JP4082141B2

JP4082141B2 - Pendant lighting fixture

Info

Publication number: JP4082141B2
Application number: JP2002255488A
Authority: JP
Inventors: 恒福田
Original assignee: Matsushita Electric Works Ltd
Current assignee: Panasonic Electric Works Co Ltd
Priority date: 2002-08-30
Filing date: 2002-08-30
Publication date: 2008-04-30
Anticipated expiration: 2022-08-30
Also published as: JP2004095368A

Description

【０００１】
【発明の属する技術分野】
本発明は、天井から電源コードにより吊設される吊り下げ形照明器具に関するものである。
【０００２】
【従来の技術】
従来、天井から電源コードにより吊設される吊り下げ形照明器具は、点灯回路を実装した回路基板が絶縁部材を介して金属製の器具本体内に収容されており、器具本体上面に装着されるコードカバー内に電源コードの余長部位を収納するとともに電源コードにコードカバーを支持させることで器具本体が吊設されていた（特開平５−３０７９０８号公報参照）。
【０００３】
【発明が解決しようとする課題】
ところで、器具本体にはランプが着脱自在に装着されるソケットが設けられるが、このソケットやソケットに装着されるランプの口金等により重量バランスが崩れて器具本体を水平に保つことができなくなる虞があった。そのために従来は、金属製の重りを器具本体内に収納し、重りによって重量バランスを調整することで器具本体を水平に保つようにしていた。しかしながら、このような重りを用いると部品点数の増加によるコスト上昇を招くという問題があった。
【０００４】
本発明は上記事情に鑑みて為されたものであり、その目的は、器具本体の重量バランスを調整するための部品を不要として部品点数の削減によるコストダウンを図った吊り下げ形照明器具を提供することにある。
【０００５】
【課題を解決するための手段】
請求項１の発明は、上記目的を達成するために、天井から電源コードにより吊設される吊り下げ形照明器具であって、ランプが着脱自在に装着されるソケットと、ランプを点灯する点灯回路が実装された回路基板と、ソケットが取り付けられるとともに内部に点灯回路が収納される金属製の器具本体と、器具本体と回路基板の間に介装されて器具本体から点灯回路を絶縁する合成樹脂製の絶縁部材と、器具本体の上面に設けられ電源コードの余長部位を内部に収容するとともに電源コードに支持されるコードカバーとを備え、器具本体における電源コードによって吊り下げられる位置を挟んでソケットと反対側の位置に絶縁部材を配置したことを特徴とする。
【０００６】
請求項２の発明は、請求項１の発明において、金属製の重りが適宜収納可能な収納部を絶縁部材に設けたことを特徴とする。
【０００７】
請求項３の発明は、請求項１又は２の発明において、コードカバーの下端縁に嵌合片を設けるとともに器具本体上面と略平行な面内でコードカバーを回転させることによりコードカバーの嵌合片が嵌合する嵌合部を器具本体の上面より突設してなり、器具本体上面に設けた窓孔を通して器具本体外に進退自在に突出し器具本体外に突出した状態において嵌合部に嵌合した嵌合片が反嵌合方向に移動するのを規制する規制部を絶縁部材に設けたことを特徴とする。
【０００８】
請求項４の発明は、請求項１又は２又は３の発明において、点灯回路をオン・オフするスイッチ並びに電源コードが接続される電源コネクタを具備するスイッチブロックを備え、回路基板の下面に実装したコネクタとスイッチブロックの上面に設けたコネクタを接続してスイッチ及び電源コードを点灯回路と接続してなり、回路基板上面のコネクタに対向する位置又はその近傍に当接して回路基板を支持する突起を絶縁部材に設けたことを特徴とする。
【０００９】
【発明の実施の形態】
以下、図１〜図９を参照して本発明の実施形態を詳細に説明する。
【００１０】
金属製の器具本体１は下面が開口する有底の短円筒形であって、開口端縁には外鍔１ａが形成されており、下面開口が金属製の本体カバー２によって閉塞される。本体カバー２は器具本体１と同様に上面が開口するとともに開口端縁に外鍔２ａが設けられた有底の短円筒形に形成されており、外鍔１ａ，２ａ同士を当接してねじ止め等の適宜の手段で器具本体１に取り付けられる（図３参照）。器具本体１の内部、すなわち器具本体１と本体カバー２によって形成される空間には、環形の蛍光ランプ３Ａ，３Ｂ並びに後述する豆球９を点灯するための点灯回路を構成する部品が実装された回路基板４と、回路基板４と器具本体１との間に介装されて回路基板４に実装される部品や導電パターンと器具本体１の絶縁距離を確保する絶縁部材５とが収納される。
【００１１】
回路基板４は矩形のプリント配線板からなり、図１に示すように略中央にはスイッチブロック６を取り付けるための取付孔４ａが形成されている。また、回路基板４の一端側からは各一対の電線７が引き出されており、これら一対の電線７の先端には蛍光ランプ３Ａ，３Ｂの口金（図示せず）と着脱自在に接続されるソケット８が取り付けられている。
