JP7029668B2 - lighting equipment - Google Patents

Description

The present invention relates to a lighting fixture for illuminating a room or the like.

Ceiling lights are known as one of the lighting fixtures for illuminating a room. The ceiling light includes a fixture body mounted on the ceiling of the room, a light emitting module supported by the fixture body, and a light guide plate that guides the light emitted from the light emitting module and illuminates the room (for example,). See Patent Document 1). The light guide plate is fixed to the instrument body by, for example, a screw.

Japanese Patent No. 4991013

In recent years, increasing the size of the light guide plate has been studied. When the weight of the light guide plate is increased due to the increase in size, the light guide plate may become unstable simply by fixing the light guide plate with screws. Further, since the fixing with screws is a point fixing, stress is concentrated on the fixing portion when the light guide plate is thermally deformed, and there is a possibility that it becomes more unstable.

An object of the present invention is to provide a lighting fixture capable of stably holding a light guide plate.

In order to solve the above-mentioned problems, in the lighting fixture according to one aspect of the present invention, the annular light guide plate is fixed to the fixture main body inside the fixture main body, the annular light guide plate, and the annular light guide plate, and the annular light guide plate is attached to the fixture main body. The fixing member is provided along the inner peripheral portion of the annular light guide plate, and has an outer support portion that abuts on the inner peripheral portion and supports the annular light guide plate.

According to the lighting fixture according to one aspect of the present invention, the light guide plate can be stably held.

It is a perspective view which shows the appearance of the luminaire according to Embodiment 1 on the floor surface side. It is a perspective view which shows the appearance of the ceiling side of the lighting fixture which concerns on Embodiment 1. FIG. It is an exploded perspective view which shows by disassembling the lighting equipment which concerns on Embodiment 1. FIG. It is a top view which shows the lighting fixture which concerns on Embodiment 1. FIG. It is a side view which shows the lighting fixture which concerns on Embodiment 1. FIG. It is sectional drawing of the luminaire according to Embodiment 1 by the VI-VI line of FIG. FIG. 6 is a cross-sectional view of a main part of the lighting fixture according to the first embodiment, showing a part of FIG. 6 in an enlarged manner. FIG. 6 is a cross-sectional perspective view of a main part of the lighting fixture according to the first embodiment, showing a part of FIG. 6 in an enlarged manner. It is a top view which shows by extracting the light emitting module which concerns on Embodiment 1. FIG. It is a top view which shows by pulling out the 1st light guide plate which concerns on Embodiment 1. FIG. It is sectional drawing of the main part which shows the part of the 1st light guide plate which concerns on Embodiment 1 in a schematic enlargement. It is sectional drawing of the main part which shows the part of the 2nd light guide plate which concerns on Embodiment 1 in a schematic enlargement. It is a perspective view which looked at the fixing member which concerns on Embodiment 1 from the floor surface side. It is a perspective view which looked at the fixing member which concerns on Embodiment 1 from the ceiling side. It is sectional drawing which shows the 1st light guide plate which concerns on Embodiment 2. FIG. It is sectional drawing which shows the structure of the fixing member which concerns on Embodiment 3 and around it.

Hereinafter, embodiments of the present invention will be described. In addition, all of the embodiments described below show a preferable specific example of the present invention. Therefore, the numerical values, shapes, materials, components, the arrangement positions of the components, the connection form, and the like shown in the following embodiments are examples and are not intended to limit the present invention. Therefore, among the components in the following embodiments, the components not described in the independent claims indicating the highest level concept of the present invention will be described as arbitrary components.

Further, each figure is a schematic view and is not necessarily exactly shown. In each figure, the same reference numerals are given to substantially the same configurations, and duplicate explanations will be omitted or simplified.

(Embodiment 1)
Hereinafter, the lighting fixture according to the first embodiment will be described.

[1-1. Lighting equipment configuration]
[1-1-1. Overview of lighting equipment]
An outline of the lighting fixture 2 according to the first embodiment will be described with reference to FIGS. 1 to 4. FIG. 1 is a perspective view showing the appearance of the lighting fixture 2 according to the first embodiment on the floor surface side. FIG. 2 is a perspective view showing the appearance of the lighting fixture 2 according to the first embodiment on the ceiling side. FIG. 3 is an exploded perspective view showing the lighting fixture 2 according to the first embodiment in an exploded manner. FIG. 4 is a plan view showing the lighting fixture 2 according to the first embodiment.

The luminaire 2 is, for example, a ceiling light for illuminating a room, and is installed on a ceiling 4 (see FIG. 3) in the room. As shown in FIGS. 1 to 4, the lighting fixture 2 includes a fixture main body 6, a function box 8, an fixture mounting member 10, a light emitting module 12, a reflector 14, a first light guide plate 16, and a second light fixture. It includes a light guide plate 18, a fixing member 20, and a cover member 22.

Hereinafter, each component of the lighting fixture 2 will be described in detail. In each of the figures shown below, the negative side of the Z-axis represents the ceiling 4 side, and the positive side of the Z-axis represents the floor surface (not shown) side. Further, for convenience of explanation, in FIGS. 1, 3, 5, 5 to 8, 11 and 12, the lighting fixture 2 is shown in an upside-down posture from the posture during normal use. ..

[1-1-2. Instrument body]
First, the instrument main body 6 will be described with reference to FIGS. 2, 3, 5, and 6. FIG. 5 is a side view showing the lighting fixture 2 according to the first embodiment. FIG. 6 is a cross-sectional view of the luminaire 2 according to the first embodiment according to the VI-VI line of FIG.

The instrument body 6 is a housing for supporting the light emitting module 12 and the like. As shown in FIGS. 2, 3, 5, and 6, the instrument main body 6 is formed in an annular shape having a circular opening 24 at the center in an XY plan view. As shown in FIG. 6, the center of the diameter of the opening 24 of the fixture body 6 is located on the central axis 26 of the luminaire 2. The central axis 26 is a straight line parallel to the Z axis. The instrument body 6 is formed into the above-mentioned shape by pressing a sheet metal such as an aluminum plate or a steel plate, for example.

[1-1-3. Function box]
Next, the function box 8 will be described with reference to FIGS. 2, 3, 5, and 6. As shown in FIGS. 2, 3, 5, and 6, the function box 8 has a case 28 and a circuit unit 30. For convenience of explanation, the circuit unit 30 is shown only in FIG.

The case 28 is a hollow box for accommodating the circuit unit 30. The case 28 is formed in a substantially rectangular shape in XY plan view. As shown in FIGS. 2, 3 and 5, the case 28 is connected to the side surface 32 on the ceiling 4 side of the instrument main body 6 via a plurality of connecting members 34. That is, in a state where the lighting fixture 2 is installed on the ceiling 4, the fixture main body 6 is supported so as to be suspended from the case 28 via a plurality of connecting members 34. A circular through hole 36 is formed in the central portion of the case 28. As shown in FIG. 6, a cylindrical holder 38 for mounting the functional box 8 on the instrument mounting member 10 is fixed to the through hole 36 of the case 28. An instrument mounting member 10 is detachably fitted inside the holder 38.

