JP6563772B2 - lighting equipment - Google Patents

Description

  The present invention relates to a lighting apparatus and a light emission method. More specifically, the present invention relates to a lighting fixture with a pillar arranged in a park, a street, or the like, and relates to a lighting fixture capable of ensuring a wide irradiation range and a light emission method.

  Many lighting fixtures are installed on the side edges of roads, parks, etc. for traffic safety and crime prevention purposes. Incandescent light bulbs, halogen lamps, fluorescent lamps, and the like have been conventionally used as light sources for such lighting fixtures, but in recent years, light-emitting diode elements (hereinafter referred to as “LEDs”) have been used as light sources to replace these incandescent light bulbs. Lighting fixtures using abbreviated as) have been proposed.

However, the LED is a point light source and has high directivity, and depending on the irradiation direction, the light may enter the eyes and may cause discomfort such as glare.
Generally, the height of the lighting fixture is set to 3.0 to 6.0 m if the height from the ground to the light emitting part is high, and 0.5 to 1.0 m if the height is low. Although there are many things set to the extent, particularly in a low-lighting luminaire, the pedestrian's line of sight and the light emission part may coincide, and the glare may be felt.

  In response to such a problem, for example, as disclosed in Patent Document 1, light emitted from the light source is dispersed in multiple directions using a reflector, the irradiation range is widened, and the emitted light from the light source is excessive. Techniques for preventing concentration on the subject have been proposed.

  Specifically, as shown in FIG. 6, a lamp 105 as a light source capable of moving the column 102 in the vertical direction at the lower end of the column 102, and a first position at a position where the column 102 of the lamp 105 opposes in the vertical direction. Each of the reflectors 108 is provided. The light emitted from the lamp 105 is reflected by the second reflector 109 so as to be directed upward in the vertical direction and directed to the first reflector 108. The reflected light incident on the first reflecting plate 108 is diffusely reflected by the first reflecting plate 108 at a certain angle and obliquely downward in the vertical direction of the support column 102, and the diffusely reflected reflected light irradiates around the lighting fixture 101. To do.

  That is, the pedestrian is not irradiated with the direct light directly emitted from the lamp 105, but is once irradiated with the reflected light reflected by the first reflector 108. Since the reflected light is softer and more uniform than the direct light, the pedestrian does not feel dazzling with gentle eyes (see Patent Document 1).

Here, the first reflector 108 is installed with a predetermined angle with respect to the walking surface so as to determine a target irradiation range and illuminate the irradiation range.
Therefore, in order to irradiate a range far from the luminaire 101, it is necessary to set a larger angle with respect to the horizontal axis of the first reflector 108.
On the other hand, if the installation angle of the first reflector 108 is increased, it is possible to illuminate a predetermined range of the walking surface away from the luminaire 101, but reflected light does not reach the vicinity of the foot of the luminaire 101. There are challenges.

  In response to this problem, for example, Patent Literature 2 discloses a lighting fixture including a plurality of reflecting plates.

  Specifically, as shown in FIG. 7, a light source 205 is formed at an intermediate portion of the support column 202, a second reflector 209 that reflects light emitted from the light source 205 in the vertical direction upward of the support column 202, and an upper portion of the support column 202. The first reflecting plate 208 that reflects the light reflected upward in the vertical direction by the second reflecting plate 209 obliquely downward in the vertical direction of the support column 202, and an intermediate portion between the light source 205 and the first reflecting plate 208. Thus, an intermediate irradiating unit 217 is provided for reflecting the light emitted from the light source 205 obliquely downward in the vertical direction of the support column 202 to function as a foot lamp.

  That is, a region that is separated from the luminaire 201 is irradiated with the reflected light reflected by the first reflector 208, and the feet of the luminaire 201 are illuminated with the reflected light that is reflected by the intermediate irradiator 217 at the intermediate portion. Therefore, it is possible to uniformly irradiate the entire periphery of the lighting fixture 201.

