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JP6025041B2 - Lighting device - Google Patents

Lighting device Download PDF

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Publication number
JP6025041B2
JP6025041B2 JP2012243576A JP2012243576A JP6025041B2 JP 6025041 B2 JP6025041 B2 JP 6025041B2 JP 2012243576 A JP2012243576 A JP 2012243576A JP 2012243576 A JP2012243576 A JP 2012243576A JP 6025041 B2 JP6025041 B2 JP 6025041B2
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Japan
Prior art keywords
light
guide plate
ceiling
light emitting
light guide
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JP2012243576A
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Japanese (ja)
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JP2014093216A (en
Inventor
一郎 谷村
一郎 谷村
明子 太田
明子 太田
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Panasonic Intellectual Property Management Co Ltd
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Panasonic Intellectual Property Management Co Ltd
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Publication date
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Priority to JP2012243576A priority Critical patent/JP6025041B2/en
Priority to DE112013005283.0T priority patent/DE112013005283T8/en
Priority to CN201390000690.XU priority patent/CN204534162U/en
Priority to PCT/JP2013/006329 priority patent/WO2014068932A1/en
Publication of JP2014093216A publication Critical patent/JP2014093216A/en
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Publication of JP6025041B2 publication Critical patent/JP6025041B2/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/02—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters
    • F21S8/026—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters intended to be recessed in a ceiling or like overhead structure, e.g. suspended ceiling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/0008—Reflectors for light sources providing for indirect lighting
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • F21Y2103/30—Elongate light sources, e.g. fluorescent tubes curved
    • F21Y2103/33—Elongate light sources, e.g. fluorescent tubes curved annular
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Description

本発明は、ＬＥＤ（Ｌｉｇｈｔ Ｅｍｉｔｔｉｎｇ Ｄｉｏｄｅ）等の発光素子を光源として備える照明装置に関し、特に、導光板を用いて面発光する直下型方式の照明装置に関する。   The present invention relates to an illuminating device including a light emitting element such as an LED (Light Emitting Diode) as a light source, and more particularly to a direct type illuminating device that emits light by using a light guide plate.

ＬＥＤ等の発光素子を導光板の裏側に設け、面発光する直下型方式の照明装置が知られている（例えば、特許文献１、特許文献２参照）。
具体的には、発光素子は、主出射方向を導光板に向けた状態で、導光板の裏側に配置される。発光素子から出射された光は、発光素子に対向する導光板の入射面から入射し、導光板の出射面から出射される。これにより、点光源である発光素子から出射された光を用いて、面発光を実現することができる。 2. Description of the Related Art A direct type lighting device that emits a surface by providing a light emitting element such as an LED on the back side of a light guide plate is known (for example, see Patent Document 1 and Patent Document 2).
Specifically, the light emitting element is disposed on the back side of the light guide plate with the main emission direction facing the light guide plate. The light emitted from the light emitting element enters from the incident surface of the light guide plate facing the light emitting element, and is emitted from the output surface of the light guide plate. Thereby, surface light emission is realizable using the light radiate | emitted from the light emitting element which is a point light source.

このような直下型方式の照明装置は、発光素子を導光板の裏側に配置するので、発光素子を導光板の側面側に設けるエッジライト方式と比較して、照明装置表側の発光部分をより多く確保できるといった特長がある。   In such a direct type illumination device, the light emitting element is disposed on the back side of the light guide plate, and therefore, more light emitting portions are provided on the front side of the illumination device than the edge light method in which the light emitting element is provided on the side surface side of the light guide plate. There is a feature that can be secured.

特開２００１−１０８９８７号公報JP 2001-108987 A 特開２００８−１１２７３９号公報JP 2008-112739 A

しかしながら、直下型方式の照明装置は、導光板の裏側に発光素子を配置する必要があり、エッジライト方式の照明装置と比較して、照明装置の厚みが大きくなってしまう。このような直下型方式の照明装置を天井に取り着けた場合、天井面からの突出量が大きくなり、部屋内の美観が損なわれるおそれがある。
本発明は、上記の事情に鑑みなされたものであり、照明装置を天井に取り着けた状態において、発光素子と導光板との両方が縦配置で天井面より下側に配置されるため、天井面からの突出量が少なく、部屋内の美観を損ないにくい照明装置を提供することを目的とする。 However, the direct type illumination device needs to arrange a light emitting element on the back side of the light guide plate, and the illumination device is thicker than the edge light illumination device. When such a direct lighting system is mounted on the ceiling, the amount of protrusion from the ceiling surface increases, and the aesthetics of the room may be impaired.
The present invention has been made in view of the above circumstances, and in a state where the lighting device is attached to the ceiling, both the light emitting element and the light guide plate are arranged vertically and below the ceiling surface. An object of the present invention is to provide an illumination device that has a small amount of protrusion from the surface and hardly impairs the beauty of the room.

上記目的を達成するため、本発明の一態様である照明装置は、少なくとも１つの発光素子と、導光板と、それらを収容する筐体とを備え、天井に形成された埋込穴を利用して取り着けられる照明装置であって、前記筐体の天井面に対面する側の面板の一部に、筐体が天井に取着された状態において前記埋込穴に没入する冠状部が設けられ、前記冠状部の内部空間に、前記発光素子が配置され、発光素子を覆う状態で前記導光板が、前記筐体のうちの残部の少なくとも一部に配置されていることを特徴とする。   In order to achieve the above object, a lighting device according to one embodiment of the present invention includes at least one light-emitting element, a light guide plate, and a housing that accommodates them, and uses an embedded hole formed in a ceiling. In the lighting device to be attached, a part of the face plate facing the ceiling surface of the housing is provided with a crown-shaped portion that immerses in the embedded hole in a state where the housing is attached to the ceiling. The light emitting element is disposed in an internal space of the crown-shaped portion, and the light guide plate is disposed in at least a part of the remaining portion of the casing in a state of covering the light emitting element.

本発明の一態様である照明装置によれば、筐体の天井面に対面する側の面板の一部に、筐体が天井に取着された状態において埋込穴に没入する冠状部が設けられ、その冠状部の内部空間に発光素子が配置されるので、天井面からの突出量を少なくすることができる。天井面からの突出量が少なく、部屋内の住人にとって目立ちにくいので、照明装置の設置により部屋内の美観が損なわれるおそれは低い。一方、発光素子を覆う状態で導光板が、筐体のうちの残部の少なくとも一部に配置されているので、照明装置として十分な明るさを確保することができる。   According to the lighting device of one embodiment of the present invention, a crown-shaped portion that is inserted into the embedding hole in a state where the housing is attached to the ceiling is provided on a part of the face plate facing the ceiling surface of the housing. In addition, since the light emitting element is disposed in the internal space of the crown portion, the amount of protrusion from the ceiling surface can be reduced. Since the amount of protrusion from the ceiling surface is small and it is difficult for the residents in the room to stand out, it is unlikely that the aesthetics in the room will be impaired by the installation of the lighting device. On the other hand, since the light guide plate is disposed in at least a part of the remaining portion of the housing in a state of covering the light emitting element, sufficient brightness as the lighting device can be ensured.

実施の形態１にかかる照明装置の天井板への取り着けの態様を説明する図である。It is a figure explaining the aspect of the attachment to the ceiling board of the illuminating device concerning Embodiment 1. FIG. 実施の形態１にかかる照明装置を示す斜視図である。1 is a perspective view showing a lighting device according to a first embodiment. 実施の形態１にかかる照明装置を示す分解斜視図である。1 is an exploded perspective view showing a lighting device according to Embodiment 1. FIG. 実施の形態１にかかる筐体を示す断面図である。1 is a cross-sectional view showing a housing according to a first embodiment. 実施の形態１にかかる照明装置を示す断面図である。1 is a cross-sectional view illustrating a lighting device according to a first embodiment. 図５に示す実施の形態１にかかる照明装置の右端部の拡大断面図である。It is an expanded sectional view of the right end part of the illuminating device concerning Embodiment 1 shown in FIG. 実施の形態２にかかる照明装置を示す分解斜視図である。It is a disassembled perspective view which shows the illuminating device concerning Embodiment 2. FIG. 実施の形態２にかかる照明装置を示す断面図である。It is sectional drawing which shows the illuminating device concerning Embodiment 2. FIG.

以下、本発明の一態様にかかる照明装置について、図面を参照しながら説明する。なお、各図面における部材の縮尺は実際のものとは異なる。また、以下では、照明装置の照明方向側を表側とし、表側の反対側を裏側として説明を行なう。
≪実施の形態１≫
［全体構成］
まず始めに、実施の形態１にかかる照明装置の全体構成について説明する。 Hereinafter, an illumination device according to one embodiment of the present invention will be described with reference to the drawings. In addition, the scale of the member in each drawing differs from an actual thing. In the following description, the illumination direction side of the illumination device is the front side, and the opposite side of the front side is the back side.
<< Embodiment 1 >>
[overall structure]
First, the overall configuration of the lighting apparatus according to the first embodiment will be described.

図１は、実施の形態１にかかる照明装置の天井板への取り着けの態様を説明する図である。図１に示すように、本発明の一態様にかかる照明装置１は、天井に形成された埋込穴を利用して取り着けられる照明装置である。
図１に示す例では、天井板２に設けた埋込穴２ａに筐体１０の一部が埋め込まれている。筐体１０の裏面には、照明装置１内の発光素子等から発生した熱を装置外部へ放熱するための放熱部材３が設けられ、その放熱部材３の側面には板ばね状の封止部材４が取り着けられている。照明装置１は、この封止部材４を、天井板２の天井裏面２ｂに掛止させることによって、天井板２に取り着けられている。 FIG. 1 is a diagram for explaining a manner in which the lighting device according to the first embodiment is attached to a ceiling board. As shown in FIG. 1, the illuminating device 1 concerning 1 aspect of this invention is an illuminating device attached using the embedding hole formed in the ceiling.
In the example shown in FIG. 1, a part of the housing 10 is embedded in the embedded hole 2 a provided in the ceiling plate 2. A heat radiating member 3 for radiating heat generated from a light emitting element or the like in the lighting device 1 to the outside of the device is provided on the back surface of the housing 10, and a leaf spring-shaped sealing member is provided on the side surface of the heat radiating member 3. 4 is attached. The lighting device 1 is attached to the ceiling plate 2 by hooking the sealing member 4 to the ceiling back surface 2 b of the ceiling plate 2.