The circuit unit 30 is a unit for generating electric power for lighting the light emitting module 12 and controlling the lighting of the light emitting module 12. As shown in FIG. 2, the circuit unit 30 is arranged inside the case 28. Although not shown for convenience of explanation, the circuit unit 30 includes a substrate and a plurality of circuit components mounted on the substrate.

The board is a printed wiring board for mounting a plurality of circuit components. As shown in FIG. 3, the substrate is electrically connected to the light emitting module 12 via the electric wire 40, and is electrically connected to the fixture mounting member 10 via the electric wire 42.

A plurality of circuit components are mounted on the mounting surface of the board. The plurality of circuit components include a power supply circuit component and a control circuit component. The power supply circuit component constitutes a power supply circuit for generating electric power for lighting the light emitting module 12. The power supply circuit converts the AC power supplied from the commercial power supply (not shown) via the hook sealing body 44 (described later) into DC power, and supplies the DC power to the light emitting module 12. The DC power generated by the power supply circuit is supplied to the light emitting module 12, so that the light emitting module 12 lights up. Further, the control circuit component constitutes a control circuit for controlling the lighting of the light emitting module 12.

The plurality of circuit components include, for example, a) a capacitive element such as an electrolytic capacitor or a ceramic capacitor, b) a resistance element such as a resistor, c) a rectifying circuit element, d) a coil element, and e) a choke coil (choke transformer). , F) Noise filters, g) Semiconductor devices such as diodes or integrated circuit devices and the like.

[1-1-4. Instrument mounting member]
Next, the instrument mounting member 10 will be described with reference to FIGS. 2, 3, and 6. The fixture mounting member 10 is an adapter for detachably mounting the function box 8 on the hook ceiling body 44 installed on the ceiling 4 in the room.

As shown in FIGS. 2, 3 and 6, the instrument mounting member 10 is detachably fitted inside the holder 38 of the case 28 of the functional box 8. Further, the instrument mounting member 10 is detachably attached to the hook sealing body 44.

When installing the lighting fixture 2 on the ceiling 4 in the room, the user first hooks the fixture mounting member 10 and attaches it to the ceiling body 44. After that, the user fits the holder 38 and the fixture mounting member 10 by pushing the function box 8 toward the ceiling 4 so that the fixture mounting member 10 is inserted into the holder 38 of the case 28. As a result, the functional box 8 is attached to the ceiling 4 in the room via the fixture mounting member 10 and the hook ceiling body 44, and the lighting fixture 2 is installed on the ceiling 4 in the room.

The hook ceiling body 44 is electrically connected to, for example, a commercial power source arranged on the back side of the ceiling 4 in the room via an electric wire (not shown). By installing the luminaire 2 on the ceiling 4 in the room, AC power from the commercial power source is supplied to the luminaire 2 via the electric wire and the hook sealing body 44.

[1-1-5. Luminous module]
Next, the light emitting module 12 will be described with reference to FIGS. 3 and 6 to 9. FIG. 7 is a cross-sectional view of a main part of the lighting fixture 2 according to the first embodiment, showing a part of FIG. 6 in an enlarged manner. FIG. 8 is a cross-sectional perspective view of a main part of the lighting fixture 2 according to the first embodiment, showing a part of FIG. 6 in an enlarged manner. FIG. 9 is a plan view showing an extracted light emitting module 12 according to the first embodiment.

As shown in FIGS. 3 and 6, the light emitting module 12 is, for example, a light source for emitting white light. As shown in FIGS. 3 and 7 to 9, the light emitting module 12 includes a plurality of substrates 46, a plurality of first light emitting elements 48 (an example of a first light emitting unit) mounted on each of the plurality of substrates 46, and a plurality of first light emitting elements 48 (an example of a first light emitting unit). It has a plurality of second light emitting elements 50 (an example of a second light emitting unit).

Each of the plurality of substrates 46 is a printed wiring board for mounting the plurality of first light emitting elements 48 and the plurality of second light emitting elements 50, and is formed in a substantially arc shape. The plurality of substrates 46 are attached to the side surface 52 of the instrument main body 6 on the floor surface side, and are arranged in an annular shape so as to surround the opening 24 of the instrument main body 6. As the substrate 46, for example, a resin substrate, a metal base substrate, a ceramic substrate, a glass substrate, or the like can be used. Further, the substrate 46 is not limited to a rigid substrate, and may be a flexible substrate.

The plurality of first light emitting elements 48 are mounted on the inner peripheral portion side of the mounting surface (floor surface side surface) of each substrate 46. Specifically, the plurality of first light emitting elements 48 are arranged in an arc shape on the inner peripheral side of the mounting surface of each substrate 46 at intervals along the circumferential direction of each substrate 46. As a result, the plurality of first light emitting elements 48 are arranged in an annular shape in the entire light emitting module 12.

The plurality of second light emitting elements 50 are mounted on the outer peripheral side of the mounting surface of each substrate 46. Specifically, the plurality of second light emitting elements 50 are arranged in an arc shape on the outer peripheral side of the mounting surface of each substrate 46 at intervals in the circumferential direction of each substrate 46. As a result, in the entire light emitting module 12, the plurality of second light emitting elements 50 are arranged in an annular shape so as to surround the plurality of first light emitting elements 48.

Each of the first light emitting element 48 and the second light emitting element 50 is, for example, a packaged surface mount (SMD: Surface Mount Device) type white LED element. That is, each of the first light emitting element 48 and the second light emitting element 50 is enclosed in a white resin package (container) having a recess, an LED chip primarily mounted on the bottom surface of the recess of the package, and the recess of the package. It has a sealed member. The LED chip is, for example, a blue LED chip that emits blue light. The sealing member contains a yellow phosphor such as YAG (yttrium aluminum garnet) that fluoresces with blue light from a blue LED chip as excitation light.

As described above, each of the first light emitting element 48 and the second light emitting element 50 is a BY type white LED element composed of a blue LED chip and a yellow phosphor. Specifically, the yellow phosphor contained in the sealing member is excited by absorbing a part of the blue light from the blue LED chip and emits the yellow light. White light is generated by mixing the emitted yellow light with the blue light that is not absorbed by the yellow phosphor. In this way, white light is emitted from each of the first light emitting element 48 and the second light emitting element 50.

In the present embodiment, the first light emitting element 48 and the second light emitting element 50 both emit white light, but light of different colors (wavelengths) may be emitted. For example, the first light emitting element 48 may emit white light, and the second light emitting element 50 may emit light bulb-colored light.

[1-1-6. a reflector]
Next, the reflector 14 will be described with reference to FIGS. 3 and 6 to 8. The reflector 14 is for reflecting the light emitted from the back surface 64 of the first emission portion 58 (described later) of the first light guide plate 16.

As shown in FIG. 3, the reflector 14 is formed in a circular shape in an XY plan view. A reflective surface 54 coated with, for example, a white paint is formed on the side surface of the reflector 14 on the floor surface side. As shown in FIGS. 6 to 8, the reflector 14 is arranged on the side surface 52 of the instrument body 6 on the floor side so as to cover the opening 24 of the instrument body 6. At this time, the reflecting surface 54 of the reflecting plate 14 is arranged so as to face the back surface 64 of the first emitting portion 58 of the first light guide plate 16.