Japanese Utility Model Publication No. 7-27008 JP 2002-260410 A

As described above, the lighting device described in Patent Document 1 can irradiate a certain range around the lighting device, but there is a problem that reflected light does not reach the feet of the lighting device.
In addition, since the lamp, which is the light source, is located at the same position as or below the pedestrian's line of sight, the pedestrian can visually recognize the lamp body part with exposed wiring and the like. Is bad.

  On the other hand, in the luminaire described in Patent Document 2, an intermediate irradiating unit must be separately prepared in the intermediate portion as a reflecting plate for reflecting light from the light source to the outside of the support column in addition to the first reflecting plate. As a result, the number of parts increases and the product cost increases, and the assembly of the lighting fixture becomes complicated and the assembly man-hour increases.

  Moreover, if it is a lighting fixture provided with a support | pillar with a height, although the space which each arrange | positions a light source, an intermediate | middle irradiation part, and a 1st reflecting plate can be ensured, It is difficult to secure a space for disposing the intermediate irradiation unit.

  The present invention was devised in view of the above points, and is a luminaire with a column mainly disposed in a park, a street, or the like, and a luminaire that can ensure a wide irradiation range, and light. It is an object of the present invention to provide an emission method.

  In order to achieve the above-described object, the lighting fixture of the present invention has a light source arranged at a predetermined position inside the support column and a distance from the light source by a predetermined distance, and the convex portion is directed to the center of the light source. A first reflecting plate in the shape of a cone, and a mirror surface formed on a side surface of the first reflecting plate, the first reflecting plate being formed in a pyramid-like region that includes the convex portion and is substantially similar to the first reflecting plate; And an irregular reflection surface formed in a frustum-shaped region excluding the mirror surface on the side surface of the first reflecting plate, and a light emitting portion supported by the support column.

Here, the first reflecting plate is disposed at a position separated from the light source by a predetermined distance so as to direct the center of the light source, so that the light emitted from the light source is reliably reflected by the first reflecting plate. It can be made.
Moreover, since the 1st reflecting plate is cone-shaped, the light radiate | emitted from the light source can be reflected radially toward all the directions of a lighting fixture.

In addition, a mirror surface is formed on a side surface of the first reflecting plate that includes a convex portion and is substantially similar to the first reflecting plate, so that the light emitted from the light source can be reduced. It can be reflected to the outside of the column at a predetermined angle.
Therefore, it is possible to reliably irradiate the target irradiation region with the reflected light.

  In addition, since the irregular reflection surface is formed on the side surface of the first reflection plate and in the frustum-like region excluding the mirror surface, the light emitted from the light source can be irregularly reflected, so that it is specularly reflected. The reflected light can be applied to, for example, the foot of the lighting fixture other than the reflected light irradiation range.

  Moreover, by providing the light emission part supported by the support | pillar, the reflected light reflected by the 1st reflecting plate can be radiate | emitted reliably to the outward of a support | pillar.

  In order to achieve the above-described object, the lighting fixture of the present invention has a light source arranged at a predetermined position inside the support column and a distance from the light source by a predetermined distance, and the convex portion is directed to the center of the light source. A first reflecting plate in the shape of a cone, and a mirror surface formed on a side surface of the first reflecting plate, the first reflecting plate being formed in a pyramid-like region that includes the convex portion and is substantially similar to the first reflecting plate; And an irregular reflection surface formed in a frustum-shaped region excluding the mirror surface on the side surface of the first reflection plate, and an opening formed in the support column.

Here, the first reflecting plate is disposed at a position separated from the light source by a predetermined distance so as to direct the center of the light source, so that the light emitted from the light source is reliably reflected by the first reflecting plate. It can be made.
Moreover, since the 1st reflecting plate is cone shape, the light radiate | emitted from the light source can be radially reflected to all the directions of a lighting fixture.

