JP6534069B2 - lighting equipment - Google Patents

Description

  The present invention relates to a luminaire, and more particularly to an embedded luminaire using a light emitting element such as a light emitting diode (LED) as a light source.

  Conventionally, as an embedded lighting apparatus, for example, a ceiling-embedded lighting apparatus which is disposed on a ceiling like a downlight and emits light downward, or is embedded on the ground and is disposed above Underground lighting equipment etc. which irradiate light are known. For example, Patent Document 1 discloses a ceiling-embedded lighting fixture.

  This type of lighting fixture includes an LED light source (light source unit) and a reflector (reflection unit) that reflects light from the LED light source on the inner circumferential surface. Moreover, in order to reduce the glare of the highly directional LED light source, a light transmitting member having diffusivity is disposed on the light emission side of the LED light source.

JP, 2011-210621, A

  However, in the conventional lighting fixture, there is a problem that the luminance of the light transmitting member is high and the user feels dazzling. Moreover, although there exist some which the whole reflecting plate is exposed in the conventional lighting fixture, in such a lighting fixture, the advancing of the stain | pollution | contamination of a reflecting plate is quick and there exists a problem that the fall rate of a maintenance factor is large.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide a luminaire capable of suppressing the luminance and suppressing the decrease in the maintenance rate.

  In order to achieve the above object, one aspect of a lighting fixture according to the present invention is a lighting fixture embedded in an opening of a ceiling, wherein a light source unit and a reflection that reflects light emitted from the light source unit A reflective portion having a surface, and a light transmitting member having a light diffusing property disposed to cover at least a part of the reflective surface, and the outer surface of the light transmitting member protrudes toward the light source portion The light transmitting member has a rotationally symmetric shape, and is configured to be curved except for at least a central portion of the outer surface.

  In one aspect of the lighting apparatus according to the present invention, the light transmitting member is a milky white panel in which a light diffusing material is dispersed, a panel on which a milky white light diffusing film is formed on the surface, or dots on the surface It may be a panel on which a pattern is printed.

  In one aspect of the lighting fixture according to the present invention, the light transmitting member may be curved such that the entire outer surface protrudes toward the light source unit.

  Alternatively, the light transmitting member is configured such that a central portion of the outer surface facing the light source portion is a flat surface, and a peripheral portion of the outer surface around the central portion is a curved surface. It is also good.

  Further, in one aspect of the lighting fixture according to the present invention, the light transmitting member may be disposed so as not to expose the reflecting portion.

  In one aspect of the lighting fixture according to the present invention, the light transmitting member is configured such that the diffusion degree of the central portion facing the light source portion is higher than the diffusion degree of the peripheral portion around the central portion. It may be

  Moreover, in one aspect of the lighting fixture according to the present invention, the light transmitting member may be configured such that the degree of diffusion decreases from the center toward the periphery.

  Further, in one aspect of the lighting fixture according to the present invention, the reflecting portion is formed by an incident port formed so as to surround the light source portion, a reflecting surface that reflects light incident from the incident port, and the reflecting surface. It may be a reflecting plate having an exit from which the reflected light exits.

  Moreover, in one aspect of the lighting fixture according to the present invention, the light transmitting member may be arranged such that the outer peripheral end of the light transmitting member is in contact with the outer peripheral end of the light exit of the reflecting portion. .

  In one aspect of the lighting fixture according to the present invention, the lighting fixture is a downlight embedded in an opening of a ceiling, and an outer peripheral end of the light transmitting member is a ceiling surface from the opening. It may be configured to project along.

  According to the present invention, the luminance of the light transmitting member can be suppressed, so that the glare can be alleviated. In addition, since the progress of dirt on the reflective portion can be suppressed, it is possible to suppress a decrease in maintenance rate. That is, in the present invention, it is possible to achieve both suppression of the luminance and suppression of the decrease in the maintenance rate.