なお、掛止部材４は板ばね状のものに限定されない。また、照明装置１の天井板２への取り着け方法は掛止部材４を用いた掛止によるものに限定されず、ねじ止めや接着等で取り着けられていてもよい。
天井板２の天井裏面２ｂには、照明装置１を点灯させるための回路ユニット５が配置されており、照明装置１は、電源線２３を介して回路ユニット５と電気的に接続されている。回路ユニット５は、外部の商用交流電源（不図示）と電気的に接続されており、商用交流電源から入力される電流を照明装置１に供給する。なお、本実施の形態では、回路ユニット５が照明装置１とは別途に必要であるが、本発明にかかる照明装置は回路ユニット５を内蔵した照明装置であってもよい。 The latch member 4 is not limited to a leaf spring shape. Moreover, the attachment method to the ceiling board 2 of the illuminating device 1 is not limited to the thing by the latching using the latching member 4, You may attach by screwing, adhesion | attachment, etc.
A circuit unit 5 for lighting the lighting device 1 is disposed on the ceiling back surface 2 b of the ceiling plate 2, and the lighting device 1 is electrically connected to the circuit unit 5 via a power line 23. The circuit unit 5 is electrically connected to an external commercial AC power supply (not shown), and supplies a current input from the commercial AC power supply to the lighting device 1. In the present embodiment, the circuit unit 5 is required separately from the lighting device 1, but the lighting device according to the present invention may be a lighting device incorporating the circuit unit 5.

以上が、実施の形態１にかかる照明装置の全体構成についての説明である。続いて、実施の形態１にかかる照明装置の各構成について説明する。
［照明装置の各構成］
図２は、実施の形態１にかかる照明装置を示す斜視図である。図３は、実施の形態１にかかる照明装置を示す分解斜視図である。図４は、実施の形態１にかかる筐体を示す断面図である。図５は、実施の形態１にかかる照明装置を示す断面図である。図６は、図５に示す実施の形態１にかかる照明装置の右端部の拡大断面図である。図２〜図６に示すように、照明装置１は、筐体１０、発光モジュール２０、反射部材３０、導光板４０、拡散カバー５０、および放熱部材３を備える。 The above is the description of the overall configuration of the lighting apparatus according to the first embodiment. Then, each structure of the illuminating device concerning Embodiment 1 is demonstrated.
[Configurations of lighting device]
FIG. 2 is a perspective view of the lighting device according to the first embodiment. FIG. 3 is an exploded perspective view showing the lighting apparatus according to the first embodiment. FIG. 4 is a cross-sectional view illustrating the housing according to the first embodiment. FIG. 5 is a cross-sectional view illustrating the lighting apparatus according to the first embodiment. 6 is an enlarged cross-sectional view of the right end portion of the lighting apparatus according to the first embodiment shown in FIG. As shown in FIGS. 2 to 6, the lighting device 1 includes a housing 10, a light emitting module 20, a reflecting member 30, a light guide plate 40, a diffusion cover 50, and a heat radiating member 3.

（筐体）
図３と図４に示すように、筐体１０は、例えば、アルミダイキャスト製の筐体であって、円環板状の本体部１２と、当該本体部１２の天井面に対面する側の面板１６の中央部に設けられた冠状部１１とを有する。
冠状部１１は、円板状の天板部分１３と天板部分１３の外周縁に延設された円筒状の側壁部分１４とを有し、図４に示すように、その内部に空間１８を有する。図４、図５、および図６において、符号Ｈ１１で示す範囲が天井面に対して垂直方向の冠状部１１の範囲であり、符号Ｗ１１で示す範囲が天井面に対して水平方向の冠状部１１の範囲である。また、符号Ｈ２ａで示す範囲が天井面に対して垂直方向の埋込穴２ａの範囲であり、符号Ｗ２ａで示す範囲が天井面に対して水平方向の埋込穴２ａの範囲である。このように、冠状部１１は、筐体１０が天井に取り着けられた状態において、埋込穴２ａに没入している。 (Casing)
As shown in FIG. 3 and FIG. 4, the housing 10 is, for example, a housing made of aluminum die-cast, and has a ring-shaped main body 12 and a side facing the ceiling surface of the main body 12. The crown plate 11 is provided at the center of the face plate 16.
The crown portion 11 has a disk-shaped top plate portion 13 and a cylindrical side wall portion 14 extending on the outer peripheral edge of the top plate portion 13, and as shown in FIG. Have. 4, 5, and 6, the range indicated by reference sign H <b> 11 is the range of the coronal part 11 perpendicular to the ceiling surface, and the range indicated by reference sign W <b> 11 is the coronal part 11 parallel to the ceiling surface. Range. Further, the range indicated by reference sign H2a is the range of the embedded hole 2a perpendicular to the ceiling surface, and the range indicated by reference sign W2a is the range of the embedded hole 2a horizontal to the ceiling surface. Thus, the crown-shaped part 11 is immersed in the embedding hole 2a in a state where the casing 10 is attached to the ceiling.

冠状部１１内の空間１８には、発光モジュール２０、反射部材３０の一部および導光板４０の一部が収容されている。具体的には、冠状部１１内の空間１８には、発光素子２２が配置された発光モジュール２０、反射部材３０の一部分、導光板４０の素子列対向部分４４、ならびに導光板４０の第１光散乱部分４５、第２光散乱部分４６、第３光散乱部分４７、および第４光散乱部分４８の一部分が収容されている。   In the space 18 in the crown portion 11, the light emitting module 20, a part of the reflecting member 30 and a part of the light guide plate 40 are accommodated. Specifically, in the space 18 in the crown 11, the light emitting module 20 in which the light emitting element 22 is disposed, a part of the reflecting member 30, the element row facing portion 44 of the light guide plate 40, and the first light of the light guide plate 40. A portion of the scattering portion 45, the second light scattering portion 46, the third light scattering portion 47, and the fourth light scattering portion 48 is accommodated.

すなわち、照明装置１が天井に取り着けられた状態において、発光素子２２を備える発光モジュール２０、反射部材３０の一部分、導光板４０の素子列対向部分４４、ならびに導光板４０の第１光散乱部分４５、第２光散乱部分４６、第３光散乱部分４７、および第４光散乱部分４８の一部分は、天井面より上側の埋込穴２ａ内に位置する。
本体部１２は、筐体１０において冠状部１１以外の残りの部分（残部）である。本体部１２は、天井板２に当接される円環板状の面板１６と、当該面板１６の外周縁に延設されたフランジ部分１７とを有し、図４に示すように、その内部に空間１９を有する。図４、図５、および図６において、符号Ｈ１２で示す範囲が天井面に対して垂直方向の本体部１２の範囲であり、符号Ｗ１２で示す範囲が天井面に対して水平方向の本体部１２の範囲である。また、符号Ｗ１２ａで示す範囲が本体部１２の外周縁部１２ａである。このように、本体部１２は、筐体１０が天井に取り着けられた状態において、天井面から露出している。また、本体部１２の外周縁部１２ａは、筐体１０が天井に取り着けられた状態において、埋込穴２ａよりも外側へ張り出している。 That is, in a state where the lighting device 1 is mounted on the ceiling, the light emitting module 20 including the light emitting element 22, a part of the reflecting member 30, the element row facing portion 44 of the light guide plate 40, and the first light scattering portion of the light guide plate 40. 45, the second light scattering portion 46, the third light scattering portion 47, and a portion of the fourth light scattering portion 48 are located in the embedded hole 2a above the ceiling surface.
The main body portion 12 is a remaining portion (remaining portion) other than the coronal portion 11 in the housing 10. The main body 12 includes an annular plate-like face plate 16 that is in contact with the ceiling plate 2 and a flange portion 17 that extends to the outer peripheral edge of the face plate 16. As shown in FIG. Has a space 19. 4, 5, and 6, the range indicated by reference sign H <b> 12 is the range of the main body portion 12 perpendicular to the ceiling surface, and the range indicated by reference sign W <b> 12 is the main body portion 12 horizontal to the ceiling surface. Range. Further, the range indicated by reference sign W12a is the outer peripheral edge portion 12a of the main body portion 12. As described above, the main body 12 is exposed from the ceiling surface in a state where the housing 10 is attached to the ceiling. Further, the outer peripheral edge portion 12a of the main body portion 12 projects outward from the embedding hole 2a when the housing 10 is attached to the ceiling.

本体部１２内の空間１９には、反射部材３０の一部と導光板４０の一部とが収容されている。具体的には、本体部１２内の空間１９には、反射部材３０の一部分、環内側部４２、環外側部４３、ならびに第１光散乱部分４５、第２光散乱部分４６、第３光散乱部分４７、および第４光散乱部分４８の一部分が収容されている。
すなわち、照明装置１が天井に取り付けられた状態において、反射部材３０の一部分、環内側部４２、環外側部４３、ならびに第１光散乱部分４５、第２光散乱部分４６、第３光散乱部分４７、および第４光散乱部分４８の一部分は、天井面より下側に配置され、天井面から露出している。 A part of the reflection member 30 and a part of the light guide plate 40 are accommodated in the space 19 in the main body 12. Specifically, in the space 19 in the main body portion 12, a part of the reflecting member 30, the inner ring portion 42, the outer ring portion 43, the first light scattering portion 45, the second light scattering portion 46, and the third light scattering. A portion 47 and a portion of the fourth light scattering portion 48 are housed.
That is, in a state where the lighting device 1 is attached to the ceiling, a part of the reflection member 30, the inner ring portion 42, the outer ring portion 43, the first light scattering portion 45, the second light scattering portion 46, and the third light scattering portion. 47 and a part of the fourth light scattering portion 48 are disposed below the ceiling surface and exposed from the ceiling surface.

