WO2015093392A1 - 照明器具 - Google Patents
照明器具 Download PDFInfo
- Publication number
- WO2015093392A1 WO2015093392A1 PCT/JP2014/082857 JP2014082857W WO2015093392A1 WO 2015093392 A1 WO2015093392 A1 WO 2015093392A1 JP 2014082857 W JP2014082857 W JP 2014082857W WO 2015093392 A1 WO2015093392 A1 WO 2015093392A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- light
- power supply
- led
- light emitting
- lens
- Prior art date
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
- F21S8/08—Lighting devices intended for fixed installation with a standard
- F21S8/085—Lighting devices intended for fixed installation with a standard of high-built type, e.g. street light
- F21S8/086—Lighting devices intended for fixed installation with a standard of high-built type, e.g. street light with lighting device attached sideways of the standard, e.g. for roads and highways
Definitions
- the present invention relates to a lighting fixture equipped with a power source.
- a crime prevention light that illuminates the street is known as one of the lighting fixtures that are installed outdoors to illuminate the road surface.
- crime prevention lamps using LEDs as light sources have been proposed and put into practical use (for example, see Patent Document 1).
- the entire bottom surface of the appliance body is opened as an irradiation opening, and a thin light source installation plate for attaching a light emitting element is provided in the irradiation opening, and is a space between the light source installation plate and the appliance body, and the light source installation plate
- the power supply is arranged behind the.
- the heat radiation performance is improved by forming the light source installation plate with a heat conductive material, but it is desired to further improve the heat radiation performance.
- This invention is made
- the lighting fixture of the present invention includes a fixture main body in which a box-shaped power supply accommodating portion for storing a power source and a mounting surface for mounting a light emitting element are integrally formed of a heat conductive material, and the mounting. And a glove that covers the surface, and the mounting surface is provided so as to surround an outer periphery of the power supply accommodating portion.
- a wiring lead-out hole through which the power supply wiring is drawn out may be formed at the tip of the power supply accommodating portion, and the wire may be connected at the tip of the power supply accommodating portion.
- the instrument main body may have two inclined mounting surfaces in a valley shape, and the power supply accommodating portion may be disposed in the valley portion.
- the plurality of light emitting elements may be arranged so that light from the plurality of light emitting elements can be seen independently.
- the mounting angle of the mounting surface from the horizontal plane may be 20 ° or more and 40 ° or less.
- each of the light emitting elements may include a lens, and may include a lens cover that covers the substrate of the light emitting element, and the lens may distribute the light of the light emitting element in the distance.
- the lens cover may be configured to be rotationally symmetrical, and may be disposed rotationally symmetrically on the two mounting surfaces.
- a diffusible glove that covers the mounting surface is provided, and a part of the diffusive part that generates a light beam above the horizontal by diffusing the glove may have a lower diffusivity than the other part. Good.
- an optical control member that distributes the light distributed through the lens to the vicinity of the instrument or far from the instrument may be provided.
- the optical control member may have a plurality of inclined surfaces having different angles.
- the optical control member may be configured to be rotationally symmetrical.
- the Japanese Patent Application / Japanese Patent Application No. 2013-261753 and the Japanese Patent Application / Japanese Patent Application No. 2013-261827 filed on December 18, 2013 and the application filed on December 10, 2014 are included in this specification. It is assumed that all the contents of the Japanese patent application / Japanese Patent Application No. 2014-249872 that have been made are included.
- a box-shaped power supply housing portion for storing a power source and a mounting surface to which the light emitting element is attached are integrally formed of a heat conductive material to constitute the instrument body. Since heat can be radiated from the entire fixture body including the radiant fixture, the radiating performance of the lighting fixture can be improved.
- FIG. 1 is a perspective view showing a security light (lighting fixture) according to a first embodiment of the present invention.
- FIG. 2 is a perspective view showing the security light from the rear.
- FIG. 3 is a view showing a security light, in which (A) is a plan view, (B) is a side view, (C) is a bottom view, (D) is a front view, and (E) is a rear view.
- 4 is a cross-sectional view taken along the line AA in FIG. 5 is a cross-sectional view taken along the line BB in FIG.
- FIG. 6 is an exploded perspective view of the security light with the light source part disassembled.
- FIG. 7 is an exploded perspective view of a security light with the power supply unit disassembled.
- FIGS. 11A and 11B are views showing the instrument main body, in which FIG. 8A is a plan view, FIG. 8B is a side view, FIG. 8C is a bottom view, FIG. 8D is a front view, and FIG. FIG. 9 is a perspective view showing the light source unit.
- FIG. 10 is an exploded perspective view showing the LED module.
- FIGS. 11A and 11B are diagrams showing the lens cover together with the LEDs, where FIG. 11A is a plan view, FIG. 11B is a front view, FIG. 11C is a side view, and FIG. 12 is a cross-sectional view showing the lens cover of FIG.
- FIG. 11 is a cross-sectional view taken along line FF in FIG.
- FIG. 14 is an explanatory diagram of the light distribution of the security light.
- FIG. 15 is a perspective view showing a security light equipped with a glove according to a modification of the present invention.
- 16 is a cross-sectional view taken along the line FF in FIG.
- FIG. 17 is an exploded perspective view showing a security light provided with an appliance body according to a modification of the present invention.
- FIG. 18 is a diagram showing FIG. 17 from the lower front side.
- FIG. 19 is a perspective view showing an LED substrate of the present invention.
- FIG. 15 is a perspective view showing a security light equipped with a glove according to a modification of the present invention.
- 16 is a cross-sectional view taken along the line FF in FIG.
- FIG. 17 is an exploded perspective view showing a security light provided with an appliance body according to a modification of the present invention.
- FIG. 18 is a diagram showing FIG. 17 from the
- FIG. 20 is a plan view of FIG.
- FIG. 21 is an exploded perspective view showing a security light according to the second embodiment.
- FIG. 22 is a longitudinal sectional view showing a security light.
- 23A and 23B are diagrams showing the optical control member, in which FIG. 23A is a plan view, FIG. 23B is a front view, FIG. 23C is a bottom view, and FIG. 24 is a cross-sectional view taken along the line GG in FIG.
- FIGS. 25A and 25B are ray diagrams.
- FIG. 25A shows a case where an optical control member is not provided
- FIG. 25B shows a case where an optical control member is provided.
- FIG. 1 is a perspective view showing a security light 1 according to the first embodiment
- FIG. 2 is a perspective view showing the security light 1 from the rear.
- FIG. 3 is a view showing the security light 1
- FIG. 3 (A) is a plan view
- FIG. 3 (B) is a side view
- FIG. 3 (C) is a bottom view
- FIG. 3 (D) is a front view
- 3 (E) is a rear view.
- 4 is a cross-sectional view taken along the line AA in FIG. 3
- FIG. 5 is a cross-sectional view taken along the line BB in FIG.
- FIG. 6 is an exploded perspective view of the security light 1 with the light source unit 6 disassembled.
- the applicant Prior to the description of the configuration of the security light 1, knowledge about glare obtained by the applicant will be described. Through various experiments, the applicant has obtained the knowledge that the glare can be reduced as the brightness of the light emitting part, which is recognized by humans, is made uniform. In addition, the applicant has obtained the knowledge that when the central portion of the light emitting portion is darker than the edge of the light emitting portion, the luminance distribution on the light emitting portion becomes uniform and glare can be reduced. Furthermore, the applicant has obtained the knowledge that glare can be reduced if the light from the light emitting element appears independently.
- (T-1.5) corresponds to the height of the lamp viewed from the height of the pedestrian's eyes (about 1.5 m).
- this glare zone ⁇ it was found that glare can be reduced by setting the illuminance in front of the eye to 8 lx or less and the equivalent light curtain luminance to 0.2 cd / m 2 or less. Further, the inventors have found that the glare can be reduced by setting the maximum brightness of the lamp to 170,000 cd / m 2 or less and the average brightness of the lamp to 53,000 cd / m 2 or less.