【００１２】
スイッチブロック６は、点灯回路による蛍光ランプ３Ａ，３Ｂ並びに豆球９の点灯・消灯を切り換えるスイッチと、電源コード１０の下端に取り付けられた電源コネクタ１０ａが差込接続される受け側の電源コネクタ６ａと、スイッチ及び電源コネクタ６ａを点灯回路に接続するためのコネクタ６ｂと、豆球９が装着される豆球用のソケット６ｅ（図４参照）とが合成樹脂製のハウジング６ｃに収納されてなり、ハウジング６ｃを上下方向に貫通する一対のねじ挿通孔６ｄに下方から挿通した固定ねじ１１を器具本体１の底面に設けた一対のねじ孔１ｂに螺合することで器具本体１に固定される。また、図２及び図４に示すようにハウジング６ｃの下面中央にはスイッチを操作するための操作片６ｆが、本体カバー２の底面中央に設けられた挿通孔２ｂを通して下方へ突出させてあり、この操作片６ｆに接続された引き紐１２を引き操作することにより、蛍光ランプ３Ａ，３Ｂ及び豆球９を点灯・消灯させることができる。また、本体カバー２底面の挿通孔２ｂ近傍にはスイッチブロック６のソケット６ｅに装着される豆球９を露出させる露出窓２ｃが設けてある。なお、回路基板４の取付孔４ａ近傍にはスイッチブロック６のコネクタ６ｂと接続する受け側のコネクタ４ｂが実装されており、スイッチブロック６を器具本体１に固定する際にコネクタ６ｂと受け側のコネクタ４ｂが接続されるようになっている。ここで、器具本体１の底面中央には取付孔４ａに対応する矩形の開口窓１ｃが形成されており、この開口窓１ｃを通してスイッチブロック６の電源コネクタ６ａが器具本体１の上面に露出させてある（図３参照）。
【００１３】
図２に示すように、器具本体１の端部には合成樹脂成型品からなるソケットカバー１３が取り付けられている。ソケットカバー１３は器具本体１に固定される主部１３ａと、主部１３ａから二股に分かれて側方へ突出する一対の腕部１３ｂと、各腕部１３ｂの先端に設けられて蛍光ランプ３Ａ，３Ｂを把持する把持部１３ｃとを有し、主部１３ａ並びに腕部１３ｂの内部に電線７が挿通されるとともに把持部１３ｃの腕部１３ｂとの連結部位からソケット８の先端部が露出されている。すなわち、蛍光ランプ３Ａ，３Ｂの口金をソケット８に接続した状態でソケットカバー１３の把持部１３ｃに蛍光ランプ３Ａ，３Ｂが把持されることになる。なお、本体カバー２の端部にはソケットカバー１３に対応する切り欠き溝（図示せず）が形成されており、この切り欠き溝を通してソケットカバー１３が器具本体１及び本体カバー２の外側へ突出させてある。
【００１４】
一方、本体カバー２の外鍔２ａにおけるスイッチブロック６を挟んでソケットカバー１３と反対側の位置には蛍光ランプ３Ａ，３Ｂを支持する支持ばね１４がねじ止めによって取り付けられている。つまり、この支持ばね１４とソケットカバー１３の把持部１３ｃとで蛍光ランプ３Ａ，３Ｂが器具本体１に保持されることになる。
【００１５】
絶縁部材５は、図５に示すように略し字形の底板５ａと、底板５ａの周縁より全周に渡って上方へ突出した周壁５ｂとが絶縁性を有する合成樹脂によって一体に形成されてなる。絶縁部材５の一端部には、周壁５ｂから上方並びに側方へ突出し、器具本体１の底面に設けられた係止孔１ｄに挿入係止する係止片５ｃが突設されている。また、絶縁部材５の底板５ａの略中央部には、下面側に開口した有底円筒形のボス部５ｄが上方へ突設され、ボス部５ｄの中央にはねじ挿通孔５ｅが貫設されている。すなわち、器具本体１の係止孔１ｄに係止片５ｃを挿入係止するとともにねじ挿通孔５ｅに挿通した固定ねじ１５を器具本体１の底面に形成されたねじ孔１ｅに螺合することで絶縁部材５が器具本体１に固定される。ここで、絶縁部材５は、器具本体１における電源コード１０によって吊り下げられる位置（＝開口窓１ｃの位置）を挟んでソケット８（ソケットカバー１３）と反対側の位置、つまり支持ばね１４の近傍に配置される（図１及び図３参照）。このように器具本体１におけるソケット８と反対側の位置に絶縁部材５を配置することにより、絶縁部材５の重量で器具本体１の重量バランスをとって器具本体１を水平に保つことができ、絶縁部材５で重量バランスを調整するため、従来の重りが不要となって部品点数の削減によるコストダウンが図れる。なお、絶縁部材５は底板５ａと周壁５ｂで囲まれた空間（収納部）５ｆを有しており、図１に示すように必要に応じて従来と同様に重り１６を使って重量バランスを調整することも可能であって、しかも、重り１６を使う場合でも絶縁部材５に設けた収納部５ｆに重り１６を収納すればよいから調整が簡単に行えるという利点がある。
【００１６】
また、絶縁部材５の底板５ａには、図４及び図５に示すように回路基板４に実装されている受け側のコネクタ４ｂと対向する位置に下方へ突出する略円錐台形の突起５ｍが突設されている。すなわち、器具本体１に絶縁部材５を取り付けて器具本体１の内部に回路基板４が収納された状態では、絶縁部材５の突起５ｍが回路基板４の上面における受け側のコネクタ４ｂに対向する位置の近傍に当接して支持しているから、スイッチブロック６を回路基板４に取り付ける際に突起５ｍによって回路基板４の撓みを抑えることができ、両者のコネクタ６ｂ，４ｂ同士が容易に接続できてコネクタ６ｂ，４ｂの接続不良の発生が防止できるものである。
【００１７】