It is a perspective view when the lighting fixture which concerns on Embodiment 1 of this invention is seen from diagonally downward. It is a fragmentary sectional view of the lighting fixtures which concern on Embodiment 1 of this invention. It is a fragmentary sectional view of the lighting fixture of the comparative example 1. FIG. It is a fragmentary sectional view of the lighting fixture of the comparative example 2. FIG. It is a perspective view when the lighting fixture which concerns on Embodiment 2 of this invention is seen from diagonally downward. It is a fragmentary sectional view of the lighting fixtures which concern on Embodiment 2 of this invention. It is a perspective view when the lighting fixture which concerns on Embodiment 3 of this invention is seen from diagonally downward. It is a fragmentary sectional view of the lighting fixtures which concern on Embodiment 3 of this invention. It is a perspective view when the lighting fixture which concerns on Embodiment 4 of this invention is seen from diagonally downward. It is a fragmentary sectional view of the lighting fixtures which concern on Embodiment 4 of this invention. It is sectional drawing of the lighting fixture which concerns on Embodiment 5 of this invention. It is sectional drawing of the lighting fixture which concerns on Embodiment 6 of this invention. It is sectional drawing of the light transmission member in the lighting fixture which concerns on the modification 1 of this invention. It is a top view of the translucent member in the lighting fixture which concerns on the modification 2 of this invention. It is a top view of the light transmission member in the lighting fixtures concerning modification 3 of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The embodiments described below all show one preferred specific example of the present invention. Therefore, the numerical values, shapes, materials, components, arrangement positions and connection forms of the components, and the like described in the following embodiments are merely examples, and are not intended to limit the present invention. Therefore, among the components in the following embodiments, components that are not described in the independent claims indicating the highest concept of the present invention are described as optional components.

  Each drawing is a schematic view and is not necessarily strictly illustrated. Further, in the drawings, substantially the same configurations are given the same reference numerals, and overlapping descriptions will be omitted or simplified. Further, an axis J of a dashed dotted line in each cross-sectional view indicates an optical axis of the light source unit, the reflection unit, and the light transmitting member, which is a vertical direction in the present specification. In each of the partial cross-sectional views, only the instrument body is illustrated as a partial cross-section.

Embodiment 1
First, the structure of the lighting fixture 1 which concerns on Embodiment 1 of this invention is demonstrated using FIG. 1A and 1B. FIG. 1A is a perspective view of the luminaire according to Embodiment 1 of the present invention as viewed obliquely from below, and FIG. 1B is a partial cross-sectional view of the luminaire (a cross-sectional view passing through the optical axis J). .

  The lighting apparatus 1 according to the present embodiment is, for example, an embedded lighting apparatus such as a downlight which illuminates light downward (floor, ground, wall, etc.) by being embedded in a ceiling of a house or the like.

  As shown in FIGS. 1A and 1B, the lighting fixture 1 includes a light source unit 10, a reflecting unit 20 that reflects light emitted from the light source unit 10, and light disposed so as to cover at least a part of the reflecting unit 20. And a light transmitting member 30 having diffusivity. Furthermore, the lighting fixture 1 includes a fixture body 40 and a frame 50. Hereinafter, each component of the lighting fixture 1 will be described in detail.

[Light source]
The light source unit 10 emits light by the power supplied from a power supply unit (not shown) outside the lighting apparatus 1. The light source unit 10 is, for example, an LED light source (LED module) having a plurality of LEDs, and is configured to emit white light, for example.

  As shown to FIG. 1B, the light source part 10 in this Embodiment is provided with the board | substrate 11, LED12 mounted in the board | substrate 11, and the sealing member 13 which seals LED12.

  The substrate 11 is a mounting substrate for mounting the LED 12 and is, for example, a ceramic substrate, a resin substrate, a metal base substrate, or the like. Although not shown, on the substrate 11, a pair of electrode terminals for receiving from outside the DC power for causing the LED 12 to emit light, and a metal wiring of a predetermined pattern for electrically connecting the LED 12 are formed. ing.

  The LED 12 is an example of a light emitting element, and in the present embodiment, is a bare chip that emits monochromatic visible light. The LED 12 is, for example, a blue light emitting LED chip that emits blue light when energized. For example, a plurality of LEDs 12 are arranged on the substrate 11 in a matrix. In addition, at least one LED 12 may be disposed.

  For example, a translucent resin is used as the sealing member 13. The sealing member 13 in the present embodiment contains a phosphor as a wavelength conversion material for converting the wavelength of the light from the LED 12. The sealing member 13 is, for example, a phosphor-containing resin in which a phosphor and a light diffusing material are dispersed in a silicone resin. As the phosphor particles, in the case where the LED 12 is a blue light emitting diode that emits blue light, for example, a YAG yellow phosphor can be used to obtain white light. Also. Silica particles or the like are used as the light diffusing material. In addition, the sealing member 13 may seal all the LEDs 12 at once, may seal a plurality of LEDs 12 in a row for each row, and may seal each of the LEDs 12 individually. . The sealing member 13 may not contain a phosphor.