また、図５に示すように、本体部１２のフランジ部分１７には、拡散カバー５０の側壁部５２を外嵌させた状態で、筐体１０と拡散カバー５０とが例えば接着等により固定されている。
（発光モジュール）
図３に戻って、発光モジュール２０は、円環板状の基板２１と、当該基板２１の一方の主面である素子搭載面２１ａに搭載された複数の発光素子２２とを有し、冠状部１１の内部の空間１８の天井面と平行な仮想面上に配置されている。発光モジュール２０の外径は筐体１０の冠状部１１の内径と略同じであり、発光モジュール２０を冠状部１１内の空間１８に収容するだけで発光モジュール２０の位置決めが完了する。各発光素子２２は、それぞれの主出射方向を導光板４０に向けた状態で、基板２１の素子搭載面２１ａに円環状に配列されている。 Further, as shown in FIG. 5, the casing 10 and the diffusion cover 50 are fixed to the flange portion 17 of the main body 12 with the side wall portion 52 of the diffusion cover 50 by, for example, adhesion or the like. Yes.
(Light emitting module)
Returning to FIG. 3, the light emitting module 20 includes an annular plate-shaped substrate 21 and a plurality of light emitting elements 22 mounted on an element mounting surface 21 a which is one main surface of the substrate 21, and a crown-shaped portion. 11 is arranged on a virtual plane parallel to the ceiling surface of the space 18 inside. The outer diameter of the light emitting module 20 is substantially the same as the inner diameter of the crown-shaped portion 11 of the housing 10, and the positioning of the light-emitting module 20 is completed only by housing the light-emitting module 20 in the space 18 in the crown-shaped portion 11. Each light emitting element 22 is arranged in an annular shape on the element mounting surface 21 a of the substrate 21 with the main emission direction directed toward the light guide plate 40.

基板２１は、例えば、セラミック基板や熱伝導樹脂等からなる絶縁層とアルミ板等からなる金属層との２層構造を有する。基板２１には配線パターン（不図示）が形成されており、各発光素子２２は前記配線パターンおよびコネクタ２４を介して電源線２３と電気的に接続されている。基板２１の素子搭載面２１ａは、光を効率良く導光板４０側へ反射させるための反射面となっている。   The substrate 21 has, for example, a two-layer structure of an insulating layer made of a ceramic substrate or a heat conductive resin and a metal layer made of an aluminum plate or the like. A wiring pattern (not shown) is formed on the substrate 21, and each light emitting element 22 is electrically connected to the power supply line 23 through the wiring pattern and the connector 24. The element mounting surface 21a of the substrate 21 is a reflecting surface for efficiently reflecting light toward the light guide plate 40 side.

発光素子２２は、例えば、ＬＥＤであって、基板２１の素子搭載面２１ａにＣＯＢ（Ｃｈｉｐ ｏｎ Ｂｏａｒｄ）技術を用いてフェイスアップ実装されている。なお、本発明に係る発光素子は、例えば、ＬＤ（レーザダイオード）や、ＥＬ素子（エレクトリックルミネッセンス素子）であってもよい。また、本発明に係る発光素子は、ＳＭＤ（Ｓｕｒｆａｃｅ Ｍｏｕｎｔ Ｄｅｖｉｃｅ）型のものが基板に搭載されていてもよい。   The light emitting element 22 is, for example, an LED, and is mounted face up on the element mounting surface 21a of the substrate 21 using a COB (Chip on Board) technique. The light emitting element according to the present invention may be, for example, an LD (laser diode) or an EL element (electric luminescence element). The light emitting element according to the present invention may be a SMD (Surface Mount Device) type mounted on a substrate.

（放熱部材）
図５に示すように、放熱部材３は、冠状部１１の上面に取り付けられている。放熱部材３は、例えば銅やアルミニウム等からなり、発光モジュール２０を構成する基板２１や素子搭載面２１ａに円環状に搭載された発光素子２２等で発生した熱を装置外部へ放熱する役割を有する。 (Heat dissipation member)
As shown in FIG. 5, the heat radiating member 3 is attached to the upper surface of the crown-shaped portion 11. The heat dissipating member 3 is made of, for example, copper or aluminum, and has a role of dissipating heat generated by the light emitting element 22 or the like mounted in a ring shape on the substrate 21 or the element mounting surface 21a constituting the light emitting module 20 to the outside of the apparatus. .

図５において、符号Ｈ３で示す範囲が放熱部材３である。このように、放熱部材３は、筐体１０が天井に取り着けられた状態において、埋込穴２ａ内に位置する。このため、天井面からの突出量は増えず、部屋内の住人にとって邪魔にならないため、放熱部材３には、放熱性能の高い大きな体積を有する放熱部材を採用することができる。
また、放熱部材３は、発光モジュール２０とともに埋込穴２ａ内に位置するため、発光モジュール２０の配置位置に近い位置に配置することができる。このため、照明装置１の主な発熱源である発光モジュール２０で発生した熱を装置外部へ効率的に放熱することができる。 In FIG. 5, the range indicated by the symbol H <b> 3 is the heat radiating member 3. Thus, the heat radiating member 3 is located in the embedding hole 2a in a state where the housing 10 is attached to the ceiling. For this reason, since the protrusion amount from a ceiling surface does not increase and it does not become a hindrance for the resident in a room, the heat radiating member which has a large volume with high heat radiating performance is employable.
Moreover, since the heat radiating member 3 is located in the embedding hole 2 a together with the light emitting module 20, it can be disposed at a position close to the position where the light emitting module 20 is disposed. For this reason, the heat generated in the light emitting module 20 that is the main heat source of the lighting device 1 can be efficiently radiated to the outside of the device.

（反射部材）
反射部材３０は、円形板状の内側反射部材３０ａと、内側反射部材３０ａの外周を囲むように配置される円環板状の外側反射部材３０ｂとで構成されており、発光素子２２から出射された光を反射して導光板４０に入射させる役割を有する。図５に示すように、反射部材３０は、冠状部１１内の空間１８および本体部１２内の空間１９にわたって配置されている。具体的には、内側反射部材３０ａは、導光板４０の環内側部４２の裏側に配置されており、外側反射部材３０ｂは、導光板４０の環外側部４３の裏側に配置されており、反射部材３０全体としては、発光素子２２を避けるようにして導光板４０の裏側に配置されている。 (Reflective member)
The reflection member 30 includes a circular plate-like inner reflection member 30 a and an annular plate-like outer reflection member 30 b disposed so as to surround the outer periphery of the inner reflection member 30 a, and is emitted from the light emitting element 22. It has the role of reflecting the incident light and making it incident on the light guide plate 40. As shown in FIG. 5, the reflecting member 30 is disposed over the space 18 in the crown-shaped portion 11 and the space 19 in the main body portion 12. Specifically, the inner reflection member 30a is disposed on the back side of the ring inner side portion 42 of the light guide plate 40, and the outer reflection member 30b is disposed on the back side of the ring outer side portion 43 of the light guide plate 40, and is reflected. The entire member 30 is disposed on the back side of the light guide plate 40 so as to avoid the light emitting element 22.

外側反射部材３０ｂの外径は筐体１０の冠状部１１の内径と略同じであり、外側反射部材３０ｂを冠状部１１内の空間１８に収容するだけで外側反射部材３０ｂの位置決めが完了する。内側反射部材３０ａおよび外側反射部材３０ｂの材料としては、高反射ポリカーボネート樹脂、高反射ナイロン樹脂、高反射ポリブチレンテレフタレート樹脂、高反射発泡樹脂等の反射率の高い材料が最適である。   The outer diameter of the outer reflecting member 30b is substantially the same as the inner diameter of the crown-shaped portion 11 of the housing 10, and the positioning of the outer reflecting member 30b is completed only by housing the outer reflecting member 30b in the space 18 in the crown-shaped portion 11. As materials for the inner reflecting member 30a and the outer reflecting member 30b, materials having high reflectivity such as highly reflective polycarbonate resin, highly reflective nylon resin, highly reflective polybutylene terephthalate resin, and highly reflective foamed resin are optimal.

図６に示すように、内側反射部材３０ａの表側の面は、第１光反射面３１ａと第２光反射面３２ａとで構成されている。第１光反射面３１ａは、導光板４０の環内側部４２の裏側の面４２ｂと対向しており、環内側部４２から裏側に漏れる光を反射させて環内側部４２に戻す役割を果たす。第２光反射面３２ａは、導光板４０の環状部４１の第２光散乱部分４６の裏側の面４６ｂと対向しており、第２光散乱部分４６から裏側に漏れる光を反射させて第２光散乱部分４６に戻す役割を果たす。   As shown in FIG. 6, the surface on the front side of the inner reflecting member 30a is composed of a first light reflecting surface 31a and a second light reflecting surface 32a. The first light reflecting surface 31 a faces the back surface 42 b of the ring inner portion 42 of the light guide plate 40 and plays a role of reflecting light leaking from the ring inner portion 42 to the back side and returning it to the ring inner portion 42. The second light reflecting surface 32a faces the surface 46b on the back side of the second light scattering portion 46 of the annular portion 41 of the light guide plate 40, and reflects the light leaking from the second light scattering portion 46 to the back side. It plays the role of returning to the light scattering portion 46.

また、図６に示すように、外側反射部材３０ｂの表側の面は、第１光反射面３１ｂと第２光反射面３２ｂとで構成されている。第１光反射面３１ｂは、導光板４０の環外側部４３の裏側の面４３ｂと対向しており、環外側部４３から裏側に漏れる光を反射させて環外側部４３に戻す役割を果たす。第２光反射面３２ｂは、導光板４０の環状部４１の第４光散乱部分４８の裏側の面４８ｂと対向しており、第４光散乱部分４８から裏側に漏れる光を反射させて第４光散乱部分４８に戻す役割を果たす。   Moreover, as shown in FIG. 6, the surface on the front side of the outer reflecting member 30b is composed of a first light reflecting surface 31b and a second light reflecting surface 32b. The first light reflecting surface 31 b faces the back surface 43 b of the outer ring portion 43 of the light guide plate 40, and plays a role of reflecting light leaking from the outer ring portion 43 to the back side and returning it to the outer ring portion 43. The second light reflecting surface 32b is opposed to the back surface 48b of the fourth light scattering portion 48 of the annular portion 41 of the light guide plate 40, and reflects the light leaking from the fourth light scattering portion 48 to the back side. It plays the role of returning to the light scattering portion 48.

