JP3663637B2

JP3663637B2 - lighting equipment

Info

Publication number: JP3663637B2
Application number: JP13699894A
Authority: JP
Inventors: 渉田中; 修倉光; 文明小林; 金之村瀬
Original assignee: Matsushita Electric Works Ltd
Current assignee: Panasonic Electric Works Co Ltd
Priority date: 1994-06-20
Filing date: 1994-06-20
Publication date: 2005-06-22
Anticipated expiration: 2020-06-22
Also published as: JPH087628A

Description

【０００１】
【産業上の利用分野】
本発明は、反射板を有してなる照明器具に関するものである。
【０００２】
【従来の技術】
図４は、従来の照明器具を示すものであり、この照明器具は、下方に開口した略筒状の器具本体１と、その器具本体１内に収納される反射板２と、ランプ３とを有して構成されている。
【０００３】
反射板２は、略回転２次曲面体状の外形を有し、その内側にランプ３が配設されてなり、内面側がランプ３の光を反射する反射面２ａとされており、その反射面２ａは、配光の制御や、器具効率及び器具設計等の点から、その表面の仕上げがＡｌ蒸着や、Ａｇ蒸着、電解研磨、アルマイト加工等により鏡面仕上げとされている。
【０００４】
【発明が解決しようとする課題】
しかしながら、上述のように構成された従来の照明器具においては、照明器具の消灯時において、反射板２の反射面２ａが鏡面仕上げされているために、照明器具の外部から入射した光に対して反射面２ａでの拡散性が低く、照明器具を前面側から見ると、前面側から見える面である反射板２の表面が暗く見えて見栄えが悪く、不快感を与えるという問題点があった。
【０００５】
本発明は、上記の問題点を改善するためになされたもので、その目的とするところは、照明器具の消灯時に、反射板の表面が暗く見えることを防いで、見栄えが良く、不快感を与えることのない照明器具を提供することにある。
【０００６】
【課題を解決するための手段】
本発明は上記の問題点を解決するため、請求項１記載の発明にあっては、少なくとも前面に開口しランプ３からの光を反射する反射面２ａを備えた反射板２を有してなる照明器具において、前記反射面２ａを断面が略階段状で且つ該階段状の段部を略前面に向くように形成すると共に、該反射面２ａの階段状の段部２ｂを乱反射面とし、段部以外の面を鏡面としたことを特徴とするものである。
【０００７】
また、請求項２記載の発明にあっては、前記反射面２ａを温度により変形させ、前記段部２ｂを前記ランプ３の消灯時にのみ露出させて、前記ランプ３の消灯時にのみ前記反射面２ａを階段状としたことを特徴とするものである。
【０００８】
また、請求項３記載の発明にあっては、前記反射板２を、一端側に段部２ｂを有する形状記憶合金製の小片２ｃを、前記ランプ３の周を略囲う反射板支持体２ｄの内面側に、前記小片２ｃの一端側を前面側として組み合わせて形成したことを特徴とするものである。
【０００９】
さらには、請求項４記載の発明にあっては、前記反射板２を、一端側に段部２ｂを有する熱膨張率の異なる２種類の金属を重ねた小片２ｃを、前記ランプ３の周を略囲う反射板支持体２ｄの内面側に、前記小片２ｃの一端側を前面側として組み合わせて形成したことを特徴とするものである。
【００１０】
【作用】
以上のように本発明は、請求項１記載の発明にあっては、少なくとも前面に開口しランプ３からの光を反射する反射面２ａを備えた反射板２を有してなる照明器具において、前記反射面２ａを断面が略階段状で且つ該階段状の段部を略前面に向くように形成すると共に、該反射面２ａの階段状の段部２ｂを乱反射面とし、段部以外の面を鏡面としたため、ランプ３の消灯時には、照明器具の前面側から見える乱反射面とされた段部２ｂが、照明器具の外部から入射する光を乱反射して拡散させ、これにより反射板２の表面が暗く見えることがなくなって、照明器具の消灯時の見栄えが良くなり、不快感を与えることがなくなる。
