JP2016167469A - Luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a luminance ratio of a light source portion of a luminaire to a luminaire installation surface, such as a ceiling, small.SOLUTION: A luminaire 10 includes: an LED 11; a luminaire body 12; and a cover 13. The luminaire body 12 has: an attachment surface 21 attached to a luminaire installation surface 20 such as a ceiling; an emission surface 22 which emits light radiated from the LED 11; and an inclined side surface 23 including at least one part inclining to the inner side from the attachment surface 21 to the emission surface 22. The cover 13 is installed so as to cover the emission surface 22 of the luminaire body 12 and diffuses the light emitted from the emission surface 22. The cover 13 has a protruding part 31 which protrudes to the outer side of an extension surface 24 of the at least one part (the portion inclining to the inner side) on the inclined side surface 23 of the luminaire body 12.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a lighting fixture.

  Many lighting fixtures using LEDs as light sources are provided (see, for example, Patent Document 1).

JP 2009-181813 A US Pat. No. 3,549,879

  In a luminaire using an LED as a light source, the LED light-emitting portion has high brightness and looks dazzling. On the other hand, since LED has high directivity, for example, in a direct-mounted lighting fixture that irradiates a vertical direction with respect to a fixture installation surface such as a ceiling, the light emitted from the LED does not hit the side or fixture installation surface of the lighting fixture and is dark appear. When the LED light emitting unit and the side surface of the direct-mounted illumination device or the device installation surface are in the field of view at the same time, there is a problem that these luminance ratios are large and glare is felt.

  An object of the present invention is, for example, to reduce the luminance ratio between a light source portion of a lighting fixture and a fixture installation surface such as a ceiling.

A lighting apparatus according to one aspect of the present invention includes:
It is a lighting fixture attached to the fixture installation surface of the ceiling,
An attachment surface attached to the appliance installation surface; a bottom surface parallel to the attachment surface; an inclined side surface that exists from the attachment surface to the bottom surface, and that is inclined at least partially inward from the attachment surface toward the bottom surface; An instrument body having:
A light source that emits light in a direction perpendicular to the mounting surface of the instrument body;
A cover that swells from the bottom surface of the instrument body to the outside of the instrument body and diffuses light emitted from the light source, the cross-sectional shape including a curved part, and one of the light emitted from the light source by the curved part. And a cover that diffuses the part to reach the inclined side surface of the instrument body.

  According to the present invention, the cover whose cross-sectional shape includes the curved portion diffuses a part of the light emitted from the light source by the curved portion and reaches the inclined side surface of the instrument body. When the light strikes the inclined side surface of the fixture body and the light further strikes the fixture installation surface such as the ceiling, the luminance ratio between the light source portion of the lighting fixture and the fixture installation surface becomes small.

1 is a perspective view of a lighting fixture according to Embodiment 1. FIG. It is the side view, top view, and front view of the lighting fixture which concerns on Embodiment 1. FIG. 2 is an exploded perspective view of the lighting fixture according to Embodiment 1. FIG. It is a side view of the installation state of the lighting fixture which concerns on Embodiment 1. FIG. It is a side view of the lighting fixture which concerns on Embodiment 1, and shows the diffused light from a cover. 6 is a perspective view of a lighting fixture according to Embodiment 2. FIG. 6 is an exploded perspective view of a lighting apparatus according to Embodiment 2. FIG. It is a side view of the installation state of the lighting fixture which concerns on Embodiment 2. FIG. It is a side view of the installation state of the lighting fixture which concerns on Embodiment 3. FIG. It is a side view of the lighting fixture which concerns on Embodiment 3, and shows the diffused light from a cover.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

Embodiment 1 FIG.
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 luminaire 10. FIG. 3 is an exploded perspective view of the lighting fixture 10. FIG. 4 is a side view of the installation state of the lighting fixture 10.

  In this Embodiment, the lighting fixture 10 is attached to fixture installation surfaces 20 (refer FIG. 4), such as a ceiling. The lighting fixture 10 includes a plurality of LEDs 11 as a light source that emits light, and also includes a fixture body 12 that houses the LEDs 11 and a cover 13 that diffuses light.

  As shown in the plan view on the upper right of FIG. 2 (the right half is a state where the cover 13 is attached, and the left half is a state where the cover 13 is removed), in the present embodiment, the LED 11 is substantially inside the instrument body 12. They are arranged in a straight line. In addition, LED11 may be arranged so that another shape may be made. For example, the instrument body 12 may be formed in a circular shape in plan view, and the LEDs 11 may be arranged in a ring shape inside the instrument body 12. For example, you may arrange | position LED11 at random.