[1-1-7. First light guide plate]
Next, the first light guide plate 16 will be described with reference to FIGS. 1, 3, 4, 6, 6 to 8, 10 and 11. FIG. 10 is a plan view showing the first light guide plate 16 according to the first embodiment by extracting it. FIG. 11 is a sectional view of a main part schematically showing a part of the first light guide plate 16 according to the first embodiment in an enlarged manner.

The first light guide plate 16 is an optical member for diffusing the light from the plurality of first light emitting elements 48. The first light guide plate 16 is fixed to the side surface 52 of the instrument main body 6 on the floor surface side by the fixing member 20.

As shown in FIGS. 1, 3, 4, and 6, the first light guide plate 16 is formed in a circular shape in an XY plan view, and is arranged inside the second light guide plate 18. That is, the first light guide plate 16 is an example of the inner light guide plate. Specifically, the first light guide plate 16 has a first incident portion 56 and a first emitting portion 58. The first light guide plate 16 is made of a translucent material such as a transparent acrylic resin.

As shown in FIGS. 7 and 8, the diameter of the first incident portion 56 is reduced while being curved from one end portion 56a (the end portion on the ceiling 4 side) to the other end portion 56b (the end portion on the floor surface side). It is formed in a tubular shape. That is, the first incident portion 56 is the outer peripheral portion of the first light guide plate 16. The concave side of the first incident portion 56 faces the light emitting module 12, and the convex side of the first incident portion 56 faces the cover member 22. The first incident portion 56 guides light from one end portion 56a toward the other end portion 56b. An annular first end surface 60 is formed on one end 56a of the first incident portion 56 over the entire circumference thereof. The first end surface 60 is arranged at a position facing and close to the plurality of first light emitting elements 48. That is, the plurality of first light emitting elements 48 are arranged in an annular shape at intervals along the circumferential direction of the first end surface 60. The light from each of the plurality of first light emitting elements 48 is incident on the first end surface 60.

As shown in FIGS. 6 to 8, the first emitting portion 58 extends radially inward from the first light guide plate 16 from the entire circumference of the other end portion 56b of the first incident portion 56, and has a circular shape in XY plan view. It is formed. That is, the first emitting portion 58 is arranged in a substantially horizontal posture (that is, a posture substantially parallel to the ceiling 4) so as to close the other end portion 56b of the first incident portion 56. That is, as shown in FIG. 4, when the first light guide plate 16 and the second light guide plate 18 are viewed in a plan view, the first side surface 62 of the first light guide plate 16 includes the diameter center 61 of the second light guide plate 18. It is arranged in the area 63. The center of the diameter of the first emitting portion 58 is located on the central axis 26 of the luminaire 2. As shown in FIGS. 7 and 8, a first side surface 62 is formed on the floor surface side of the first exit portion 58. The first side surface 62 is a surface on which light is emitted, and is formed in a circular shape in an XY plan view.

As shown in FIG. 10, a light scattering pattern 68 is formed on the back surface 64 (the surface on the ceiling 4 side) opposite to the first side surface 62 of the first emission unit 58. As shown in FIG. 11, the light scattering pattern 68 is, for example, a pattern in which a plurality of low-angle prisms 66 (an example of a plurality of light scattering elements) are arranged in a dot shape. Each of the plurality of low-angle prisms 66 is a conical recess formed by, for example, dot processing. The light scattering pattern 68 is formed so that the density of the plurality of low-angle prisms 66 gradually increases as the back surface 64 (first side surface 62) approaches the inner peripheral portion from the outer peripheral portion. The density of the plurality of low-angle prisms 66 is highest at the center of diameter of the back surface 64 (first side surface 62) and lowest at the outer peripheral edge of the back surface 64 (first side surface 62). That is, the light scattering pattern 68 (shape of the first emission portion 58) extracts light from the inner peripheral portion of the first side surface 62 rather than the light extraction efficiency of the light extracted from the outer peripheral portion of the first side surface 62. It is formed so that the efficiency is higher. In FIG. 10, the densities of the plurality of low-angle prisms 66 are represented by shades of color. That is, in FIG. 10, the darker the color, the higher the density of the plurality of low-angle prisms 66, and the lighter the color, the lower the density of the plurality of low-angle prisms 66.

If the density of the plurality of low-angle prisms 66 is uniform over the entire area of the first side surface 62, the light extraction efficiency is uniform over the entire area of the first side surface 62. However, in this case, for example, when the diameter of the first emitting portion 58 is increased, it becomes difficult for the light from the plurality of first light emitting elements 48 to reach the inner peripheral portion of the first side surface 62, so that the first side surface The amount of light taken out at the inner peripheral portion of 62 is reduced. As a result, there arises a problem that the inner peripheral portion of the first side surface 62 becomes darker than the outer peripheral portion.

On the other hand, in the present embodiment, the density of the plurality of low-angle prisms 66 gradually increases as it approaches the inner peripheral portion from the outer peripheral portion of the first side surface 62, so that the density is gradually increased in the inner peripheral portion of the first side surface 62. The light extraction efficiency can be relatively high. As a result, even when the diameter of the first emitting portion 58 is increased, more light can be taken out from the inner peripheral portion of the first side surface 62, so that the inner peripheral portion of the first side surface 62 is the outer peripheral portion. It is possible to suppress the darkening of the part. As a result, the uneven brightness on the first side surface 62 can be reduced.

In the present embodiment, the light scattering pattern 68 is formed so that the density of the plurality of low-angle prisms 66 gradually increases as the light scattering pattern 68 approaches the inner peripheral portion from the outer peripheral portion of the back surface 64, but the present invention is not limited to this. .. For example, the light scattering pattern 68 may be formed so that the size of each of the plurality of low-angle prisms 66 gradually increases as the light scattering pattern 68 approaches the inner peripheral portion from the outer peripheral portion of the back surface 64. In this case, the size of the low-angle prism 66 is the largest at the center of the diameter of the back surface 64 (first side surface 62) and the smallest at the outer peripheral edge of the back surface 64 (first side surface 62). Alternatively, as the light scattering pattern 68 approaches the inner peripheral portion from the outer peripheral portion of the back surface 64, the density of the plurality of low-angle prisms 66 gradually increases, and the size of each of the plurality of low-angle prisms 66 gradually increases. It may be formed so as to be large.

As shown in FIG. 7, the light from the plurality of first light emitting elements 48 is incident on the first end surface 60 and is guided from the first incident portion 56 to the first emission portion 58. The light guided to the first emitting unit 58 is reflected by the low-angle prism 66, and is diffused from the first side surface 62 of the first emitting unit 58 and emitted toward the room.

A part of the light guided to the first emission unit 58 is emitted while being diffused from the back surface 64 of the first emission unit 58. The light emitted from the back surface 64 of the first emission unit 58 is reflected by the reflection surface 54 of the reflector 14 and then incident on the back surface 64 of the first emission unit 58. As a result, the light utilization efficiency of the first light guide plate 16 can be improved.

[1-1-8. Second light guide plate]
Next, the second light guide plate 18 will be described with reference to FIGS. 1 to 8 and 12. FIG. 12 is a sectional view of a main part schematically showing a part of the second light guide plate 18 according to the first embodiment in an enlarged manner.