[Reflection part]
As shown in FIG. 1B, the reflecting unit 20 includes an incident port 21 formed to surround the light source unit 10, a reflecting surface 22 that reflects light incident from the incident port 21, and light reflected by the reflecting surface 22. Is a reflector having an exit 23 from which light is emitted. Specifically, the inner surface of the reflecting portion 20 is formed in a funnel shape so that the inner diameter gradually increases from the entrance 21 toward the exit 23. The reflection unit 20 is, for example, fitted in the frame 50 and fixed to the frame 50.

  The reflection part 20 can be formed using metal materials, such as aluminum, for example. The reflection part 20 in the present embodiment is made of aluminum die cast. Further, in order to improve the reflectivity, the inner surface of the reflective portion 20 may be subjected to white paint or the like. The reflective portion 20 is not made of a metal material, but may be made of a hard white resin material such as polybutylene terephthalate (PBT), or the reflective portion 20 made of a resin. It is also possible to use an inner surface on which a metal deposition film (metal reflection film) such as silver or aluminum is formed as the reflection surface 22.

  As shown in FIGS. 1A and 1B, the reflecting portion 20 in the present embodiment is completely covered by the light transmitting member 30 and is not exposed to the outside of the lighting fixture 1. That is, the reflection unit 20 is disposed in a state in which the user can not visually recognize.

[Translucent member]
The light transmitting member 30 is a light transmitting panel having a light transmitting property, and is an optical member made of a light transmitting material such as a transparent resin material such as acryl or polycarbonate or a glass material.

  The light transmitting member 30 is further configured to have a light diffusing property. In the present embodiment, a milky white translucent panel in which a light diffusing material is dispersed inside is used as the translucent member 30 having the light diffusing property. Such a translucent member 30 can be manufactured by resin-molding a transparent resin material mixed with a light diffusing material into a predetermined shape. As the light diffusing material, light reflective particles such as silica particles can be used.

  In addition, the translucent member 30 which has light diffusivity does not disperse | distribute a light-diffusion material inside, but forms the milky white light-diffusion film which contains a light-diffusion material etc. on the surface (inner surface or outer surface) of a transparent panel. But it can be realized. In addition, light diffusivity can also be achieved by forming micro-concavities and convexities on the surface of the transparent panel by applying surface treatment such as embossing, instead of using a light diffusing material, or printing a dot pattern on the surface of the transparent panel. Can be realized. In these cases, a light diffusing material may be further contained in the transparent panel in which the unevenness or dot pattern is formed on the surface. Moreover, instead of surface treatment being applied to a panel having a flat surface to form asperities, a transparent panel having asperities may be formed by resin molding using a mold having asperities.

  As shown in FIGS. 1A and 1B, the light transmitting member 30 is disposed at a position facing the light source unit 10, and transmits light from the light source unit 10. Since the light transmitting member 30 has light diffusing properties, light incident on the light transmitting member 30 is diffused and transmitted through the light transmitting member 30 in the light transmitting member 30 to be transmitted through the light transmitting member 30 and emitted. . That is, since the light transmitting member 30 diffuses and guides the light of the LED light source having strong directivity, the entire light transmitting member 30 functions as a light emitting unit that emits pseudo light.

  The light transmitting member 30 is configured such that the outer surface protrudes toward the light source unit 10. Specifically, the light transmitting member 30 is configured to protrude toward the light source unit 10 such that the central portion of the outer surface of the light transmitting member 30 is closest to the light source unit 10.

  In addition, the light transmitting member 30 is configured such that at least a portion of the outer surface is curved, and in the present embodiment, the light transmitting member 30 is curved such that the entire outer surface of the portion covering the reflecting portion 20 protrudes toward the light source portion 10 doing. That is, the outer surface of the part which covers the reflection part 20 of the light transmission member 30 is a curved surface. Specifically, the light transmitting member 30 has a rotationally symmetric shape with the axis J as an axis, and the outer surface is substantially in the shape of a bowl formed of a continuous smooth curved surface.

  In the present embodiment, the thickness of the light transmitting member 30 is substantially constant. Therefore, the inner surface of the light transmitting member 30 has the same shape as the outer surface, and is curved so as to protrude toward the light source unit 10. Further, the outer surface and the inner surface of the light transmitting member 30 are configured to be close to the reflecting surface 22 of the reflecting unit 20. As shown to FIG. 1B, the inner surface of the light transmission member 30 and the reflective surface 22 of the reflection part 20 approach and face each other.

