JP3867040B2

JP3867040B2 - Lamp socket and lighting apparatus using the same

Info

Publication number: JP3867040B2
Application number: JP2002311915A
Authority: JP
Inventors: 雅章磯田; 篤司佐藤
Original assignee: Matsushita Electric Works Ltd
Current assignee: Panasonic Electric Works Co Ltd
Priority date: 2002-10-25
Filing date: 2002-10-25
Publication date: 2007-01-10
Anticipated expiration: 2022-10-25
Also published as: JP2004146277A

Description

【０００１】
【発明の属する技術分野】
本発明は、高出力形の直管形蛍光ランプが装着されるランプソケット及びそれを用いる照明器具に関するものである。
【０００２】
【従来の技術】
この種のランプソケットとしては、例えば図１３（ａ）（ｂ）に示すような構造を有するものが従来より提供されている（特許文献１参照）。
【０００３】
このランプソケットは、後面が開口した略箱状であって前面に蛍光ランプの口金が挿入されるランプ挿入孔が設けられたボディ５１と、ボディ５１の開口を塞ぐようにしてボディ５１に被着されるカバー５２とで構成されるソケット本体５０を有し、ソケット本体５０の内部にはランプピンに接触するとともに、基端にリード線が接続された導電金具（図示せず）が収納されている。
【０００４】
カバー５２の後面の上部には貫通孔５３が貫設され、下部の左右両側には突起５４，５４が突設されている。また、ボディ５１には、カバー５２の貫通孔５３に連通する挿通孔５５が貫設されている。
【０００５】
而して、このランプソケットを照明器具の器具本体に固定された取付板６０に取り付ける際には、ボディ５１の挿通孔５５とカバー５２の貫通孔５３とに挿通したねじ５６の先端を取付板６０に設けた孔６１に通してナット５７に螺合することで、ソケット本体５０を取付板６０にねじ５６で締め付けて固定している。この時、突起５４の先端が取付板６０に設けた孔（図示せず）と嵌合し、ソケット本体５０の回転止めが行われる。
【０００６】
【特許文献１】
特開平１０−１４９７１７号公報（第３頁及び第４図、第５図）
【０００７】
【発明が解決しようとする課題】
ところで、片口金形の蛍光ランプが装着されるランプソケットでは蛍光ランプを片持ち支持しているので、受金が蛍光ランプの口金を保持する力を大きくとる必要があり、その結果ランプ側に引っ張られる方向（この方向をランプ引張り方向と言う。）に加わる力が大きくなって、ランプ引張り方向の取付強度を充分に確保する必要がある。それに対して、両口金形の直管形蛍光ランプが装着されるランプソケットでは蛍光ランプを両側から支持しているので、片口金形の蛍光ランプが装着されるランプソケットに比べて、受金が口金を保持する力を小さくでき、したがってランプ引張り方向に加わる力が小さくなり、ランプ引張り方向の取付荷重が小さくて済むが、蛍光ランプを回転させるような力が加わる場合があるので、蛍光ランプの回転方向への取付強度を十分に確保する必要がある。
【０００８】
上述した従来のランプソケットでは、１本のねじ５６でソケット本体５０を取付板６０に締付固定しているため、蛍光ランプの回転方向への取付強度を大きくとるためには、ねじサイズを大きくして、ねじ５６による締付力を大きくする必要があり、その結果ソケット本体５０が大型化するという問題があった。
【０００９】
また、蛍光ランプを回転させるような力が加わると、ねじ５６を中心にソケット本体５０を回転させるような力がソケット本体５０に加わるが、カバー５２の２個の突起５４が取付板６０の孔と嵌合することで、ソケット本体５０の回転止めを行っているので、ねじ５６の締付時やソケット取付後に蛍光ランプを回転する力がかかった場合に２個の突起５４に荷重が集中して、突起５４が破壊する虞もあった。また、上述のランプソケットでは、ソケット本体５０を取付板６０にねじ止めする際に、ソケット本体５０を取付板６０に仮止めする構造となっていないため、取付作業がやりにくいという問題もあった。
【００１０】
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、取付部位に確実に取り付けることができる小型のランプソケット及びそれを用いる照明器具を提供することにある。
【００１１】
【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、両端に口金を有する直管形の蛍光ランプが装着されるランプソケットであって、蛍光ランプの口金を受ける受金が前面に設けられた樹脂製のソケット本体と、ソケット本体の内部に収納され給電線が接続されるとともに口金が備える接触片に電気的に接続される導電部材とを備え、ソケット本体を板状の取付部位に取り付けるための取付手段をソケット本体の後面側に設け、該取付手段を、ソケット本体の後壁に設けたスリットによって一端側を除いて後壁から分離され、他端部が前後方向において撓み自在に形成された撓み片と、撓み片の他端部から後方に向かって突出し取付部位に設けた被係止凹部と係止する係止突起と、それぞれソケット本体の後面から後方に突出し、取付部位に設けた貫通孔に挿入されて貫通孔の縁と当接することにより回り止めを行う一対の位置規制突起と、各位置規制突起の先端部から側方に突出し、ソケット本体の後壁との間で取付部位を挟持する一対の挟持用突起とで構成するとともに、ソケット本体の後壁に、取付部位に設けた挿通孔に通した取付ねじが螺合するねじ穴を設け、当該ねじ穴を中心とする同一半径の円周上に、係止突起と一対の位置規制突起とを等間隔に配置したことを特徴とする。
【００１３】
請求項２の発明では、請求項１の発明において、ソケット本体の内部に撓み片の周りを囲む袋状の隔壁を形成したことを特徴とする。
【００１４】
請求項３の発明では、両端に口金を有する直管形の蛍光ランプと、蛍光ランプの口金が装着される請求項１又は２の何れか１つに記載のランプソケットと、ランプソケットを保持する器具本体と、器具本体に取り付けられてランプソケットに装着される蛍光ランプを点灯させる安定器とを備えて成ることを特徴とする。
【００１５】
【発明の実施の形態】
本実施形態の照明器具は、図１０〜図１２に示すように、両端にＲ１７ｄ（ＪＩＳＣ７７０９−１参照）と呼ばれる口金４１を有する高出力タイプの直管形の蛍光ランプ４０，４０と、各蛍光ランプ４０の軸方向に沿って一対ずつ配置され口金４１と嵌合する受金を具備したランプソケット（可動形ランプソケット１及び固定形ランプソケット１’）と、２組のランプソケット１，１’を保持する器具本体２０と、器具本体２０に取り付けられて各組のランプソケット１，１’に装着される蛍光ランプ４０，４０を点灯させる安定器３０とを備える。
