でないもの）。本発明でないものは回転の途中にも停止すべき角度と同様の感触が生じるため問題を生じることがある。
【００３５】
図において、▲１▼は回転子２がランプ挿入位置にあるとき、▲２▼は回転子２が▲１▼より九十度回転した位置にあるとき（ランプ装着した状態）、Ａ、Ｃは回転子２の凸部２１が導電ばね３を外方に押し広げるときのトルクのピーク、Ｂ、Ｄはランプピン２３が導電ばね３を外方に押し広げるときのピーク、Ｅは回転子２の円周を導電ばね３が挾みつけた状態でのトルク、Ｆは回転子２の凸部２１およびランプピン２３がともに導電ばね３の凹部１５から離れている状態、Ｇは回転子２またはランプピン２３が導電ばね３の挾み力で付勢回転されてトルクが負になる。図９（ａ）のＥは回転子２の凸部２１が導電ばね３の凹部１５から外れた後のトルクであり、回転子２の円周で導電ばね３の挾みつける力を受けながら回転子２が回るため値の変動がある。そのため、常に摩擦しているので、トルクがゼロ〜負にならないので、この位置をランプ挿入位置（角度）またはランプ装着位置と誤って認識することがなくなる。一方、図９（ｂ）のＦは回転子２の凸部２１が導電ばね３の凹部１５から外れてから、引き続き回ってランプピン２３が導電ばね３の凹部１５に当たるまでのトルクであり、回転子２の中心を支える摩擦はごくわずかであり、手の感じでは空回りの状態であり、この状態はランプ挿入位置またはランプ装着位置と同じ感触であるため、挿入位置または装着位置と誤って認識するおそれがある。さらにこの状態のまま通電すると、ランプピンが導電ばね３に触れたときは点灯する可能性があるが、安定した接触力が得られないため、ちらつきや接触不良を生じるので、避けるべき構造である。
【００３６】
この発明の第２の実施の形態を図１１から図１４により説明する。すなわち、第１の実施の形態において、回転子２は略円柱形の部分に肉盗み空間３５を設けている。実施の形態では、肉盗み空間３５の部分だけ材料が少ない肉盗みを形成することにより、回転子２の肉厚が薄くなるので成形時のひけが生じなく、樹脂が少ないので成形サイクルの短縮が図られる。またばね性を有するので導電ばねの凹部１５に嵌まり脱出する際にたわみを生じ凹部１５から脱出容易になる。一方ランプピン２３は図１４に示すようにランプ管４０の端部に設けた板４１に設けており、外力により例えば矢印のようにたわみを生じるので、ランプピン２３と略同様のばね性に合わせることより、ランプ着脱時と似た感触が得られる。また回転子２を回転するときのクリックアクションにより音を発するが肉盗み空間３５により大きくなり、明確に位置を認識できる。
【００３７】
この発明の第３の実施の形態を図１５から図１６に示す。すなわち、第２の実施の形態において、肉盗み空間３５に１または複数の連結壁４２、４３を設けている。図１５は連結壁４２を１個設けて凸部２１のたわみを少なくし、図１６は連結壁４３を２個設けて１個の場合より凸部２１のたわみを増した例である。
【００３８】
【発明の効果】
請求項１記載のランプソケットによれば、ランプピンがランプピン挿通溝に挿脱されるランプの挿入および取外し位置からランプピンが導電ばねに接触するランプピン装着に至るまでのランプの往復回転ともに回転子の円周部が常に導電ばねに接している。回転子の円周面は回転軸と略同心であって導電ばねの内面を一定の直径内の円周上に維持するためトルク変化が小さくできるので、回転子の回転が円滑である。また導電ばねの最大たわみはランプピンの外側が導電ばねの凹部と当たったときであり、最小たわみは回転子の凸部が導電ばねの凹部に嵌まったときであり、この最も中心寄りの位置は回転子の凸部で規制している。したがって、たわみを繰り返す範囲は最大たわみと最小たわみの範囲であるから応力振幅が従来例より狭くなっており繰り返し疲労が少ない。このため、導電ばねのたわみ代が小さくなりばねの繰り返し疲労が少ないため長寿命にできる。さらにランプを挿入する角度およびランプを装着して停止する角度ではトルクがほぼゼロとなり、他の角度ではトルクが必要であるから、停止すべき角度が操作感触でも分かりやすい。
【００４０】
請求項２記載のランプソケットによれば、請求項１と同様な効果がある。
【００４１】
請求項３記載のランプソケットによれば、請求項２と同様な効果がある。
【図面の簡単な説明】
【図１】この発明の第１の実施の形態の分解斜視図である。
【図２】ランプソケットの外形を示す斜視図である。
【図３】ランプピン挿入位置の回転子の正面図である。
【図４】ランプピンが導電ばねに係止した状態の正面図である。
【図５】ランプを回転してランプピンを外しかけた状態の正面図である。
【図６】回転子を４５°回転した状態の正面図である。
【図７】回転子の凸部が導電ばねの凹みから外れた状態の正面図である。
【図８】ランプピン装着状態で回転子の円周が導電ばねにあたらない条件を示す正面図である。
【図９】（ａ）はランプ着脱時のトルクチャート、（ｂ）は回転子に導電ばねが当たる円筒がないもののトルクチャートである。
【図１０】回転子の凸部とランプピンともに導電ばねの凹部から離れた例の正面図である。
【図１１】第２の実施の形態の回転子を示す正面図である。
【図１２】その側面図である。
【図１３】回転子の断面図である。
【図１４】ランプピンの取付部分の断面図である。
【図１５】第３の実施の形態の回転子の正面図である。
【図１６】その変形タイプの正面図である。
【図１７】従来例の回転子の斜視図である。
【図１８】その分解斜視図である。