ところで、図１に示すように器具本体１の上面には電源コード１０の余長部位を内部に収容するとともに電源コード１０に支持される金属製のコードカバー１７が着脱自在に取り付けられる。コードカバー１７は底面（下面）が開口する略円錐台形に形成され、天面（上面）には電源コード１０を導入するための丸孔１７ａが設けてある。図７に示すように電源コード１０の一端部は引掛シーリングキャップ１８と接続され、他端部には既に説明したように電源コネクタ１０ａが接続され、さらに引掛シーリングキャップ１８と電源コネクタ１０ａの間にコードアジャスタ１９が外挿されている。このコードアジャスタ１９は従来周知であって、電源コード１０の任意の位置に固定することが可能である。したがって、コードカバー１７の丸孔１７ａにコードアジャスタ１９を嵌合固定し、電源コード１０に対するコードアジャスタ１９の固定位置を変えることで引掛シーリングキャップ１８から器具本体１までの距離を調整することができ、調整によって余った電源コード１０の余長部位がコードカバー１７内に収納されるようになっている。
【００１８】
次に、コードカバー１７を器具本体１の上面に着脱自在に取り付けるための取付構造について説明する。
【００１９】
図１に示すようにコードカバー１７の下端縁には外側に突出する複数（本実施形態では３つ）の嵌合片１７ｂがほぼ等間隔に設けられている。一方、器具本体１の上面には、コードカバー１７の各嵌合片１７ｂが嵌合する複数（本実施形態では３つ）の嵌合部１ｆが突設されている。これらの嵌合部１ｆは、器具本体１の底面を切り起こして折曲することにより断面形状が略鉤形で全体が略円弧状に形成され、一端側が開放し他端側が閉塞されている。すなわち、器具本体１の上面と略平行な面内でコードカバー１７を回転させることにより、コードカバー１７の嵌合片１７ｂが器具本体１の嵌合部１ｆの開放した端部から挿入され、図３に示すように嵌合片１７ｂと嵌合部１ｆが嵌合して器具本体１にコードカバー１７が固定される。また、器具本体１に固定されたコードカバー１７を反対向きに回転すれば、コードカバー１７の嵌合片１７ｂが開放した端部から嵌合部１ｆの外へ退出して嵌合片１７ｂと嵌合部１ｆの嵌合が外れ、コードカバー１７を器具本体１から取り外すことができる。
【００２０】
ここで、コードカバー１７が不用意に回転して嵌合片１７ｂと嵌合部１ｆの嵌合が外れてしまうと電源コード１０の下端に接続されている電源コネクタ１０ａ及びスイッチブロック６の電源コネクタ６ａに器具本体１や蛍光ランプ３Ａ，３Ｂを含む器具の荷重がかかり、最悪の場合には電源コネクタ１０ａ，６ａが外れて器具が落下してしまう虞がある。そのために本実施形態では、器具本体１の上面に設けた窓孔１ｇを通して器具本体１の外に進退自在に突出し、器具本体１の外に突出した状態において嵌合部１ｆに嵌合した嵌合片１７ｂが反嵌合方向に移動するのを規制する規制部５ｇを絶縁部材５に設けている。
【００２１】
規制部５ｇは、図５及び図６に示すように全体が略矩形箱形であって、一端側で絶縁部材５に片持ち支持されて上下方向（絶縁部材５の底板５ａを貫通する方向）に撓み自在に形成された撓み片５ｈの先端部から上方へ突設されている。また、規制部５ｇの上面には操作時における滑り止めとして複数の突条５ｉが列設され、規制部５ｇの上面から側面にかけては外側に向かって下方へ傾斜する傾斜面５ｊが形成されている（図５（ｂ）参照）。さらに、規制部５ｇの裏面（下面）には、回路基板４に当接することで撓み片５ｈの撓み量を規制するためのリブ５ｋが下方へ突設されている。したがって、絶縁部材５を器具本体１に取り付けた状態では器具本体１の上面に設けた窓孔１ｇから規制部５ｇが突出し、突条５ｉの部分を指で押すと撓み片５ｈが撓んで規制部５ｇが窓孔１ｇを通して器具本体１の中へ進入し、指を離せば撓み片５ｈが元の状態に復帰して規制部５ｇが窓孔１ｇから器具本体１の外へ突出することになる。
【００２２】
而して、器具本体１の上面と略平行な面内でコードカバー１７を回転させると、図８に示すようにコードカバー１７の嵌合片１７ｂが窓孔１ｇから突出している規制部５ｇの傾斜面５ｊに摺接して規制部５ｇに下向きの力が作用し、この力で撓み片５ｈが下方に撓んで規制部５ｇが窓孔１ｇを通して器具本体１の中へ進入するから、嵌合片５ｇが器具本体１の嵌合部１ｆの開放した端部から挿入されて嵌合片１７ｂと嵌合部１ｆが嵌合して器具本体１にコードカバー１７が固定される。そして、嵌合片１７ｂが嵌合部１ｆと嵌合した状態では嵌合片１７ｂによる上記下向きの力が作用しなくなるから、図９に示すように撓み片５ｈが元の状態に復帰して規制部５ｇが窓孔１ｇから器具本体１の外へ突出し、嵌合部１ｆの開放した端部から突出している嵌合片１７ｂに規制部５ｇが当接し、嵌合部１ｆに嵌合した嵌合片１７ｂの反嵌合方向への移動が規制される。このように絶縁部材５に設けた規制部５ｇによって器具本体１の嵌合部１ｆに嵌合したコードカバー１７の嵌合片１７ｂが反嵌合方向に移動するのを規制することによって、嵌合部１ｆと嵌合片１７ｂとの嵌合状態が外れて器具本体１からコードカバー１７が脱落するのを防ぐことができる。また、突条５ｉの部分を指で押して規制部５ｇを窓孔１ｇから器具本体１の中へ進入させれば、規制部５ｇによる規制が解除されてコードカバー１７を反対方向に回転させて嵌合部１ｆと嵌合片１７ｂの嵌合を外し、コードカバー１７を器具本体１から取り外すことができる。ここで、規制部５ｇの下面にリブ５ｋを設けているから、規制部５ｇに下向きの力が作用して撓み片５ｈが撓んだときにリブ５ｋの先端が回路基板４に当接して撓み片５ｈの撓み量が規制され、撓み片５ｈが塑性変形するのを防ぐことができる。
