JP2010146902A - Lighting system - Google Patents

Abstract

Provided is a lighting device capable of preventing or suppressing a high temperature of a light emitting diode.
A pair of light emitting units (15a, 15b) in which heat sinks (16a, 16b) are disposed on the back side of the light emitting diode (16e); a lighting circuit unit (18) in which a lighting circuit board (18c) of the light emitting diode (16e) is housed in a housing box (18a); A plurality of light projecting openings are provided at predetermined intervals. Light emitting units are respectively disposed in the light projecting openings, and a lighting circuit unit 18 is provided between the light emitting units 15a and 15b. A lamp body 2 having a main body 8 disposed therein.
[Selection] Figure 1

Description

  The present invention relates to a lighting device using an LED (light emitting diode) as a light source.

  Conventionally, as an example of this type of lighting device, there is an air traffic light such as a runway warning light installed at an airport runway or an entrance / exit of the taxiway.

In such a conventional LED runway warning light, a light-emitting unit including a light-emitting diode and a lighting circuit for the light-emitting diode are simply housed in a lamp formed in one sealed space without being shielded from heat. Is known (see, for example, Patent Documents 1 and 2).
JP 2001-39393 A JP 2000-348501 A

  However, in such a conventional runway warning light, since the light emitting diode and its lighting circuit are simply housed in the lamp body forming one sealed space without being shielded from heat, the light emitting diode is protected from the heat generated by the lighting circuit. The light emitting diode is likely to be deteriorated due to high temperature, and the light emission efficiency is likely to be lowered. For this reason, the luminous intensity fall by the temperature drift after lighting is a big subject.

  In the runway warning light described in Patent Document 1, the air in the lamp body forming the sealed space is simply stirred by a fan to cool the light emitting diodes and lighting circuits in the main body. In order to improve the cooling effect, it is necessary to increase the space in the lamp body. For this reason, there is a problem that the main body is increased in size.

  Further, when the lamp body is increased in size, dew condensation is likely to occur when the outside air temperature is lowered, and when the dew condensation occurs in front of the light source, there is a problem that the luminous intensity is decreased.

  An object of this invention is to provide the illuminating device which can prevent or suppress the high temperature of a light emitting diode.

  The lighting device according to claim 1 includes a plurality of light emitting units provided with a heat sink on the back side of the light emitting diode; a lighting circuit unit in which a lighting circuit of the light emitting diode is housed in a container; and a plurality of light emitting units at a predetermined interval. And a lamp body having a main body in which a light emitting unit is disposed in each of the plurality of light projecting openings and a lighting circuit unit is disposed between the light emitting units. It is characterized by that.

  In the present invention, the light emitting diode of each light emitting unit may be singular or plural, and the color of the emitted light may be any. Further, “disposing the heat sink on the back surface of the light emitting diode” means, for example, a case where the back surface of the light emitting diode is directly or indirectly attached to the base of the heat sink having the heat radiating fins. Since the heat sink is disposed on the back surface of the light emitting diode, the heat generated by the light emitting diode can be dissipated by the heat sink and cooled.

  Further, it is preferable that the lighting circuit unit is attached to the inner surface of the bottom of the bottomed cylindrical container having one end opened, for example, and the opening end of the container is attached to the main body of the lamp body. Since the lighting circuit board is accommodated in the container, the heat generation of the lighting circuit can be shielded by the container. For this reason, the thermal influence given to the light emitting diode of the light emitting unit can be reduced.

  The lighting device according to claim 2 is characterized in that a light-transmitting member, a light-emitting unit, and a lighting circuit unit, which are attached so as to cover the projection opening, are attached to the lamp body through waterproof means. And

  In the present invention, the “waterproofing means” is a curable filling material such as packing made of an elastic material or silicone resin.

  The illumination device according to claim 3 is characterized in that a protective cover is disposed with a predetermined gap on the back side of the heat sink.

  In the present invention, since there is a gap between the back surface side of the heat sink and the protective cover, the heat dissipation performance of the heat sink can be improved by ventilation of the gap.

  The protective cover is for protecting the heat sink from the outside. Moreover, the member which can prevent or suppress that the heat from the outside, such as solar heat, is directly radiated and transferred to the heat sink to form a shade on the heat sink. What is necessary is just to have the material and shape according to the protection objective.