  Furthermore, the light transmitting member 30 is disposed so as not to expose the reflecting portion 20 to the outside of the lighting fixture 1. In the present embodiment, the light transmitting member 30 is disposed such that the annular outer peripheral end of the light transmitting member 30 is in contact along the annular outer peripheral end of the emission port 23 of the reflecting portion 20. Specifically, the light transmitting member 30 is disposed so as to seal the reflecting portion 20, and the emission port 23 of the reflecting portion 20 is closed by the light transmitting member 30. That is, the reflection unit 20 is hidden by the light transmitting member 30. The light transmitting member 30 is fixed to the reflecting portion 20 by fixing the outer peripheral end portion of the light transmitting member 30 and the outer peripheral end portion of the emission port 23 of the reflecting portion 20.

[Device body]
The fixture body 40 is a housing that forms the outer shell of the lighting fixture 1 and is a mount on which the light source unit 10 is attached. The light source unit 10 is supported by the instrument body 40 and fixed to the instrument body 40.

  The instrument body 40 also functions as a heat sink that dissipates the heat generated by the light source unit 10. In the present embodiment, in order to improve heat dissipation, a plurality of heat radiation fins projecting upward are provided on the upper portion (ceiling side portion) of the instrument body 40.

  The tool body 40 configured in this manner is formed using a metal material, and in the present embodiment, is made of aluminum die-cast.

[Frame]
The frame 50 is a casing that forms the outer shell of the lighting device 1, and is configured in a tubular shape so as to surround the reflection unit 20. The frame 50 has, for example, a substantially cylindrical shape. At the lower end portion of the frame 50, a flange 51 projecting radially outward is formed circumferentially.

  When the luminaire 1 is disposed in the opening of the ceiling, the flange 51 of the frame 50 is locked to the ceiling surface to fix the luminaire 1 to the ceiling.

[Function effect]
Next, the operation and effect of the lighting device 1 according to the present embodiment will be described using FIGS. 2 and 3 in comparison with the lighting device of the comparative example. FIG. 2 is a partial cross-sectional view of the luminaire of Comparative Example 1, and FIG. 3 is a partial cross-sectional view of the luminaire of Comparative Example 2. As shown in FIG.

  As a general method for reducing glare, a configuration as shown in FIG. 2 can be considered. In the luminaire 100 of Comparative Example 1 shown in FIG. 2, the small lancet-like light transmitting member 130 having light diffusibility is directed from the device main body 40 toward the entrance 21 of the reflecting portion 20 (opposite to the light source portion 10 side) ) Is configured to protrude.

  However, in the lighting fixture 100 of Comparative Example 1 shown in FIG. 2, since the entire reflection unit 20 is exposed, the progress of the contamination of the reflection unit 20 is accelerated. For this reason, the degree of decrease of the luminous flux maintenance rate is increased, and the degree of decrease of the maintenance rate is also increased. Furthermore, in the lighting fixture 100 of Comparative Example 1, the light emitting area of the light transmitting member 130 is limited. In addition, since the light transmitting member 130 protrudes to the side opposite to the light source unit 10 side, when the light transmitting member 130 is configured to exceed the limit of the light emission area, the light transmitting member 130 will pop out from the ceiling. Is worse.

  Therefore, a configuration as shown in FIG. 3 is also considered. In the luminaire 200 of Comparative Example 2 shown in FIG. 3, a flat light transmitting member 230 having a light diffusing property is provided so as to cover the reflecting portion 20.

  However, although the luminaire 200 of Comparative Example 2 shown in FIG. 3 can suppress the luminance more than the luminaire 100 of Comparative Example 1, the area of the planar light transmitting member 230 is limited. Furthermore, in the lighting fixture 200 of the comparative example 2 shown in FIG. 3, since the planar translucent member 230 is used, there exists a problem of lacking in the three-dimensional effect peculiar to a design embedded type lighting fixture.

  On the other hand, as shown to FIG. 1B, in the lighting fixture 1 in this Embodiment, the outer surface of the translucent member 30 protrudes toward the light source part 10, and the translucent member 30 protrudes on the opposite side to a user side. ing. Thereby, compared with the lighting fixture 200 of the comparative example 1, the light emission area of the pseudo light emission in the translucent member 30 can be enlarged. Therefore, since the brightness in the light transmitting member 30 can be suppressed, the glare can be alleviated.