The second light guide plate 18 is an optical member for diffusing the light from the plurality of second light emitting elements 50. The second light guide plate 18 is fixed to the side surface 52 on the floor surface side of the instrument main body 6 by the fixing member 20.

As shown in FIGS. 1 to 5, the second light guide plate 18 is formed in an annular shape (doughnut shape) in an XY plan view, and is arranged so as to surround the first light guide plate 16. That is, the second light guide plate 18 is an example of an annular light guide plate. Specifically, the second light guide plate 18 has a second incident portion 70 and a second emitting portion 72. The second light guide plate 18 is made of a translucent material such as a transparent acrylic resin.

As shown in FIGS. 6 to 8, the second incident portion 70 expands in diameter while being curved from one end portion 70a (the end portion on the ceiling 4 side) to the other end portion 70b (the end portion on the floor surface side). It is formed in a tubular shape. That is, the second incident portion 70 is the inner peripheral portion of the second light guide plate 18. The concave side of the second incident portion 70 faces the light emitting module 12, and the convex side of the second incident portion 70 faces the cover member 22. The second incident portion 70 guides the light from the one end portion 70a toward the other end portion 70b. An annular second end surface 74 is formed on one end 70a of the second incident portion 70 over the entire circumference thereof. The second end surface 74 is arranged at a position facing and close to the plurality of second light emitting elements 50. That is, the plurality of second light emitting elements 50 are arranged in an annular shape at intervals along the circumferential direction of the second end surface 74. The light from each of the plurality of second light emitting elements 50 is incident on the second end surface 74.

As shown in FIGS. 5 to 8, the second emitting portion 72 extends radially outward of the second light guide plate 18 from the entire circumference of the other end portion 70b of the second incident portion 70, and is annular (annular in XY plan view). It is formed in a donut shape). The second exit portion 72 projects radially outward from the second light guide plate 18 with respect to the instrument main body 6, and is arranged in a substantially horizontal posture. The center of the diameter of the second emitting portion 72 is located on the central axis 26 of the luminaire 2. As shown in FIGS. 7 and 8, a second side surface 76 is formed on the floor surface side of the second exit portion 72. The second side surface 76 is a surface on which light is emitted, and is formed in an annular shape in an XY plan view.

Further, as shown in FIG. 7, the second side surface 76 of the second emission unit 72 is arranged on substantially the same surface as the first side surface 62 of the first emission unit 58. In addition, in this specification, "arranged on substantially the same surface" is not only the case where the first side surface 62 and the second side surface 76 are arranged completely on the same surface, but also the first side surface 62. Is not included in the case where is deviated from the second side surface 76 in the Z-axis direction by a predetermined distance or less (for example, one tenth or less of the thickness of the first side surface 62 or the second side surface 76).

As shown in FIG. 12, a light scattering pattern 82 is formed on the back surface 78 (the surface on the ceiling 4 side) opposite to the second side surface 76 of the second emission unit 72. The light scattering pattern 82 is, for example, a pattern in which a plurality of low-angle prisms 80 are arranged in a dot shape. Each of the plurality of low-angle prisms 80 is a conical recess formed by, for example, dot processing. The light scattering pattern 82 is formed so that the densities of the plurality of low-angle prisms 80 are substantially uniform over the entire back surface 78. That is, the light scattering pattern 82 is formed so that the light extraction efficiency is substantially uniform over the entire area of the second side surface 76.

As shown in FIG. 7, the light from the plurality of second light emitting elements 50 enters the second end surface 74 and is guided from the second incident portion 70 to the second emitting portion 72. The light guided to the second emitting unit 72 is reflected by the low-angle prism 80, and is diffused from the second side surface 76 of the second emitting unit 72 and emitted toward the room. A part of the light guided to the second emission unit 72 is emitted while being diffused from the back surface 78 of the second emission unit 72.

Further, as shown in FIGS. 7 and 12, the outer peripheral surface 84 of the second emitting portion 72 is formed in a tapered shape whose diameter increases from the second side surface 76 of the second emitting portion 72 toward the back surface 78. A part of the light guided to the second emitting unit 72 is emitted while being diffused from the outer peripheral surface 84 of the second emitting unit 72.

[1-1-9. Fixing member]
Next, the fixing member 20 will be described with reference to FIGS. 3, 6 to 8, 13 and 14. FIG. 13 is a perspective view of the fixing member according to the first embodiment as viewed from the floor surface side. FIG. 14 is a perspective view of the fixing member according to the first embodiment as viewed from the ceiling side. The fixing member 20 is a member for fixing the first light guide plate 16 and the second light guide plate 18 to the side surface 52 on the floor surface side of the instrument main body 6. The fixing member 20 is arranged in a non-light emitting region between the first incident portion 56 of the first light guide plate 16 and the second incident portion 70 of the second light guide plate 18. The fixing member 20 is made of, for example, a resin having no translucency.

As shown in FIGS. 13 and 14, the fixing member 20 is formed in an annular shape (doughnut shape) in an XY plan view. That is, the fixing member 20 is continuously provided over the entire circumference of the second light guide plate 18. The first light guide plate 16, the second light guide plate 18, and the fixing member 20 are concentric circles. The fixing member 20 may be formed of a single member as a whole, or may be formed by combining a plurality of members. Further, the fixing member 20 does not project from the second side surface 76 of the second emitting portion 72 and the first side surface 62 of the first emitting portion 58 toward the floor surface 4. That is, the fixing member 20 is arranged at a position deeper than the second side surface 76 and the first side surface 62 (see FIGS. 7 and 8).

The fixing member 20 includes an inner support portion 210 for supporting the first light guide plate 16 and an outer support portion 220 for supporting the second light guide plate 18.

The inner support portion 210 is an inner peripheral surface of the fixing member 20, and is formed in a continuous annular shape over the entire circumference of the fixing member 20. The inner support portion 210 has a curved surface recessed toward the outer support portion 220 side. Specifically, the inner support portion 210 is formed on a curved surface corresponding to the convex surface of the first incident portion 56 (outer peripheral portion) of the first light guide plate 16 (see FIGS. 7 and 8). That is, the inner support portion 210 has a shape that follows the outer peripheral portion of the first light guide plate 16 in both the circumferential direction and the radial direction. As described above, since the inner support portion 210 has a shape along the outer peripheral portion of the first light guide plate 16, when the inner support portion 210 comes into contact with the outer peripheral portion of the first light guide plate 16, the inner support portion 210 is attached to the outer peripheral portion. Face-to-face contact. That is, the inner support portion 210 of the fixing member 20 is in contact with the convex surface side of the first incident portion 56 of the first light guide plate 16 toward the side surface 52 on the floor surface side of the instrument main body 6, and the first light guide plate is in contact with the side surface 52. 16 is supported from the floor surface side.

