JP2015176817A - Lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device which reduces the luminance and inhibits deterioration of the maintenance factor.SOLUTION: A lighting device includes: a light source part 10; a reflection part 20 which reflects light emitted from the light source part 10; and a translucent member 30 which is disposed so as to cover at least a part of the reflection part 20 and has light diffusivity. An outer surface of the translucent member 30 protrudes toward the light source part 10.

Description

  The present invention relates to a lighting fixture, and more particularly to an embedded lighting fixture that uses a light emitting element such as a light emitting diode (LED) as a light source.

  Conventionally, as an embedded lighting fixture, for example, a ceiling embedded lighting fixture that is embedded in a ceiling and emits light downward, such as a downlight, or an upper portion that is embedded in the ground and placed above Underground lighting fixtures that irradiate light are known. For example, Patent Literature 1 discloses a ceiling-embedded lighting fixture.

  This type of lighting fixture includes an LED light source (light source unit) and a reflecting plate (reflecting unit) that reflects light from the LED light source on the inner peripheral surface. Moreover, in order to relieve the glare of a highly directional LED light source, a transmissive member having diffusibility is disposed on the light emission side of the LED light source.

JP 2011-210621 A

  However, the conventional lighting fixture has a problem that the translucent member has high brightness and feels dazzling. In addition, some conventional lighting fixtures have the entire reflection plate exposed. However, in such lighting fixtures, there is a problem that the progress of dirt on the reflection plate is rapid and the degree of decrease in the maintenance rate is large.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide a lighting apparatus that can suppress luminance and suppress a decrease in maintenance rate.

  In order to achieve the above object, one aspect of a lighting fixture according to the present invention is disposed so as to cover a light source unit, a reflection unit that reflects light emitted from the light source unit, and at least a part of the reflection unit. And a translucent member having light diffusibility, and an outer surface of the translucent member protrudes toward the light source unit.

  Moreover, the aspect of the lighting fixture which concerns on this invention WHEREIN: The said translucent member may be comprised so that at least one part of the said outer surface may curve.

  In this case, the translucent member may be curved so that the entire outer surface protrudes toward the light source unit.

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

  Moreover, the aspect of the lighting fixture which concerns on this invention WHEREIN: The said translucent member may be arrange | positioned so that the said reflection part may not be exposed.

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

  Moreover, the one aspect | mode of the lighting fixture which concerns on this invention WHEREIN: The said translucent member may be comprised so that a diffusion degree may decrease toward the periphery from the center.

  Further, in one aspect of the lighting fixture according to the present invention, the reflection unit includes an incident port formed so as to surround the light source unit, a reflection surface that reflects light incident from the incident port, and the reflection surface. A reflection plate having an exit from which the reflected light is emitted may be used.

  Moreover, the aspect of the lighting fixture which concerns on this invention WHEREIN: The said translucent member may be arrange | positioned so that the outer peripheral end part of the said translucent member may contact the outer peripheral end part of the said exit of the said reflection part. .

  Further, in one aspect of the luminaire according to the present invention, the luminaire is a downlight embedded in a ceiling opening, and the outer peripheral end of the translucent member extends from the opening to the ceiling surface. You may be comprised so that it may protrude along.

  According to the present invention, since the brightness in the light transmissive member can be suppressed, glare can be reduced. In addition, since the progress of dirt on the reflecting portion can be suppressed, a decrease in maintenance rate can be suppressed. That is, in the present invention, it is possible to achieve both suppression of luminance and reduction of 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 fixture which concerns on Embodiment 1 of this invention. It is a fragmentary sectional view of the lighting fixture of the comparative example 1. It is a fragmentary sectional view of the lighting fixture of the comparative example 2. 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 fixture which concerns 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 fixture which concerns 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 fixture which concerns 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 translucent 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 translucent member in the lighting fixture which concerns on the modification 3 of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Each of the embodiments described below shows a preferred specific example of the present invention. Accordingly, numerical values, shapes, materials, components, arrangement positions and connection forms of components shown in the following embodiments are merely examples, and are not intended to limit the present invention. Therefore, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims showing the highest concept of the present invention are described as optional constituent elements.