また、図５に示すように、内側反射部材３０ａと外側反射部材３０ｂとは、導光板４０の裏側において、内側反射部材３０ａの外周面３３ａと外側反射部材３０ｂの内周面３３ｂとが間隔を空けて互いに対向した状態で配置されている。内側反射部材３０ａの外周面３３ａと外側反射部材３０ｂの内周面３３ｂとは、それぞれ光反射面となっている。
（導光板）
図３に示すように、導光板４０は、円形板状であって、発光素子２２からなる素子列に沿って円環状に形成された環状部４１と、環状部４１の環内側に環状部４１と連続して形成された円板状である環内側部４２と、環状部４１の環外側に環状部４１と連続して形成された円環状である環外側部４３とで構成される。それら、環状部４１、環内側部４２および環外側部４３の３つは一体に成形されている。導光板４０の材料としては、アクリル樹脂、ポリカーボネート樹脂、ポリスチレン樹脂、ガラス等の導光性の良い材料が最適である。 Further, as shown in FIG. 5, the inner reflecting member 30a and the outer reflecting member 30b are spaced apart from each other on the back side of the light guide plate 40 by the outer peripheral surface 33a of the inner reflecting member 30a and the inner peripheral surface 33b of the outer reflecting member 30b. They are arranged in a state of being opposed to each other. The outer peripheral surface 33a of the inner reflective member 30a and the inner peripheral surface 33b of the outer reflective member 30b are respectively light reflecting surfaces.
(Light guide plate)
As shown in FIG. 3, the light guide plate 40 has a circular plate shape, and has an annular portion 41 formed in an annular shape along the element row composed of the light emitting elements 22, and an annular portion 41 inside the annular portion 41. A disc-shaped annular inner portion 42 formed continuously with the annular portion 41, and an annular annular outer portion 43 formed continuously with the annular portion 41 outside the annular portion 41. Three of them, the annular part 41, the ring inner part 42 and the ring outer part 43, are integrally formed. As the material of the light guide plate 40, a material having good light guide properties such as acrylic resin, polycarbonate resin, polystyrene resin, and glass is optimal.

環状部４１は、素子列対向部分４４、第１光散乱部分４５、第２光散乱部分４６、第３光散乱部分４７、および第４光散乱部分４８で構成され、導光板４０内に発光素子２２から出射された光を導入する役割を有する。素子列対向部分４４は、複数の発光素子２２からなる素子列と対向する円環状である。第１光散乱部分４５は、素子列対向部分４４の環内側に位置し素子列対向部分４４に沿った円環状である。第２光散乱部分４６は、第１光散乱部分４５の環内側に位置し第１光散乱部分４５に沿った円環状である。第１光散乱部分４５と第２光散乱部分４６とで内側反射部分が構成される。第３光散乱部分４７は、素子列対向部分４４の環外側に位置し素子列対向部分４４に沿った円環状である。第４光散乱部分４８は、第３光散乱部分４７の環外側に位置し第３光散乱部分４７に沿った円環状である。第３光散乱部分４７と第２光散乱部分４８とで外側反射部分が構成されている。   The annular portion 41 includes an element array facing portion 44, a first light scattering portion 45, a second light scattering portion 46, a third light scattering portion 47, and a fourth light scattering portion 48, and a light emitting element is provided in the light guide plate 40. It has a role of introducing light emitted from the line 22. The element array facing portion 44 has an annular shape facing the element array composed of the plurality of light emitting elements 22. The first light scattering portion 45 is in an annular shape along the element row facing portion 44 located inside the ring of the element row facing portion 44. The second light scattering portion 46 is in an annular shape along the first light scattering portion 45 located inside the ring of the first light scattering portion 45. The first light scattering portion 45 and the second light scattering portion 46 constitute an inner reflection portion. The third light scattering portion 47 has an annular shape that is located outside the element array facing portion 44 and is located along the element array facing portion 44. The fourth light scattering portion 48 has an annular shape along the third light scattering portion 47 located outside the ring of the third light scattering portion 47. The third light scattering portion 47 and the second light scattering portion 48 constitute an outer reflection portion.

図６において、符号Ｗ４１で示す範囲が環状部４１であり、符号Ｗ４２で示す範囲が環内側部４２であり、符号Ｗ４３で示す範囲が環内側部４２である。環外側部４３の外周縁部は、本体部１２の面板１６上に載置された状態で、本体部１２の面板１６と拡散カバー５０の外周縁部５１ａとで挟持されることで位置決めされている。図６において、符号Ｗ４４で示す範囲が素子列対向部分４４であり、符号Ｗ４５で示す範囲が第１光散乱部分４５であり、符号Ｗ４６で示す範囲が第２光散乱部分４６であり、符号Ｗ４７で示す範囲が第３光散乱部分４７であり、符号Ｗ４８で示す範囲が第４光散乱部分４８である。   In FIG. 6, the range indicated by reference sign W <b> 41 is the annular part 41, the range indicated by reference sign W <b> 42 is the ring inner part 42, and the range indicated by reference sign W <b> 43 is the ring inner part 42. The outer peripheral edge portion of the outer ring portion 43 is positioned by being sandwiched between the face plate 16 of the main body portion 12 and the outer peripheral edge portion 51 a of the diffusion cover 50 while being placed on the face plate 16 of the main body portion 12. Yes. In FIG. 6, the range indicated by the symbol W44 is the element array facing portion 44, the range indicated by the symbol W45 is the first light scattering portion 45, the range indicated by the symbol W46 is the second light scattering portion 46, and the symbol W47 The range indicated by is the third light scattering portion 47, and the range indicated by the symbol W48 is the fourth light scattering portion.

また、図６に示すように、導光板４０の表側の面は、環状部４１の表側の面４１ａと、環内側部４２の表側の面４２ａと、環外側部４３の表側の面４３ａとで構成される。そして、環状部４１の表側の面４１ａは、素子列対向部分４４の表側の面４４ａと、内側反射部分の表側の面と、外側反射部分の表側の面とで構成される。内側反射部分の表側の面は、反射面であって、第１光散乱部分４５の表側の面である第１光散乱領域４５ａと、第２光散乱部分４６の表側の面である第２光散乱領域４６ａとで構成される。外側反射部分の表側の面も、反射面であって、第３光散乱部分４７の表側の面である第３光散乱領域４７ａと、第４光散乱部分４８の表側の面である第４光散乱領域４８ａとで構成される。   As shown in FIG. 6, the front surface of the light guide plate 40 includes a front surface 41 a of the annular portion 41, a front surface 42 a of the annular inner portion 42, and a front surface 43 a of the annular outer portion 43. Composed. The front side surface 41a of the annular portion 41 includes a front side surface 44a of the element array facing portion 44, a front side surface of the inner reflection portion, and a front side surface of the outer reflection portion. The front-side surface of the inner reflection portion is a reflection surface, and the first light-scattering region 45 a that is the front-side surface of the first light-scattering portion 45 and the second light that is the front-side surface of the second light-scattering portion 46. And a scattering region 46a. The surface on the front side of the outer reflection portion is also a reflection surface, and the third light scattering region 47a that is the surface on the front side of the third light scattering portion 47 and the fourth light that is the surface on the front side of the fourth light scattering portion 48. And a scattering region 48a.

図５に戻って、発光素子２２を覆う状態で導光板４０は、本体部１２内の空間１９の一部に配置されている。具体的には、本体部１２内の空間１９に、環内側部４２、環外側部４３、ならびに第１光散乱部分４５、第２光散乱部分４６、第３光散乱部分４７、および第４光散乱部分４８の一部分が収容されている。また、冠状部１１内の空間１８に、導光板４０の素子列対向部分４４、ならびに導光板４０の第１光散乱部分４５、第２光散乱部分４６、第３光散乱部分４７、および第４光散乱部分４８の一部分が収容されている。   Returning to FIG. 5, the light guide plate 40 is disposed in a part of the space 19 in the main body 12 so as to cover the light emitting element 22. Specifically, in the space 19 in the main body 12, the inner ring portion 42, the outer ring portion 43, the first light scattering portion 45, the second light scattering portion 46, the third light scattering portion 47, and the fourth light. A portion of the scattering portion 48 is accommodated. Further, in the space 18 in the crown portion 11, the element row facing portion 44 of the light guide plate 40, the first light scattering portion 45, the second light scattering portion 46, the third light scattering portion 47, and the fourth light guide plate 40 are provided. A portion of the light scattering portion 48 is accommodated.

また、導光板４０の裏側の面は、環状部４１の裏側の面４１ｂと、環内側部４２の裏側の面４２ｂと、環外側部４３の裏側の面４３ｂとで構成される。そして、環状部４１の裏側の面４１ｂは、素子列対向部分４４の裏側の面４４ｂと、第１光散乱部分４５の裏側の面４５ｂと、第２光散乱部分４６の裏側の面４６ｂと、第３光散乱部分４７の裏側の面４７ｂと、第４光散乱部分４８の裏側の面４８ｂとで構成される。   The back surface of the light guide plate 40 includes a back surface 41 b of the annular portion 41, a back surface 42 b of the annular inner portion 42, and a reverse surface 43 b of the annular outer portion 43. And the back side surface 41b of the annular portion 41 includes a back side surface 44b of the element array facing portion 44, a back side surface 45b of the first light scattering portion 45, a back side surface 46b of the second light scattering portion 46, The back surface 47 b of the third light scattering portion 47 and the back surface 48 b of the fourth light scattering portion 48 are configured.

