JP4021271B2

JP4021271B2 - lighting equipment

Info

Publication number: JP4021271B2
Application number: JP2002220659A
Authority: JP
Inventors: 賢治松田; 一岡　　建; 久永大西
Original assignee: Matsushita Electric Works Ltd
Current assignee: Panasonic Electric Works Co Ltd
Priority date: 2002-07-30
Filing date: 2002-07-30
Publication date: 2007-12-12
Anticipated expiration: 2022-07-30
Also published as: JP2004063291A

Description

【０００１】
【発明の属する技術分野】
この発明は、照明器具に関するものである。
【０００２】
【従来の技術】
天井直付け型であって、放電灯を高周波点灯させている照明器具においては、従来より、下面方向への光束の高効率化等の目的で放電灯の上側には金属製の反射板を有するものが存在する。こうした天井直付け型の照明器具においては、配光は下面方向のみに限定される。上面方向へも光束を得るためには、金属製の反射板を除去し、光透過性のカバーに変更する必要がある。すなわち、上下にそれぞれ独立した光透過性の樹脂カバーを有し、上下両方向に光束を与える照明器具があった。
【０００３】
【発明が解決しようとする課題】
しかしながら、上記のような構造を有する放電灯照明器具においては、放電灯の直近に金属製の反射板がないため、雑音性能および始動性の悪化につながる恐れがある。
【０００４】
したがって、この発明の目的は、上記の点に鑑みてなされたものであり、上面への光束を遮ることなく雑音性能および始動性の悪化を抑制することができる照明器具を提供することである。
【０００５】
【課題を解決するための手段】
上記課題を解決するためにこの発明の請求項１記載の照明器具は、環形の放電灯と、この放電灯の内径に収まる高周波点灯装置と、放電灯の上側および下側にそれぞれ配置された光透過性の樹脂カバーとを備え、前記放電灯の上側および下側の両方から光束が得られる天井面直付け型の照明器具において、前記放電灯と上側の前記樹脂カバーとの間に、前記放電灯の環形に沿う形で、上面方向への光束を完全に遮ることのない環形の金属板を配置し、前記金属板を前記高周波点灯装置の外郭の金属部と電気的に接続した。
【０００６】
このように、放電灯と上側の樹脂カバーとの間に、放電灯の環形に沿う形で、上面方向への光束を完全に遮ることのない環形の金属板を配置し、金属板を高周波点灯装置の外郭の金属部と電気的に接続したので、上面方向への光束を得ながらにして、懸念される雑音性能と始動性能の悪化を抑制することができる。
【０００７】
請求項２記載の照明器具は、請求項１記載の照明器具において、環形の金属板の内径が環形の放電灯の内径以上で、かつ、前記金属板の外径が前記放電灯の外径以下であり、鉛直下方から見たとき、前記金属板が高周波点灯装置との接合部を除いては放電灯により完全に隠れ、鉛直上方から見たとき、前記放電灯が前記金属板により完全に隠れていない。
【０００８】
このように、環形の金属板の内径が環形の放電灯の内径以上で、かつ、金属板の外径が放電灯の外径以下であり、鉛直下方から見たとき、金属板が高周波点灯装置との接合部を除いては放電灯により完全に隠れ、鉛直上方から見たとき、放電灯が金属板により完全に隠れていないので、上面方向へ光束を遮蔽してしまうことを回避し、金属板により雑音性能および始動性を向上させることができる。また、照明器具を下方から見た場合、金属板が見えないので外観が良好である。
【０００９】
請求項３記載の照明器具は、請求項１記載の照明器具において、放電灯が２重環形放電灯であり、この２重環形放電灯の内環側の放電管の外径と、外環側の放電管の内径との間の隙間を塞ぐように金属板を配置した。
【００１０】
このように、放電灯が２重環形放電灯であり、この２重環形放電灯の内環側の放電管の外径と、外環側の放電管の内径との間の隙間を塞ぐように金属板を配置したので、下面方向への光束を強化し、かつ、雑音性能および始動性を向上させることができる。
【００１１】
請求項４記載の照明器具は、請求項１記載の照明器具において、環形の金属板の外径が、環形の放電灯の放電管断面の中心が描く円の直径よりも小さく、かつ、内側に配置された。
【００１２】
このように、環形の金属板の外径が、環形の放電灯の放電管断面の中心が描く円の直径よりも小さく、かつ、内側に配置されたので、さらに放電灯からの光束を遮り難く、かつ、雑音性能および始動性を向上させることができる。
【００１３】
請求項５記載の照明器具は、請求項１，２，３または４記載の照明器具において、放電灯を接続するソケット部とは別に、前記放電灯に直接接触する金属製の放電灯支持具を有し、この放電灯支持具と金属板が直接、電気的に接続されている。このように、放電灯を接続するソケット部とは別に、放電灯に直接接触する金属製の放電灯支持具を有し、この放電灯支持具と金属板が直接、電気的に接続されているので、金属板とともに放電灯支持具により雑音性能および始動性を向上させる作用効果を得る。
【００１４】
