JP7028594B2 - lighting equipment - Google Patents

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JP7028594B2
JP7028594B2 JP2017181470A JP2017181470A JP7028594B2 JP 7028594 B2 JP7028594 B2 JP 7028594B2 JP 2017181470 A JP2017181470 A JP 2017181470A JP 2017181470 A JP2017181470 A JP 2017181470A JP 7028594 B2 JP7028594 B2 JP 7028594B2
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light
angle
distribution angle
reflector
light distribution
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JP2019057435A (en
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赫禹 孫
幸夫 柿沼
俊一 佐々木
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Eye Lighting Systems Corp
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Eye Lighting Systems Corp
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Description

本発明は、照明器具に関する。 The present invention relates to a lighting fixture.

反射鏡を有した照明器具において、この反射鏡の出射開口に、光を拡散する拡散カバーを設け、反射鏡による反射光を拡散カバーで拡散する技術が知られている(例えば、特許文献1参照)。この技術によれば、拡散により被照射面での照度ムラが抑えられる。
また、反射鏡を有した照明器具において、反射鏡による反射光を、光学レンズで制御することで、所望の配光角の照明光を得る技術も知られている(例えば、特許文献2参照)。
In a lighting fixture having a reflector, a technique is known in which a diffuser cover for diffusing light is provided at the exit opening of the reflector and the light reflected by the reflector is diffused by the diffuser cover (see, for example, Patent Document 1). ). According to this technique, uneven illuminance on the irradiated surface can be suppressed by diffusion.
Further, there is also known a technique for obtaining illumination light having a desired light distribution angle by controlling the reflected light by the reflecting mirror with an optical lens in a lighting fixture having a reflecting mirror (see, for example, Patent Document 2). ..

特開2017-059498号公報Japanese Unexamined Patent Publication No. 2017-059498 国際公開第2016/039130号International Publication No. 2016/039130

特許文献2のように、照明光の配光角を光学レンズで制御するとグレアが生じ易い。
一方、特許文献1の技術では、模型様が表面に描かれた型押しガラス(型板ガラスとも呼ばれる)が拡散カバーに用いられている。この拡散カバーは、入射する光をランダムな拡散角で拡散するので、グレアを抑制できるものの、照明光の配光角制御が難しくなる。
As in Patent Document 2, when the light distribution angle of the illumination light is controlled by an optical lens, glare is likely to occur.
On the other hand, in the technique of Patent Document 1, embossed glass (also called template glass) on which a model is drawn on the surface is used for the diffusion cover. Since this diffusion cover diffuses the incident light at a random diffusion angle, glare can be suppressed, but it becomes difficult to control the light distribution angle of the illumination light.

本発明は、グレアを抑えつつ、所望の配光角の照明光を容易に得ることができる照明器具を提供することを目的とする。 An object of the present invention is to provide a luminaire capable of easily obtaining illuminating light having a desired light distribution angle while suppressing glare.

本発明は、光源と、前記光源の光を反射する反射面と、を備え、第1配光角の照明光を出射する照明器具において、前記反射面による反射光を一定の拡散角で拡散するシート状の光拡散部材と、前記反射面を有した反射鏡と、前記反射鏡の外面に密着して覆う外側カバーと、を備え、前記反射光が、前記第1配光角よりも小さな第2配光角を有し、前記光拡散部材が、前記第1配光角と前記第2配光角との差に相当する前記一定の拡散角で前記反射光を拡散し、前記反射鏡は、前記反射面の底部に前記光源が設けられ、前記反射鏡には、前記光源に一端部が熱的に結合され、他端部が前記反射面の出射開口の側に延びる複数のヒートパイプが設けられており、前記ヒートパイプは、前記反射鏡の外面に設けられ、当該反射鏡と前記外側カバーとによって挟まれている、ことを特徴とする。 The present invention comprises a light source and a reflecting surface that reflects the light of the light source, and diffuses the reflected light by the reflecting surface at a constant diffusion angle in a lighting device that emits illumination light having a first light distribution angle. A sheet-shaped light diffusing member, a reflecting mirror having the reflecting surface, and an outer cover that closely covers the outer surface of the reflecting mirror, and the reflected light is smaller than the first light distribution angle. The light diffusing member has two light distribution angles, and the light diffusing member diffuses the reflected light at the constant diffusing angle corresponding to the difference between the first light distribution angle and the second light distribution angle. The light source is provided at the bottom of the reflecting surface, and the reflecting mirror has a plurality of heat pipes having one end thermally coupled to the light source and the other end extending toward the exit opening of the reflecting surface. The heat pipe is provided on the outer surface of the reflector and is sandwiched between the reflector and the outer cover .

本発明は、上記照明器具において、前記反射面の出射開口に設けられ、前記反射光を透過する板状の板状部材と、を備え、前記光拡散部材が前記板状部材とともに、前記反射面の出射開口に、カシメ加工により固定されている、ことを特徴とする。 INDUSTRIAL APPLICABILITY The present invention includes a plate-shaped plate-shaped member provided at an exit opening of the reflecting surface in the lighting fixture and transmitting the reflected light, and the light diffusing member is provided together with the plate-shaped member on the reflecting surface. It is characterized in that it is fixed to the exit opening of the light by caulking.

本発明は、上記照明器具において、前記反射面は、回転放物面であり、前記光拡散部材は、前記反射面によって平行光化された前記反射光を前記一定の拡散角で拡散し、前記第1配光角と前記第2配光角との差が、少なくとも10度以上である、ことを特徴とする。
In the present invention, in the luminaire, the reflective surface is a rotating parabolic surface, and the light diffusing member diffuses the reflected light paralleled by the reflective surface at the constant diffusion angle. The difference between the first light distribution angle and the second light distribution angle is at least 10 degrees or more.