【００２３】
なお、図２に示すように器具本体１にはセード２０が取り付けられる。このセード２０は上面及び下面が開口する椀形に形成され、上面開口の周縁を器具本体１の外鍔１ａ上に載置することで器具本体１に取り付けられる。
【００２４】
【発明の効果】
請求項１の発明は、天井から電源コードにより吊設される吊り下げ形照明器具であって、ランプが着脱自在に装着されるソケットと、ランプを点灯する点灯回路が実装された回路基板と、ソケットが取り付けられるとともに内部に点灯回路が収納される金属製の器具本体と、器具本体と回路基板の間に介装されて器具本体から点灯回路を絶縁する合成樹脂製の絶縁部材と、器具本体の上面に設けられ電源コードの余長部位を内部に収容するとともに電源コードに支持されるコードカバーとを備え、器具本体における電源コードによって吊り下げられる位置を挟んでソケットと反対側の位置に絶縁部材を配置したことを特徴とし、器具本体における電源コードによって吊り下げられる位置を挟んでソケットと反対側の位置に絶縁部材を配置することで器具本体の重量バランスをとって器具本体を水平に保つことができる。すなわち、器具本体と回路基板の間に介装されて器具本体から点灯回路を絶縁する合成樹脂製の絶縁部材で重量バランスを調整するため、従来の重りが不要となって部品点数の削減によるコストダウンが図れる。
【００２５】
請求項２の発明は、請求項１の発明において、金属製の重りが適宜収納可能な収納部を絶縁部材に設けたことを特徴とし、必要に応じて従来と同様に重りを使って重量バランスを調整することも可能であり、しかも、重りを使う場合でも絶縁部材に設けた収納部に重りを収納すればよいから調整が簡単に行える。
【００２６】
請求項３の発明は、請求項１又は２の発明において、コードカバーの下端縁に嵌合片を設けるとともに器具本体上面と略平行な面内でコードカバーを回転させることによりコードカバーの嵌合片が嵌合する嵌合部を器具本体の上面より突設してなり、器具本体上面に設けた窓孔を通して器具本体外に進退自在に突出し器具本体外に突出した状態において嵌合部に嵌合した嵌合片が反嵌合方向に移動するのを規制する規制部を絶縁部材に設けたことを特徴とし、絶縁部材に設けた規制部によって器具本体の嵌合部に嵌合したコードカバーの嵌合片が反嵌合方向に移動するのを規制することにより、嵌合部と嵌合片との嵌合状態が外れて器具本体からコードカバーが脱落するのを防ぐことができる。
【００２７】
請求項４の発明は、請求項１又は２又は３の発明において、点灯回路をオン・オフするスイッチ並びに電源コードが接続される電源コネクタを具備するスイッチブロックを備え、回路基板の下面に実装したコネクタとスイッチブロックの上面に設けたコネクタを接続してスイッチ及び電源コードを点灯回路と接続してなり、回路基板上面のコネクタに対向する位置又はその近傍に当接して回路基板を支持する突起を絶縁部材に設けたことを特徴とし、絶縁部材に設けた突起で回路基板上面のコネクタに対向する位置又はその近傍を支持しているから、スイッチブロックを回路基板に取り付ける際に回路基板の撓みを抑えて両者のコネクタ同士が容易に接続できてコネクタの接続不良の発生が防止できる。
【図面の簡単な説明】
【図１】実施形態を示す一部省略した分解斜視図である。
【図２】同上の断面図である。
【図３】同上におけるコードカバーを外した状態の上面図である。
【図４】同上の一部省略した下面図である。
【図５】同上における絶縁部材を示し、（ａ）は上面図、（ｂ）は側面図、（ｃ）は下面図である。
【図６】同上における絶縁部材の要部を示し、（ａ）は図５におけるＡ−Ａ線断面矢視図、（ｂ）は図５におけるａ−ａ線断面矢視図である。
【図７】同上における電源コードの平面図である。
【図８】コードカバーを器具本体に取り付ける取付作業の説明図である。
【図９】コードカバーを器具本体に取り付ける取付作業の説明図である。
【符号の説明】
１器具本体
４回路基板
５絶縁部材
６スイッチブロック
７電線
８ソケット
１０電源コード
１７コードカバー[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hanging type lighting fixture suspended from a ceiling by a power cord.
[0002]
[Prior art]
Conventionally, a hanging type lighting fixture suspended from a ceiling by a power cord has a circuit board on which a lighting circuit is mounted accommodated in a metal fixture body via an insulating member, and is mounted on the upper surface of the fixture body. The instrument main body is suspended by storing the surplus length portion of the power cord in the cord cover and supporting the cord cover on the power cord (see Japanese Patent Laid-Open No. 5307908).