  The instrument main body 12 has an attachment surface 21 attached to the instrument installation surface 20, an emission surface 22 that emits light emitted from the LED 11, and an inclination that at least a part is inclined inward from the attachment surface 21 toward the emission surface 22. And a side surface 23. As shown in FIG. 4, in the present embodiment, the attachment surface 21, the emission surface 22, and the surface to which the LED 11 is attached are parallel to each other, but are not necessarily parallel. In addition, the inclined side surface 23 has a substantially vertical upper portion, but may be inclined in the same manner as other portions. That is, the entire inclined side surface 23 may be inclined inward (the inclination angle with respect to the device installation surface 20 may be larger than 0 ° and smaller than 90 °, for example, 60 °). Further, the inclined side surface 23 extends along the arrangement direction of the LEDs 11, but may extend along a direction orthogonal to the arrangement direction of the LEDs 11. That is, the inclined side surface 23 may be in either the longitudinal direction or the short direction of the instrument main body 12 and may exist in both directions.

  A plurality of reflectors 14 that reflect light emitted from the LEDs 11 are provided inside the instrument body 12, and each reflector 14 has a one-to-one correspondence with the LEDs 11. The light exit side opening of each reflector 14 forms an exit surface 22 of the instrument body 12. In addition, the reflector 14 may be provided so that one may respond | correspond to several LED11. Although not shown, a power supply device that supplies power to the LED 11 and electrical components such as a power supply terminal block are further mounted inside the instrument body 12.

  For example, the instrument main body 12 is formed into a rectangular parallelepiped having a substantially trapezoidal side surface by bending or combining sheet metals. In the present embodiment, as shown in FIG. 4, the cross-sectional shape of the instrument body 12 is such that the upper bottom portion is the emission surface 22, the lower bottom portion is the mounting surface 21, and the oblique sides on both the left and right sides are the inclined side surfaces 23. It has a substantially trapezoidal shape.

  The cover 13 is installed so as to cover the emission surface 22 of the instrument body 12 and diffuses light emitted from the emission surface 22. The cover 13 is outside the extended surface 24 (side surface outer surface composed of an inclined surface extending from the surface to which the LED 11 is attached) of at least a part (the portion inclined inward) of the inclined side surface 23 of the instrument body 12 ( It has the convex part 31 (shaded part of FIG. 4) which protrudes out of an instrument. In the present embodiment, since the inclined side surface 23 of the instrument main body 12 extends along the arrangement direction of the LEDs 11, the convex portion 31 of the cover 13 protrudes outward in a direction orthogonal to the arrangement direction of the LEDs 11. ing.

  For example, the cover 13 has a substantially bowl-shaped 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 the cover 13 is substantially bowl-shaped with the curved portion as at least a part of the outer surface of the convex portion 31.

  For example, the cover 13 is formed of a synthetic resin material having diffuse translucency such as milky white acrylic. The cover 13 has fine irregularities on the inner and outer surfaces. For example, when the transmittance is 70%, light that is guided and diffusely reflected is about 30%.

  In the present embodiment, the LED 11 that emits light in a direction substantially perpendicular to the mounting surface 21 of the instrument main body 12 is used as the light source, but the cover 13 has an extension surface 24 of the inclined side surface 23 of the instrument main body 12. Since the convex portion 31 protruding outward is also provided, the light emitted from the LED 11 also strikes 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 further strikes the instrument installation surface 20. Thereby, the luminance ratio of the light source part of the lighting fixture 10 and the fixture installation surface 20 becomes small.

  FIG. 5 is a side view of the luminaire 10 and illustrates diffused light from the cover 13.

  As shown in FIG. 5, the cover 13 is attached to the fixture main body 12 so as to cover the front surface (light emitting surface) of the LED 11, so that the light emitted from the LED 11 does not directly enter the viewer's field of view and the luminance is reduced. Further, a part of the light emitted from the LED 11 is guided through the thickness of the cover 13 or diffusely reflected inside the cover 13, and then diffused by the convex portion 31, and the inclined side surface 23 of the instrument main body 12 and Since it reaches the appliance installation surface 20, the luminance ratio between the LED 11 light emitting section and its surroundings becomes small.

  Light that is guided and diffusely reflected when the inner surface 32 of the cover 13 and the outer surface 33 of the cover 13 facing the surface on which the LED 11 is mounted are smooth and the outer surface 34 on the side surface side of the cover 13 is finely uneven. Can be efficiently diffused in the direction of the appliance installation surface 20, so that the luminance ratio between the LED 11 light emitting portion and its surroundings can be further reduced.

  As described above, in the present embodiment, in the irradiation direction of the plurality of LEDs 11 that irradiate the mounting surface 21 of the instrument main body 12 in the vertical direction, a convex shape is formed outside the instrument more than the side external surface of the cross section of the instrument main body 12. Since the cover 13 having diffuse translucency is provided, a part of the light irradiated from the light source can be diffused to the side surface of the lighting fixture 10 or the fixture installation surface 20. Thereby, glare can be reduced, for example, the lighting fixture 10 from which a feeling of brightness is obtained can be provided in an indoor ceiling.

