JP4134655B2

JP4134655B2 - Recessed lighting fixture

Info

Publication number: JP4134655B2
Application number: JP2002279777A
Authority: JP
Inventors: 武彦内海
Original assignee: Matsushita Electric Works Ltd
Current assignee: Panasonic Electric Works Co Ltd
Priority date: 2002-09-25
Filing date: 2002-09-25
Publication date: 2008-08-20
Anticipated expiration: 2022-09-25
Also published as: JP2004119157A

Description

【０００１】
【発明の属する技術分野】
本発明は、埋め込み型照明器具に関するものである。
【０００２】
【従来の技術】
以前より、天井などの取付面に設けた埋め込み孔に器具本体を挿入して使用される埋め込み型照明器具（いわゆる、ダウンライト）が提供されている。
【０００３】
これら埋め込み型照明器具の器具本体を取付面に固定する方法としては、弾性を有し略Ｖ字形に折曲された取付ばねの一端を器具本体の側面に取り付け、他端が器具本体の外側斜め上方へ突出するように取付ばねを設けておき、取付ばねの他端が埋め込み孔に入るように取付ばねを弾性変形させた状態で器具本体を埋め込み孔に挿入し、取付ばねの復元力を用いて、取付ばねと器具本体の下端部に設けられた鍔部とで取付面を挟持して固定する方法がある（例えば、特許文献１乃至３参照。）。
【０００４】
上記した取付面への固定方法を用いた従来の埋め込み型照明器具の一例を図９に示す。この埋め込み型照明器具は、天井などの取付面に設けた埋め込み孔（図示せず）に挿入され、下端に設けられた外鍔部１ａを前記埋め込み孔の周りの取付下面に当接させて取付けられる器具本体１と、器具本体１の外側面下方に設けられたばね取付部１ｂと、弾性を有する２つの取付ばね２，２とを備えてなる。
【０００５】
器具本体１は、上端部にランプソケット３を設け、ランプソケット３の上側に横方向に延出する天板４を設け、天板４に安定器５を取付けている。
【０００６】
取付ばね２は、一端部２ａがばね取付部１ｂに固定され、略Ｖ字形に折曲された他端部２ｂが器具本体１の外側斜め上方へ突出するように設けられている。
【０００７】
上記のように構成された埋め込み型照明器具は、取付ばね２，２の他端部２ｂ，２ｂが埋め込み孔に入るように取付ばね２，２を器具本体１側に弾性変形させて、埋め込み孔に挿入され、外鍔部１ａが埋め込み孔の周りの取付下面に当接すると共に取付ばね２，２が埋め込み孔の内周縁に係止して、取付ばね２，２の弾性力と外鍔部１ａとで取付面を挟持して固定される。
【０００８】
ここで、ばね取付部１ｂについてさらに詳説する。
【０００９】
ばね取付部１ｂは、図１０に示すように、取付ばね２の器具本体１と反対側の面を保持する一対のばね保持部１０，１０と、取付ばね２の器具本体１側の面を支える２つのばね支えリブ１１，１１と、一対のばね保持部１０，１０の中心線ｘ上に設けられ、ばね取付部１ｂに挿入された取付ばね２の抜けを防止する抜け防止爪１２とからなる。
【００１０】
ばね保持部１０，１０は、取付ばね２の一端部２ａの長手方向に沿った両側端と並行するように、取付ばね２の一端部２ａの幅より若干広めの間隔を水平方向に有して並設された一対の立壁１０ａ，１０ａを有し、夫々の立壁１０ａ，１０ａの長手方向に沿った前端から対向する立壁１０ａの方向へ向けて延設片１０ｂ，１０ｂが延設されている。
【００１１】
ばね支えリブ１１，１１は、立壁１０ａの長手方向と並行するように細長に形成され、夫々のばね支えリブ１１，１１を、一対の立壁１０ａ，１０ａ間の中心線ｘと夫々の立壁１０ａ，１０ａとの間で、中心線ｘ寄りの位置に設けている。
【００１２】
上記のように構成されたばね取付部１ｂには、図１１に示すように、取付ばね２の一端部２ａが、ばね保持部１０，１０の延設片１０ｂ，１０ｂの裏面と、ばね支えリブ１１の前面との間に上方より差し込まれる。一度差し込まれた取付ばね２は、一端部２ａを形成するばね板の中心に、先端が器具本体１側に向けて略く字形に折曲された弾性片２ｃを有しており、弾性片２ｃと抜け防止爪１２の下面とが係合することにより、取付ばね２の抜けが防止される。
【００１３】
【特許文献１】
特開平８−１２４４１９号公報
【特許文献２】
特開平９−１３４６１１号公報
【特許文献３】
特開平４−６２７０９号公報
【００１４】
【発明が解決しようとする課題】
しかしながら、光源を水平状態に設けたタイプの埋め込み型照明器具などでは、照明器具を施工する際に、光源の方向を合わすために取付ばね２を取付面に取り付けた状態で照明器具を回して位置調整をすることがあり、その際、取付ばね２には、ねじれる方向の力がかかり、取付ばね２を固定しているばね取付部１ｂにもその応力がかかることとなる。そのため、弾性力が少なく局部的に応力がかかると脆く折れやすい物性をもった樹脂材料を用いて前記従来例のようなばね取付部１ｂを形成した場合、取付面に取り付けた状態で照明器具を回して位置調整をするなどしてばね取付部１ｂに応力がかかると、ばね取付部１ｂが破壊する恐れがあるため、たとえコストが安くても、弾性力が少なく局部的に応力がかかると脆く折れやすい物性をもった樹脂材料は、前記ばね取付部１ｂを有する埋め込み型照明器具の形成には用いることができないという問題があった。
【００１５】
本発明は上記問題点に鑑みて為されたものであって、その目的とするところは、弾性力が少なく局部的に応力がかかると脆くて折れやすいがコストの安い樹脂材料を用いてコストダウンを図ることのできる埋め込み型照明器具を提供することにある。
【００１６】
【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の発明は、取付面に設けられた埋め込み孔に挿入され、下端に設けられた外鍔部を前記埋め込み孔の周りの取付下面に当接させて取付けられる器具本体と、前記器具本体の外側面下方に設けられたばね取付部と、前記ばね取付部に一端部が固定され他端部の弾性力で前記器具本体を前記取付面に固定する複数の取付ばねとを備え、前記ばね取付部は、前記取付ばねの一端部の長手方向に沿った両側端と並行するように水平方向に所定の間隔を有して一対の立壁が並設され、夫々の立壁の長手方向に沿った前端から対向する立壁の方向へ向けて延設された延設片で前記取付ばねの器具本体と反対側の面を保持するばね保持部と、前記一対の立壁の間に設けられ前記取付ばねの器具本体側の面を支えるばね支えリブとを備え、前記ばね保持部の延設片の下端に、該延設片と前記立壁と前記器具本体の外側面とを一体に接続する補強壁を設けたものとした。
【００１７】
請求項２の発明は、請求項１記載の発明において、前記補強壁の下面から、該補強壁と直交し該補強壁と前記器具本体の外側面とをつなぐリブを延設したものとした。
【００１８】
請求項３の発明は、請求項２記載の発明において、前記立壁の長手方向と並行する２つの前記ばね支えリブを有し、夫々のばね支えリブを、前記一対の立壁間の中心線と夫々の立壁との間で、前記立壁寄りの位置に設けたものとした。
