JP6723335B2

JP6723335B2 - lighting equipment

Info

Publication number: JP6723335B2
Application number: JP2018237402A
Authority: JP
Inventors: 昌幸神野
Original assignee: Mitsubishi Electric Corp; Mitsubishi Electric Lighting Corp
Current assignee: Mitsubishi Electric Corp; Mitsubishi Electric Lighting Corp
Priority date: 2018-12-19
Filing date: 2018-12-19
Publication date: 2020-07-15
Anticipated expiration: 2030-06-08
Also published as: JP2019046808A

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.

ＬＥＤを光源とする照明器具は、数多く提供されている（例えば、特許文献１参照）。 Many lighting fixtures using LEDs as a light source are provided (for example, see Patent Document 1).

特開２００９−１８１８１３号公報JP, 2009-181813, A 米国特許第３５４９８７９号明細書U.S. Pat. No. 3,549,879 実開昭５６−１３１６９１号公報Japanese Utility Model Publication No. 56-131691 特開平１０−１７２３１２号公報JP, 10-172312, A 実開昭５７−９４１０６号公報Japanese Utility Model Publication 57-94106 特開２００９−４３２８号公報JP, 2009-4328, A 特許第４３６５８８４号公報Japanese Patent No. 4365884 特開２０１０−００３６８３号公報JP, 2010-003683, A 米国特許出願公開第２０１０／０００８０８５号明細書U.S. Patent Application Publication No. 2010/0008085 特開２０１０−１１８２７７号公報JP, 2010-118277, A

ＬＥＤを光源とする照明器具では、ＬＥＤ発光部は輝度が高く、まぶしく見える。一方、ＬＥＤは指向性が強いため、例えば天井等の器具設置面に対し垂直方向を照射する直付型照明器具では、ＬＥＤから照射された光が照明器具の側面や器具設置面に当たらず暗く見える。ＬＥＤ発光部と直付型照明器具の側面や器具設置面が同時に視野に入る場合、これらの輝度比が大きく、グレアを感じるという課題があった。 In a lighting device using an LED as a light source, the LED light emitting portion has high brightness and looks dazzling. On the other hand, since the LED has a strong directivity, in a direct-mounted lighting fixture that irradiates the fixture installation surface such as a ceiling in a vertical direction, the light emitted from the LED does not hit the side surface of the lighting fixture or the fixture installation surface and is dark. appear. When the LED light emitting section and the side surface of the direct-mounted illuminating device or the device installation surface are in the visual field at the same time, there is a problem that the luminance ratio between them is large and glare is felt.

本発明は、光源からの光を側面に拡散させることができる照明器具を提供することを目的とする。 It is an object of the present invention to provide a lighting device capable of diffusing light from a light source to the side surface.

本発明の一の態様に係る照明器具は、
天井の器具設置面に取り付けられる照明器具であって、
前記器具設置面に取り付けられる取付面と、前記取付面に平行な底面と、前記取付面から前記底面にわたって存在し、前記取付面から前記底面に向かつて傾斜する傾斜側面とを有する器具本体と、
前記器具本体の前記取付面に対して垂直方向に光を放射する光源と、
前記器具本体の底面から前記器具本体の外側に膨らみ、前記光源から放射される光を拡散させるカバーであって、前記傾斜側面の延長面よりも突出している凸部を有するカバーと、
を備え、
前記器具本体の前記取付面に対して垂直方向に見たときに、前記カバーの端部と前記傾斜側面の端部が重なっている。 A lighting fixture according to one aspect of the present invention,
A lighting fixture that is attached to a ceiling fixture installation surface,
An instrument main body having an attachment surface attached to the instrument installation surface, a bottom surface parallel to the attachment surface, and an inclined side surface existing from the attachment surface to the bottom surface and inclined toward the bottom surface from the attachment surface,
A light source that emits light in a direction perpendicular to the mounting surface of the instrument body,
A cover that bulges from the bottom surface of the instrument body to the outside of the instrument body and diffuses the light emitted from the light source, the cover having a convex portion projecting from an extended surface of the inclined side surface,
Equipped with
When viewed in a direction perpendicular to the mounting surface of the instrument body, the end portion of the cover and the end portion of the inclined side surface overlap each other.