請求項６記載の照明器具は、請求項５記載の照明器具において、放電灯支持具と金属板との接続点が、前記金属板と高周波点灯装置の外郭の金属部との接続点と共通した位置にある。このように、放電灯支持具と金属板との接続点が、金属板と高周波点灯装置の外郭の金属部との接続点と共通した位置にあるので、放電灯支持具から高周波点灯装置の外郭の金属部までの距離が最短になり、雑音性能および始動性の向上に寄与する。
【００１５】
請求項７記載の照明器具は、請求項１，２，３，４，５または６記載の照明器具において、放電灯の断面の中心と、金属板の幅の中心とを結ぶ線が、前記金属板に対して直交している。このように、放電灯の放電管断面の中心と、金属板の幅の中心とを結ぶ線が、金属板に対して直交しているので、金属板を放電灯の放電管に対向させることができ、さらに雑音性能および始動性の向上を図ることができる。
【００１６】
【発明の実施の形態】
この発明の第１の実施の形態の照明器具を図１ないし図３に基づいて説明する。図１はこの発明の第１の実施の形態の照明器具の断面図、図２は図１のＡ部拡大図、図３は図１の照明器具の放電灯を鉛直下方から見た平面図である。
【００１７】
図１に示すように、この照明器具は天井面直付け型であり、環形の放電灯（蛍光灯）１と、この放電灯１の内径に収まる高周波点灯装置２と、放電灯１の上側および下側にそれぞれ配置された光透過性の樹脂カバー３，４とを備え、放電灯１の上側および下側の両方から光束が得られる。高周波点灯装置２は、天井面５に設けた引っ掛けシーリング、ローゼット等の配線器具６に接続固定される。樹脂カバー３，４は高周波点灯装置２の上側および下側を覆うアクリルカバー等からなる。上側樹脂カバー３は、中央に設けた穴に電源部６を挿通した状態で高周波点灯装置２にて支持される。下側樹脂カバー４は図示しないが上側樹脂カバー３に取り付けられる。
【００１８】
放電灯１と上側の樹脂カバー３との間には、放電灯１の環形に沿う形で、上面方向への光束を完全に遮ることのない環形の金属板７を配置し、金属板７を高周波点灯装置２の外郭の金属部と電気的に接続している。この場合、図３に示すように、高周波点灯装置２の側面の所定位置より突設した複数のアーム８により金属板７を固定している。
【００１９】
図２に示すように、金属板７は、その幅が放電灯１の内径と外径との間に収まっている。すなわち、金属板７の内径が放電灯１の内径以上で、かつ、金属板７の外径が放電灯１の外径以下であり、鉛直下方から見たとき、金属板７が高周波点灯装置２との接合部であるアーム８を除いては放電灯１により完全に隠れ、鉛直上方から見たとき、放電灯１が金属板７により完全に隠れていない構成である。図２中のａは放電灯の管径、ｂは金属板の幅であり、ａ＞ｂの関係が成り立っている。
【００２０】
また、放電灯１を接続するソケット部１０とは別に、放電灯１に直接接触する金属製の放電灯支持具９を有し、この放電灯支持具９と金属板７が直接、電気的に接続されている。この場合、放電灯支持具９は金属板７とアーム８と接合しており、放電灯支持具９と金属板７との接続点が、金属板７と高周波点灯装置２の外郭の金属部との接続点と共通した位置にある。また、放電灯１の放電管断面の中心と、金属板７の幅の中心とを結ぶ線が、金属板７に対して直交している。ソケット部１０は、高周波点灯装置２の側面に設けられ、放電灯１のランプ口金２０の端子ピンが差し込まれて接続される（図示せず）。
【００２１】
以上のようにこの実施の形態によれば、放電灯１の上側に配置する金属板７を、放電灯１よりも幅の狭いものにすることで上面方向への光束を遮蔽してしまうことを回避し、また、金属板７と、放電灯支持具９により雑音性能および始動性を向上させる効果を得ることができる。
【００２２】
この発明の第２の実施の形態の照明器具を図４ないし図６に基づいて説明する。図４はこの発明の第２の実施の形態の照明器具の断面図、図５は図４のＡ部拡大図、図６は図４の照明器具の放電灯を鉛直下方から見た平面図である。
【００２３】
図４に示すようにこの実施の形態では、放電灯が２重環形放電灯である。すなわち、２重環形の放電灯（蛍光灯）１１と、この２重環形放電灯１１の内径に収まる高周波点灯装置２と、２重環形放電灯１１の上側および下側にそれぞれ配置された光透過性の樹脂カバー３，４とを備え、２重環形放電灯１１の上側および下側の両方から光束が得られる。２重環形放電灯１１と上側の樹脂カバー３との間には、２重環形放電灯１１の環形に沿う形で、上面方向への光束を完全に遮ることのない環形の金属板１２を配置し、金属板１２を高周波点灯装置２の外郭の金属部と電気的に接続している。
【００２４】
この場合、第１の実施の形態と同様に、金属板１２は高周波点灯装置２の側面の所定位置より突設した複数のアーム８により固定している。また、図５に示すように、金属板１２は、その幅が２重環形放電灯１１の内径と外径との間に収まっている。この際、２重環形放電灯１１の内環側の放電管１１ａの外径と、外環側の放電管１１ｂの内径との間の隙間を塞ぐように金属板１２を配置している。図５中のａは放電灯の管径、ｂは金属板の幅、ｃは内環と外環の間隔であり、ａ＞ｂ＞ｃの関係が成り立っている。
【００２５】
また、２重環形放電灯１１を接続するソケット部１０とは別に、２重環形放電灯１１に直接接触する金属製の放電灯支持具１３を有し、この放電灯支持具１３と金属板１２が直接、電気的に接続されている。この場合、放電灯支持具１３は金属板１２とアーム８の接続箇所に取り付けられている。また、２重環形放電灯１１の放電管断面の中心（２本の放電管１１ａ，１１ｂ間の隙間１１ｃに位置する）と、金属板１２の幅の中心とを結ぶ線が、金属板１２に対して直交している。
【００２６】