【００１６】
先ず可動形ランプソケット（以下、ランプソケットと略す）１の構造について図１〜図８に基づいて説明する。尚、以下の説明では特に断りが無い場合、図３（ａ）の向きにおいて上下左右の方向を規定し、また図３（ａ）における正面を前面という。したがって、図３（ｂ）における右端は後端になる。
【００１７】
このランプソケット１は、図２に示すように、後面が開口した箱形のボディ３及びボディ３の開口面に被着されるカバー４からなるソケット本体２を備え、ソケット本体２の内部には蛍光ランプ４０の口金４１を受ける受金５が納装されている。
【００１８】
ボディ３は、受金５を前後動自在に保持する略円筒状の主部３ａと、主部３ａの後部側から下方に突出する突出部３ｂとが一体に形成された合成樹脂成型品からなり、主部３ａの前面にはプランジャ６が前後動自在に挿通する略十字形の挿通孔３ｃが開口している。また、突出部３ｂの左右両側壁の後縁からは、断面Ｌ字形であって先端が外側に向かって突出し、カバー４の後面との間で後述する器具本体２０の取付板２４を挟持する挟持片１１，１１が一体に突設されている。
【００１９】
カバー４は合成樹脂成型品からなり、ボディ３の主部３ａ並びに突出部３ｂの開口面を塞ぐような形状に形成され、前面の上部には後述する端子金具９のばね座片９ａとコイルばね８の後端部とが挿入される一対のばね保持溝４ａが設けられ、前面の下部にはボディ３の突出部３ｂ内に進出する一対の突台部４ｂが突設されている。カバー４の後面の上部には、後壁に設けたスリット４ｄによって一端側を除いて後壁から分離された舌状の撓み片１２が形成され、撓み片１２の他端部は前後方向において撓み自在となっており、撓み片１２の他端部後面には取付板２４の係止孔２６（被係止凹部）と係止する係止突起１２ａが後方に向かって突設されている。また、カバー４の後面略中央には、図７及び図８に示すように上述した撓み片１２の係止突起１２ａ及び挟持片１１，１１から略等距離の位置に、組立ねじが螺合するねじ穴１３が形成されている。すなわち、係止突起１２ａ及び挟持片１１，１１はねじ穴１３を中心とする略同一半径の円周上に略等しい間隔で配置されている。尚、カバー４の左右両側縁には、ボディ３の挟持片１１，１１に対応する部位に挟持片１１，１１を逃がすための切欠４ｅ，４ｅを設けてある。
【００２０】
プランジャ６は合成樹脂成型品からなり、平面視略十字形の有底筒状の主部６ａと、主部６ａの後端部に形成された鍔部６ｂとを有し、主部６ａの内側に受金５が設けられている。受金５は、前面に開口し口金４１の前端部から突出する嵌合部４２が嵌合する嵌合凹所５ａと、嵌合凹所５ａの底面中央より前方へ突出する平面視略エ字形のガイド部５ｂと、嵌合凹所５ａの底面に設けられた一対の挿通孔（図示せず）に後方からそれぞれ挿通される接触端子７，７とを具備する。
【００２１】
接触端子７は金属部材により略十字形に形成され、上記挿通孔から嵌合凹所５ａ内に挿入されるコンタクト部７ａが、ガイド部５ｂの両側面の縦溝５ｃに収納保持される。一方、上記挿通孔よりプランジャ６の後方に突出する接触端子７の後端部７ｂにはコイルばね８の前端部が挿入される。
【００２２】
コイルばね８の後端部は端子金具９のばね座片９ａとともにカバー４のばね保持溝４ａ内に挿入される。端子金具９は金属板に抜き加工且つ曲げ加工を施して形成され、略円形のばね座片９ａと、外部電線が接続される速結端子部９ｂと、ばね座片９ａと速結端子部９ｂとの間を連結する連結片９ｃとを有する。そして、端子金具９をカバー４に取り付けた状態では、ばね座片９ａがばね保持溝４ａの底部に配置されるとともに、速結端子部９ｂが突台部４ｂの前面側に載置される。ばね座片９ａの略中央には孔９ｆが貫設されており、この孔９ｆがばね保持溝４ａの底壁に設けた突起（図示せず）に嵌り込むことで、ばね座片９ａの位置決めが行われるようになっている。この時、コイルばね８の後端部がばね座片９ａと接触し、接触端子７と端子金具９とがコイルばね８を介して電気的に接続される。ここに、２組の接触端子７、コイルばね８、及び端子金具９から蛍光ランプ４０の口金４１が備える接触片（図示せず）と給電線の間を電気的に接続する導電金具１０が構成される。
【００２３】
端子金具９の速結端子部９ｂは平面視略コ字形であって、ボディ３の左右の側壁に沿って配置される当接片９ｄと、当接片９ｄとの間で給電線の芯線を挟持する鎖錠片９ｅとを有している。鎖錠片９ｅは切り起こしによって形成され、先端に行くほどボディ３の下壁から遠ざかる向きに傾斜しており、先端縁が当接片９ｄと対向している。ボディ３の下壁には、当接片９ｄと鎖錠片９ｅとの対向部位に対応して電線挿通孔３ｄが一対ずつ設けられており、この電線挿通孔３ｄから給電線（図示せず）の被覆が剥かれた芯線を挿入すると、鎖錠片９ｅと当接片９ｄとの間に芯線の導体が挟持され、鎖錠片９ｅの先端縁が芯線の導体に食い込むことによって、芯線の脱落が防止されるようになっている。すなわち、電線挿通孔３ｄに給電線の芯線を挿入するだけで、芯線が保持されるとともに、端子金具９への電気的接続がなされるのである。また、ボディ３の下壁には各電線挿通孔３ｄに対応して電線外し孔３ｅが設けられており、速結端子部９ｂに接続された給電線の芯線を外す場合には、対応する電線外し孔３ｅから工具を挿入して、工具の先端で鎖錠片９ｅを上側に押圧すると、鎖錠片９ｅが当接片９ｄから離れる方向に撓められるので、鎖錠片９ｅが芯線の導体から離れて、給電線を容易に引き抜くことができる。
【００２４】
次にランプソケット１を組み立てる手順について以下に簡単に説明する。先ずプランジャ６の主部６ａをボディ３の挿通孔３ｃに後方から挿通し、接触端子７、コイルばね８及び端子金具９を内部に納装した後に、ボディ３の開口面にカバー４を被着し、カバー４の組立爪４ｃをボディ３の嵌合凹所（図示せず）と嵌合させることにより、ランプソケット１の組立が完了する。ここで、圧縮状態でソケット本体２内に納装されるコイルばね８のばね力により接触端子７を介してプランジャ６が前方へ弾性付勢され、挿通孔３ｃの周縁に鍔部６ｂが当接することによって、プランジャ６が挿通孔３ｃから抜け止めされた状態で挿通孔３ｃから進退自在に保持される。すなわち、プランジャ６及びコイルばね８により、口金４１との嵌合方向に受金５を移動自在とし且つ蛍光ランプ４０側に受金５を付勢する移動機構が構成される。
【００２５】
ところで、固定形ランプソケット１’は図９に示す様な構造を有し、上記の移動機構を備えておらず、ボディ３の主部３ａ内に受金５が固定されている点で可動形ランプソケット１と相違するが、それ以外の構成についてはほぼ共通であるので、詳細な説明は省略する。
【００２６】