In addition, a mirror surface is formed on a side surface of the first reflecting plate that includes a convex portion and is substantially similar to the first reflecting plate, so that the light emitted from the light source can be reduced. It can be reflected to the outside of the column at a predetermined angle.
Therefore, it is possible to reliably irradiate the target irradiation region with the reflected light.

  In addition, since the irregular reflection surface is formed on the side surface of the first reflection plate and in the frustum-like region excluding the mirror surface, the light emitted from the light source can be irregularly reflected, so that it is specularly reflected. The reflected light can be applied to, for example, the foot of the lighting fixture other than the reflected light irradiation range.

  Further, the reflected light reflected by the first reflecting plate can be reliably emitted to the outside of the support by the opening formed in the support.

When the irregular reflection surface is coated with a paint, the light emitted from the light source can be irregularly reflected in various directions by the fine particles contained in the paint.
Therefore, it is possible to irradiate the reflected light, for example, to the foot of the luminaire other than the irradiation range of the specularly reflected light.
Furthermore, since the coating prevents the first reflector from being damaged and prevents contamination, the durability of the first reflector can be improved.

Further, when the irregular reflection surface has an uneven shape, the light emitted from the light source can be irregularly reflected in various directions by the unevenness.
Therefore, it is possible to irradiate the reflected light, for example, to the foot of the luminaire other than the irradiation range of the specularly reflected light.

  When the angle between the mirror surface and the axial direction of the support column is set so that the angle between the axis perpendicular to the axial direction of the support column and the reflected light reflected by the mirror surface is approximately 10 °, As a result, it is possible to reliably irradiate the target irradiation range of the road surface while preventing glare of the pedestrian.

  In addition, in the case where a second reflecting plate that reflects light from the light source in a direction that is substantially parallel to the axial direction of the column and is directed to the first reflecting plate is provided in the vicinity of the light source, the light is emitted from the light source. Since light leakage can be suppressed as much as possible and emitted toward the first reflecting plate, the irradiation efficiency of the luminaire can be further increased.

  In the case of having a light guide plate between the first reflector and the second reflector, in which an opening for guiding the reflected light from the second reflector toward the first reflector is formed. Therefore, the reflected light reflected by the second reflecting plate can be reliably emitted toward the center of the first reflecting plate.

  Further, when the light guide plate covers at least the second reflecting plate in plan view in the axial direction of the column, even if the position of the light source is the same as or lower than the pedestrian's line of sight, for example, wiring connected to the light source, etc. Can be covered with the light guide plate, the appearance of the lighting apparatus is improved.

  Further, when the maximum width of the opening of the light guide plate is L and the maximum width of the mirror surface is A, when L / 2 ≦ A is set, the light is guided from the opening and is transmitted to the first reflecting plate. The amount of incident light can be secured above a certain level, and the intended irradiation range can be secured.

When the maximum width of the opening of the light guide plate is L and the maximum width of the mirror surface is A, when A ≦ L is set, the light guided from the opening in the axial direction of the column On the other hand, it is possible to reliably block light having an angle.
That is, since only the light parallel to the axial direction of the support can be reflected on the mirror surface of the first reflector, the occurrence of glare and light damage can be reliably prevented, and the target irradiation area can be reliably irradiated. be able to.

  In order to achieve the above object, the light emission method of the present invention includes a step of emitting light from a light source disposed at a predetermined position inside the support, and a light from the light source parallel to the axial direction of the support. A step of reflecting in a direction, a step of reflecting a part of the reflected light toward the outside of the support column at an approximately constant angle, and a step of reflecting a part of the reflected light toward the outside of the support column. .

  Here, by including the step of reflecting the light from the light source in a direction parallel to the axial direction of the column, the light from the light source does not leak to the outside of the column, and the irradiation efficiency can be improved.

  Further, by including a step of reflecting a part of the reflected light toward the outside of the support column at a substantially constant angle, the target irradiation region can be reliably irradiated with the reflected light.