  Furthermore, in the lighting fixture 1 according to the present embodiment, since the light transmitting member 30 is disposed so as to cover the reflecting portion 20, the progress of the contamination of the reflecting portion 20 is made as compared with the case where the reflecting portion 20 is exposed. It can be suppressed. As a result, the degree of decrease in the luminous flux maintenance rate can be suppressed, so the degree of decrease in the maintenance rate can also be suppressed.

  As described above, the lighting fixture 1 according to the present embodiment includes the light diffusing member 30 having the light diffusing property, which is disposed so that the outer surface protrudes toward the light source unit 10 and covers the reflecting unit 20. In addition, it is possible to achieve both suppression of the luminance and suppression of the decrease in the maintenance rate.

  Moreover, in the lighting fixture 1 according to the present embodiment, there are few places protruding downward from the ceiling, and the light transmitting member 30 does not protrude downward from the ceiling surface. In addition, it is configured to be familiar with the ceiling when it is turned off. Thus, the luminaire 1 is configured with a small amount of modeling, and has a form that can be seen clearly. Furthermore, in the lighting device 1 according to the present embodiment, since the light transmitting member 30 protrudes on the opposite side to the user side, it is possible to make the three-dimensional effect unique to the design embedded lighting device.

  Further, in the present embodiment, since the light transmitting member 30 is curved so that the entire outer surface protrudes toward the light source unit 10, the luminance of the light transmitting member 30 can be further suppressed. In addition, since the light transmitting member 30 is disposed so as not to expose the entire reflection unit 20, the degree of decrease in the maintenance rate can be further suppressed.

Second Embodiment
Next, a lighting fixture 2 according to Embodiment 2 of the present invention will be described using FIGS. 4A and 4B. FIG. 4A is a perspective view of the luminaire according to Embodiment 2 of the present invention as viewed obliquely from below, and FIG. 4B is a partial cross-sectional view of the luminaire taken along the optical axis J. .

  As shown in FIGS. 4A and 4B, the lighting fixture 2 according to the present embodiment also has a light diffusive light transmission configured such that the outer surface protrudes toward the light source unit 10 as in the first embodiment. A member 30A is provided.

  The point in which the lighting fixture 2 in the present embodiment is different from the lighting fixture 1 in the first embodiment is that the light transmitting member 30 is arranged to hide the whole of the reflection unit 20 in the first embodiment. In the embodiment, the light transmitting member 30A is disposed so as to hide a part of the reflecting portion 20. That is, in the first embodiment, the light transmitting member 30 is disposed so as to seal and cover the reflecting portion 20 so that the entire reflecting portion 20 is not exposed. However, in the present embodiment, the reflecting portion 20 is Some of the are exposed.

  As described above, the same effects as in the first embodiment can be obtained for the lighting apparatus 2 in the present embodiment.

  That is, since the outer surface of the light transmitting member 30A protrudes toward the light source unit 10, the brightness of the light transmitting member 30A can be suppressed, and the glare can be alleviated.

  Further, since the light transmitting member 30A is disposed so as to cover a part of the reflecting portion 20, it is possible to suppress the progress of the contamination of the reflecting portion 20 as compared to the case where the entire reflecting portion 20 is exposed. The degree of decline in the maintenance rate can be suppressed. However, as in the first embodiment, the effect of suppressing the decrease in the maintenance rate is larger when the entire reflection unit 20 is hidden.

  In addition, the lighting apparatus 2 in the present embodiment is also configured with a small amount of modeling, so that it looks clean and can give a three-dimensional effect unique to embedded lighting apparatuses.

  The present embodiment can also be applied to the following embodiments.

Third Embodiment
Next, a lighting fixture 3 according to Embodiment 3 of the present invention will be described using FIGS. 5A and 5B. FIG. 5A is a perspective view of the luminaire according to Embodiment 3 of the present invention as viewed obliquely from below, and FIG. 5B is a partial cross-sectional view of the luminaire taken along the optical axis J. .

  As shown in FIGS. 5A and 5B, the lighting fixture 3 according to the present embodiment also has a light diffusive light transmission configured such that the outer surface protrudes toward the light source unit 10 as in the first embodiment. A member 30B is provided.

  In the first embodiment, the lighting device 3 according to the present embodiment is different from the lighting device 1 according to the first embodiment in that the outer peripheral end of the light transmitting member 30 is in contact with the inner surface of the frame 50 and the ceiling surface is In the present embodiment, the outer peripheral end portion of the light transmitting member 30B is configured to protrude along the ceiling surface from the opening portion of the ceiling, in contrast to the configuration in which the light emitting member is not extended along.