  In the present embodiment, since the side surface of the instrument body 12 is not a vertical surface but an inclined side surface 23, 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 outward from the end portion 25 on the bottom surface of the instrument body 12. Therefore, the lighting fixture 10 with high designability can be provided. In addition, if the convex part 31 protrudes outside the extended surface 24 of the inclined side surface 23 of the instrument main body 12, the side surface is not a vertical surface, but inside the end portion 25 on the bottom surface of the instrument main body 12. It may be inclined or curved.

Embodiment 2. FIG.
In the present embodiment, differences from the first embodiment will be mainly described.

  FIG. 6 is a perspective view of the 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 luminaire 10 in an installed state.

  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 on the bottom surface of the instrument body 12. That is, in the present embodiment, the convex portion 31 of the cover 13 protrudes outside the end portion 25 on the bottom surface of the instrument body 12. Thereby, compared with Embodiment 1, more light can be diffused to the side surface of the lighting fixture 10 or the fixture installation surface 20.

Embodiment 3 FIG.
In the present embodiment, differences from the first embodiment will be mainly described.

  FIG. 9 is a side view of the installation state of the lighting fixture 10.

  In the present embodiment, the instrument body 12 has a square cross section. Therefore, the side surface 26 of the instrument main body 12 is not an inclined side surface 23 but a vertical surface.

  In the present embodiment, the lighting fixture 10 has a rectangular parallelepiped fixture main body 12 whose side shape is a substantially square 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 it. A cover 13 attached to the main body 12 is provided. In addition, the side surface shape of the instrument main body 12 may be a rectangle, for example.

  The appliance main body 12 has an attachment surface 21 attached to 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.

  As in the second embodiment, the cover 13 has an oval side cross-sectional shape. Both end portions (convex portions 31) of the cover 13 having an arcuate shape project outward from the extension surface 24 of the side surface 26 of the instrument body 12.

  FIG. 10 is a side view of the luminaire 10 and illustrates diffused light from the cover 13.

  As shown in FIG. 10, since the cover 13 is attached to the fixture main body 12 so as to cover the front surface (light emitting surface) of the LED 11, the light emitted from the LED 11 does not directly enter the viewer's field of view and the brightness is reduced. Further, a part of the light emitted from the LED 11 is guided through the thickness of the cover 13 or diffusely reflected inside the cover 13, and then diffused by the convex portion 31, and the inclined side surface 23 of the instrument main body 12 and Since it reaches the appliance installation surface 20, the luminance ratio between the LED 11 light emitting unit and its surroundings becomes small.

  When the inner surface 32 and the outer surface 33 of the cover 13 are smooth, and when the outer surface 34 of the convex portion 31 of the cover 13 is finely uneven, the light that is guided and diffusely reflected can be efficiently diffused in the direction of the instrument installation surface 20. Therefore, the luminance ratio between the LED 11 light emitting unit and its surroundings can be further reduced.

  DESCRIPTION OF SYMBOLS 10 Lighting fixture, 11 LED, 12 Appliance main body, 13 Cover, 14 Reflector, 20 Appliance installation surface, 21 Mounting surface, 22 Output surface, 23 Inclined side surface, 24 Extension surface, 25 End part, 26 Side surface, 31 Convex part, 32 Inner surface, 33, 34 Outer surface.

Claims (6)

It is a lighting fixture attached to the fixture installation surface of the ceiling,
An attachment surface attached to the appliance installation surface; a bottom surface parallel to the attachment surface; an inclined side surface that exists from the attachment surface to the bottom surface, and that is inclined at least partially inward from the attachment surface toward the bottom surface; An instrument body having:
A light source that emits light in a direction perpendicular to the mounting surface of the instrument body;
A cover that swells from the bottom surface of the instrument body to the outside of the instrument body and diffuses light emitted from the light source, the cross-sectional shape including a curved part, and one of the light emitted from the light source by the curved part. And a cover that diffuses the part and reaches the inclined side surface of the fixture body.   The lighting fixture according to claim 1, wherein the inclined side surface of the fixture body is exposed in a direction perpendicular to the mounting surface of the fixture body.   The lighting fixture according to claim 1, wherein the fixture main body is wider than the cover.   The lighting device according to any one of claims 1 to 3, wherein the curved portion of the cover is within a range of a bottom surface of the device body when viewed in a direction perpendicular to a mounting surface of the device body.   The lighting fixture according to any one of claims 1 to 4, wherein a power terminal block is mounted on the fixture body. The at least part of the inclined side surface of the instrument body includes a lower end portion of the inclined side surface of the instrument body,
The said cover is a lighting fixture of any one of Claim 1 to 5 which covers from one side of the both ends connected with the lower end part of the said inclined side surface of the bottom face of the said apparatus main body to the other.

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