- the applicant recognizes that the larger the area of the light emitting portion (hereinafter referred to as the area on the appearance) that the person recognizes, the lower the luminance of the light emitting surface. And gained knowledge that glare can be reduced. Furthermore, the applicant has found that by making the central part of the light emitting part darker than the edge part of the light emitting part, the area where the luminance distribution on the light emitting part looks uniform is increased and the glare can be felt low. Got.
- the security light 1 is configured to reduce glare based on such knowledge.
- the crime prevention light 1 illuminates the street with a predetermined brightness for the purpose of crime prevention, and as shown in FIGS. 1 to 3, has an appliance main body 2 that extends and is installed on the road surface.
- the instrument body 2 of the present embodiment is formed in a thin plate shape that is substantially rectangular in bottom view and extends from the road surface side front end 2A to the rear end 2B.
- the rear end 2B is provided with a fixture 3 for fixing the instrument main body 2 to a fastener Q fixed to, for example, a utility pole P or the like.
- the instrument body 2 is provided with a resin globe 4 covering the irradiation opening 8 on the bottom surface of the instrument body 2, with the entire bottom surface opening as an irradiation opening 8.
- a mounting surface 5 is formed integrally with the irradiation opening 8, and an LED module (light emitting element module) 10 is assembled on the mounting surface 5 to constitute a light source unit 6.
- the light source unit 6 is configured to have a light distribution that illuminates a wide area extending in the traffic direction of the street corresponding to both sides of the appliance body 2 as well as directly below the appliance body 2 on the street (including the front side). Yes.
- the light source unit 6 includes the LED module 10 that illuminates the two directions of the traffic direction.
- the LED module 10 includes a plurality (22 in the illustrated example) of LEDs (light emitting elements) 11.
- the instrument main body 2 includes a power supply accommodating portion 20 that houses a power supply portion (power supply) 7 for lighting the LED module 10, and the power supply accommodating portion 20 and the mounting surface 5 are integrally formed.
- the instrument body 2 is formed using a material (for example, aluminum or aluminum alloy) that has corrosion resistance enough to withstand outdoor use and that has high thermal conductivity. By using a highly heat conductive material, the heat generated by the LED module 10 is dissipated from the fixture body 2, and the light source temperature of the LED module 10 is maintained at a temperature suitable for the light emitting operation.
- the instrument main body 2 is provided with a surrounding wall 31 having a rectangular frame shape surrounding the attachment surface 5, and by making the light source chamber 32 inside the surrounding wall 31 watertight,
- the light source chamber 32 is waterproofed. That is, the tip 31A of the surrounding wall 31 is in close contact with the packing 9 of the globe 4 so that the inside of the surrounding wall 31 is sealed in a watertight manner.
- the globe 4 is formed of a light transmissive and diffusive material (for example, resin), and the light of the LED 11 is diffused by the globe 4 to reduce glare.
- the globe 4 is formed so as to bulge directly downward so as to cover the mounting surface 5 from below, and the lower portion of the globe 4 is a flat portion 4A formed flat.
- the globe 4 has a through hole 4B penetrating the globe 4 in the vertical direction, and a filter 36 (FIG. 17) is provided in the through hole 4B.
- the filter 36 includes a water vapor impermeable filter that does not transmit water and water vapor in addition to dust, and the filter 36 removes dust and water vapor from the air passing through the through hole 4B.
- the LED module 10 when the LED module 10 is turned on, the air in the light source chamber 32 is heated and expanded by the heat generated by the LED module 10, and thus the air in the light source chamber 32 is discharged to the outside from the through hole 4B.
- the LED module 10 when the LED module 10 is turned off, the air heated and expanded by the heat generated by the LED module 10 is cooled and contracted by the external atmospheric temperature or the like, so that the external air enters the light source chamber 32 from the through hole 4B. It becomes.
- FIG. 7 is an exploded perspective view of the security light 1 with the power supply unit 7 disassembled.
- the power supply accommodating portion 20 extends from the front end 2 ⁇ / b> A to the rear end 2 ⁇ / b> B of the instrument main body 2, and opens in the rear end 2 ⁇ / b> B as the accommodating portion opening 21. It is formed in a cylindrical shape.
- the upper surface 20A of the power supply accommodating portion 20 is provided to be inclined so that the height decreases from the rear end 2B to the front end 2A.
- the instrument body 2 is molded by casting (more specifically, aluminum die-casting), and a mold is formed when the instrument body 2 is molded by inclining the upper surface 20A of the power supply accommodating portion 20. Since it becomes easy to pull out, the instrument main body 2 can be formed easily.
- the power supply unit 7 is configured by attaching a power supply board 7B mounted with an electronic member 7A to a power supply mounting plate 7C.
- An illuminance sensor 7D is attached to the power supply attachment plate 7C.
- Electrical components such as the electronic member 7A and the illuminance sensor 7D are provided with insulating sheets such as a power insulating sheet 7E and a sensor insulating sheet 7F, respectively.
- the power source unit 7 is accommodated in the power source accommodating unit 20 through the accommodating unit opening 21.
- a sensor exposure hole 22 that exposes the illuminance sensor 7D is formed at a position corresponding to the illuminance sensor 7D on the upper surface 20A of the power supply housing portion 20, and a sensor cover 23 is attached to the sensor exposure hole 22.
- the illuminance sensor 7D is provided on the upper surface 20A of the power supply housing unit 20 so that the light from the light source unit 6 does not affect the detection of the illuminance sensor 7D.
- the position is not limited to this.
- the illuminance sensor 7D may be provided, for example, on the side surface of the instrument body 2 as long as the light from the light source unit 6 does not affect the detection of the illuminance sensor 7D.
- a main body cover 25 is fixed to the housing opening 21 via a packing 24, and the above-described fixing bracket 3 is fixed to the main body cover 25.
- a wiring lead-in hole 26 is opened in the main body lid 25, and a primary-side electric wiring (not shown) is drawn into the power supply accommodating part 20 from the outside through the wiring lead-in hole 26.
- a bushing 27 is fitted into the wiring drawing hole 26, and the bushing 27 is wired through the primary side electric wiring.
- the power supply accommodating portion 20 is configured with a waterproof structure by the sensor cover 23, the packing 24, and the bushing 27.
- FIG. 8 is a view showing the instrument body 2 from which the globe 4 and the LED module 10 have been removed.
- FIG. 8 (A) is a plan view
- FIG. 8 (B) is a side view
- FIG. 8 (C) is a bottom view
- 8 (D) is a front view
- FIG. 8 (E) is a rear view.
- the mounting surface 5 is formed integrally with the power supply accommodating portion 20 so as to surround the outer periphery of the power supply accommodating portion 20, more specifically, the bottom surface 20B and both side surfaces 20C and 20D.
- the power supply housing portion 20 and the mounting surface 5 are integrally formed of a heat conductive material to form the fixture body 2, the heat of the LED module 10 is dissipated from the entire fixture body 2 including the power supply accommodation portion 20. Since it can do, the heat dissipation of the crime prevention light 1 can be improved.
- the power supply accommodating part 20 and the attachment surface 5 are integrally formed and the power supply accommodating part 20 is used as a housing, no mounting bracket for attaching the LED module 10 is required, so that the security light 1 can be reduced in size. .
- the security light 1 has a configuration in which the mounting surface 5 formed integrally with the power supply housing portion 20 is simply covered with the globe 4, it can have a simple structure.
- the mounting surface 5 is disposed obliquely with respect to the horizontal plane H. Thereby, compared with the case where the attachment surface 5 is arrange
- the mounting angle ⁇ of the mounting surface 5 from the horizontal plane H is set to 20 ° or more and 40 ° or less. By setting the mounting angle ⁇ to 20 ° or more, the LED module 10 can be arranged facing far away, and thus far away can be irradiated. In addition, by setting the mounting angle ⁇ to 40 ° or less, it is possible to suppress the upward upward light flux that is unnecessary for the security light 1.