  In addition, the irradiation region can be further expanded by including a step of irregularly reflecting a part of the reflected light toward the outside of the column.

  The lighting apparatus and the light emission method according to the present invention can ensure a wide irradiation range.

It is a front view of the lighting fixture which concerns on embodiment of this invention. It is front sectional drawing which shows the upper part of the lighting fixture which concerns on embodiment of this invention. It is an expansion perspective view of a 1st reflecting plate. It is front sectional drawing which shows the characteristic of the light distribution of the lighting fixture which concerns on embodiment of this invention. It is a front view which shows the characteristic of the light distribution of the lighting fixture which concerns on embodiment of this invention. It is a figure which shows a prior art. It is a figure which shows a prior art.

  Hereinafter, embodiments of the present invention relating to a lighting fixture and a light emitting method will be described with reference to the drawings for understanding of the present invention. In addition, in each figure, in the state which installed the lighting fixture 1 in the underground G, the direction which goes to the upper surface from the bottom face of the lighting fixture 1 is defined as an upper direction, and the opposite direction of an upper direction is set as a downward direction for the convenience of explanation. The axial direction defined by the upper direction and the lower direction is defined as the vertical direction. An axial direction perpendicular to the vertical direction is defined as a horizontal direction.

  First, the whole structure of the lighting fixture 1 which concerns on embodiment to which this invention is applied is demonstrated using FIG. 1 and FIG. The luminaire 1 is installed on a side edge of a road, a park, a garden, or the like, for example, and a column 2 and a light emitting unit 3 for emitting light outward at the top of the column 2 are the columns 2. It is supported by. And the lighting fixture 1 radiates | emits the predetermined range of the walking surface W by radiate | emitting light from the light emission part 3. FIG.

  The support column 2 has a cylindrical shape extending in the vertical direction when installed in the underground G, and a part of the lower part is embedded in the underground G. Further, an insertion hole 4 through which a power cable (not shown) is inserted is formed in a portion embedded in the underground G of the column 2, and a power cable (not shown) is drawn into the inside through the insertion hole 4. As a result, power is supplied to the power source 15 of the LED 5.

  Here, the support column 2 does not necessarily have a cylindrical shape. For example, it is possible to select according to the design of the lighting fixture 1 such as a polygonal prism.

  Moreover, the light source does not necessarily need to be LED5. For example, an incandescent bulb, a halogen lamp, a fluorescent lamp, an HID lamp, or the like can be appropriately selected according to the purpose of use.

  The light emitting portion 3 is made of a transparent acrylic resin, and can transmit light from the light source toward the outside of the column 2. The outer diameter of the light emitting portion 3 is approximately the same size as the outer diameter of the column 2, and the outer peripheral surface of the light emitting unit 3 and the outer peripheral surface of the column 2 are substantially flush with each other.

  Here, the light emission part 3 does not necessarily need to be transparent. Any color may be used as long as light can be transmitted.

  Moreover, the material of the light emission part 3 does not necessarily need to be an acrylic resin. Glass, ABS resin, etc. can be selected as appropriate.

  Further, the outer diameter of the light emitting portion 3 does not necessarily have to be as large as the outer diameter of the support column 2. For example, the outer diameter may be smaller than the outer diameter of the support column 2, and the light emitting unit 3 may be narrowed with respect to the support column 2. Further, the outer diameter may be larger than the outer diameter of the support column 2, and the light emitting portion 3 may be shaped to bulge outward from the side surface of the support column 2.

  Further, it is not always necessary to provide a light transmitting member as the light emitting portion 3. For example, you may form an opening part in the side surface of the support | pillar 2 so that it can radiate | emit toward the outward from the support | pillar 2 in the position corresponding to the light emission part 3. FIG.

  The upper end portion of the light emitting portion 3 is covered with a circular container-like cover 6 that opens downward in a state where the support column 2 is installed in the ground G, and the entire upper surface of the light emitting portion 3 is covered. .