【図１９】（ａ）、（ｂ）は回転子がランプピン挿入状態にあるランプソケットの正面図、（ｃ）はランプピン装着状態の正面図である。
【図２０】（ａ）は回転子が約４５°回転した状態の正面図、（ｂ）その部分拡大図、（ｃ）はその一部の説明図である。
【図２１】従来例のランプソケットの斜視図である。
【図２２】他の従来例のランプソケットを示し、（ａ）はソケット本体の斜視図、（ｂ）は回転子を裏面側から見た斜視図である。
【図２３】（ａ）は半断面図、（ｂ）はカバーに反りが生じた状態の断面図、（ｃ）は回転子が凹凸係合している状態の部分断面図、（ｄ）は回転子の凹凸係合が外れている状態の部分断面図である。
【符号の説明】
１ソケット本体
２回転子
３導電ばね
４穴部
５ランプピン挿通溝
１５凹部
１６速結端子部
２０ランプピン案内凹部
２１凸部
２２凹み
２３ランプピン
２７欠除部
３５肉盗み空間
４２連結壁
４３連結壁[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lamp socket of a straight tube lamp applied to a lighting fixture such as a straight tube fluorescent lamp.
[0002]
[Prior art]
A socket body with a hole for inserting the lamp pin of a straight tube lamp in the front and a lamp pin insertion groove extending from the inner peripheral surface to the outer surface of the hole is formed on the front surface, and the lamp pin is inserted into the hole so that it can rotate freely. A lamp pin guide recess that is connected to the groove and guides one of the lamp pins is formed in the diameter direction of the front surface, and is arranged so as to face the rotor rotating in accordance with the rotation of the straight tube lamp and the circumferential surface of the rotor in the hole. There is a sandwich-type lamp socket provided with a pair of conductive springs that are provided and contact the peripheral surface of the lamp pin.
[0003]
In the first conventional example (for example, Japanese Utility Model Publication No. 50-10695), a plurality of notches are formed along the outer peripheral edge of the bottom of the rotor in order to position the rotation position of the rotor, and the protrusions elastically engage with the notches. The part is formed on the elastic back plate of the lamp socket.
[0004]
In the second conventional example (for example, Japanese Utility Model Publication No. 50-10696), a large number of concave portions are arranged in a circle on the back surface of the rotor, and a sphere and a spring that fit into the concave portions are placed in the back plate of the lamp socket.
[0005]
In the third conventional example (for example, Japanese Patent Application Laid-Open No. 59-40479), a large number of recesses are provided in the circumferential direction of the rotor, and protrusions are provided on the back plate so that the protrusions can be engaged and disengaged by elastic deformation of the rotor. .