  Each figure is a schematic diagram and is not necessarily illustrated strictly. Moreover, in each figure, the same code | symbol is attached | subjected to the substantially same structure, The overlapping description is abbreviate | omitted or simplified. In addition, an axis J indicated by an alternate long and short dash line in each cross-sectional view indicates an optical axis of the light source unit, the reflection unit, and the translucent member, and is a vertical direction in this specification. In each partial cross-sectional view, only the instrument body is shown 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 FIG. 1B. 1A is a perspective view of the lighting fixture according to Embodiment 1 of the present invention when viewed obliquely from below, and FIG. 1B is a partial cross-sectional view (cross-sectional view taken through the optical axis J) of the lighting fixture. .

  The luminaire 1 according to the present embodiment is an embedded luminaire such as a downlight that illuminates light downward (floor, ground, walls, etc.) by being embedded in a ceiling of a house, for example.

  As shown in FIGS. 1A and 1B, the luminaire 1 includes a light source unit 10, a reflection 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 reflection unit 20. And a translucent member 30 having diffusibility. Furthermore, the lighting fixture 1 includes a fixture main 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 power supplied from a power supply unit (not shown) outside the lighting fixture 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 illustrated in FIG. 1B, the light source unit 10 in the present embodiment includes a substrate 11, an LED 12 mounted on the substrate 11, and a sealing member 13 that seals the LED 12.

  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, the substrate 11 is formed with a pair of electrode terminals for receiving DC power for causing the LED 12 to emit light from the outside and a metal wiring having a predetermined pattern for electrically connecting the LED 12. ing.

  The LED 12 is an example of a light emitting element, and in the present embodiment, the LED 12 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 in a matrix on the substrate 11. Note that at least one LED 12 may be disposed.

  As the sealing member 13, for example, a translucent resin is used. The sealing member 13 in the present embodiment includes a phosphor as a wavelength conversion material that converts the wavelength of 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, when the LED 12 is a blue light emitting diode that emits blue light, for example, a YAG-based yellow phosphor can be used to obtain white light. Also. Silica particles or the like are used as the light diffusing material. The sealing member 13 may collectively seal all the LEDs 12, may seal a plurality of LEDs 12 in a line shape for each column, or may seal each LED 12 individually. . Further, the sealing member 13 may not contain a phosphor.

[Reflection part]
As illustrated in FIG. 1B, the reflecting unit 20 includes an incident port 21 formed so as 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 port 23 from which the light exits. 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 port 21 toward the exit port 23. The reflection unit 20 is fixed to the frame 50 by being fitted into the frame 50, for example.

  The reflection part 20 can be formed using metal materials, such as aluminum, for example. Reflecting portion 20 in the present embodiment is made of aluminum die cast. Moreover, you may give white coating etc. to the inner surface of the reflection part 20 in order to improve reflectivity. The reflecting portion 20 is not formed of a metal material, but may be formed of a hard white resin material such as polybutylene terephthalate (PBT), or the reflecting portion 20 made of resin. You may use what formed metal vapor deposition films (metal reflective film), such as silver and aluminum, as the reflective surface 22 on the inner surface.

  As shown in FIG. 1A and FIG. 1B, the reflection portion 20 in the present embodiment is completely covered by the translucent member 30 and is not exposed to the outside of the lighting fixture 1. That is, the reflection part 20 is arrange | positioned in the state which a user cannot visually recognize.

[Translucent member]
The translucent member 30 is a translucent panel having translucency, and is an optical member made of a translucent material such as a transparent resin material such as acrylic or polycarbonate or a glass material.

  The translucent member 30 is further configured to have light diffusibility. In the present embodiment, a milky white translucent panel in which a light diffusing material is dispersed is used as the translucent member 30 having light diffusibility. 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.

