JP5884070B2 - lighting equipment - Google Patents

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JP5884070B2
JP5884070B2 JP2011276181A JP2011276181A JP5884070B2 JP 5884070 B2 JP5884070 B2 JP 5884070B2 JP 2011276181 A JP2011276181 A JP 2011276181A JP 2011276181 A JP2011276181 A JP 2011276181A JP 5884070 B2 JP5884070 B2 JP 5884070B2
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light
guide plate
light guide
light source
outer peripheral
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JP2013127854A (en
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哲也 西
哲也 西
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Panasonic Intellectual Property Management Co Ltd
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Description

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

近年、発光ダイオード（以下、ＬＥＤ）は、低電力で高輝度の発光が可能であり、表示等や照明器具等の様々な電気機器の光源として使用されている。
例えば、特許文献１の照明器具では、装置本体の前面側（下方向）に光を照射するＬＥＤ等の光源と、この光源と１８０度照射方向が異なる装置本体の後面側（上方向及び取付面側）に光を照射する光源とを備えて上下方向に光を照射可能とされる。このような構成とすることで、人の作業空間だけでなく、室内全体の明るさを向上させることが可能とされる。 In recent years, light-emitting diodes (hereinafter referred to as LEDs) are capable of emitting light with low power and high luminance, and are used as light sources for various electric devices such as displays and lighting equipment.
For example, in the luminaire of Patent Document 1, a light source such as an LED that irradiates light on the front side (downward direction) of the apparatus main body, and a rear surface side (upward direction and mounting surface) of the apparatus main body that differs in the irradiation direction by 180 degrees A light source for irradiating light on the side) and irradiating light in the vertical direction. By adopting such a configuration, it is possible to improve not only the human work space but also the brightness of the entire room.

特開２００９−２３１０２８号公報JP 2009-231028 A

ところで、上記のように複数の光源を用いた照明装置では、異なる方向に光を照射する場合には、その方向毎に光源を設けているため、部品点数の増加を招く虞がある。
本発明は、上記課題を解決するためになされたものであって、その目的は、部品点数を抑えることができる照明器具を提供することにある。 By the way, in the illuminating device using a plurality of light sources as described above, when irradiating light in different directions, a light source is provided in each direction, which may increase the number of components.
The present invention has been made to solve the above-described problems, and an object thereof is to provide a lighting apparatus capable of suppressing the number of parts.

上記課題を解決するために、本発明の照明器具は、光源と、該光源と側面が対向して配設される導光板と、前記光源と前記導光板とを内部に収容するとともに前面側に開口された前面開口部を有する有底筒状の器具本体とを備え、前記導光板に入射した光を前記器具本体の前面開口部から前面側に放出する照明器具において、前記器具本体の底面である後面側外周部には貫通孔が形成され、前記導光板の外周端部側に前記光源から入射した光の一部を前記器具本体の後面側に導光する光学制御部を設けるとともに、前記光学制御部からの光は前記貫通孔を介して前記器具本体の後面側に放出されることを特徴とする。 In order to solve the above-described problems, a lighting fixture of the present invention includes a light source, a light guide plate disposed so that a side surface of the light source is opposed to the light source, the light source and the light guide plate inside, and on the front side. and a bottomed tubular instrument body having an apertured front opening, the luminaire emits the front side light incident on the light guide plate from the front opening of the instrument body, the bottom surface of the instrument body is later on the side peripheral portion through hole is formed, provided with an optical control unit for guiding part of the light incident from the light source to the outer peripheral edge side of the light guide plate on the rear surface side of the instrument body, before The light from the optical control unit is emitted to the rear side of the instrument body through the through hole .

上記構成において、光源は、前記導光板の外周側面に対向して配設され、前記光学制御部は、前記導光板の外周端部側の前面側に設けられ、前記導光板に入射した光の一部を反射する反射面であることが好ましい。   In the above-described configuration, the light source is disposed to face the outer peripheral side surface of the light guide plate, and the optical control unit is provided on the front surface side of the outer peripheral end portion side of the light guide plate, and transmits light incident on the light guide plate. It is preferable that the reflective surface reflects a part.