[0003]
[Problems to be solved by the invention]
By the way, a socket on which the lamp is detachably mounted is provided in the instrument body, but there is a possibility that the instrument body cannot be kept horizontal because the weight balance is lost due to the socket or the base of the lamp mounted on the socket. there were. Therefore, conventionally, a metal weight is stored in the instrument body, and the instrument body is kept horizontal by adjusting the weight balance with the weight. However, when such a weight is used, there is a problem that the cost increases due to an increase in the number of parts.
[0004]
The present invention has been made in view of the above circumstances, and an object thereof is to provide a hanging type lighting apparatus that does not require a part for adjusting the weight balance of the apparatus body and reduces the cost by reducing the number of parts. There is to do.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the invention of claim 1 is a hanging type lighting fixture suspended from a ceiling by a power cord, a socket in which a lamp is detachably mounted, and a lighting circuit for lighting the lamp A circuit board on which a socket is mounted, a metal fixture body in which a socket is attached and a lighting circuit is housed therein, and a synthetic resin interposed between the fixture body and the circuit board to insulate the lighting circuit from the fixture body An insulating member made of metal and a cord cover provided on the upper surface of the instrument body for accommodating the extra length portion of the power cord and supported by the power cord, sandwiching the position where the instrument body is suspended by the power cord An insulating member is arranged at a position opposite to the socket.
[0006]
The invention of claim 2 is characterized in that, in the invention of claim 1, a storage portion capable of appropriately storing a metal weight is provided in the insulating member.
[0007]
The invention of claim 3 is the invention of claim 1 or 2, wherein the cord cover is fitted by providing a fitting piece at the lower end edge of the cord cover and rotating the cord cover in a plane substantially parallel to the upper surface of the instrument body. A fitting part that fits the piece protrudes from the upper surface of the instrument body, and protrudes out of the instrument body through a window hole provided on the upper surface of the instrument body, and fits into the fitting part in a state of projecting out of the instrument body. The insulating member is provided with a restricting portion that restricts the mating fitting piece from moving in the anti-fitting direction.
[0008]
According to a fourth aspect of the present invention, in the first, second or third aspect of the present invention, a switch block including a switch for turning on / off the lighting circuit and a power connector to which the power cord is connected is mounted on the lower surface of the circuit board. A connector and a connector provided on the upper surface of the switch block are connected to connect the switch and the power cord to the lighting circuit, and a projection that supports the circuit board by contacting the connector on the upper surface of the circuit board or in the vicinity thereof. It is provided on the insulating member.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS.
[0010]
The metal instrument main body 1 is a bottomed short cylindrical shape having an open bottom surface, and an outer casing 1a is formed on the opening edge, and the bottom surface opening is closed by a metal main body cover 2. The body cover 2 is formed in a short cylindrical shape with a bottom having an upper surface opened and an outer edge 2a provided at the opening edge similarly to the instrument body 1, and the outer casings 1a and 2a are brought into contact with each other and screwed. It attaches to the instrument main body 1 by appropriate means, such as (refer FIG. 3). In the interior of the instrument main body 1, that is, in the space formed by the instrument main body 1 and the main body cover 2, the components constituting the lighting circuit for lighting the ring-shaped fluorescent lamps 3A and 3B and the bean bulb 9 described later are mounted. The circuit board 4 and an insulating member 5 that is interposed between the circuit board 4 and the instrument body 1 and is mounted on the circuit board 4 and an insulation member 5 that secures an insulation distance between the instrument body 1 are accommodated.
[0011]
The circuit board 4 is formed of a rectangular printed wiring board, and a mounting hole 4a for mounting the switch block 6 is formed in the approximate center as shown in FIG. A pair of electric wires 7 are drawn out from one end of the circuit board 4, and sockets that are detachably connected to the caps (not shown) of the fluorescent lamps 3 </ b> A and 3 </ b> B at the ends of the pair of electric wires 7. 8 is attached.
[0012]
The switch block 6 includes a switch for switching on / off the fluorescent lamps 3A, 3B and the bean bulb 9 by a lighting circuit, and a power connector 6a on the receiving side to which a power connector 10a attached to the lower end of the power cord 10 is plugged in. And a connector 6b for connecting the switch and power supply connector 6a to the lighting circuit and a bean ball socket 6e to which the bean ball 9 is mounted (see FIG. 4) are housed in a synthetic resin housing 6c. The fixing screw 11 inserted from below into a pair of screw insertion holes 6d penetrating the housing 6c in the vertical direction is screwed into a pair of screw holes 1b provided on the bottom surface of the instrument body 1 to be fixed to the instrument body 1. . Further, as shown in FIGS. 2 and 4, an operation piece 6f for operating the switch is projected downward through an insertion hole 2b provided in the center of the bottom surface of the main body cover 2 at the center of the lower surface of the housing 6c. By operating the pull string 12 connected to the operation piece 6f, the fluorescent lamps 3A and 3B and the bean ball 9 can be turned on / off. An exposure window 2c for exposing the bean ball 9 attached to the socket 6e of the switch block 6 is provided in the vicinity of the insertion hole 2b on the bottom surface of the main body cover 2. A receiving connector 4b that is connected to the connector 6b of the switch block 6 is mounted in the vicinity of the mounting hole 4a of the circuit board 4, and when the switch block 6 is fixed to the instrument body 1, the connector 6b and the receiving connector 4b are mounted. A connector 4b is connected. Here, a rectangular opening window 1c corresponding to the mounting hole 4a is formed at the center of the bottom surface of the instrument body 1, and the power connector 6a of the switch block 6 is exposed to the upper surface of the instrument body 1 through the opening window 1c. Yes (see FIG. 3).