[0006]
In the fourth conventional example (Japanese Patent Laid-Open No. 8-167459), protrusions are provided on the inner peripheral surface of a cylindrical rotor, and engaging recesses are formed in a pair of struts that support the rotor, and the struts are elastically deformed in the radial direction. It is possible.
[0007]
A fifth conventional example is shown in FIGS. That is, in FIGS. 17 and 18, 100 is a body, 101 is a rotor composed of two substantially prismatic portions 101b erected on a disc 101a, 102 is an insulating back plate, 103 is a conductive spring , and 104 is an insulating back. The face plate 102 is fixed to the body 100, 105 is a lead wire connected to the conductive spring 103, 107 is a lamp pin insertion groove, 108 is a lamp pin guide recess, and 109 is a hole. FIGS. 19A and 19B show a state in which the lamp pin can be inserted, and the conductive spring 103 is elastically in contact with both sides of the rotor 101. FIG. 20 shows a state in which the rotor 101 is rotated by about 45 °, and the corner 101 c of the rotor 101 is engaged with the shallow V-shaped recess 103 a of the conductive spring 103 as shown in FIG. FIG. 19C shows a state in which the lamp pin 106 is in contact with the recess 103 a of the conductive spring 103.
[0008]
A sixth conventional example is shown in FIGS. A pair of substantially semi-cylindrical portions 110 are erected in the hole 109 of the body 100 to form a circumferential groove 111 on the outer periphery of the end, and at a position inclined by about 45 ° from the lamp pin insertion groove 107 communicating with the hole 109. An L-shaped slit 112 is cut from the hole 109 to form an elastic piece 113 inside, and a chevron projection 114 is formed at the tip of the elastic piece 113. The rotor 101 has a cylindrical portion 115 that is fitted around the substantially semi-cylindrical portion 110, and the cylindrical portion 115 has a protrusion 116 that engages with the circumferential groove 111, and the flange 117 of the rotor 101 is formed on the front surface of the body 100. 4 dents 120 are provided on the back surface of the flange 117 at intervals of 90 degrees, and the position where the chevron 114 of the body 100 fits into the dent 120 can be inserted or removed or the lamp is in use. It is the position set to. Reference numeral 121 denotes a cover on the back surface of the body 100.
[0009]
[Problems to be solved by the invention]
In the first conventional example, the elastic deformation of the back insulating plate made of synthetic resin is used for the rotational resistance of the rotor. Therefore, the back insulating plate has a high bending elastic modulus and is unlikely to sag due to rotating pressure. This can be realized by using a material that hardly causes creep deformation (sagging) even at a high temperature during use. As a material that meets this requirement, polycarbonate is a typical thermoplastic resin, but the unit price is higher than that of general-purpose materials such as polypropylene and nylon. Further, thermosetting resins have low productivity and have the disadvantage of cracking when a strong force is applied. In addition, if the rear insulating plate is expected to be deformed rearward, when mounting the lighting fixtures in a row, the gap between the backs of the lamp sockets of adjacent lighting fixtures must be increased, and the portion becomes wider. there is a dark Kunar disadvantages.
[0010]
In the second conventional example, since the spring and the sphere are arranged between the rotor and the back plate of the lamp socket, the thickness of the lamp socket is increased correspondingly, and the size cannot be reduced, and the cost of parts is high.
[0011]
As in the first conventional example, the third conventional example is limited in materials used such as polycarbonate , and the unit price is high.
[0012]
The unit price of the fourth conventional example is high as in the first conventional example.
[0013]
In the fifth conventional example, as shown in FIG. 20B, the position of the rotor 100 is more approximate than the position A ′ where the inner surface of the recess 103a of the conductive spring 103 is in contact with the circular outer peripheral surface of the disc 101a of the rotor 100. The positions B ′ at both ends of the corner 101c of the prismatic portion 101b are closer to the X axis. Accordingly, the outer peripheral surface of the corner 101c of the prismatic portion 101b of the rotor 101 indicated by Lb completely fits into the V-shaped valley of the concave portion 103a of the conductive spring 103 indicated by La as shown in FIG. As a result, this state occurs at a position of about 45 ° if the lamp is rotated to attach or remove the lamp, and the rotational torque increases at an intermediate point when rotated by 90 °. For this reason, the rotation at the time of lamp mounting is not smooth, and there is a drawback that it is mistaken for the correct lamp mounting position.