  The translucent member 30 having light diffusivity does not disperse the light diffusing material inside, but forms a milky white light diffusing film containing the light diffusing material or the like on the surface (inner surface or outer surface) of the transparent panel. But it can be realized. Also, instead of using a light diffusing material, light diffusibility can also be achieved by forming fine irregularities on the surface of the transparent panel by applying a surface treatment such as embossing or printing a dot pattern on the surface of the transparent panel. The translucent member 30 having the above can be realized. In these cases, a light diffusing material may be further added to the transparent panel having an uneven surface or a dot pattern formed on the surface. In addition, the surface treatment may not be performed on the flat surface panel to form the unevenness, but the transparent panel having the unevenness on the surface may be formed by resin molding using a mold having the unevenness.

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

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

  Further, the translucent member 30 is configured such that at least a part of the outer surface is curved, and in the present embodiment, the entire outer surface of the portion covering the reflecting portion 20 is curved so as to protrude toward the light source unit 10. doing. That is, the outer surface of the portion that covers the reflecting portion 20 of the translucent member 30 is a curved surface. Specifically, the translucent member 30 has a rotationally symmetric shape with the axis J as an axis, and an outer surface of the translucent member 30 has a substantially bowl shape formed of a continuous smooth curved surface.

  In the present embodiment, the thickness of the translucent member 30 is substantially constant. Therefore, the inner surface of the translucent 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 translucent member 30 are configured to approach the reflecting surface 22 of the reflecting portion 20. As shown in FIG. 1B, the inner surface of the translucent member 30 and the reflecting surface 22 of the reflecting portion 20 are close to each other and face each other.

  Furthermore, the translucent 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 translucent member 30 is arranged such that the annular outer peripheral end portion of the translucent member 30 is in contact with the annular outer peripheral end portion of the exit port 23 of the reflecting portion 20. Specifically, the translucent 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 translucent member 30. That is, the reflection unit 20 is hidden by the translucent member 30. The translucent member 30 is fixed to the reflecting portion 20 by fixing the outer peripheral end portion of the translucent member 30 and the outer peripheral end portion of the exit port 23 of the reflecting portion 20.

[Equipment body]
The fixture body 40 is a housing that forms an outline of the lighting fixture 1 and is a mounting base to 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 radiates heat generated by the light source unit 10. In the present embodiment, in order to improve heat dissipation, a plurality of heat radiation fins protruding upward are provided on the upper portion (ceiling side portion) of the instrument body 40.

  The instrument body 40 configured in this way is formed using a metal material, and is made of aluminum die casting in the present embodiment.

[Frame]
The frame body 50 is a casing that forms an outline of the lighting fixture 1, and is configured in a cylindrical shape so as to surround the reflecting portion 20. The frame 50 has, for example, a substantially cylindrical shape. A flange 51 protruding outward in the radial direction is formed at the lower end portion of the frame body 50 in the circumferential direction.

  When the lighting fixture 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 lighting fixture 1 to the ceiling.

[Function and effect]
Next, the effect of the lighting fixture 1 which concerns on this Embodiment is demonstrated, comparing with the lighting fixture of a comparative example using FIG.2 and FIG.3. FIG. 2 is a partial cross-sectional view of the lighting fixture of Comparative Example 1, and FIG. 3 is a partial cross-sectional view of the lighting fixture of Comparative Example 2.

  As a general technique for reducing glare, a configuration as shown in FIG. 2 can be considered. In the lighting fixture 100 of the comparative example 1 shown in FIG. 2, the light transmitting diffuser 130 having a light diffusibility is directed from the fixture body 40 toward the entrance 21 of the reflecting portion 20 (on the side opposite to the light source portion 10 side). (Ii) It is configured to protrude.

