JP3164034U - LED lighting device - Google Patents

Abstract

A high-luminance LED illuminating device capable of irradiating light in all directions and having excellent energy efficiency is provided. An LED illumination device 11 includes a cylindrical core portion, a plurality of LED array blocks 21 attached to an outer wall surface of the cylindrical core portion so as to be arranged in the circumferential direction with respect to a central axis, and a power supply unit set. A solid 41 is provided. Here, the LED array block 21 includes an LED circuit board, a plurality of LEDs provided on the front surface of the LED circuit board, and a fin structure that is positioned on the back surface of the LED circuit board and is attached to the outer wall surface of the cylindrical core portion. And a transparent cover attached to the pedestal so as to cover the plurality of LEDs. [Selection] Figure 1

Description

  The present invention relates to an LED lighting device, and more particularly to an LED lighting device capable of irradiating light in all directions.

  For example, in a lighting device such as a street lamp, it is common to apply a lighting device capable of high power input because it is necessary to realize high luminance. Conventionally, incandescent lamps, mercury lamps, sodium lamps, and the like have been employed as light sources used in lighting apparatuses for such applications. However, since these light sources have low energy efficiency, there is a problem that power consumption increases. Therefore, in recent years, with the development of high power LED devices, LEDs have come to be used as light sources for such lighting devices from the viewpoints of improving energy efficiency, reducing power consumption, and improving durability performance. ing. As such an LED lighting device, for example, JP 2009-151967 A (Patent Document 1) is disclosed.

JP 2009-151967 A

  The LED illumination device described in Patent Literature 1 includes a support base provided with a power supply terminal, an illumination board attached to the support base, and a plurality of LEDs attached to be arranged in the longitudinal direction on the surface of the illumination board. And a translucent member attached to the support base so as to cover the light emitting direction of the LED. According to this configuration, it is possible to realize an illumination device capable of reducing power consumption by improving energy efficiency.

  However, the LED illumination device described in Patent Document 1 has directivity in light irradiation, and thus cannot be applied to an application where the entire surroundings need to be illuminated by illumination. That is, in the LED illumination device described in Patent Document 1, a plurality of LEDs as light sources are arranged in the longitudinal direction on the surface of the illumination substrate. Therefore, since the light irradiation has directivity that is unevenly distributed in a partial region in front of the surface of the illumination substrate, the luminance is significantly attenuated in other regions. Therefore, the LED lighting device described in Patent Document 1 cannot be used for applications that require lighting of the entire periphery of the lighting device.

  In addition, when the LED is applied to a lighting device that requires higher luminance, such as used in a factory or outdoors, the lighting device can be provided with more LEDs and capable of high power input. There is a need. In this case, it is necessary to provide sufficient heat dissipation means for the entire lighting device. In the LED lighting device described in Patent Document 1, a means is disclosed in which the emissivity of the surface of the support base is increased by anodizing the support base made of aluminum to improve the heat dissipation performance. However, when the LED is applied to a high-power illumination device, the heat dissipating means described in Patent Document 1 is insufficient, and a heat dissipating structure having a higher heat dissipating capability is required.

  An object of the present invention is to provide a high-intensity LED lighting device that can irradiate light in all directions and is excellent in energy efficiency.

  A plurality of cylindrical cores that extend long along the central axis and have fins for heat dissipation provided on the inner wall, and are arranged on the outer wall of the cylindrical core so as to be arranged in the circumferential direction with respect to the central axis LED array block, upper end cover for covering the upper end of the LED array block, cylindrical core and a cylindrical heat dissipation cover attached to the lower ends of the plurality of LED array blocks, and a power source cover attached to the lower end of the heat dissipation cover And a power supply circuit assembly including a power supply circuit disposed in a space inside the heat dissipation cover or the power supply cover, and a base provided at a lower end of the power supply cover. Here, the LED array block is positioned on the back surface of the LED circuit board, the LED circuit board extending long in the central axis direction, a plurality of LEDs arranged to be arranged in the central axis direction on the surface of the LED circuit board, and And it has the base part of the fin structure attached to the outer wall surface of a cylindrical core part, and the transparent cover attached to the base part so that it may extend long in the center axis direction and may cover several LED.

