JP2015069901A - Lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting fixture capable of radiating illumination light having a stereoscopic feeling.SOLUTION: A first light guide plate 41 is disposed parallel and separately with respect to a building material 11. A second light guide plate 42 is disposed parallel and separately with respect to the first light guide plate 41 on the opposite side from the building material 11. A first light emitting part 31 radiates light toward an incident end surface 413 of the first light guide plate 41, and a second light emitting part 32 radiates light toward an incident end surface 423 of the second light guide plate 42. Then, in the first light guide plate 41 and the second light guide plate 42, light entered from the incident end surfaces 413, 423 emits from an upper surface and a lower surface, and also the first and second light guide plates have light transmitting properties along a thickness direction. Therefore, the light entered the first light guide plate 41 emits light on the building material 11 side and the second light guide plate 42 side, and the light emitted to the second light guide plate 42 side passes through the second light guide plate 42 and is radiated downward. Also, the light entered the second light guide plate 42 emits light on the first light guide plate 41 side and downward, and the light emitted upward passes through the first light guide plate 41 and is radiated to the building material 11.

Description

  The present invention relates to a lighting fixture that illuminates by irradiating light emitted from a light source through a light guide plate.

2. Description of the Related Art Conventionally, a lighting fixture that controls the direction of light emitted from a light source using a light control member is known (see, for example, Patent Document 1).
As shown in FIG. 8, in the lighting fixture 100 described in Patent Document 1, a light source holding portion 102 is attached to the lower surface of a chassis 101 that is a fixture body, and an LED that is a light source is provided on the side surface of the light source holding portion 102. A module 103 is attached.
The LED module 103 includes an LED substrate 104, a plurality of daylight color LEDs 105 that are mounted on the LED substrate 104 and emit daylight color light, and a plurality of light bulb color LEDs 106 that emit light bulb color light.

The chassis 101 is provided with a light guide plate 107 as a light control member for controlling the direction of light emitted from the LED module 103, and a diffusion plate 108 is provided on the upper and lower surfaces of the light guide plate 107. The light guide plate 107 has a disk shape having a regular octagonal hole that matches the arrangement shape of the LED module 103 at the center.
Therefore, the light emitted from the LED module 103 is incident on the light guide plate 107, and a part of the incident light is repeated toward the outer edge of the light guide plate while repeating total reflection between the upper and lower surfaces of the light guide plate 107. spread. At this time, the light enters the diffusion plate 108 from the light guide plate 107, is diffused by the diffusion plate 108, and is emitted downward and upward.

Japanese Patent Laying-Open No. 2011-222420 (FIG. 10)

  However, the conventional lighting fixture described in Patent Document 1 as described above is a thin lighting fixture and guides light from a light source using a single light guide plate. There is a problem that the illumination light itself and the illumination light emitted therefrom are lacking in stereoscopic effect and are not satisfactory.

  Further, in the conventional lighting apparatus described in Patent Document 1, when the number of LED modules 103 is increased in order to increase the amount of light emitted from the light guide plate 107, the number of the light guide plates 107 is one, so that high output and high luminance are achieved. The light is too bright and the heat generated from the light guide plate 107 is excessive.

Furthermore, in order to increase the amount of light emitted from the light guide plate 107, it is necessary to increase the number of LED modules 103 arranged in the center of the light guide plate 107.
However, in order to increase the number of LED modules 103, it is necessary to make the polygons without changing the end face dimensions of the square holes provided in the center of the light guide plate 107. In this case, the light guide plate 107 itself is large. There is also a problem of becoming.

  The present invention has been made to solve the conventional problems, and an object of the present invention is to provide a lighting fixture that can obtain a three-dimensional illumination light, suppress the generation of heat, and can reduce the size of the light guide plate. To do.

  The lighting fixture of the present invention includes a fixture main body, a power supply unit accommodated in the fixture main body, a first light guide plate supported by the fixture main body extending outward from the fixture main body, the fixture main body, A second light guide plate that extends outward from the fixture body and is supported parallel to and spaced from the first light guide plate, and light toward the entrance end surface of the first light guide plate on the fixture main body side. A first light-emitting portion capable of irradiating light, a second light-emitting portion capable of irradiating light toward the incident end surface on the instrument body side of the second light guide plate, the first light guide plate and the second light guide plate, Light incident from the incident end face can be emitted in a direction intersecting the incident direction, and the first light guide plate has translucency along the thickness direction.

  Moreover, as for the lighting fixture of this invention, the said 2nd light-guide plate has translucency along a thickness direction.