  Furthermore, in the present embodiment, unlike the first embodiment, in the outer surface of the light transmission member 30B, the central portion facing the light source unit 10 of the outer surface is a flat surface, and the peripheral portion around the central portion of the outer surface is It is a curved surface.

  In the present embodiment, the frame 50 is not provided, and the luminaire 3 is fixed to the ceiling by the flange 24 provided on the reflection unit 20. The flange 24 is formed in the lower end portion of the reflecting portion 20 so as to protrude radially outward and extend in the circumferential direction. When the luminaire 3 is disposed in the opening of the ceiling, the flange 24 of the reflection unit 20 is locked to the ceiling surface to fix the luminaire 3 to the ceiling.

  A flange 31 is formed at the outer peripheral end of the light transmitting member 30B. The flange 31 is formed to project radially outward and extend circumferentially. When the luminaire 3 is disposed on the ceiling, the flange 31 of the light transmitting member 30B protrudes along the ceiling surface so as to cover the flange 24 of the reflection unit 20. In the present embodiment, the flange 31 of the light transmitting member 30B is extended beyond the flange 24 of the reflecting portion 20.

  As described above, the same effects as in the first embodiment can be obtained for the lighting device 3 in the present embodiment.

  That is, since the outer surface of the light transmitting member 30B protrudes toward the light source unit 10, the brightness of the light transmitting member 30B can be suppressed, and the glare can be alleviated.

  Moreover, in the present embodiment, since the flange 31 protruding along the ceiling surface from the opening of the ceiling is formed at the outer peripheral end of the light transmitting member 30B, compared to the first embodiment, the light transmitting member 30B is The light emission area of the pseudo light emission can be further increased. Therefore, since the luminance in the light transmitting member 30B can be suppressed as compared with the first embodiment, the glare can be further alleviated.

  Further, also in the present embodiment, as in the first embodiment, the light transmitting member 30B is disposed so as to cover the entire reflecting portion 20. Thereby, it is possible to suppress the progress of the contamination of the reflection unit 20, and, as in the first embodiment, it is possible to suppress the decrease degree of the maintenance rate.

  In addition, the lighting apparatus 3 in the present embodiment is also configured with a small amount of modeling, so that it looks clean and can give a three-dimensional effect unique to the embedded lighting apparatus.

  Further, in the present embodiment, a central portion of the light-transmissive member 30B facing the light source unit 10 in the outer surface is a flat surface. Thereby, the distance between the light source unit 10 and the light transmitting member 30B can be increased and the light source unit 10 and the light transmitting member 30B can be separated as compared to the case where the light source unit 10 is also protruded to the central portion. Brightness can be suppressed.

  Note that this embodiment can be applied to other embodiments. Further, in the present embodiment, the lighting fixture 3 is locked to the ceiling by the flange 24 of the reflection unit 20, but the ceiling is formed by the flange 51 of the frame 50 using the frame 50 as in the first embodiment. It may be locked to In this case, the flange 31 of the light transmitting member 30B is extended beyond the flange 51 of the frame 50.

Embodiment 4
Next, a lighting fixture 4 according to Embodiment 4 of the present invention will be described using FIGS. 6A and 6B. FIG. 6A is a perspective view of the luminaire according to Embodiment 4 of the present invention as viewed obliquely from below, and FIG. 6B is a partial cross-sectional view of the luminaire taken along the optical axis J. .

  As shown in FIGS. 6A and 6B, the lighting fixture 4 according to the present embodiment also has a light diffusive light transmission configured such that the outer surface protrudes toward the light source unit 10 as in the first embodiment. A member 30C is provided.

  Similar to the third embodiment, the lighting device 4 according to the present embodiment is different from the lighting device 1 according to the first embodiment in that, in the present embodiment, the outer peripheral end of the light transmitting member 30C is from the opening of the ceiling It is configured to project along the ceiling surface, and the outer peripheral end of the light transmitting member 30C extends beyond the flange 24 so as to cover the flange 24 of the reflecting portion 20.

  Further, in the present embodiment, the curvature radius of the outer surface and the inner surface of the light transmitting member 30C is larger than the curvature radius of the outer surface and the inner surface of the light transmitting member 30 in the first embodiment. That is, in the present embodiment, the degree of curvature of the light transmitting member 30 is loose.