以上のようにこの実施の形態によれば、２重環形放電灯１１により上下両方向への光束を得、２重環形放電灯１１の内側の放電管１１ａと外側の放電管１１ｂとの間の隙間１１ｃを塞ぐように環形の金属板１２を配置することで、下面方向への光束を強化し、かつ、雑音性能および始動性を向上させている。その他の構成は、第１の実施の形態と同様であり、同一部材には同一符号を付して説明を省略する。
【００２７】
この発明の第３の実施の形態の照明器具を図７ないし図９に基づいて説明する。図７はこの発明の第３の実施の形態の照明器具の断面図、図８は図７のＡ部拡大図、図９は図７の照明器具の放電灯を鉛直下方から見た平面図である。
【００２８】
図７に示すように、この照明器具は第１の実施の形態と同様に、環形の放電灯（蛍光灯）１４と、この放電灯１４の内径に収まる高周波点灯装置２と、放電灯１４の上側および下側にそれぞれ配置された光透過性の樹脂カバー３，４とを備え、放電灯１４の上側および下側の両方から光束が得られる。放電灯１４と上側の樹脂カバー３との間には、放電灯１４の環形に沿う形で、上面方向への光束を完全に遮ることのない環形の金属板１５を配置し、金属板１５を高周波点灯装置２の外郭の金属部と電気的に接続している。
【００２９】
この場合、金属板１５は高周波点灯装置２の側面の所定位置より突設した複数のアーム８により固定しているが、その構成が異なる。すなわち、図８に示すように、金属板１５は放電灯１４の内径に略収まる大きさであり、内径側が下方へ傾斜した円錐面で形成されている。この際、環形の金属板１５の外径が、環形の放電灯１４の放電管断面の中心が描く円の直径よりも小さく、かつ、内側に配置されている。図８中のｄは金属板の外径、ｅは環形放電灯の放電管の中心、ｆは環形放電灯の内径であり、ｄ＜ｅの関係が成り立っている（ｄよりｅの方が外側にある）。また、ｄ＞ｆとすることで、金属板１５と放電灯１４の距離を接近できるが、ｄ≦ｆとしてもよい。
【００３０】
また、放電灯１４を接続するソケット部１０とは別に、放電灯１４に直接接触する金属製の放電灯支持具１６を有し、この放電灯支持具１６と金属板１４が直接、電気的に接続されている。この場合、放電灯支持具１６は、アーム８とは異なる位置で金属板１５に取り付けられている。また、放電灯１４の放電管断面の中心ｇと、金属板１５の幅の中心ｈとを結ぶ線が、金属板１５に対して直交している。
【００３１】
以上のようにこの実施の形態によれば、放電灯１４に沿って配置された金属板１５を放電灯１４の内側に配置することで、さらに放電灯１４からの光束を遮り難くしており、金属板１５を放電灯１４の放電管に対向させることでさらに雑音性能および始動性の向上を図っている。その他の構成は、第１の実施の形態と同様であり、同一部材には同一符号を付して説明を省略する。
【００３２】
なお、第１および第２の実施の形態において、第３の実施の形態のように放電灯支持具をアームとは異なる位置で金属板に取り付けてもよい。また、アームおよび放電灯支持具はそれぞれ２つ設けたが、３つ以上設けてもよい。
【００３３】
【発明の効果】
この発明の請求項１記載の照明器具によれば、放電灯と上側の樹脂カバーとの間に、放電灯の環形に沿う形で、上面方向への光束を完全に遮ることのない環形の金属板を配置し、金属板を高周波点灯装置の外郭の金属部と電気的に接続したので、上面方向への光束を得ながらにして、懸念される雑音性能と始動性能の悪化を抑制することができる。
【００３４】
請求項２では、環形の金属板の内径が環形の放電灯の内径以上で、かつ、金属板の外径が放電灯の外径以下であり、鉛直下方から見たとき、金属板が高周波点灯装置との接合部を除いては放電灯により完全に隠れ、鉛直上方から見たとき、放電灯が金属板により完全に隠れていないので、上面方向へ光束を遮蔽してしまうことを回避し、金属板により雑音性能および始動性を向上させることができる。また、照明器具を下方から見た場合、金属板が見えないので外観が良好である。
【００３５】
請求項３では、放電灯が２重環形放電灯であり、この２重環形放電灯の内環側の放電管の外径と、外環側の放電管の内径との間の隙間を塞ぐように金属板を配置したので、下面方向への光束を強化し、かつ、雑音性能および始動性を向上させることができる。
【００３６】
請求項４では、環形の金属板の外径が、環形の放電灯の放電管断面の中心が描く円の直径よりも小さく、かつ、内側に配置されたので、さらに放電灯からの光束を遮り難く、かつ、雑音性能および始動性を向上させることができる。
【００３７】
請求項５では、放電灯を接続するソケット部とは別に、放電灯に直接接触する金属製の放電灯支持具を有し、この放電灯支持具と金属板が直接、電気的に接続されているので、金属板とともに放電灯支持具により雑音性能および始動性を向上させる作用効果を得る。
【００３８】
請求項６では、放電灯支持具と金属板との接続点が、金属板と高周波点灯装置の外郭の金属部との接続点と共通した位置にあるので、放電灯支持具から高周波点灯装置の外郭の金属部までの距離が最短になり、雑音性能および始動性の向上に寄与する。
【００３９】
請求項７では、放電灯の放電管断面の中心と、金属板の幅の中心とを結ぶ線が、金属板に対して直交しているので、金属板を放電灯の放電管に対向させることができ、さらに雑音性能および始動性の向上を図ることができる。
【図面の簡単な説明】
【図１】この発明の第１の実施の形態の照明器具の断面図である。
【図２】図１のＡ部拡大図である。
【図３】図１の照明器具の放電灯を鉛直下方から見た平面図である。
【図４】この発明の第２の実施の形態の照明器具の断面図である。
【図５】図４のＡ部拡大図である。
【図６】図４の照明器具の放電灯を鉛直下方から見た平面図である。
【図７】この発明の第３の実施の形態の照明器具の断面図である。