【００１９】
請求項４の発明は、請求項３記載の発明において、前記ばね保持部の延設片を厚肉に形成したものとした。
【００２０】
請求項５の発明は、請求項３記載の発明において、前記ばね保持部の立壁と延設片との隅部を、該立壁および該延設片の両面に対して斜めに形成したものとした。
【００２１】
請求項６の発明は、請求項３記載の発明において、前記ばね保持部の立壁と延設片との隅部にアールを設けたものとした。
【００２２】
【発明の実施の形態】
以下、本発明を実施形態１から実施形態５によって説明する。
【００２３】
（実施形態１）
本実施形態の埋め込み型照明器具は、図９乃至１１に示した従来の埋め込み型照明器具のばね取付部１ｂに代えて、ばね取付部１ｃを備えた点に特徴があり、それ以外の器具本体１や取付ばね２などの基本構成は前記従来例と共通するために共通する部分については同一の符号を付して説明を省略する。
【００２４】
尚、上記した従来の埋め込み型照明器具は、器具本体１の上端部にランプソケット３を設けていたが、ランプソケット３を水平状態に設けたタイプの埋め込み型照明器具でもよい。
【００２５】
図１に、本実施形態のばね取付部１ｃを示す。このばね取付部１ｃは、図１０の従来のばね取付部１ｂと比較して、一対のばね保持部１０，１０の延設片１０ｂ，１０ｂの夫々の下端に、該延設片１０ｂと立壁１０ａと器具本体１の外側面とを一体に接続する補強壁１０ｃを設けた点に特徴がある。
【００２６】
また、従来のばね取付部１ｂと同様に、２つのばね支えリブ１１，１１が、立壁１０ａの長手方向と並行するように細長に形成され、夫々のばね支えリブ１１，１１が、一対の立壁１０ａ，１０ａ間の中心線ｘと夫々の立壁１０ａ，１０ａとの間で、中心線ｘ寄りの位置に設けられると共に、中心線ｘ上には、ばね取付部１ｃに挿入された取付ばね２の抜けを防止する抜け防止爪１２が設けられている。
【００２７】
かかるばね取付部１ｃを備えた埋め込み型照明器具においては、弾性力が少なく局部的に応力がかかると脆く折れやすい物性をもった樹脂材料を用いてばね取付部１ｃを形成し、天井などの取付面に取り付けた状態で器具本体１を回して位置調整するなどして、ばね取付部１ｃに応力がかかった場合でも、補強壁１を設けたことによりばね保持部１０の強度が増しており、ばね保持部１０の破壊を防ぐことができるので、弾性力が少なく局部的に応力がかかると脆くて折れやすいがコストの安い樹脂材料を用いて製品のコストダウンを図ることができる。
【００２８】
（実施形態２）
本実施形態における基本構成は実施形態１と共通するために共通する部分については同一の符号を付して説明を省略し、本実施形態の特徴となる部分についてのみ詳細に説明する。
【００２９】
則ち、本実施形態の埋め込み型照明器具は、実施形態１の埋め込み型照明器具において、図２に示すように、ばね取付部１ｃの補強壁１０ｃの下面から、補強壁１０ｃと直交し、補強壁１０ｃと器具本体１の外側面とをつなぐリブ１０ｄを延設した点に特徴がある。
【００３０】
かかるばね取付部１ｄを備えた埋め込み型照明器具においては、ばね保持部１０の強度が実施形態１より更に増し、ばね取付部１ｄに応力がかかった場合でも、ばね取付部１ｄの破壊を防ぐことができるので、弾性力が少なく局部的に応力がかかると脆くて折れやすいがコストの安い樹脂材料を用いて製品のコストダウンを図ることができる。
【００３１】
（実施形態３）
本実施形態における基本構成は実施形態２と共通するために共通する部分については同一の符号を付して説明を省略し、本実施形態の特徴となる部分についてのみ詳細に説明する。
【００３２】
則ち、本実施形態の埋め込み型照明器具は、実施形態２の埋め込み型照明器具においては一対の立壁１０ａ，１０ａ間の中心線ｘと夫々の立壁１０ａ，１０ａとの間で、中心線ｘ寄りの位置に設けられていた２つのばね支えリブ１１，１１を、夫々のばね支えリブ１１を設ける間隔を広げて、図３に示すように、一対の立壁１０ａ，１０ａ間の中心線ｘと夫々の立壁１０ａ，１０ａとの間で、夫々の立壁１０ａ寄りの位置に設けた点に特徴がある。
【００３３】
図４に示すように、埋め込み型照明器具を取付面に取り付けた状態で、器具本体１を矢印ｙ１の方向へ回すと、取付ばね２にねじれる方向の力がかかると共に、取付ばね２からばね保持部１０へ、回転の進行方向側のばね支えリブ１１の前面１１ａを支点として矢印ｙ２で示した応力がかかり、回転の進行方向と反対側のばね保持部１０の破線で囲った部分ｚが破壊してしまう。
【００３４】
そこで、２つのばね支えリブ１１，１１を、間隔を広げて設けることにより、取付ばね２に力が加わった際にばね保持部１０にかかる応力の支点がずれて、ばね保持部１０にかかる応力が低減される。
【００３５】
かかるばね取付部１ｅを備えた埋め込み型照明器具においては、取付面に取り付けた状態で器具本体１を回して位置調整するなどして、ばね取付部１ｅに応力がかかった場合でも、ばね支えリブ１１，１１の間隔を広げたことによりばね保持部１０にかかる応力が低減され、ばね保持部１０の破壊を更に防ぐことができるので、弾性力が少なく局部的に応力がかかると脆くて折れやすいがコストの安い樹脂材料を用いて製品のコストダウンを図ることができる。
【００３６】
（実施形態４）
本実施形態における基本構成は実施形態３と共通するために共通する部分については同一の符号を付して説明を省略し、本実施形態の特徴となる部分についてのみ詳細に説明する。
【００３７】
則ち、本実施形態の埋め込み型照明器具は、実施形態３の埋め込み型照明器具において、取付ばね２の器具本体１と反対側の面を保持する延設片１０ｂを、図５に示すように、厚肉に形成した点に特徴がある。
【００３８】
例えば、実施形態３の延設片１０ｂの肉厚を１．５ｍｍとすると、本実施形態の延設片の肉厚は、２．２ｍｍとする。
【００３９】
かかるばね取付部１ｆを備えた埋め込み型照明器具においては、図４で示したように取付ばね２からの応力を受ける延設片１０ｂの強度が増し、ばね取付部１ｆに応力がかかった場合でも、ばね取付部１ｆの破壊を更に防ぐことができるので、弾性力が少なく局部的に応力がかかると脆くて折れやすいがコストの安い樹脂材料を用いて製品のコストダウンを図ることができる。
【００４０】
尚、本実施形態のばね取付部１ｆを備えた埋め込み型照明器具と、従来例で示したばね取付部１ｂを備えた埋め込み型照明器具の、夫々のばね取付部の強度比較を行った結果を表１に示す。
【００４１】
実験方法としては、従来より使用している樹脂材料の一例としてＰＢＴ（ポリブチレンテレフタレート）を用い、弾性力が少なく局部的に応力がかかると脆くて折れやすい樹脂材料の一例としてＳＰＳ（シンジオタクチックポリスチレン）を用い、ＰＢＴを用いて形成した従来のばね取付部１ｂを備えた埋め込み型照明器具と、ＳＰＳを用いて形成した従来のばね取付部１ｂを備えた埋め込み型照明器具と、ＳＰＳを用いて形成した本実施形態のばね取付部１ｆを備えた埋め込み型照明器具とを、図６に示すように、夫々の取付ばね２の先端（他端部）２ｂを掴んで矢印ｙ３方向（左右何れか）に力をかけてばね取付部に応力がかかるようにして、ばね取付部が破壊した時の応力値を測定した。
【００４２】
尚、実験にはランプソケット３が水平状態に設けられたタイプの埋め込み型照明器具を用い、図６中において、６は蛍光灯であり、７は電子スタータである。
【００４３】
【表１】

