JP2011100714A - Led lighting unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an LED lighting unit capable of achieving highly effective illumination while avoiding overheating of an LED light source which may be damaged, and exchanging the LED light source at the time of need. <P>SOLUTION: The LED lighting unit includes: a shade 26 with openings at both ends, on which a reflecting surface 25 whose inner surface is made in a shape of a parabolic mirror is formed; a light-diffusing lens 7 arranged on one opening end of the shade 26; a substrate wall 16 where an LED module 8 is arranged toward the reflecting surface 25 of the shade 26 at a central axis line of the shade 26; at least one or more of LED modules 8; and a heat radiation part 14 integrally connected with the substrate wall 16 and exposed from the other opening end of the shade 26. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an LED (Light Emitting Diode) lighting unit. Specifically, the present invention relates to a stationary illumination unit that irradiates a wide area.

As this type of LED lighting apparatus, for example, one described in Patent Document 1 is known.
Specifically, as shown in FIG. 18, the LED lighting apparatus described in Patent Document 1 is mounted on a mounting substrate 102 in a substantially bowl-shaped reflecting surface 101 and emits light toward the reflecting surface 101. An LED module 104 having a plurality of LED elements 103 is installed. Further, around the plurality of LED elements 103, there is provided a lens 105 corresponding to each LED element 103, and a substantially cylindrical lens unit 106 that slides substantially parallel to the central axis of the reflecting surface 101. Yes. And the structure which can adjust the emission direction of the light from the LED module 104 to the reflective surface 101 is realized by sliding the substantially cylindrical lens unit 106.

  In recent years, high-performance LED modules with high luminous intensity have been developed, and these high-performance LED modules ensure extremely high light efficiency by arranging LED elements in a small space or narrow area with high density. It is known to do.

JP 2004-296249 A

  However, in the luminaire described in Patent Document 1 described above, since a plurality of LED elements are installed on the mounting substrate, heat is generated along with light emission, and the space between the LED module and the reflecting surface, that is, the so-called housing. If the heat is applied to the LED element, the LED element is always overheated, which may damage the LED element.

  In addition, the mounting substrate accumulates heat due to heat generated by the light emission of the LED element, but it is possible to avoid overheating of the LED element because there is no means for conducting heat from the mounting substrate to the outside of the lighting fixture and allowing it to cool. However, there is a problem that the brightness and the life are shortened.

  In addition, when LED elements are packed in a small space or narrow area with high density in a high-performance LED module, the problem of heat removal is solved because extremely high heat is generated with light emission. There is a need to. In addition, when used for a long time, it is necessary to be able to replace the light source due to deterioration.

  The present invention was devised in view of the above points, and provides an LED illumination unit capable of realizing high-efficiency illumination while avoiding overheating from the damaging LED and capable of replacing the LED light source. It is intended to do.

  In order to achieve the above object, an LED lighting unit according to the present invention includes a shade having a double-sided opening formed with a reflecting surface whose inner surface is a parabolic mirror, and one opening end of the shade. A light diffusion lens provided; a substrate wall disposed on a substantially central axis of the shade toward the reflecting surface of the shade; at least one LED module provided on the substrate wall; And a heat dissipating part exposed integrally from the other opening end of the shade.

  Here, a shade having a double-sided opening formed with a reflecting surface whose inner surface is a parabolic mirror, a light diffusing lens provided at one opening end of the shade, and a shade on the central axis of the shade. By the substrate wall on which the LED module is arranged toward the reflecting surface and at least one LED module, the light from the LED light source passes through the reflecting surface whose inner surface is a parabolic mirror. Reflected at an angle close to parallel to the central axis, and incident on the light diffusion lens and distributed with a relatively large angle, the light emitted from the LED element can be used to the maximum. .

  Further, the heat generated by the light emission by the LED element is conducted from the substrate wall to the heat radiating portion by the heat radiating portion that is integrally provided with the substrate wall and exposed from the other opening end of the shade, and further, By conducting heat to the external metal mounting plate and dissipating heat to the outside of the shade, it is possible to prevent damage to the LED element due to overheating.