【図８】図７のＡ部拡大図である。
【図９】図７の照明器具の放電灯を鉛直下方から見た平面図である。
【符号の説明】
１，１４放電灯
２高周波点灯装置
３上側樹脂カバー
４下側樹脂カバー
５天井面
７，１２，１５金属板
９，１３，１６放電灯支持具
１１２重環形放電灯
１１ａ，１１ｂ放電管
１１ｃ隙間[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lighting fixture.
[0002]
[Prior art]
In a lighting fixture that is directly mounted on the ceiling and has a discharge lamp operated at a high frequency, conventionally, a metal reflector is provided on the upper side of the discharge lamp for the purpose of improving the efficiency of the light flux toward the lower surface. Things exist. In such a ceiling-mounted lighting fixture, the light distribution is limited only to the bottom surface direction. In order to obtain a light beam also in the upper surface direction, it is necessary to remove the metal reflector and change it to a light-transmitting cover. That is, there has been a lighting fixture that has independent light-transmitting resin covers on the upper and lower sides and gives light beams in both the upper and lower directions.
[0003]
[Problems to be solved by the invention]
However, in the discharge lamp lighting fixture having the above-described structure, there is no metal reflector near the discharge lamp, which may lead to deterioration of noise performance and startability.
[0004]
Accordingly, an object of the present invention has been made in view of the above points, and it is an object of the present invention to provide a luminaire that can suppress deterioration in noise performance and startability without blocking the light flux to the upper surface.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, a lighting fixture according to claim 1 of the present invention includes a ring-shaped discharge lamp, a high-frequency lighting device that fits within the inner diameter of the discharge lamp, and light disposed on the upper side and the lower side of the discharge lamp. A ceiling-surface-mounted luminaire that includes a transparent resin cover and is capable of obtaining a light beam from both the upper side and the lower side of the discharge lamp, and the discharge lamp is disposed between the discharge lamp and the upper resin cover. A ring-shaped metal plate that does not completely block the light flux toward the upper surface in a shape that follows the ring shape of the electric lamp is disposed, and the metal plate is electrically connected to the metal portion of the outline of the high-frequency lighting device.