【００４４】
表１より、従来のばね取付部１ｂを備えた照明器具をＳＰＳを用いて形成すると、ＰＢＴを用いて形成した時と比べて、半分以下の応力値でばね取付部１ｂが破壊してしまうが、本実施形態のばね取付部１ｆを備えた照明器具の場合、ＳＰＳを用いて形成しても、従来のＰＢＴを用いて形成した従来のばね取付部１ｂを備えた照明器具と同等以上の応力値までばね取付部１ｆが破壊せず、強度が向上していることが確認できる。
【００４５】
よって、弾性力が少なく局部的に応力がかかると脆くて折れやすいがコストの安い樹脂材料を用いて照明器具を形成し、コストダウンを図ることができる。
【００４６】
（実施形態５）
本実施形態における基本構成は実施形態３と共通するために共通する部分については同一の符号を付して説明を省略し、本実施形態の特徴となる部分についてのみ詳細に説明する。
【００４７】
則ち、本実施形態の埋め込み型照明器具は、実施形態３の埋め込み型照明器具において、ばね保持部１０を形成する立壁１０ａと延設片１０ｂとの隅部を、図７に示すように、立壁１０ａおよび延設片１０ｂの両面に対して斜めとなるように形成した点に特徴がある。
【００４８】
かかるばね取付部１ｇを備えた埋め込み型照明器具においては、図４で示したように取付ばね２からの応力を受ける延設片１０ｂと立壁１０ａとの隅部（コーナー部）の肉厚が増し、ばね保持部１０の強度が増すので、ばね取付部１ｇに応力がかかった場合でも、ばね取付部１ｇの破壊を更に防ぐことができ、弾性力が少なく局部的に応力がかかると脆くて折れやすいがコストの安い樹脂材料を用いて製品のコストダウンを図ることができる。
【００４９】
尚、延設片１０ｂと立壁１０ａとの隅部の肉厚を増すための形状としては、図８に示すように、立壁１０ａと延設片１０ｂとの隅部にアール設けた形状でもよい。この場合も、ばね保持部１０の強度が増し、弾性力が少なく局部的に応力がかかると脆くて折れやすいがコストの安い樹脂材料を用いて製品のコストダウンを図ることができる。
【００５０】
【発明の効果】
請求項１の発明は、取付面に設けられた埋め込み孔に挿入され、下端に設けられた外鍔部を前記埋め込み孔の周りの取付下面に当接させて取付けられる器具本体と、前記器具本体の外側面下方に設けられたばね取付部と、前記ばね取付部に一端部が固定され他端部の弾性力で前記器具本体を前記取付面に固定する複数の取付ばねとを備え、前記ばね取付部は、前記取付ばねの一端部の長手方向に沿った両側端と並行するように水平方向に所定の間隔を有して一対の立壁が並設され、夫々の立壁の長手方向に沿った前端から対向する立壁の方向へ向けて延設された延設片で前記取付ばねの器具本体と反対側の面を保持するばね保持部と、前記一対の立壁の間に設けられ前記取付ばねの器具本体側の面を支えるばね支えリブとを備え、前記ばね保持部の延設片の下端に、該延設片と前記立壁と前記器具本体の外側面とを一体に接続する補強壁を設けたので、前記補強壁を設けたことにより前記ばね保持部の強度が増し、弾性力が少なく局部的に応力がかかると脆く折れやすい物性をもった樹脂材料を用いて前記ばね取付部を形成し該ばね取付部に応力がかかった場合でも前記ばね保持部の破壊を防ぐことができるので、弾性力が少なく局部的に応力がかかると脆くて折れやすいがコストの安い樹脂材料を用いてコストダウンを図ることができるという効果がある。
【００５１】
請求項２の発明は、請求項１記載の発明において、前記補強壁の下面から、該補強壁と直交し該補強壁と前記器具本体の外側面とをつなぐリブを延設したので、前記ばね保持部の強度が更に増し、弾性力が少なく局部的に応力がかかると脆く折れやすい物性をもった樹脂材料を用いて前記ばね取付部を形成し前記ばね取付部に応力がかかった場合でも、前記ばね取付部の破壊を更に防ぐことができるので、弾性力が少なく局部的に応力がかかると脆くて折れやすいがコストの安い樹脂材料を用いて製品のコストダウンを図ることができるという効果がある。
【００５２】
請求項３の発明は、請求項２記載の発明において、前記立壁の長手方向と並行する２つの前記ばね支えリブを有し、夫々のばね支えリブを、前記一対の立壁間の中心線と夫々の立壁との間で、前記立壁寄りの位置に設けたので、弾性力が少なく局部的に応力がかかると脆く折れやすい物性をもった樹脂材料を用いて前記ばね取付部を形成し、前記ばね支えリブを支点として前記取付ばねから前記ばね保持部に応力がかかった場合でも、前記２つのばね支えリブの間隔を広げて設けたことにより前記ばね保持部にかかる応力の支点がずれて、前記ばね保持部にかかる応力が低減され、前記ばね保持部の破壊を更に防ぐことができるので、弾性力が少なく局部的に応力がかかると脆くて折れやすいがコストの安い樹脂材料を用いて製品のコストダウンを図ることができるという効果がある。
【００５３】
請求項４の発明は、請求項３記載の発明において、前記ばね保持部の延設片を厚肉に形成したので、前記ばね保持部の強度が増し、弾性力が少なく局部的に応力がかかると脆く折れやすい物性をもった樹脂材料を用いて前記ばね取付部を形成し前記ばね保持部に応力がかかった場合でも、前記ばね保持部の破壊を更に防ぐことができるので、弾性力が少なく局部的に応力がかかると脆くて折れやすいがコストの安い樹脂材料を用いて製品のコストダウンを図ることができるという効果がある。
【００５４】
請求項５の発明は、請求項３記載の発明において、前記ばね保持部の立壁と延設片との隅部を、該立壁および該延設片の両面に対して斜めに形成したので、前記立壁と前記延設片との隅部の肉厚が増すことで前記ばね保持部の強度が増し、弾性力が少なく局部的に応力がかかると脆く折れやすい物性をもった樹脂材料を用いて前記ばね取付部を形成し前記ばね保持部に応力がかかった場合でも、前記ばね保持部の破壊を更に防ぐことができるので、弾性力が少なく局部的に応力がかかると脆くて折れやすいがコストの安い樹脂材料を用いて製品のコストダウンを図ることができるという効果がある。
【００５５】
請求項６の発明は、請求項３記載の発明において、前記ばね保持部の立壁と延設片との隅部にアールを設けたので、請求項５記載の発明と同様に、前記立壁と前記延設片との隅部の肉厚が増すことで前記ばね保持部の強度が増し、弾性力が少なく局部的に応力がかかると脆く折れやすい物性をもった樹脂材料を用いて前記ばね取付部を形成し前記ばね保持部に応力がかかった場合でも、前記ばね保持部の破壊を更に防ぐことができるので、弾性力が少なく局部的に応力がかかると脆くて折れやすいがコストの安い樹脂材料を用いて製品のコストダウンを図ることができるという効果がある。
【図面の簡単な説明】
【図１】（ａ）実施形態１の埋め込み型照明器具のばね取付部の平面断面図である。
（ｂ）同上の正面図である。
（ｃ）同上の側面断面図である。
【図２】（ａ）実施形態２の埋め込み型照明器具のばね取付部の平面断面図である。
（ｂ）同上の正面図である。
（ｃ）同上の側面断面図である。
【図３】（ａ）実施形態３の埋め込み型照明器具のばね取付部の平面断面図である。
（ｂ）同上の正面図である。
【図４】同上でばね取付部に応力がかかる様子を示した説明図である。
【図５】実施形態４の埋め込み型照明器具のばね取付部の平面断面図である。
【図６】同上の強度を測定する様子を説明する説明図である。
【図７】実施形態５の埋め込み型照明器具のばね取付部の平面断面図である。
【図８】同上の別の形状をしたばね取付部の平面断面図である。
【図９】従来の埋め込み型照明器具の外観図である。
【図１０】（ａ）同上のばね取付部の平面断面図である。
（ｂ）同上の正面図である。
（ｃ）同上の側面断面図である。
【図１１】（ａ）同上の取付ばねの側面図である。
（ｂ）同上でばね取付部に取付ばねを取り付けた状態を説明する説明図である。
【符号の説明】
１器具本体
１ａ外鍔部
１ｂ〜１ｇばね取付部
２取付ばね
１０ばね保持部
１０ａ立壁
１０ｂ延設片
１０ｃ補強壁
１１ばね支えリブ
１２抜け防止爪[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an embedded lighting fixture.
[0002]
[Prior art]
2. Description of the Related Art There has been provided an embedded lighting fixture (so-called downlight) that is used by inserting a fixture main body into an embedded hole provided on a mounting surface such as a ceiling.
[0003]
As a method of fixing the fixture main body of these embedded lighting fixtures to the mounting surface, one end of a mounting spring that is elastic and bent into a substantially V shape is attached to the side surface of the fixture main body, and the other end is obliquely outward of the fixture main body. Install the mounting spring so that it protrudes upward, insert the instrument body into the embedding hole with the mounting spring elastically deformed so that the other end of the mounting spring enters the embedding hole, and use the restoring force of the mounting spring In addition, there is a method of holding and fixing the mounting surface between the mounting spring and the flange provided at the lower end of the instrument body (see, for example, Patent Documents 1 to 3).
[0004]
An example of a conventional embedded luminaire using the above-described fixing method to the mounting surface is shown in FIG. The embedded lighting fixture is inserted into an embedded hole (not shown) provided on an attachment surface such as a ceiling, and is attached by contacting an outer flange portion 1a provided at a lower end with an attachment lower surface around the embedded hole. Instrument body 1, a spring mounting portion 1b provided below the outer surface of the instrument body 1, and two