本発明によれば、器具本体の側面が垂直な面ではなく傾斜側面となっているため、カバーの凸部を器具本体の底面の端部より外側に出っ張らせなくても光源からの光を照明器具の側面や器具設置面に拡散させることができる。 According to the present invention, since the side surface of the instrument body is not the vertical surface but the inclined side surface, the light from the light source is illuminated even if the convex portion of the cover does not project outside the end portion of the bottom surface of the instrument body. It can be diffused to the side of the device or the installation surface.

実施の形態１に係る照明器具の斜視図である。FIG. 3 is a perspective view of the lighting fixture according to the first embodiment. 実施の形態１に係る照明器具の側面図、平面図、正面図である。FIG. 3 is a side view, a plan view, and a front view of the lighting fixture according to the first embodiment. 実施の形態１に係る照明器具の分解斜視図である。FIG. 3 is an exploded perspective view of the lighting fixture according to the first embodiment. 実施の形態１に係る照明器具の設置状態の側面図である。FIG. 3 is a side view of an installed state of the lighting fixture according to the first embodiment. 実施の形態１に係る照明器具の側面図であり、カバーからの拡散光を図示したものである。It is a side view of the lighting fixture which concerns on Embodiment 1, and is what illustrated the diffused light from a cover. 実施の形態２に係る照明器具の斜視図である。It is a perspective view of the lighting fixture which concerns on Embodiment 2. 実施の形態２に係る照明器具の分解斜視図である。FIG. 6 is an exploded perspective view of the lighting fixture according to the second embodiment. 実施の形態２に係る照明器具の設置状態の側面図である。FIG. 7 is a side view of an installed state of the lighting fixture according to the second embodiment. 実施の形態３に係る照明器具の設置状態の側面図である。FIG. 9 is a side view of an installed state of the lighting equipment according to the third embodiment. 実施の形態３に係る照明器具の側面図であり、カバーからの拡散光を図示したものである。It is a side view of the lighting fixture which concerns on Embodiment 3, and is what showed the diffused light from a cover.

以下、本発明の実施の形態について、図を用いて説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

実施の形態１．
図１は、本実施の形態に係る照明器具１０の斜視図である。図２は、照明器具１０の側面図（左上）、平面図（右上）、正面図（右下）である。図３は、照明器具１０の分解斜視図である。図４は、照明器具１０の設置状態の側面図である。 Embodiment 1.
FIG. 1 is a perspective view of a lighting fixture 10 according to the present embodiment. FIG. 2 is a side view (upper left), a plan view (upper right), and a front view (lower right) of the lighting fixture 10. FIG. 3 is an exploded perspective view of the lighting fixture 10. FIG. 4 is a side view of the installed state of the lighting fixture 10.

本実施の形態において、照明器具１０は、天井等の器具設置面２０（図４参照）に取り付けられるものである。照明器具１０は、光を放射する光源としてＬＥＤ１１を複数備えるほか、ＬＥＤ１１を収容する器具本体１２、及び、光を拡散させるカバー１３を備える。 In the present embodiment, the lighting fixture 10 is attached to a fixture installation surface 20 (see FIG. 4) such as a ceiling. The lighting fixture 10 includes a plurality of LEDs 11 as a light source that emits light, a fixture body 12 that houses the LEDs 11, and a cover 13 that diffuses light.

図２右上の平面図（右半分はカバー１３を取り付けた状態、左半分はカバー１３を取り外した状態である）に示すように、本実施の形態において、ＬＥＤ１１は、器具本体１２の内側に略直線状に配列されている。なお、ＬＥＤ１１は、他の形状をなすように配列されていてもよい。例えば器具本体１２を平面視円形状に形成して、その器具本体１２の内側にＬＥＤ１１をリング状に配置してもよい。また、例えばＬＥＤ１１をランダムに配置してもよい。 In the present embodiment, as shown in the plan view of the upper right of FIG. 2 (the right half is in a state where the cover 13 is attached, the left half is in a state where the cover 13 is removed), the LED 11 is substantially inside the instrument body 12. They are arranged in a straight line. The LEDs 11 may be arranged in other shapes. For example, the device body 12 may be formed in a circular shape in plan view, and the LEDs 11 may be arranged inside the device body 12 in a ring shape. Further, for example, the LEDs 11 may be arranged randomly.