  In addition, the substrate walls are arranged parallel to each other with respect to the substantially central axis of the shade and directed toward the reflection surface of the shade, so that the light emitted to the reflection surfaces in the opposite directions is evenly applied to the reflection surface of the shade. By doing so, it becomes possible to obtain a constant high illuminance without decreasing the illuminance within a certain range under the LED lighting.

  Further, the substrate wall can be formed into a polygonal substrate wall substantially parallel to the central axis of the shade by making the cross-sectional shape orthogonal to the central axis of the shade a polygonal shape. By arranging a plurality of LED modules on the substrate wall, it is possible to realize an illumination lamp with extremely high luminance.

  In addition, the heat radiating portion is formed of a metal block extending in the radial direction from the substrate wall, and is formed to protrude outward from the other opening end of the shade, thereby accompanying light emission by the LED element. The generated heat has excellent heat conductivity and is dispersed by a metal block having a larger capacity than the substrate wall, and can be quickly dissipated from the other open end of the shade.

  In addition, the heat radiating portion is replaceably fixed to the other opening end of the shade, so that, for example, when a plurality of high-density LED modules are required, the substrate has a polygonal substrate wall. It is possible to replace it with a heat dissipation part.

  In addition, the LED module can be easily replaced at the time of replacement due to deterioration of the LED light source by being detachably fixed to the substrate wall by a removable contact pressure means.

  In addition, the heat dissipating part has a conduit drilled between the substrate wall, and the electrical conductor connected to the LED module is connected to the outside of the shade through the conduit, so that the wiring can be made without damaging the electrical conductor. It becomes possible to simplify.

  According to the LED lighting unit of the present invention, it is possible to efficiently dissipate heat generated by light emission, and prevent deterioration of the function or life of the LED element, and replacement of the heat dissipating part as necessary. It becomes possible.

It is a partial cross section schematic diagram for demonstrating an example of the street lamp which has the illumination head part in the LED lighting unit to which this invention is applied. It is a side surface schematic diagram for demonstrating an example of the LED lighting unit to which this invention is applied. It is a plane schematic diagram for demonstrating an example of the LED lighting unit to which this invention is applied. It is a cross-sectional schematic diagram in the AA line of the side surface schematic diagram for demonstrating an example of the LED lighting unit to which this invention is applied. It is a cross-sectional schematic diagram for demonstrating an example of the lens for light diffusion of the LED illumination unit to which this invention is applied. It is a three-dimensional schematic diagram for demonstrating an example of the board | substrate wall of the LED lighting unit to which this invention is applied. It is a plane schematic diagram for demonstrating an example of the board | substrate wall of the LED lighting unit to which this invention is applied. It is a front schematic diagram for demonstrating an example of the board | substrate wall of the LED lighting unit to which this invention is applied. It is a side surface schematic diagram for demonstrating an example of the board | substrate wall of the LED lighting unit to which this invention is applied. It is a side surface schematic diagram for demonstrating the other example of the board | substrate wall of the LED lighting unit to which this invention is applied. It is a three-dimensional schematic diagram for demonstrating an example of the board | substrate wall which has the three board | substrate surfaces of the LED lighting unit to which this invention is applied. It is a three-dimensional schematic diagram for demonstrating an example of the board | substrate wall which has four board | substrate surfaces of the LED lighting unit to which this invention is applied. It is a three-dimensional schematic diagram for demonstrating an example of the board | substrate wall which has the six board | substrate surfaces of the LED lighting unit to which this invention is applied. It is a front schematic diagram for demonstrating the other example of the LED lighting unit to which this invention is applied. It is a cross-sectional schematic diagram in the BB line of the front schematic diagram for demonstrating the other example of the LED lighting unit to which this invention is applied. It is a three-dimensional schematic diagram for demonstrating an example of the board | substrate wall in the other example of the LED lighting unit to which this invention is applied. It is a three-dimensional schematic diagram of the state which removed the lens for light diffusion in the other example of the LED lighting unit to which this invention is applied. It is a schematic diagram for demonstrating an example of the conventional LED lighting unit.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings to provide an understanding of the present invention.