  In the lighting fixture of the present invention, the first light guide plate and the second light guide plate have a hollow portion surrounded by the incident end face.

  In the lighting fixture of the present invention, the first light guide plate and the second light guide plate have an arcuate outer end surface.

  In the lighting fixture of the present invention, the first light guide plate and the second light guide plate are similar in planar shape to each other, and the planar contour shape of the first light guide plate is the planar contour shape of the second light guide plate. The planar contour of the second light guide plate is arranged within the planar contour of the first light guide plate in plan view.

  Furthermore, in the lighting fixture of the present invention, the first light guide plate and the second light guide plate have a disk shape and are arranged coaxially with the fixture body as the center.

  In the lighting fixture of the present invention, the first light emitting unit and the second light emitting unit emit light having different color temperatures.

  Furthermore, the lighting fixture of this invention is provided in the said fixture main body, and has an auxiliary light part which radiate | emits light on the opposite side to a construction material.

Since this invention has a 1st light guide plate and a 2nd light guide plate, a three-dimensional effect is acquired compared with the case where one sheet of light guide plate is used.
In addition, since the present invention has the first light guide plate and the second light guide plate, the high output and high luminance light is excessively dazzled or generated from the light guide plate as compared with the case where one light guide plate is used. There is no inconvenience that there is too much heat, and the problem that the light guide plate itself increases in size to increase the amount of light emitted from the light guide plate can also be avoided.

The side view of the lighting fixture of embodiment which concerns on this invention The perspective view which looked at the lighting fixture of embodiment which concerns on this invention from the downward direction Sectional view at position III-III in FIG. Sectional view of position IV-IV in FIG. Sectional drawing which shows the course of the light of the 1st light emission part which injected into the 1st light guide plate, and the light of the 2nd light emission part which injected into the 2nd light guide plate (A) is the perspective view which shows the case where a lighting fixture is attached to a wall surface, (B) is the top view which looked at the lighting fixture from the upper part, (C) is the case where a lighting fixture is attached to a corner. (D) is a plan view of the luminaire as viewed from above, (E) is a perspective view showing a case where the luminaire is attached to the corner, and (F) is an upper view of the luminaire. Plan view seen from Main part schematic showing a modification of the present invention Partial expanded sectional view of the main part in the conventional lighting fixture

Hereinafter, the lighting fixture of embodiment which concerns on this invention is demonstrated using drawing.
As shown in FIGS. 1 and 2, the lighting apparatus 10 of the embodiment is attached to the lower surface (ceiling surface 12) of a ceiling material 11 that is a construction material, and illuminates the lower room 13, the ceiling surface 12, and the like. Can be used.
In the following description, the ceiling surface 12 side as viewed from the room 13 is referred to as “upper”, and the side opposite to the ceiling surface 12 is referred to as “lower”.

As shown in FIGS. 1 and 3, the lighting fixture 10 has a fixture body 20 attached to the ceiling surface 12. The instrument body 20 has a thin cylindrical shape having a top plate 21 at the upper end of the peripheral wall 22 and a bottom plate 24 at the lower end of the peripheral wall 22, and accommodates a power supply unit 26 therein.
The top plate 21 is provided with a joint portion 27 that is electrically and mechanically joined to the hook ceiling 17 attached to the ceiling surface 12. An elastic member 23 such as rubber or sponge is attached to the top surface of the top plate 21.

Therefore, by joining the joint portion 27 of the instrument body 20 to the hooking ceiling 17 of the ceiling surface 12, the instrument body 20 is attached to the ceiling surface 12, and at the same time, the power supply unit 26 is wired to the back side (upper side) of the ceiling material 11. It is electrically connected to a power line (not shown).
At this time, since the elastic member 23 is compressed between the top plate 21 and the ceiling surface 12, the instrument body 20 is attached to the ceiling surface 12 without wobbling due to the repulsive force.

As shown in FIGS. 3 and 4, a central cylindrical portion 25 is provided at the central portion of the bottom plate 24 of the instrument body 20. Here, the central cylindrical portion 25 has a hexagonal cross section in plan view. A power supply unit 26 is accommodated inside the central tube unit 25.
A first light emitting unit 31 is attached to the outer surface of the central tube portion 25 on the side closest to the instrument main body 20 (that is, the uppermost portion), and the second light emission is performed at a predetermined interval below the first light emitting unit 31. A part 32 is provided.