次に、このランプソケット１，１’の器具本体２０への取付構造について説明する。図１に示すように器具本体２０の取付板２４には、カバー４の係止突起１２ａが係止する係止孔２６と、ねじ穴１３に螺合する取付ねじ１４を挿通するための挿通孔２７とが取付板２４を貫通して設けられ、係止孔２６と挿通孔２７とを結ぶ線に対して左右両側に挟持片１１，１１がそれぞれ挿入される貫通孔２５，２５が形成されている。貫通孔２５，２５は係止孔２６と挿通孔２７とを結ぶ線と略平行な方向に延び、挿通孔２７に近い側が遠い側に比べて幅狭となっており、幅広部２５ａの幅寸法は挟持片１１の横片１１ａよりも幅広に形成され、幅狭部２５ｂの幅寸法は挟持片１１の横片１１ａよりも幅狭で、縦片１１ｂの厚みよりも幅広となっている。尚、幅狭部２５ｂ，２５ｂ及び係止孔２６は挿通孔２７を中心とする略同一半径の円周上に配置されている。
【００２７】
而して、ランプソケット１，１’を取付板２４に取り付ける際には、ソケット本体２の後面を取付板２４に近づけて、挟持片１１，１１をそれぞれ貫通孔２５の幅広部２５ａに挿入した後、ソケット本体２を貫通孔２５の長手方向に沿ってスライド移動させて、挟持片１１を貫通孔２５の幅狭部２５ｂ内に挿入させると、挟持用突起たる横片１１ａの先端部とカバー４の後面（ソケット本体２の後壁）との間に幅狭部２５ｂの縁が挟持される。ここに、カバー４の後面と横片１１ａの前面との間の隙間は取付板２４の板厚と略同じ寸法に形成されているので、挟持片１１が幅狭部２５ｂ内に挿入されると、取付板２４の表面によって係止突起１２ａが前方に押圧されて、撓み片１２の先端部が前方に撓められる。また、ソケット本体２を取付板２４に対してスライド移動させて、挟持片１１を幅狭部２５ｂの端まで移動させると、撓み片１２の弾性力によって撓み片１２の係止突起１２ａが取付板２４の係止孔２６と嵌合し、ソケット本体２が取付板２４に仮保持される。この時、カバー４のねじ穴１３と取付板２４の挿通孔２７とが連通し、挿通孔２７に通した取付ねじ１４をねじ穴１３に螺合することで、ソケット本体２が取付板２４に固定されるのである。
【００２８】
ところで、両端に口金を有する直管形の蛍光ランプ４０が装着されるランプソケット１，１’では、片口金の蛍光ランプが装着されるランプソケットに比べてランプ引張り方向に加わる力が小さいので、ランプ引張り方向への取付荷重は小さくて済み、そのうえ本実施形態ではランプ引張り方向に加わる力を取付ねじ１４と挟持片１１の横片１１ａとで受けているので、取付ねじ１４に締付力の小さい小型のものを使用でき、その結果ソケット本体２の小型化を図ることができる。
【００２９】
また、取付ねじ１４のねじ締め時や蛍光ランプ４０を回転させるような力が加わった場合には、取付ねじ１４の螺合するねじ穴１３を中心としてソケット本体２を回転させるような力がソケット本体２に加わるのであるが、挟持片１１の位置規制突起たる縦片１１ｂが貫通孔２５（幅狭部２５ｂ）の縁に当接するとともに、係止突起１２ａが係止孔２６と係止することでソケット本体２の回り止めを行っており、ソケット本体２を回転させる力を３箇所の突起（係止突起１２ａと挟持片１１，１１の縦片１１ｂ，１１ｂ）で受けているので、各々の突起で受ける荷重を低減して、突起の破損を防止でき、また１個当たりの突起で受ける荷重を従来と同程度にするのであれば、ソケット本体２の取付強度を高めることができる。しかも、３箇所の突起（係止突起１２ａと挟持片１１，１１の縦片１１ｂ，１１ｂ）はねじ穴１３から略等距離の位置に配置されているので、３箇所の突起で荷重を均等に受けることができる。ここに、撓み片１２と係止突起１２ａと挟持片１１の横片１１ａ及び縦片１１ｂとで、ソケット本体２を板状の取付部位（器具本体２０の取付板２４）に取り付けるための取付手段が構成される。
【００３０】
なお、カバー４の前面側には撓み片１２の外側の部位から上側が開口した袋状の隔壁４ｆが形成されており、組立状態では隔壁４ｆとボディ２の上壁とで撓み片１２の周りが囲まれている。このように隔壁４ｆによってカバー４の撓み片１２が形成された部位と、導電部材１０の収納空間とが仕切られているので、スリット４ｄを通って内部に侵入した埃や虫などがソケット本体２内部の導電部材と接触するのを防止できる。
【００３１】
次に器具本体２０の構造について図１０〜図１２を参照して説明する。器具本体２０は、並行配置される長尺の枠体２１，２１と、枠体２１，２１の両端部間をそれぞれ連結する枠体２２，２２とで横長の四角枠状に形成されており、天井面等に適宜の取付手段を用いて取着されるようになっている。長手方向において対向する一方（図１０中の左側）の枠体２２の内側面には２個の可動形ランプソケット１，１が取り付けられ、他方の枠体２２の内側面には２個の固定形ランプソケット１’，１’が取り付けられており、ランプソケット１，１’間に蛍光ランプ４０が装着されるようになっている。つまり、枠体２２，２２の内側面からランプソケット１，１’の取付板２４が構成される。尚、図中の２３は反射板である。
【００３２】
このように構成される本実施形態の照明器具に蛍光ランプ４０を装着する手順を説明する。まず、可動形のランプソケット１に対して、口金４１の嵌合部４２を受金５の嵌合凹所５ａに挿入すると、受金５のガイド部５ｂが嵌合部４２内に進入して、嵌合部４２に保持された一対の接触片（図示せず）がそれぞれガイド部５ｂに支持された接触端子７のコンタクト部７ａと接触する。このとき、蛍光ランプ４０がランプソケット１の方へ押されることでコイルばね８のばね力に抗してプランジャ６が器具本体２０の長手方向（口金４１と受金５の嵌合方向）の後方、すなわちランプソケット１の挿通孔３ｃ内に進入する向き（図１０中の左側）に移動し、口金４１の嵌合部４２が受金５の嵌合凹所５ａに嵌合した状態でプランジャ６とともに口金４１がランプソケット１の挿通孔３ｃ内に進入する。この時、蛍光ランプ４０の反対側の端部が固定形ランプソケット１’の位置よりも図１０中の左側に移動するので、ランプソケット１，１’間に蛍光ランプ４０を挿入することができ、蛍光ランプ４０を固定形のランプソケット１’の向きに押すことで反対側の口金４１がランプソケット１’の受金５に接続される。蛍光ランプ４０をランプソケット１，１’間に装着した状態では、コイルばね８のばね力によりプランジャ６がランプソケット１の挿通孔３ｃから退出する向きに移動し、プランジャ６がランプソケット１の挿通孔３ｃから突出した状態で蛍光ランプ４０が両ランプソケット１，１’に装着される（図１１参照）。
【００３３】
尚、本実施形態ではＲ１７ｄ形の口金を備える蛍光ランプが装着される例について説明したが、蛍光ランプを上記のものに限定する趣旨のものではなく、口金を両端に備える直管形の蛍光ランプであれば、どのような蛍光ランプが装着されるランプソケットにも本発明を適用可能である。
【００３４】
【発明の効果】