環状部４１の表側の面４１ａは、裏側から環状部４１に入射した発光素子２２の光を、環内側部４２或いは環外側部４３に向けて反射させるための反射面となっている。図５および図６に示すように、導光板４０の縦断面（導光板４０の表側の面の中心を通り、且つ、導光板４０の表側の面と直交する仮想面で切断した断面）において、環状部４１の表側の面４１ａの形状は、中央が裏側に突出するよう折り返された略Ｖ字形である。折り返し部分は、裏側に膨らんだＲ形状になっている。折り返し部分の両側は、環内側部４２および環外側部４３に向けて効率良く光を反射させるために、それぞれ表側に膨らんだ略円弧形となっている。   The front surface 41 a of the annular portion 41 is a reflection surface for reflecting the light of the light emitting element 22 incident on the annular portion 41 from the back side toward the annular inner portion 42 or the annular outer portion 43. As shown in FIGS. 5 and 6, in the longitudinal section of the light guide plate 40 (cross section cut through a virtual plane passing through the center of the front side surface of the light guide plate 40 and orthogonal to the front side surface of the light guide plate 40). The shape of the surface 41a on the front side of the annular portion 41 is a substantially V-shape folded back so that the center protrudes to the back side. The folded portion has an R shape that swells on the back side. In order to reflect light efficiently toward the inner ring portion 42 and the outer ring portion 43, both sides of the folded portion are each formed in a substantially arc shape that swells to the front side.

環状部４１の表側の面４１ａには、光散乱処理が施されている。具体的には、第１光散乱領域４５ａ、第２光散乱領域４６ａ、第３光散乱領域４７ａ、および第４光散乱領域４８ａに、光散乱処理として凹部４５ｃ，４６ｃ，４７ｃ，４８ｃが設けられている。光散乱処理が施されているため、環状部４１内から表側の面４１ａに入射した光は、全反射されるのではなく、その一部が凹部４５ｃ，４６ｃ，４７ｃ，４８ｃで散乱されて、導光板４０の外部へと出射される。なお、素子列対向部分４４の表側の面４４ａには凹部は設けられていない。   The front surface 41a of the annular portion 41 is subjected to light scattering processing. Specifically, the first light scattering region 45a, the second light scattering region 46a, the third light scattering region 47a, and the fourth light scattering region 48a are provided with recesses 45c, 46c, 47c, and 48c as a light scattering process. ing. Since the light scattering process is performed, the light incident on the front side surface 41a from the inside of the annular portion 41 is not totally reflected, but a part thereof is scattered by the recesses 45c, 46c, 47c, 48c, The light is emitted to the outside of the light guide plate 40. Note that no concave portion is provided on the front surface 44 a of the element array facing portion 44.

本実施の形態において、凹部４５ｃ，４６ｃ，４７ｃ，４８ｃは、形状がそれぞれ略半球状であって、大きさは全て同じである。なお、本発明に係る凹部の形状および大きさ等は任意であり、光散乱効果が得られるものであればよく、形状としては例えば略円錐状や略円錐台状等であってもよい。
図６に戻って、環状部４１の裏側の面４１ｂの一部は、発光素子２２の光が入射する入射面となっている。素子列対向部分４４の裏側の面４４ｂがその入射面に相当する。素子列対向部分４４の裏側の面４４ｂは、複数の発光素子２２からなる素子列に対向した円環状である。さらに、環状部４１の裏側の面４１ｂの全体は、基板２１の素子搭載面２１ａで反射した光が環状部４１に入射するための入射面としても機能している。 In the present embodiment, the recesses 45c, 46c, 47c, and 48c are substantially hemispherical in shape and all have the same size. The shape and size of the recess according to the present invention are arbitrary, and any shape can be used as long as the light scattering effect can be obtained. The shape may be, for example, a substantially conical shape or a substantially truncated cone shape.
Returning to FIG. 6, a part of the back surface 41 b of the annular portion 41 is an incident surface on which light of the light emitting element 22 is incident. The back surface 44b of the element array facing portion 44 corresponds to the incident surface. The back surface 44 b of the element array facing portion 44 has an annular shape facing the element array composed of the plurality of light emitting elements 22. Furthermore, the entire surface 41 b on the back side of the annular portion 41 also functions as an incident surface for the light reflected by the element mounting surface 21 a of the substrate 21 to enter the annular portion 41.

環内側部４２の表側の面４２ａは、環内側部４２内に入射した光の一部が出射する光出射面となっている。環外側部４３の表側の面４３ａは、環外側部４３内に入射した光の一部が出射する光出射面となっている。
環内側部４２の裏側の面４２ｂには、光散乱処理として凹部４２ｃが設けられている。したがって、環内側部４２内で凹部４２ｃに入射した光は散乱光となり、表側の面４２ａから出射される。凹部４２ｃは、環内側部４２の裏側の面４２ｂの中心に近づくほど単位面積当たりの数が多くなっており、これにより表側の面４２ａの全体から均一に光が出射されるようになっている。 The surface 42a on the front side of the ring inner portion 42 is a light emitting surface from which a part of the light incident on the ring inner portion 42 is emitted. The surface 43 a on the front side of the outer ring portion 43 is a light emitting surface from which a part of the light incident on the outer ring portion 43 is emitted.
The back surface 42b of the ring inner portion 42 is provided with a recess 42c as a light scattering process. Therefore, the light incident on the recess 42c in the ring inner portion 42 becomes scattered light and is emitted from the front surface 42a. The number of the recesses 42c per unit area increases toward the center of the back side surface 42b of the ring inner side portion 42, so that light is uniformly emitted from the entire front side surface 42a. .

環外側部４３の裏側の面４３ｂには、光散乱処理として凹部４３ｃが設けられている。したがって、環外側部４３内で凹部４３ｃに入射した光は散乱光となり、表側の面４３ａから出射される。凹部４３ｃは、環外側部４３の裏側の面４３ｂの外周縁に近づくほど単位面積当たりの数が多くなっており、これにより表側の面４３ａの全体から均一に光が出射されるようになっている。一方、図３に示すように、環外側部４３の外周面４３ｄには、当該外周面４３ｄから導光板４０の外部へ光が漏れないような加工が施されている。環外側部４３内を進行し外周面４３ｄに到達した光は、外周面４３ｄで反射されるため、環外側部４３から出ることなく戻り光となって環状部４１に向かう。   A recess 43c is provided on the back surface 43b of the outer ring portion 43 as a light scattering process. Therefore, the light incident on the concave portion 43c in the outer ring portion 43 becomes scattered light and is emitted from the front surface 43a. The number of the recesses 43c per unit area increases toward the outer peripheral edge of the back surface 43b of the outer ring portion 43, so that light is uniformly emitted from the entire front surface 43a. Yes. On the other hand, as shown in FIG. 3, the outer peripheral surface 43 d of the outer ring portion 43 is processed so that light does not leak from the outer peripheral surface 43 d to the outside of the light guide plate 40. The light that travels in the outer ring portion 43 and reaches the outer peripheral surface 43d is reflected by the outer peripheral surface 43d, and thus returns to the annular portion 41 without returning from the outer ring portion 43.

なお、環内側部４２および環外側部４３に施される光散乱処理は上記に限定されず任意である。例えば、光散乱処理として凹部ではなく凸部が設けられていても良いし、凹部と凸部の両方が設けられていてもよい。また、光散乱処理が裏側の面４２ｂ，４３ｂではなく表側の面４２ａ，４３ａに施されていても良いし、裏側の面４２ｂ，４３ｂと表側の面４２ａ，４３ａの両方に施されていても良い。但し、環内側部４２の表側の面４２ａおよび環外側部４３の表側の面４３ａの全体から、均一に光が出射するような態様であることが好ましい。   In addition, the light scattering process performed on the ring inner part 42 and the ring outer part 43 is not limited to the above and is arbitrary. For example, a convex portion instead of the concave portion may be provided as the light scattering process, or both the concave portion and the convex portion may be provided. Further, the light scattering treatment may be performed not on the back surfaces 42b and 43b but on the front surfaces 42a and 43a, or may be performed on both the back surfaces 42b and 43b and the front surfaces 42a and 43a. good. However, it is preferable that light is uniformly emitted from the entire front surface 42 a of the ring inner portion 42 and the entire front surface 43 a of the ring outer portion 43.

また、図６に示すように、素子列対向部分４４は、冠状部１１内の空間１８に配置されている。また、第１光散乱部分４５、第２光散乱部分４６、第３光散乱部分４７、および第４光散乱部分４８は、冠状部１１内の空間１８および本体部１２内の空間１９にわたって配置されている。また、環内側部４２および環外側部４３は、本体部１２空間１９に配置されている。   Further, as shown in FIG. 6, the element array facing portion 44 is disposed in the space 18 in the crown-shaped portion 11. Further, the first light scattering portion 45, the second light scattering portion 46, the third light scattering portion 47, and the fourth light scattering portion 48 are disposed over the space 18 in the crown-shaped portion 11 and the space 19 in the main body portion 12. ing. The ring inner portion 42 and the ring outer portion 43 are disposed in the main body portion 12 space 19.

導光板４０のうち、第１光散乱部分４５、第２光散乱部分４６、第３光散乱部分４７、および第４光散乱部分４８の反射面から反射した光を出射させる環内側部４２および環外側部４３が、照明装置１を天井に取り着けた状態において埋込穴２ａよりも外側へ張り出している本体部１２内の空間１９に配置されているので、天井面からの突出量を抑えながら、導光板を用いた面発光する照明装置としての機能を確保することができる。   In the light guide plate 40, the ring inner portion 42 and the ring for emitting the light reflected from the reflection surfaces of the first light scattering portion 45, the second light scattering portion 46, the third light scattering portion 47, and the fourth light scattering portion 48. Since the outer portion 43 is disposed in the space 19 in the main body portion 12 projecting outward from the embedding hole 2a in a state where the lighting device 1 is attached to the ceiling, the amount of protrusion from the ceiling surface is suppressed. The function as a lighting device that emits light using a light guide plate can be secured.