The first light emitting unit 31 includes an elongated rectangular flat-plate LED substrate 311, and a plurality of LEDs 312 are mounted on the LED substrate 311. The flat LED substrate 311 is attached to the six planar outer surfaces of the central tube portion 25 (see FIG. 4).
Therefore, the LED substrate 311 is attached at a right angle to the bottom plate 24 of the appliance main body 20, and the LED 312 emits light parallel to the ceiling surface 12 in a direction away from the central tube portion 25 (see FIG. 5).

Similarly, the 2nd light emission part 32 has the LED board 321 of an elongate rectangular flat plate shape, and several LED322 is mounted in the LED board 321. FIG. The flat LED substrate 321 is attached to the six planar outer surfaces of the central tube portion 25 (see parentheses in FIG. 4). Therefore, the LED substrate 321 is attached at a right angle to the bottom plate 24 of the instrument body 20, and the LED 322 emits light in parallel with the ceiling surface 12 in a direction away from the central tube portion 25.
The first light emitting unit 31 and the second light emitting unit 32 desirably emit light having different color temperatures. That is, the LED 312 of the first light emitting unit 31 and the LED 322 of the second light emitting unit 32 emit light having different color temperatures. For example, the LED 312 of the first light emitting unit 31 can be a daylight color, and the LED 322 of the second light emitting unit 32 can be a light bulb color.

The first light emitting unit 31 and the second light emitting unit 32 are turned on under the control of the power supply unit 26. The 1st light emission part 31 and the 2nd light emission part 32 can be controlled separately. For example, both the first light emitting unit 31 and the second light emitting unit 32 can be turned on synchronously, or one can be turned on and the other can be turned off.
In addition, the outputs of the first light emitting unit 31 and the second light emitting unit 32 having different color temperatures can be controlled separately.

As shown in FIG. 1 and FIG. 3, a first light guide plate 41 that is extended and supported outward from the instrument body 20 is parallel to the ceiling surface 12 and spaced apart from the lower surface of the bottom plate 24 of the instrument body 20. Has been attached. The first light guide plate 41 is sandwiched and supported between the bottom plate 24 of the instrument body 20 and the first light guide plate support member 43.
As shown in FIG. 4, the 1st light-guide plate 41 is a hollow disk shape, and the hollow part 411 which the center cylinder part 25 penetrates in the center is provided. The outer end surface 412 of the first light guide plate 41 is preferably arcuate. The hollow portion 411 has a hexagonal shape in a plan view surrounded by the incident end surface 413, and the incident end surface 413 on the hollow portion 411 side is disposed so as to face the LED 312 of the first light emitting unit 31 (see FIG. 5). .
As shown in FIGS. 1 and 3, the first light guide plate 41 is larger than the instrument main body 20 in a plan view and protrudes outside the instrument main body 20.

In addition, on the opposite side (that is, the lower side) of the first light guide plate 41 in the instrument body 20 from the ceiling surface 12, a second light guide plate 42 that is extended and supported outward from the instrument body 20 is provided as a first guide. The optical plate 41 is mounted in parallel and spaced apart. The second light guide plate 42 is sandwiched and supported between the first light guide plate support member 43 and the second light guide plate support member 44.
As shown in parentheses in FIG. 4, the second light guide plate 42 has a hollow disk shape, and a hollow portion 421 through which the central cylindrical portion 25 passes is provided at the center. The outer end surface 422 of the second light guide plate 42 is preferably arcuate. The hollow portion 421 has a hexagonal shape in plan view surrounded by the incident end surface 423, and the incident end surface 423 on the hollow portion 421 side is disposed so as to face the LED 322 of the second light emitting unit 32 (see FIG. 5). .

As shown in FIG. 2, the first light guide plate 41 and the second light guide plate 42 have similar planar shapes. Here, the first light guide plate 41 and the second light guide plate 42 have a hollow disk shape and are arranged coaxially with the instrument body 20 as the center.
The planar contour shape of the first light guide plate 41 is larger than the planar contour shape of the second light guide plate 42, and the planar contour of the second light guide plate 42 is within the planar contour of the first light guide plate 41 in plan view. Has been placed. Therefore, the second light guide plate 42 is included in the first light guide plate 41 in plan view.