[0006]
In this way, between the discharge lamp and the upper resin cover, an annular metal plate that does not completely block the light flux in the upper surface direction is arranged along the ring shape of the discharge lamp, and the metal plate is lit at high frequency. Since it is electrically connected to the metal part of the outer shell of the apparatus, it is possible to suppress the deterioration of the noise performance and the start-up performance that are of concern while obtaining the light flux in the upper surface direction.
[0007]
The lighting fixture according to claim 2 is the lighting fixture according to claim 1, wherein the inner diameter of the annular metal plate is equal to or larger than the inner diameter of the annular discharge lamp, and the outer diameter of the metal plate is equal to or smaller than the outer diameter of the discharge lamp. When viewed from below vertically, the metal plate is completely hidden by the discharge lamp except for the joint with the high frequency lighting device, and when viewed from above vertically, the discharge lamp is completely hidden by the metal plate. Not.
[0008]
Thus, the inner diameter of the ring-shaped metal plate is equal to or larger than the inner diameter of the ring-shaped discharge lamp, and the outer diameter of the metal plate is equal to or smaller than the outer diameter of the discharge lamp. Except for the junction with the discharge lamp, it is completely hidden by the discharge lamp, and when viewed from above, the discharge lamp is not completely hidden by the metal plate. The noise performance and startability can be improved by the plate. Moreover, when the luminaire is viewed from below, the appearance is good because the metal plate cannot be seen.
[0009]
The lighting fixture according to claim 3 is the lighting fixture according to claim 1, wherein the discharge lamp is a double ring discharge lamp, the outer diameter of the discharge tube on the inner ring side of the double ring discharge lamp, and the outer ring side A metal plate was arranged so as to close a gap between the inner diameter of the discharge tube.
[0010]
Thus, the discharge lamp is a double ring discharge lamp, and the gap between the outer diameter of the discharge tube on the inner ring side of the double ring discharge lamp and the inner diameter of the discharge tube on the outer ring side is closed. Since the metal plate is disposed, it is possible to enhance the light flux toward the lower surface and improve the noise performance and startability.
[0011]
The lighting fixture according to claim 4 is the lighting fixture according to claim 1, wherein the outer diameter of the ring-shaped metal plate is smaller than the diameter of the circle drawn by the center of the discharge tube cross section of the ring-shaped discharge lamp, and on the inner side. Arranged.
[0012]
In this way, the outer diameter of the annular metal plate is smaller than the diameter of the circle drawn by the center of the discharge tube cross section of the annular discharge lamp, and is arranged on the inner side, so that it is difficult to block the light flux from the discharge lamp. And noise performance and startability can be improved.
[0013]
The lighting fixture according to claim 5 is the lighting fixture according to claim 1, 2, 3 or 4, wherein a metal discharge lamp support that is in direct contact with the discharge lamp is provided separately from the socket portion that connects the discharge lamp. The discharge lamp support and the metal plate are directly electrically connected. Thus, apart from the socket part for connecting the discharge lamp, it has a metal discharge lamp support that is in direct contact with the discharge lamp, and the discharge lamp support and the metal plate are directly electrically connected. Therefore, the effect of improving noise performance and startability is obtained by the discharge lamp support together with the metal plate.
[0014]
The lighting fixture according to claim 6 is the lighting fixture according to claim 5, wherein the connection point between the discharge lamp support and the metal plate is the same as the connection point between the metal plate and the metal portion of the outline of the high-frequency lighting device. In position. In this way, the connection point between the discharge lamp support and the metal plate is at the same position as the connection point between the metal plate and the metal part of the outline of the high-frequency lighting device. As a result, the distance to the metal part becomes the shortest, which contributes to improvement in noise performance and startability.
[0015]
The lighting fixture according to claim 7 is the lighting fixture according to claim 1, 2, 3, 4, 5 or 6, wherein a line connecting the center of the cross section of the discharge lamp and the center of the width of the metal plate is the metal. It is orthogonal to the plate. Thus, since the line connecting the center of the discharge tube cross section of the discharge lamp and the center of the width of the metal plate is orthogonal to the metal plate, the metal plate can be opposed to the discharge tube of the discharge lamp. In addition, noise performance and startability can be improved.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
The lighting fixture of 1st Embodiment of this invention is demonstrated based on FIG. 1 thru | or FIG. 1 is a cross-sectional view of a lighting fixture according to a first embodiment of the present invention, FIG. 2 is an enlarged view of a portion A in FIG. 1, and FIG. 3 is a plan view of the discharge lamp of the lighting fixture in FIG. is there.