[0013]
As shown in FIG. 2, a socket cover 13 made of a synthetic resin molded product is attached to the end of the instrument body 1. The socket cover 13 is provided with a main part 13a fixed to the instrument body 1, a pair of arm parts 13b that are divided into two parts and projecting sideways from the main part 13a, and provided at the tip of each arm part 13b. 3B, the electric wire 7 is inserted into the main portion 13a and the arm portion 13b, and the tip end portion of the socket 8 is exposed from the connecting portion with the arm portion 13b of the holding portion 13c. Yes. That is, the fluorescent lamps 3A and 3B are gripped by the gripping portion 13c of the socket cover 13 with the caps of the fluorescent lamps 3A and 3B connected to the socket 8. A notch groove (not shown) corresponding to the socket cover 13 is formed at the end of the main body cover 2, and the socket cover 13 protrudes outside the instrument main body 1 and the main body cover 2 through the notch groove. I'm allowed.
[0014]
On the other hand, a support spring 14 that supports the fluorescent lamps 3A and 3B is attached by screwing at a position opposite to the socket cover 13 across the switch block 6 in the outer casing 2a of the main body cover 2. That is, the fluorescent lamps 3 </ b> A and 3 </ b> B are held by the instrument body 1 by the support spring 14 and the grip portion 13 c of the socket cover 13.
[0015]
As shown in FIG. 5, the insulating member 5 is formed by integrally forming a bottom plate 5a having an abbreviated shape and a peripheral wall 5b protruding upward from the periphery of the bottom plate 5a over the entire circumference with an insulating synthetic resin. At one end portion of the insulating member 5, a locking piece 5 c that protrudes upward and sideward from the peripheral wall 5 b and is inserted and locked into a locking hole 1 d provided on the bottom surface of the instrument body 1 is projected. In addition, a bottomed cylindrical boss portion 5d that is open to the lower surface is projected upward at a substantially central portion of the bottom plate 5a of the insulating member 5, and a screw insertion hole 5e is formed through the center of the boss portion 5d. ing. That is, the locking piece 5 c is inserted and locked into the locking hole 1 d of the instrument body 1 and the fixing screw 15 inserted through the screw insertion hole 5 e is screwed into the screw hole 1 e formed on the bottom surface of the instrument body 1. The insulating member 5 is fixed to the instrument body 1. Here, the insulating member 5 is positioned on the opposite side of the socket 8 (socket cover 13) across the position (= position of the opening window 1c) suspended by the power cord 10 in the instrument body 1, that is, in the vicinity of the support spring 14. (See FIGS. 1 and 3). Thus, by arranging the insulating member 5 at a position opposite to the socket 8 in the instrument main body 1, the instrument main body 1 can be kept horizontal by balancing the weight of the instrument main body 1 by the weight of the insulating member 5, Since the weight balance is adjusted by the insulating member 5, the conventional weight is unnecessary, and the cost can be reduced by reducing the number of parts. The insulating member 5 has a space (accommodating portion) 5f surrounded by the bottom plate 5a and the peripheral wall 5b. As shown in FIG. 1, the weight balance is adjusted by using the weight 16 as needed as in the prior art. In addition, even when the weight 16 is used, there is an advantage that adjustment can be easily performed because the weight 16 may be stored in the storage portion 5f provided in the insulating member 5.
[0016]
Further, the bottom plate 5a of the insulating member 5 has a substantially frustoconical protrusion 5m protruding downward at a position facing the receiving connector 4b mounted on the circuit board 4 as shown in FIGS. It is installed. That is, in a state where the insulating member 5 is attached to the instrument main body 1 and the circuit board 4 is housed inside the instrument main body 1, the position where the protrusion 5 m of the insulating member 5 faces the receiving-side connector 4 b on the upper surface of the circuit board 4. Since the protrusion 5m can suppress the bending of the circuit board 4 when the switch block 6 is attached to the circuit board 4, the connectors 6b and 4b can be easily connected to each other. Occurrence of poor connection between the connectors 6b and 4b can be prevented.
[0017]
Incidentally, as shown in FIG. 1, a metal cord cover 17 that accommodates the extra length portion of the power cord 10 therein and is supported by the power cord 10 is detachably attached to the upper surface of the instrument body 1. The cord cover 17 is formed in a substantially truncated cone shape whose bottom surface (lower surface) is opened, and a round hole 17a for introducing the power cord 10 is provided on the top surface (upper surface). As shown in FIG. 7, one end of the power cord 10 is connected to the hooking sealing cap 18, the other end is connected to the power connector 10a as described above, and further between the hooking sealing cap 18 and the power connector 10a. A cord adjuster 19 is extrapolated. The cord adjuster 19 is well known in the art and can be fixed at an arbitrary position of the power cord 10. Therefore, the distance from the hooking sealing cap 18 to the instrument body 1 can be adjusted by fitting and fixing the cord adjuster 19 in the round hole 17a of the cord cover 17 and changing the fixing position of the cord adjuster 19 with respect to the power cord 10. The surplus length portion of the power cord 10 that has been left over by adjustment is stored in the cord cover 17.
[0018]
Next, an attachment structure for detachably attaching the cord cover 17 to the upper surface of the instrument body 1 will be described.