器具本体１２は、器具設置面２０に取り付けられる取付面２１と、ＬＥＤ１１から放射される光を出射する出射面２２と、取付面２１から出射面２２に向かって少なくとも一部が内側に傾斜する傾斜側面２３とを有する。図４に示すように、本実施の形態において、取付面２１、出射面２２、ＬＥＤ１１が取り付けられる面は、互いに平行であるが、必ずしも平行でなくてよい。また、傾斜側面２３は、上部が略垂直な面になっているが、他の部分と同様に傾斜していてもよい。即ち、傾斜側面２３は、全体が内側に傾斜していてもよい（器具設置面２０に対する傾斜角は、０°より大きく９０°より小さければよく、例えば６０°等となる）。また、傾斜側面２３は、ＬＥＤ１１の配列方向に沿って延在しているが、ＬＥＤ１１の配列方向と直交する方向に沿って延在していてもよい。即ち、傾斜側面２３は、器具本体１２の長手方向及び短手方向のどちらにあってもよく、両方向に存在していてもよい。 The device body 12 has a mounting surface 21 that is mounted on the device installation surface 20, an emission surface 22 that emits light emitted from the LED 11, and an inclination in which at least a part of the emission surface 22 inclines inward from the mounting surface 21 toward the emission surface 22. And a side surface 23. As shown in FIG. 4, in the present embodiment, the mounting surface 21, the emission surface 22, and the surface on which the LED 11 are mounted are parallel to each other, but they do not necessarily have to be parallel. Further, although the upper portion of the inclined side surface 23 is a substantially vertical surface, it may be inclined similarly to the other portions. That is, the entire inclined side surface 23 may be inclined inward (the inclination angle with respect to the instrument installation surface 20 may be larger than 0° and smaller than 90°, for example, 60°). Moreover, although the inclined side surface 23 extends along the arrangement direction of the LEDs 11, it may extend along the direction orthogonal to the arrangement direction of the LEDs 11. That is, the inclined side surface 23 may be present in either the longitudinal direction or the lateral direction of the instrument body 12, or may be present in both directions.

器具本体１２の内側には、ＬＥＤ１１から放射される光を反射するリフレクタ１４が複数設けられており、各リフレクタ１４はＬＥＤ１１と１対１で対応している。各リフレクタ１４の出光側開口部は、器具本体１２の出射面２２を形成している。なお、リフレクタ１４は、１つが複数のＬＥＤ１１に対応するように設けられていてもよい。図示しないが、器具本体１２の内側には、さらに、ＬＥＤ１１に電力を供給する電源装置や、電源端子台等の電装部品が実装される。 A plurality of reflectors 14 that reflect the light emitted from the LEDs 11 are provided inside the instrument body 12, and each reflector 14 corresponds to the LEDs 11 in a one-to-one correspondence. The light emitting side opening of each reflector 14 forms the light emitting surface 22 of the instrument body 12. In addition, one reflector 14 may be provided so as to correspond to a plurality of LEDs 11. Although not shown, a power supply device for supplying electric power to the LED 11 and an electric component such as a power supply terminal block are further mounted inside the instrument body 12.

例えば、器具本体１２は、板金を折り曲げあるいは組み合わせて、側面形状が略台形状をなす直方体に形成される。本実施の形態では、図４に示すように、器具本体１２の断面形状が、上底部分を出射面２２とし、下底部分を取付面２１とし、左右両側の斜辺部分を傾斜側面２３とする略台形状になっている。 For example, the instrument body 12 is formed by bending or combining sheet metals to form a rectangular parallelepiped whose side surface has a substantially trapezoidal shape. In the present embodiment, as shown in FIG. 4, the instrument body 12 has a cross-sectional shape in which the upper bottom portion is the emitting surface 22, the lower bottom portion is the mounting surface 21, and the oblique sides on the left and right sides are the inclined side surfaces 23. It has a substantially trapezoidal shape.