本発明は、上記照明器具において、前記反射鏡には、前記ヒートパイプを収める溝部が形成されており、前記ヒートパイプが前記溝部に高熱伝導性接着剤で接合されている、ことを特徴とする。 The present invention is characterized in that, in the luminaire, the reflector is formed with a groove for accommodating the heat pipe, and the heat pipe is joined to the groove with a high thermal conductive adhesive. ..

本発明によれば、グレアを抑えつつ、所望の配光角を容易に得ることができる。 According to the present invention, a desired light distribution angle can be easily obtained while suppressing glare.

本発明の実施形態に係る照明器具の構成を示す側面図である。It is a side view which shows the structure of the lighting fixture which concerns on embodiment of this invention. 照明器具の平面図である。It is a top view of a lighting fixture. 照明器具の上面図である。It is a top view of a lighting fixture. 図1のIV-IV断面線から照明器具をみた図である。It is a figure which looked at the luminaire from the IV-IV cross-sectional line of FIG. 図1のV-V断面線から照明器具をみた図である。It is a figure which looked at the luminaire from the VV cross-sectional line of FIG. 図4の矢指X部の拡大図である。It is an enlarged view of the arrow finger X part of FIG. 本発明の変形例に係る照明器具の構成を示す側面図である。It is a side view which shows the structure of the luminaire which concerns on the modification of this invention. 図7のVIII-VIII断面線から照明器具をみた図である。It is a figure which looked at the luminaire from the VIII-VIII cross-sectional line of FIG. 図7のIX-IX断面線から照明器具をみた図である。It is a figure which looked at the luminaire from the IX-IX cross section of FIG. 照明器具の分解斜視図である。It is an exploded perspective view of a lighting fixture.

以下、図面を参照して本発明の実施形態について説明する。
図1、図2及び図3は本実施形態に係る照明器具1の構成を示す図であり、図1は側面図、図2は平面図、図3は上面図である。また図4は図1のIV-IV断面線から照明器具1をみた図であり、図5は図1のV-V断面線から照明器具1をみた図である。
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1, FIG. 2 and FIG. 3 are views showing the configuration of the lighting fixture 1 according to the present embodiment, FIG. 1 is a side view, FIG. 2 is a plan view, and FIG. 3 is a top view. Further, FIG. 4 is a view of the luminaire 1 from the IV-IV cross-sectional line of FIG. 1, and FIG. 5 is a view of the luminaire 1 from the VV cross-sectional line of FIG.

照明器具1は、主に屋内照明に用いられる器具であり、発光素子の一例であるLED9(図5)を光源とし、図1に示すように、配光角γで拡がる照明光K1を、被照射面内の照度が略均一になるように照射する。なお、本実施形態において、1/2照度角を配光角と定義する。
また、照明器具1は、グレアが抑えられており、人間の視界に入る位置に好適に設置できるように構成されている。したがって、工場や倉庫、スポーツ施設などでの高天井照明だけでなく商業施設や駅コンコース、家庭などでの低天井照明や、壁面からのサイド照明に好適に照明器具1を用いることができる。
The lighting fixture 1 is a fixture mainly used for indoor lighting, and uses LED 9 (FIG. 5), which is an example of a light emitting element, as a light source, and as shown in FIG. 1, is covered with illumination light K1 spreading at a light distribution angle γ. Irradiate so that the illuminance in the irradiation surface becomes substantially uniform. In this embodiment, the 1/2 illuminance angle is defined as the light distribution angle.
Further, the lighting fixture 1 is configured so that glare is suppressed and the lighting fixture 1 can be suitably installed at a position within the human field of view. Therefore, the lighting fixture 1 can be suitably used not only for high ceiling lighting in factories, warehouses, sports facilities, etc., but also for low ceiling lighting in commercial facilities, station concourses, homes, etc., and side lighting from a wall surface.

図1に示すように、照明器具1は、光源部2と、反射鏡4と、前面カバーユニット6(図2)と、天井面や壁面などへ固定のためのアーム8と、を備えている。
光源部2は、照明器具1の光源を含む部位であり、図4に示すように、LEDモジュール10と、LEDモジュール10を保持するホルダー12と、ホルダー12が固定されるベース部14と、を備えている。
As shown in FIG. 1, the luminaire 1 includes a light source unit 2, a reflector 4, a front cover unit 6 (FIG. 2), and an arm 8 for fixing to a ceiling surface, a wall surface, or the like. ..
The light source unit 2 is a portion including the light source of the lighting fixture 1, and as shown in FIG. 4, the LED module 10, the holder 12 for holding the LED module 10, and the base unit 14 to which the holder 12 is fixed are provided. I have.