【００１１】
また、請求項２乃至請求項４記載の発明にあっては、前記反射面２ａを温度により変形させ、前記段部２ｂを前記ランプ３の消灯時にのみ露出させて、前記ランプ３の消灯時にのみ前記反射面２ａを階段状としたため、ランプ３の点灯時には段部２ｂが露出せず反射面２ａは所定の反射面２ａを保って、配光の変化や、器具効率の低下を招くこともなくなる。
【００１２】
【実施例】
図１は、本発明の照明器具の第１の実施例を示すものであり、前記従来例と異なる点は、反射板２であり、他は前記従来例と同様に構成されている。
【００１３】
反射板２は、ＡＢＳ樹脂を成形して前面側である下面側に開口を有する、外形が略回転２次曲面体状とされ、その内側の中心軸上にランプ３が配設されてなり、内面側がランプ３の光を反射する反射面２ａとされている。また、その反射面２ａは断面が略階段状とされ、その段部２ｂを除く面は、配光の制御や、器具効率及び器具設計等の点から、その表面の仕上げがＡｌ蒸着により鏡面仕上げとされて、ランプ３の点灯時にはランプ３からの光を反射し配光を制御する面とされ、段部２ｂには、Ａｌ蒸着をせずＡＢＳ樹脂の白色の面を露出させて乱反射面として、ランプ３の点灯時の配光の制御には殆ど利用されない面としている。
【００１４】
このように構成されているため、ランプ３の点灯時には、主として鏡面仕上げされた反射面２ａの段部２ｂを除く面により配光の制御がされ、ランプ３の消灯時には、照明器具の前面側である下面側から見える乱反射面である白色の段部２ｂが、照明器具の外部から入射する光を乱反射して拡散させ、これにより反射板２の表面が暗く見えることがなくなって、照明器具の消灯時の見栄えが良くなり、不快感を与えることがなくなる。
【００１５】
なお、前記第１の実施例において、反射面２ａの段部２ｂを除く面に、Ａｌ蒸着に代えてアルマイト加工を行って表面を鏡面仕上げとし、段部２ｂには乳白アクリルの塗料を塗布し乱反射面としたようなものであっても良く、この場合においても、前記第１の実施例と同様の効果を奏する。また、反射板２をＡＢＳに代えてＡｌ材により形成し、その内面側を電解研磨により鏡面仕上げを行い、段部２ｂに白色塗料を塗布したようなものであっても良く、この場合においても、前記第１の実施例と同様の効果を奏する。
【００１６】
図２は、本発明の照明器具の第２の実施例を示すものであり、前記第１の実施例と異なる点は、反射板２であり、他は前記第１の実施例と同様に構成されている。
【００１７】
反射板２は、ランプ３の周を略囲い略回転２次曲面を有する反射板支持体２ｄの内面側に、複数の小片２ｃを取り付けて構成したものであり、その小片２ｃは、Ｎｉ／Ａｌ合金（形状記憶合金）により形成され、一端側に段部２ｂを有してその形状が略Ｌ字状に形成
されており段部２ｂを除く面は、反射面２ａとしての曲面を有し、その表面は鏡面仕上げとされ、段部２ｂは白色塗料等により乱反射面とされている。
【００１８】
このような小片２ｃは、反射板２の任意の縦断面を考えると、その一端側の段部２ｂの先端側を反射板支持体２ｄ側に向け、その一端側を前面側である下側として、任意の１つの小片２ｃの他端側と、その上側に位置する小片２ｃの一端側が、重なることなく略当接するように配設され、その他端側である小片２ｃの上端近傍で反射板支持体２ｄに固着され、さらに一端側がバネ２ｅを介して反射板支持体２ｄに固着されている。
【００１９】
つまり、小片２ｃは、ランプ３の消灯時であって、その温度が略室温レベルである場合には、その一端側が反射板２の内側に突出して段部２ｂが露出した同図(a) に示すような階段状の一部を形成する形状であり、ランプ３が点灯されて温度が上昇したときには、同図(b) に示すように従来例と同様に反射面２ａが滑らかとなるように、その形状を記憶させており、上記バネ２ｅは、ランプ３の点灯時に形状記憶合金である小片２ｃが、記憶した形状に変化できるバネ定数を持つものとされている。
【００２０】
このように構成されているため、本実施例における照明器具においては、前記第１の実施例と同様の効果を奏すると共に、ランプ３の点灯時には、小片２ｃが記憶された形状に復元されて段部２ｂが露出せず、反射面２ａが従来の反射板２と同様の滑らかな所定の反射面２ａを保って、配光や器具効率に影響を与えることがない。