[0017]
As shown in FIG. 1, the lighting fixture is of a ceiling-mounted type, and includes a ring-shaped discharge lamp (fluorescent lamp) 1, a high-frequency lighting device 2 that fits inside the discharge lamp 1, an upper side of the discharge lamp 1, and Light transmissive resin covers 3 and 4 are provided on the lower side, respectively, and light flux is obtained from both the upper side and the lower side of the discharge lamp 1. The high frequency lighting device 2 is connected and fixed to a wiring fixture 6 such as a hook ceiling or a rosette provided on the ceiling surface 5. The resin covers 3 and 4 are made of an acrylic cover that covers the upper side and the lower side of the high-frequency lighting device 2. The upper resin cover 3 is supported by the high-frequency lighting device 2 in a state where the power supply unit 6 is inserted through a hole provided in the center. The lower resin cover 4 is attached to the upper resin cover 3 (not shown).
[0018]
Between the discharge lamp 1 and the upper resin cover 3, an annular metal plate 7 is disposed along the ring shape of the discharge lamp 1 so as not to completely block the light beam in the upper surface direction. The high frequency lighting device 2 is electrically connected to the outer metal part. In this case, as shown in FIG. 3, the metal plate 7 is fixed by a plurality of arms 8 protruding from a predetermined position on the side surface of the high-frequency lighting device 2.
[0019]
As shown in FIG. 2, the metal plate 7 has a width that falls between the inner diameter and the outer diameter of the discharge lamp 1. That is, the inner diameter of the metal plate 7 is equal to or larger than the inner diameter of the discharge lamp 1 and the outer diameter of the metal plate 7 is equal to or smaller than the outer diameter of the discharge lamp 1. The discharge lamp 1 is completely hidden by the discharge lamp 1 except for the arm 8 which is a junction with the metal plate 7 and is not completely hidden by the metal plate 7 when viewed from above. In FIG. 2, a is the tube diameter of the discharge lamp, b is the width of the metal plate, and a relationship of a> b is established.
[0020]
Further, apart from the socket portion 10 for connecting the discharge lamp 1, it has a metal discharge lamp support 9 that is in direct contact with the discharge lamp 1, and the discharge lamp support 9 and the metal plate 7 are directly and electrically connected. It is connected. In this case, the discharge lamp support 9 is joined to the metal plate 7 and the arm 8, and the connection point between the discharge lamp support 9 and the metal plate 7 is between the metal plate 7 and the outer metal part of the high-frequency lighting device 2. It is in the same position as the connection point. A line connecting the center of the discharge tube cross section of the discharge lamp 1 and the center of the width of the metal plate 7 is orthogonal to the metal plate 7. The socket part 10 is provided on the side surface of the high-frequency lighting device 2 and is connected by inserting a terminal pin of the lamp cap 20 of the discharge lamp 1 (not shown).
[0021]
As described above, according to this embodiment, the metal plate 7 disposed on the upper side of the discharge lamp 1 is made narrower than the discharge lamp 1 to shield the light flux in the upper surface direction. In addition, an effect of improving noise performance and startability can be obtained by the metal plate 7 and the discharge lamp support 9.
[0022]
The lighting fixture of 2nd Embodiment of this invention is demonstrated based on FIG. 4 thru | or FIG. 4 is a cross-sectional view of a lighting fixture according to a second embodiment of the present invention, FIG. 5 is an enlarged view of a portion A of FIG. 4, and FIG. 6 is a plan view of the discharge lamp of the lighting fixture of FIG. is there.
[0023]
As shown in FIG. 4, in this embodiment, the discharge lamp is a double ring discharge lamp. That is, the double ring discharge lamp (fluorescent lamp) 11, the high-frequency lighting device 2 that fits within the inner diameter of the double ring discharge lamp 11, and the light transmission disposed above and below the double ring discharge lamp 11, respectively. The resin covers 3 and 4 are provided, and light flux is obtained from both the upper side and the lower side of the double ring discharge lamp 11. An annular metal plate 12 is disposed between the double ring discharge lamp 11 and the upper resin cover 3 so as to follow the ring shape of the double ring discharge lamp 11 and does not completely block the light beam in the upper surface direction. The metal plate 12 is electrically connected to the outer metal portion of the high-frequency lighting device 2.
[0024]
In this case, similarly to the first embodiment, the metal plate 12 is fixed by a plurality of arms 8 protruding from a predetermined position on the side surface of the high-frequency lighting device 2. Further, as shown in FIG. 5, the metal plate 12 has a width that falls between the inner diameter and the outer diameter of the double ring discharge lamp 11. At this time, the metal plate 12 is disposed so as to close a gap between the outer diameter of the discharge tube 11a on the inner ring side of the double ring discharge lamp 11 and the inner diameter of the discharge tube 11b on the outer ring side. In FIG. 5, a is the tube diameter of the discharge lamp, b is the width of the metal plate, c is the distance between the inner ring and the outer ring, and a relationship of a>b> c is established.