上述のように、請求項１の発明は、両端に口金を有する直管形の蛍光ランプが装着されるランプソケットであって、蛍光ランプの口金を受ける受金が前面に設けられた樹脂製のソケット本体と、ソケット本体の内部に収納され給電線が接続されるとともに口金が備える接触片に電気的に接続される導電部材とを備え、ソケット本体を板状の取付部位に取り付けるための取付手段をソケット本体の後面側に設け、該取付手段を、ソケット本体の後壁に設けたスリットによって一端側を除いて後壁から分離され、他端部が前後方向において撓み自在に形成された撓み片と、撓み片の他端部から後方に向かって突出し取付部位に設けた被係止凹部と係止する係止突起と、それぞれソケット本体の後面から後方に突出し、取付部位に設けた貫通孔に挿入されて貫通孔の縁と当接することにより回り止めを行う一対の位置規制突起と、各位置規制突起の先端部から側方に突出し、ソケット本体の後壁との間で取付部位を挟持する一対の挟持用突起とで構成するとともに、ソケット本体の後壁に、取付部位に設けた挿通孔に通した取付ねじが螺合するねじ穴を設け、当該ねじ穴を中心とする同一半径の円周上に、係止突起と一対の位置規制突起とを等間隔に配置したことを特徴とし、一対の挟持用突起によりソケット本体の後壁との間で取付板を挟持するとともに、撓み片の弾性力によって撓み片に設けた係止突起と取付板の被係止凹部とを嵌合させることで、ソケット本体を取付板に取り付けることができ、且つ、蛍光ランプを回転させる力が加わった場合には係止突起と一対の位置規制突起との３つの突起で荷重を受けるから１個当たりの突起で受ける荷重を小さくして、突起の破損を防止でき、また１個の突起で受ける荷重を従来と同程度にするのであれば全体としてソケット本体の取付強度が大きくなり、確実にランプソケットを取り付けることができる。また両口金形の直管形蛍光ランプが装着されるランプソケットでは、片口金形の蛍光ランプが装着されるランプソケットに比べてランプ引張り方向の取付強度が小さく済み、そのうえランプ引張り方向に加わる力を一対の挟持用突起でも受けているので、ソケット本体を取付部位にねじ止めする場合にも取付ねじに締付力の小さい小型のものを使用できるから、ランプソケットを小型化でき、さらにソケット本体は取付板に仮固定されているのでねじ締め作業がやりやすいという効果もある。
【００３５】
また、ねじ締め時や蛍光ランプを回転させる力が加わった場合にはねじ穴を中心としてソケット本体を回転させる力が加わるのであるが、係止突起及び一対の位置規制突起をねじ穴から略等距離の位置に設けてあるので、３個の突起で荷重を均等に受けることができるという効果もある。
【００３６】
請求項２の発明では、請求項１の発明において、ソケット本体の内部に撓み片の周りを囲む袋状の隔壁を形成したことを特徴とし、スリットを通ってソケット本体の内部に侵入した塵や虫などが導電部材に付着するのを防止できるという効果がある。
【００３７】
請求項３の発明では、両端に口金を有する直管形の蛍光ランプと、蛍光ランプの口金が装着される請求項１又は２の何れか１つに記載のランプソケットと、ランプソケットを保持する器具本体と、器具本体に取り付けられてランプソケットに装着される蛍光ランプを点灯させる安定器とを備えて成ることを特徴とし、器具本体に確実に取り付けることのできる小型のランプソケットを備えた照明器具を提供できる。
【図面の簡単な説明】
【図１】本実施形態の可動タイプのランプソケットを器具本体に取り付ける前の状態の斜視図である。
【図２】同上の分解斜視図である。
【図３】同上を示し、（ａ）は正面図、（ｂ）はＡ−Ａ断面図である。
【図４】同上の下面図である。
【図５】同上のカバーを示し、（ａ）は後側から見た斜視図、（ｂ）はＢ−Ｂ断面図である。
【図６】同上のカバーを前側から見た斜視図である。
【図７】同上の背面図である。
【図８】同上を後側から見た斜視図である。
【図９】同上の固定タイプのランプソケットの分解斜視図である。
【図１０】同上のランプソケットを用いる照明器具の下面図である。
【図１１】同上の照明器具を示し、図１０のＣ−Ｃ断面図である。
【図１２】同上の照明器具を示し、図１１のＤ−Ｄ断面図である。
【図１３】従来のランプソケットを示し、（ａ）は取付板に取り付けた状態の一部破断せる側面図、（ｂ）は背面図である。
【符号の説明】
１ランプソケット
２ソケット本体
３ボディ
４カバー
４ｄスリット
６プランジャ
１１挟持片
１１ａ横片
１１ｂ縦片
１２撓み片
１２ａ係止突起
２４取付板
２５貫通孔
２５ｂ幅狭部
２６係止孔[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lamp socket to which a high-power straight tube fluorescent lamp is mounted, and a lighting fixture using the same.
[0002]
[Prior art]
As this type of lamp socket, for example, a lamp socket having a structure as shown in FIGS. 13A and 13B has been conventionally provided (see Patent Document 1).
[0003]
The lamp socket is substantially box-shaped with an open rear surface, and a body 51 provided with a lamp insertion hole into which a cap of a fluorescent lamp is inserted on the front surface. The lamp socket is attached to the body 51 so as to close the opening of the body 51. The socket main body 50 is composed of a cover 52, and a conductive metal fitting (not shown) having a lead wire connected to the base end is housed in the socket main body 50 and is in contact with the lamp pin. .
[0004]
A through hole 53 is provided in the upper part of the rear surface of the cover 52, and protrusions 54 are provided on the left and right sides of the lower part. The body 51 is provided with an insertion hole 55 that communicates with the through hole 53 of the cover 52.