- the two attachment surfaces 5 are arrange
- the two mounting surfaces are provided obliquely with respect to the horizontal plane H and arranged in a valley shape.
- the two mounting surfaces 5 are connected at the lower end 5B and arranged in a substantially V shape in front view. Yes.
- the power supply accommodating portion 20 is arranged in the valley portion 33 between the two attachment surfaces 5 such that the bottom surface 20B of the power supply accommodating portion 20 is lower than the upper end 5A of the attachment surface 5.
- an instrument main body compared with the case where the power supply accommodating part 20 is arrange
- the height of 2 can be suppressed.
- the length of the instrument body 2 in the front-rear direction can be reduced as compared with the case where the power supply accommodating portion 20 is disposed behind the attachment surface 5.
- a wiring lead hole 28 through which an electric wiring is drawn is formed at the tip 20 ⁇ / b> E of the power supply housing portion 20, and a secondary-side electric wiring (not shown) extending from the power supply portion 7 through the wiring lead hole 28 is formed. ) Is outside the power supply housing 20 and is drawn out to the light source chamber 32.
- the LED module 10 is arranged so that the connector 12 for connecting the secondary side electric wiring is located on the tip 20E side of the power supply accommodating portion 20, and the electric wiring passed through the wiring drawing hole 28 is Connected to the connector 12.
- the wiring lead-out hole 28 is formed at the tip 20E of the power supply accommodating portion 20, and the secondary-side electrical wiring is connected by the tip 20E.
- the secondary-side electrical wiring can be wired with the minimum necessary length.
- the tip 20E of the power supply accommodating portion 20 is on the same plane as the tip 5C of the mounting surface 5, but the tip 20E of the power supply accommodating portion 20 coincides with the tip 5C of the mounting surface 5 in the front-rear direction. It does not have to be.
- the upper end 5 ⁇ / b> A of the mounting surface 5 and the power supply accommodating portion 20 are connected to each other so that the upper surface 2 ⁇ / b> C of the instrument body 2 positioned above the mounting surface 5 is planar.
- the security light 1 is attached in a posture in which the tip 2 ⁇ / b> A is directed upward so that the upper surface 2 ⁇ / b> C is inclined backward and downward.
- rainwater or snow that pours onto the upper surface 2C is moved rearward and dropped smoothly.
- the upper surface 2C is formed in a planar shape, it is possible to prevent dust such as fallen leaves from accumulating on the upper surface 2C.
- the thickness of the outer edge portion 34 surrounded by the upper end 5A portion of the mounting surface 5 and the upper surface 2C is increased.
- a defect (sink) in which a dent is formed on the surface of the thick part of the molded product may occur. Therefore, in the present embodiment, a plurality of grooves 35 are formed in the outer edge portion 34 of the mounting surface 5. These grooves 35 are provided across a predetermined width from the upper end 5 ⁇ / b> A of the mounting surface 5, and are disposed between the plurality of LEDs 11.
- the thickness of the outer edge portion 34 can be reduced by the groove 35, it is possible to prevent sinks in the instrument body 2. Moreover, since the area which contacts the air of the instrument main body 2 becomes large by forming the groove
- the rear end 5D of the attachment surface 5 protrudes downward from the lower end 5B of the attachment surface 5, but is not limited to this.
- the lower portion of the rear end 5D is made to coincide with the lower end 5B. May be.
- the rear part of the globe 4 is supported under the rear end 5D.
- the rear end 5D is located on the front end side with respect to the rear end 2B of the power supply accommodating portion 20, but may coincide with the rear end 2B.
- the LED modules 10 are respectively disposed on the two mounting surfaces 5 configured as described above.
- FIG. 9 is a perspective view showing the light source unit 6, and FIG. 10 is an exploded perspective view showing the LED module 10.
- 11A and 11B are diagrams showing the lens cover 40 together with the LEDs 11.
- FIG. 11A is a plan view
- FIG. 11B is a front view
- FIG. 11C is a side view
- FIG. It is. 12 is a sectional view showing the lens cover 40 of FIG. 11.
- FIG. 12A is a sectional view taken along the line CC
- FIG. 12B is a sectional view taken along the line DD
- FIG. 12C is a sectional view taken along the line EE.
- FIG. 13 is a cross-sectional view taken along line FF in FIG.
- the two LED modules 10 are arrange
- the LED module 10 includes a plurality of LEDs 11 arranged on a rectangular plate-shaped LED substrate (substrate) 13, and covers the LED substrate 13 with a lens cover 40 having a lens 41 for each LED 11. It is provided so that it is configured in a bar shape.
- the LED module 10 is configured such that the same amount of current flows through the plurality of LEDs 11, and includes a connector 12 that connects electrical wiring from the power supply unit 7 to one end in the longitudinal direction of the LED substrate 13.
- the LED module 10 has a screw hole 14 formed in the approximate center of the LED substrate 13, and is assembled by being screwed to the mounting surface 5 in the approximate center of the LED substrate 13. As shown in FIG. 5, the screw 15 at the time of screwing passes through the LED substrate 13 and the lens cover 40, and is fastened to be fixed to the mounting surface 5.
- the LED 11 is an LED that emits white light, and is mounted with the optical axis K oriented substantially perpendicular to the substrate surface of the LED substrate 13 as shown in FIG.
- the LED 11 can be regarded as a substantially point light source that emits light from a light emitting unit including a light emitting point G (a point having the maximum luminance) (FIG. 13), and the plurality of LEDs 11 are configured so that the light emitting point G can be seen independently. , Spaced apart. This interval is set according to the light output of the LED 11.
- the fact that the light emitting points G are seen independently does not mean that the light emitting points G of the adjacent LEDs 11 are completely dark, but may have a certain level of brightness.
- the evaluation of whether or not the light emission point G can be seen independently is based on the height of the pedestrian's line of sight (about 1.5 m) and the effective visual field when viewed in the walking direction (up and down 20 °, left and right 30 °). It is evaluated with. As described above, the glare can be reduced by arranging the LEDs 11 so that the lights of the plurality of LEDs 11 can be seen independently.
- the LED 11 includes a plurality of outer LEDs (outer light emitting elements) 11A arranged along the edge 13A of the LED substrate 13 and inner LEDs (inner light emitting elements) 11B arranged inside these outer LEDs 11A. .
- the LEDs 11 are arranged in multiple rows (three rows in the illustrated example) in the left-right direction, and are arranged in a staggered manner with the positions shifted in the arrangement direction. More specifically, the outer LEDs 11A in the outer rows are arranged so that the front and rear positions are the same, and the inner LEDs 11B in the inner rows are arranged so as not to overlap the outer LEDs 11A in the outer rows in the left-right direction. Yes.
- the LEDs 11 are arranged in multiple rows and in a staggered manner, interference of light between the LEDs 11 can be prevented, and uneven illumination can be prevented. Furthermore, when the lens cover 40 is injection-molded with a material such as a resin, the lenses 41 are arranged in a staggered manner, so that the material can easily flow into the lens 41 and the lens cover 40 can be easily formed.
- the light output of the plurality of inner LEDs 11B is made smaller than the light output of the plurality of outer LEDs 11A. More specifically, the number (6) of inner LEDs 11B in the inner row is smaller than the number (8) of outer LEDs 11A in both outer rows.
- the substantially center part of the LED module 10 becomes darker than an edge part, the luminance distribution on the appearance of the LED module 10 becomes uniform, and glare can be reduced.
- the substantially central part of the LED module 10 is darker than the edge part, the area where the luminance distribution on the LED module 10 in the glare zone ⁇ is felt to be uniform increases, and the glare is felt low. Furthermore, it becomes easy to arrange the LEDs 11 in a staggered manner by reducing the number of the inner LEDs 11B.