カバー１３は、器具本体１２の出射面２２を覆うように設置され、出射面２２から出射される光を拡散させる。カバー１３は、器具本体１２の傾斜側面２３の上記少なくとも一部（内側に傾斜している部分）の延長面２４（ＬＥＤ１１が取り付けられた面から広がる傾斜面からなる側面外形面）よりも外側（器具外）に突出する凸部３１（図４の斜線部）を有する。本実施の形態では、器具本体１２の傾斜側面２３がＬＥＤ１１の配列方向に沿って延在しているため、カバー１３の凸部３１は、ＬＥＤ１１の配列方向と直交する方向に向かって外側に突出している。 The cover 13 is installed so as to cover the emission surface 22 of the instrument body 12, and diffuses the light emitted from the emission surface 22. The cover 13 is outside (at least part of the inclined side surface 23 of the instrument body 12) (exterior side surface formed by an inclined surface extending from the surface on which the LED 11 is attached) of the extended surface 24 (the portion inclined to the inside). It has a convex portion 31 (outlined portion in FIG. 4) protruding to the outside of the device. In the present embodiment, since the inclined side surface 23 of the device body 12 extends along the arrangement direction of the LEDs 11, the convex portion 31 of the cover 13 protrudes outward in the direction orthogonal to the arrangement direction of the LEDs 11. ing.

例えば、カバー１３は、側断面形状が略蒲鉾形状をなしており、器具本体１２に取り付けられる複数のＬＥＤ１１の前面に取り付けられる。本実施の形態では、図４に示すように、カバー１３の断面形状が、湾曲部分を凸部３１の外表面の少なくとも一部とする略蒲鉾状になっている。 For example, the cover 13 has a substantially semi-cylindrical side cross-sectional shape, and is attached to the front surface of the plurality of LEDs 11 attached to the instrument body 12. In the present embodiment, as shown in FIG. 4, the cross-sectional shape of cover 13 is a substantially semi-cylindrical shape with the curved portion serving as at least a part of the outer surface of convex portion 31.

例えば、カバー１３は、乳白アクリル等の拡散透光性を有する合成樹脂材料で形成される。カバー１３は、内外表面が細かく凹凸加工されており、例えば透過率が７０％の場合、導光及び乱反射する光は約３０％である。 For example, the cover 13 is formed of a synthetic resin material having a diffuse translucency such as opalescent acrylic. The cover 13 has finely textured inner and outer surfaces. For example, when the transmittance is 70%, the light guided and diffusely reflected is about 30%.

本実施の形態では、光源として、器具本体１２の取付面２１に対して略垂直方向に光を放射するＬＥＤ１１を用いているが、カバー１３に、器具本体１２の傾斜側面２３の延長面２４よりも外側に突出する凸部３１を設けているため、ＬＥＤ１１から放射される光が器具本体１２の傾斜側面２３にも当たる。また、器具本体１２の傾斜側面２３に当たって反射した光がさらに器具設置面２０にも当たる。これにより、照明器具１０の光源部分と器具設置面２０との輝度比が小さくなる。 In the present embodiment, the LED 11 that emits light in a direction substantially perpendicular to the mounting surface 21 of the instrument body 12 is used as the light source. However, the cover 13 is extended from the extension surface 24 of the inclined side surface 23 of the instrument body 12. Also, since the convex portion 31 protruding outward is provided, the light emitted from the LED 11 also hits the inclined side surface 23 of the instrument body 12. Further, the light reflected by the inclined side surface 23 of the instrument body 12 also strikes the instrument installation surface 20. As a result, the luminance ratio between the light source portion of the lighting fixture 10 and the fixture installation surface 20 is reduced.