[0014]
In the sixth conventional example, as shown in FIG. 23 (b), when the cover 121 is displaced inward by X 'due to warpage or deformation, the distance y' between the contact surfaces of the rotor 101 and the body 100 increases, and the mountain shape is obtained. The click feeling and torque due to engagement / disengagement of the protrusion 114 and the recess 120 are weakened. For this reason, the dimensional accuracy of parts and the difficulty of deformation are required. In order to prevent this and to prevent sagging due to repetition, the body 100 is made of polycarbonate which is difficult to sag with high modulus of elasticity and is hard to scrape and wear, and the rotor 101 contains glass fiber which obtains heat resistance and high modulus of elasticity. Since polybutylene terephthalate is used, the material becomes expensive.
[0015]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a lamp socket that can smoothly rotate the rotor, has a good click feeling, and can be manufactured at a low cost.
[0016]
[Means for Solving the Problems]
The lamp socket according to claim 1, wherein a socket body having a hole portion into which a lamp pin of a straight tube lamp is inserted on the front surface and a lamp pin insertion groove extending from an inner peripheral surface of the hole portion to an outer surface is formed on the front surface; A rotor that is rotatably mounted in the hole and is formed with a lamp pin guide recess extending in the diametrical direction so as to guide one of the lamp pins in a manner connected to the lamp pin insertion groove, and to rotate in accordance with the rotation of the straight tube lamp; A sandwiching lamp socket provided with a pair of conductive springs disposed so as to face the peripheral surface of the rotor in the hole and contacting the peripheral surface of the lamp pin by rotation of the straight tube lamp. There,
The conductive spring has a recess that engages with the lamp pin at the mounting position of the lamp pin;
The rotor has a substantially cylindrical shape whose diameter is smaller than the length between the outermost surfaces of a pair of lamp pins of the straight tube lamp and whose outer periphery is elastically contactable with the conductive spring, and the lamp pin guide recess is the lamp pin A convex portion that engages with the concave portion when connected to the insertion groove, and a portion other than the concave portion of the conductive spring does not contact the rotor when the convex portion is engaged with the concave portion. There are dents on both sides of the convex part, and in this case, the tip of the convex part is the same height as the circumferential surface of the rotor,
In the state where the lamp pin is engaged with the concave portion of the conductive spring, there is a planar notch on both sides of the lamp pin of the rotor so that portions other than the concave portion of the conductive spring do not contact the rotor. And
In the state in which the concave portion and the notch portion are removed from the concave portion of the conductive spring by the rotation of the rotor, both the opening edges of the concave portion of the conductive spring are in the rotor. It is characterized in that it is always in elastic contact with the peripheral surface, and when the lamp pin or the convex portion is in contact with one of both opening edges of the concave portion, the other is in contact with the peripheral surface of the rotor. To do.
[0017]
According to the lamp socket of the first aspect, both the reciprocating rotation of the lamp from the insertion and removal position of the lamp where the lamp pin is inserted into and removed from the lamp pin insertion groove to the mounting of the lamp pin where the lamp pin comes into contact with the conductive spring, The circumference is always in contact with the conductive spring. Since the circumferential surface of the rotor is substantially concentric with the rotation axis and the inner surface of the conductive spring is maintained on the circumference within a certain diameter, the torque change can be reduced, so that the rotation of the rotor is smooth. The maximum deflection of the conductive spring is when the outside of the lamp pin hits the concave portion of the conductive spring, and the minimum deflection is when the convex portion of the rotor fits into the concave portion of the conductive spring. It is regulated by the convex part of the rotor. Therefore, since the range where the deflection is repeated is the range of the maximum deflection and the minimum deflection, the stress amplitude is narrower than that of the conventional example, and the repeated fatigue is small. For this reason, the bending allowance of the conductive spring is reduced, and the repeated fatigue of the spring is small, so that a long life can be achieved. Further, since the torque is almost zero at the angle at which the lamp is inserted and the angle at which the lamp is mounted and stopped, and the torque is required at other angles, the angle to be stopped is easy to understand from the operation feeling.