LEDモジュール10は、光源たるLED9と、このLED9が実装された基板と、を有し、LED9には、平面視略円形の発光面9Aを有するCOB型LEDが用いられている。図5に示すように、ホルダー12は、LED9の発光面9Aを露出させた状態でLEDモジュール10を脱落不能に保持する保持具である。ベース部14は、略円板状の部材であり、図4に示すように、その表面14Aにホルダー12が固定され、また裏面14Bには多数の放熱フィン16が一体に形成されている。放熱フィン16及びベース部14は、LED9の熱を効率良く放熱するために、放熱性に優れた材料(例えばアルミニウム合金)を原料に鋳造によって一体形成され、いわゆるヒートシンクとして機能する。
またベース部14の裏面14Bには、筒状の配線部18が立設されている。配線部18には、LED9の点灯電力などを伝送する電気配線が通され、光源部2の中でLEDモジュール10に接続される。また、ベース部14には上記アーム8が回転自在に設けられている。
The LED module 10 includes an LED 9 as a light source and a substrate on which the LED 9 is mounted, and a COB type LED having a light emitting surface 9A having a substantially circular shape in a plan view is used for the LED 9. As shown in FIG. 5, the holder 12 is a holder that holds the LED module 10 in a state where the light emitting surface 9A of the LED 9 is exposed so as not to fall off. The base portion 14 is a substantially disk-shaped member, and as shown in FIG. 4, the holder 12 is fixed to the front surface 14A, and a large number of heat radiation fins 16 are integrally formed on the back surface 14B. The heat dissipation fin 16 and the base portion 14 are integrally formed by casting a material having excellent heat dissipation (for example, an aluminum alloy) in order to efficiently dissipate the heat of the LED 9, and function as a so-called heat sink.
Further, a cylindrical wiring portion 18 is erected on the back surface 14B of the base portion 14. Electrical wiring for transmitting the lighting power of the LED 9 and the like is passed through the wiring unit 18, and is connected to the LED module 10 in the light source unit 2. Further, the arm 8 is rotatably provided on the base portion 14.

反射鏡4は、LED9の放射光を制御する椀状の光制御部材であり、図4に示すように、内面に反射面5が形成されている。反射面5は、回転中心軸Qを中心した略回転放物面形状であり、その焦点位置に発光面9Aの発光中心O(図5)が配置されている。したがって、発光面9Aの放射光K2が反射面5による反射で略平行光化され、開口端である出射開口20(図4)の前面カバーユニット6を通って出射される。なお、発光面9Aの発光中心Oを反射面5の焦点位置以外に配置してもよい。発光面9Aの発光中心Oを、反射面5の光軸方向に沿って、焦点位置からずらして配置することにより配光角θを調整することもできる。
本実施形態では、反射面5の形状と理想的な回転放物面との間に僅かにズレがあり、また発光面9Aが点光源でない等の要因によって、反射面5での反射光K3は理想的な平行光(すなわち配光角θ=0度)にはならず、約6度の僅かな配光角θを有している。
The reflecting mirror 4 is a bowl-shaped light control member that controls the synchrotron radiation of the LED 9, and as shown in FIG. 4, the reflecting surface 5 is formed on the inner surface. The reflecting surface 5 has a substantially rotating parabolic shape centered on the rotation center axis Q, and the light emitting center O (FIG. 5) of the light emitting surface 9A is arranged at the focal position thereof. Therefore, the synchrotron radiation K2 of the light emitting surface 9A is made into substantially parallel light by the reflection by the reflecting surface 5, and is emitted through the front cover unit 6 of the exit opening 20 (FIG. 4) which is the opening end. The light emitting center O of the light emitting surface 9A may be arranged at a position other than the focal position of the reflecting surface 5. The light distribution angle θ can also be adjusted by arranging the light emitting center O of the light emitting surface 9A so as to be offset from the focal position along the optical axis direction of the reflecting surface 5.
In the present embodiment, the reflected light K3 on the reflecting surface 5 is caused by factors such as a slight deviation between the shape of the reflecting surface 5 and the ideal rotating parabolic surface, and the light emitting surface 9A is not a point light source. It does not have ideal parallel light (that is, light distribution angle θ = 0 degrees), and has a slight light distribution angle θ of about 6 degrees.

図4に示すように、反射鏡4の底部4Aには、光源部2のベース部14の表面14Aに面接触し密着する平面部19が形成されている。反射面5の内部には、平面部19にホルダー12が密着させて載置され、このホルダー12とベース部14とが平面部19を間に挟んでネジ等の締結部材で固定されている。ホルダー12は、平面部19を通じて反射鏡4、及びベース部14の各々と熱的に結合されるので、LED9の熱は、これら反射鏡4、及びヒートシンクとして機能するベース部14から効率良く放熱されることとなる。 As shown in FIG. 4, a flat surface portion 19 is formed on the bottom portion 4A of the reflecting mirror 4 so as to be in surface contact with and in close contact with the surface 14A of the base portion 14 of the light source portion 2. Inside the reflective surface 5, the holder 12 is placed in close contact with the flat surface portion 19, and the holder 12 and the base portion 14 are fixed with a fastening member such as a screw sandwiching the flat surface portion 19. Since the holder 12 is thermally coupled to each of the reflecting mirror 4 and the base portion 14 through the flat surface portion 19, the heat of the LED 9 is efficiently dissipated from the reflecting mirror 4 and the base portion 14 functioning as a heat sink. The Rukoto.

図6は、図4の矢指X部の拡大図である。
前面カバーユニット6は、出射開口20を閉じる保護部材であり、反射鏡4に、カシメ加工によって固定されている。具体的には、図6に示すように、反射鏡4の先端部22には、出射開口20の径方向に平面状に延びるカバー当接部24が形成されており、このカバー当接部24に前面カバーユニット6の縁部6Aが当接配置されている。そして、カバー当接部24の縁部24Bが、前面カバーユニット6の縁部6Aを包み込むようにカシメ加工され、これにより前面カバーユニット6が反射鏡4の先端部22に固定される。
FIG. 6 is an enlarged view of the arrow finger X portion of FIG.
The front cover unit 6 is a protective member that closes the exit opening 20, and is fixed to the reflector 4 by caulking. Specifically, as shown in FIG. 6, a cover contact portion 24 extending in a plane in the radial direction of the emission opening 20 is formed at the tip portion 22 of the reflector 4, and the cover contact portion 24 is formed. The edge portion 6A of the front cover unit 6 is arranged in contact with the front cover unit 6. Then, the edge portion 24B of the cover contact portion 24 is caulked so as to wrap the edge portion 6A of the front cover unit 6, whereby the front cover unit 6 is fixed to the tip portion 22 of the reflector 4.