The outer support portion 220 is an outer peripheral surface of the fixing member 20, and is formed in a continuous annular shape over the entire circumference of the fixing member 20. The outer support portion 220 has a curved surface recessed toward the inner support portion 210 side. Specifically, the outer support portion 220 is formed on a curved surface corresponding to the convex surface of the second incident portion 70 (inner peripheral portion) of the second light guide plate 18 (see FIGS. 7 and 8). That is, the outer support portion 220 has a shape that follows the inner peripheral portion of the second light guide plate 18 in both the circumferential direction and the radial direction. As described above, since the outer support portion 220 has a shape along the inner peripheral portion of the second light guide plate 18, when the outer support portion 220 comes into contact with the inner peripheral portion of the second light guide plate 18, the inner peripheral portion thereof is concerned. Surface contact with the peripheral part. That is, the outer support portion 220 of the fixing member 20 is in contact with the convex surface side of the second incident portion 70 of the second light guide plate 18 toward the side surface 52 on the floor surface side of the instrument main body 6, and the second light guide plate is in contact with the side surface 52. 18 is supported from the floor surface side.

Further, the fixing member 20 has an intermediate portion 230 between the inner support portion 210 and the outer support portion 220. The intermediate portion 230 is formed in a continuous annular shape over the entire circumference of the fixing member 20. In the intermediate portion 230, a plurality of fixing portions 231 fixed to the instrument main body 6 and a plurality of accommodating portions 237 accommodating connectors and wiring for electrically connecting the plurality of boards 46 are alternately arranged in the circumferential direction. Is located in. In this embodiment, a case where four fixing portions 231 and four accommodating portions 237 are provided is illustrated.

The fixing portion 231 includes a bottom portion 232, an inner wall portion 233, an outer wall portion 234, and a rib 235. The bottom portion 232 has a through hole 2321, and is screwed to the side surface 52 on the floor surface side of the instrument main body 6 by, for example, a screw (not shown) through the through hole 2321. The inner wall portion 233 is a wall portion erected from the inner peripheral edge of the bottom portion 232, and the inner peripheral surface thereof serves as the inner support portion 210. The outer wall portion 234 is a wall portion erected from the outer peripheral edge of the bottom portion 232, and the outer peripheral surface thereof serves as the outer support portion 220. The bottom portion 232, the inner wall portion 233, and the outer wall portion 234 have a substantially uniform wall thickness as a whole.

The rib 235 extends along the radial direction of the fixing member 20, that is, along the radial direction of the second light guide plate 18. A plurality of ribs 235 are provided for one fixing portion 231. Specifically, the rib 235 is provided on the bottom portion 232 in a continuous wall shape between the inner wall portion 233 and the outer wall portion 234. Since a plurality of ribs 235 along the radial direction of the second light guide plate 18 are provided for one fixing member 20, the fixing member 20 can be reinforced in the radial direction, and the fixing member 20 can be reinforced. It is possible to suppress radial bending. That is, the rigidity of the fixing member 20 is increased. As a result, even if the larger second light guide plate 18 is fixed by the fixing member 20, stable fixing is possible.

The accommodating portion 237 is a portion that connects adjacent fixed portions 231 and is provided with an accommodating recess 238 for accommodating a connector, wiring, and the like on the surface on the ceiling 4 side thereof. The inner peripheral surface of the accommodating portion 237 on the first light guide plate 16 side is the inner support portion 210. On the other hand, the outer peripheral surface of the accommodating portion 237 on the second light guide plate 18 side is the outer support portion 220.

[1-1-10. Cover member]
Next, the cover member 22 will be described with reference to FIGS. 1, 3, 4, 7, and 8. The cover member 22 is a decorative cover for blindfolding the fixing member 20.

As shown in FIGS. 1, 3 and 4, the cover member 22 is formed in an annular shape (doughnut shape) in XY plan view, and is formed of, for example, a resin having no translucency. That is, the cover member 22 has a light-shielding property. The cover member 22 is arranged so as to cover the fixing member 20, and is detachably attached to the fixing member 20.

As shown in FIGS. 1, 3 and 4, a first light guide member 86 is arranged on the inner peripheral portion of the cover member 22. The first light guide member 86 is formed in an annular shape along the entire circumference of the inner peripheral portion of the cover member 22. The first light guide member 86 is made of a translucent material (for example, a milky white acrylic resin or the like). As shown in FIGS. 7 and 8, the first light guide member 86 is arranged so as to cover the convex surface side of the first incident portion 56 of the first light guide plate 16.

A part of the light incident on the first incident portion 56 of the first light guide plate 16 is emitted from the convex surface side of the first incident portion 56 and is incident on the first light guide member 86. The light incident on the first light guide member 86 is emitted from the first light guide member 86 toward the room (that is, the outside of the lighting fixture 2). As a result, the light incident on the first incident portion 56 of the first light guide plate 16 can be used to cause the first light guide member 86 to emit light.

As shown in FIGS. 1, 3 and 4, a second light guide member 88 is arranged on the outer peripheral portion of the cover member 22. The second light guide member 88 is formed in an annular shape along the entire circumference of the outer peripheral portion of the cover member 22. The second light guide member 88 is made of a translucent material like the first light guide member 86. As shown in FIGS. 7 and 8, the second light guide member 88 is arranged so as to cover the convex surface side of the second incident portion 70 of the second light guide plate 18.

A part of the light incident on the second incident portion 70 of the second light guide plate 18 is emitted from the convex side of the second incident portion 70 and is incident on the second light guide member 88. The light incident on the second light guide member 88 is emitted from the second light guide member 88 toward the room. As a result, the light incident on the second incident portion 70 of the second light guide plate 18 can be used to cause the second light guide member 88 to emit light.

[1-2. effect]
The lighting fixture 2 of the present embodiment is a second light guide plate in a state of being fixed to the fixture main body 6 inside the fixture main body 6, the second light guide plate 18 (annular light guide plate), and the second light guide plate 18. A fixing member 20 for fixing the 18 to the instrument main body 6 is provided, and the fixing member 20 is provided along the second incident portion 70 (inner peripheral portion) of the second light guide plate 18 and abuts on the second incident portion 70. It has an outer support portion 220 that supports the second light guide plate 18.

According to this, since the outer support portion 220 that supports the second light guide plate 18 is provided along the second incident portion 70 of the second light guide plate 18, the outer support portion 220 is attached to the second light guide plate 18. It can be brought into surface contact with each other. That is, the second light guide plate 18 can be supported with a large contact area as compared with the case where the second light guide plate 18 is directly fixed to the instrument main body 6 with screws. Therefore, it is possible to stably hold the second light guide plate 18. If stable holding is possible, the size of the second light guide plate 18 can be increased.

Further, since the outer support portion 220 supports the second light guide plate 18 by simply abutting the second light guide plate 18, even if the second light guide plate 18 is thermally deformed, the second light guide plate 18 is the surface of the outer support portion 220. It will slip in the direction. That is, since the stress is not concentrated on the contact portion, the influence of thermal deformation can be suppressed, and the second light guide plate 18 can be held more stably.

Further, the fixing member 20 is continuously provided over the entire circumference of the second light guide plate 18.

According to this, since the fixing member 20 is continuously provided over the entire circumference of the second light guide plate 18, the outer support portion 220 can also be formed over the entire circumference of the second light guide plate 18. Therefore, the contact area between the outer support portion 220 and the second light guide plate 18 can be made larger, and the second light guide plate 18 can be held more stably.