上記構成において、光源は、前記導光板の外周側面に対向して配設され、前記光学制御部は、前記導光板の外周端部側の後面側に設けられ、前記導光板に入射した光の一部を透過する透過面であることが好ましい。   In the above-described configuration, the light source is disposed to face the outer peripheral side surface of the light guide plate, and the optical control unit is provided on the rear surface side of the outer peripheral end portion side of the light guide plate, and transmits light incident on the light guide plate. A transmissive surface that partially transmits is preferable.

上記構成において、導光板は、中央部が開口する環状をなし、前記光源は、前記導光板の内周側面に対向して配設され、前記光学制御部は、前記導光板の外周端部側の後面側に設けられた透過面であることが好ましい。   In the above configuration, the light guide plate has an annular shape with an opening at the center, the light source is disposed to face the inner peripheral side surface of the light guide plate, and the optical control unit is on the outer peripheral end side of the light guide plate. A transmission surface provided on the rear surface side is preferable.

本発明によれば、部品点数を抑えることができる照明器具を提供することができる。   ADVANTAGE OF THE INVENTION According to this invention, the lighting fixture which can suppress a number of parts can be provided.

（ａ）は実施形態における照明器具の斜視図であり、（ｂ）は同実施形態の照明器具の分解斜視図である。(A) is a perspective view of the lighting fixture in embodiment, (b) is an exploded perspective view of the lighting fixture of the embodiment. 同上における照明器具の断面図である。It is sectional drawing of the lighting fixture in the same as the above. （ａ）は同上における照明器具の部分拡大断面図であり、（ｂ）は光源から出射される光を模式的に示した模式図である。(A) is the partial expanded sectional view of the lighting fixture in the same as the above, (b) is the schematic diagram which showed typically the light radiate | emitted from a light source. （ａ）は別例における照明器具の斜視図であり、（ｂ）は同別例の照明器具の分解斜視図である。(A) is a perspective view of the lighting fixture in another example, (b) is an exploded perspective view of the lighting fixture of the other example. 同上における照明器具の断面図である。It is sectional drawing of the lighting fixture in the same as the above. （ａ）は同上における照明器具の部分拡大断面図であり、（ｂ）は光源から出射される光を模式的に示した模式図である。(A) is the partial expanded sectional view of the lighting fixture in the same as the above, (b) is the schematic diagram which showed typically the light radiate | emitted from a light source. （ａ）は別例における照明器具の斜視図であり、（ｂ）は同別例の照明器具の分解斜視図である。(A) is a perspective view of the lighting fixture in another example, (b) is an exploded perspective view of the lighting fixture of the other example. 同上における照明器具の断面図である。It is sectional drawing of the lighting fixture in the same as the above. （ａ）は同上における照明器具の部分拡大断面図であり、（ｂ）は光源から出射される光を模式的に示した模式図である。(A) is the partial expanded sectional view of the lighting fixture in the same as the above, (b) is the schematic diagram which showed typically the light radiate | emitted from a light source.

以下、本発明を具体化した一実施形態を図面に従って説明する。
図１及び図２に示すように、本実施形態の照明器具１０は、器具本体１１内に、光源１２と、導光板１３とを備える。 DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of the invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the lighting fixture 10 of this embodiment includes a light source 12 and a light guide plate 13 in the fixture body 11.