mounting springs

2 and 2 having elasticity.
[0005]
The appliance body 1 is provided with a lamp socket 3 at the upper end, a top plate 4 extending in the lateral direction above the lamp socket 3, and a ballast 5 attached to the top plate 4.
[0006]
The attachment spring 2 is provided such that one end portion 2a is fixed to the spring attachment portion 1b and the other end portion 2b bent in a substantially V shape protrudes obliquely upward to the outside of the instrument body 1.
[0007]
The embedded lighting fixture having the above-described configuration is formed by elastically deforming the

mounting springs

2 and 2 toward the fixture body 1 so that the

other end portions

2b and 2b of the

mounting springs

2 and 2 enter the embedded holes. The outer flange portion 1a abuts against the lower mounting surface around the embedding hole and the

mounting springs

2 and 2 are engaged with the inner peripheral edge of the embedding hole. And the mounting surface is clamped and fixed.
[0008]
Here, the spring mounting portion 1b will be described in further detail.
[0009]
As shown in FIG. 10, the spring mounting portion 1 b supports a pair of

spring holding portions

10 and 10 that hold the surface of the mounting spring 2 on the side opposite to the device body 1, and the surface of the mounting spring 2 on the device body 1 side. It comprises two

spring support ribs

11 and 11 and a removal preventing claw 12 which is provided on the center line x of the pair of

spring holding portions

10 and 10 and prevents the attachment spring 2 inserted into the spring attachment portion 1b from coming off. .
[0010]
The

spring holding portions

10, 10 have an interval slightly wider than the width of the one end 2 a of the mounting spring 2 in the horizontal direction so as to be parallel to both side ends along the longitudinal direction of the one end 2 a of the mounting spring 2. It has a pair of standing

walls

10a and 10a arranged side by side, and extending

pieces

10b and 10b are extended from the front end along the longitudinal direction of each standing

wall

10a and 10a toward the facing standing wall 10a.
[0011]
The

spring support ribs

11 and 11 are formed in an elongated shape so as to be parallel to the longitudinal direction of the standing wall 10a. The

spring support ribs

11 and 11 are connected to the center line x between the pair of standing

walls

10a and 10a and the respective standing

walls

10a and 10a. It is provided at a position near the center line x with respect to 10a.
[0012]
As shown in FIG. 11, the spring mounting portion 1 b configured as described above includes one end portion 2 a of the mounting spring 2, the back surfaces of the extended

pieces

10 b and 10 b of the

spring holding portions

10 and 10, and the spring support rib 11. It is inserted from above between the front of the. The mounting spring 2 once inserted has an elastic piece 2c whose tip is bent in a substantially square shape toward the instrument body 1 at the center of the spring plate forming the one end 2a. And the lower surface of the removal prevention claw 12 are engaged, so that the attachment spring 2 is prevented from coming off.
[0013]
[Patent Document 1]
JP-A-8-124419 [Patent Document 2]
JP-A-9-134611 [Patent Document 3]
JP-A-4-62709
[Problems to be solved by the invention]
However, in the case of an embedded luminaire of the type in which the light source is provided in a horizontal state, when the luminaire is installed, the luminaire is rotated with the attachment spring 2 attached to the attachment surface in order to align the direction of the light source. In this case, a force in a twisting direction is applied to the mounting spring 2, and the stress is applied to the spring mounting portion 1 b that fixes the mounting spring 2. For this reason, when the spring mounting portion 1b as in the conventional example is formed using a resin material having a low elastic force and a brittle and easy-to-break property when locally stressed, the lighting fixture is attached to the mounting surface. If stress is applied to the spring mounting portion 1b by rotating and adjusting the position, etc., the spring mounting portion 1b may be broken. Therefore, even if the cost is low, it is brittle if the stress is low and the stress is applied locally. There is a problem that the resin material having the physical property that is easily broken cannot be used for forming the embedded lighting fixture having the spring mounting portion 1b.
[0015]
The present invention has been made in view of the above-mentioned problems, and the object of the present invention is to reduce the cost by using a low-cost resin material that is fragile and easy to break when subjected to local stress. It is an object of the present invention to provide an embedded luminaire that can achieve the above.
[0016]
[Means for Solving the Problems]
In order to achieve the above object, the invention of claim 1 is attached by inserting an outer flange portion provided at a lower end into a mounting lower surface around the embedded hole and being inserted into an embedded hole provided in the mounting surface. An instrument body, a spring attachment portion provided below the outer surface of the instrument body, and a plurality of attachments in which one end portion is fixed to the spring attachment portion and the instrument body is fixed to the attachment surface by the elastic force of the other end portion. A pair of upright walls with a predetermined interval in the horizontal direction so as to be parallel to both side ends along the longitudinal direction of one end portion of the mounting spring. A spring holding portion for holding a surface of the mounting spring opposite to the device body with an extending piece extending from the front end along the longitudinal direction of the standing wall toward the facing standing wall; and between the pair of standing walls A spring support for supporting the surface of the mounting spring on the device body side And a rib, the lower end of the extending piece of the spring holding portion, and as having a reinforcing wall connected integrally with the outer surface of the instrument body and the standing wall and said extension piece.
[0017]
According to a second aspect of the present invention, in the first aspect of the present invention, a rib extending perpendicularly to the reinforcing wall and connecting the reinforcing wall and the outer surface of the instrument body extends from the lower surface of the reinforcing wall.
[0018]
According to a third aspect of the present invention, in the second aspect of the present invention, the two spring support ribs parallel to the longitudinal direction of the upright wall are provided, and the respective spring support ribs are respectively connected to the center line between the pair of upright walls. It was assumed to be provided at a position near the standing wall between the standing wall.
[0019]
According to a fourth aspect of the present invention, in the invention of the third aspect, the extension piece of the spring holding portion is formed thick.
[0020]
The invention according to claim 5 is the invention according to claim 3, wherein corners of the standing wall and the extending piece of the spring holding portion are formed obliquely with respect to both surfaces of the standing wall and the extending piece. .
[0021]
According to a sixth aspect of the present invention, in the third aspect of the present invention, a radius is provided at the corner between the standing wall and the extending piece of the spring holding portion.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described below with reference to Embodiments 1 to 5.
[0023]
(Embodiment 1)
The embedded lighting fixture of this embodiment is characterized in that a spring mounting portion 1c is provided instead of the spring mounting portion 1b of the conventional embedded lighting fixture shown in FIGS. 9 to 11, and the other fixture main body. Since the basic configurations such as 1 and the mounting spring 2 are the same as those in the conventional example, the same reference numerals are given to the common parts and the description thereof is omitted.
[0024]
In addition, although the above-mentioned conventional embedded type lighting fixture provided the lamp socket 3 in the upper end part of the fixture main body 1, the type of the embedded type lighting fixture which provided the lamp socket 3 in the horizontal state may be sufficient.
[0025]
In FIG. 1, the spring attaching part 1c of this embodiment is shown. Compared with the conventional spring mounting portion 1b of FIG. 10, the spring mounting portion 1c is provided at the lower end of each of the