As shown in FIG. 5, in the first light guide plate 41 and the second light guide plate 42, the light beams LA1 and LB1 incident from the incident end surfaces 413 and 423 are guided toward the outside, and the upper surface on the ceiling surface 12 side in the middle. And exit from the lower surface. That is, light is emitted in a direction intersecting the incident direction in the light guide path extending from the incident end surfaces 413 and 423 to the outer end surfaces 412 and 422.
In addition, since the first light guide plate 41 and the second light guide plate 42 have translucency along the thickness direction, the light LA2 emitted downward from the first light guide plate 41 passes through the second light guide plate 42 and moves downward. Is irradiated.
Further, the light LB2 emitted from the second light guide plate 42 toward the ceiling surface 12 passes through the first light guide plate 41 and is irradiated onto the ceiling surface 12. The light irradiated on the ceiling surface 12 is reflected by the ceiling surface 12 and irradiated downward (see LA3 and LB3).
Furthermore, when the first light emitting unit 31 and the second light emitting unit 32 do not emit light, the ceiling surface 12 can be seen through the first light guide plate 41 and the second light guide plate 42.

As shown in FIG. 3, an auxiliary light portion 33 is attached to the tip of the central tube portion 25. The auxiliary light unit 33 emits light toward the side opposite to the ceiling surface 12, that is, downward. The auxiliary light portion 33 can be formed by mounting a plurality of LEDs 332 on the lower surface of a ring-shaped or disk-shaped LED substrate 331, for example.
A translucent central cover 34 is attached to the lower side of the auxiliary light portion 33.
Therefore, the light emitted from the LED 332 of the auxiliary light unit 33 passes through the center cover 34 and is mainly irradiated downward.

Next, the light irradiated from the lighting fixture 10 is demonstrated.
As shown in FIG. 5, the light LA emitted from the LED 312 of the first light emitting unit 31 enters the inside of the first light guide plate 41 from the incident end surface 413 of the first light guide plate 41 facing the LED 312. Then, the inside of the first light guide plate 41 is guided to the outside (LA1). On the way, the light is emitted to the ceiling surface 12 side and downward.
Therefore, the room 13 is illuminated with the indirect light irradiated upward from the first light guide plate 41 and reflected by the ceiling surface 12 and the light irradiated downward from the first light guide plate 41 and transmitted through the second light guide plate 42.

The light LB emitted from the LED 322 of the second light emitting unit 32 enters the second light guide plate 42 from the incident end surface 423 of the second light guide plate 42 facing the LED 322. Then, the inside of the second light guide plate 42 is guided outward (LB1). On the way, the light is emitted to the ceiling surface 12 side and downward.
Accordingly, the room 13 is illuminated with indirect light that is irradiated upward from the second light guide plate 42, transmitted through the first light guide plate 41 and reflected by the ceiling surface 12, and light irradiated downward from the second light guide plate 42.

At this time, since the first light guide plate 41 and the second light guide plate 42 have translucency along the thickness direction, the light (LA2) emitted downward from the first light guide plate 41 passes through the second light guide plate 42. It passes through and is irradiated downward.
Similarly, the light (LB2) emitted from the second light guide plate 42 to the ceiling surface 12 side passes through the first light guide plate 41 and is irradiated onto the ceiling surface 12.
In addition, light emitted from the LED 332 of the auxiliary light unit 33 provided at the center of the lower surface of the lighting fixture 10 is mainly irradiated downward through the center cover 34.

Next, the effect of a lighting fixture is demonstrated.
In the lighting device 10, the power source unit 26 is accommodated in the fixture body 20 supported by the ceiling material 11, and the first light guide plate 41, the second light guide plate 42, the first light emitting unit 31, and the second light emitting unit 32 are supported. Has been.

The first light guide plate 41 is supported by the instrument body 20 and is arranged parallel to and spaced from the ceiling surface 12. The second light guide plate 42 is supported by the instrument body 20 and is arranged parallel to and spaced from the first light guide plate 41 on the side opposite to the ceiling surface 12.
Moreover, the 1st light emission part 31 can irradiate light toward the incident end surface 413 by the side of the instrument main body 20 in the 1st light guide plate 41, and the 2nd light emission part 32 is the instrument main body 20 side in the 2nd light guide plate 42. The light can be irradiated toward the incident end face 423.

In the first light guide plate 41 and the second light guide plate 42, light incident from the incident end surfaces 413 and 423 is guided to the outside, and in the middle, from the upper surface on the ceiling surface 12 side and the lower surface opposite to the upper surface. Exit. Moreover, the 1st light guide plate 41 and the 2nd light guide plate 42 have translucency along the thickness direction.
Therefore, the light incident on the first light guide plate 41 from the first light emitting unit 31 is emitted to the ceiling surface 12 side and the second light guide plate 42 side, and the light emitted to the second light guide plate 42 side is the second guide. The light passes through the light plate 42 and is irradiated on the floor surface opposite to the ceiling surface 12.
In addition, the light incident on the second light guide plate 42 from the second light emitting unit 32 is emitted to the first light guide plate 41 side and the opposite side of the first light guide plate 41, and is emitted to the first light guide plate 41 side. The light passes through the first light guide plate 41 and is irradiated on the ceiling surface 12.