前面カバーユニット6は、透光板30と、光拡散フィルム32と、パッキン34と、を備えている。
透光板30は、LED9の放射光を透過する透光性を有し、かつ、外部衝撃からの保護に十分な硬度を有する板状部材であり、本実施形態では、強化ガラスが透光板30に用いられている。
光拡散フィルム32は、入射する光を所定の拡散角δで拡散する拡散層を有した樹脂製のシート状の光拡散部材であり、透光板30の裏面(反射鏡4の内側の面)に、その全面を覆うように設けられている。
パッキン34は、透光板30の縁部に全周に亘って装着される部材であり、カシメ加工によって反射鏡4の先端部22に密着することで出射開口20を密閉する。またパッキン34は、断面コの字状であり、透光板30と光拡散フィルム32との両方を挟み込み、光拡散フィルム32の剥離を防止している。
The front cover unit 6 includes a light transmitting plate 30, a light diffusing film 32, and a packing 34.
The translucent plate 30 is a plate-shaped member having translucency that transmits the synchrotron radiation of the LED 9 and having sufficient hardness for protection from external impact. In the present embodiment, the tempered glass is a translucent plate. It is used in 30.
The light diffusion film 32 is a resin sheet-like light diffusion member having a diffusion layer that diffuses incident light at a predetermined diffusion angle δ, and is the back surface of the translucent plate 30 (the inner surface of the reflector 4). It is provided so as to cover the entire surface.
The packing 34 is a member that is attached to the edge of the translucent plate 30 over the entire circumference, and is brought into close contact with the tip 22 of the reflecting mirror 4 by caulking to seal the exit opening 20. Further, the packing 34 has a U-shaped cross section and sandwiches both the light-transmitting plate 30 and the light-diffusing film 32 to prevent the light-diffusing film 32 from peeling off.

カシメ加工時には、前面カバーユニット6の光拡散フィルム32が透光板30とともに同時に反射鏡4に固定されるので、光拡散フィルム32の取付作業が容易になっている。 At the time of caulking, the light diffusing film 32 of the front cover unit 6 is fixed to the reflecting mirror 4 at the same time as the light transmitting plate 30, so that the work of attaching the light diffusing film 32 is easy.

上述の光拡散フィルム32について更に詳述する。
光拡散フィルム32は、フロストガラスや型押しガラス等のように、入射した光をランダムな拡散角で拡散する(いわゆる散乱させる)ものではなく、所定の拡散角δで拡散する部材である。係る拡散特性を有する拡散部材としては、例えば、液晶表示装置のバックライトに用いられる光拡散フィルムや、液晶表示装置の表示面に貼付されて表示面の覗き見を防止するプリズムシートなどの光学シート材が挙げられる。
The above-mentioned light diffusing film 32 will be described in more detail.
The light diffusing film 32 is a member that does not diffuse (so-called scatter) the incident light at a random diffusion angle like frosted glass or embossed glass, but diffuses at a predetermined diffusion angle δ. Examples of the diffusing member having such diffusing characteristics include an optical diffusing film used for the backlight of a liquid crystal display device and an optical sheet such as a prism sheet attached to the display surface of the liquid crystal display device to prevent peeping on the display surface. The material is mentioned.

また光拡散フィルム32には、所望の配光角γの照明光K1を得るために必要な拡散角δ、すなわち反射光K3の配光角θと、照明光K1の配光角γとの差に相当する角度を有したものが用いられる。
本実施形態において、配光角γは、中照形、広照形、又は特広照形に相当する角度に設定されている。これら中照形、広照形、又は特広照形は、一般社団法人 日本照明工業会が策定したJIL4004-2004において、高天井照明分野の配光特性として規定されているものである。JIL4004-2004では、高天井照明分野の配光特性として、配光角が小さなものから順に、特狭照形(1/2照度角が14度未満)、狭照形(1/2照度角が14度以上19度未満)、中照形(1/2照度角が19度以上27度未満)、広照形(1/2照度角が27度以上37度未満)、及び特広照形(1/2照度角が37度以上)の5つが規定されている。
Further, in the light diffusion film 32, the difference between the diffusion angle δ required to obtain the illumination light K1 having a desired light distribution angle γ, that is, the light distribution angle θ of the reflected light K3 and the light distribution angle γ of the illumination light K1. The one having an angle corresponding to is used.
In the present embodiment, the light distribution angle γ is set to an angle corresponding to a medium-illuminated type, a wide-illuminated type, or a special wide-illuminated type. These medium-illuminated type, wide-illuminated type, or extra-wide-illuminated type are defined as the light distribution characteristics in the field of high-ceiling lighting in JIL4004-2004 formulated by the Japan Lighting Industry Association. In JIL4004-2004, as the light distribution characteristics in the field of high ceiling lighting, the special narrow illumination type (1/2 illuminance angle is less than 14 degrees) and the narrow illumination type (1/2 illuminance angle are in order) from the one with the smallest light distribution angle. 14 degrees or more and less than 19 degrees), medium illuminance type (1/2 illuminance angle is 19 degrees or more and less than 27 degrees), wide illuminance type (1/2 illuminance angle is 27 degrees or more and less than 37 degrees), and special wide illuminance type (1/2 illuminance angle is 27 degrees or more and less than 37 degrees) (1/2 illuminance angle is 37 degrees or more) is specified.