- a high-efficiency LED (high-efficiency light-emitting element) 11C having a light emission efficiency higher than that of the outer LED 11A is used for at least one of the inner LEDs 11B.
- a high-efficiency LED 11C having a light emission efficiency higher than that of the outer LED 11A is used for at least one of the inner LEDs 11B.
- an LED that is not highly efficient is referred to as a low-efficiency LED 11D.
- low-efficiency LEDs (low-efficiency light emitting elements) 11D are arranged between the high-efficiency LEDs 11C in the inner row.
- the lens cover 40 has a flat plate portion 42 made of a transparent resin, and the lens 41 is integrally molded on the surface 42 ⁇ / b> A of the flat plate portion 42.
- the flat plate portion 42 has a substantially rectangular shape, and a screw hole 43 is formed at a substantially center thereof.
- the lens cover 40 is fixed to the mounting surface 5 through the screw hole 43 through the screw 15 (FIG. 5).
- the LED substrate 13 and the lens cover 40 are fastened together with screws, thereby preventing the positional deviation between each lens 41 and the LED 11 on the LED substrate 13.
- a positioning boss 44 is erected on the back surface 42B of the flat plate portion 42 of the lens cover 40.
- a positioning hole 16 for receiving the positioning boss 44 is formed.
- the LED board 13 and the lens cover 40 are positioned at a more accurate position.
- the lens cover 40 includes a lens 41 for each LED 11, accurate positioning of these lenses 41 is performed at a time.
- one of the LED substrate positioning holes 16 at substantially the center is the same size as the screw hole 14 of the LED substrate 13 and is disposed at a symmetrical position.
- Each of the lenses 41 is disposed at a position overlapping the corresponding LED 11 as shown in FIG.
- the lens 41A corresponding to the high efficiency LED 11C has the same shape and controls the emitted light of the high efficiency LED 11C with the same light distribution characteristics.
- the lens 41B corresponding to the low efficiency LED 11D has the same shape and controls the emitted light of the low efficiency LED 11D with the same light distribution characteristic.
- the lens 41 has an incident surface 45 that is curved convexly on the inner surface of the lens (that is, concave when viewed from the bottom), and is convex on the outer surface of the lens with respect to the incident surface 45.
- the exit surface 46 is provided.
- a concave portion is formed on the back surface of the lens 41 by the incident surface 45, and the LED 11 enters the concave portion.
- the LED 11 radiates light substantially radially around the optical axis K, and the lens 41 distributes the radiated light in one direction (lateral direction in the present embodiment) (one-side light distribution). It is configured. Specifically, the LED 11 is arranged close to one side in the left-right direction with respect to the emission surface 46 formed in a substantially hemispherical shape, and the lens 41 radiates light toward the other side in the left-right direction. Thus, since the lens 41 is configured to distribute the light of the LED 11 in the distance, the lens 41 can irradiate far in the traffic direction on the road surface, and thus can irradiate in a relatively wide range.
- the lens 41B corresponding to the low efficiency LED 11D is configured to irradiate light farther than the lens 41A corresponding to the high efficiency LED 11C.
- the lens cover 40 has an exposure opening 47 that exposes a part of the plurality of inner LEDs 11 ⁇ / b> B.
- the exposure opening 47 is disposed on the side close to the edge 13 ⁇ / b> A of the LED substrate 13.
- the substantially central part of the LED module 10 is darker than the edge part, the area where the luminance distribution on the LED module 10 in the glare zone ⁇ is felt to be uniform increases, and the glare is felt low.
- the lens cover 40 is injection-molded with a material such as a resin, for example, the exposure opening 47 is provided on the side close to the edge 13A of the LED substrate 13, so that the material can easily flow to the lens 41 portion. Can be easily formed.
- the high efficiency LED 11C is used for the inner LED 11B near the edge 13A of the LED substrate 13 in the inner row, and the exposure opening 47 is provided at the position of the high efficiency inner LED 11B.
- the LED module 10 is configured to be rotationally symmetric.
- the lens cover 40 is configured to be rotationally symmetric with respect to the LED substrate 13.
- the lens cover 40 has a connector groove 48 that avoids the connector 12 of the LED substrate 13, and has two connector grooves 48 for the connector 12.
- the LED board 13 has two holes at the center, one of which functions as a screw hole 14 corresponding to the screw hole 43 of the lens cover 40, and the other one for positioning corresponding to the positioning boss 44 of the lens cover 40. It functions as the hole 16. Since the LED module 10 is thus configured to be rotationally symmetric, the LED module 10 can be used in common for the two mounting surfaces 5, thereby reducing the types of components and simplifying the manufacturing process.
- the LED module 10 is configured as a one-sided light distribution, and the LED module 10 is disposed rotationally symmetrically on the two attachment surfaces 5 provided back to back, it is possible to irradiate far away in both directions of the traffic direction on the road surface. Irradiation over a relatively wide range.
- the LED module 10 light from the low-efficiency LED 11D arranged mainly on the edge 13A of the LED substrate 13 is irradiated to a distant area through the lens 41A. Further, the light of the high-efficiency LED 11 ⁇ / b> C that is disposed on the inner side and that corresponds to the exposure opening 47 is irradiated through the exposure opening 47 to an area immediately below. And the light of high efficiency LED11C corresponding to the lens 41B while being arrange
- FIG. 14 is an explanatory diagram of the light distribution of the security light 1.
- the security light 1 configured as described above reduces the glare, and the recommended standard for security light "Class B" (Japan Security Equipment Association Technical Standard SES E1901-3) is set to 38m. Can be achieved. That is, as shown in FIG. 14, the security light 1 is disposed at a height T of 4.5 meters from the road surface R of a 5-meter wide street, and the traffic on the road surface R from directly below by one LED module 10. It is possible to irradiate an area of the entire road surface extending 19 m along one direction of the direction S.
- Class B Japanese Security Equipment Association Technical Standard SES E1901-3
- the crime prevention light 1 has an illuminance in front of 8 lx or less, an equivalent light screen luminance of 0.2 cd / m 2 or less, a maximum luminance of the lamp of 170,000 cd / m 2 or less, and an average luminance of the lamp of 53, Since it becomes 000 cd / m 2 or less, the glare can be reduced as described above.
- the instrument main body 2 in which the box-shaped power supply accommodating portion 20 that houses the power supply portion 7 and the attachment surface 5 to which the LED module 10 is attached are integrally formed of a heat conductive material.
- the globe 4 that covers the mounting surface 5, and the mounting surface 5 is provided so as to surround the outer periphery of the power supply accommodating portion 20. Since the power supply housing part 20 and the mounting surface 5 are integrally formed of a heat conductive material to form the instrument body 2, the heat of the LED module 10 can be dissipated from the entire instrument body 2 including the power supply accommodation part 20, so that the crime prevention The heat dissipation of the lamp 1 can be improved.
- the mounting surface 5 is provided so as to surround the outer periphery of the power supply housing portion 20, the height of the instrument body 2 can be suppressed as compared with the case where the power supply housing portion 20 is disposed above the mounting surface 5.
- the length of the instrument body 2 in the front-rear direction can be reduced as compared with the case where the power supply accommodating portion 20 is disposed behind the attachment surface 5.
- the wiring lead-out hole 28 for leading out the secondary side electric wiring of the power supply unit 7 is formed at the distal end 20E of the power supply accommodating unit 20, and the connection is made at the distal end 20E of the power supply accommodating unit 20.
- the instrument body 2 has the two mounting surfaces 5 that are inclined in a valley shape, and the power supply accommodating portion 20 is disposed in the valley portion 33.
- the height of the instrument body 2 can be suppressed as compared with the case where the power supply accommodating portion 20 is disposed above the attachment surface 5.
- the length of the instrument body 2 in the front-rear direction can be reduced as compared with the case where the power supply accommodating portion 20 is disposed behind the attachment surface 5.