器具本体１１は、内部が中空の有底四角筒状をなす、その前面側に前面開口部１１ａを有し、後面側の底部１１ｂに例えば天井の引っ掛けシーリングに取り付けるための取付部（図示略）を有する。器具本体１１の底部１１ｂには、外周側に前後方向に貫通する貫通孔１１ｃが計４つ形成される。この貫通孔１１ｃは、前記底部１１ｂの中央側ほど幅狭となるような略台形形状の貫通孔である。貫通孔１１ｃには、この貫通孔１１ｃの形状に倣った形状でこの貫通孔１１ｃを閉塞する透過板１４が取り付けられる。透過板１４は、透過部材からなり、透過部材としては透明な樹脂材料（アクリルなど）やガラスなどが用いられる。   The instrument main body 11 has a hollow bottomed rectangular cylindrical shape, and has a front opening 11a on the front side thereof, and an attachment part (not shown) for attaching to a bottom ceiling 11b on the rear side, for example, a ceiling ceiling ceiling. Have A total of four through-holes 11c penetrating in the front-rear direction are formed on the outer peripheral side of the bottom 11b of the instrument body 11. The through hole 11c is a substantially trapezoidal through hole that becomes narrower toward the center of the bottom 11b. A transmission plate 14 that closes the through hole 11c is attached to the through hole 11c in a shape that follows the shape of the through hole 11c. The transmission plate 14 is made of a transmission member, and a transparent resin material (such as acrylic) or glass is used as the transmission member.

また器具本体１１は、樹脂又は金属材料で構成され、前記前面開口部１１ａを閉塞するように前記導光板１３が本体１１内部に取り付けられる。
前記光源１２は、複数のＬＥＤを並設した略棒状をなし、略正方形板状をなす導光板１３の４つの外側面１３ａのそれぞれと対向するように前記器具本体１１内部に取り付けられる。 Moreover, the instrument main body 11 is comprised with resin or a metal material, and the said light-guide plate 13 is attached inside the main body 11 so that the said front opening part 11a may be obstruct | occluded.
The light source 12 has a substantially rod shape in which a plurality of LEDs are arranged side by side, and is mounted inside the instrument body 11 so as to face each of the four outer side surfaces 13a of the light guide plate 13 having a substantially square plate shape.

導光板１３は、略正方形板状をなす透過部材からなり、透過部材としては透明な樹脂材料（アクリルなど）やガラスなどが用いられる。
導光板１３は、第１導光部２１と、第２導光部２２と、第３導光部２３とを備える。 The light guide plate 13 is made of a transmissive member having a substantially square plate shape, and a transparent resin material (such as acrylic) or glass is used as the transmissive member.
The light guide plate 13 includes a first light guide part 21, a second light guide part 22, and a third light guide part 23.

第１導光部２１は、前記光源１２と対向する外側面１３ａを含み、光源１２からの光を第２導光部２２側に光Ｈ０を導光する。導光板１３の入射面である外側面１３ａは、光の取り込み効率を上げる処理（形状や表面反射低減など）が施されることが好ましい。   The first light guide unit 21 includes an outer surface 13a facing the light source 12, and guides light from the light source 12 to the second light guide unit 22 side as light H0. The outer surface 13a, which is the incident surface of the light guide plate 13, is preferably subjected to a process (such as reduction in shape and surface reflection) for increasing the light capturing efficiency.

第２導光部２２は、第１導光部２１の厚さＬ１から徐々に厚さが薄くなるような形状の傾斜面２２ａを器具本体１１の後面側に有し、傾斜面２２ａから一部の光Ｈ１が後面側の本体１１の貫通孔１１ｃ側に導光され、残りの光を第３導光部２３側に導光する。なお、本実施形態では傾斜面２２ａが光学制御部及び透過面として機能する。   The second light guide unit 22 has an inclined surface 22a having a shape that gradually decreases from the thickness L1 of the first light guide unit 21 on the rear surface side of the instrument body 11, and a part from the inclined surface 22a. Light H1 is guided to the through hole 11c side of the main body 11 on the rear surface side, and the remaining light is guided to the third light guide unit 23 side. In the present embodiment, the inclined surface 22a functions as an optical control unit and a transmission surface.

第３導光部２３は、前記第１導光部２１の厚さＬ１よりも薄い、厚さＬ２を有し、後面に光を拡散反射する反射面２３ａ、前面に光を出射する出射面２３ｂを備える。反射面２３ａは、例えばくさび形状プリズムや白色インクによる反射ドットなどの処理が施されている。また出射面２３ｂは、拡散処理として、別部材の拡散シートを貼ったり、その表面を凹凸形状としたりしてよい。   The third light guide 23 has a thickness L2 that is thinner than the thickness L1 of the first light guide 21, and has a reflective surface 23a that diffuses and reflects light on the rear surface, and an output surface 23b that emits light on the front surface. Is provided. The reflection surface 23a is subjected to processing such as a wedge-shaped prism or a reflection dot using white ink. In addition, the exit surface 23b may be a diffusion sheet that is a separate member or may have an uneven surface as a diffusion treatment.