  Also in the present embodiment, as in the third embodiment, the frame 50 is not provided, and the lighting fixture 3 is fixed to the ceiling by the flange 24 provided in the reflection unit 20.

  The outer peripheral end of the light transmitting member 30 </ b> C is formed with a side wall portion 32 which covers the flange 24 of the reflecting portion 20. The side wall portion 32 is configured to project along the ceiling surface when the lighting fixture 4 is disposed on the ceiling, and is configured to cover the side portion of the flange 24.

  As described above, the same effects as in the first embodiment can be obtained for the lighting apparatus 4 in the present embodiment.

  That is, since the outer surface of the light transmitting member 30C protrudes toward the light source unit 10, the brightness of the light transmitting member 30C can be suppressed, and the glare can be alleviated.

  Moreover, in the present embodiment, as in the second embodiment, since the sidewall 32 extending along the ceiling surface from the opening of the ceiling is formed at the outer peripheral end of the light transmitting member 30C, the embodiment The brightness of the light-transmissive member 30C can be suppressed more than 1 and glare can be further alleviated.

  In this case, in the present embodiment, the side wall portion 32 is formed to cover even the side portion of the flange 24 of the reflection portion 20. Thus, the light guided in the light transmitting member 30C is emitted from the side wall 32 along the ceiling surface, so that the irradiation range can be widened.

  Further, also in the present embodiment, as in the first and second embodiments, since the light transmitting member 30C is disposed so as to cover the entire reflection unit 20, the maintenance rate is lowered as in the first and second embodiments. The degree can be suppressed.

  In addition, the lighting apparatus 4 in the present embodiment is also configured with a small amount of modeling, so that it looks clean and can give a three-dimensional effect unique to embedded lighting apparatuses.

  Further, in the present embodiment, the curvature radius of the outer surface and the inner surface of the light transmitting member 30C is larger than the curvature radius of the outer surface and the inner surface of the light transmitting member 30 in the first embodiment. As a result, compared to the first embodiment, the distance between the light source unit 10 and the light transmitting member 30C can be increased to separate the light source unit 10 from the light transmitting member 30C, and the luminance can be effectively suppressed. it can.

  Note that this embodiment can be applied to other embodiments. Also in the present embodiment, the lighting fixture 4 may be fixed to the ceiling using the frame 50. In this case, the flange 31 of the light transmitting member 30C is extended beyond the flange 51 of the frame 50.

(Other modifications etc.)
The lighting apparatus according to the present invention has been described above based on the embodiments, but the present invention is not limited to these embodiments.

  For example, as long as the light transmitting member is a member that protrudes to the light source unit 10 as a whole, as shown in FIG. 7, there is a part where the light transmitting member protrudes to the opposite side (downward side) It does not matter. In this case, the downwardly projecting portion may be formed in a curved shape, for example, as shown in FIG.

  Moreover, although the peripheral part (side surface) of the light transmission member was a curved surface in the said embodiment, as shown in FIG. 8, you may use the light transmission member 30E by which the peripheral part was comprised by step shape.

  Although the thickness of the light transmitting member is substantially constant in the above embodiment, the thickness of the light transmitting member may not be constant as long as the outer surface of the light transmitting member protrudes toward the light source unit 10. For example, as shown in FIG. 9, it is possible to use a light transmitting member 30F whose outer inner surface (surface on the light source unit 10 side) is flat and whose outer surface is curved.

  Further, although the diffusion degree of the light transmitting member is constant in the above embodiment, the present invention is not limited to this. For example, as in a translucent member 30G shown in FIG. 10, the degree of diffusion may be gradually reduced from the center toward the periphery. In this case, the light transmitting member 30G can be configured to have a diffusion function in the central portion and not to the peripheral portion. That is, the peripheral portion can be a light transmitting portion having no light diffusivity. The light transmitting portion may be provided with a lens function of a condensing action and a diverging action on the light from the light source unit 10 as necessary.

  Alternatively, as in the translucent member 30H shown in FIG. 11, the diffusion degree (uniform diffusion degree) of the central portion facing the light source unit 10 is greater than the diffusion degree (uniform diffusion degree) of the peripheral portion around the central portion. May also be configured to be higher. In this case, for example, a milky white light diffusion film may be formed on the central portion of the light transmitting member 30F (silk printing), and a dot pattern may be formed on the peripheral portion of the light transmitting member 30H. That is, the light transmitting member may be configured by using a plurality of different diffusion means.