- the mounting surface 5 to which the plurality of LEDs 11 are attached is arranged obliquely with respect to the horizontal plane H, and the LEDs 11 are arranged so that the light of the plurality of LEDs 11 can be seen independently. Since the mounting surface 5 is arranged obliquely with respect to the horizontal plane H, the area on the LED module 10 in the glare zone ⁇ becomes larger and glare can be reduced compared to the case where the mounting surface 5 is arranged horizontally. Moreover, since LED11 was arrange
- the LED module 10 can be arranged facing far away, and thus far away can be irradiated.
- the mounting angle ⁇ of the mounting surface 5 from the horizontal plane H is set to 40 ° or less, the upward upward luminous flux that is unnecessary for the security light 1 can be suppressed.
- each LED 11 has a lens 41, the lens cover 40 that covers the LED substrate 13 of the LED 11 is provided, and the lens 41 is configured to distribute the light of the LED 11 in the distance.
- the LED module 10 including the plurality of LEDs 11 is configured to be rotationally symmetric, the two mounting surfaces 5 are provided back to back, and the LED module 10 is disposed to be rotationally symmetric on the mounting surface 5. . Since the two mounting surfaces 5 are provided back to back, it is possible to irradiate far distances in both directions of the traffic direction on the road surface, so that a relatively wide range can be irradiated. Further, since the LED module 10 is configured to be rotationally symmetric, the LED module 10 can be used in common for the two mounting surfaces 5, so that the types of components can be reduced and the manufacturing process can be simplified.
- the LED module 10 is configured as a one-sided light distribution, and the LED module 10 is disposed rotationally symmetrically on the two attachment surfaces 5 provided back to back, it is possible to irradiate far away in both directions of the traffic direction on the road surface. Irradiation over a relatively wide range.
- the above-described embodiment is an aspect of the present invention, and it is needless to say that the embodiment can be appropriately changed without departing from the gist of the present invention.
- the entire globe 4 is formed of a material having diffusibility, but is not limited thereto.
- the globe 4 causes a relatively large amount of upward luminous flux due to diffusion at the edge 4C (FIG. 6) close to the LED 11. Therefore, for example, like the globe 104 shown in FIGS. 15 and 16, the diffusibility of the upper light beam diffusion portion (part) 104C that generates a relatively large amount of light beam above the horizontal by diffusion is made lower than that of the other portions. Also good.
- the upper light beam diffusing portion 104C is a portion up to the edge 104D located above the lens 41 closest to the globe 104.
- the range is not limited to this.
- the entire upper part of the lens 41 closest to the globe 104 is the upper light beam diffusion part 104C, and the upper light beam diffusion part 104C may be an edge (part) of the globe 104 not including the edge 104D. .
- the upper end 5A of the attachment surface 5 and the power supply accommodating portion 20 are connected in a planar shape, and the plurality of grooves 35 are formed in the outer edge portion 34 of the attachment surface 5 that is thick.
- the configuration is not limited to this.
- the upper end 5A of the attachment surface 5 and the power supply accommodating part 20 may be connected to the upper surface 2C of the instrument main body 2 so as to have a recess 202D.
- the groove 35 formed in the mounting surface 5 can be omitted as shown in FIG.
- the LEDs 11 are arranged in multiple rows, but the arrangement of the LEDs 11 is not limited to this.
- the LEDs 11 may be arranged in a circle on the LED substrate 313.
- the plurality of LEDs 11 are arranged along the edge 13A of the LED substrate 113, the LEDs 11 are arranged inside the plurality of LEDs 11, and the light output of the inner LED 11 is changed along the edge 13A of the LED substrate 13. It is set as the structure made smaller than the light output of outer side LED11 arrange
- high efficiency LED11C with high luminous efficiency is provided inside.
- the LEDs 11 are arranged in multiple rows (3 rows in the illustrated example) in the radial direction, and the positions of the LEDs 11 are shifted in the circumferential direction that is the arrangement direction.
- the crime prevention lamp 1 is exemplified as the lighting device according to the present invention.
- the present invention is naturally applicable to various lighting devices used outdoors or indoors.
- an optical control member 450 that suppresses the upward emission of light is provided.
- FIG. 21 is an exploded perspective view showing a security light 400 according to the second embodiment
- FIG. 22 is a longitudinal sectional view showing the security light 400
- 23A and 23B are diagrams showing the optical control member 450.
- FIG. 23A is a plan view
- FIG. 23B is a front view
- FIG. 23C is a bottom view
- FIG. 23D is a side view. is there.
- 24 is a cross-sectional view taken along the line GG in FIG.
- the optical control member 450 is provided in each of two traffic directions, and specifically, is disposed between the lens cover 40 and the globe 4.
- the optical control member 450 is provided at least in a portion through which light traveling upward or far from the lens cover 40 passes.
- the innermost row of LEDs 11 starts from the point where the light M traveling from the LED 11 facing the outermost row LED 11 to the outermost (uppermost) row among a plurality of rows (three rows) passes.
- the optical axis K are provided up to the optical axis K.
- the outer side (the upper end 5A side of the mounting surface 5) is referred to as the instrument outer side
- the inner side (the lower end 5B side of the mounting surface 5) is referred to as the instrument inner side.
- the incident surface 450A on the front surface side of the optical control member 450 is formed substantially parallel to the mounting surface 5, and the exit surface 450B on the back surface side is formed as an inclined surface inclined with respect to the incident surface 450A.
- the inclined surface has a direction in which light incident on the inclined surface is distributed toward the inside of the instrument, in other words, a direction in which the vertical angle is reduced.
- the exit surface 450B has a plurality of stepped portions 451 and is formed in a step shape, whereby a plurality of exit surfaces 452A to 452C are formed on the exit surface 450B. Since the emission surface 450B has a stepped shape, the thickness of the optical control member 450 can be reduced, and the optical control member 450 can be manufactured easily and inexpensively. In addition, since the emission surface 450B has a stepped shape, a plurality of emission surfaces 452A to 452C can be provided, so that the light beams can be divided and the degree of freedom of light distribution control can be improved.
- the inclination angles of the plurality of exit surfaces 452A to 452C are made different.
- at least one (two in the present embodiment) emission surfaces 452A and 452B are provided on the outside of the device as inclined surfaces, and from the emission surfaces 452A and 452B on the inside of the device.
- at least one exit surface 452C (one in this embodiment) is provided in the direction in which the incident angle is close to 90 °.
- the attachment angle ⁇ of the attachment surface 5 from the horizontal plane H is about 30 °
- the inclination angles ⁇ of the emission surfaces 452A and 452B are substantially equal (about 8 °).
- the inclination angles of the exit surfaces 452A and 452B may be varied.
- three emission surfaces 452A to 452C are formed in the two rows of LEDs 11 on the outer side of the device, but the optical control member 450 is provided only up to the optical axis K of the innermost row of LEDs 11, and therefore the innermost row.
- the LED 11 is provided with only one exit surface 452A.
- the exit surface 452C is formed as a flat surface substantially parallel to the entrance surface 450A. Since the emission surface 452B radiates toward the inside of the instrument, a portion where light is concentrated at the joint between the emission surface 452B and the emission surface 452C is generated. Accordingly, it is desirable to provide the step portion 451 not only between the exit surface 452A and the exit surface 452B as an inclined surface but also between the exit surface 452B and the exit surface 452C. The step portion 451 between the emission surface 452B and the emission surface 452C can prevent light from concentrating between the emission surface 452B and the emission surface 452C, and thus uneven illuminance can be prevented.
- the step portion 451 between the emission surfaces 452B and 452C is not necessarily provided, and is appropriately provided according to the inclination angle of the emission surfaces 452B and 452C. If unnecessary, it is continuous with the emission surface 452B. Thus, the emission surface 452C may be formed.
- the outermost part 453 of the optical control member 450 is bent toward the mounting surface 5 so as to avoid contact with the globe 4.