図５は、照明器具１０の側面図であり、カバー１３からの拡散光を図示したものである。 FIG. 5 is a side view of the lighting fixture 10 and illustrates diffused light from the cover 13.

図５に示すように、カバー１３は、ＬＥＤ１１の前面（発光面）を覆うように器具本体１２に取り付けられるので、ＬＥＤ１１が発する光が直接看者の視野に入らず、輝度が低減される。また、ＬＥＤ１１から放射された光の一部は、カバー１３の板厚内を導光したり、カバー１３内部で乱反射したりした後に、凸部３１で拡散し、器具本体１２の傾斜側面２３及び器具設置面２０に達するため、ＬＥＤ１１発光部とその周囲との輝度比が小さくなる。 As shown in FIG. 5, since the cover 13 is attached to the instrument body 12 so as to cover the front surface (light emitting surface) of the LED 11, the light emitted by the LED 11 does not directly enter the field of view of the viewer, and the brightness is reduced. In addition, a part of the light emitted from the LED 11 is guided within the plate thickness of the cover 13 or diffusely reflected inside the cover 13, and then diffuses at the convex portion 31, and the inclined side surface 23 of the instrument body 12 and Since it reaches the fixture installation surface 20, the luminance ratio between the LED 11 light emitting part and its surroundings becomes small.

カバー１３の内表面３２と、ＬＥＤ１１が取り付けられた面に対向するカバー１３の外表面３３が平滑で、カバー１３の側面側の外表面３４に細かい凹凸加工をした場合、導光及び乱反射する光を器具設置面２０方向に効率的に拡散できるため、ＬＥＤ１１発光部とその周囲との輝度比をより小さくすることができる。 When the inner surface 32 of the cover 13 and the outer surface 33 of the cover 13 facing the surface on which the LEDs 11 are attached are smooth, and the outer surface 34 on the side surface side of the cover 13 is finely roughened, light that is guided and diffusely reflected. Since the light can be efficiently diffused in the direction of the equipment installation surface 20, it is possible to further reduce the luminance ratio between the LED 11 light emitting portion and its surroundings.

以上のように、本実施の形態では、器具本体１２の取付面２１に対して垂直方向を照射する複数のＬＥＤ１１の照射方向に、器具本体１２の断面の側面外形面よりも器具外に凸形状である拡散透光性を有するカバー１３が設けられているため、光源より照射された光の一部を照明器具１０の側面や器具設置面２０に拡散させることができる。これにより、グレアが軽減でき、例えば室内天井に明るさ感が得られる照明器具１０が提供できる。 As described above, in the present embodiment, in the irradiation direction of the plurality of LEDs 11 that irradiate the attachment surface 21 of the device body 12 in the vertical direction, the convex shape is formed outside the device as compared to the side surface of the cross section of the device body 12. Since the cover 13 having the diffuse translucency is provided, part of the light emitted from the light source can be diffused to the side surface of the lighting fixture 10 or the fixture installation surface 20. As a result, glare can be reduced and, for example, the lighting fixture 10 that provides a sense of brightness on the indoor ceiling can be provided.

また、本実施の形態では、器具本体１２の側面が垂直な面ではなく、傾斜側面２３となっているため、図４及び図５に示すように、カバー１３の凸部３１の側面、即ち、外表面３４を垂直な面としても、ＬＥＤ１１からの光を照明器具１０の側面や器具設置面２０に拡散させることができる。つまり、カバー１３の凸部３１を器具本体１２の底面の端部２５より外側に出っ張らせる必要がない。そのため、意匠性の高い照明器具１０が提供できる。なお、凸部３１は、器具本体１２の傾斜側面２３の延長面２４よりも外側に突出しているのであれば、その側面が垂直な面ではなく、器具本体１２の底面の端部２５より内側に傾斜したり、湾曲したりしていてもよい。 In addition, in the present embodiment, the side surface of the instrument body 12 is not the vertical surface but the inclined side surface 23. Therefore, as shown in FIGS. 4 and 5, the side surface of the convex portion 31 of the cover 13, that is, Even if the outer surface 34 is a vertical surface, the light from the LED 11 can be diffused to the side surface of the lighting fixture 10 or the fixture installation surface 20. That is, it is not necessary to project the convex portion 31 of the cover 13 outside the end portion 25 of the bottom surface of the instrument body 12. Therefore, the luminaire 10 with high design can be provided. In addition, if the convex portion 31 projects outward from the extension surface 24 of the inclined side surface 23 of the instrument body 12, the side surface is not a vertical surface, and is located inside the end portion 25 of the bottom surface of the instrument body 12. It may be inclined or curved.