  According to the illumination device of the first aspect, since the heat generated by the light emitting diode is radiated by the heat sink, the heat radiation effect can be improved. Further, the heat generated in the lighting circuit can be shielded by the container. For this reason, since the thermal influence which the heat_generation | fever of a lighting circuit has on a light emitting diode can be reduced, the high temperature of a light emitting diode can be prevented or suppressed. As a result, it is possible to prevent or suppress the increase in size of the lamp body and the occurrence of condensation due to the increase in size.

  According to the illuminating device of claim 2, since the translucent member that covers the light projecting opening, the light emitting unit, and the lighting circuit unit are attached to the main body of the lamp body through the waterproof means, The waterproofness of the lamp can be improved. For this reason, the lighting device can be installed outdoors.

  According to the illumination device of the third aspect, since the heat sink is protected from the outside, the heat dissipation effect can be maintained.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In addition, the same code | symbol is attached | subjected to the same or an equivalent part in these several accompanying drawings.

  1 is an exploded perspective view of a light emitting diode signal lamp according to an embodiment of the present invention, FIG. 2 is a perspective view of the light emitting diode signal lamp shown in FIG. 1, FIG. 3 is a side view of FIG. 2, and FIG. FIG. 5 is a plan view of FIG. 2.

  As shown in FIGS. 2 and 3, the light-emitting diode signal lamp 1 is configured, for example, in a luminous intensity 3000 CD type, and left and right side surfaces of a horizontally long rectangular tubular lamp body 2 made of aluminum or the like are formed in a U-shaped strip shape. The support frame 3 is swingably supported, and the upper end of the pole 4 in the figure is fixed to the center of the bottom of the support frame 3.

  The entire pole 4 is formed of, for example, a substantially cylindrical cylinder made of aluminum, and is provided with a foldable joint 4a. The foldable joint 4a is attached to the center of the bottom of the support frame 3 by a mounting bracket (not shown) provided at the upper end in the drawing. A power cord (not shown) is introduced from the outside into the foldable joint 4a, and the power cord is electrically connected to a light emitting diode described later. The foldable joint 4a is attached to a support member (not shown) installed at a predetermined position such as near the intersection of the airport runway and taxiway, and the vertical direction and the horizontal direction with respect to the direction of gravity acting on the support member. Can be rotated. Thereby, the lamp body 2 is rotated in the vertical direction and the horizontal direction with respect to the direction of gravity.

  The support frame 3 has a pair of left and right U-shaped openings on the left and right side surfaces of the lamp body 2 in a state where the lower half of the rectangular tube lamp body 2 is accommodated in the U-shaped opening. A pair of hinge pins 5a and 5b provided at the ends are attached, and the lamp body 2 is supported so as to be swingable in the front-rear direction in FIG. In addition, the support frame 3 is provided with a pair of left and right tightening bolts 6a and 6b for holding the swing angle slightly below the pair of hinge pins 5a and 5b in FIG. Yes. These tightening bolts 6a and 6b are screwed to the left and right side surfaces of the lamp body 2 and are inserted through the pair of arc-shaped slits 7a and 7b of the support frame 2 outward in the vertical direction to protrude outside. By providing the outer ends with knobs 7a1, 7b1 having a diameter larger than the opening width in the vertical direction in FIG. 2 of the slits 7a, 7b, and turning these knobs 7a1, 7b1 by hand in the required direction and tightening, The swing angle of the lamp body 2 is maintained.

  As shown in FIG. 1, the lamp body 2 includes a flat bottomed rectangular tube-shaped main body 8 and a flat bottomed rectangular tube-shaped cover 9 that covers substantially the entire front plate 8 a corresponding to the bottom of the main body 8. is doing. As shown in FIG. 2, the cover 9 is swingably connected to the main body 8 by a pair of left and right hinges 10a and 10b provided at the lower end in the figure, and the cover 9 is attached to be openable and closable in the upper part in the figure. . 1 and 2 of the main body 8 and the cover 9, a ratchet mechanism (not shown) for holding the closed state in which the cover 9 covers the main body front plate 8a is provided. This ratchet mechanism has a release button (not shown) for releasing the ratchet state, and the cover 9 can be appropriately opened and closed by releasing the ratchet state by an operation such as pressing the release button.