次に、本実施形態の照明器具１０の作用について説明する。
上記のように構成された照明器具１０では、図３及び図４に示すように、前記光源１２から光Ｈ０が出射されると、導光板１３にて導光されて主に第３導光部２３の出射面２３ｂから出射されて主に人の作業空間に光を照らす。そして、一部の光Ｈ１が第２導光部２２の傾斜面２２ａから出射される。傾斜面２２ａから出射された光Ｈ１は、器具１０の取り付け面側である後面側に出射され、その光は前記器具本体１１の貫通孔１１ｃの内側面１１ｄにて反射されて光透過部としての透過板１４を介して器具１０の外部に光が放出される。このため、照明器具１０の前面側方向に位置する作業空間を照明するための光源１２のみで、人の作業空間だけでなく、照明器具１０の取り付け面を照らして室内全体を光で照らすことができる。 Next, the effect | action of the lighting fixture 10 of this embodiment is demonstrated.
In the lighting fixture 10 configured as described above, as shown in FIGS. 3 and 4, when the light H <b> 0 is emitted from the light source 12, the light is guided by the light guide plate 13 and mainly the third light guide unit. The light is emitted from the light exit surface 23b of the light 23 to illuminate light mainly on the human work space. A part of the light H <b> 1 is emitted from the inclined surface 22 a of the second light guide unit 22. The light H1 emitted from the inclined surface 22a is emitted to the rear surface side that is the attachment surface side of the instrument 10, and the light is reflected by the inner side surface 11d of the through hole 11c of the instrument body 11 to serve as a light transmission part. Light is emitted to the outside of the instrument 10 through the transmission plate 14. For this reason, only the light source 12 for illuminating the work space located in the front side direction of the luminaire 10 can illuminate not only the human work space but also the mounting surface of the luminaire 10 with the entire room. it can.

次に、本実施形態の特徴的な効果を記載する。
（１）導光板１３の外周端部側に光源１２から入射した光Ｈ０の一部（光Ｈ１）を器具本体１１の後面側に導光する光学制御部及び透過面としての傾斜面２２ａを設ける。そして、器具本体１１の後面側外周部に傾斜面２２ａからの光を器具本体の後面側に放出する光透過部としての透過板１４を設ける。このような構成とすることで、光源１２からの光の一部（光Ｈ１）が第２導光部２２の傾斜面２２ａから出射される。傾斜面２２ａから出射された光Ｈ１は、器具１０の取り付け面側である後面側に出射され、その光は前記器具本体１１の貫通孔１１ｃの内側面１１ｄにて反射されて光透過部としての透過板１４を介して器具１０の外部に光が放出される。このため、人の作業空間だけでなく、取り付け面を照らして室内全体を光で照らすことができる。また、各照射方向に対して光源１２を設ける必要がなくなるため、部品点数の増加を抑えることができる。 Next, characteristic effects of the present embodiment will be described.
(1) An optical control unit that guides part of the light H0 incident from the light source 12 (light H1) to the rear surface side of the instrument body 11 and an inclined surface 22a as a transmission surface are provided on the outer peripheral end side of the light guide plate 13. . And the transmission board 14 as a light transmissive part which discharge | releases the light from the inclined surface 22a to the rear surface side of an instrument main body is provided in the rear surface side outer peripheral part of the instrument main body 11. FIG. With such a configuration, part of the light (light H <b> 1) from the light source 12 is emitted from the inclined surface 22 a of the second light guide unit 22. The light H1 emitted from the inclined surface 22a is emitted to the rear surface side that is the attachment surface side of the instrument 10, and the light is reflected by the inner side surface 11d of the through hole 11c of the instrument body 11 to serve as a light transmission part. Light is emitted to the outside of the instrument 10 through the transmission plate 14. For this reason, it is possible to illuminate not only the human work space but also the entire interior with light by illuminating the mounting surface. Moreover, since it is not necessary to provide the light source 12 with respect to each irradiation direction, an increase in the number of parts can be suppressed.