Thereby, the light of both the 1st light emission part 31 and the 2nd light emission part 32 can be irradiated to the downward direction on the opposite side to the ceiling surface 12 and the ceiling surface 12. FIG. Moreover, since the light radiate | emitted from the 1st light-guide plate 41 passes through the 2nd light-guide plate 42, and is irradiated below, it can irradiate illumination light with a three-dimensional effect.
In addition, when the first light emitting unit 31 and the second light emitting unit 32 do not emit light, the ceiling surface 12 can be seen through the first light guide plate 41 and the second light guide plate 42, so The feeling can be eliminated.

  Moreover, according to the lighting fixture 10, since it has the 1st light-guide plate 41 and the 2nd light-guide plate 42 which are spaced apart, compared with the case where one light-guide plate is used, high output and high-intensity light are emitted. There is no inconvenience that too much glare or too much heat is generated from one light guide plate, and further, one light guide plate itself is increased in size to increase the amount of light emitted from one light guide plate. Problems can also be avoided.

  In the lighting fixture 10, since the first light guide plate 41 and the second light guide plate 42 are provided with hollow portions 411 and 421, respectively, the incident end surfaces 413 and 423 of the first light guide plate 41 and the second light guide plate 42 are provided. The 1st light emission part 31 and the 2nd light emission part 32 can be arrange | positioned facing.

  In the lighting fixture 10, the first light guide plate 41 and the second light guide plate 42 have arc-shaped outer end surfaces 412 and 422.

Moreover, in the lighting fixture 10, the 1st light-guide plate 41 and the 2nd light-guide plate 42 have a mutually similar planar shape. Further, the planar contour shape of the first light guide plate 41 is larger than the planar contour shape of the second light guide plate 42, and the planar contour of the second light guide plate 42 is disposed within the planar contour of the first light guide plate 41 in plan view. Has been. That is, the first light guide plate 41 on the ceiling surface 12 side is larger than the second light guide plate 42 on the side far from the ceiling surface 12.
Thereby, the ceiling surface 12 can be illuminated brightly by indirect illumination.

Moreover, in the lighting fixture 10, since the 1st light emission part 31 and the 2nd light emission part 32 light-emit the light of mutually different color temperature, it can make the 1st light-guide plate 41 and the 2nd light-guide plate 42 light-emit in a different color. And can emit light three-dimensionally.
In particular, as shown in FIG. 3, the lighting fixture 10 has an overlapping portion in which the light emitting area of the first light guide plate 41 and the light emitting area of the second light guide plate 42 overlap each other, so that the stereoscopic effect of light becomes remarkable.

  Furthermore, since the lighting fixture 10 is provided in the fixture main body 20, and has the auxiliary light part 33 which radiate | emits light on the opposite side to the ceiling surface 12, it can fully illuminate directly under the lighting fixture 10. FIG.

The lighting fixture of the present invention is not limited to the above-described embodiment, and appropriate modifications and improvements can be made.
For example, in the above-described embodiment, the case where the lighting fixture 10 is directly attached to the ceiling surface 12 is illustrated. In addition, it is also possible to suspend the lighting fixture 10 from the ceiling surface 12 with a suspension member such as a wire or a chain.

Moreover, although the case where the lighting fixture 10 was attached to the ceiling surface 12 was illustrated in embodiment mentioned above, attaching to the wall surface 14 is also possible.
In this case, as shown in FIGS. 6A and 6B, when the lighting fixture 10A is attached to the wall surface 14, the fixture main body 20, the first light guide plate 41, the second light guide plate 42, and the like are flat. It becomes a half circle shape in view.
As shown in FIGS. 6C and 6D, when the lighting fixture 10B is attached to the protruding corner 16 of the wall surface 14, the fixture body 20, the first light guide plate 41, and the second light guide plate 42 are provided. Etc. is 3/4 yen in plan view.
Furthermore, as shown in FIGS. 6E and 6F, when the lighting fixture 10C is attached to the corner 15 of the wall surface 14, the fixture body 20, the first light guide plate 41, and the second light guide plate 42 are provided. Etc. becomes 1/4 circle in plan view.
In addition, the luminaire may be arranged so that the first light guide plate and the second light guide plate are parallel to the wall surface, or the luminaire may be placed on the floor.