（拡散カバー）
拡散カバー５０は、例えば、シリコーン樹脂、アクリル樹脂、ポリカーボネート樹脂、ガラス等の透光性材料により形成されており、導光板４０から出射された光は拡散カバー５０を透過して照明装置１の外部へ取り出される。
拡散カバー５０は、導光板４０を覆うドーム状の本体部５１と、当該本体部５１の周縁部から裏側方向へ延設された側壁部５２とを有し、当該側壁部５２が筐体１０の本体部１２のフランジ部分１７に固定されている。本体部５１には光散乱処理が施されており、導光板４０から出射された光は本体部５１を透過する際に散乱光となる。したがって、より輝度むらがより一層軽減される。 (Diffusion cover)
The diffusion cover 50 is formed of a light-transmitting material such as silicone resin, acrylic resin, polycarbonate resin, or glass, for example, and light emitted from the light guide plate 40 passes through the diffusion cover 50 and is external to the lighting device 1. Is taken out.
The diffusion cover 50 includes a dome-shaped main body 51 that covers the light guide plate 40, and a side wall 52 that extends from the peripheral edge of the main body 51 toward the back side. It is fixed to the flange portion 17 of the main body 12. The main body 51 is subjected to a light scattering process, and light emitted from the light guide plate 40 becomes scattered light when passing through the main body 51. Therefore, the luminance unevenness is further reduced.

このように、本実施の形態にかかる照明装置１では、筐体１０の天井面に対面する側の面板の中央部に、筐体１０が天井に取着された状態において埋込穴２ａに没入する冠状部１１が設ける。そして、その冠状部１１内の空間１８に発光モジュール２０を配置する。一方、天井面から露出している本体部１２内の空間１９に、導光板４０の出射部分である環内側部４２および環外側部４３を配置する。発光素子２２を備える発光モジュール２０が、天井面より上側の埋込穴２ａ内に配置され、導光板４０のうち出射部分である環内側部４２および環外側部４３が、天井面より下側に配置され天井面から露出しているので、発光素子と導光板とを縦配置で配置する直下型方式の照明装置において、照明装置としての明るさを確保しつつ、天井面からの突出量を抑えることができる。   As described above, in the lighting device 1 according to the present embodiment, in the center portion of the face plate on the side facing the ceiling surface of the housing 10, the housing 10 is immersed in the embedding hole 2 a in a state where the housing 10 is attached to the ceiling. A coronal portion 11 is provided. Then, the light emitting module 20 is disposed in the space 18 in the crown portion 11. On the other hand, an annular inner portion 42 and an annular outer portion 43 that are emission portions of the light guide plate 40 are disposed in the space 19 in the main body portion 12 exposed from the ceiling surface. The light emitting module 20 including the light emitting element 22 is disposed in the embedded hole 2a above the ceiling surface, and the ring inner portion 42 and the ring outer portion 43, which are emission portions, of the light guide plate 40 are located below the ceiling surface. Since it is arranged and exposed from the ceiling surface, in the direct type lighting device in which the light emitting element and the light guide plate are arranged in a vertical arrangement, the projection amount from the ceiling surface is suppressed while ensuring the brightness as the lighting device. be able to.

≪実施の形態２≫
図７は、第２の実施形態に係る照明装置を示す分解斜視図である。図８は、実施の形態２にかかる照明装置を示す断面図である。
第２の実施形態に係る照明装置１００は、反射部材１３０が内側反射部材だけで構成されており、導光板１４０が環外側部を備えていない点において第１の実施の形態にかかる照明装置１と大きく異なる。第１の実施の形態に係る照明装置１と同様の点も多いので、両者の相違点についてのみ説明し、共通する構成については同じ符号を使って説明を省略する。 << Embodiment 2 >>
FIG. 7 is an exploded perspective view showing the lighting apparatus according to the second embodiment. FIG. 8 is a cross-sectional view illustrating the lighting apparatus according to the second embodiment.
The illuminating device 100 according to the second embodiment includes the illuminating device 1 according to the first embodiment in that the reflecting member 130 includes only the inner reflecting member and the light guide plate 140 does not include the outer ring portion. And very different. Since there are many points similar to those of the lighting device 1 according to the first embodiment, only the differences between the two will be described, and the same reference numerals are used for the common configurations, and description thereof is omitted.

図７および図８に示すように、照明装置１００は、筐体１０、発光モジュール１２０、反射部材１３０、導光板１４０、拡散カバー５０、および放熱部材３を備える。
（筐体）
図７および図８に示すように、照明装置１００の筐体１０は、実施の形態１にかかる照明装置１の筐体と同様のものである。 As shown in FIGS. 7 and 8, the lighting device 100 includes a housing 10, a light emitting module 120, a reflecting member 130, a light guide plate 140, a diffusion cover 50, and a heat radiating member 3.
(Casing)
As illustrated in FIGS. 7 and 8, the housing 10 of the lighting device 100 is the same as the housing of the lighting device 1 according to the first embodiment.

冠状部１１内の空間１８には、発光モジュール１２０、反射部材１３０の一部および導光板１４０の一部が収容されている。具体的には、冠状部１１内の空間１８には、発光素子２２が配置された発光モジュール１２０、反射部材１３０の一部分、ならびに導光板１４０の素子列対向部分および光散乱部分の一部分が収容されている。
すなわち、照明装置１が天井に取り着けられた状態において、発光素子２２が配置された発光モジュール１２０、反射部材１３０の一部分、ならびに導光板１４０の素子列対向部分および光散乱部分の一部分は、天井面より上側の埋込穴２ａ内に位置する。 In the space 18 in the crown 11, the light emitting module 120, a part of the reflecting member 130 and a part of the light guide plate 140 are accommodated. Specifically, the space 18 in the crown portion 11 accommodates the light emitting module 120 in which the light emitting element 22 is disposed, a part of the reflecting member 130, and a part of the light guide plate 140 facing the element row and a part of the light scattering part. ing.
That is, in a state in which the lighting device 1 is mounted on the ceiling, the light emitting module 120 in which the light emitting elements 22 are arranged, a part of the reflecting member 130, and a part of the light guide plate 140 facing the element row and a part of the light scattering part are the ceiling. It is located in the embedding hole 2a above the surface.

また、本体部１２内の空間１９には、反射部材１３０の一部と導光板１４０の一部とが収容されている。具体的には、本体部１２内の空間１９には、反射部材１３０の一部分、環内側部１４２ならびに光散乱部分の一部分が収容されている。
すなわち、照明装置１が天井に取り付けられた状態において、反射部材１３０の一部と導光板１４０の一部とが収容されている。具体的には、本体部１２内の空間１９には、反射部材１３０の一部分、環内側部１４２、および光散乱部分の一部分は、天井面より下側に配置され、天井面から露出している。 A part of the reflection member 130 and a part of the light guide plate 140 are accommodated in the space 19 in the main body 12. Specifically, the space 19 in the main body 12 accommodates a part of the reflecting member 130, the ring inner part 142, and a part of the light scattering part.
That is, in a state where the lighting device 1 is attached to the ceiling, a part of the reflecting member 130 and a part of the light guide plate 140 are accommodated. Specifically, in the space 19 in the main body 12, a part of the reflecting member 130, the ring inner part 142, and a part of the light scattering part are disposed below the ceiling surface and exposed from the ceiling surface. .

（発光モジュール）
発光モジュール１２０は、円環板状の基板１２１と、当該基板１２１の一方の主面である素子搭載面１２１ａに搭載された複数の発光素子２２とを有し、冠状部１１の内部の空間１８の天井面と平行な仮想面上に配置されている。発光モジュール１２０の外径は筐体１０の冠状部１１の内径と略同じであり、発光モジュール１２０を冠状部１１内の空間１８に収容するだけで発光モジュール２０の位置決めが完了する。各発光素子２２は、それぞれの主出射方向を導光板１４０に向けた状態で、基板１２１の素子搭載面１２１ａに円環状に配列されている。基板１２１は、実施の形態１にかかる基板２１と比較して、発光素子２２の搭載位置がより外周側に設置されている点を除いて略同様である。 (Light emitting module)
The light emitting module 120 includes an annular plate-shaped substrate 121 and a plurality of light emitting elements 22 mounted on the element mounting surface 121a which is one main surface of the substrate 121, and the space 18 inside the crown-shaped portion 11. It is arranged on a virtual plane parallel to the ceiling surface of. The outer diameter of the light emitting module 120 is substantially the same as the inner diameter of the crown-shaped portion 11 of the housing 10, and the positioning of the light-emitting module 20 is completed only by housing the light-emitting module 120 in the space 18 in the crown-shaped portion 11. The respective light emitting elements 22 are arranged in an annular shape on the element mounting surface 121a of the substrate 121 in a state in which the respective main emission directions are directed toward the light guide plate 140. The substrate 121 is substantially the same as the substrate 21 according to the first embodiment except that the mounting position of the light emitting element 22 is installed on the outer peripheral side.

（放熱部材）
図８に示すように、照明装置１００の放熱部材３は、実施の形態１にかかる照明装置１の放熱部材と同様のものである。
（反射部材）
反射部材１３０は、内側反射部材だけで構成されており、図８に示すように、冠状部１１内の空間１８および本体部１２内の空間１９にわたって配置されている。具体的には、反射部材１３０は、導光板１４０の環内側部１４２の裏側に、発光素子２２を避けるようにして、導光板１４０に対して近接配置されている。 (Heat dissipation member)
As shown in FIG. 8, the heat dissipation member 3 of the lighting device 100 is the same as the heat dissipation member of the lighting device 1 according to the first embodiment.
(Reflective member)
The reflection member 130 is composed only of the inner reflection member, and is disposed over the space 18 in the crown-shaped portion 11 and the space 19 in the main body portion 12 as shown in FIG. Specifically, the reflecting member 130 is disposed in the vicinity of the light guide plate 140 on the back side of the ring inner portion 142 of the light guide plate 140 so as to avoid the light emitting element 22.

反射部材１３０の第１光反射面１３１ａは、導光板１４０の環内側部１４２の裏側の面と対向しており、環内側部１４２から裏側に漏れる光を反射させて環内側部１４２に戻す役割を果たす。第２光反射面１３２ａは、導光板１４０の環状部１４１の第２光散乱部分１４６の裏側の面と対向しており、第２光散乱部分１４６から裏側に漏れる光を反射させて第２光散乱部分１４６に戻す役割を果たす。第１光反射面１３１ａは、環内側部１４２の裏側の面と面接触しており、第２光反射面１３２ａは、第２光散乱部分１４６の裏側の面と面接触している。   The first light reflecting surface 131 a of the reflecting member 130 faces the back surface of the inner ring portion 142 of the light guide plate 140, and plays a role of reflecting light leaking from the inner ring portion 142 to the rear side and returning it to the inner ring portion 142. Fulfill. The second light reflecting surface 132a is opposed to the surface on the back side of the second light scattering portion 146 of the annular portion 141 of the light guide plate 140, and reflects the light leaking from the second light scattering portion 146 to the back side to generate the second light. It plays the role of returning to the scattering portion 146. The first light reflecting surface 131a is in surface contact with the back surface of the ring inner portion 142, and the second light reflecting surface 132a is in surface contact with the back surface of the second light scattering portion 146.