尚、本発明の実施形態は、以下のように変更してもよい。
・上記実施形態では、光源１２を構成するＬＥＤを棒状（直線状）に配置する構成としたが、これに限らず、例えば円環状に配置する構成を採用しても
・上記実施形態では、光源１２としてＬＥＤを用いる構成としたが、例えば冷陰極蛍光灯を用いる構成を採用してもよい。 In addition, you may change embodiment of this invention as follows.
In the above embodiment, the LEDs constituting the light source 12 are arranged in a rod shape (straight shape). However, the present invention is not limited to this. For example, a configuration in which the LEDs are arranged in an annular shape is adopted. However, for example, a configuration using a cold cathode fluorescent lamp may be adopted.

・上記実施形態では、器具本体１１を有底四角筒状に構成したが、これに限らず、例えば図４（ａ）（ｂ）に示すように、有底円筒状となるように器具本体３１を構成してもよい。ここで、図４（ａ）（ｂ）では、器具本体３１を略有底円筒状とすることで、器具本体３１の内周面に沿って環状に形成される光源３２と、図４（ａ）（ｂ）に示すように前記光源３２と対向するとともに円盤状に形成される導光板３３とを備える。また、貫通孔３１ａについても同様に、器具本体３１の外縁に沿うような湾曲形状となるように形成する。そして、この貫通孔３１ａを閉塞するように透過板３４を湾曲形状としている。   -In above-mentioned embodiment, although the instrument main body 11 was comprised in the bottomed square cylinder shape, it is not restricted to this, For example, as shown to Fig.4 (a) (b), the instrument main body 31 so that it may become a bottomed cylindrical shape. May be configured. Here, in FIGS. 4A and 4B, the light source 32 formed in an annular shape along the inner peripheral surface of the tool main body 31 by forming the tool main body 31 into a substantially bottomed cylindrical shape, and FIG. As shown in (b), a light guide plate 33 is provided which faces the light source 32 and is formed in a disc shape. Similarly, the through hole 31 a is formed to have a curved shape along the outer edge of the instrument body 31. And the permeation | transmission board 34 is made into the curved shape so that this through-hole 31a may be obstruct | occluded.

また、上記実施形態では、光学制御部として、導光板１３の後面側に形成される傾斜面２２ａを採用したが図５及び図６に示すように、導光板３３の第２導光部２２の前面側を傾斜面として、導光板４３内の光の一部（光Ｈ１）を後面側に反射する反射面３３ａを備えた構成としてもよい。この反射面３３ａは鏡面反射する処理（金属膜蒸着、金属箔テープ貼付など）が施されている。なお、本構成では、反射面３３ａが光学制御部として機能する。   Moreover, in the said embodiment, although the inclined surface 22a formed in the rear surface side of the light-guide plate 13 was employ | adopted as an optical control part, as shown in FIG.5 and FIG.6, the 2nd light-guide part 22 of the light-guide plate 33 is used. It is good also as a structure provided with the reflective surface 33a which makes a front surface side an inclined surface and reflects a part of light (light H1) in the light-guide plate 43 to a back surface side. The reflection surface 33a is subjected to a mirror reflection process (metal film deposition, metal foil tape application, etc.). In this configuration, the reflecting surface 33a functions as an optical control unit.

このように、導光板３３の外周端部側の前面側に設けられ、導光板３３に入射した光の一部を反射する反射面３３ａを光学制御部として採用しても上記実施形態の効果（１）と同様の効果を奏することができる。   As described above, even if the reflection surface 33a provided on the front surface side on the outer peripheral end side of the light guide plate 33 and reflecting a part of the light incident on the light guide plate 33 is employed as the optical control unit, the effect of the above embodiment ( The same effect as 1) can be achieved.