  However, in the lighting fixture 100 of the comparative example 1 shown in FIG. 2, since the reflection part 20 whole is exposed, progress of the stain | pollution | contamination of the reflection part 20 becomes quick. For this reason, the degree of decrease in the luminous flux maintenance factor increases, and the degree of decrease in the maintenance rate also increases. Furthermore, in the lighting fixture 100 of the comparative example 1, the light emission area of the translucent member 130 has a limit. Moreover, since the translucent member 130 protrudes on the side opposite to the light source unit 10 side, if the translucent member 130 is configured so as to exceed the limit of the light emitting area, the translucent member 130 will jump out of the ceiling, and the design property Becomes worse.

  Therefore, a configuration as shown in FIG. 3 is also considered. In the lighting fixture 200 of the comparative example 2 shown by FIG. 3, it is the structure which provided the flat plate-shaped translucent member 230 which has a light diffusibility so that the reflection part 20 might be covered.

  However, although the lighting fixture 200 of the comparative example 2 shown in FIG. 3 can suppress a brightness | luminance compared with the lighting fixture 100 of the comparative example 1, the planar translucent member 230 has a limit in the area. 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 that the three-dimensional effect peculiar to the design embedded type lighting fixture is lacking.

  On the other hand, as shown in FIG. 1B, in the lighting fixture 1 according to the present embodiment, the outer surface of the light transmissive member 30 protrudes toward the light source unit 10, and the light transmissive member 30 protrudes on the opposite side to the 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 | luminance in the translucent member 30 can be suppressed, glare can be relieved.

  Furthermore, in the lighting fixture 1 in this Embodiment, since the translucent member 30 is arrange | positioned so that the reflection part 20 may be covered, the progress of the stain | pollution | contamination of the reflection part 20 compared with the case where the reflection part 20 is exposed. Can be suppressed. Thereby, since the fall degree of a luminous flux maintenance factor can be suppressed, the fall degree of a maintenance rate can also be suppressed.

  Thus, in the lighting fixture 1 in this Embodiment, since the outer surface protrudes toward the light source part 10, and since the translucent member 30 which has the light diffusibility arrange | positioned so that the reflection part 20 may be covered is provided. Thus, it is possible to achieve both suppression of luminance and reduction in maintenance rate.

  Moreover, in the luminaire 1 according to the present embodiment, there are few portions that protrude downward from the ceiling, and the translucent member 30 does not protrude downward from the ceiling surface. In addition, the lamp is adapted to the ceiling when turned off. Thus, the lighting fixture 1 is comprised with few modeling, and has a form which can be seen clearly. Furthermore, in the lighting fixture 1 in this Embodiment, since the translucent member 30 protrudes on the opposite side to the user side, the three-dimensional effect peculiar to the design embedded type lighting fixture can be made to feel.

  Moreover, in this Embodiment, since the translucent member 30 is curving so that the whole outer surface may protrude toward the light source part 10, the brightness | luminance in the translucent member 30 can be suppressed further. And since the translucent member 30 is arrange | positioned so that the reflection part 20 whole may not be exposed, the fall degree of a maintenance rate can be suppressed further.

(Embodiment 2)
Next, the lighting fixture 2 which concerns on Embodiment 2 of this invention is demonstrated using FIG. 4A and FIG. 4B. 4A is a perspective view of the lighting fixture according to Embodiment 2 of the present invention when viewed obliquely from below, and FIG. 4B is a partial cross-sectional view (cross-sectional view taken through the optical axis J) of the lighting fixture. .

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

  The difference between the luminaire 2 in the present embodiment and the luminaire 1 in the first embodiment is that, in the first embodiment, the translucent member 30 is arranged so as to hide the entire reflecting portion 20, whereas the present In the embodiment, the translucent member 30 </ b> A is arranged so as to hide a part of the reflecting portion 20. That is, in Embodiment 1, the translucent member 30 is disposed so as to cover and cover the reflecting portion 20 and the entire reflecting portion 20 is not exposed, but in the present embodiment, the reflecting portion 20 is not exposed. A part of is exposed.