[0025]
In addition to the socket portion 10 for connecting the double ring discharge lamp 11, a metal discharge lamp support 13 that directly contacts the double ring discharge lamp 11 is provided. The discharge lamp support 13 and the metal plate 12 are provided. Are directly connected electrically. In this case, the discharge lamp support 13 is attached to a connecting portion between the metal plate 12 and the arm 8. A line connecting the center of the discharge tube cross section of the double ring discharge lamp 11 (located in the gap 11 c between the two discharge tubes 11 a and 11 b) and the center of the width of the metal plate 12 is formed on the metal plate 12. They are orthogonal to each other.
[0026]
As described above, according to this embodiment, the double ring discharge lamp 11 obtains light beams in both the upper and lower directions, and the gap between the discharge tube 11a inside the double ring discharge lamp 11 and the discharge tube 11b outside. By disposing the ring-shaped metal plate 12 so as to block 11c, the luminous flux in the lower surface direction is enhanced, and the noise performance and startability are improved. Other configurations are the same as those of the first embodiment, and the same members are denoted by the same reference numerals and description thereof is omitted.
[0027]
A lighting apparatus according to a third embodiment of the present invention will be described with reference to FIGS. 7 is a cross-sectional view of a lighting fixture according to a third embodiment of the present invention, FIG. 8 is an enlarged view of part A of FIG. 7, and FIG. 9 is a plan view of the discharge lamp of the lighting fixture of FIG. is there.
[0028]
As shown in FIG. 7, the lighting fixture includes an annular discharge lamp (fluorescent lamp) 14, a high-frequency lighting device 2 that fits inside the discharge lamp 14, and a discharge lamp 14, as in the first embodiment. Light transmissive resin covers 3 and 4 are provided on the upper side and the lower side, respectively, and light flux is obtained from both the upper side and the lower side of the discharge lamp 14. Between the discharge lamp 14 and the upper resin cover 3, an annular metal plate 15 is arranged along the ring shape of the discharge lamp 14 so as not to completely block the light flux in the upper surface direction. The high frequency lighting device 2 is electrically connected to the outer metal part.
[0029]
In this case, the metal plate 15 is fixed by a plurality of arms 8 protruding from a predetermined position on the side surface of the high-frequency lighting device 2, but the configuration is different. That is, as shown in FIG. 8, the metal plate 15 has a size that fits within the inner diameter of the discharge lamp 14 and is formed of a conical surface whose inner diameter side is inclined downward. At this time, the outer diameter of the ring-shaped metal plate 15 is smaller than the diameter of a circle drawn by the center of the discharge tube cross section of the ring-shaped discharge lamp 14 and is disposed inside. In FIG. 8, d is the outer diameter of the metal plate, e is the center of the discharge tube of the annular discharge lamp, f is the inner diameter of the annular discharge lamp, and the relationship d <e is established (e is more outward than d). It is in). Further, by setting d> f, the distance between the metal plate 15 and the discharge lamp 14 can be approached, but d ≦ f may be satisfied.
[0030]
Further, apart from the socket portion 10 to which the discharge lamp 14 is connected, a metal discharge lamp support 16 that directly contacts the discharge lamp 14 is provided, and the discharge lamp support 16 and the metal plate 14 are directly and electrically connected. It is connected. In this case, the discharge lamp support 16 is attached to the metal plate 15 at a position different from the arm 8. A line connecting the center g of the discharge tube cross section of the discharge lamp 14 and the center h of the width of the metal plate 15 is orthogonal to the metal plate 15.
[0031]
As described above, according to this embodiment, by arranging the metal plate 15 arranged along the discharge lamp 14 inside the discharge lamp 14, it is further difficult to block the light flux from the discharge lamp 14. By making the metal plate 15 face the discharge tube of the discharge lamp 14, noise performance and startability are further improved. Other configurations are the same as those of the first embodiment, and the same members are denoted by the same reference numerals and description thereof is omitted.
[0032]
In the first and second embodiments, the discharge lamp support may be attached to the metal plate at a position different from the arm as in the third embodiment. Further, although two arms and two discharge lamp supports are provided, three or more may be provided.
[0033]
【The invention's effect】
According to the lighting apparatus of the first aspect of the present invention, the ring-shaped metal between the discharge lamp and the upper resin cover is formed along the ring shape of the discharge lamp and does not completely block the light beam in the upper surface direction. Since the plate is placed and the metal plate is electrically connected to the outer metal part of the high-frequency lighting device, it is possible to obtain the luminous flux in the upper surface direction and suppress the deterioration of the noise performance and start-up performance that are of concern. it can.
[0034]
According to claim 2, the inner diameter of the annular metal plate is equal to or larger than the inner diameter of the annular discharge lamp, and the outer diameter of the metal plate is equal to or smaller than the outer diameter of the discharge lamp. Except for the junction with the device, it is completely hidden by the discharge lamp, and when viewed from above vertically, the discharge lamp is not completely hidden by the metal plate, so avoiding shielding the light flux in the upper surface direction, Noise performance and startability can be improved by the metal plate. Moreover, when the luminaire is viewed from below, the appearance is good because the metal plate cannot be seen.