・上記実施形態では、光源１２を器具本体１１の外周側に配置する構成としたが、これに限らない。例えば、図８及び図９に示すように器具本体１１の中央部側に光源４２を配置する構成を採用してもよい。   In the above embodiment, the light source 12 is arranged on the outer peripheral side of the instrument main body 11, but is not limited thereto. For example, as shown in FIGS. 8 and 9, a configuration in which the light source 42 is disposed on the center side of the instrument body 11 may be employed.

ここで、器具本体１１の中央部側に光源４２を配置した構成について図７〜図９を用いて説明する。
本構成では、上記実施形態と同様に器具本体４１は、略有底四角筒状となるように形成される。器具本体４１の後面側である底部４１ａは、外周側の第１底部４１ｂと、この第１底部４１ｂよりも後側に突出する内周側の第２底部４１ｃとを備え、これら底部４１ｂ，４１ｃがテーパ形状の接続部４１ｄにて連続するように形成される。接続部４１ｄには、前後方向に貫通する貫通孔４１ｅが形成され、この貫通孔４１ｅには、貫通孔４１ｅの形状に倣った光透過部としての透過板４４が形成される、また、器具本体４１には器具本体４１の底部４１ａの形状に倣った導光板４３が設けられる。この導光板４３は、その中央部が開口された環状をなし、導光板４３にはその内周面４３ａと対向するように前記光源４２が設けられる。なお、本構成では前記内周面４３ａが上記実施形態の第１導光部２１の外側面１３ａと同様に光源４２の光を受ける部位である。また、導光板４３は、前記透過板４４と対向するように傾斜面４３ｂを有する。この傾斜面４３ｂは、導光板４３の外周方向に向かって厚みが薄くなるように形成され、光源４２からの光の一部がこの傾斜面４３ｂから出射されて透過板４４を介して器具本体４１外部に放出するようになっている。なお、本構成では、傾斜面４３ｂが光学制御部及び透過面として機能する。このような構成であっても、上記実施形態の効果（１）と同様の効果を奏することができる。 Here, the structure which has arrange | positioned the light source 42 to the center part side of the instrument main body 11 is demonstrated using FIGS.
In this configuration, the instrument main body 41 is formed to have a substantially bottomed rectangular tube shape as in the above embodiment. The bottom portion 41a, which is the rear surface side of the instrument body 41, includes a first bottom portion 41b on the outer peripheral side and a second bottom portion 41c on the inner peripheral side that projects rearward from the first bottom portion 41b, and these bottom portions 41b and 41c are provided. Is formed so as to be continuous at the connecting portion 41d having a tapered shape. The connecting portion 41d is formed with a through hole 41e penetrating in the front-rear direction. The through hole 41e is formed with a transmission plate 44 as a light transmitting portion following the shape of the through hole 41e. 41 is provided with a light guide plate 43 that follows the shape of the bottom 41 a of the instrument body 41. The light guide plate 43 has an annular shape with an opening at the center thereof, and the light source 42 is provided on the light guide plate 43 so as to face the inner peripheral surface 43a. In the present configuration, the inner peripheral surface 43a is a portion that receives light from the light source 42, similarly to the outer surface 13a of the first light guide portion 21 of the above embodiment. In addition, the light guide plate 43 has an inclined surface 43 b so as to face the transmission plate 44. The inclined surface 43 b is formed so that the thickness decreases toward the outer peripheral direction of the light guide plate 43, and a part of the light from the light source 42 is emitted from the inclined surface 43 b and passes through the transmission plate 44 to the instrument body 41. Released to the outside. In this configuration, the inclined surface 43b functions as an optical control unit and a transmission surface. Even with this configuration, the same effect as the effect (1) of the above embodiment can be obtained.

・上記実施形態並びに上記構成（別例）では、透過板１４，３４，４４にて光透過部を構成したが、透過板１４，３４，４４を省略して貫通孔１１ｃ，３１ａ，４１ｅを光透過部として採用する構成を採用してもよい。   In the above-described embodiment and the above-described configuration (another example), the light transmission part is configured by the transmission plates 14, 34, 44. However, the transmission plates 14, 34, 44 are omitted and the through holes 11 c, 31 a, 41 e are transmitted through the light. You may employ | adopt the structure employ | adopted as a permeation | transmission part.