- the incident surface 453A and the emission surface 453B are inclined surfaces that are inclined in a direction in which incident light is distributed toward the inside of the instrument.
- the incident surface 453A of the optical control member 450 is provided with a plurality (three in the present embodiment) of fixing portions 454A to 454C for being fixed to the lens cover 40 at a distance.
- a fixing portion 454A is provided at a position corresponding to the central screw hole 43 of the lens cover 40, and fixing portions 454B and 454C are provided on the side portions located on the front side or the rear side of the instrument, respectively.
- screw holes are formed in the LED substrate 13 and the lens cover 40 at positions corresponding to the fixing portions 454B and 454C.
- the LED substrate 13, the lens cover 40, and the optical control member 450 are fastened and fixed to the mounting surface 5 by the screws 15. This prevents misalignment of the lenses 41, the LED 11 of the LED board 13, and the exit surfaces 452A to 452C of the optical control member 450.
- a positioning guide 455 for positioning the optical control member 450 is provided on the incident surface 453A of the optical control member 450.
- the positioning guide 455 is inserted into the exposure opening 47 and the side surface of the positioning guide 455 contacts the edge of the positioning guide 455.
- the positioning guide 455 is formed in a substantially arc shape.
- the optical control member 450 is configured to be fixed to the lens cover 40 configured to be rotationally symmetric, the optical control member 450 can be disposed to be rotationally symmetric with respect to the mounting surface 5.
- the optical control member 450 can be made common with respect to the two attachment surfaces 5, a kind of parts can be reduced and a manufacturing process can be simplified.
- FIG. 25A and 25B are ray diagrams.
- FIG. 25A shows a case where the optical control member 450 is not provided
- FIG. 25B shows a case where the optical control member 450 is provided.
- the optical control member 450 is not provided, as shown in FIG. 25 (A)
- the light J1 directed from the LED 11 toward the outside of the instrument is emitted upward or far away.
- the light J2 that is directed to the inside of the instrument rather than the light J1 is radiated relatively near.
- the optical control member 450 is provided, as shown in FIG. 25 (B)
- the light J1 and the light J2 that are directed from the LED 11 toward the outside of the instrument are refracted toward the vicinity and become the light J1 ′ and the light J2 ′. Radiated.
- FIG. 25B light in the case where the optical control member 450 is not provided is indicated by a two-dot chain line.
- the optical control member 450 that distributes the light distributed through the lens cover 40 to the vicinity of the instrument is provided, it is possible to suppress the emission of light upward or far away. .
- the optical control member 450 since the optical control member 450 has a plurality of emission surfaces 452A to 452C having different angles, the thickness of the optical control member 450 can be reduced.
- the plurality of exit surfaces 452A to 452C can improve the degree of freedom of light distribution control.
- the exit surface 452C that suppresses total reflection can be formed.
- the optical control member 450 since the optical control member 450 is configured to be disposed rotationally symmetrically, the optical control member 450 can be made common to the two mounting surfaces 5, so that the number of parts can be reduced and the manufacturing can be performed. The process can be simplified.
- the optical control member 450 is provided for each of the attachment surfaces 5, but one optical control member 450 may be provided for the two attachment surfaces 5. Further, although one optical control member 450 is provided for a plurality of rows of LEDs, if the distance between the LED 11 and the optical control member 450 is long, the optical control member 450 is separated into each of the plurality of rows of LEDs 11. It may be provided. In the present embodiment, the light is distributed near the instrument by the optical control member 450. However, depending on the purpose of use, the light may be distributed far away from the instrument by reversing the inclination of the exit surface.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
Abstract
Description
本発明は、上述した事情に鑑みてなされたものであり、放熱性を向上させることが可能な照明器具を提供することを目的とする。
なお、この明細書には、2013年12月18日に出願された日本国特許出願・特願2013-261753号及び日本国特許出願・特願2013-261827号並びに2014年12月10日に出願された日本国特許出願・特願2014-249872号の全ての内容が含まれるものとする。
<第1実施形態>
図1は、第1実施形態にかかる防犯灯1を示す斜視図であり、図2は防犯灯1を後方から示す斜視図である。図3は、防犯灯1を示す図であり、図3(A)は平面図、図3(B)は側面図、図3(C)は底面図、図3(D)は正面図、図3(E)は背面図である。図4は図3のA-A断面図であり、図5は図3のB-B断面図である。図6は、光源部6を分解した防犯灯1の分解斜視図である。