実施の形態２．
本実施の形態について、主に実施の形態１との差異を説明する。 Embodiment 2.
Differences between the present embodiment and the first embodiment will be mainly described.

図６は、本実施の形態に係る照明器具１０の斜視図である。図７は、照明器具１０の分解斜視図である。図８は、照明器具１０の設置状態の側面図である。 FIG. 6 is a perspective view of lighting fixture 10 according to the present embodiment. FIG. 7 is an exploded perspective view of the lighting fixture 10. FIG. 8 is a side view of the installed state of the lighting fixture 10.

本実施の形態では、カバー１３の凸部３１の側面、即ち、外表面３４が垂直な面ではなく、器具本体１２の底面の端部２５より外側に突出している。つまり、本実施の形態では、カバー１３の凸部３１を器具本体１２の底面の端部２５より外側に出っ張らせている。これにより、実施の形態１と比べて、より多くの光を照明器具１０の側面や器具設置面２０に拡散させることができる。 In the present embodiment, the side surface of the convex portion 31 of the cover 13, that is, the outer surface 34 is not a vertical surface, but protrudes outward from the end portion 25 of the bottom surface of the device body 12. That is, in the present embodiment, the convex portion 31 of the cover 13 is projected outward from the end 25 of the bottom surface of the instrument body 12. Thereby, more light can be diffused to the side surface of the lighting fixture 10 or the fixture installation surface 20 as compared with the first embodiment.

実施の形態３．
本実施の形態について、主に実施の形態１との差異を説明する。 Embodiment 3.
Differences between the present embodiment and the first embodiment will be mainly described.

図９は、照明器具１０の設置状態の側面図である。 FIG. 9 is a side view of the installed state of the lighting fixture 10.

本実施の形態では、器具本体１２の断面が四角形状になっている。よって、器具本体１２の側面２６が傾斜側面２３ではなく、垂直な面となっている。 In the present embodiment, the instrument body 12 has a quadrangular cross section. Therefore, the side surface 26 of the instrument body 12 is not the inclined side surface 23 but a vertical surface.

本実施の形態において、照明器具１０は、側面形状が略正方形からなる直方体形状の器具本体１２と、この器具本体１２に取り付けられるＬＥＤ１１と、このＬＥＤ１１の前面（発光面）を覆うように、器具本体１２に取り付けられるカバー１３を備える。なお、器具本体１２の側面形状は、例えば長方形であっても構わない。 In the present embodiment, the lighting fixture 10 includes a fixture main body 12 having a rectangular parallelepiped side surface shape, an LED 11 attached to the fixture main body 12, and a front surface (light emitting surface) of the LED 11 so as to cover the fixture. A cover 13 attached to the main body 12 is provided. The side shape of the instrument body 12 may be rectangular, for example.

器具本体１２は、天井等の器具設置面２０に取り付けられる取付面２１と、ＬＥＤ１１から放射される光を出射する出射面２２と、略平行な２つの側面２６とを有する。 The appliance body 12 has a mounting surface 21 that is mounted on an appliance installation surface 20 such as a ceiling, an emission surface 22 that emits light emitted from the LED 11, and two substantially parallel side surfaces 26.

カバー１３は、実施の形態２と同様に、側断面形状が楕円形となっている。カバー１３の円弧状になる両端部（凸部３１）は、器具本体１２の側面２６の延長面２４から器具外方向に突出する。 Similar to the second embodiment, the cover 13 has an elliptical side sectional shape. Both ends (convex portions 31) of the cover 13 that are arcuate project from the extension surface 24 of the side surface 26 of the device body 12 in the device outward direction.