<Example 1>
FIG. 1 is a partial schematic cross-sectional view for explaining an example of a street lamp having an illumination head portion in an LED lighting unit to which the present invention is applied, and FIG. 2 is a diagram for explaining an example of an LED lighting unit to which the present invention is applied. FIG. 3 is a schematic side view, and FIG. 3 is a schematic plan view for explaining an example of an LED lighting unit to which the present invention is applied.

  The street lamp 1 shown here has a configuration in which an illumination head unit 3 is provided on a support 2. In this illumination head unit 3, a configuration in which an illumination unit 4 including ballasts 5 and 6 for illuminating a traffic area from a height of about 5 m to 6 m, a light diffusing lens 7 and a mounting plate 21 is housed. Has been.

This illumination unit 4 has a shade 26 having an opening at both ends, on which a reflecting surface 25 having an inner side surface formed in a parabolic mirror shape is formed. An annular groove 29 is formed around one open end 37 of the shade 26, and the light diffusion lens 7 is fixed to the annular band 30 of the illumination head unit 3 by the flange ring 31 in the annular groove 29. ing.
The light diffusing lens 7 may be directly fixed to the annular band 29.

  4 and 5, a cylindrical stationary ring 24 is provided at the other opening end 38 of the shade 26, and the cylindrical projection 23 of the heat radiating portion 14 is fitted to the stationary ring 24. It has been.

  Further, a substrate wall 16 is integrally formed on the heat radiation portion 14 on the central axis 13 of the shade 26. LED modules 8 and 9 are respectively disposed on both side surfaces of the substrate wall 16.

Here, as shown in FIGS. 6, 7, 8, and 9, the heat radiating portion 14 is configured as a metal block made of one member, preferably a metal block made of aluminum.
A substrate wall 16 is integrally formed continuously on the heat radiating portion 14, and both side surfaces of the substrate wall 16 that are parallel to each other are substrate surfaces 12 and 12 </ b> A.

  Further, the heat radiating portion 14 has a cylindrical protrusion 23 protruding in the radial direction from the substrate surfaces 12 and 12A, and a transition from each substrate surface 12 and 12A to the upper surface 27 of the protrusion 23. The part is formed in a curved shape in order to allow better heat conduction.

  Furthermore, the protrusion 23 has a flat circular stand surface 20 on the lower surface thereof. With this stand surface 20, the heat radiating portion 14 is attached with screws or the like so that the bottom surface of the stand surface 20 contacts the metal mounting plate 21 inside the illumination head portion 3 shown in FIG. The LED light source can be separated from the main body.

  By adopting such a configuration, heat transferred to the heat radiating portion 14 is conducted from the stand surface 20 to the metal mounting plate 21 so that quick heat dissipation can be realized.

  In addition, in order to improve the heat conductivity to the illumination head part 3 provided with the metal housing, you may form a heat conductive layer also in the stand surface 20. FIG.

Furthermore, LED modules 8 and 9 including a diode substrate 10 having a plurality of LED elements 11 are arranged on the substrate surfaces 12 and 12A.
The diode substrates 10 of these LED modules 8 and 9 are fixed to the substrate surfaces 12 and 12A with a constant contact pressure.

  Specifically, screws 15 are provided on the substrate surfaces 12 and 12A. The screws 15 are arranged at two opposite corners of the diode substrate 10 having a substantially square shape, and are screwed into the substrate wall 16.

  Further, in order to ensure a good thermal conductivity connection between the diode substrate 10 and the substrate wall 16, there is no gap between the diode substrate 10 and the substrate surface 12 or between the diode substrate 10 and the substrate surface 12A. A paste-like heat conductive layer 17 is disposed.

  Also, at least two conduits 32, 32A that are perforated at an angle to allow the necessary heat conducting wires (not shown) from the LED modules 8, 9 to penetrate the heat radiating portion 14 in the heat radiating portion 14. Is provided.

  The conduits 32 and 32A are configured to connect the side surface of the lower cylindrical surface of the stand surface 20 and the upper surface 27 below the substrate surfaces 12 and 12A.

  Next, FIG. 10 shows another example of the substrate wall 16 in FIG. 9, and the substrate surfaces 12 and 12A facing each other on the substrate wall 16 do not extend parallel to each other and are parallel to the symmetry plane. In both cases, a tip angle α is formed.