【００２１】
図３は、本発明の照明器具の第３の実施例を示すものであり、前記第２の実施例と異なる点は、反射板２であり、他は前記第２の実施例と同様に構成されている。
【００２２】
反射板２は、前記第２の実施例と同様に、反射板支持体２ｄの内面側に、複数の小片２ｃを取り付けて構成したものであり、その小片２ｃが、形状記憶合金に代えて、熱膨張率の異なる２種類の金属を重ねた部材（バイメタル）により構成され、その小片２ｃの一端側は、前記第２の実施例におけるバネ２ｅを設けず、したがって、小片２ｃは、その他端側である上側でのみ反射板支持体２ｄに取り付けられたものである。
【００２３】
つまり、小片２ｃは、その反射板支持体２ｄ側がＮｉとされ、反射板２の内側であるランプ３側がＡｌとされたバイメタルにより構成されており、ランプ３の消灯時には同図(a) のように段部２ｂが露出した形状とされ、ランプ３が点灯されて温度が上昇すると、Ａｌの熱膨張計数（0.2313）＞Ｎｉの熱膨張計数（0.1510）であるために、小片２ｃは変形して同図(b) のように段部２ｂが隠蔽された状態とななり、このとき、温度がさらに上昇しても、段部２ｂの先端が反射板支持体２ｄに当接しているため、小片２ｃは、それ以上は変形せず、所定の反射面２ａを保つ。また、ランプ３が消灯されて温度が下がれば、小片２ｃは再び同図(a) の状態に戻る。このように構成しても、前記第２の実施例と同様の効果を奏する。
【００２４】
なお、前記各実施例においては反射板の形状を、略回転２次曲面を有するものとして説明を行ったが、本発明はこれに限らず、円錐台状の外形を有するもの等、どのような形状のものであっても良く、また、前記各実施例において、乱反射面とされる段部２ｂは、その表面をあらして凹凸を設けたようなものであっても良い。
【００２５】
【発明の効果】
このように本発明は、請求項１記載の発明にあっては、少なくとも前面に開口しランプからの光を反射する反射面を備えた反射板を有してなる照明器具において、前記反射面を断面が階段状で且つ該階段状の段部を略前面に向くように形成すると共に、該反射面の階段状の段部を乱反射面とし、段部以外の面を鏡面としたため、ランプの消灯時には、照明器具の前面側から見える乱反射面とされた段部が、照明器具の外部から入射する光を乱反射して拡散させ、これにより反射板の表面が暗く見えることがなくなって、照明器具の消灯時の見栄えが良くなり、不快感を与えることがなくなる。
【００２６】
また、請求項２乃至請求項４記載の発明にあっては、前記反射面を温度により変形させ、前記段部を前記ランプの消灯時にのみ露出させて、前記ランプの消灯時にのみ前記反射面を階段状としたため、請求項１記載の発明の効果に加えて、ランプの点灯時には段部が露出せず反射面は所定の反射面を保って、配光の変化や、器具効率の低下を招くこともなくなる。
【図面の簡単な説明】
【図１】本発明の照明器具の第１の実施例の要部断面図である。
【図２】本発明の照明器具の第２の実施例に係る反射板の要部を示すもので、(a) はランプ消灯時の断面図、(b) はランプ点灯時の断面図である。
【図３】本発明の照明器具の第３の実施例に係る反射板の要部を示すもので、(a) はランプ消灯時の断面図、(b) はランプ点灯時の断面図である。
【図４】従来の照明器具を示す一部断面正面図である。
【符号の説明】
２反射板
２ａ反射面
２ｂ段部
２ｃ小片
２ｄ反射板支持体
３ランプ[0001]
[Industrial application fields]
The present invention relates to a lighting fixture having a reflector.
[0002]
[Prior art]
FIG. 4 shows a conventional lighting fixture. This lighting fixture includes a substantially cylindrical fixture main body 1 opened downward, a reflector 2 housed in the fixture main body 1, and a lamp 3. It is configured.