extended pieces

10b, 10b of the pair of

spring holding portions

10, 10, at the extended piece 10b and the standing wall 10a. This is characterized in that a reinforcing wall 10c that integrally connects the outer surface of the instrument main body 1 is provided.
[0026]
Further, similarly to the conventional spring mounting portion 1b, the two

spring support ribs

11, 11 are formed to be elongated so as to be parallel to the longitudinal direction of the standing wall 10a, and each of the

spring support ribs

11, 11 is a pair of standing walls. Between the center line x between 10a and 10a and the

respective standing walls

10a and 10a, it is provided at a position near the center line x, and on the center line x, the mounting spring 2 inserted into the spring mounting portion 1c is provided. An omission prevention claw 12 is provided to prevent the omission.
[0027]
In the embedded luminaire provided with such a spring mounting portion 1c, the spring mounting portion 1c is formed using a resin material having a low elastic force and having a physical property that is brittle and easily broken when a local stress is applied. Even when stress is applied to the spring mounting portion 1c by rotating the instrument body 1 in a state where it is attached to the surface, the strength of the spring holding portion 10 is increased by providing the reinforcing wall 1, Since breakage of the spring holding portion 10 can be prevented, it is possible to reduce the cost of the product by using a low-cost resin material that is fragile and easily broken when subjected to local stress with little elasticity.
[0028]
(Embodiment 2)
Since the basic configuration in the present embodiment is the same as that in the first embodiment, common portions are denoted by the same reference numerals and description thereof is omitted, and only the portions that are characteristic of the present embodiment will be described in detail.
[0029]
That is, the embedded lighting fixture of the present embodiment is the same as that of the embedded lighting fixture of the first embodiment, as shown in FIG. 2, from the lower surface of the reinforcing wall 10c of the spring mounting portion 1c. It is characterized in that a rib 10d that connects the wall 10c and the outer surface of the instrument body 1 is extended.
[0030]
In the embedded lighting fixture provided with the spring mounting portion 1d, the strength of the spring holding portion 10 is further increased from that of the first embodiment, and even when the spring mounting portion 1d is stressed, the spring mounting portion 1d is prevented from being broken. Therefore, it is possible to reduce the cost of the product by using a low-cost resin material that is fragile and easily broken when subjected to local stress with little elasticity.
[0031]
(Embodiment 3)
Since the basic configuration of the present embodiment is the same as that of the second embodiment, common portions are denoted by the same reference numerals, description thereof is omitted, and only the portions that characterize the present embodiment are described in detail.
[0032]
In other words, in the embedded lighting fixture of the second embodiment, the embedded lighting fixture of the second embodiment is closer to the center line x between the center line x between the pair of standing

walls

10a and 10a and the

respective standing walls

10a and 10a. As shown in FIG. 3, the two

spring support ribs

11, 11 provided at the position of FIG. 3 are widened so that the center line x between the pair of standing

walls

10 a, 10 a and the center line x are respectively provided. It is characterized in that it is provided at a position close to each of the standing walls 10a between the standing

walls

10a and 10a.
[0033]
As shown in FIG. 4, when the fixture body 1 is turned in the direction of the arrow y1 with the embedded lighting fixture attached to the attachment surface, a force in the direction of twisting the attachment spring 2 is applied, and the attachment spring 2 holds the spring. A stress indicated by an arrow y2 is applied to the portion 10 with the front surface 11a of the spring support rib 11 on the rotation direction side as a fulcrum, and a portion z surrounded by a broken line of the spring holding portion 10 on the opposite side to the rotation direction is broken. Resulting in.
[0034]
Therefore, by providing the two