  The cover 9 is formed with a pair of left and right circular projection openings 9b and 9c on a front plate 9a corresponding to the bottom of the flat bottomed square tube. As shown in FIG. 1, circular sponges or rubber packings P, P are attached to the outer peripheral sides of the pair of light projecting openings 9b, 9c, respectively, on the periphery of the openings. Further, on these outer left and right pair of packings P and P, circular flat lenses 11a and 11b made of, for example, a resin such as acrylic or tempered glass, which is an example of a translucent member, are fixed to the irradiation window 12a. , 12b.

  On the other hand, disc-shaped contrast plates 13a and 13b having a slightly larger diameter than those of the projection openings 9b and 9c are fixed to the inner surfaces of the pair of projection openings 9b and 9c, respectively. The contrast plates 13a and 13b respectively form portions corresponding to light emitting portions of a plurality of light emitting diodes described later in the light transmitting portion 13c, and transmit portions 13d other than the light transmitting portions 13c through the light transmitting portion 13c. It is colored in the required color such as black that can enhance the light color and contrast of light. An annular packing P is attached to the outer peripheral edge of each of the contrast plates 13a and 13b. On the other hand, as shown in FIG. 2, arc-shaped hoods 14a and 14b project from the outer surface (front surface) of the front plate 9a of the cover 9 at the upper part of the pair of left and right irradiation windows 12a and 12b, respectively. Yes. These hoods 14a and 14b prevent the direct irradiation of the left and right irradiation windows 12a and 12b from lowering the contrast and prevent rainwater from directly hitting the irradiation windows 12a and 12b.

  The flat bottomed rectangular tube-shaped main body 8 is concentrically formed on the front plate 8a corresponding to the bottom portion thereof with projection holes 8b and 8c having substantially the same shape and size corresponding to the irradiation windows 12a and 12b. Is formed. The front surfaces of the pair of left and right light emitting units 15a and 15b are brought into concentric contact with the inner surfaces of the pair of through holes 8b and 8c, and are fixed to the main body. These light emitting units 15a and 15b radiate a plurality of LEDs (light emitting diodes) 16e, 16e,... On the front surfaces of the bases 16c and 16d of the heat sinks 16a and 16b in a required light distribution pattern such as a circle or an ellipse. Are arranged in the required arrangement, and the back surfaces thereof are respectively fixed. Each LED 16e is configured, for example, by disposing a yellow light emitting LED main body on a small rectangular substrate, and concentrically disposing a lens holder formed integrally with the lens on the LED main body. . The back surfaces of these LED substrates are directly fixed to the front surfaces of flat bases 16c and 16d of the heat sinks 16a and 16b. A plurality of heat radiation fins 16f and 16g are disposed on the back surfaces of the bases 16c and 16d, respectively.

  Disc-shaped alignment plates 17a and 17b are fixed concentrically on the front surfaces of the bases 16c and 16d of the heat sinks 16a and 16b. These alignment plates 17a and 17b form, for example, a plurality of rectangular through-holes 17e, 17e, 17e,... That are respectively adapted to the planar shape and arrangement of the LEDs 16e on the substrates 17c and 17d made of transparent disks. The packings P and P are fitted and fixed to the outer peripheral edges of the transparent substrates 17c and 17d, respectively. The alignment plates 17a and 17b are inserted into the through-holes 17e, 17e, 17e,... And the front light-emitting portions such as the lenses of the respective LEDs 16e and are slightly protruded so that the packing P is in close contact with the heat sink 16a. , 16b are fixed to the bases 16c, 16d.

  As shown in FIGS. 1 and 4, the main body 8 has a lighting circuit unit 18 fixed to the inner surface of the front plate 8a between a pair of left and right light emitting units 16a and 16b. The lighting circuit unit 18 has a lighting circuit board 18c disposed in a flat bottomed rectangular tube-like storage box 18a which is an example of a container.