[0020]
A lamp socket according to a second aspect is the lamp socket according to the first aspect, wherein the rotor has a meat stealing space recessed in a substantially cylindrical portion.
[0021]
According to the lamp socket of the second aspect, the same effect as the first aspect is obtained.
[0022]
A lamp socket according to a third aspect is the lamp socket according to the second aspect , wherein one or more connecting walls are provided in the meat stealing space.
[0023]
According to the lamp socket of the third aspect, the same effect as the second aspect is obtained.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
A first embodiment of the present invention will be described with reference to FIGS. That is, it is a sandwich lamp lamp, and has a socket body 1, a rotor 2, and a conductive spring 3.
[0025]
The socket body 1 has a hole portion 4 for inserting a lamp pin of a straight tube lamp such as a straight tube fluorescent lamp on the front surface, and a lamp pin insertion groove 5 extending from the inner peripheral surface of the hole portion 4 to the outer surface is formed on the front surface. The lamp pin insertion groove 5 is formed at the apex on the side opposite to the wire lead-out holes 6 and 7. In the embodiment, it comprises a pair of front cover 8 and rear cover 9, which are fitted to each other and attached to the combination mounting holes 10, 11 through mounting tools (not shown). The front cover 8 has a hole portion 4 and a lamp pin insertion groove 5, and the rear cover 9 is provided with a substantially cylindrical portion 12 erected at the center position of the hole portion 4 when the front cover 8 is put together. A peripheral groove 13 is formed on the outer periphery of the lamp pin , and the split groove 14 is formed in the longitudinal direction of the lamp pin insertion groove 5 . The wire lead-out holes 6 and 7 are formed at positions where the phases match. Reference numeral 17 denotes an electric wire release hole, 18 denotes a conductive spring locking groove, and 19 denotes a quick connection terminal portion positioning recess.
[0026]
The pair of conductive springs 3 are disposed so as to face the peripheral surface of the rotor 2 in the hole 4 and come into contact with the peripheral surface of the lamp pin by the rotation of the straight tube lamp. The conductive spring 3 has a concave portion 15 that is engaged with the lamp pin at the mounting position of the lamp pin. In the embodiment, it is formed by a strip-shaped plate spring, and the quick connection terminal portion 16 is integrally formed at the base end portion corresponding to the wire lead-out holes 6 and 7. The leading end of the conductive spring 3 is locked in the conductive spring locking groove 18, the quick connection terminal portion 16 is positioned in the quick connection terminal portion positioning recess 19, and the conductive spring 3 is supported at both ends.
[0027]
The rotor 2 is rotatably mounted in the hole 4 and is connected to the lamp pin insertion groove 5 to form a lamp pin guide recess 20 extending in the diametrical direction so as to guide one of the lamp pins. Rotate together. The rotor 2 has a substantially cylindrical shape whose outer periphery elastically contacts the conductive spring 3, and has a convex portion 21 that engages with the concave portion 15 of the conductive spring 3 when the lamp pin guide concave portion 20 is connected to the lamp pin insertion groove 5, and Recesses 22 are formed in both side portions of the convex portion 21 so that portions other than the concave portion 15 of the conductive spring 3 do not contact the rotor 2 in a state where the convex portion 21 is engaged with the concave portion 15. The diameter of the rotor 2 is substantially the same as the length between the outermost surfaces of a pair of lamp pins of a straight tube lamp, for example, as shown in FIG.