（導光板）
導光板１４０が環外側部を備えていない点において、第１の実施の形態にかかる導光板４０と異なる。
図８に示すように、導光板１４０は、円形板状であって、発光素子２２からなる素子列に沿って円環状に形成された環状部１４１と、環状部１４１に外周を囲まれた円板状である環内側部１４２とで構成される。それら、環状部１４１および環内側部１４２は一体に成形されている。 (Light guide plate)
The light guide plate 140 is different from the light guide plate 40 according to the first embodiment in that the light guide plate 140 does not include an outer ring portion.
As shown in FIG. 8, the light guide plate 140 has a circular plate shape, an annular portion 141 formed in an annular shape along the element row composed of the light emitting elements 22, and a circle surrounded by the annular portion 141. It is comprised by the ring inner side part 142 which is plate shape. The annular portion 141 and the inner ring portion 142 are integrally formed.

環状部１４１は、素子列対向部分１４４と、第１光散乱部分１４５と、第２光散乱部分１４６とで構成される。第１光散乱部分１４５と第２光散乱部分１４６とで内側反射部分が構成される。素子列対向部分１４４は、複数の発光素子２２からなる素子列と対向する円環状である。第１光散乱部分１４５は、素子列対向部分１４４の環内側に位置し素子列対向部分１４４に沿った円環状である。第２光散乱部分１４６は、第１光散乱部分１４５の環内側に位置し第１光散乱部分１４５に沿った円環状である。   The annular portion 141 includes an element row facing portion 144, a first light scattering portion 145, and a second light scattering portion 146. The first light scattering portion 145 and the second light scattering portion 146 constitute an inner reflection portion. The element row facing portion 144 has an annular shape facing the element row composed of the plurality of light emitting elements 22. The first light scattering portion 145 has an annular shape along the element row facing portion 144 that is located inside the ring of the element row facing portion 144. The second light scattering portion 146 has an annular shape that is located inside the ring of the first light scattering portion 145 and extends along the first light scattering portion 145.

導光板１４０の縦断面において、環状部１４１の表側の面の形状は、表側に膨らんだ略円弧形となっている。環状部１４１の表側の面は、裏側から環状部１４１に入射した発光素子２２の光を、環内側部１４２に反射させるための反射面となっている。素子列対向部分１４４の裏側の面がその入射面に相当する。素子列対向部分１４４の裏側の面は、複数の発光素子２２からなる素子列に対向した円環状である。さらに、環状部１４１の裏側の面の全体は、基板１２１の素子搭載面１２１ａで反射した光が環状部１４１に入射するための入射面としても機能している。   In the longitudinal section of the light guide plate 140, the shape of the front side surface of the annular portion 141 is a substantially arc shape that swells to the front side. The surface on the front side of the annular portion 141 is a reflection surface for reflecting the light of the light emitting element 22 incident on the annular portion 141 from the back side to the inner ring portion 142. The back surface of the element array facing portion 144 corresponds to the incident surface. The surface on the back side of the element array facing portion 144 has an annular shape facing the element array composed of the plurality of light emitting elements 22. Furthermore, the entire surface on the back side of the annular portion 141 also functions as an incident surface for the light reflected by the element mounting surface 121 a of the substrate 121 to enter the annular portion 141.

環状部１４１の表側の面には、実施の形態１にかかる導光板４０と同様の光散乱処理が施されている。これにより、環状部１４１に外周を囲まれた円板状である環内側部１４２に、発光素子２２から出射された光を導入することができる。
環内側部１４２の構成は、第１の実施形態にかかる環内側部４２と略同様である。
（拡散カバー）
図７および図８に示すように、照明装置１００の拡散カバー５０は、実施の形態１にかかる照明装置１の筐体と同様のものである。 A light scattering process similar to that of the light guide plate 40 according to the first embodiment is performed on the front side surface of the annular portion 141. As a result, the light emitted from the light emitting element 22 can be introduced into the annular inner portion 142 that is disk-shaped and surrounded by the annular portion 141.
The configuration of the ring inner portion 142 is substantially the same as that of the ring inner portion 42 according to the first embodiment.
(Diffusion cover)
As shown in FIGS. 7 and 8, the diffusion cover 50 of the lighting device 100 is the same as the housing of the lighting device 1 according to the first embodiment.

このように、本実施の形態にかかる照明装置１００では、冠状部１１内の空間１８に発光モジュール１２０を配置する。一方、天井面から露出している本体部１２内の空間１９に、導光板１４０の出射部分である環内側部１４２を配置する。発光素子２２を備える発光モジュール１２０が、天井面より上側の埋込穴２ａ内に配置され、導光板１４０のうち出射部分である環内側部１４２が、天井面より下側に配置され天井面から露出しているので、発光素子と導光板とを縦配置で配置する直下型方式の照明装置において、照明装置としての明るさを確保しつつ、天井面からの突出量を抑えることができる。   Thus, in the illumination device 100 according to the present embodiment, the light emitting module 120 is disposed in the space 18 in the crown portion 11. On the other hand, the ring inner side part 142 which is an emission part of the light guide plate 140 is arranged in the space 19 in the main body part 12 exposed from the ceiling surface. The light emitting module 120 including the light emitting element 22 is disposed in the embedded hole 2a on the upper side of the ceiling surface, and the ring inner side portion 142 that is an emission portion of the light guide plate 140 is disposed on the lower side of the ceiling surface so Since it is exposed, in the direct type illumination device in which the light emitting element and the light guide plate are arranged in a vertical arrangement, the projection amount from the ceiling surface can be suppressed while ensuring the brightness as the illumination device.

［変形例］
なお、上記の実施の形態に基づいて説明してきたが、本発明は上記の実施の形態に限定されないことはもちろんである。以下のような場合も本発明に含まれる。
（ａ）上記の実施の形態において、導光板の素子列対向部分４４は、冠状部１１内の空間１８に配置され、導光板４０の環内側部４２および環外側部４３は、本体部１２内の空間１９に配置されているとしたが、本発明は必ずしもこの場合に限定されない。導光板の出射部分である環内側部４２および環外側部４３が、本体部１２内の空間１９に配置されていれば足りる。例えば、導光板４０の環状部４１（導入部分）を本体部１２内の空間１９に配置するとしてもよい。 [Modification]
In addition, although it demonstrated based on said embodiment, of course, this invention is not limited to said embodiment. The following cases are also included in the present invention.
(A) In the above-described embodiment, the element row facing portion 44 of the light guide plate is disposed in the space 18 in the crown-shaped portion 11, and the ring inner portion 42 and the ring outer portion 43 of the light guide plate 40 are disposed in the main body portion 12. However, the present invention is not necessarily limited to this case. It suffices if the ring inner portion 42 and the ring outer portion 43, which are emission portions of the light guide plate, are arranged in the space 19 in the main body portion 12. For example, the annular portion 41 (introduction portion) of the light guide plate 40 may be disposed in the space 19 in the main body portion 12.

また、上記の実施の形態において、反射板３０は、冠状部１１内の空間１８および本体部１２内の空間１９にわたって配置されるとしたが、本発明は必ずしもこの場合に限定されない。本発明の一態様にかかる照明装置は、反射板の少なくとも一部が冠状部１１内の空間１８に配置されていれば足りる。例えば、反射部材３０の全ての部分を冠状部１１内の空間１８に配置するとしてもよい。   In the above embodiment, the reflector 30 is arranged over the space 18 in the coronal part 11 and the space 19 in the main body part 12, but the present invention is not necessarily limited to this case. In the lighting device according to one embodiment of the present invention, it is sufficient that at least a part of the reflecting plate is disposed in the space 18 in the coronal portion 11. For example, all the portions of the reflecting member 30 may be disposed in the space 18 in the crown portion 11.

（ｂ）上記の実施の形態において、導光板４０が円形板状である場合を示したが、本発明は必ずしもこの場合に限定されない。導光板４０は、例えば、四角形板状、六角形板状、八角形板状等のような多角形の板状であってもよい。また、環状部４１、環内側部４２、環外側部４３、素子列対向部分４４、第１光散乱部分４５、第２光散乱部分４６、第３光散乱部分４７、および第４光散乱部分４８の各形状も、導光板４０の形状に応じて任意である。   (B) Although the case where the light guide plate 40 has a circular plate shape is shown in the above embodiment, the present invention is not necessarily limited to this case. The light guide plate 40 may be a polygonal plate shape such as a quadrangular plate shape, a hexagonal plate shape, an octagonal plate shape, or the like. Further, the annular portion 41, the annular inner portion 42, the annular outer portion 43, the element array facing portion 44, the first light scattering portion 45, the second light scattering portion 46, the third light scattering portion 47, and the fourth light scattering portion 48. These shapes are also arbitrary according to the shape of the light guide plate 40.

（ｃ）上記の実施の形態において、複数個の発光素子２２を環状に配列する場合を示したが、本発明は必ずしもこの場合に限定されない。発光素子２２は少なくとも１つ以上であればよい。また、発光素子２２の配列や基板２１の形状も導光板４０の形状に応じて任意である。
（ｄ）上記の実施の形態において、冠状部１１の形状は、断面円形の柱状のものに限られない。冠状部１１の形状は、発光素子２２の配列や基板２１の形状に応じて任意である。例えば、冠状部１１の形状は、断面四角形、断面六角形、断面八角形のような断面多角形の柱状であってもよい。 (C) Although the case where the plurality of light emitting elements 22 are arranged in a ring shape is shown in the above embodiment, the present invention is not necessarily limited to this case. The light emitting element 22 should just be at least 1 or more. Further, the arrangement of the light emitting elements 22 and the shape of the substrate 21 are arbitrary depending on the shape of the light guide plate 40.
(D) In the above embodiment, the shape of the crown portion 11 is not limited to a columnar shape with a circular cross section. The shape of the crown portion 11 is arbitrary depending on the arrangement of the light emitting elements 22 and the shape of the substrate 21. For example, the shape of the crown portion 11 may be a columnar shape having a polygonal cross section such as a quadrangular cross section, a hexagonal cross section, and an octagonal cross section.