[0003]
The reflecting plate 2 has a substantially rotating quadric curved outer shape, the lamp 3 is disposed on the inner side thereof, and the inner surface side is a reflecting surface 2a that reflects the light of the lamp 3, and the reflecting surface. The surface finish of 2a is mirror-finished by Al deposition, Ag deposition, electrolytic polishing, anodizing, or the like from the viewpoints of light distribution control, instrument efficiency, instrument design, and the like.
[0004]
[Problems to be solved by the invention]
However, in the conventional lighting fixture configured as described above, the reflection surface 2a of the reflection plate 2 is mirror-finished when the lighting fixture is turned off. There is a problem in that the diffusibility at the reflecting surface 2a is low, and when the luminaire is viewed from the front side, the surface of the reflecting plate 2, which is the surface that can be seen from the front side, looks dark and looks unpleasant.
[0005]
The present invention has been made to remedy the above problems, and its purpose is to prevent the surface of the reflector plate from appearing dark when the lighting apparatus is turned off, and to improve the appearance and discomfort. It is to provide a lighting fixture that does not give.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention has a reflecting plate 2 having a reflecting surface 2a that opens at least on the front surface and reflects light from the lamp 3. in the luminaire, with the reflecting surface 2a is cross-sectional and formed so as to face the stepped stage portion substantially front with a substantially step-like, stepped stepped portion 2b of the reflection surface 2a and irregular reflection surface, stage The surface other than the part is a mirror surface .
[0007]
According to the second aspect of the present invention, the reflecting surface 2a is deformed by temperature, the stepped portion 2b is exposed only when the lamp 3 is turned off, and the reflecting surface 2a is only turned off when the lamp 3 is turned off. Is characterized by a stepped shape.
[0008]
In the invention according to claim 3, the reflector 2 is formed of a shape memory alloy piece 2c having a step 2b on one end side, and a reflector support 2d that substantially surrounds the periphery of the lamp 3. The inner surface is formed by combining one end side of the small piece 2c as the front side.
[0009]
Furthermore, in the invention according to claim 4, the reflector 2 is provided with a small piece 2c having a stepped portion 2b on one end side and two kinds of metals having different thermal expansion coefficients stacked on each other. It is characterized in that it is formed by combining one end side of the small piece 2c as the front side on the inner surface side of the substantially supporting reflector support 2d.
[0010]
[Action]
As described above, in the invention according to the first aspect of the present invention, in the lighting fixture having the reflecting plate 2 provided with the reflecting surface 2a that opens at least on the front surface and reflects the light from the lamp 3, The reflective surface 2a is formed so that the cross section is substantially stepped and the stepped stepped portion faces the front surface, and the stepped stepped portion 2b of the reflecting surface 2a is an irregularly reflecting surface. due to the mirror surface, at the time of extinction of the lamp 3, the irregular reflection surface and has been stepped portion 2b which is visible from the front side of the luminaire, and diffuse the light incident from the outside of the luminaire is diffused, thereby the surface of the reflector 2 No longer looks dark, the lighting device looks better when turned off, and no discomfort.
[0011]
In the inventions according to claims 2 to 4, the reflecting surface 2a is deformed by temperature, the stepped portion 2b is exposed only when the lamp 3 is turned off, and only when the lamp 3 is turned off. Since the reflecting surface 2a has a stepped shape, the stepped portion 2b is not exposed when the lamp 3 is lit, and the reflecting surface 2a maintains the predetermined reflecting surface 2a, so that the light distribution is not changed and the efficiency of the appliance is not lowered. .
[0012]
【Example】
FIG. 1 shows a first embodiment of a lighting fixture according to the present invention. The difference from the conventional example is a reflector 2, and the rest is configured in the same manner as the conventional example.
[0013]
The reflection plate 2 is formed of ABS resin and has an opening on the lower surface side, which is the front surface side, and the outer shape is a substantially rotating quadratic curved body, and the lamp 3 is disposed on the inner central axis thereof. The inner surface side is a reflecting surface 2 a that reflects the light of the lamp 3. The reflecting surface 2a has a substantially stepped cross section, and the surfaces other than the stepped portion 2b are mirror-finished by Al deposition from the viewpoint of light distribution control, device efficiency, and device design. When the lamp 3 is turned on, it is a surface that reflects light from the lamp 3 to control light distribution, and the stepped portion 2b is exposed to the white surface of the ABS resin without vapor deposition of Al to serve as a diffuse reflection surface. The surface is hardly used for controlling the light distribution when the lamp 3 is turned on.