[0028]
In the embodiment, the substantially cylindrical shape of the rotor 2 is a cylindrical body, a flange 31 that fits into the hole 4 is formed at an end thereof, and the circumferential groove 13 is slidable on the inner peripheral surface of the cylindrical body. The engaging ridge 32 is formed. Further, when the rotor 2 fits the convex portion 21 of the rotor 2 into the concave portion 15 of the conductive spring 3 and spreads the conductive spring 3 by the convex portion 21, the concave portion 22 that partially dents the circumferential portion of the rotor 2. Is formed so that portions other than the concave portion 15 of the conductive spring 3 do not hit. With the same aim as the recess 22, notches 27 are provided in the vicinity of the lamp pin guide recess 20 on the circumference of the rotor 2, that is, on both sides of the groove 26 through which the lamp pin 23 passes. The circumferential portion of the rotor 2 is substantially concentric with the center of rotation, and the diameter Φ of the cylindrical surface is within the outer dimension ΦD of the two lamp pins of the compatible lamp cap, and is always in contact with the inner surface of the conductive spring 3. The conditions for determining the diameter Φ 2 of the rotor 2 and the dimensions of the recess 22 and the notch 27 are as follows.
[0029]
That is, condition 1 is a state in which the lamp is rotated counterclockwise as shown by an arrow in FIG. 5, and one of the opening edges of the recess 15 of the conductive spring 3 fits into the notch 27 of the rotor 2. The condition for preventing the rotational force from changing (becomes hard) by this is A ≦ B. As shown in FIG. 5, the circumference of the rotor 2 is in contact with the conductive spring 3 immediately before the lamp pin 23 is separated from the recess 15. At this time, A is the dimension in the Y direction from the X axis to the corner of the rotor (the connection portion between the circumferential surface and the notch 27 ), and B is the conductive spring 3 from the X axis that hits the circumferential surface of the rotor 2. It is the Y direction dimension up to now.
[0030]
Condition 2 is a state in which the rotor 2 is rotated by 45 ° from the lamp mounting position of the rotor 2 as shown in FIG. C is the length of the chord on the circumferential surface of the rotor 2 (the length between the recess 22 and the notch 27 ), and D is the length of the conductive spring 3 that is in contact with the circumferential surface of the rotor 2 as shown in FIG. This is the distance between both opening edges of the recess 15 .
[0031]
Condition 3 is a state in which the convex portion 21 of the rotor 2 is disengaged from the concave portion 15 of the conductive spring 3 as shown in FIG. E is the length of the concave portion 22 of the rotor 2 (the length from the circumferential portion on one side of the convex portion 21 until the concave portion 22 starts and ends).
[0032]
Condition 4 is a condition for preventing the circumference of the rotor 2 from hitting the conductive spring 3 when the lamp pin 23 is mounted, as shown in FIG . Even when the right turning force is applied to the rotor 2 from the state shown in FIG. 4 where the lamp pin 23 is attached, the conductive spring 3 is not pushed by the rotor 2. That is, the first is that the circumferential angle portion (connection portion between the circumferential surface and the cutout portion 27 ) 25 of the rotor 2 is separated from the conductive spring 3. Second, the side surface of the lamp pin guide recess 20 through which the lamp pin 23 of the rotor 2 passes is in contact with the lamp pin 23. Third, the condition that the lamp pin 23 is close to the lower end of the concave portion 15 of the conductive spring 3 by the right rotational force is satisfied.
[0034]
FIG. 9A is a torque chart when the lamp of the present invention is attached and detached, and FIG. 9B is a torque chart when there is no cylinder in which the conductive spring 3 hits the rotor 2 as shown in FIG. ). It is not an invention which may cause problems for a similar feel and angle to be stopped in the middle of the rotation occurs.
[0035]
In the figure, (1) is when the rotor 2 is at the lamp insertion position, (2) is when the rotor 2 is at a position rotated 90 degrees from (1) (with the lamp mounted), and A and C are A peak of torque when the convex portion 21 of the rotor 2 pushes the conductive spring 3 outward, B and D are peaks when the lamp pin 23 pushes the conductive spring 3 outward, and E is a circle of the rotor 2. Torque with the conductive spring 3 pinching around the circumference, F is a state where the convex portion 21 and the lamp pin 23 of the rotor 2 are both separated from the concave portion 15 of the conductive spring 3, and G is a state where the rotor 2 or the lamp pin 23 is conductive. The torque is negatively rotated by the squeezing force of the spring 3. E in FIG. 9A is a torque after the convex portion 21 of the rotor 2 is detached from the concave portion 15 of the conductive spring 3, and the rotor receives the force of the conductive spring 3 squeezing around the circumference of the rotor 2. Since 2 turns, there is a change in value. For this reason, since the friction always occurs, the torque does not become zero to negative, so that this position is not erroneously recognized as the lamp insertion position (angle) or the lamp mounting position. On the other hand, F in FIG. 9B is the torque from when the convex portion 21 of the rotor 2 is removed from the concave portion 15 of the conductive spring 3 to when the lamp pin 23 hits the concave portion 15 of the conductive spring 3. Friction that supports the center of 2 is negligible, and it is an idle state in the hand feeling. This state is the same feeling as the lamp insertion position or the lamp mounting position, and may be erroneously recognized as the insertion position or the mounting position. There is. Further, if the power is supplied in this state, the lamp pin may be lit when it touches the conductive spring 3, but since a stable contact force cannot be obtained, flickering or poor contact is caused, so this structure should be avoided.