  That is, the housing box 18a has a rectangular frame-shaped outward flange 18b integrally projecting from the opening end thereof, and a rectangular frame-shaped packing P is fixed concentrically on the outer peripheral edge of the opening end. The housing box 18a has a lighting circuit board 18c fixed to the inner surface of the bottom. The lighting circuit board 18c forms a dimmable lighting circuit on the board for lighting the LEDs 16e of the pair of left and right light emitting units 15a and 15b with substantially the same brightness. The lighting circuit board 18c has its output side electrically connected to each LED 16e via a lead wire or harness (not shown), and its input side connected to a power line (not shown). Further, the accommodation box 18a is fixed to the opening end side in a state where the packing P is in close contact with the inner surface of the main body front plate 8a.

  As shown in FIGS. 3 to 5, a substantially rectangular flat plate-like heat shield as an example of a protective cover is provided on the back side of the pair of left and right heat sinks 16 a and 16 b so as to cover the back side with a necessary gap. The plate 19 is fixed to the main body front plate 8a by a plurality of long-axis bolts 20, 20,.

  Since the light-emitting diode signal lamp 1 is configured as described above, when necessary power is supplied from the lighting circuit unit 18 to the LEDs 16e of the pair of left and right light-emitting units 15a and 15b, the LEDs 16e are turned on, and the pair of left and right For example, visible light such as yellow light is emitted from the light emitting units 15a and 15b. The emitted light further passes through a pair of left and right contrast plates 13a and 13b and lenses 11a and 11b, and is emitted to the outside. The emitted light is dimmed by the lighting circuit unit 18.

  Since the heat sinks 16a and 16b are disposed on the back surface of the light emitting diode 16e, the heat generated by the light emitting diode 16e can be radiated and cooled by the heat sinks 16a and 16b, respectively.

  Furthermore, since the lighting circuit unit 18 is housed in, for example, a bottomed cylindrical housing box 18a that is open at one end, the housing box 18a can block heat generated by the lighting circuit board 18c. For this reason, since the thermal influence which it has on the light emitting diode 16e of the light emitting units 15a and 15b can be reduced, the high temperature of the light emitting diode 16e can be prevented or suppressed.

  Moreover, the heat shield plate 19 can prevent the heat sink from being damaged or soiled by a foreign object from the outside. Further, since the heat shield plate 19 covers the back surfaces of the heat sinks 16a and 16b with a necessary gap, direct sunlight can be prevented or suppressed from being applied to the heat sinks 16a and 16b. Furthermore, since there is a gap between the back side of the heat sinks 16a and 16b and the heat shield plate 18, the heat dissipation performance of the heat sinks 16a and 16b can be improved by ventilation of the gap. For this reason, the high temperature of the light emitting diode 16e can be further prevented or suppressed. As a result, it is possible to prevent or suppress the increase in size of the lamp body 2 and the occurrence of condensation due to the increase in size.

The disassembled perspective view of the light emitting diode signal lamp which concerns on one Embodiment of this invention. The perspective view of the light emitting diode signal lamp shown in FIG. The right view of FIG. IV-IV sectional view taken on the line of FIG. The top view of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Illuminating device, 2 ... Lamp body, 3 ... Support frame, 4 ... Pole, 4a ... Foldable joint, 5a, 5b ... A pair of hinge pins, 6a, 6b ... A pair of clamping bolt, 8 ... Main body, 8a ... Main body Front plate, 8b, 8c ... Projection opening, 9 ... Cover, 11a, 11b ... A pair of left and right lenses (translucent member), 13a, 13b ... A pair of contrast plates, 14a, 14b ... A pair of hoods, 15a, 15b: a pair of light emitting units, 16a, 16b ... a pair of heat sinks, 16c, 16d ... a pair of bases, 16e ... a light emitting diode (LED), 17a, 17b ... a pair of alignment plates, 18 ... a lighting circuit unit, 18a ... a storage box (Container), 19 ... heat shield.

Claims (3)

A plurality of light emitting units having a heat sink disposed on the back side of the light emitting diode;
A lighting circuit unit that houses a lighting circuit of a light emitting diode in a container;
A plurality of light projecting openings are provided at predetermined intervals, a light emitting unit is disposed in each of the light projecting openings, and a lighting circuit unit is disposed between the light emitting units. A lamp body having;
An illumination device comprising: The lighting device according to claim 1, wherein a translucent member, a light emitting unit, and a lighting circuit unit are attached to the lamp body through waterproof means so as to cover the light projecting opening. . The lighting device according to claim 2, wherein a protective cover is disposed on the back side of the heat sink with a predetermined gap.

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