１０…照明器具、１１，３１，４１…器具本体、１１ａ…前面開口部、１２，３２，４２…光源、１３，３３，４３…導光板、１４，３４，４４…透過板（光透過部）、２２ａ…傾斜面（光学制御部及び透過面）、３３ａ…反射面（光学制御部）、４３ｂ…傾斜面（光学制御部及び透過面）、Ｈ０，Ｈ１…光。   DESCRIPTION OF SYMBOLS 10 ... Lighting fixture, 11, 31, 41 ... Appliance main body, 11a ... Front opening part, 12, 32, 42 ... Light source, 13, 33, 43 ... Light guide plate, 14, 34, 44 ... Transmission plate (light transmission part) , 22a ... inclined surface (optical control unit and transmission surface), 33a ... reflection surface (optical control unit), 43b ... inclined surface (optical control unit and transmission surface), H0, H1 ... light.

Claims (4)

光源と、該光源と側面が対向して配設される導光板と、前記光源と前記導光板とを内部に収容するとともに前面側に開口された前面開口部を有する有底筒状の器具本体とを備え、
前記導光板に入射した光を前記器具本体の前面開口部から前面側に放出する照明器具において、
前記器具本体の底面である後面側外周部には貫通孔が形成され、
前記導光板の外周端部側に前記光源から入射した光の一部を前記器具本体の後面側に導光する光学制御部を設けるとともに、前記光学制御部からの光は前記貫通孔を介して前記器具本体の後面側に放出されることを特徴とする照明器具。 Light source, the light source and a light guide plate side is disposed opposite, a bottomed cylindrical device body having a front opening which is opened to the front side accommodates a light guide plate and the light source in the interior And
In the lighting fixture that emits light incident on the light guide plate from the front opening of the fixture body to the front side,
A through hole is formed in the outer peripheral portion of the rear surface which is the bottom surface of the instrument body,
Provided with an optical control unit for guiding part of the light incident from the light source to the outer peripheral edge side of the light guide plate on the rear surface side of the instrument body, the light from the front Symbol optical control unit through the through hole The lighting fixture is discharged to the rear side of the fixture body. 請求項１に記載の照明器具において、
前記光源は、前記導光板の外周側面に対向して配設され、
前記光学制御部は、前記導光板の外周端部側の前面側に設けられ、前記導光板に入射した光の一部を反射する反射面であることを特徴とする照明器具。 The lighting fixture according to claim 1,
The light source is disposed to face the outer peripheral side surface of the light guide plate,
The lighting apparatus according to claim 1, wherein the optical control unit is a reflective surface that is provided on a front surface side of the light guide plate on an outer peripheral end portion side and reflects a part of light incident on the light guide plate. 請求項１に記載の照明器具において、
前記光源は、前記導光板の外周側面に対向して配設され、
前記光学制御部は、前記導光板の外周端部側の後面側に設けられ、前記導光板に入射した光の一部を透過する透過面であることを特徴とする照明器具。 The lighting fixture according to claim 1,
The light source is disposed to face the outer peripheral side surface of the light guide plate,
The lighting apparatus according to claim 1, wherein the optical control unit is a transmission surface that is provided on a rear surface side of the outer peripheral end portion side of the light guide plate and transmits a part of light incident on the light guide plate. 請求項１に記載の照明器具において、
前記導光板は、中央部が開口する環状をなし、
前記光源は、前記導光板の内周側面に対向して配設され、
前記光学制御部は、前記導光板の外周端部側の後面側に設けられた透過面であることを特徴とする照明器具。 The lighting fixture according to claim 1,
The light guide plate has an annular shape with an open center,
The light source is disposed to face the inner peripheral side surface of the light guide plate,
The lighting apparatus according to claim 1, wherein the optical control unit is a transmission surface provided on a rear surface side of the outer peripheral end portion side of the light guide plate.
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