出願人は、種々の実験を通して、人が認識する、発光部の輝きを均一化するほど、グレアを軽減できる、という知見を得た。また、出願人は、発光部の中央部を発光部の縁部よりも暗くすると、発光部の見えがかり上の輝度分布が均一になり、グレアを軽減できる、という知見を得た。さらに、出願人は、発光素子の光が独立して見えると、グレアを軽減できる、という知見を得た。
防犯灯1は、このような知見に基づいて、グレアを軽減する構成となっている。
防犯灯1は、防犯を目的として街路を既定の明るさで照明するものであり、図1~図3に示すように、路面に延出して設置される器具本体2を備えている。本実施形態の器具本体2は、路面側の先端2Aから後端2Bに延びた底面視略矩形の薄板状に形成されている。後端2Bには、例えば電柱P等に固定された締結具Qに器具本体2を固定するための固定金具3が設けられている。
器具本体2は、屋外使用に十分に耐え得る耐食性があり、なおかつ、熱伝導性が高い材料(例えばアルミニウムやアルミニウム合金)を用いて形成されている。高熱伝導性の材料を用いることで、LEDモジュール10の発熱が器具本体2から放熱され、LEDモジュール10の光源温度が発光動作に適切な温度に維持される。
グローブ4は、光透過性及び拡散性を有する材料(例えば、樹脂)で形成され、このグローブ4によってLED11の光が拡散されて、グレアが軽減されるようになっている。このグローブ4は、取付面5を下側から覆うように、直下方向に膨出して形成されており、グローブ4の下部は平坦に形成された平坦部4Aとなっている。グローブ4の下部を平坦部4Aにすることで、グローブ4の下方への膨出を軽減して、防犯灯1の高さを抑えることができる。
電源収容部20は、図7に示すように、器具本体2の先端2Aから後端2Bに亘って延在し、後端2Bを収容部開口21として開放する箱状(本実施形態では、角筒状)に形成されている。この電源収容部20の上面20Aは、後端2Bから先端2Aに掛けて高さが小さくなるように、傾斜して設けられている。本実施形態では、器具本体2は鋳造(より、詳細にはアルミダイキャスト)で成型されており、電源収容部20の上面20Aを傾斜させることにより、器具本体2を成型する際に、金型を抜きやすくなるので、器具本体2を容易に形成できる。
なお、本実施形態では、照度センサ7Dを電源収容部20の上面20Aに設けることで、光源部6からの光が照度センサ7Dの検出に影響を与えないようにしていたが、照度センサ7Dの位置はこれに限定されるものではない。照度センサ7Dは、光源部6からの光が照度センサ7Dの検出に影響を与えない位置であれば、例えば、器具本体2の側面等に設けてもよい。
図8は、グローブ4及びLEDモジュール10を取り外した器具本体2を示す図であり、図8(A)は平面図、図8(B)は側面図、図8(C)は底面図、図8(D)は正面図、図8(E)は背面図である。
取付面5は、前掲図5に示すように、電源収容部20の外周、より詳細には、底面20B及び両側面20C,20Dを囲むように、電源収容部20と一体に形成されている。このように、電源収容部20と取付面5とを熱伝導性材料で一体に形成して器具本体2を構成したため、LEDモジュール10の熱を、電源収容部20を含む器具本体2全体から放熱できるので、防犯灯1の放熱性を向上させることができる。また、電源収容部20と取付面5とを一体に形成して電源収容部20を筐体として用いているため、LEDモジュール10を取り付ける取付金具を必要としないので、防犯灯1を小型化できる。しかも、防犯灯1は、電源収容部20に一体に形成した取付面5をグローブ4で覆っただけの構成であるため、簡略的な構造にできる。
本実施形態では、取付面5の水平面Hからの取付角度θを20°以上、40°以下としている。取付角度θを20°以上にすることで、LEDモジュール10を遠方に向けて配置できるので、遠方を照射できる。また、取付角度θを40°以下にすることで、防犯灯1に不要とされる、上方に向かう上方光束を抑制できる。
2つの取付面は、水平面Hに対し斜めに設けられて谷状に配置され、本実施形態では、2つの取付面5が、下端5Bで連結されて正面視において略V字状に配置されている。2つの取付面5の間の谷部33に、電源収容部20の底面20Bが取付面5の上端5Aよりも低くなるように、電源収容部20が配置されている。このように、2つの取付面5を谷状に配置し、この谷部33に電源収容部20を配置することにより、取付面5の上方に電源収容部20を配置する場合に比べ、器具本体2の高さを抑えることができる。また、取付面5の後方に電源収容部20を配置する場合に比べ、器具本体2の前後方向の長さを抑えることができる。
なお、本実施形態では、電源収容部20の先端20Eが取付面5の先端5Cと同一面上にあるが、電源収容部20の先端20Eは、取付面5の先端5Cと前後方向に一致していなくてもよい。
そこで、本実施形態では、取付面5の外縁部34に、複数の溝35を形成している。これらの溝35は、取付面5の上端5Aから所定の幅に亘って設けられ、複数のLED11の間に配置されている。この溝35により、外縁部34の肉厚を低減させることができるので、器具本体2にひけが生じることを防止できる。また、溝35を形成することにより、器具本体2の空気に接触する面積が大きくなるので、器具本体2の放熱性を向上させることができる。
また、後端5Dは、電源収容部20の後端2Bよりも先端側に位置しているが、後端2Bと一致していてもよい。
このように構成された2つの取付面5には、それぞれLEDモジュール10が配置されている。
図9は光源部6を示す斜視図であり、図10はLEDモジュール10を示す分解斜視図である。図11は、レンズカバー40をLED11とともに示す図であり、図11(A)は平面図、図11(B)は正面図、図11(C)は側面図、図11(D)は底面図である。図12は図11のレンズカバー40を示す断面図であり、図12(A)はC-C断面図、図12(B)はD-D断面図、図12(C)はE-E断面図である。図13は、図12のF-F断面図である。なお、図9では、説明のために、2つのLEDモジュール10を同一平面上に配置している。
本実施形態では、LED11は、左右方向に多列(図示例では、3列)に配置されるとともに、配列方向に位置をずらして千鳥状に配置されている。より詳細には、両外側の列の外側LED11Aは前後の位置が同一となるように配置され、内側の列の内側LED11Bは両外側の列の外側LED11Aと左右方向で重ならないように配置されている。このように、LED11を多列、かつ、千鳥状に配置したため、LED11同士の光の干渉を防止でき、照度ムラを防止できる。さらに、レンズカバー40を例えば樹脂等の材料によって射出成型する場合に、レンズ41が千鳥状に配置することで、材料がレンズ41の部分に流れやすくなり、レンズカバー40を容易に形成できる。
ここで、高効率でないLEDを低効率LED11Dとする。本実施形態では、内側の列において、高効率LED11C間に低効率LED(低効率発光素子)11Dを配置している。
具体的には、レンズ41は、図13に示すように、レンズ内面に凸状(すなわち底面視で凹状)に湾曲する入射面45を有し、この入射面45に対してレンズ外面に凸形状の出射面46を有する。この入射面45によってレンズ41の裏面に凹部が形成され、この凹部にはLED11が入り込む。
低効率LED11Dに対応するレンズ41Bは、高効率LED11Cに対応するレンズ41Aよりも遠方に光を照射するように構成されている。
露出開口47は、LED基板13の縁13Aに近い側に配置されている。これにより、LEDモジュール10の外側が明るくなるので、LEDモジュール10の見えがかり上の輝度分布が均一になり、グレアを軽減できる。また、LEDモジュール10の略中央部が縁部よりも暗くなるので、グレアゾーンφにおけるLEDモジュール10の見えがかり上の輝度分布が均一と感じられる面積が増え、グレアを低く感じられる。さらに、レンズカバー40を例えば樹脂等の材料によって射出成型する場合に、LED基板13の縁13Aに近い側に露出開口47を設けることで、材料がレンズ41の部分に流れやすくなり、レンズカバー40を容易に形成できる。本実施形態では、内側の列において、LED基板13の縁13Aに近い内側LED11Bに高効率LED11Cを用いており、露出開口47は、その高効率の内側LED11Bの位置に設けられている。
このようにLEDモジュール10を回転対称に構成したため、2つの取付面5に対してLEDモジュール10を共通化できるので、部品種類を削減し、製造工程を簡素化できる。また、LEDモジュール10を片側配光に構成し、LEDモジュール10を背中合わせに設けた2つの取付面5に回転対称に配置することで、路面の交通方向の両方向のそれぞれの遠方まで照射できるので、比較的広範囲に照射できる。
以上のように構成された防犯灯1は、グレアを軽減しつつ、防犯灯推奨基準「クラスB」(公益社団法人 日本防犯設備協会 技術標準SES E1901-3)を、防犯灯1の設置間隔38mで達成できる。すなわち、防犯灯1は、図14に示すように、5メートル幅の街路の路面Rから高さTが4.5メートルの位置に配置され、1つのLEDモジュール10により、直下から路面Rの交通方向Sの一方向に沿って19m先に亘る路面全体のエリアを照射できる。
また、防犯灯1は、グレアゾーンφにおいて、眼前照度が8lx以下、等価光幕輝度が0.2cd/m2以下、灯具の最大輝度が170,000cd/m2以下、灯具の平均輝度が53,000cd/m2以下となるので、上述したように、グレアを低減できる。
例えば、上述の実施形態では、グローブ4全体を拡散性を有する材料で形成したが、これに限定されるものではない。
グローブ4は、LED11に近接する縁部4C(図6)において、拡散によって上方光束を比較的多く生じさせてしまう。そこで、例えば、図15及び図16に示すグローブ104のように、拡散によって水平より上方に光束を比較的多く生じさせる上方光束拡散部分(部分)104Cの拡散性を他の部分よりも低くしてもよい。これにより、防犯灯1に不要とされる、上方に向かう上方光束を抑制できる。
図16の例では、上方光束拡散部分104Cは、グローブ104に最も近接するレンズ41よりも上方に位置する縁104Dまでの部分としているが、グレアゾーンφの上方であれば、上方光束拡散部分104Cの範囲はこれに限定されるものではない。例えば、グローブ104に最も近接するレンズ41よりも上方全体を上方光束拡散部分104Cとする必要はなく、上方光束拡散部分104Cは、縁104Dを含まないグローブ104の縁部(一部)としてもよい。
ところで、使用環境によっては、光を上方又は遠方に放射することが制限される場合がある。そこで、第2実施形態の防犯灯400では、光の上方への放射を抑制する光学制御部材450を設けている。
光学制御部材450は、図21及び図22に示すように、交通方向の2方向のそれぞれに設けられ、具体的には、レンズカバー40とグローブ4との間に配置されている。この光学制御部材450は、少なくとも、レンズカバー40から上方又は遠方に向かう光が通る部分に設けられる。本実施形態では、図22に示すように、複数列(3列)のうち最外列のLED11に対向するLED11から最外(最上方)に向かう光Mが通る箇所から、最内列のLED11の光軸Kまでの間に設けられている。