  Here, the cover 6 does not necessarily need to be circular. According to the outer diameter shape of the support | pillar 2 or the light emission part 3, it can change suitably.

  Around the LED 5 as a light source, a heat sink 7 for heat dissipation and heat absorption is attached in order to prevent a circuit failure of the power source 15 caused by the self-generated heat of the LED 5. Further, a second reflector 9 is attached to the heat sink 7 so as to surround the tip portion of the LED 5.

  The second reflecting plate 9 has a paraboloid surface that extends from the outer periphery of the LED 5 to the outer side, and has an illumination function that reflects light emitted from the LED 5 upward in the vertical direction of the column 2.

  Here, it is not always necessary to have the second reflecting plate 9. However, by having the second reflecting plate 9, the light emitted from the LED 5 is reflected upward in the vertical direction of the column 2 toward the first reflecting plate to be described later without leaking to the outside of the column 2. Therefore, it is possible to increase the irradiation efficiency.

  In addition, the second reflector 9 does not necessarily need to form a parabolic surface. As long as the light emitted from the LED 5 can be reflected upward in the vertical direction of the support column 2, for example, it may be formed in an arc surface, a flat inclined surface, or an elliptical surface.

The LED 5 and the second reflecting plate 9 are protected by the side surface of the column 2 and the housing 10 supported by the heat sink 7.
In addition, a circular opening for concealing the second reflecting plate 9 and guiding the reflected light reflected by the second reflecting plate 9 upward in the vertical direction of the supporting column 2 in a top plan view of the supporting column 2. A light guide plate 11 having a diameter 12 (diameter L) is integrated with the housing 10.
Further, a transparent resin plate 16 as a spacer is interposed between the light guide plate 11 and the second reflecting plate 9.

  Here, the light guide plate 11 is not necessarily required. However, by having the light guide plate 11, at least the second reflecting plate 9 can be covered. That is, for example, even in a column where the position of the light source is the same as or lower than the pedestrian's line of sight, the light guide plate 11 can cover the second reflector 9, the LED 5, the wiring connected to the LED 5, etc. The appearance of the instrument 1 can be improved.

  Moreover, the opening 12 does not necessarily need to be circular. It is sufficient if a certain amount of light can be guided, and for example, it may be a polygon.

Further, the light guide plate 11 is not necessarily integrated with the housing 10.
For example, the light guide plate 11 may be formed separately and attached to the housing 10 or the side surface of the support column 2.

  A conical (cone-shaped) first reflecting plate 8 formed so that the convex portion 13 is directed to the approximate center of the LED 5 is attached to the cover 6 via a fixed plate 14. As shown in FIG. 3, the region M formed on the substantially conical side surface including the convex portion 13 and having a shape substantially similar to the shape of the first reflecting plate 8 is mirror-finished.

  Here, the first reflector 8 does not necessarily have a conical shape. For example, a polygonal pyramid shape may be used. However, in the case of a conical shape, since the side surface has a smooth R shape, the light reflected from the first reflector is efficiently reflected radially toward all directions outside the column 2. Can do.

  Further, the first reflector 8 does not necessarily have a cone shape having the convex portion 13. For example, a so-called frustum shape may be used in which a pyramid including a convex portion that shares a cone-shaped apex and is similarly reduced is removed. However, in the case of the frustum shape, the top surface of the frustum shape facing the LED 5 is a flat portion having a certain area, and the reflected light of the second reflecting plate 9 is reflected downward in the vertical direction by this flat portion. Therefore, in order to improve the irradiation efficiency to the outside of the support column 2, it is preferably a cone shape.

  The inclination angle α of the region M of the first reflector 8 shown in FIG. 4 has an angle of 35 ° to 45 ° with respect to the vertical direction of the support column 2, and in particular, the inclination angle α is set to 50 °. It is preferable to do.