  As mentioned above, the effect similar to Embodiment 1 is acquired also about the lighting fixture 2 in this Embodiment.

  That is, since the outer surface of the translucent member 30A protrudes toward the light source unit 10, the luminance in the translucent member 30A can be suppressed, and glare can be reduced.

  In addition, since the translucent member 30A is arranged so as to cover a part of the reflecting portion 20, it is possible to suppress the progress of dirt on the reflecting portion 20 as compared with the case where the entire reflecting portion 20 is exposed, The degree of maintenance rate decline can be suppressed. However, as in the first embodiment, the effect of suppressing the decrease in the maintenance rate is greater when the entire reflecting portion 20 is hidden.

  In addition, the lighting fixture 2 in the present embodiment is also configured with a small amount of modeling, so that it can be clearly seen and a three-dimensional effect peculiar to the embedded lighting fixture can be felt.

  Note that this embodiment can also be applied to the following embodiments.

(Embodiment 3)
Next, the lighting fixture 3 which concerns on Embodiment 3 of this invention is demonstrated using FIG. 5A and 5B. FIG. 5A is a perspective view of the lighting fixture according to Embodiment 3 of the present invention when viewed obliquely from below, and FIG. 5B is a partial cross-sectional view (cross-sectional view taken through the optical axis J) of the lighting fixture. .

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

  The difference between the lighting fixture 3 in the present embodiment and the lighting fixture 1 in the first embodiment is that, in the first embodiment, the outer peripheral end portion of the translucent member 30 is in contact with the inner surface of the frame 50 and is on the ceiling surface. In contrast, the outer peripheral end portion of the translucent member 30B is configured to protrude from the opening of the ceiling along the ceiling surface.

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

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

  A flange 31 is formed at the outer peripheral end of the translucent member 30B. The flange 31 is formed over the circumferential direction so as to protrude outward in the radial direction. When the lighting fixture 3 is disposed on the ceiling, the flange 31 of the translucent member 30 </ b> B projects along the ceiling surface so as to cover the flange 24 of the reflecting portion 20. In the present embodiment, the flange 31 of the translucent member 30 </ b> B extends beyond the flange 24 of the reflecting portion 20.

  As mentioned above, the effect similar to Embodiment 1 is acquired also about the lighting fixture 3 in this Embodiment.

  That is, since the outer surface of the translucent member 30B protrudes toward the light source unit 10, the luminance in the translucent member 30B can be suppressed and the glare can be reduced.

  In addition, in the present embodiment, since the flange 31 is formed at the outer peripheral end of the translucent member 30B from the ceiling opening along the ceiling surface, the translucent member 30B is compared with the first embodiment. It is possible to further increase the light emission area of pseudo light emission. Therefore, since the brightness in the translucent member 30B can be suppressed as compared with the first embodiment, the glare can be further reduced.

  Also in the present embodiment, similarly to the first embodiment, the translucent member 30 </ b> B is arranged so as to cover the entire reflecting portion 20. Thereby, the progress of the contamination of the reflection part 20 can be suppressed, and the degree of decrease in the maintenance rate can be suppressed as in the first embodiment.

  In addition, the lighting fixture 3 in the present embodiment is also configured with a small amount of modeling, so that it can be clearly seen, and a three-dimensional feeling peculiar to the embedded lighting fixture can be felt.

  In the present embodiment, the translucent member 30B has a flat central portion facing the light source unit 10 on the outer surface. This makes it possible to increase the distance between the light source unit 10 and the translucent member 30B and increase the distance between the light source unit 10 and the translucent member 30B as compared with the case where the light source unit 10 is projected even to the center portion. The brightness can be suppressed.

  Note that this embodiment can also 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 reflecting portion 20, but the ceiling is formed by the flange 51 of the frame body 50 using the frame body 50 as in the first embodiment. It may be locked to. In this case, the flange 31 of the translucent member 30 </ b> B extends beyond the flange 51 of the frame body 50.