[0005]
Thus, when the lamp socket is attached to the attachment plate 60 fixed to the fixture body of the lighting fixture, the tip of the screw 56 inserted through the insertion hole 55 of the body 51 and the through hole 53 of the cover 52 is attached to the attachment plate. The socket body 50 is fastened and fixed to the mounting plate 60 with the screws 56 by being threaded into the nuts 57 through the holes 61 provided in 60. At this time, the tip of the projection 54 is fitted into a hole (not shown) provided in the mounting plate 60, and the socket body 50 is prevented from rotating.
[0006]
[Patent Document 1]
Japanese Patent Laid-Open No. 10-149717 (page 3, and FIGS. 4 and 5)
[0007]
[Problems to be solved by the invention]
By the way, the lamp socket in which the single-piece type fluorescent lamp is mounted supports the fluorescent lamp in a cantilevered manner. Therefore, it is necessary to increase the force with which the receiver holds the base of the fluorescent lamp, and as a result, it is pulled toward the lamp side. It is necessary to secure a sufficient mounting strength in the lamp pulling direction due to an increase in force applied in the direction (referred to as the lamp pulling direction). On the other hand, the lamp socket to which the double-tube-type straight tube fluorescent lamp is mounted supports the fluorescent lamp from both sides, so that the receipt of the light is higher than that of the lamp socket to which the single-tube-type fluorescent lamp is mounted. The force that holds the base can be reduced, and therefore the force applied in the lamp pulling direction can be reduced and the mounting load in the lamp pulling direction can be reduced. However, a force that rotates the fluorescent lamp may be applied. It is necessary to ensure sufficient mounting strength in the rotational direction.
[0008]
In the conventional lamp socket described above, the socket body 50 is fastened and fixed to the mounting plate 60 with one screw 56. Therefore, in order to increase the mounting strength in the rotation direction of the fluorescent lamp, the screw size is increased. Thus, it is necessary to increase the tightening force by the screw 56, and as a result, there is a problem that the socket body 50 is enlarged.
[0009]
Further, when a force that rotates the fluorescent lamp is applied, a force that rotates the socket body 50 around the screw 56 is applied to the socket body 50, but the two protrusions 54 of the cover 52 are formed in the holes of the mounting plate 60. Since the socket body 50 is prevented from rotating by being fitted with the load, the load concentrates on the two protrusions 54 when a force to rotate the fluorescent lamp is applied when the screw 56 is tightened or after the socket is mounted. As a result, the projection 54 may be broken. Further, the lamp socket described above has a problem that when the socket body 50 is screwed to the mounting plate 60, the socket body 50 is not temporarily fixed to the mounting plate 60, so that the mounting operation is difficult. .
[0010]
The present invention has been made in view of the above problems, and an object of the present invention is to provide a small lamp socket that can be securely attached to an attachment site and a lighting fixture using the same.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, there is provided a lamp socket to which a straight fluorescent lamp having caps at both ends is mounted, and a receiver for receiving the cap of the fluorescent lamp is provided on the front surface. To attach a socket body to a plate-shaped attachment site, comprising a resin socket body and a conductive member that is housed inside the socket body and connected to a power supply line and electrically connected to a contact piece provided in the base The attachment means is provided on the rear surface side of the socket body, and the attachment means is separated from the rear wall except for one end side by a slit provided on the rear wall of the socket body, and the other end portion is formed to be flexible in the front-rear direction. And a locking projection that protrudes rearward from the other end of the bending piece and engages with a locked recess provided at the mounting site, and protrudes rearward from the rear surface of the socket body and is provided at the mounting site. A pair of position restricting protrusions that are inserted into the through holes and prevent rotation by coming into contact with the edges of the through holes, and project from the tip of each position restricting protrusion to the side and attached between the rear wall of the socket body A pair of clamping protrusions for clamping the part, and a screw hole into which a mounting screw passed through an insertion hole provided in the mounting part is screwed is provided on the rear wall of the socket body, and the screw hole is the center. The locking protrusion and the pair of position restricting protrusions are arranged at equal intervals on the circumference having the same radius .
[0013]
The invention of claim 2 is characterized in that, in the invention of claim 1, a bag-like partition wall surrounding the periphery of the flexure piece is formed inside the socket body.
[0014]
According to a third aspect of the present invention, a straight tube fluorescent lamp having a base at both ends, a lamp socket according to any one of the first or second aspect in which the base of the fluorescent lamp is mounted, and the lamp socket are held. It is characterized by comprising an appliance body and a ballast for turning on a fluorescent lamp attached to the appliance body and mounted in a lamp socket.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
As shown in FIGS. 10 to 12, the lighting fixture of the present embodiment is a high-output type straight tube fluorescent lamp 40, 40 having a base 41 called R17d (see JIS C7709-1) at both ends, A pair of lamp sockets (movable lamp socket 1 and fixed lamp socket 1 ′) each having a pair of metal lamps disposed along the axial direction of each fluorescent lamp 40 and fitted with a base 41, and two sets of lamp sockets 1, 2. An instrument main body 20 that holds 1 ′ and a ballast 30 that is attached to the instrument main body 20 and lights up the fluorescent lamps 40 and 40 that are attached to the lamp sockets 1 and 1 ′ of each set.
[0016]
First, the structure of a movable lamp socket (hereinafter abbreviated as “lamp socket”) 1 will be described with reference to FIGS. In the following description, unless otherwise specified, the vertical and horizontal directions are defined in the direction of FIG. 3A, and the front in FIG. Accordingly, the right end in FIG. 3B is the rear end.
[0017]
As shown in FIG. 2, the lamp socket 1 includes a socket body 2 including a box-shaped body 3 having an open rear surface and a cover 4 attached to the opening surface of the body 3. A receiver 5 for receiving a base 41 of the fluorescent lamp 40 is mounted.
[0018]
The body 3 is formed of a synthetic resin molded product in which a substantially cylindrical main portion 3a that holds the receiver 5 movably back and forth and a protruding portion 3b that protrudes downward from the rear side of the main portion 3a are integrally formed. A substantially cross-shaped insertion hole 3c through which the plunger 6 is inserted so as to be movable back and forth is opened in the front surface of the main portion 3a. Further, from the rear edges of the left and right side walls of the projecting portion 3b, the L-shaped cross section, the tip projects outward, and sandwiches a mounting plate 24 of the instrument body 20 described later with the rear surface of the cover 4 The pieces 11 and 11 are integrally projected.