なお、以下の説明では、正面視において、外側(取付面5の上端5A側)を器具外側、内側(取付面5の下端5B側)を器具内側と言う。
ここで、器具外側の2列のLED11には3つの出射面452A~452Cが形成されるが、光学制御部材450は最内列のLED11の光軸Kまでしか設けられていないため、最内列LED11には1つの出射面452Aのみ設けられている。
出射面452Bは器具内側に向けて放射するので、出射面452Bと出射面452Cとのつなぎ目に光が集中する部分が生じてしまう。したがって、傾斜面としての出射面452Aと出射面452Bとの間だけでなく、出射面452Bと出射面452Cとの間にも段部451を設けるのが望ましい。出射面452Bと出射面452Cとの間の段部451により、出射面452Bと出射面452Cとの間に光が集中することを防止でき、ひいては、照度むらを防止できる。なお、出射面452Bと出射面452Cとの間の段部451は必ずしも必要なものではなく、出射面452B,452Cの傾斜角度に応じて適宜設けられ、不要な場合には、出射面452Bに連続して出射面452Cを形成してもよい。
このように、光学制御部材450は、回転対称に構成したレンズカバー40に固定可能に構成したため、取付面5に対して回転対称に配置可能である。これにより、2つの取付面5に対して光学制御部材450を共通化できるので、部品種類を削減し、製造工程を簡素化できる。
光学制御部材450を設けない場合、図25(A)に示すように、LED11から器具外側に向かう光J1が上方や遠方に放射されている。光J1よりも器具内側に向かう光J2は比較的近傍に放射されている。
これに対し、光学制御部材450を設けた場合、図25(B)に示すように、LED11から器具外側に向かう光J1及び光J2が近傍に向けて屈折されて光J1’及び光J2’として放射されている。なお、図25(B)には、光学制御部材450を設けない場合の光を二点鎖線で示す。
また、本実施形態では、光学制御部材450によって器具近傍に配光したが、使用目的によっては、出射面の傾斜の向きを逆にして、器具遠方に配光してもよい。
2,202 器具本体
4,104 グローブ
5 取付面
7 電源部(電源)
11 LED(発光素子)
13,113,313 LED基板
20 電源収容部
20B 底面(外周)
20C,20D 側面(外周)
20E 先端
28 配線引出孔
33 谷部
40 レンズカバー
41 レンズ
104C 上方光束拡散部分(部分)
450 光学制御部材
452A,452B 出射面(傾斜面)
Claims (11)
- 電源を収める箱状の電源収容部と、発光素子を取り付ける取付面とを熱伝導性材料で一体に形成した器具本体と、前記取付面を覆うグローブとを備え、
前記取付面を、前記電源収容部の外周を囲むように設けたことを特徴とする照明器具。 - 前記電源収容部の先端に前記電源の配線を引き出す配線引出孔を形成し、前記電源収容部の先端で結線したことを特徴とする請求項1に記載の照明器具。
- 前記器具本体は傾斜する2つの取付面を谷状に有し、谷部に前記電源収容部が配置されていることを特徴とする請求項1又は2に記載の照明器具。
- 複数の前記発光素子を、当該複数の発光素子の光が独立して見えるように配置したことを特徴とする請求項1乃至3のいずれかに記載の照明器具。
- 前記取付面の水平面からの取付角度を20°以上、40°以下としたことを特徴とする請求項1乃至4のいずれかに記載の照明器具。
- 前記発光素子ごとにレンズを有し、前記発光素子の基板を覆うレンズカバーを備え、
前記レンズは、前記発光素子の光を遠方に配光することを特徴とする請求項1乃至5のいずれかに記載の照明器具。 - 前記レンズカバーを回転対称に構成し、
2つの前記取付面に回転対称に配置したことを特徴とする請求項1乃至6のいずれかに記載の照明器具。 - 前記取付面を覆う、拡散性を有するグローブを備え、
前記グローブの拡散によって水平より上方に光束を生じさせる部分のうち一部の拡散性を他の部分よりも低くしたことを特徴とする請求項1乃至7のいずれかに記載の照明器具。 - 前記レンズを介して配光した光を、器具近傍又は器具遠方に配光する光学制御部材を設けたことを特徴とする請求項6乃至8のいずれかに記載の照明器具。
- 前記光学制御部材は、角度の異なる複数の傾斜面を有することを特徴とする請求項9に記載の照明器具。
- 前記光学制御部材は回転対称に配置可能に構成されたことを特徴とする請求項9又は10に記載の照明器具。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2014367936A AU2014367936B2 (en) | 2013-12-18 | 2014-12-11 | Illumination device |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2013-261827 | 2013-12-18 | ||
JP2013-261753 | 2013-12-18 | ||
JP2013261827A JP5772936B2 (ja) | 2013-12-18 | 2013-12-18 | 道路灯 |
JP2013261753 | 2013-12-18 | ||
JP2014-249872 | 2014-12-10 | ||
JP2014249872A JP5854117B2 (ja) | 2013-12-18 | 2014-12-10 | 照明器具 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2015093392A1 true WO2015093392A1 (ja) | 2015-06-25 |
Family
ID=53402739
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2014/082857 WO2015093392A1 (ja) | 2013-12-18 | 2014-12-11 | 照明器具 |
Country Status (1)
Country | Link |
---|---|
WO (1) | WO2015093392A1 (ja) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010118223A (ja) * | 2008-11-12 | 2010-05-27 | Toshiba Lighting & Technology Corp | 照明器具 |
JP2011187189A (ja) * | 2010-03-05 | 2011-09-22 | Sharp Corp | 照明装置 |
JP2012123982A (ja) * | 2010-12-07 | 2012-06-28 | Mitsubishi Electric Corp | 照明装置 |
JP2012190717A (ja) * | 2011-03-11 | 2012-10-04 | Toshiba Lighting & Technology Corp | 電源装置及び照明装置 |
-
2014
- 2014-12-11 WO PCT/JP2014/082857 patent/WO2015093392A1/ja active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010118223A (ja) * | 2008-11-12 | 2010-05-27 | Toshiba Lighting & Technology Corp | 照明器具 |
JP2011187189A (ja) * | 2010-03-05 | 2011-09-22 | Sharp Corp | 照明装置 |
JP2012123982A (ja) * | 2010-12-07 | 2012-06-28 | Mitsubishi Electric Corp | 照明装置 |
JP2012190717A (ja) * | 2011-03-11 | 2012-10-04 | Toshiba Lighting & Technology Corp | 電源装置及び照明装置 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US9212812B2 (en) | LED light fixture with integrated light shielding | |
US20140211470A1 (en) | LED Lighting Fixture | |
JP5594600B2 (ja) | 照明器具 | |
JP5854117B2 (ja) | 照明器具 | |
JP2009104913A (ja) | 照明器具および非常灯 | |
JP2014072106A (ja) | 照明器具 | |
JP5019042B2 (ja) | 照明装置および照明器具 | |
JP5918835B2 (ja) | 照明装置 | |
KR20160118777A (ko) | 조명장치 | |
JP6248988B2 (ja) | 発光素子モジュール及び照明器具 | |
JP5772936B2 (ja) | 道路灯 | |
JP6186714B2 (ja) | 照明器具 | |
JP6111633B2 (ja) | 照明器具 | |
JP5955047B2 (ja) | 照明器具 | |
WO2015093392A1 (ja) | 照明器具 | |
JP6795831B2 (ja) | 照明器具 | |
JP5559649B2 (ja) | 照明装置 | |
JP5776757B2 (ja) | 発光素子モジュール及び照明器具 | |
JP6251081B2 (ja) | 反射ユニット、及びledモジュール | |
JP6277604B2 (ja) | 照明器具 | |
KR20170121348A (ko) | 천정 취부형 조명 장치 | |
JP6260119B2 (ja) | 光学レンズ装置 | |
AU2014367936B2 (en) | Illumination device | |
EP3225904B1 (en) | Lighting module and lighting fixture | |
JP2010192338A (ja) | ランプ装置および照明器具 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 14871261 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 2014367936 Country of ref document: AU Date of ref document: 20141211 Kind code of ref document: A |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 14871261 Country of ref document: EP Kind code of ref document: A1 |