(Embodiment 4)
Next, the lighting fixture 4 which concerns on Embodiment 4 of this invention is demonstrated using FIG. 6A and 6B. FIG. 6A is a perspective view of the lighting fixture according to Embodiment 4 of the present invention when viewed obliquely from below, and FIG. 6B is a partial cross-sectional view (cross-sectional view taken through the optical axis J) of the lighting fixture. .

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

  The difference between the lighting fixture 4 in the present embodiment and the lighting fixture 1 in the first embodiment is that, as in the third embodiment, in the present embodiment, the outer peripheral end of the translucent 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 translucent member 30 </ b> C extends beyond the flange 24 so as to cover the flange 24 of the reflector 20.

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

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

  A side wall portion 32 that covers the flange 24 of the reflecting portion 20 is formed at the outer peripheral end portion of the translucent member 30C. 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 mentioned above, the effect similar to Embodiment 1 is acquired also about the lighting fixture 4 in this Embodiment.

  That is, since the outer surface of the translucent member 30C protrudes toward the light source unit 10, the luminance in the translucent member 30C can be suppressed, and glare can be reduced.

  Moreover, in the present embodiment, as in the second embodiment, the side wall portion 32 that extends from the opening of the ceiling along the ceiling surface is formed at the outer peripheral end of the translucent member 30C. The luminance in the translucent member 30 </ b> C can be suppressed more than 1, and the glare can be further reduced.

  In this case, in the present embodiment, the side wall portion 32 is formed so as to cover even the side portion of the flange 24 of the reflecting portion 20. Thereby, since the light guided through the translucent member 30C is emitted from the side wall portion 32 along the ceiling surface, the irradiation range can be widened.

  Also in the present embodiment, similarly to the first and second embodiments, the translucent member 30C is arranged so as to cover the entire reflecting portion 20, so that the maintenance rate decreases as in the first and second embodiments. The degree can be suppressed.

  In addition, the lighting fixture 4 in the present embodiment is also configured with a small amount of modeling, so that it can be clearly seen and a three-dimensional effect unique to the embedded lighting fixture can be felt.

  Further, in the present embodiment, the radius of curvature of the outer surface and the inner surface of the translucent member 30C is larger than the radius of curvature of the outer surface and the inner surface of the translucent member 30 in the first embodiment. Thereby, compared with Embodiment 1, the distance of the light source part 10 and the translucent member 30C can be enlarged, and the light source part 10 and the translucent member 30C can be kept away, and a brightness | luminance is suppressed effectively. it can.

  Note that this embodiment can also be applied to other embodiments. Also in the present embodiment, the luminaire 4 may be fixed to the ceiling using the frame 50. In this case, the flange 31 of the translucent member 30 </ b> C extends beyond the flange 51 of the frame body 50.

(Other variations)
As mentioned above, although the lighting fixture which concerns on this invention was demonstrated based on embodiment, this invention is not limited to these embodiment.

  For example, if the translucent member protrudes to the light source unit 10 as a whole, as shown in FIG. 7, a part of the translucent member protrudes to the opposite side (downward side) from the light source unit 10. It does not matter. In this case, the portion protruding downward can be formed in a curved shape as shown in FIG. 7, for example.

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

  Moreover, in the said embodiment, although the thickness of the translucent member was substantially constant, if the outer surface of the translucent member protrudes toward the light source part 10, the thickness of the translucent member may not be constant. For example, as shown in FIG. 9, a translucent member 30 </ b> F having a flat outer surface (surface on the light source unit 10 side) and a curved outer surface may be used.