[0036]
A second embodiment of the present invention will be described with reference to FIGS. That is, in the first embodiment, the rotor 2 is provided with the meat stealing space 35 in a substantially cylindrical portion. In the embodiment, the thickness of the rotor 2 is reduced by forming the meat steal with only a portion of the meat stealing space 35, so that the thickness of the rotor 2 is reduced, so that there is no sink at the time of molding, and the molding cycle is shortened because there is less resin. Figured. Further, since it has a spring property, it is bent when it is fitted into the recess 15 of the conductive spring to escape, and it is easy to escape from the recess 15. On the other hand, the lamp pin 23 is provided on a plate 41 provided at the end of the lamp tube 40 as shown in FIG. 14 and is bent by an external force, for example, as indicated by an arrow. A feeling similar to that when the lamp is attached / detached is obtained. Further, although a sound is generated by a click action when the rotor 2 is rotated, the sound is increased by the meat stealing space 35 and the position can be clearly recognized.
[0037]
A third embodiment of the present invention is shown in FIGS. That is, in the second embodiment, one or more connecting walls 42 and 43 are provided in the meat stealing space 35. 15 shows an example in which one connecting wall 42 is provided to reduce the deflection of the convex portion 21, and FIG. 16 is an example in which the deflection of the convex portion 21 is increased as compared with the case where two connecting walls 43 are provided.
[0038]
【The invention's effect】
According to the lamp socket of the first aspect, both the reciprocating rotation of the lamp from the insertion and removal position of the lamp where the lamp pin is inserted into and removed from the lamp pin insertion groove to the mounting of the lamp pin where the lamp pin comes into contact with the conductive spring, The circumference is always in contact with the conductive spring. Since the circumferential surface of the rotor is substantially concentric with the rotation axis and the inner surface of the conductive spring is maintained on the circumference within a certain diameter, the torque change can be reduced, so that the rotation of the rotor is smooth. The maximum deflection of the conductive spring is when the outside of the lamp pin hits the concave portion of the conductive spring, and the minimum deflection is when the convex portion of the rotor fits into the concave portion of the conductive spring. It is regulated by the convex part of the rotor. Therefore, since the range where the deflection is repeated is the range of the maximum deflection and the minimum deflection, the stress amplitude is narrower than that of the conventional example, and the repeated fatigue is small. For this reason, the bending allowance of the conductive spring is reduced, and the repeated fatigue of the spring is small, so that a long life can be achieved. Further, since the torque is almost zero at the angle at which the lamp is inserted and the angle at which the lamp is mounted and stopped, and the torque is required at other angles, the angle to be stopped is easy to understand from the operation feeling.
[0040]
According to the lamp socket of the second aspect, the same effect as the first aspect is obtained.
[0041]
According to the lamp socket of the third aspect, the same effect as the second aspect is obtained.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a first embodiment of the present invention.
FIG. 2 is a perspective view showing an outer shape of a lamp socket.
FIG. 3 is a front view of a rotor at a lamp pin insertion position.
FIG. 4 is a front view of a state in which a lamp pin is locked to a conductive spring.
FIG. 5 is a front view of a state in which the lamp is rotated and the lamp pin is about to be removed.
FIG. 6 is a front view showing a state in which a rotor is rotated by 45 °.
FIG. 7 is a front view showing a state in which the convex portion of the rotor is removed from the recess of the conductive spring.