[0014]
With this configuration, when the lamp 3 is turned on, the light distribution is controlled mainly by the surface except the stepped portion 2b of the mirror-finished reflecting surface 2a. When the lamp 3 is turned off, the light distribution is controlled on the front side of the lighting fixture. The white step 2b, which is a diffuse reflection surface visible from the lower surface side, diffuses and diffuses light incident from the outside of the lighting fixture, so that the surface of the reflector 2 does not appear dark, and the lighting fixture is turned off. The appearance of the time is improved, and no discomfort is given.
[0015]
In the first embodiment, the surface of the reflecting surface 2a excluding the step 2b is anodized in place of Al deposition so that the surface is mirror-finished, and milky acrylic paint is applied to the step 2b. A diffused reflection surface may be used, and in this case, the same effect as that of the first embodiment can be obtained. Further, the reflector 2 may be made of an Al material instead of ABS, and the inner surface thereof may be mirror-finished by electrolytic polishing, and a white paint may be applied to the stepped portion 2b. The same effects as those of the first embodiment are obtained.
[0016]
FIG. 2 shows a second embodiment of the luminaire of the present invention. The difference from the first embodiment is the reflector 2, and the rest is configured in the same manner as the first embodiment. Has been.
[0017]
The reflecting plate 2 is configured by attaching a plurality of small pieces 2c to the inner surface side of a reflecting plate support 2d that substantially surrounds the periphery of the lamp 3 and has a substantially rotating quadratic curved surface. The small pieces 2c are formed of Ni / Al. It is formed of an alloy (shape memory alloy), has a step portion 2b on one end side, the shape is formed in a substantially L shape, and the surface excluding the step portion 2b has a curved surface as the reflection surface 2a, The surface is mirror-finished, and the stepped portion 2b is a diffusely reflecting surface made of white paint or the like.
[0018]
Considering an arbitrary longitudinal section of the reflecting plate 2, such a small piece 2c has its one end side facing the reflecting plate support 2d and its one end side is the lower side which is the front side. The other end side of any one small piece 2c and the one end side of the small piece 2c located above the small piece 2c are arranged so as to be substantially in contact with each other without overlapping, and the reflector is supported near the upper end of the small piece 2c on the other end side. It is fixed to the body 2d, and one end side is fixed to the reflector support 2d via the spring 2e.
[0019]
That is, when the lamp 3 is turned off and its temperature is substantially at room temperature, the small piece 2c projects to the inside of the reflecting plate 2 so that the step 2b is exposed in FIG. When the lamp 3 is turned on and the temperature rises, the reflecting surface 2a is made smooth as in the conventional example, as shown in FIG. The spring 2e has a spring constant that allows the small piece 2c, which is a shape memory alloy when the lamp 3 is turned on, to change to the stored shape.
[0020]
With this configuration, the lighting apparatus according to this embodiment has the same effects as those of the first embodiment, and when the lamp 3 is turned on, the small piece 2c is restored to the stored shape. The part 2b is not exposed, and the reflection surface 2a maintains the same smooth predetermined reflection surface 2a as the conventional reflection plate 2, so that the light distribution and the instrument efficiency are not affected.
[0021]
FIG. 3 shows a third embodiment of the luminaire of the present invention. The difference from the second embodiment is the reflector 2, and the rest is configured in the same manner as the second embodiment. Has been.
[0022]
Similar to the second embodiment, the reflecting plate 2 is configured by attaching a plurality of small pieces 2c to the inner surface side of the reflecting plate support 2d, and the small pieces 2c are replaced with shape memory alloys. It is constituted by a member (bimetal) in which two kinds of metals having different thermal expansion coefficients are stacked, and one end side of the small piece 2c is not provided with the spring 2e in the second embodiment, and therefore the small piece 2c is provided on the other end side. It is attached to the reflector support 2d only on the upper side.