Moreover, you may provide the impervious layer 424 in the upper surface at the side of the 1st light-guide plate 41 in the 2nd light-guide plate 42 like lighting fixture 10D shown in FIG.
The reflectance of the upper surface and the lower surface of the opaque layer 424 is arbitrary.

According to such a lighting fixture 10D, the light from the second light guide plate 42 is emitted to the side opposite to the first light guide plate 41 without passing through the first light guide plate 41 side. It is possible to further increase the brightness of the irradiation space on the side opposite to (such as the indoor space on the side opposite to the ceiling surface 12).
Of the light emitted from the first light guide plate 41, the light emitted toward the second light guide plate 42 is reflected by hitting the opaque layer 424 of the second light guide plate 42, and the first light guide plate 41 is reflected. Since the light passes through the ceiling surface 12, the brightness on the opposite side of the first light guide plate 41 from the second light guide plate 42 can be further increased. In addition, when the first light guide plate 41 and the second light guide plate 42 are lit in different emission colors, the light of the first light guide plate 41 is blocked by the non-transmissive layer 424 of the second light guide plate 42, and thus the lighting fixture 10D. Of the first light guide plate 41, the tip portion not blocked by the opaque layer 424 of the second light guide plate 42 can be seen to emit light in a ring shape. The light emission decoration at the time of lighting can be enhanced, for example, the light emission color of the second light guide plate 42 and the light emission color of the tip portion of the first light guide plate 41 can be made different.

Further, in the above-described embodiment, the six first light emitting units 31 and the six second light emitting units 32 are provided on the outer surface of the central cylindrical portion 25 using the central cylindrical portion 25 having a hexagonal cross section. The case was illustrated.
The cross-sectional shape of the central cylinder part 25 is not limited to a hexagon, and an arbitrary polygon can be used. In this case, the 1st light emission part 31 and the 2nd light emission part 32 can be provided corresponding to each edge | side.

10 Lighting equipment 11 Ceiling material (construction material)
DESCRIPTION OF SYMBOLS 20 Apparatus main body 26 Power supply part 31 1st light emission part 32 2nd light emission part 33 Auxiliary light part 41 1st light guide plate 413 Incident end surface 412 Outer end surface 42 2nd light guide plate 423 Incident end surface 422 Outer end surface

Claims (9)

An instrument body;
A power supply unit housed in the instrument body;
A first light guide plate supported by the instrument body extending outward from the instrument body;
A second light guide plate that is supported on the instrument body by extending outward from the instrument body and parallel to the first light guide plate, and spaced apart from the first light guide plate;
A first light emitting unit capable of irradiating light toward an incident end surface on the instrument body side of the first light guide plate;
A second light emitting unit capable of irradiating light toward an incident end surface on the instrument body side of the second light guide plate;
The first light guide plate and the second light guide plate can emit light incident from the incident end face in a direction intersecting the incident direction,
The first light guide plate is a luminaire having translucency along the thickness direction. The lighting fixture according to claim 1,
The second light guide plate is a luminaire having translucency along the thickness direction. The lighting fixture according to claim 1 or 2,
The first light guide plate and the second light guide plate each have a hollow portion surrounded by the incident end face. In the lighting fixture of any one of Claim 1 to Claim 3,
The first light guide plate and the second light guide plate each have a circular arc outer end surface. In the lighting fixture of any one of Claim 1 to Claim 4,
The first light guide plate and the second light guide plate are similar in planar shape to each other, and the planar contour shape of the first light guide plate is larger than the planar contour shape of the second light guide plate, and in plan view A lighting fixture in which a planar contour of the second light guide plate is disposed within a planar contour of the first light guide plate. In the lighting fixture of any one of Claim 1 to Claim 5,
The said 1st light-guide plate and the said 2nd light-guide plate are disk-shaped, and are the lighting fixtures arrange | positioned coaxially centering | focusing on the said instrument main body. In the lighting fixture of any one of Claim 1 to Claim 6,
The lighting device in which the first light emitting unit and the second light emitting unit emit light having different color temperatures. In the lighting fixture of any one of Claim 1 to Claim 7,
The lighting fixture which has the auxiliary light part which is provided in the said fixture main body, and radiate | emits light on the opposite side to a construction material. The lighting fixture according to claim 1,
The said 2nd light-guide plate is a lighting fixture by which the impervious layer is provided in the surface at the side of the said 1st light-guide plate.

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