spring support ribs

11 and 11 with an increased interval, the fulcrum of the stress applied to the spring holding part 10 when a force is applied to the mounting spring 2 is shifted, and the stress applied to the spring holding part 10 Is reduced.
[0035]
In the embedded lighting fixture provided with such a spring mounting portion 1e, even if stress is applied to the spring mounting portion 1e by adjusting the position of the fixture main body 1 while being mounted on the mounting surface, the spring support rib is provided. Since the stress applied to the spring holding portion 10 is reduced by widening the distance between 11 and 11, and the spring holding portion 10 can be further prevented from being broken, the elastic force is low and the portion is stressed and is fragile and easily broken. However, the cost of the product can be reduced by using a low-cost resin material.
[0036]
(Embodiment 4)
Since the basic configuration in the present embodiment is the same as that in the third embodiment, common portions are denoted by the same reference numerals, description thereof is omitted, and only portions that are characteristic of the present embodiment are described in detail.
[0037]
That is, the embedded lighting fixture of this embodiment is the same as that of the embedded lighting fixture of the third embodiment, as shown in FIG. 5, the extended piece 10 b that holds the surface of the mounting spring 2 opposite to the fixture body 1. The feature is that it is thick.
[0038]
For example, when the thickness of the extended piece 10b of the third embodiment is 1.5 mm, the thickness of the extended piece of the present embodiment is 2.2 mm.
[0039]
In the embedded luminaire provided with such a spring mounting portion 1f, as shown in FIG. 4, the strength of the extended piece 10b that receives stress from the mounting spring 2 increases, and even when the spring mounting portion 1f is stressed. Further, since it is possible to further prevent the spring mounting portion 1f from being broken, it is possible to reduce the cost of the product by using a low-cost resin material that is fragile and easily broken when subjected to local stress with little elasticity.
[0040]
In addition, the result of having compared the intensity | strength of each spring mounting part of the embedded lighting fixture provided with the spring mounting part 1f of this embodiment and the embedded lighting fixture provided with the spring mounting part 1b shown in the prior art is shown. It is shown in 1.
[0041]
As an experimental method, PBT (polybutylene terephthalate) is used as an example of a resin material that has been used conventionally, and SPS (syndiotactic) is an example of a resin material that has low elasticity and is easily broken when subjected to local stress. Polystyrene) and an embedded lighting fixture having a conventional spring mounting portion 1b formed using PBT, an embedded lighting fixture having a conventional spring mounting portion 1b formed using SPS, and an SPS. As shown in FIG. 6, the embedded lighting fixture having the spring mounting portion 1f of the present embodiment formed by grasping the tip (other end portion) 2b of each mounting spring 2 in the direction of the arrow y3 (either left or right) The stress value when the spring mounting portion was broken was measured by applying a force to the spring mounting portion so that stress was applied to the spring mounting portion.
[0042]
In the experiment, an embedded lighting fixture in which the lamp socket 3 is provided in a horizontal state is used. In FIG. 6, 6 is a fluorescent lamp, and 7 is an electronic starter.
[0043]
[Table 1]