[0023]
That is, the small piece 2c is composed of a bimetal in which the reflecting plate support 2d side is Ni and the lamp 3 side inside the reflecting plate 2 is Al, and when the lamp 3 is turned off, as shown in FIG. When the lamp 3 is turned on and the temperature rises, the thermal expansion coefficient of Al (0.2313)> the thermal expansion coefficient of Ni (0.1510), so that the small piece 2c is deformed. As shown in FIG. 2B, the stepped portion 2b is concealed. At this time, even if the temperature further rises, the tip of the stepped portion 2b is in contact with the reflecting plate support 2d. 2c does not deform any more and keeps the predetermined reflecting surface 2a. When the lamp 3 is turned off and the temperature is lowered, the small piece 2c returns to the state shown in FIG. Even if comprised in this way, there exists an effect similar to the said 2nd Example.
[0024]
In each of the embodiments described above, the shape of the reflecting plate has been described as having a substantially rotating quadratic curved surface. However, the present invention is not limited to this, and any shape such as one having a frustoconical outer shape may be used. The shape may be a shape, and in each of the above-described embodiments, the stepped portion 2b which is the irregular reflection surface may be a surface having a rough surface provided with irregularities.
[0025]
【The invention's effect】
Thus, according to the first aspect of the present invention, there is provided a lighting apparatus having a reflecting plate having a reflecting surface that opens at least on the front surface and reflects light from the lamp. The cross section is stepped and the stepped stepped portion is formed so as to face the front surface, the stepped stepped portion of the reflecting surface is a diffusely reflecting surface, and the surface other than the stepped portion is a mirror surface. In some cases, the stepped portion, which is a diffusely reflective surface visible from the front side of the lighting fixture, diffuses and diffuses light incident from the outside of the lighting fixture, thereby preventing the surface of the reflector from appearing dark, Appearance when the lights are turned off is improved, and there is no discomfort.
[0026]
In the invention of claim 2 to claim 4, the reflecting surface is deformed by temperature, the stepped portion is exposed only when the lamp is turned off, and the reflecting surface is formed only when the lamp is turned off. In addition to the effect of the first aspect of the present invention, the stepped portion is not exposed when the lamp is turned on, and the reflecting surface keeps the predetermined reflecting surface when the lamp is turned on, resulting in a change in light distribution and a decrease in the efficiency of the appliance. Nothing will happen.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an essential part of a first embodiment of a lighting fixture of the present invention.
FIGS. 2A and 2B show a main part of a reflector according to a second embodiment of the lighting apparatus of the present invention, wherein FIG. 2A is a sectional view when the lamp is turned off, and FIG. 2B is a sectional view when the lamp is turned on. .
FIGS. 3A and 3B show a main part of a reflector according to a third embodiment of the lighting apparatus of the present invention, wherein FIG. 3A is a sectional view when the lamp is turned off, and FIG. 3B is a sectional view when the lamp is turned on. .
FIG. 4 is a partial cross-sectional front view showing a conventional lighting fixture.
[Explanation of symbols]
2 Reflecting plate 2a Reflecting surface 2b Stepped portion 2c Small piece 2d Reflecting plate support 3 Lamp

Claims

In a lighting fixture having a reflecting plate having a reflecting surface that opens at least on the front surface and reflects light from a lamp, the reflecting surface has a substantially stepped cross section , and the stepped step portion faces a substantially front surface. And a stepped step portion of the reflecting surface is a diffusely reflecting surface, and a surface other than the stepped portion is a mirror surface .

The lighting apparatus according to claim 1, wherein the reflecting surface is deformed by temperature, the stepped portion is exposed only when the lamp is turned off, and the reflecting surface is stepped only when the lamp is turned off.

The reflector is formed by combining a small piece of shape memory alloy having a stepped portion on one end side on the inner surface side of the reflector support body that substantially surrounds the periphery of the lamp, with one end side of the small piece being the front side. The lighting fixture according to claim 2.

A small piece of two kinds of metals having different thermal expansion coefficients, having a stepped portion on one end side, is placed on the inner surface side of the reflector support body that substantially surrounds the periphery of the lamp, and one end side of the small piece is the front surface. The lighting fixture according to claim 2, wherein the lighting fixture is formed in combination as a side.