Further, the fixing member 20 has a plurality of ribs 235 extending along the radial direction of the second light guide plate 18.

Here, in order to stably fix the second light guide plate 18, it is conceivable to increase the rigidity of the fixing member 20. If the fixing member 20 is simply formed solidly, the weight of the fixing member 20 will increase. However, as described above, if the fixing member 20 is provided with a plurality of ribs 235 extending along the radial direction of the second light guide plate 18, these ribs 235 increase the rigidity of the fixing member 20. Can be done. As a result, even if the larger second light guide plate 18 is fixed by the fixing member 20, stable fixing is possible. Further, since a space can be provided between the plurality of ribs 235, it is possible to suppress an increase in the weight of the fixing member 20.

Further, the lighting fixture 2 includes a light-shielding cover member 22 that covers the fixing member 20 from the side opposite to the second light guide plate 18.

According to this, since the fixing member 20 is covered with the light-shielding cover member 22, the leaking light caused by the fixing member 20 can be shielded by the cover member 22. Therefore, the leaked light from the outside of the luminaire 2 becomes inconspicuous. Further, since the fixing member 20 itself is also covered with the cover member 22, the fixing member 20 itself becomes inconspicuous. As a result, the aesthetic appearance of the lighting fixture 2 can be enhanced.

Further, the lighting fixture 2 includes a first light guide plate 16 (inner light guide plate) which is inside the second light guide plate 18 and is arranged at a position sandwiching the fixing member 20 together with the second light guide plate 18. The fixing member 20 is provided along the first incident portion 56 (outer peripheral portion) of the first light guide plate 16 and has an inner support portion 210 that abuts on the first incident portion 56 and supports the first light guide plate 16.

According to this, since the inner support portion 210 that supports the first light guide plate 16 is provided along the first incident portion 56 of the first light guide plate 16, the inner support portion 210 is attached to the first light guide plate 16. It can be brought into surface contact with each other. That is, the first light guide plate 16 can be supported with a large contact area as compared with the case where the first light guide plate 16 is directly fixed to the instrument main body 6 with screws. Therefore, it is possible to stably hold the first light guide plate 16.

Further, since the inner support portion 210 supports the first light guide plate 16 by simply abutting the first light guide plate 16, even if the first light guide plate 16 is thermally deformed, the first light guide plate 16 is the surface of the inner support portion 210. It will slip in the direction. That is, since the stress is not concentrated on the contact portion, the influence of thermal deformation can be suppressed, and the first light guide plate 16 can be held more stably.

Further, the first light guide plate 16 has a first side surface 62 that emits light, and the second light guide plate 18 has a second side surface 76 that emits light, and the first light guide plate 16 and the second light guide plate. When the 18 is viewed in a plan view, the first side surface 62 of the first light guide plate 16 is arranged in the region 63 including the central portion in the radial direction of the second light guide plate 18.

According to this, in the lighting method of the lighting fixture 2, the light from the first light emitting element 48 is guided into the room by the first light emitting element 48, and the light from the second light emitting element 50 is guided into the room by the second light emitting element 18. It is a light guide system that leads to. In this light guide method, when the distance from the first light emitting element 48 to the first end surface 60 of the first light guide plate 16 and the distance from the second light emitting element 50 to the second end surface 74 of the second light guide plate 18 are short. Even so, uneven brightness can be reduced. As a result, it is possible to reduce the thickness of the lighting fixture 2 while reducing the uneven brightness. Further, since the second light guide plate 18 is arranged so as to surround the first light guide plate 16, it is possible to secure a large light emitting area of the lighting fixture 2.

Further, the first side surface 62 and the second side surface 76 are arranged on substantially the same surface.

According to this, the lighting fixture 2 can be made even thinner.

Further, the fixing member 20 is arranged at a position not protruding from the first side surface 61 and the second side surface 76.

As a result, the fixing member 20 does not protrude from the first side surface 61 and the second side surface 76, so that the lighting fixture 2 can be made thinner.

Further, the first light guide plate 16 is formed in a cylindrical shape whose diameter is reduced from one end portion 56a toward the other end portion 56b, and the first one end surface 60 on which light is incident is formed on the one end portion 60a. It has a first emitting portion 58 formed so as to extend radially inward from the other end portion 56b of the first incident portion 56 and close the other end portion 56b, and a first side surface 62 is formed.

According to this, the positional relationship between the first end surface 60 and the first side surface 62 can be made substantially parallel, for example. As a result, since the first light emitting element 48 and the first light guide plate 16 can be arranged in the thickness direction of the luminaire 2, the luminaire 2 can be made thinner while suppressing the radial size of the luminaire 2. Can be planned.

Further, the shape of the first emission portion 58 is such that the light extraction efficiency of the light extracted from the inner peripheral portion of the first side surface 62 is higher than the light extraction efficiency of the light extracted from the outer peripheral portion of the first side surface 62. It is formed like this.

According to this, the light extraction efficiency at the inner peripheral portion of the first side surface 62 is higher than the light extraction efficiency at the outer peripheral portion of the first side surface 62. Therefore, for example, when the diameter of the first emission portion 58 is increased. Even if there is, it is possible to reduce the darkening of the inner peripheral portion of the first side surface 62. This makes it possible to reduce the uneven brightness on the first side surface 62. Further, the lighting system of the lighting fixture 2 is a light guide system that guides the light from the first light emitting element 48 into the room by the first light guide plate 16. In this light guide method, even when the distance from the first light emitting element 48 to the first end surface 60 of the first light guide plate 16 is short, it is possible to reduce the uneven brightness. As a result, it is possible to reduce the thickness of the lighting fixture 2 while reducing the uneven brightness.

Further, a light scattering pattern 68 having a plurality of low-angle prisms 66 (light scattering elements) is formed in the first emission unit 58. The light scattering pattern 68 is formed so that the light extraction efficiency at the inner peripheral portion of the first side surface 62 is higher than the light extraction efficiency at the outer peripheral portion of the first side surface 62.

According to this, by forming the light scattering pattern 68 on the first emission portion 58, it is possible to effectively reduce the luminance unevenness on the first side surface 62.

Further, the light scattering pattern 68 is formed so that the density of the plurality of low-angle prisms 66 increases as the light scattering pattern 68 approaches the inner peripheral portion from the outer peripheral portion of the first side surface 62.

According to this, by changing the densities of the plurality of low-angle prisms 66 according to the positions on the first side surface 62, it is possible to effectively reduce the unevenness of brightness on the first side surface 62.

Further, the light scattering pattern 68 is formed so that the size of each of the plurality of low-angle prisms 66 increases as the light scattering pattern 68 approaches the inner peripheral portion from the outer peripheral portion of the first side surface 62.

According to this, the luminance unevenness on the first side surface 62 can be effectively reduced by changing the size of each of the plurality of low-angle prisms 66 according to the position on the first side surface 62.

Further, a first light emitting portion that emits light incident on the first end surface 60 of the first light guide plate 16 is provided, and the first end surface 60 is formed over the entire circumference of one end portion 56a of the first incident portion 56. One light emitting unit has a plurality of first light emitting elements 48 arranged at intervals along the circumferential direction of the first end surface 60.