上述の通り、本実施形態では、反射光K3の配光角θは約6度(上記特狭照形に相当)なので、中照形以上の配光角γ(すなわち、配光角γが19度以上)を得るために、13度以上の一定の拡散角δを有した光拡散フィルム32が用いられることとなる。
なお、本実施形態では、光拡散フィルム32に、株式会社ツジデン製の拡散フィルム(製品型番「D121UP」、「D261S II J1」)を用いることで、中照形(配光角γ=21度)、広照形(配光角γ=29度)の配光を得ている。
As described above, in the present embodiment, the light distribution angle θ of the reflected light K3 is about 6 degrees (corresponding to the above-mentioned special narrow illumination type), so that the light distribution angle γ of the medium illumination type or higher (that is, the light distribution angle γ is 19). In order to obtain (degree or more), a light diffusion film 32 having a constant diffusion angle δ of 13 degrees or more is used.
In this embodiment, by using a diffusion film manufactured by Tsujiden Co., Ltd. (product model number "D121UP", "D261S II J1") for the light diffusion film 32, a medium illumination type (light distribution angle γ = 21 degrees) is used. , A wide-illuminated type (light distribution angle γ = 29 degrees) is obtained.

このように、本実施形態の照明器具1は、反射面5での反射による反射光K3を、一定の拡散角δを有する光拡散フィルム32で拡散させ、所定の配光角γの照明光K1を出射する構成となっている。
この構成により、配光角γの照明器具1を設計する際には、反射光K3の配光角θを実測し、この配光角θの実測値と配光角γとの差から、必要となる拡散角δを特定し、この拡散角δを有した光拡散フィルム32を出射開口20に設ければよく、照明器具1の設計が容易になる。
As described above, in the lighting fixture 1 of the present embodiment, the reflected light K3 reflected by the reflecting surface 5 is diffused by the light diffusion film 32 having a constant diffusion angle δ, and the illumination light K1 having a predetermined light distribution angle γ is diffused. Is configured to emit light.
With this configuration, when designing the lighting fixture 1 with the light distribution angle γ, the light distribution angle θ of the reflected light K3 is actually measured, and it is necessary from the difference between the measured value of the light distribution angle θ and the light distribution angle γ. It is sufficient to specify the diffusion angle δ to be, and to provide the light diffusion film 32 having this diffusion angle δ in the emission opening 20, which facilitates the design of the lighting fixture 1.

特に、例えば、フロストガラスや型押しガラス等によってランダムな拡散角で拡散させる構成に比べれば、設計の容易さは格段に向上する。
詳述すると、拡散部材の拡散角がランダムである場合、拡散部材の拡散の度合いと、配光角γとの相関関係が図り難い。したがって、通常、照明器具1の設計においては、拡散部材の拡散の度合いを変えて所望の配光角γを測定する、といった作業を繰り返して、拡散部材の選定が行われる。これに対して、本実施形態の照明器具1によれば、反射光K3の配光角θの実測だけで拡散角δを特定し、適切な光拡散フィルム32を選定できるので、設計作業が非常に容易となる。
また、フロストガラスや型押しガラス等によってランダムな拡散角で拡散させる構成においては、拡散の度合いが強いほど散乱成分が増大する。このため、反射鏡4の配光角θと、照明器具1の配光角γとの差が10度以上のように大きくなると、散乱によって照度が低下し、照明効率の低下を招く。これに対して、本実施形態の照明器具1によれば、反射鏡4の配光角θと、照明器具1の配光角γとの差が10度以上であっても、照度低下が比較的抑えられるので、照明効率の低下を抑えることができる。
In particular, the ease of design is significantly improved as compared with a configuration in which diffusion is performed at a random diffusion angle by, for example, frosted glass or embossed glass.
More specifically, when the diffusion angle of the diffusion member is random, it is difficult to correlate the degree of diffusion of the diffusion member with the light distribution angle γ. Therefore, usually, in the design of the lighting fixture 1, the diffusion member is selected by repeating the work of measuring the desired light distribution angle γ by changing the degree of diffusion of the diffusion member. On the other hand, according to the lighting fixture 1 of the present embodiment, the diffusion angle δ can be specified only by actually measuring the light distribution angle θ of the reflected light K3, and an appropriate light diffusion film 32 can be selected, so that the design work is very difficult. Will be easy.
Further, in a configuration in which diffusion is performed at a random diffusion angle using frosted glass, embossed glass, or the like, the stronger the degree of diffusion, the greater the scattering component. Therefore, when the difference between the light distribution angle θ of the reflector 4 and the light distribution angle γ of the lighting fixture 1 becomes large, such as 10 degrees or more, the illuminance decreases due to scattering, which causes a decrease in lighting efficiency. On the other hand, according to the lighting fixture 1 of the present embodiment, even if the difference between the light distribution angle θ of the reflecting mirror 4 and the light distribution angle γ of the lighting fixture 1 is 10 degrees or more, the decrease in illuminance is compared. Since it can be suppressed, it is possible to suppress a decrease in lighting efficiency.