  Further, in the above embodiment, the light source unit 10 is configured to emit white light by the blue LED and the yellow phosphor, but the present invention is not limited to this. For example, a phosphor-containing resin containing a red phosphor and a green phosphor may be used to emit white light by combining this with a blue LED.

  Moreover, although the LED chip which light-emits blue was used in the said embodiment, it does not restrict to this. As the LED 12, an LED chip that emits a color other than blue may be used. For example, when using the LED chip of an ultraviolet-ray light emission as LED12, what combined each color fluorescent substance particle which light-emits in three primary colors (red, green, blue) can be used as fluorescent substance particle. Furthermore, wavelength conversion materials other than phosphor particles may be used. For example, as a wavelength conversion material, a semiconductor, a metal complex, an organic dye, a pigment, etc. absorbs light of a certain wavelength and the wavelength is different from the absorbed light A material containing a substance that emits light may be used.

  In the above embodiment, the light source unit 10 (LED light source) has a COB (Chip On Board) structure in which the LED chip is directly mounted on the substrate 11. However, the present invention is not limited to this. For example, instead of the COB type LED light source, an LED light source having an SMD (Surface Mount Device) structure may be used. The LED light source of the SMD structure is a package type LED element in which an LED chip (light emitting element) is mounted in a recess of a package (container) made of resin and a sealing member (phosphor-containing resin) is sealed in the recess. (SMD type LED element) is the structure mounted in the board | substrate.

  In the above embodiment, the LED chip is exemplified as the light emitting element, but as the light emitting element, a semiconductor light emitting element such as a semiconductor laser, or an EL element such as organic EL (Electro Luminescence) or inorganic EL, or other solid A light emitting element may be used.

  In addition, the present invention can be realized by arbitrarily combining components and functions in each embodiment without departing from the scope of the present invention or embodiments obtained by applying various modifications that those skilled in the art may think to each embodiment. The form is also included in the present invention.

DESCRIPTION OF SYMBOLS 1 luminaire 10 light source part 20 reflection part 21 entrance 22 reflection surface 23 exit 30 light transmission member

Claims (12)

A luminaire embedded in an opening of a ceiling,
A light source unit,
A reflective portion having a reflective surface that reflects light emitted from the light source portion;
And a light diffusing member having a light diffusing property, which is disposed to cover at least a part of the reflecting surface,
The outer surface of the light transmitting member protrudes toward the light source as a whole .
The light transmitting member has a rotationally symmetric shape, and includes a central portion of the outer surface facing the light source portion and a peripheral portion of the outer surface around the central portion.
The peripheral portion is configured to be curved,
The reflecting portion includes a entrance which light emitted from said formed so as to surround the light source unit Rutotomoni the light source unit is incident, and the reflecting surface for reflecting light from said light source unit is incident from the incident port, A luminaire which is a reflecting plate having an exit from which light reflected by the reflecting surface is emitted. The light transmitting member is a milky white panel in which a light diffusing material is dispersed inside, a panel on which a milky white light diffusing film is formed on the surface, or a panel on which a dot pattern is printed on the surface. Lighting equipment. The lighting fixture according to claim 1, wherein the light transmitting member is curved such that the entire outer surface protrudes toward the light source unit. The translucent member is a pre-SL in central portion plane and the lighting device according to prior distichum side portions claim are configured to be curved surfaces 1 or 2. The said translucent member is arrange | positioned so that the said reflection part may not be exposed, The lighting fixture of any one of Claims 1-4. The translucent member, the lighting device according to any one of claims 1 to 5, the diffusion degree of the previous SL in central portion is configured to be higher than the degree of diffusion front distichum side portions. The said translucent member is comprised so that a diffusion degree may reduce toward a periphery from a center, The lighting fixture of any one of Claims 1-5. The lighting fixture according to claim 7, wherein the light transmitting member is disposed such that an outer peripheral end of the light transmitting member is in contact with an outer peripheral end of the light exit of the reflecting portion. The lighting fixture according to any one of claims 1 to 8, wherein an outer peripheral end of the light transmitting member is configured to protrude from the opening along a ceiling surface. The lighting fixture according to any one of claims 1 to 9, wherein an inner surface of the light transmitting member is in close proximity to and faces the reflecting surface. The lighting equipment according to any one of claims 1 to 10, wherein the light transmitting member protrudes so as to be close to and face the reflecting portion. The lighting fixture according to any one of claims 1 to 11, wherein the light source unit is an LED light source.