  The tip angle α is in the range of about 5 ° to 10 °. By using such an orientation of the substrate surfaces 12 and 12A together with a parabolic mirror adjusted to this orientation, light can be irradiated onto the irradiated surface.

FIG. 11 is a schematic diagram for explaining an example of a substrate wall having three substrate surfaces.
The substrate wall 16A is formed by a triangular prism substrate block 33. Needless to say, an LED module (not shown) provided with a reflector (not shown) and a diode substrate is attached to the three substrate surfaces 12, 12A, 12B of the substrate block 33, respectively. .

Next, FIG. 12 is a schematic diagram for explaining an example of a substrate wall having four substrate surfaces.
The substrate wall 16B has four substrate surfaces 12, 12A, 12B, and 12C formed in a cubic substrate block 33A having a square cross section. Of course, a LED plate (not shown) having a reflector (not shown) and a diode substrate is attached to each of the four substrate surfaces 12, 12A, 12B and 12C of the substrate block 33A. It is.

FIG. 13 is a schematic diagram for explaining an example of a substrate wall having six substrate surfaces.
The substrate wall 16C has six substrate surfaces 12, 12A, 12B, 12C, 12D, and 12E formed on a hexagonal substrate block 33B having a hexagonal cross section. On the six substrate surfaces 12, 12A, 12B, 12C, 12D, and 12E of the substrate block 33B, an LED module (not shown) including a reflector (not shown) and a diode substrate is attached. Of course.

  The light diffusing lens described in detail in the present embodiment diffuses or polarizes the light emitted through the light diffusing lens according to the installation status of the LED illumination lamp. A lens or a lens such as a Fresnel lens is used.

  In the LED illumination unit of the present invention having the above-described configuration, the light emitted from the LED modules 8 and 9 disposed on the respective substrate surfaces 12 toward the reflection surface 25 of the shade 26 has a parabolic mirror shape. Reflecting and diffusing the reflecting surface 25 so as to be substantially parallel to the central axis of the shade 26, a predetermined range can be irradiated through the light diffusing lens 7.

  In this way, when the LED modules 8 and 9 are arranged in tandem on the substrate surface 12 in the direction of the central axis of the shade 26, the LED modules 8 and 9 are reflected on the reflection surface 25 of the shade 26 and emitted to the light diffusion lens 7 of the shade 26. In this way, efficient lighting is possible.

  Further, the heat generated from the LED elements 11 provided in the respective LED modules 8 and 9 is quickly dissipated by the heat radiating portion 14 made of a metal block, so that the LED elements are densely packed in a small space or narrow area. Even in this case, it is possible to maintain high-luminance illumination without degrading the characteristics.

<Example 2>
FIG. 14 is a schematic plan view for explaining another example of the LED lighting unit to which the present invention is applied, and FIG. 15 is a schematic cross-sectional view for explaining the internal structure of FIG. 14B-B.

  The illumination unit 4 </ b> A shown here has a shade 26 </ b> A having an opening at both ends on which an inner surface has a reflecting surface 25 </ b> A having a parabolic mirror shape. One open end 37 of the shade 26A is formed in a vertically long oval shape, and an annular groove 29 is provided around the opening edge, and the light diffusion lens 7 is fitted in the annular groove 29. ing.

  Further, an elliptical fixed ring 24 is provided at the other opening end 38 of the shade 26A, and the elliptical protrusion 23 of the heat radiating portion 14A is fitted into the fixed ring 24.

  Further, a substrate wall 16 is integrally formed continuously on the central axis 13 of the shade 26A in the heat radiating portion 14A, and both side surfaces of the substrate wall 16 which are parallel to each other are used as substrate surfaces 12 and 12A. Yes. Further, LED modules 8 and 9 are arranged on the substrate surfaces 12 and 12A, respectively.

  Here, as shown in FIGS. 16 and 17, the heat radiating portion 14 </ b> A has substrate surfaces 12 and 12 </ b> A formed on both side surfaces of the substrate wall 16 which are parallel to each other. Furthermore, the lower part of the substrate wall 16 has an elliptical protrusion 23 that protrudes in the radial direction from the substrate wall 16, and a transition from each substrate surface 12, 12 A to the upper surface 27 of the protrusion 23. The part is formed in a curved shape in order to allow better heat conduction.