さらに、本実施形態の照明器具1においては、照明光K1が光拡散フィルム32によって拡散制御された光なので、照明光K1の配光角γをレンズ等の光学素子で制御する構成に比べてグレアを十分に抑えることができる。したがって、人間の視界に入る高さの低天井や壁面にも照明器具1を好適に設置することができ、また、被照射面での照度ムラを抑えた照明が可能になる。 Further, in the luminaire 1 of the present embodiment, since the illuminating light K1 is the light whose diffusion is controlled by the light diffusing film 32, the glare is compared with the configuration in which the light distribution angle γ of the illuminating light K1 is controlled by an optical element such as a lens. Can be sufficiently suppressed. Therefore, the lighting fixture 1 can be suitably installed on a low ceiling or a wall surface having a height within the human field of view, and lighting with reduced illuminance unevenness on the irradiated surface becomes possible.

また本実施形態の照明器具1では、光拡散フィルム32は、前面カバーユニット6の透光板30とともに、反射面5の出射開口20の先端部22に、カシメ加工により固定されている。
これにより、透光板30の出射開口20への取付と同時に、光拡散フィルム32も取り付けることができ、作業性が高められる。
Further, in the lighting fixture 1 of the present embodiment, the light diffusing film 32 is fixed to the tip end portion 22 of the exit opening 20 of the reflecting surface 5 together with the light transmitting plate 30 of the front cover unit 6 by caulking.
As a result, the light diffusing film 32 can be attached at the same time as the light transmitting plate 30 is attached to the emission opening 20, and workability is improved.

また本実施形態の照明器具1では、照明光K1の配光角γと反射光K3の配光角θとの差が、少なくとも10度以上となっている。
これにより、フロストガラス等によってランダムな拡散角で拡散させる構成に比べ、照明器具1の設計を容易としつつ、照明効率の低下も抑えることができる。
Further, in the lighting fixture 1 of the present embodiment, the difference between the light distribution angle γ of the illumination light K1 and the light distribution angle θ of the reflected light K3 is at least 10 degrees or more.
This makes it easier to design the luminaire 1 and suppresses a decrease in lighting efficiency, as compared with a configuration in which the luminaire 1 is diffused at a random diffusion angle by frosted glass or the like.

なお、上述した実施形態は、あくまでも本発明の一態様を例示したものであって、本発明の趣旨を逸脱しない範囲で任意に変形、及び応用が可能である。 It should be noted that the above-described embodiment is merely an example of one aspect of the present invention, and can be arbitrarily modified and applied without departing from the spirit of the present invention.

(変形例1)
上述した実施形態において、LED9の熱を放熱する放熱構造を反射鏡4に設け、放熱性を高めてもよい。
(Modification 1)
In the above-described embodiment, the reflecting mirror 4 may be provided with a heat radiating structure for radiating heat from the LED 9, and the heat radiating property may be improved.

図7は、本変形例に係る照明器具100の構成を示す側面図である。図8は図7のVIII-VIII断面線から照明器具100をみた図である。図9は図7のIX-IX断面線から照明器具100をみた図である。図10は照明器具100の分解斜視図である。なお、これらの図において、上述した実施形態と同じ部材については、同一の符号を付し、その説明を省略する。 FIG. 7 is a side view showing the configuration of the lighting fixture 100 according to the present modification. FIG. 8 is a view of the luminaire 100 as viewed from the VIII-VIII cross-sectional line of FIG. 7. FIG. 9 is a view of the luminaire 100 as viewed from the IX-IX cross-sectional line of FIG. FIG. 10 is an exploded perspective view of the luminaire 100. In these figures, the same members as those in the above-described embodiment are designated by the same reference numerals, and the description thereof will be omitted.

照明器具100は、光源部2の光を制御する反射鏡ユニット150を備えている。反射鏡ユニット150は、上述した照明器具1の反射鏡4と同一の光学的機能を有するものであり、図10に示すように、反射鏡104と、複数のヒートパイプ154と、外側カバー156と、を備えている。
反射鏡104は、照明器具1が備える反射鏡4に相当する。外側カバー156は反射鏡104の外面の略全面に亘って密着し当該反射鏡104の全体を覆う高熱伝導性を有する材料から形成されたカバー部材である。
The luminaire 100 includes a reflector unit 150 that controls the light of the light source unit 2. The reflector unit 150 has the same optical function as the reflector 4 of the lighting fixture 1 described above, and as shown in FIG. 10, the reflector 104, a plurality of heat pipes 154, and an outer cover 156 , Is equipped.
The reflector 104 corresponds to the reflector 4 included in the luminaire 1. The outer cover 156 is a cover member made of a material having high thermal conductivity, which is in close contact with the outer surface of the reflecting mirror 104 over substantially the entire outer surface and covers the entire reflecting mirror 104.