[0035]
According to a third aspect of the present invention, the discharge lamp is a double ring discharge lamp, and the gap between the outer diameter of the discharge tube on the inner ring side of the double ring discharge lamp and the inner diameter of the discharge tube on the outer ring side is closed. Since the metal plate is disposed on the surface, the light flux in the lower surface direction can be enhanced, and the noise performance and the startability can be improved.
[0036]
According to the fourth aspect of the present invention, the outer diameter of the annular metal plate is smaller than the diameter of the circle drawn by the center of the discharge tube cross section of the annular discharge lamp, and is arranged on the inner side. It is difficult and noise performance and startability can be improved.
[0037]
In Claim 5, it has the metal discharge lamp support tool which contact | connects a discharge lamp directly separately from the socket part which connects a discharge lamp, and this discharge lamp support tool and a metal plate are directly electrically connected. Therefore, the effect of improving noise performance and startability is obtained by the discharge lamp support together with the metal plate.
[0038]
In Claim 6, since the connection point of a discharge lamp support tool and a metal plate exists in the same position as the connection point of a metal plate and the metal part of the outline of a high frequency lighting device, it is from a discharge lamp support tool of a high frequency lighting device. The distance to the metal part of the outer shell becomes the shortest, contributing to the improvement of noise performance and startability.
[0039]
In claim 7, since the line connecting the center of the discharge tube cross section of the discharge lamp and the center of the width of the metal plate is orthogonal to the metal plate, the metal plate is opposed to the discharge tube of the discharge lamp. In addition, noise performance and startability can be improved.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a lighting fixture according to a first embodiment of the present invention.
FIG. 2 is an enlarged view of a portion A in FIG.
FIG. 3 is a plan view of the discharge lamp of the luminaire of FIG. 1 as viewed from vertically below.
FIG. 4 is a sectional view of a lighting fixture according to a second embodiment of the present invention.
FIG. 5 is an enlarged view of a part A in FIG. 4;
6 is a plan view of the discharge lamp of the luminaire of FIG. 4 as viewed from vertically below.
FIG. 7 is a cross-sectional view of a lighting fixture according to a third embodiment of the present invention.
8 is an enlarged view of a part A in FIG. 7;
9 is a plan view of the discharge lamp of the luminaire of FIG. 7 as viewed from vertically below.
[Explanation of symbols]
1,14 Discharge lamp 2 High frequency lighting device 3 Upper resin cover 4 Lower resin cover 5 Ceiling surfaces 7, 12, 15 Metal plates 9, 13, 16 Discharge lamp support 11 Double ring discharge lamps 11a, 11b Discharge tube 11c Gap

Claims

A ring-shaped discharge lamp, a high-frequency lighting device that fits within the inner diameter of the discharge lamp, and a light-transmitting resin cover disposed on the upper and lower sides of the discharge lamp, both above and below the discharge lamp In the ceiling-mounted lighting fixture in which the luminous flux can be obtained from the lamp, the luminous flux in the upper surface direction can be completely blocked between the discharge lamp and the upper resin cover so as to follow the ring shape of the discharge lamp. An illuminating apparatus comprising: a non-circular metal plate, wherein the metal plate is electrically connected to a metal portion of an outline of the high-frequency lighting device.

The inner diameter of the ring-shaped metal plate is equal to or larger than the inner diameter of the ring-shaped discharge lamp, and the outer diameter of the metal plate is equal to or smaller than the outer diameter of the discharge lamp. The lighting apparatus according to claim 1, wherein the discharge lamp is completely hidden by the discharge lamp except for the joint portion of the lamp and the discharge lamp is not completely hidden by the metal plate when viewed from above.

The discharge lamp is a double ring type discharge lamp, and a metal plate is arranged so as to close the gap between the outer diameter of the inner ring side discharge tube and the inner diameter of the outer ring side discharge tube of this double ring type discharge lamp. The lighting fixture according to claim 1.

The luminaire according to claim 1, wherein the outer diameter of the annular metal plate is smaller than the diameter of a circle drawn by the center of the cross section of the discharge tube of the annular discharge lamp, and is disposed on the inner side.

2. A metal discharge lamp support that is in direct contact with the discharge lamp separately from a socket portion that connects the discharge lamp, and the discharge lamp support and the metal plate are directly electrically connected. , 2, 3 or 4.

The lighting fixture according to claim 5, wherein a connection point between the discharge lamp support and the metal plate is at a position common to a connection point between the metal plate and a metal portion of the outer shell of the high-frequency lighting device.

The lighting fixture according to claim 1, wherein a line connecting the center of the discharge tube cross section of the discharge lamp and the center of the width of the metal plate is orthogonal to the metal plate.