図１０は、照明器具１０の側面図であり、カバー１３からの拡散光を図示したものである。 FIG. 10 is a side view of the luminaire 10, and illustrates diffused light from the cover 13.

図１０に示すように、カバー１３は、ＬＥＤ１１の前面（発光面）を覆うように器具本体１２に取り付けられるので、ＬＥＤ１１が発する光が直接看者の視野に入らず、輝度が低減される。また、ＬＥＤ１１から放射された光の一部は、カバー１３の板厚内を導光したり、カバー１３内部で乱反射したりした後に、凸部３１で拡散し、器具本体１２の傾斜側面２３及び器具設置面２０に達するため、ＬＥＤ１１発光部とその周囲の輝度比が小さくなる。 As shown in FIG. 10, since the cover 13 is attached to the instrument body 12 so as to cover the front surface (light emitting surface) of the LED 11, the light emitted by the LED 11 does not directly enter the field of view of the viewer, and the brightness is reduced. In addition, a part of the light emitted from the LED 11 is guided within the plate thickness of the cover 13 or diffusely reflected inside the cover 13, and then diffuses at the convex portion 31, and the inclined side surface 23 of the instrument body 12 and Since it reaches the fixture installation surface 20, the luminance ratio of the LED 11 light emitting part and its surroundings becomes small.

カバー１３の内表面３２と外表面３３が平滑で、カバー１３の凸部３１の外表面３４に細かい凹凸加工をした場合、導光及び乱反射する光を器具設置面２０方向に効率的に拡散できるため、ＬＥＤ１１発光部とその周囲の輝度比をより小さくすることができる。 When the inner surface 32 and the outer surface 33 of the cover 13 are smooth and the outer surface 34 of the convex portion 31 of the cover 13 is finely roughened, the light that is guided and diffusely reflected can be efficiently diffused in the device installation surface 20 direction. Therefore, it is possible to further reduce the luminance ratio of the LED 11 light emitting section and its surroundings.

１０照明器具、１１ＬＥＤ、１２器具本体、１３カバー、１４リフレクタ、２０器具設置面、２１取付面、２２出射面、２３傾斜側面、２４延長面、２５
端部、２６側面、３１凸部、３２内表面、３３，３４外表面。 10 Lighting Fixture, 11 LED, 12 Fixture Main Body, 13 Cover, 14 Reflector, 20 Fixture Installation Surface, 21 Attachment Surface, 22 Emission Surface, 23 Inclined Side Surface, 24 Extension Surface, 25
Ends, 26 side surfaces, 31 convex portions, 32 inner surface, 33, 34 outer surface.

Claims

A lighting fixture that is attached to a ceiling fixture installation surface,
Having a mounting surface to be attached to the instrument installation surface, a bottom surface parallel to the mounting surface, present over the bottom surface from said mounting surface and an inclined side surface which is inclined inwardly Tsu suited to the bottom surface from said mounting surface The instrument body,
A light source that emits light in a direction perpendicular to the mounting surface of the instrument body,
A cover that bulges from the bottom surface of the instrument body to the outside of the instrument body and diffuses the light emitted from the light source, the cover having a convex portion projecting from an extended surface of the inclined side surface,
Equipped with
When viewed in a direction perpendicular to the mounting surface of the instrument body, the end portion of the cover and the end portion of the inclined side surface overlap ,
A lighting fixture in which the cover is within the range of the bottom face when viewed in a direction perpendicular to the mounting surface of the fixture body .

The lighting fixture according to claim 1, wherein a side surface of the convex portion of the cover is a surface perpendicular to the bottom surface of the fixture body.

The lighting fixture according to claim 1, wherein a side surface of the convex portion of the cover is inclined inward from an end portion of the bottom surface of the fixture main body.

The lighting fixture according to claim 1, wherein a side surface of the convex portion of the cover is curved inward from an end portion of the bottom surface of the fixture main body.