ヒートパイプ154は、棒状の熱輸送手段であり、反射鏡104の外面に底部104Aから出射開口20に向けて放射状に設けられており、反射鏡104が外側カバー156で覆われることで、反射鏡104と外側カバー156とによって挟み込まれている。
さらに詳述すると、反射鏡104の外面には、底部104Aから出射開口120にかけて放射状に延びる複数の溝部160が形成されており、また外側カバー156の内面にも、底部156Aから開口端部156Bにかけて放射状に延びる複数の溝部162が、反射鏡104の溝部160に対応する位置に形成されている。そして一対の溝部160、及び162によって、図9に示すように、底部104Aから放射状に延びる管状部166が形成され、それぞれの管状部166の内部にヒートパイプ154が収められている。
ヒートパイプ154は、熱伝導性接着剤によって管状部166に隙間無く接合されており、ヒートパイプ154から反射鏡104、及び外側カバー156に熱が効率良く伝えられるようになっている。
The heat pipe 154 is a rod-shaped heat transport means, and is provided radially on the outer surface of the reflector 104 from the bottom 104A toward the exit opening 20. The reflector 104 is covered with an outer cover 156 to cover the reflector. It is sandwiched between 104 and the outer cover 156.
More specifically, the outer surface of the reflector 104 is formed with a plurality of grooves 160 extending radially from the bottom 104A to the exit opening 120, and the inner surface of the outer cover 156 is also formed from the bottom 156A to the opening end 156B. A plurality of radially extending grooves 162 are formed at positions corresponding to the grooves 160 of the reflecting mirror 104. Then, as shown in FIG. 9, the pair of groove portions 160 and 162 form a tubular portion 166 extending radially from the bottom portion 104A, and the heat pipe 154 is housed inside each tubular portion 166.
The heat pipe 154 is joined to the tubular portion 166 tightly by a heat conductive adhesive so that heat can be efficiently transferred from the heat pipe 154 to the reflector 104 and the outer cover 156.

図8に示すように、反射鏡104には、反射鏡4と同様に、底部104Aに平面部19が形成されており、この平面部19に、LED9を保持したホルダー12が載置されている。各ヒートパイプ154の一端部154Aは、ホルダー12に接続されており、各一端部154AがLED9と熱的に結合されている。
これにより、LED9の熱がホルダー12を介してヒートパイプ154の一端部154Aに伝えられ、ヒートパイプ154の熱輸送機能によって出射開口20の側の他端部154Bに伝えられる。このとき、ヒートパイプ154を通じて、反射鏡104と外側カバー156の各々に熱が伝えられ、これら反射鏡104、及び外側カバー156の全体から効率良く熱が放熱される。
As shown in FIG. 8, in the reflecting mirror 104, a flat surface portion 19 is formed on the bottom portion 104A as in the reflecting mirror 4, and a holder 12 holding the LED 9 is placed on the flat surface portion 19. .. One end 154A of each heat pipe 154 is connected to the holder 12, and each one end 154A is thermally coupled to the LED 9.
As a result, the heat of the LED 9 is transferred to the one end portion 154A of the heat pipe 154 via the holder 12, and is transferred to the other end portion 154B on the exit opening 20 side by the heat transport function of the heat pipe 154. At this time, heat is transferred to each of the reflector 104 and the outer cover 156 through the heat pipe 154, and heat is efficiently dissipated from the entire reflector 104 and the outer cover 156.

また、ホルダー12は、図8に示すように、反射鏡104、及び外側カバー156を間に挟んで、ヒートシンクとして機能するベース部14に固定されており、上述の実施形態の照明器具1と同様に、当該ベース部14とホルダー12とが熱的に接続されている。これにより、照明器具100の放熱性能が更に高められる。 Further, as shown in FIG. 8, the holder 12 is fixed to the base portion 14 functioning as a heat sink with the reflecting mirror 104 and the outer cover 156 sandwiched between them, and is the same as the lighting fixture 1 of the above-described embodiment. The base portion 14 and the holder 12 are thermally connected to each other. As a result, the heat dissipation performance of the lighting fixture 100 is further enhanced.

本変形例によれば、次のような効果を奏する。 According to this modification, the following effects are obtained.

本変形例の照明器具100では、反射鏡104に、光源たるLED9に一端部154Aが熱的に結合され、他端部154Bが出射開口20の側に延びる複数のヒートパイプ154が設けられているので、LED9の熱を反射鏡104の全体にヒートパイプ154を通じて伝え、効率良く放熱することができる。 In the luminaire 100 of this modification, the reflector 104 is provided with a plurality of heat pipes 154 in which one end 154A is thermally coupled to the LED 9 as a light source and the other end 154B extends toward the exit opening 20. Therefore, the heat of the LED 9 can be transferred to the entire reflecting mirror 104 through the heat pipe 154 and radiated efficiently.

本変形例の照明器具100では、反射鏡104には、ヒートパイプ154を収める溝部160が形成されており、ヒートパイプ154が溝部160に高熱伝導性接着剤で接合されている。
これにより、ヒートパイプ154から反射鏡104への熱伝導効率が高まり、放熱性能を高めることができる。
In the lighting fixture 100 of this modification, the reflector 104 is formed with a groove 160 for accommodating the heat pipe 154, and the heat pipe 154 is joined to the groove 160 with a high thermal conductive adhesive.
As a result, the heat conduction efficiency from the heat pipe 154 to the reflector 104 is increased, and the heat dissipation performance can be improved.

本変形例の照明器具100では、ヒートパイプ154は、反射鏡104の外面に設けられ、反射鏡104と外側カバー156とによって挟まれているので、ヒートパイプ154の脱落を防止できる。 In the lighting fixture 100 of this modification, the heat pipe 154 is provided on the outer surface of the reflector 104 and is sandwiched between the reflector 104 and the outer cover 156, so that the heat pipe 154 can be prevented from falling off.

なお、本変形例において、ヒートパイプ154を反射鏡104の反射面5に設けてもよい。この場合、外側カバー156の代わりに反射鏡104の内側に設置され、内面に反射面が設けられた内側カバー(不図示)を設けてもよい。
また、ヒートパイプ154の断面を楕円状にすることで、ヒートパイプ154と反射鏡104との接触面積を増やし、反射鏡104への熱伝導性を高めてもよい。
In this modification, the heat pipe 154 may be provided on the reflecting surface 5 of the reflecting mirror 104. In this case, instead of the outer cover 156, an inner cover (not shown) that is installed inside the reflecting mirror 104 and has a reflecting surface on the inner surface may be provided.
Further, by making the cross section of the heat pipe 154 elliptical, the contact area between the heat pipe 154 and the reflecting mirror 104 may be increased, and the thermal conductivity to the reflecting mirror 104 may be improved.