[0044]
From Table 1, if the lighting fixture provided with the conventional spring mounting part 1b is formed using SPS, the spring mounting part 1b will be destroyed with a stress value less than half compared with the time of forming using PBT. In the case of the lighting fixture provided with the spring mounting portion 1f of the present embodiment, even if formed using SPS, the stress is equal to or greater than that of the lighting fixture including the conventional spring mounting portion 1b formed using the conventional PBT. It can be confirmed that the spring mounting portion 1f is not broken up to the value and the strength is improved.
[0045]
Therefore, if the stress is low and local stress is applied, the lighting fixture is formed using a resin material that is brittle and easily broken, but can be reduced in cost.
[0046]
(Embodiment 5)
Since the basic configuration in the present embodiment is the same as that in the third embodiment, common portions are denoted by the same reference numerals, description thereof is omitted, and only the portions that are characteristic of the present embodiment will be described in detail.
[0047]
In other words, the embedded lighting fixture of the present embodiment is the same as that of the embedded lighting fixture of the third embodiment, as shown in FIG. 7 at the corners of the standing wall 10a and the extended piece 10b that form the spring holding portion 10. It is characterized in that it is formed so as to be inclined with respect to both surfaces of the upright wall 10a and the extended piece 10b.
[0048]
In the embedded lighting fixture provided with the spring mounting portion 1g, as shown in FIG. 4, the thickness of the corner (corner portion) between the extending piece 10b receiving the stress from the mounting spring 2 and the standing wall 10a is increased. Since the strength of the spring holding portion 10 is increased, even when a stress is applied to the spring mounting portion 1g, the spring mounting portion 1g can be further prevented from being broken. The cost of the product can be reduced by using a resin material that is easy but cheap.
[0049]
In addition, as a shape for increasing the thickness of the corners of the extended piece 10b and the standing wall 10a, as shown in FIG. 8, a shape provided in the corners of the standing wall 10a and the extended piece 10b may be provided. Also in this case, the strength of the spring holding portion 10 is increased, and if the stress is low and the stress is applied locally, it is brittle and easily broken, but the cost of the product can be reduced by using a low-cost resin material.
[0050]
【The invention's effect】
According to a first aspect of the present invention, there is provided an instrument main body which is inserted into an embedding hole provided on an attachment surface and is attached with an outer flange provided at a lower end in contact with an attachment lower surface around the embedding hole, and the instrument main body A spring mounting portion provided on the lower side of the spring, and a plurality of mounting springs having one end fixed to the spring mounting portion and fixing the instrument body to the mounting surface by the elastic force of the other end. The front end of each of the standing springs along the longitudinal direction has a pair of standing walls arranged in parallel with a predetermined interval in the horizontal direction so as to be parallel to both side ends along the longitudinal direction of one end of the mounting spring. A spring holding portion that holds the surface of the mounting spring opposite to the body of the mounting spring with an extending piece extending from the mounting spring toward the facing wall, and the mounting spring provided between the pair of vertical walls A spring support rib for supporting the body side surface, Since the reinforcing wall that integrally connects the extending piece, the standing wall, and the outer surface of the instrument body is provided at the lower end of the extending piece of the part, the strength of the spring holding part is provided by providing the reinforcing wall. The spring mounting portion is formed by using a resin material having a physical property that is brittle and easily breaks when stress is applied locally due to less elastic force and the spring holding portion is broken even when stress is applied to the spring mounting portion. Therefore, there is an effect that the cost can be reduced by using a low-cost resin material that is fragile and breaks easily when stress is locally applied with little elasticity.
[0051]
According to a second aspect of the present invention, in the first aspect of the present invention, the rib extending from the lower surface of the reinforcing wall perpendicular to the reinforcing wall and connecting the reinforcing wall and the outer surface of the instrument body is provided. Even if the strength of the holding part is further increased and the spring mounting part is formed using a resin material having physical properties that are brittle and easily broken when stress is applied locally with little elastic force, Since it is possible to further prevent the spring mounting portion from being broken, there is an effect that it is possible to reduce the cost of the product by using a low-cost resin material that is fragile and easily broken when the stress is low and the stress is locally applied. is there.
[0052]
According to a third aspect of the present invention, in the second aspect of the present invention, the two spring support ribs parallel to the longitudinal direction of the upright wall are provided, and the respective spring support ribs are respectively connected to the center line between the pair of upright walls. The spring mounting portion is formed by using a resin material having a low elastic force and a brittle and easy-to-break property when locally stressed. Even when stress is applied to the spring holding portion from the mounting spring with the support rib as a fulcrum, the fulcrum of stress applied to the spring holding portion is shifted by providing a gap between the two spring support ribs. Since the stress applied to the spring holding part is reduced and the damage of the spring holding part can be further prevented, it is brittle and easy to break when subjected to local stress with little elastic force. Costda There is an effect that it is possible to reduce the emissions.
[0053]