すなわち、本実施の形態にかかる照明装置は、上述の説明や図面等で示した構造や形状のものに限られず、天井に取着された状態において、天井面から露出する第１の筐体部（本体部）と、埋込穴内に位置する第２の筐体部（冠状部）とを含む構造であればよい。そして、導光板の少なくとも一部分、具体的には導光板の出射部分が、第１の筐体部（本体部）内の収容部分に配置され、発光素子が、主出射方向を導光板に向けた状態で、第２の筐体部内（冠状部）の収容部分に配置されていればよい。これにより、照明装置として十分な明るさを確保するとともに、天井面からの突出量が少ない照明装置を提供することができる。   That is, the lighting device according to the present embodiment is not limited to the structure and shape shown in the above description and drawings, and the first housing portion exposed from the ceiling surface when attached to the ceiling. Any structure including the (main body portion) and the second housing portion (crown-shaped portion) located in the embedding hole may be used. Then, at least a part of the light guide plate, specifically, an emission part of the light guide plate is arranged in the housing part in the first housing part (main body part), and the light emitting element has the main emission direction directed to the light guide plate. In the state, it should just be arrange | positioned in the accommodating part in a 2nd housing | casing part (crown-shaped part). Thereby, while ensuring sufficient brightness as an illuminating device, the illuminating device with little protrusion amount from a ceiling surface can be provided.

（ｅ）上記の実施の形態において、天井面に対して水平方向の冠状部１１の範囲Ｗ１１は、天井面に対して水平方向の埋込穴２ａの範囲Ｗ２ａよりも小さくなるように設計されている。これにより、冠状部１１と埋込穴２ａとの間に空間６０が形成されている。本体部１２の外周縁部１２ａと天井板２とを密着させず、外周縁部１２ａと天井板２との間に隙間を設けて照明装置１を取り着けた場合、この空間６０は排熱経路として働き、発光モジュール２０等から発生した熱を、埋込穴２ａから装置外部へ排熱することができる。   (E) In the above embodiment, the range W11 of the crown-shaped portion 11 in the horizontal direction with respect to the ceiling surface is designed to be smaller than the range W2a of the embedded hole 2a in the horizontal direction with respect to the ceiling surface. Yes. Thereby, a space 60 is formed between the crown 11 and the embedding hole 2a. When the outer peripheral edge 12a of the main body 12 and the ceiling plate 2 are not brought into close contact with each other and the lighting device 1 is attached with a gap provided between the outer peripheral edge 12a and the ceiling board 2, the space 60 has an exhaust heat path. The heat generated from the light emitting module 20 and the like can be exhausted from the embedded hole 2a to the outside of the apparatus.

（ｆ）上記の実施の形態において、封止部材４を、天井板２の天井裏面２ｂに掛止させることによって、照明装置１を天井板２に取り着けられているとしたが、本発明は必ずしもこの場合に限定されない。掛止部材４による天井裏面２ｂへの掛止に加え、パッキンを用いて、天井板２の天井表面２ｃと本体部１２の面板１６の一部分とを接着してもよい。パッキンを用いて接着することにより、天井面２と本体部１２の面板１６との間に空間ができる。この空間は排熱経路として働き、発光モジュール２０から発生した熱を、埋込穴２ａから排熱することができる。   (F) In the above embodiment, the lighting device 1 is attached to the ceiling plate 2 by hooking the sealing member 4 on the ceiling back surface 2b of the ceiling plate 2. It is not necessarily limited to this case. In addition to the hooking member 4 being hooked on the ceiling back surface 2b, the ceiling surface 2c of the ceiling plate 2 and a part of the face plate 16 of the main body 12 may be bonded using packing. By bonding using packing, a space is formed between the ceiling surface 2 and the face plate 16 of the main body 12. This space functions as a heat exhaust path, and heat generated from the light emitting module 20 can be exhausted from the embedded hole 2a.

本発明にかかる照明装置は、例えば、ダウンライト等の天井に形成された埋込穴を利用して取り着けられる照明装置に利用可能である。   The illuminating device according to the present invention can be used, for example, in an illuminating device that can be mounted using an embedding hole formed in a ceiling such as a downlight.

１、１００ 照明装置
２ 天井板
３ 放熱部材
４ 掛止部材
１０ 筐体
１１ 冠状部
１２ 本体部
１８、１９ 空間
２０、１２０ 発光モジュール
２１、１２１ 基板
２２ 発光素子
３０、１３０ 反射部材
４０、１４０ 導光板
４１、１４１ 環状部
４２、１４２ 環内側部
４３ 環外側部
４４、１４４ 素子列対向部分
５０ 拡散カバー DESCRIPTION OF SYMBOLS 1,100 Lighting device 2 Ceiling board 3 Heat radiating member 4 Latching member 10 Case 11 Crown-shaped part 12 Main body part 18, 19 Space 20, 120 Light emitting module 21, 121 Substrate 22 Light emitting element 30, 130 Reflective member 40, 140 Light guide plate 41, 141 Annular part 42, 142 Annular inner part 43 Annular outer part 44, 144 Element array facing part 50 Diffusion cover

Claims (4)

天井に形成された埋込穴を利用して取り着けられる照明装置であって、
天井面と平行になるように設けられた基板と、前記基板上に環状に配置された複数の発光素子とを有する発光モジュールと、前記発光モジュールを収容する筐体と、前記発光モジュールに対して天井とは反対側に配置された導光板と、天井とは反対側に、前記導光板を覆うように取り付けられ、前記導光板から出射された光を拡散する拡散カバーとを備え、
前記筐体の天井面に対面する側の面板の一部に、前記筐体が天井に取着された状態において前記埋込穴に没入する冠状部が設けられ、
前記冠状部の内部空間に、前記発光モジュールが配置され、天井とは反対側において前記発光モジュールを覆う状態で前記導光板が配置され、
前記導光板は、前記発光素子から出射された光が入射する入射面と前記入射面から入射した光を反射させる反射面とを有する導入部分と、前記導入部分と連続しており、前記反射面で反射した光を出射させる出射面を有する出射部分とを備え、
前記導入部分は、前記複数の発光素子からなる環に沿って環状に形成され、
前記出射部分は、前記導入部分の環内側に位置する環内出射部分と、前記導入部分の環外側に位置する環外出射部分とで構成され、
前記筐体が天井に取着された状態において、前記筐体のうちの前記冠状部を除いた残部は、天井面よりも下方に位置し、前記残部の外周縁部は、前記埋込穴よりも外側へ張り出しており、
前記導光板のうち少なくとも前記出射部分は、前記残部の少なくとも一部に配置されており、
前記出射部分の少なくとも一部は、前記残部の前記外周縁部に配置されている
ことを特徴とする照明装置。 A lighting device for wear take utilizing the embedding hole formed in ceiling,
A light emitting module having a substrate provided parallel to the ceiling surface, a plurality of light emitting elements arranged in an annular shape on the substrate, a housing for housing the light emitting module, and the light emitting module A light guide plate disposed on the opposite side of the ceiling, and a diffusion cover attached to the opposite side of the ceiling so as to cover the light guide plate and diffusing light emitted from the light guide plate,
Wherein a portion of the housing side of the face plate facing the ceiling surface of the coronary portion is provided with the casing is retracted into the buried well in mounted state on the ceiling,
In the inner space of the crown-shaped part, the light emitting module is arranged, and the light guide plate is arranged in a state of covering the light emitting module on the side opposite to the ceiling ,
The light guide plate is continuous with the introduction portion having an incident surface on which light emitted from the light emitting element is incident and a reflection surface that reflects light incident from the incident surface, and the reflection surface. And an exit portion having an exit surface for emitting the light reflected by
The introduction portion is formed in a ring shape along a ring composed of the plurality of light emitting elements,
The emission part is composed of an in-ring emission part located inside the ring of the introduction part and an out-of-ring emission part located outside the ring of the introduction part,
In the state where the casing is attached to the ceiling, the remaining portion of the casing excluding the crown-shaped portion is located below the ceiling surface, and the outer peripheral edge portion of the remaining portion is from the embedded hole. Projecting outwards,
At least the emission part of the light guide plate is disposed in at least a part of the remaining part,
At least a part of the emission part is disposed on the outer peripheral edge of the remaining part . 前記発光素子で発生した熱を装置外部へ放熱するための放熱部材をさらに備え、
前記放熱部材は、前記冠状部の上面に取り付けられ、前記筐体が天井に取着された状態において前記埋込穴に没入している
ことを特徴とする請求項１に記載の照明装置。 A heat radiating member for radiating heat generated in the light emitting element to the outside of the device;
The heat dissipation member is mounted on the upper surface of the crown, the lighting device according to claim 1, wherein the housing is characterized in that it sinks into the buried well in mounted state on the ceiling. 前記発光素子から出射された光を反射して前記導光板に入射させる反射面を有する反射部材をさらに備える
ことを特徴とする請求項１に記載の照明装置。 The illuminating device according to claim 1, further comprising a reflecting member having a reflecting surface that reflects light emitted from the light emitting element and makes the light incident on the light guide plate. 前記反射部材は、前記反射面と前記導光板の裏側の面とが対向した状態で、その少なくとも一部が前記冠状部の内部空間に配置される
ことを特徴とする請求項３に記載の照明装置。 4. The illumination according to claim 3 , wherein at least a part of the reflection member is disposed in an internal space of the crown-shaped portion in a state where the reflection surface and a surface on the back side of the light guide plate face each other. apparatus.
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CN201390000690.XU CN204534162U (en) 2012-11-05 2013-10-25 Lighting device
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