(その他の変形)
光拡散フィルム32は、いわゆる異方性拡散フィルムのように、拡散角δが方位角によって異なってもよい。
本発明は、屋内照明用の照明器具に限らず、屋外照明の照明器具にも適用できる。
(Other variants)
Like the so-called anisotropic diffusion film, the light diffusion film 32 may have a diffusion angle δ different depending on the azimuth angle.
The present invention is applicable not only to luminaires for indoor lighting but also to luminaires for outdoor lighting.

1、100 照明器具
2 光源部
4、104 反射鏡
4A、104A 底部
5 反射面
6 前面カバーユニット
9 LED(光源)
12 ホルダー
14 ベース部
16 放熱フィン
20、120 出射開口
30 透光板(板状部材)
32 光拡散フィルム(光拡散部材)
34 パッキン
150 反射鏡ユニット
154 ヒートパイプ
154A 一端部
154B 他端部
156 外側カバー
160、162 溝部
166 管状部
K1 照明光
K3 反射光
γ 配光角(第1配光角)
δ 拡散角
θ 配光角(第2配光角)
1,100 Lighting equipment 2 Light source part 4,104 Reflector 4A, 104A Bottom 5 Reflective surface 6 Front cover unit 9 LED (light source)
12 Holder 14 Base 16 Heat dissipation fins 20, 120 Emission opening 30 Translucent plate (plate-shaped member)
32 Light diffusing film (light diffusing member)
34 Packing 150 Reflector unit 154 Heat pipe 154A One end 154B Other end 156 Outer cover 160, 162 Groove 166 Tubular part K1 Illumination light K3 Reflected light γ Light distribution angle (1st light distribution angle)
δ Diffusion angle θ Light distribution angle (second light distribution angle)

Claims (4)

光源と、前記光源の光を反射する反射面と、を備え、第1配光角の照明光を出射する照明器具において、
前記反射面による反射光を一定の拡散角で拡散するシート状の光拡散部材と、
前記反射面を有した反射鏡と、
前記反射鏡の外面に密着して覆う外側カバーと、
を備え、
前記反射光が、前記第1配光角よりも小さな第2配光角を有し、
前記光拡散部材が、前記第1配光角と前記第2配光角との差に相当する前記一定の拡散角で前記反射光を拡散し、
前記反射鏡は、前記反射面の底部に前記光源が設けられ、
前記反射鏡には、前記光源に一端部が熱的に結合され、他端部が前記反射面の出射開口の側に延びる複数のヒートパイプが設けられており、
前記ヒートパイプは、前記反射鏡の外面に設けられ、当該反射鏡と前記外側カバーとによって挟まれている、
ことを特徴とする照明器具。
In a luminaire that includes a light source and a reflective surface that reflects the light of the light source and emits illumination light having a first light distribution angle.
A sheet-shaped light diffusing member that diffuses the light reflected by the reflecting surface at a constant diffusing angle, and
A reflector having the reflecting surface and
An outer cover that closely covers the outer surface of the reflector and
Equipped with
The reflected light has a second light distribution angle smaller than the first light distribution angle.
The light diffusing member diffuses the reflected light at the constant diffusing angle corresponding to the difference between the first light distribution angle and the second light distribution angle .
The reflecting mirror is provided with the light source at the bottom of the reflecting surface.
The reflecting mirror is provided with a plurality of heat pipes in which one end is thermally coupled to the light source and the other end extends toward the exit opening of the reflecting surface.
The heat pipe is provided on the outer surface of the reflector and is sandwiched between the reflector and the outer cover.
Lighting equipment that is characterized by that.
前記反射面の出射開口に設けられ、前記反射光を透過する板状の板状部材と、
を備え、
前記光拡散部材が前記板状部材とともに、前記反射面の出射開口に、カシメ加工により固定されている、
ことを特徴とする請求項1に記載の照明器具。
A plate-shaped member provided in the emission opening of the reflecting surface and transmitting the reflected light, and a plate-shaped member.
Equipped with
The light diffusing member is fixed together with the plate-shaped member to the exit opening of the reflective surface by caulking.
The lighting equipment according to claim 1.
前記反射面は、回転放物面であり、
前記光拡散部材は、前記反射面によって平行光化された前記反射光を前記一定の拡散角で拡散し、
前記第1配光角と前記第2配光角との差が、少なくとも10度以上である、
ことを特徴とする請求項1または2に記載の照明器具。
The reflective surface is a rotating paraboloid and
The light diffusing member diffuses the reflected light parallelized by the reflecting surface at the constant diffusing angle.
The difference between the first light distribution angle and the second light distribution angle is at least 10 degrees or more.
The lighting fixture according to claim 1 or 2, wherein the lighting fixture is characterized in that.
前記反射鏡には、前記ヒートパイプを収める溝部が形成されており、
前記ヒートパイプが前記溝部に高熱伝導性接着剤で接合されている、
ことを特徴とする請求項に記載の照明器具。
The reflector is formed with a groove for accommodating the heat pipe.
The heat pipe is joined to the groove with a high thermal conductive adhesive.
The lighting equipment according to claim 1 .
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