[0019]
The cover 4 is made of a synthetic resin molded product and is formed in a shape that closes the opening surface of the main portion 3a and the protruding portion 3b of the body 3, and a spring seat piece 9a of a terminal fitting 9 and a coil spring, which will be described later, are formed on the upper portion of the front surface. A pair of spring holding grooves 4a into which the rear end portions of the body 8 are inserted are provided, and a pair of projecting portions 4b projecting into the projecting portions 3b of the body 3 project from the lower portion of the front surface. On the upper surface of the rear surface of the cover 4, a tongue-like bending piece 12 separated from the rear wall except for one end side is formed by a slit 4 d provided on the rear wall, and the other end portion of the bending piece 12 is bent in the front-rear direction. A locking protrusion 12a that locks with a locking hole 26 (locked recess) of the mounting plate 24 is provided on the rear surface of the other end of the bending piece 12 so as to protrude rearward. Further, as shown in FIGS. 7 and 8, an assembly screw is screwed into the substantially center of the rear surface of the cover 4 at a position approximately equidistant from the above-described locking projection 12 a of the bending piece 12 and the holding pieces 11 and 11. A screw hole 13 is formed. That is, the locking protrusion 12 a and the sandwiching pieces 11, 11 are arranged at substantially equal intervals on the circumference of substantially the same radius with the screw hole 13 as the center. In addition, notches 4e and 4e for releasing the holding pieces 11 and 11 are provided on the left and right side edges of the cover 4 at portions corresponding to the holding pieces 11 and 11 of the body 3.
[0020]
The plunger 6 is made of a synthetic resin molded product, and has a bottomed cylindrical main portion 6a having a substantially cross shape in plan view and a flange portion 6b formed at the rear end portion of the main portion 6a. A receipt 5 is provided. The receiver 5 has a fitting recess 5a that is open to the front surface and that is fitted with a fitting portion 42 that protrudes from the front end of the base 41, and a substantially E shape in plan view that protrudes forward from the bottom center of the fitting recess 5a. The contact portion 7 and 7 are respectively inserted from the rear into a pair of insertion holes (not shown) provided on the bottom surface of the fitting recess 5a.
[0021]
The contact terminal 7 is formed in a substantially cross shape by a metal member, and the contact portion 7a inserted into the fitting recess 5a from the insertion hole is accommodated and held in the vertical grooves 5c on both side surfaces of the guide portion 5b. On the other hand, the front end portion of the coil spring 8 is inserted into the rear end portion 7b of the contact terminal 7 protruding rearward of the plunger 6 from the insertion hole.
[0022]
The rear end portion of the coil spring 8 is inserted into the spring holding groove 4 a of the cover 4 together with the spring seat piece 9 a of the terminal fitting 9. The terminal fitting 9 is formed by punching and bending a metal plate, and has a substantially circular spring seat piece 9a, a quick connection terminal portion 9b to which an external electric wire is connected, a spring seat piece 9a and a quick connection terminal portion 9b. And a connecting piece 9c that connects the two. And in the state which attached the terminal metal fitting 9 to the cover 4, while the spring seat piece 9a is arrange | positioned at the bottom part of the spring holding groove 4a, the quick connection terminal part 9b is mounted in the front side of the protrusion part 4b. A hole 9f is formed through substantially the center of the spring seat piece 9a, and the hole 9f is fitted into a protrusion (not shown) provided on the bottom wall of the spring holding groove 4a, thereby positioning the spring seat piece 9a. Is to be done. At this time, the rear end portion of the coil spring 8 is in contact with the spring seat piece 9 a, and the contact terminal 7 and the terminal fitting 9 are electrically connected via the coil spring 8. Here, the conductive metal fitting 10 which electrically connects between the contact pieces (not shown) included in the base 41 of the fluorescent lamp 40 from the two sets of contact terminals 7, the coil spring 8, and the terminal metal fitting 9 and the power supply line is configured. Is done.
[0023]
The quick connection terminal portion 9b of the terminal fitting 9 is substantially U-shaped in plan view, and the core of the power supply line is provided between the contact piece 9d disposed along the left and right side walls of the body 3 and the contact piece 9d. It has the lock piece 9e to clamp. The locking piece 9e is formed by cutting and raising, and is inclined in a direction away from the lower wall of the body 3 toward the tip, and the tip edge faces the contact piece 9d. A pair of electric wire insertion holes 3d is provided on the lower wall of the body 3 corresponding to the opposing portions of the contact piece 9d and the locking piece 9e, and a power supply line (not shown) is provided from the electric wire insertion hole 3d. When the core wire from which the coating is peeled is inserted, the conductor of the core wire is sandwiched between the locking piece 9e and the contact piece 9d, and the leading edge of the locking piece 9e bites into the conductor of the core wire. Is to be prevented. That is, the core wire is held and the electrical connection to the terminal fitting 9 is made only by inserting the core wire of the power supply line into the electric wire insertion hole 3d. Further, the lower wall of the body 3 is provided with an electric wire removal hole 3e corresponding to each electric wire insertion hole 3d, and when removing the core wire of the feeder connected to the quick connection terminal portion 9b, the corresponding electric wire When the tool is inserted from the removal hole 3e and the locking piece 9e is pressed upward with the tip of the tool, the locking piece 9e is bent in a direction away from the contact piece 9d, so that the locking piece 9e is a conductor of the core wire. It is possible to easily pull out the power supply line away from.
[0024]
Next, a procedure for assembling the lamp socket 1 will be briefly described below. First, the main portion 6a of the plunger 6 is inserted into the insertion hole 3c of the body 3 from the rear, and after the contact terminal 7, the coil spring 8 and the terminal fitting 9 are mounted therein, the cover 4 is attached to the opening surface of the body 3. Then, the assembly of the lamp socket 1 is completed by fitting the assembly claw 4 c of the cover 4 with the fitting recess (not shown) of the body 3. Here, the plunger 6 is elastically biased forward via the contact terminal 7 by the spring force of the coil spring 8 housed in the socket body 2 in the compressed state, and the flange portion 6b comes into contact with the peripheral edge of the insertion hole 3c. Thus, the plunger 6 is held so as to be able to advance and retract from the insertion hole 3c in a state in which the plunger 6 is prevented from coming off from the insertion hole 3c. That is, the plunger 6 and the coil spring 8 constitute a moving mechanism that allows the receiver 5 to move in the fitting direction with the base 41 and biases the receiver 5 toward the fluorescent lamp 40.
[0025]
By the way, the fixed lamp socket 1 ′ has a structure as shown in FIG. 9, does not include the moving mechanism described above, and is movable in that the receiver 5 is fixed in the main portion 3a of the body 3. Although different from the lamp socket 1, the other configurations are almost the same, and a detailed description thereof will be omitted.