  Next, a plurality of LED modules 8 or LED modules 9 composed of a plurality of LED elements 11 are arranged on the two substrate surfaces 12 and 12A facing each other of the heat radiating portion 14A.

  In addition, a conduit 32 </ b> A for guiding the electrical conductor 34 to each LED module 9 or LED module 8 from the base of the substrate wall 16 toward the annular surface 36 of the stand surface 20 is drilled. Further, each LED module 9 is connected in series to the LED module 8 disposed on the opposing substrate surface 12A by a connection line 35.

  The light diffusing lens described in detail in the present embodiment diffuses or polarizes the light emitted through the light diffusing lens according to the installation status of the LED illumination lamp. A lens or a lens such as a Fresnel lens is used.

  In the LED lighting unit of the present invention having the above-described configuration, the light emitted from the LED modules 8 and 9 disposed on the respective substrate surfaces 12 toward the reflecting surface 25A that is symmetrical with the elliptical shade 26A is transmitted. The reflecting surface 25A having a parabolic mirror shape can be reflected and diffused substantially parallel to the central axis of the shade 26A, and a predetermined range can be irradiated through the light diffusion lens 7.

  As described above, when the LED modules 8 and 9 are arranged in parallel on the respective substrate surfaces 12 toward the reflection surface 25A, the LED modules 8 and 9 are uniformly reflected on the reflection surface 25A of the shade 26A and are applied to the light diffusion lens 7 of the shade 26. By emitting the light, illumination with uniform luminance can be achieved.

  Further, the heat generated from the LED elements 11 provided in the respective LED modules 8 and 9 is quickly dissipated by the heat radiating portion 14A made of a metal block, so that the LED elements are arranged in a small space or a narrow area with high density. Even in this case, it is possible to maintain high-luminance illumination without degrading the characteristics.

DESCRIPTION OF SYMBOLS 1 Street lamp 2 Support | pillar 3 Illumination head part 4, 4A Illumination unit 5, 6 Ballast 7 Light diffusion lens 8, 9 LED module 10 Diode substrate 11 LED element 12, 12A, 12B, 12C, 12D, 12E Substrate surface 13 Center Axis 14, 14 </ b> A Radiation portion 15 Screw 16, 16 </ b> A, 16 </ b> B, 16 </ b> C Substrate wall 17 Thermal conductive layer 20 Stand surface 21 Mounting plate 23 Protrusion portion 24 Fixed ring 25, 25 </ b> A Reflective surface 26, 26 </ b> A Shade 27 Surface 29 Band 31 Flange ring 32, 32A Conduit 33, 33A, 33B Substrate block 34 Electrical conductor 35 Connection line 36 Annular surface 37 One open end 38 The other open end

Claims (7)

A shade having a double-sided opening in which a reflecting surface whose inner surface is a parabolic mirror is formed;
A light diffusing lens provided at one opening end of the shade;
A substrate wall disposed on a substantially central axis of the shade toward the reflective surface of the shade;
At least one LED module provided on the substrate wall;
An LED lighting unit comprising: a heat dissipating part that is integrally provided with the substrate wall and exposed from the other opening end of the shade. The LED lighting unit according to claim 1, wherein the substrate walls are arranged parallel to each other with respect to a substantially central axis of the shade and toward the reflection surface of the shade. The LED lighting unit according to claim 1, wherein the substrate wall has a polygonal cross-sectional shape that is substantially orthogonal to a central axis of the shade. The said heat radiating part was formed by the metal block extended in the radial direction rather than the said board | substrate wall, and it protruded and formed outward from the other opening end of the said shade. The LED illumination unit according to 3. The LED heat unit according to claim 1, claim 2, claim 3, or claim 4, wherein the heat dissipating part is interchangeably fixed to the other opening end of the shade. The LED lighting unit according to claim 1, 2, 3, 4, or 5, wherein the LED module is replaceably fixed to the substrate wall by a detachable contact pressure means. The LED illuminating unit according to claim 1, claim 2, claim 3, claim 5, claim 5, or claim 6, wherein the heat dissipating part has a conduit drilled between the substrate wall.

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