[0019]
As shown in FIG. 1, a plurality of (three in this embodiment) fitting pieces 17 b projecting outward are provided at substantially equal intervals on the lower end edge of the cord cover 17. On the other hand, a plurality (three in the present embodiment) of fitting portions 1 f are provided on the upper surface of the instrument body 1 so that the fitting pieces 17 b of the cord cover 17 are fitted. These fitting portions 1f are formed by cutting and raising the bottom surface of the instrument body 1 and bending it so that the cross-sectional shape is substantially bowl-shaped and the whole is substantially arc-shaped, with one end opened and the other end closed. That is, by rotating the cord cover 17 in a plane substantially parallel to the upper surface of the instrument body 1, the fitting piece 17b of the cord cover 17 is inserted from the open end of the fitting portion 1f of the instrument body 1, 3, the fitting piece 17 b and the fitting portion 1 f are fitted, and the cord cover 17 is fixed to the instrument body 1. Moreover, if the code cover 17 fixed to the instrument body 1 is rotated in the opposite direction, the fitting piece 17b of the cord cover 17 is withdrawn from the open end portion to the outside of the fitting portion 1f and fitted with the fitting piece 17b. The fitting portion 1f is disengaged, and the cord cover 17 can be removed from the instrument body 1.
[0020]
Here, when the cord cover 17 rotates carelessly and the fitting piece 17b and the fitting portion 1f are disengaged, the power connector 10a connected to the lower end of the power cord 10 and the power connector of the switch block 6 The load of the instrument including the instrument body 1 and the fluorescent lamps 3A and 3B is applied to 6a, and in the worst case, the power connectors 10a and 6a may be detached and the instrument may fall. Therefore, in this embodiment, the fitting which protrudes out of the instrument main body 1 through the window hole 1g provided in the upper surface of the instrument main body 1 so as to be able to advance and retreat, and is fitted into the fitting portion 1f in a state of protruding out of the instrument main body 1. The insulating member 5 is provided with a restricting portion 5g that restricts the movement of the piece 17b in the anti-fitting direction.
[0021]
As shown in FIGS. 5 and 6, the restriction portion 5 g is generally rectangular in shape, and is cantilevered by the insulating member 5 on one end side so as to be vertically moved (the direction penetrating the bottom plate 5 a of the insulating member 5). It protrudes upwards from the front-end | tip part of the bending piece 5h formed freely. In addition, a plurality of protrusions 5i are arranged in a row on the upper surface of the restricting portion 5g as anti-slip during operation, and an inclined surface 5j that is inclined downward toward the outside is formed from the upper surface to the side surface of the restricting portion 5g. (See FIG. 5 (b)). Further, a rib 5k is provided on the back surface (lower surface) of the regulating portion 5g so as to project downward from the circuit board 4 so as to regulate the amount of bending of the bending piece 5h. Therefore, when the insulating member 5 is attached to the instrument body 1, the restricting portion 5g protrudes from the window hole 1g provided on the upper surface of the instrument body 1, and when the protrusion 5i is pressed with a finger, the bending piece 5h is bent and the restricting portion is formed. 5g enters the instrument body 1 through the window hole 1g, and when the finger is released, the bending piece 5h returns to the original state, and the restricting portion 5g protrudes out of the instrument body 1 from the window hole 1g.
[0022]
Thus, when the cord cover 17 is rotated in a plane substantially parallel to the upper surface of the instrument body 1, the fitting piece 17b of the cord cover 17 projects from the window hole 1g as shown in FIG. Since a downward force acts on the restricting portion 5g in sliding contact with the inclined surface 5j, the bending piece 5h is bent downward by this force, and the restricting portion 5g enters the instrument body 1 through the window hole 1g. 5 g is inserted from the open end of the fitting portion 1 f of the instrument body 1, the fitting piece 17 b and the fitting portion 1 f are fitted, and the cord cover 17 is fixed to the instrument body 1. In the state where the fitting piece 17b is fitted to the fitting portion 1f, the downward force by the fitting piece 17b does not act, so that the bending piece 5h returns to the original state as shown in FIG. 5g protrudes out of the instrument body 1 from the window hole 1g, and the fitting portion 17g protrudes from the open end of the fitting portion 1f so that the restricting portion 5g contacts the fitting portion 1f. The movement of the piece 17b in the anti-fitting direction is restricted. Thus, by restricting the fitting piece 17b of the cord cover 17 fitted to the fitting portion 1f of the instrument body 1 from moving in the anti-fitting direction by the restriction portion 5g provided on the insulating member 5, the fitting is achieved. It is possible to prevent the cord cover 17 from being detached from the instrument body 1 due to the fitting state between the portion 1f and the fitting piece 17b being released. Further, if the protruding portion 5i is pushed with a finger to allow the restricting portion 5g to enter the instrument body 1 through the window hole 1g, the restriction by the restricting portion 5g is released and the cord cover 17 is rotated in the opposite direction to fit. The mating portion 1f and the fitting piece 17b are unfitted, and the cord cover 17 can be removed from the instrument body 1. Here, since the rib 5k is provided on the lower surface of the restricting portion 5g, when the downward force acts on the restricting portion 5g and the bending piece 5h is bent, the tip of the rib 5k comes into contact with the circuit board 4 and is bent. The amount of bending of the piece 5h is restricted, and the bending piece 5h can be prevented from being plastically deformed.
[0023]
Note that a shade 20 is attached to the instrument body 1 as shown in FIG. The shade 20 is formed in a bowl shape having an upper surface and a lower surface opened, and is attached to the instrument body 1 by placing the peripheral edge of the upper surface opening on the outer casing 1 a of the instrument body 1.