  The specular reflection light S1 (arrow indicated by the solid line in FIG. 4) reflected by the region M of the first reflecting plate 8 is reflected obliquely downward at a certain angle. Specifically, the reflected light directed upward in the vertical direction of the support column 2 from the second reflecting plate 9 is specularly reflected in the region M, and directed obliquely downward on the side away from the luminaire 1 with respect to the horizontal direction. A certain range of the walking surface W away from the luminaire 1 is irradiated through the emission unit 3.

  Here, the inclination angle α does not necessarily have to be set in the range of 35 ° to 45 °. It can be set as appropriate according to the height of the column 2. However, the outdoor public lighting standard is based on the luminance of the luminaire at the position where the elevation angle β of the reflected light with respect to the horizontal direction is 5 °. Usually, the elevation angle β (= 5 °) in the outdoor luminaire. It is designed to emit light downward.

  In this regard, as a result of repeated experiments by the inventor, at the height of the column 2 according to the embodiment of the present invention (0.8 m), at a radius of 4.0 m centering on the column 2, the outdoor public lighting standard In order to secure the luminance of 1 lux (lx), the elevation angle β (angle formed by the horizontal axis h and the specular reflection light S1) with respect to the horizontal direction of the light emitted from the column 2 is set as shown in FIG. When the angle was 10 °, the brightest luminance could be secured.

  That is, from the position of the walking surface W at a horizontal distance of 4.0 m from the support 2, the elevation angle β of the support 2 with a height of 0.8 m is about 10 ° (in other words, 10 ° downward from the horizontal direction). At this time, the inclination angle α was 40 °, and when the front and rear inclination angles α were set from 35 ° to 45 °, it was confirmed that glare to the pedestrian was minimized while securing the irradiation range.

  As shown in FIG. 2, the upper limit of the maximum width A of the region M is set to be equal to or less than the maximum width L of the opening 12 formed in the light guide plate 11. Further, the lower limit of the maximum width A of the region M is set to be at least half of the maximum width L of the opening 12.

Here, the upper limit of the maximum width A of the region M does not necessarily have to be set to be equal to or less than the maximum width L of the opening 12. However, if the upper limit of the maximum width A of the region M is larger than the maximum width L of the opening 12, the light guided from the opening 12 is bent at the edge of the opening 12, and the vertical direction of the column 2 Light having an angle other than upward light enters the region M.
When light having such an angle enters the region M, the light is reflected upward in the region M from the horizontal direction, causing glare and light pollution. The upper limit is preferably equal to or less than the maximum width L of the opening 12.

In addition, the lower limit of the maximum width A of the region M does not necessarily need to be set to be equal to or more than half of the maximum width L of the opening 12. However, if the upper limit of the maximum width A of the region M is made smaller than half of the maximum width L of the opening 12, the amount of light incident on the region M out of the light emitted from the opening 12 is relatively small. .
Accordingly, since the specular reflected light S1 specularly reflected in the region M becomes weak, the lower limit of the maximum width A of the region M is set to be more than half of the maximum width L of the opening 12 in order to keep the irradiation efficiency constant or higher. It is preferable.

  The region D formed on the substantially frustum-shaped side surface excluding the region M of the first reflecting plate 8 is formed with a diffuse reflection surface coated with a white paint, as shown in FIG. The reflected light reflected from the second reflecting plate can be diffusely reflected (an arrow indicated by a dotted line in FIG. 4 and a symbol S2). The side surface of the region D has a curved shape that is slightly recessed in the vertically upward direction of the column 2.

  Here, the region D does not necessarily need to be a white paint. It is sufficient if light can be irregularly reflected by the fine particles contained in the paint, and any color paint may be selected according to the emission color of the LED 5.

Further, the region D does not necessarily have to be coated with a paint. As long as light can be diffusely reflected in the region D, any surface treatment may be performed. For example, the region D may have an uneven shape.
Furthermore, a surface treatment may be performed by a combination of coating with a paint and an uneven shape.