  Moreover, in the said embodiment, although the spreading | diffusion degree of the translucent member was made constant, it is not restricted to this. For example, like the translucent member 30G shown in FIG. 10, the degree of diffusion may gradually decrease from the center toward the periphery. In this case, the translucent member 30G can be configured such that the central portion has a diffusion function and the peripheral portion does not have a diffusion function. That is, the peripheral portion can be a light transmission portion that does not have light diffusibility. In addition, you may give the light transmission part the lens function of a condensing effect | action and a divergence effect | action with respect to the light from the light source part 10 as needed.

  Alternatively, as in the translucent member 30 </ b> H 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 be configured to be higher. In this case, for example, a milky white light diffusion film may be formed in the central portion of the translucent member 30F (silk printing), and a dot pattern may be formed in the peripheral portion of the translucent member 30H. That is, the translucent member may be configured using a plurality of different diffusing means.

  Moreover, in the said embodiment, although the light source part 10 was comprised so that white light might be emitted by blue LED and yellow fluorescent substance, it is not restricted to this. For example, a phosphor-containing resin containing a red phosphor and a green phosphor may be used so that white light is emitted by combining this with a blue LED.

  Moreover, in the said embodiment, although LED12 used the LED chip which light-emits blue, it is not restricted to this. As LED12, you may use the LED chip which light-emits colors other than blue. For example, when an LED chip that emits ultraviolet rays is used as the LED 12, a combination of phosphor particles that emit light in three primary colors (red, green, and blue) can be used as the phosphor particles. Furthermore, a wavelength conversion material other than the phosphor particles may be used. For example, the wavelength conversion material absorbs light of a certain wavelength such as a semiconductor, a metal complex, an organic dye, or a pigment, and has a wavelength different from the absorbed light A material containing a substance that emits light may be used.

  Moreover, in the said embodiment, although the light source part 10 (LED light source) was set as the COB (Chip On Board) structure which mounted the LED chip directly on the board | substrate 11, it is not restricted to this. For example, instead of a 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 resin package (container) and a sealing member (phosphor-containing resin) is enclosed in the recess. (SMD LED element) is mounted on a substrate.

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

  In addition, the embodiment can be realized by arbitrarily combining the components and functions in each embodiment without departing from the scope of the present invention, or a form obtained by subjecting each embodiment to various modifications conceived by those skilled in the art. Forms are also included in the present invention.

DESCRIPTION OF SYMBOLS 1 Lighting fixture 10 Light source part 20 Reflecting part 21 Incidence port 22 Reflecting surface 23 Outlet port 30 Translucent member

Claims (10)

A light source unit;
A reflection part for reflecting light emitted from the light source part;
A light diffusing member disposed so as to cover at least a part of the reflecting portion, and
An outer surface of the translucent member projects toward the light source unit. The lighting fixture according to claim 1, wherein the translucent member is configured such that at least a part of the outer surface is curved. The lighting fixture according to claim 2, wherein the translucent member is curved so that the entire outer surface protrudes toward the light source unit. The translucent member is configured such that a central portion of the outer surface facing the light source unit is a flat surface, and a peripheral portion around the central portion of the outer surface is a curved surface. The lighting fixture of 2. The lighting device according to claim 1, wherein the translucent member is disposed so as not to expose the reflection portion. The translucent member is configured such that a diffusion degree of a central part facing the light source unit is higher than a diffusion degree of a peripheral part around the central part. The luminaire described. The lighting device according to claim 1, wherein the translucent member is configured such that the degree of diffusion decreases from the center toward the periphery. The reflector includes a light entrance that is formed so as to surround the light source, a reflective surface that reflects light incident from the light entrance, and a light exit that emits light reflected by the reflective surface. The lighting fixture according to any one of claims 1 to 7. The lighting device according to claim 8, wherein the translucent member is disposed such that an outer peripheral end portion of the translucent member is in contact with an outer peripheral end portion of the emission port of the reflecting portion. The luminaire is a downlight embedded in a ceiling opening,
The lighting fixture according to any one of claims 1 to 9, wherein an outer peripheral end portion of the translucent member is configured to protrude from the opening portion along a ceiling surface.