[0024]
【The invention's effect】
The invention of claim 1 is a hanging type lighting fixture suspended from a ceiling by a power cord, a socket to which a lamp is detachably mounted, a circuit board on which a lighting circuit for lighting the lamp is mounted, A metal fixture body in which the socket is mounted and the lighting circuit is housed, a synthetic resin insulating member interposed between the fixture body and the circuit board to insulate the lighting circuit from the fixture body, and the fixture body The power cord is provided on the top surface of the power cord and accommodates the extra length of the power cord inside and is supported by the power cord, and is insulated from the socket on the opposite side of the socket across the position suspended by the power cord. The member is arranged, and the insulating member is arranged at a position opposite to the socket across the position where it is suspended by the power cord in the instrument body. It may keep the instrument body horizontally taking the weight balance of the instrument body between. In other words, the weight balance is adjusted with an insulating member made of synthetic resin that is interposed between the fixture body and the circuit board and insulates the lighting circuit from the fixture body, eliminating the need for conventional weights and reducing the number of parts. You can go down.
[0025]
The invention of claim 2 is characterized in that, in the invention of claim 1, a storage portion capable of appropriately storing a metal weight is provided in the insulating member, and if necessary, the weight is balanced using the weight as in the conventional case. In addition, even when a weight is used, it is only necessary to store the weight in the storage portion provided in the insulating member, so that the adjustment can be easily performed.
[0026]
The invention of claim 3 is the invention of claim 1 or 2, wherein the cord cover is fitted by providing a fitting piece at the lower end edge of the cord cover and rotating the cord cover in a plane substantially parallel to the upper surface of the instrument body. A fitting part that fits the piece protrudes from the upper surface of the instrument body, and protrudes out of the instrument body through a window hole provided on the upper surface of the instrument body, and fits into the fitting part in a state of projecting out of the instrument body. A cord cover fitted to the fitting portion of the instrument body by the regulating portion provided on the insulating member, wherein the regulating member is provided on the insulating member to restrict the mating fitting piece from moving in the anti-fitting direction. By restricting the fitting piece from moving in the anti-fitting direction, it is possible to prevent the fitting state between the fitting portion and the fitting piece from coming off and the cord cover from falling off from the instrument body.
[0027]
According to a fourth aspect of the present invention, in the first, second or third aspect of the present invention, a switch block including a switch for turning on / off the lighting circuit and a power connector to which the power cord is connected is mounted on the lower surface of the circuit board. A connector and a connector provided on the upper surface of the switch block are connected to connect the switch and the power cord to the lighting circuit, and a projection that supports the circuit board by contacting the connector on the upper surface of the circuit board or in the vicinity thereof. Since it is provided on the insulating member and the protrusion provided on the insulating member supports the position facing the connector on the upper surface of the circuit board or the vicinity thereof, the circuit board is bent when the switch block is attached to the circuit board. Therefore, both connectors can be easily connected to each other, and connection failure of the connectors can be prevented.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view with a part omitted, showing an embodiment.
FIG. 2 is a cross-sectional view of the above.
FIG. 3 is a top view of the above with the cord cover removed.
FIG. 4 is a bottom view with a part omitted.
5A and 5B show the insulating member of the above, wherein FIG. 5A is a top view, FIG. 5B is a side view, and FIG. 5C is a bottom view.
6A and 6B show a main part of the insulating member in the above, wherein FIG. 6A is a sectional view taken along the line AA in FIG. 5 and FIG. 6B is a sectional view taken along the line aa in FIG.
FIG. 7 is a plan view of the power cord in the same as above.
FIG. 8 is an explanatory diagram of an attaching operation for attaching the cord cover to the instrument body.
FIG. 9 is an explanatory diagram of an attaching operation for attaching the cord cover to the instrument main body.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Instrument body 4 Circuit board 5 Insulation member 6 Switch block 7 Electric wire 8 Socket 10 Power cord 17 Cord cover

Claims

A hanging-type lighting fixture suspended from a ceiling by a power cord, a socket in which a lamp is detachably mounted, a circuit board on which a lighting circuit for lighting the lamp is mounted, and a socket that is mounted inside A metal fixture body that houses the lighting circuit, a synthetic resin insulating member interposed between the fixture body and the circuit board to insulate the lighting circuit from the fixture body, and a power cord provided on the top surface of the fixture body And a cord cover that is supported by the power cord, and an insulating member is disposed at a position opposite to the socket across the position of the instrument body that is suspended by the power cord. A hanging light fixture.

2. The pendant lighting device according to claim 1, wherein the insulating member is provided with a storage portion capable of appropriately storing a metal weight.

A fitting piece is provided at the lower end edge of the cord cover, and a fitting portion for fitting the fitting piece of the cord cover is projected from the upper surface of the instrument body by rotating the code cover in a plane substantially parallel to the upper surface of the instrument body. The fitting piece that protrudes out of the instrument body through the window hole provided on the upper surface of the instrument body and can be moved forward and backward is restricted from moving in the anti-fitting direction. The hanging type lighting apparatus according to claim 1, wherein a regulating portion is provided on the insulating member.

A switch block having a switch for turning on / off a lighting circuit and a power connector to which a power cord is connected is connected. 4. The insulating member is provided with a protrusion that is connected to the lighting circuit and is in contact with a position on the upper surface of the circuit board facing the connector or in the vicinity thereof to support the circuit board. Hanging lighting fixtures.