  In addition, the side surface of the region D does not necessarily have to have a curved shape that is slightly recessed in the vertically upward direction of the support column 2. For example, a linear shape with the inclination angle α maintained from the side surface of the region M may be used. However, by making the side surface of the region D into a curved shape, the irregularly reflected light S2 diffusely reflected in the region D can expand the irradiation range to a position close to the foot of the luminaire 1, so that the curved shape is preferable.

  Next, the light emission method in a state where the lighting fixture 1 configured as described above is installed in the ground G will be described with reference to FIGS. 4 and 5.

  In FIG. 4, the light emitted from the LED 5 is reflected upward in the vertical direction of the column 2 by the second reflecting plate 9.

  Next, the reflected light reflected by the second reflecting plate 9 is guided from the opening 12 of the light guide plate 11 toward the first reflecting plate 8.

  Of the light guided from the opening 12, the light incident on the region M of the first reflector 8 is oblique to the column 2 at a constant angle β with respect to the horizontal axis h according to the inclination angle α of the region M. It is specularly reflected downward.

  The specular reflection light S1 specularly reflected in the region M spreads radially, is emitted from the light emitting unit 3 toward the outside of the support column 2, and irradiates a predetermined range of the walking surface W that is predetermined from the lighting fixture 1. To do.

  On the other hand, of the light guided from the opening 12, a part of the reflected light incident on the region D of the first reflecting plate is irregularly reflected toward the vertical direction of the column 2.

  The irregularly reflected light S2 irregularly reflected in the region D is emitted from the light emitting part 3 toward the outside of the support column 2, and irradiates a predetermined range of the walking surface W including the foot of the lighting device 1 as shown in FIG. To do.

  As described above, the lighting apparatus and the light emission method to which the present invention is applied can ensure a wide irradiation range.

DESCRIPTION OF SYMBOLS 1,101,201 Lighting fixture 2,102,202 Support | pillar 3 Light emitting part 4 Insertion hole 5 LED
105 Lamp 205 Light Source 6 Cover 7 Heat Sink 8, 108, 208 First Reflector 9, 109, 209 Second Reflector 10 Housing 11 Light Guide Plate 12 Opening 13 Convex 14 Fixed Plate 15 Power Supply 16 Transparent Resin Plate 217 Intermediate Irradiation part S1 Specular reflection light S2 Diffuse reflection light G Ground W Walking surface h Horizontal axis

Claims (5)

A light source arranged at a predetermined position inside the column;
A cone-shaped first reflector that is spaced apart from the light source by a predetermined distance and has a convex portion directed to the center of the light source;
A mirror surface formed on a side surface of the first reflecting plate, which includes the convex portion and is formed in a cone-like region substantially similar to the first reflecting plate;
An irregular reflection surface formed on a side surface of the first reflection plate, the frustum-shaped region excluding the mirror surface;
In a lighting fixture comprising a light emitting portion supported by the support column ,
In the vicinity of the light source, a second reflecting plate that reflects light from the light source in a direction that is substantially parallel to the axial direction of the support column and is directed to the first reflecting plate;
An opening is formed between the first reflecting plate and the second reflecting plate to guide the reflected light from the second reflecting plate toward the first reflecting plate, and the support column. A light fixture comprising: a light guide plate that covers at least the second reflection plate in a plan view in the axial direction . The lighting fixture according to claim 1 , wherein the irregular reflection surface is coated with a paint. The lighting apparatus according to claim 1, wherein the irregular reflection surface has an uneven shape. The angle between the mirror surface and the axial direction of the support column is set so that an angle between an axis perpendicular to the axial direction of the support column and reflected light reflected by the mirror surface is approximately 10 °. The lighting fixture of any one of Claim 3 . When the maximum width of the opening is L and the maximum width of the mirror surface is A,
L / 2 ≦ A ≦ L
The lighting fixture according to any one of claims 1 to 4, which is set to be

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