[0026]
Next, a structure for attaching the lamp sockets 1 and 1 'to the instrument body 20 will be described. As shown in FIG. 1, the mounting plate 24 of the instrument main body 20 has an insertion hole for inserting a locking hole 26 that locks the locking projection 12 a of the cover 4 and a mounting screw 14 that is screwed into the screw hole 13. 27 is provided through the mounting plate 24, and through holes 25 and 25 are formed on the left and right sides of the line connecting the locking hole 26 and the insertion hole 27, respectively. Yes. The through holes 25 and 25 extend in a direction substantially parallel to the line connecting the locking hole 26 and the insertion hole 27, and the side closer to the insertion hole 27 is narrower than the far side, and the width dimension of the wide portion 25 a. Is formed wider than the horizontal piece 11a of the holding piece 11, and the width of the narrow portion 25b is narrower than the horizontal piece 11a of the holding piece 11 and wider than the thickness of the vertical piece 11b. The narrow portions 25 b and 25 b and the locking hole 26 are arranged on a circumference having substantially the same radius with the insertion hole 27 as the center.
[0027]
Thus, when the lamp sockets 1, 1 ′ are attached to the attachment plate 24, the rear surface of the socket body 2 is brought close to the attachment plate 24, and the sandwiching pieces 11, 11 are inserted into the wide portions 25 a of the through holes 25, respectively. After that, when the socket body 2 is slid along the longitudinal direction of the through hole 25 and the sandwiching piece 11 is inserted into the narrow portion 25b of the through hole 25, the tip of the lateral piece 11a serving as the sandwiching projection and the cover The edge of the narrow portion 25b is sandwiched between the rear surface of 4 (the rear wall of the socket body 2). Here, since the gap between the rear surface of the cover 4 and the front surface of the horizontal piece 11a is formed to have substantially the same size as the thickness of the mounting plate 24, the sandwiching piece 11 is inserted into the narrow portion 25b. The locking projection 12a is pressed forward by the surface of the mounting plate 24, and the tip of the bending piece 12 is bent forward. When the socket body 2 is slid with respect to the mounting plate 24 and the holding piece 11 is moved to the end of the narrow portion 25b, the locking protrusion 12a of the bending piece 12 is moved by the elastic force of the bending piece 12. The socket main body 2 is temporarily held by the mounting plate 24. At this time, the screw hole 13 of the cover 4 communicates with the insertion hole 27 of the mounting plate 24, and the mounting screw 14 passed through the insertion hole 27 is screwed into the screw hole 13, so that the socket body 2 is attached to the mounting plate 24. It is fixed.
[0028]
By the way, in the lamp sockets 1 and 1 ′ to which the straight tube type fluorescent lamps 40 having the caps at both ends are mounted, the force applied in the lamp pulling direction is small as compared with the lamp socket to which the fluorescent lamp of the single cap is mounted. The mounting load in the lamp pulling direction can be small, and in this embodiment, the force applied in the lamp pulling direction is received by the mounting screw 14 and the lateral piece 11a of the sandwiching piece 11, so that the mounting screw 14 has a tightening force. A small and small one can be used, and as a result, the socket body 2 can be miniaturized.
[0029]
Further, when the mounting screw 14 is tightened or when a force that rotates the fluorescent lamp 40 is applied, the force that rotates the socket body 2 around the screw hole 13 into which the mounting screw 14 is screwed is used. Although it is added to the main body 2, the vertical piece 11 b which is a position restricting protrusion of the sandwiching piece 11 abuts on the edge of the through hole 25 (narrow portion 25 b), and the engaging protrusion 12 a is engaged with the engaging hole 26. The socket body 2 is prevented from rotating, and the force for rotating the socket body 2 is received by the three projections (the locking projection 12a and the vertical pieces 11b and 11b of the sandwiching pieces 11 and 11). The load received by the protrusions can be reduced to prevent breakage of the protrusions, and the mounting strength of the socket body 2 can be increased if the load received by one protrusion is approximately the same as the conventional one. Moreover, since the three protrusions (the locking protrusion 12a and the vertical pieces 11b and 11b of the holding pieces 11 and 11) are arranged at substantially equal distances from the screw hole 13, the load is evenly distributed by the three protrusions. Can receive. Here, the attachment means for attaching the socket body 2 to the plate-like attachment site (attachment plate 24 of the instrument body 20) with the bending piece 12, the locking projection 12a, and the horizontal piece 11a and the vertical piece 11b of the holding piece 11. Is configured.
[0030]
Note that a bag-like partition wall 4f is formed on the front side of the cover 4 so that the upper side opens from the outer portion of the flexible piece 12. In the assembled state, the partition wall 4f and the upper wall of the body 2 surround the flexible piece 12. Is surrounded. Thus, the partition 4f separates the portion where the flexible piece 12 of the cover 4 is formed from the storage space for the conductive member 10, so that dust, insects and the like that have entered the interior through the slit 4d are retained in the socket body 2. Contact with the internal conductive member can be prevented.
[0031]
Next, the structure of the instrument body 20 will be described with reference to FIGS. The instrument main body 20 is formed in a horizontally long rectangular frame shape with long frame bodies 21 and 21 arranged in parallel and frame bodies 22 and 22 respectively connecting both ends of the frame bodies 21 and 21. It is attached to the ceiling surface or the like using appropriate attachment means. Two movable lamp sockets 1 and 1 are attached to the inner surface of one frame body 22 (left side in FIG. 10) facing in the longitudinal direction, and two fixed lamp sockets are attached to the inner surface of the other frame body 22. The lamp sockets 1 'and 1' are attached, and the fluorescent lamp 40 is mounted between the lamp sockets 1 and 1 '. That is, the mounting plate 24 of the lamp sockets 1, 1 ′ is formed from the inner surfaces of the frame bodies 22, 22. In the figure, reference numeral 23 denotes a reflector.
[0032]
A procedure for mounting the fluorescent lamp 40 on the lighting fixture of the present embodiment configured as described above will be described. First, when the fitting portion 42 of the base 41 is inserted into the fitting recess 5a of the receiver 5 with respect to the movable lamp socket 1, the guide portion 5b of the receiver 5 enters the fitting portion 42. A pair of contact pieces (not shown) held by the fitting portion 42 come into contact with the contact portion 7a of the contact terminal 7 supported by the guide portion 5b. At this time, the fluorescent lamp 40 is pushed toward the lamp socket 1 so that the plunger 6 is against the spring force of the coil spring 8 in the longitudinal direction of the instrument body 20 (the fitting direction of the base 41 and the receiver 5). That is, the plunger 6 moves in a direction (left side in FIG. 10) to enter the insertion hole 3 c of the lamp socket 1 and the fitting portion 42 of the base 41 is fitted in the fitting recess 5 a of the receiver 5. At the same time, the base 41 enters the insertion hole 3 c of the lamp socket 1. At this time, since the opposite end of the fluorescent lamp 40 moves to the left in FIG. 10 from the position of the fixed lamp socket 1 ′, the fluorescent lamp 40 can be inserted between the lamp sockets 1 and 1 ′. When the fluorescent lamp 40 is pushed in the direction of the fixed lamp socket 1 ′, the base 41 on the opposite side is connected to the receiver 5 of the lamp socket 1 ′. In a state where the fluorescent lamp 40 is mounted between the lamp sockets 1 and 1 ′, the plunger 6 moves in the direction of retreating from the insertion hole 3 c of the lamp socket 1 by the spring force of the coil spring 8, and the plunger 6 is inserted into the lamp socket 1. The fluorescent lamp 40 is attached to both lamp sockets 1 and 1 ′ in a state of protruding from the hole 3c (see FIG. 11).