According to this, since the light from the plurality of first light emitting elements 48 is incident over the entire circumference of the first end surface 60, it is possible to reduce the luminance unevenness in the circumferential direction of the first side surface 62 of the first light guide plate 16. Can be done.

Further, the second light guide plate 18 is formed in a cylindrical shape whose diameter increases from one end 70a to the other 70b, and the second incident surface 74 on which light is incident is formed on the one end 70a. It has a second emitting portion 72 extending radially outward from the other end portion 70b of the second incident portion 70 and formed in an annular shape to form a second side surface 76.

According to this, the positional relationship between the second end surface 74 and the second side surface 76 can be made substantially parallel, for example. As a result, the second light emitting element 50 and the second light guide plate 18 can be arranged in the thickness direction of the luminaire 2, so that the luminaire 2 can be made thinner while suppressing the radial size of the luminaire 2. Can be planned.

Further, a second light emitting portion that emits light incident on the second end surface 74 of the second light guide plate 18 is provided, and the second end surface 74 is formed over the entire circumference of one end portion 70a of the second incident portion 72. The second light emitting unit has a plurality of second light emitting elements 50 arranged at intervals along the circumferential direction of the second end surface 74.

According to this, since the light from the plurality of second light emitting elements 50 is incident over the entire circumference of the second end surface 74, it is possible to reduce the luminance unevenness on the second side surface 76 of the second light guide plate 18.

(Embodiment 2)
[2-1. Configuration of the first light guide plate]
Next, the configuration of the first light guide plate 16A according to the second embodiment will be described with reference to FIG. FIG. 15 is a cross-sectional view showing the first light guide plate 16A according to the second embodiment. In the present embodiment, the same components as those of the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

As shown in FIG. 15, in the first light guide plate 16A according to the second embodiment, the light scattering pattern described in the first embodiment is not formed on the back surface 64 of the first emitting portion 58A. The first emitting portion 58A is formed so that the thickness (the size in the Z-axis direction) gradually decreases as the first side surface 62 approaches the inner peripheral portion from the outer peripheral portion. The thickness of the first emitting portion 58A is the largest at the center of the diameter of the first side surface 62 and the smallest at the outer peripheral edge of the first side surface 62.

With such a configuration, as in the first embodiment, the light extraction efficiency of the light extracted from the inner peripheral portion of the first side surface 62 is higher than the light extraction efficiency of the light extracted from the outer peripheral portion of the first side surface 62. Is bigger.

[2-2. effect]
In the luminaire of the present embodiment, the first emission portion 58A is formed so that the thickness decreases as the outer peripheral portion of the first side surface 62 approaches the inner peripheral portion.

According to this, the luminance unevenness on the first side surface 62 can be effectively reduced by changing the thickness of the first emission portion 58A according to the position on the first side surface 62.

(Embodiment 3)
[3-1. Translucent fixing member]
Next, the configuration of the fixing member 20c according to the third embodiment will be described with reference to FIG. FIG. 16 is a cross-sectional view showing the structure of the fixing member according to the third embodiment and its surroundings. Specifically, FIG. 16 is a diagram corresponding to FIG. 7. In the present embodiment, the same components as those of the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

In the first embodiment, the fixing member 20 having no translucency is exemplified. In the third embodiment, the fixing member 20c having translucency is exemplified. The fixing member 20c is entirely formed of a translucent resin. Therefore, the fixing member 20c can transmit light. That is, even if the fixing member 20c is provided with a light emitting portion for the fixing member, the light from the light emitting portion for the fixing member is transmitted through the fixing member 20c.

Specifically, a plurality of third light emitting elements 99, which are an example of the light emitting unit for the fixing member, are mounted on the plurality of substrates 46c of the light emitting module 12c. The plurality of third light emitting elements 99 are arranged between the first light emitting element 48 and the second light emitting element 50 in the radial direction of the luminaire 2. As a result, the plurality of third light emitting elements 99 are arranged so as to face the intermediate portion 230 of the fixing member 20c. Further, in this case, the cover member 22c is formed of a translucent resin. The light emitted from the plurality of third light emitting elements 99 passes through the fixing member 20c and the cover member 22c and is irradiated to the floor surface side.

[3-2. Effect etc.]
According to this, since the fixing member 20c has translucency, the light emitting region of the lighting fixture 2 itself can be widened, and the lighting performance can be further improved. Further, the dark part generated in the lighting fixture 2 itself can be reduced, and the aesthetic appearance at the time of lighting can be enhanced.

In the third embodiment, the case where the light emitting unit for the fixed member is provided is illustrated, but the light emitting unit for the fixed member may not be provided. For example, if light from at least one of the first light emitting element 48, the second light emitting element 50, the first light guide plate 16 and the second light guide plate 18 passes through the fixing member 20c, a certain effect of improving the lighting performance can be obtained. be able to.

Further, the fixing member 20c may be partially formed of the translucent resin even if the fixing member 20c is not entirely formed of the translucent resin. Further, forming an opening in the fixing member and allowing light to pass through the opening is also included in the translucency of the fixing member. In this case, the fixing member may be formed of a translucent resin or a non-translucent resin. Further, at least one of the fixing member 20c and the cover member 22c may have light diffusivity.

(Modification example, etc.)
Although the present invention has been described above based on the first and second embodiments, the present invention is not limited to the above embodiments.

Further, in each of the above embodiments, the first light guide plate 16 (16A) is formed in a circular shape in an XY plan view, but the present invention is not limited to this, and for example, the first light guide plate 16 (16A) may be formed in a rectangular shape in an XY plan view. Further, the second light guide plate 18 is formed in an annular shape in an XY plan view, but the present invention is not limited to this, and for example, the second light guide plate 18 may be formed in a rectangular annular shape in an XY plan view.

Further, in each of the above embodiments, the case where the luminaire 2 is provided with the first light guide plate 16 is illustrated, but the luminaire may not be provided with the first light guide plate.

Further, in each of the above embodiments, the case where the fixing member 20 is continuously provided over the entire circumference of the second light guide plate 18 is illustrated. However, the fixing member may be provided intermittently with respect to the entire circumference of the second light guide plate 18.

Further, in each of the above embodiments, the mounting structures of the first light emitting element 48 and the second light emitting element 50 are SMD structures, but the structure is not limited to this, and for example, a COB (Chip) in which an LED chip is directly mounted on a substrate 46 is used. It may have an OnBorder) structure. In this case, a plurality of LED chips mounted on the substrate 46 may be collectively sealed by the sealing member, or may be individually sealed. Further, the sealing member may contain a wavelength conversion material such as the above-mentioned yellow phosphor.

Further, in each of the above embodiments, LEDs are exemplified as the first light emitting element 48 and the second light emitting element 50, but the present invention is not limited to this, and for example, a semiconductor light emitting element such as a semiconductor laser, an organic EL (Electroluminescence) or an inorganic substance is used. Other solid light emitting elements such as EL may be used.