According to a fourth aspect of the invention, in the invention of the third aspect, since the extension piece of the spring holding portion is formed thick, the strength of the spring holding portion is increased, the elastic force is small, and a local stress is applied. Even when the spring mounting part is formed using a resin material having brittle and easy-to-break physical properties and stress is applied to the spring holding part, the spring holding part can be further prevented from being broken, so the elastic force is small. If stress is applied locally, it is brittle and easily broken, but there is an effect that the cost of the product can be reduced by using a low-cost resin material.
[0054]
According to a fifth aspect of the present invention, in the invention of the third aspect, the corners of the standing wall and the extending piece of the spring holding portion are formed obliquely with respect to both surfaces of the standing wall and the extending piece. The strength of the spring holding part is increased by increasing the thickness of the corners of the standing wall and the extending piece, and the resin material having a physical property that is brittle and easy to break when stress is applied locally with little elasticity. Even when the spring holding portion is formed and stress is applied to the spring holding portion, the spring holding portion can be further prevented from being broken. Therefore, if the stress is low and the stress is applied locally, the spring holding portion is brittle and easily broken. There is an effect that the cost of the product can be reduced by using a cheap resin material.
[0055]
According to a sixth aspect of the invention, in the third aspect of the invention, the corners of the standing wall and the extending piece of the spring holding portion are provided with rounded corners. Therefore, similarly to the fifth aspect of the invention, the standing wall and the The spring mounting part is made of a resin material having a physical property that is brittle and easy to break when subjected to local stress with little elasticity and increased strength by increasing the thickness of the corner with the extended piece. Even when stress is applied to the spring holding portion, the spring holding portion can be further prevented from being broken. Therefore, the resin material is low in elasticity and easily broken when subjected to local stress. There is an effect that the cost of the product can be reduced by using.
[Brief description of the drawings]
FIG. 1 (a) is a plan sectional view of a spring mounting portion of an embedded luminaire according to Embodiment 1. FIG.
(B) It is a front view same as the above.
(C) It is side surface sectional drawing same as the above.
FIG. 2 (a) is a plan sectional view of a spring mounting portion of the embedded luminaire according to the second embodiment.
(B) It is a front view same as the above.
(C) It is side surface sectional drawing same as the above.
FIG. 3 (a) is a plan sectional view of a spring mounting portion of the embedded lighting fixture of Embodiment 3. FIG.
(B) It is a front view same as the above.
FIG. 4 is an explanatory view showing a state in which stress is applied to the spring mounting portion.
5 is a plan cross-sectional view of a spring mounting portion of the embedded lighting fixture of Embodiment 4. FIG.
FIG. 6 is an explanatory diagram for explaining how the intensity is measured.
7 is a cross-sectional plan view of a spring mounting portion of the embedded lighting fixture of Embodiment 5. FIG.
FIG. 8 is a plan sectional view of a spring mounting portion having another shape according to the embodiment.
FIG. 9 is an external view of a conventional embedded lighting fixture.
FIG. 10 (a) is a cross-sectional plan view of the spring mounting portion.
(B) It is a front view same as the above.
(C) It is side surface sectional drawing same as the above.
FIG. 11 (a) is a side view of the above mounting spring.
(B) It is explanatory drawing explaining the state which attached the attachment spring to the spring attachment part same as the above.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Instrument main body 1a Outer collar part 1b-1g Spring attachment part 2 Attachment spring 10 Spring holding part

10a Standing wall

10b Extension piece

10c Reinforcement wall 11 Spring support rib 12 Pull-out prevention claw

Claims

An instrument body that is inserted into an embedding hole provided on the attachment surface and is attached with an outer flange provided at the lower end in contact with an attachment lower surface around the embedding hole, and provided below the outer surface of the instrument body. And a plurality of attachment springs, one end of which is fixed to the spring attachment and the instrument body is fixed to the attachment surface by the elastic force of the other end. A pair of upright walls are juxtaposed in parallel with a predetermined distance in the horizontal direction so as to be parallel to both side ends along the longitudinal direction of one end, and from the front end along the longitudinal direction of each standing wall to the direction of the standing wall facing each other A spring holding portion for holding the surface of the mounting spring opposite to the instrument body with an extending piece extending toward the instrument, and a spring provided between the pair of standing walls and supporting the instrument body side surface of the mounting spring A lower end of the extended piece of the spring holding portion. , Said extension piece and the standing wall implantable luminaire, characterized in that the outer surface provided with a reinforcing wall connected together of the instrument body.

2. The embedded lighting device according to claim 1, wherein a rib extending from the lower surface of the reinforcing wall perpendicular to the reinforcing wall and connecting the reinforcing wall and the outer surface of the device body is provided.

Two spring support ribs parallel to the longitudinal direction of the standing wall are provided, and each spring support rib is provided at a position near the standing wall between the center line between the pair of standing walls and each standing wall. The embedded lighting apparatus according to claim 2, wherein

4. The embedded lighting device according to claim 3, wherein the extension piece of the spring holding portion is formed thick.

The embedded lighting device according to claim 3, wherein corners of the standing wall and the extending piece of the spring holding portion are formed obliquely with respect to both surfaces of the standing wall and the extending piece.

The embedded lighting device according to claim 3, wherein a round is provided at a corner between the standing wall and the extending piece of the spring holding portion.