[0033]
In this embodiment, an example in which a fluorescent lamp having an R17d type cap is mounted has been described. However, the fluorescent lamp is not intended to be limited to the above, and a straight tube type fluorescent lamp having a cap at both ends. If so, the present invention can be applied to any lamp socket in which any fluorescent lamp is mounted.
[0034]
【The invention's effect】
As described above, the invention of claim 1 is a lamp socket to which a straight tube type fluorescent lamp having caps at both ends is mounted, and a receiving member for receiving the cap of the fluorescent lamp is provided on the front surface. An attachment means for attaching the socket body to a plate-like attachment site, comprising: a socket body; and a conductive member housed in the socket body and connected to a power supply line and electrically connected to a contact piece provided in the base. Is provided on the rear surface side of the socket body, and the attaching means is separated from the rear wall except for one end side by a slit provided on the rear wall of the socket body, and the other end portion is formed to be freely bent in the front-rear direction. And a locking projection that protrudes rearward from the other end portion of the flexure piece and engages with a locked recess provided at the attachment site, and protrudes rearward from the rear surface of the socket body, and into a through hole provided at the attachment site. Insertion A pair of position restricting protrusions that prevent rotation by abutting against the edge of the through hole, and a pair that protrudes laterally from the tip of each position restricting protrusion and sandwiches the attachment site between the rear wall of the socket body And a screw hole into which a mounting screw passed through an insertion hole provided in the mounting portion is screwed on the rear wall of the socket body, and the circumference of the same radius centered on the screw hole The locking projection and the pair of position restricting projections are arranged at equal intervals on the top, and the mounting plate is clamped between the rear wall of the socket body by the pair of clamping projections, and the elasticity of the flexure piece The socket body can be attached to the mounting plate by fitting the locking projection provided on the deflecting piece with the locking recessed portion of the mounting plate by force, and when the force to rotate the fluorescent lamp is applied Is a locking projection and a pair of position-regulating projections Since the load received by each protrusion can be reduced by reducing the load received by each protrusion, it is possible to prevent damage to the protrusion, and if the load received by one protrusion is the same level as before, the socket as a whole The mounting strength of the main body is increased, and the lamp socket can be securely mounted. In addition, the lamp socket in which a straight-tube fluorescent lamp with a double-necked die is mounted requires less mounting strength in the lamp tension direction than a lamp socket in which a single-necked fluorescent lamp is fitted, and the force applied in the lamp tension direction Can also be used with a pair of clamping projections, so even when the socket body is screwed to the mounting site, a small mounting screw with a small clamping force can be used, so the lamp socket can be downsized and the socket body Since it is temporarily fixed to the mounting plate, there is also an effect that the screw tightening operation is easy.
[0035]
Although when a force to rotate the screw fastening or when the fluorescent lamp is applied is the force to rotate the socket body around the screw holes is applied, substantially like the locking projections and the pair of position restricting projections from the threaded hole Since it is provided at the position of the distance, there is also an effect that the load can be evenly received by the three protrusions.
[0036]
The invention of claim 2 is characterized in that, in the invention of claim 1, a bag-shaped partition wall surrounding the flexible piece is formed inside the socket body, and dust or the like that has entered the inside of the socket body through the slits. There is an effect that insects and the like can be prevented from adhering to the conductive member.
[0037]
According to a third aspect of the present invention, a straight tube fluorescent lamp having a base at both ends, a lamp socket according to any one of the first or second aspect , wherein the base of the fluorescent lamp is mounted, and the lamp socket is held. An illumination having a small lamp socket that can be securely attached to the fixture body, characterized by comprising a fixture main body and a ballast for lighting a fluorescent lamp attached to the fixture main body and mounted on the lamp socket. Equipment can be provided.
[Brief description of the drawings]
FIG. 1 is a perspective view of a state before a movable type lamp socket of the present embodiment is attached to an apparatus main body.
FIG. 2 is an exploded perspective view of the above.
FIG. 3 shows the same as above, (a) is a front view and (b) is a cross-sectional view along AA.
FIG. 4 is a bottom view of the above.
5A and 5B show the same cover, where FIG. 5A is a perspective view seen from the rear side, and FIG.
FIG. 6 is a perspective view of the same cover as viewed from the front side.
FIG. 7 is a rear view of the above.
FIG. 8 is a perspective view of the above viewed from the rear side.
FIG. 9 is an exploded perspective view of the same fixed type lamp socket.
FIG. 10 is a bottom view of a lighting fixture using the lamp socket.
11 is a cross-sectional view taken along the line CC of FIG.
12 is a sectional view taken along the line DD of FIG.
FIGS. 13A and 13B show a conventional lamp socket, in which FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Lamp socket 2 Socket main body 3 Body 4 Cover 4d Slit 6 Plunger 11 Holding piece 11a Horizontal piece 11b Vertical piece 12 Bending piece 12a Locking protrusion 24 Mounting plate 25 Through-hole 25b Narrow part 26 Locking hole

Claims

A lamp socket to which a straight tube type fluorescent lamp having a base at both ends is mounted, and a socket for receiving the base of the fluorescent lamp is provided on the front side, and a resin socket body is housed in the socket body and supplied. A conductive member electrically connected to a contact piece provided in the base and connected to the base, and provided with a mounting means on the rear surface side of the socket main body for mounting the socket main body on the plate-shaped mounting portion. Are separated from the rear wall except for one end by a slit provided on the rear wall of the socket body, and the other end is formed to be freely bent in the front-rear direction, and the other end of the bent piece is directed rearward. The locking projections that protrude and protrude from the rear surface of the socket body, and are inserted into the through holes provided in the mounting site to come into contact with the edges of the through holes. A pair of position regulating protrusion to conduct more detent protrudes laterally from the distal end portion of each position regulating projection, thereby constituted by a pair of clamping projections for clamping the attachment portion between the rear wall of the socket body, Provided on the rear wall of the socket body is a screw hole into which a mounting screw passed through an insertion hole provided in the mounting portion is screwed, and a locking projection and a pair of positions on the circumference of the same radius centered on the screw hole A lamp socket characterized in that the regulating protrusions are arranged at equal intervals .

The lamp socket according to claim 1 , wherein a bag-shaped partition wall surrounding the flexible piece is formed inside the socket body .

A straight tube type fluorescent lamp having a base at both ends, a lamp socket according to any one of claims 1 and 2 to which a base of the fluorescent lamp is attached, an instrument body holding the lamp socket, and an instrument body And a ballast for lighting a fluorescent lamp attached to the lamp socket.