Further, the luminaire 2 may include, for example, an ion generating unit for generating negative ions. The ion generating portion is arranged inside, for example, the instrument main body 6. The ion generation unit includes a needle-shaped discharge electrode, a high voltage generation circuit that applies a high voltage (for example, about 6000 V) to the needle-shaped discharge electrode, and a Pelche element that cools the needle-shaped discharge electrode. The needle-shaped release electrode is cooled by the Pelche effect of the Pelche element to cause dew condensation. Negative ions (so-called nanoe (so-called nanoe) (so-called nanoe) wrapped in nanometer-sized (for example, about 5 to 20 nm in diameter) fine particle water by applying a high voltage to the moisture in the air condensed by the high voltage generation circuit on the needle-shaped discharge electrode. Registered trademark)) is generated. Negative ions generated by the ion generating portion are blown out to the outside of the instrument main body 6 by a blower fan or the like arranged inside the instrument main body 6 and diffused into the room.

In addition, Nanoe can exist in the air for a longer time (with a life of about 6 times that of negative ions) than when negative ions alone exist, and because it is very small in nanometer size, the entire room It can diffuse evenly and float for a long time. Nanoe is known to be highly reactive and have the ability to act on odorous components and decompose them into odorless components. Therefore, by diffusing Nanoe indoors, a) the effect of deodorizing indoor curtains or floating dust, b) the effect of inactivating allergens, viruses, etc. floating or adhering to the room, c) floating indoors. Alternatively, the effect of eradicating attached molds, bacteria, etc. can be obtained.

Further, the lighting fixture 2 may include a motion sensor for detecting the presence of a person in the room and an image sensor having a camera function for capturing an image of the surroundings of the lighting fixture 2. The image sensor is, for example, a CMOS (Complementary Metal Oxide Sensor) image sensor. In this case, when a person is detected in the room by the motion sensor, the image captured by the image sensor can be stored in a memory or the like as a crime prevention measure.

Further, the luminaire 2 may include a speaker that outputs the sound received by the luminaire 2 by wire or wirelessly. In this case, for example, the speaker may be controlled so that the sound is output from the speaker in synchronization with the lighting of the light emitting module 12.

In addition, it is realized by arbitrarily combining the components and functions in each embodiment to the extent obtained by applying various modifications to each of the above embodiments to be conceived by those skilled in the art, and to the extent that the gist of the present invention is not deviated. Also included in the present invention.

2 Lighting fixture 6 Fixture body 16, 16A First light guide plate (inner light guide plate)
18 Second light guide plate (annular light guide plate)
20, 20c Fixing member 22, 22c Cover member 48 First light emitting element (first light emitting part)
50 Second light emitting element (second light emitting part)
56 First incident part (outer peripheral part)
56a, 70a One end 56b, 70b The other end 58, 58A First exit 60 First end surface 62 First side surface 66, 80 Low angle prism (light scattering element)
68, 82 Light scattering pattern 70 Second incident part (inner peripheral part)
72 Second exit 74 Second end surface 76 Second side surface 210 Inner support 220 Outer support 235 Ribs

Claims (18)

The instrument body and
An annular light guide plate and
A fixing member for fixing the annular light guide plate to the instrument main body while being fixed to the instrument main body inside the annular light guide plate .
An inner light guide plate, which is inside the annular light guide plate and is arranged at a position sandwiching the fixing member together with the annular light guide plate, is provided.
The fixing member is
An outer support portion provided along the inner peripheral portion of the annular light guide plate and abutting on the inner peripheral portion to support the annular light guide plate, and an outer support portion .
An inner support portion provided along the outer peripheral portion of the inner light guide plate and abutting on the outer peripheral portion to support the inner light guide plate, and an inner support portion.
A lighting fixture that is arranged between the outer support portion and the inner support portion and has a fixing portion for fixing the fixing member to the fixture main body . The lighting fixture according to claim 1, wherein the fixing member is continuously provided over the entire circumference of the annular light guide plate. The luminaire according to claim 1 or 2, wherein the fixing member has a plurality of ribs extending along the radial direction of the annular light guide plate. The lighting fixture according to any one of claims 1 to 3, wherein the fixing member has translucency. The luminaire according to claim 4, further comprising a light emitting unit for a fixing member that emits light to the fixing member. The lighting fixture according to any one of claims 1 to 3, further comprising a light-shielding cover member that covers the fixing member from the side opposite to the annular light guide plate. The inward light guide plate has a first side surface that emits light.
The annular light guide plate has a second side surface that emits light.
When the inward light guide plate and the annular light guide plate are viewed in a plan view, the first side surface of the inner light guide plate is arranged in a region including a central portion in the radial direction of the annular light guide plate. The lighting equipment according to any one of 6 to 6 . The lighting fixture according to claim 7 , wherein the first side surface and the second side surface are arranged on substantially the same surface. The luminaire according to claim 8 , wherein the fixing member is arranged at a position not protruding from the first side surface and the second side surface. The inward light guide plate is
A first incident portion formed in a cylindrical shape whose diameter is reduced from one end to the other end, and a first end surface on which light is incident is formed on the one end.
Claims 7 to 9 include a first emitting portion formed so as to extend radially inward from the other end portion of the first incident portion and close the other end portion, and the first side surface thereof is formed. The lighting equipment according to any one of the above. The shape of the first emission portion is such that the light extraction efficiency of the light extracted from the inner peripheral portion of the first side surface is higher than the light extraction efficiency of the light extracted from the outer peripheral portion of the first side surface. The luminaire according to claim 10, which is formed. A light scattering pattern having a plurality of light scattering elements is formed in the first emission portion.
According to claim 10, the light scattering pattern is formed so that the light extraction efficiency at the inner peripheral portion of the first side surface is higher than the light extraction efficiency at the outer peripheral portion of the first side surface. The listed lighting fixtures. The luminaire according to claim 12 , wherein the light scattering pattern is formed so that the density of the plurality of light scattering elements increases as the light scattering pattern approaches the inner peripheral portion from the outer peripheral portion of the first side surface. The light scattering pattern is formed so that the size of each of the plurality of light scattering elements increases as the light scattering pattern approaches the inner peripheral portion from the outer peripheral portion of the first side surface. Claims 1 2 or 13. Lighting equipment described in. The illumination according to any one of claims 1 to 14 , wherein the first emitting portion is formed so that the thickness decreases as the outer peripheral portion of the first side surface approaches the inner peripheral portion. Equipment. A first light emitting unit that emits light incident on the first end surface of the inward light guide plate is provided.
The first end surface is formed over the entire circumference of the one end portion of the first incident portion.
The luminaire according to any one of claims 10 to 15 , wherein the first light emitting unit has a plurality of first light emitting elements arranged at intervals along the circumferential direction of the first end surface. The annular light guide plate is
A second incident portion formed in a cylindrical shape whose diameter increases from one end to the other end, and a second end surface on which light is incident is formed on the one end.
The item according to any one of claims 7 to 16 , further comprising a second emitting portion extending radially outward from the other end of the second incident portion and formed in an annular shape and having the second side surface formed thereof. The listed lighting fixtures. A second light emitting unit that emits light incident on the second end surface of the annular light guide plate is provided.
The second end surface is formed over the entire circumference of the one end portion of the second incident portion.
The luminaire according to claim 17 , wherein the second light emitting unit has a plurality of second light emitting elements arranged at intervals along the circumferential direction of the second end surface.

Images