FIG. 8 is a front view showing a condition where the circumference of the rotor does not hit the conductive spring when the lamp pin is mounted.
FIG. 9A is a torque chart when the lamp is attached and detached, and FIG. 9B is a torque chart when the rotor does not have a cylinder that contacts the conductive spring.
FIG. 10 is a front view of an example in which both the convex portion of the rotor and the lamp pin are separated from the concave portion of the conductive spring.
FIG. 11 is a front view showing a rotor according to a second embodiment.
FIG. 12 is a side view thereof.
FIG. 13 is a cross-sectional view of a rotor.
FIG. 14 is a cross-sectional view of a lamp pin mounting portion.
FIG. 15 is a front view of a rotor according to a third embodiment.
FIG. 16 is a front view of the modified type.
FIG. 17 is a perspective view of a conventional rotor.
FIG. 18 is an exploded perspective view thereof.
FIGS. 19A and 19B are front views of the lamp socket in which the rotor is in the lamp pin insertion state, and FIG. 19C is a front view of the lamp pin mounted state;
20A is a front view showing a state where the rotor is rotated about 45 °, FIG. 20B is a partially enlarged view thereof, and FIG. 20C is a partial explanatory view thereof.
FIG. 21 is a perspective view of a conventional lamp socket.
22A and 22B show another conventional lamp socket, in which FIG. 22A is a perspective view of a socket body, and FIG. 22B is a perspective view of a rotor as viewed from the back side.
23A is a half cross-sectional view, FIG. 23B is a cross-sectional view with the cover warped, FIG. 23C is a partial cross-sectional view with the rotor engaged in a concave-convex engagement, and FIG. It is a fragmentary sectional view in the state where concavo-convex engagement of a rotor has come off.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Socket main body 2 Rotor 3 Conductive spring 4 Hole part 5 Lamp pin insertion groove 15 Recess 16 Fast-connection terminal part 20 Lamp pin guide recessed part 21 Projection part 22 Recess 23 Lamp pin 27 Deletion part 35 Meat stealing space 42 Connection wall 43 Connection wall

Claims

A socket body having a hole portion for inserting a lamp pin of a straight tube lamp on the front surface and a lamp pin insertion groove extending from the inner peripheral surface of the hole portion to the outer surface is formed on the front surface, and is mounted rotatably in the hole portion. A rotator rotating in accordance with the rotation of the straight tube lamp by forming a lamp pin guide recess extending in the diametrical direction so as to guide one of the lamp pins in a row with the lamp pin insertion groove, and a rotor of the rotor in the hole A sandwich type lamp socket provided with a pair of conductive springs arranged so as to face the peripheral surface and in contact with the peripheral surface of the lamp pin by rotation of the straight tube lamp;
The conductive spring has a recess that engages with the lamp pin at the mounting position of the lamp pin;
The rotor has a substantially cylindrical shape whose diameter is smaller than the length between the outermost surfaces of a pair of lamp pins of the straight tube lamp and whose outer periphery is elastically contactable with the conductive spring, and the lamp pin guide recess is the lamp pin A convex portion that engages with the concave portion when connected to the insertion groove, and a portion other than the concave portion of the conductive spring does not contact the rotor when the convex portion is engaged with the concave portion. There are dents on both sides of the convex part, and in this case, the tip of the convex part is the same height as the circumferential surface of the rotor,
In the state where the lamp pin is engaged with the concave portion of the conductive spring, there is a planar notch on both sides of the lamp pin of the rotor so that portions other than the concave portion of the conductive spring do not contact the rotor. And
In the state in which the concave portion and the notch portion are removed from the concave portion of the conductive spring by the rotation of the rotor, both the opening edges of the concave portion of the conductive spring are in the rotor. It is characterized in that it is always in elastic contact with the peripheral surface, and when the lamp pin or the convex portion is in contact with one of both opening edges of the concave portion, the other is in contact with the peripheral surface of the rotor. Lamp socket to be used.

The lamp socket according to claim 1, wherein the rotor has a meat stealing space recessed in a substantially cylindrical portion .

The lamp socket according to claim 2, wherein one or more connecting walls are provided in the meat stealing space .