  According to this configuration, the heat generated by the light emission of the LED is sequentially conducted from the pedestal portion disposed on the inner diameter side of the LED circuit board to the cylindrical core portion disposed on the inner diameter side of the pedestal portion. The fins provided on the pedestal part and the cylindrical core part can radiate heat effectively. Thereby, since many LEDs can be applied to the lighting device, a high-luminance LED lighting device suitable for use in a factory or outdoors can be realized. Moreover, since the LED array block which has several LED is provided so that it may arrange in the circumferential direction, it is possible to irradiate light toward all directions from an illuminating device. Further, since the LED is used as the light source, this lighting device is also excellent in energy efficiency.

  Preferably, the cylindrical core has a polyhedral shape, and the LED array block is attached to each surface constituting the outer wall surface of the cylindrical core. According to this configuration, since the LED array blocks are arranged substantially equally in the circumferential direction, it is possible to irradiate light uniformly in all directions.

  Preferably, the pedestal portion includes pedestal portion fins extending toward the inner diameter direction.

  More preferably, the pedestal portion is located at the outer diameter side end of the pedestal portion fin, and is located at the outer wall that is in surface contact with the back surface of the LED circuit board, and at the inner diameter side end of the pedestal portion fin, and outside the cylindrical core portion. It further includes an inner wall that is in surface contact with the wall surface. According to this configuration, the thermal resistance between the back surface of the LED circuit board and the outer wall and the thermal resistance between the inner wall and the cylindrical core outer wall surface can be further reduced. Therefore, the heat generated by the light emission of the LED can be radiated more effectively through the pedestal fin provided on the pedestal and the fin provided on the inner wall surface of the cylindrical core. That is, it is possible to further enhance the heat dissipation effect of the entire lighting device.

  Preferably, the power supply circuit is disposed in a space surrounded by the inner wall surface of the heat dissipation cover. According to this configuration, heat generated in the power supply circuit can be radiated more effectively through the heat radiation cover.

  The LEDs may be provided in a plurality of rows in the circumferential direction on the surface of the LED circuit board.

  According to the present invention, heat can be effectively radiated by the fins provided on the pedestal portion and the cylindrical core portion. Therefore, since more LEDs can be applied to the lighting device, a high-luminance LED lighting device suitable for use in a factory or outdoors can be realized. Moreover, since the LED array block which has several LED is provided so that it may arrange in the circumferential direction, it is possible to irradiate light toward all directions from an illuminating device. Furthermore, since the LED is used as the light source, the lighting device according to the present invention is excellent in energy efficiency.

It is the side view which looked at the LED lighting apparatus which concerns on one Embodiment of this invention from the outer-diameter direction of the central axis. It is the top view which looked at the LED lighting apparatus shown in FIG. 1 from the upper direction of the central axis. It is a top view which shows the state which removed the upper end cover from the LED lighting apparatus shown in FIG. FIG. 4 is an enlarged top view showing one of the LED array blocks shown in FIG. 3. It is the side view which looked at the LED array block shown in FIG. 4 from the outer diameter direction.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. First, the structure of the LED lighting apparatus 11 which concerns on one Embodiment of this invention is demonstrated using FIGS. 1-3. FIG. 1 is a side view of an LED illumination device 11 according to an embodiment of the present invention as viewed from the outer diameter direction of a central axis O. FIG. FIG. 2 is a top view of the LED illumination device 11 shown in FIG. 1 viewed from above the central axis O. FIG. FIG. 3 is a top view showing a state in which the upper end cover 16 is removed from the LED lighting device 11 shown in FIG.

  With reference to FIGS. 1-3, the LED illuminating device 11 which concerns on one Embodiment of this invention can irradiate light toward all directions of an apparatus, for example, it is suitable for the use in a factory, the outdoors, etc. It is a high brightness LED lighting device. The LED lighting device 11 is mounted so as to be arranged in the circumferential direction with respect to the central axis O, with the cylindrical core 12 extending long along the central axis O and the outer diameter side of the cylindrical core 12. A plurality of LED array blocks 21, and a power source assembly 41 attached to the cylindrical core 12 and the lower end of the LED array block 21 are provided.

  The cylindrical core portion 12 is an aluminum cylindrical member having a regular heptagonal cross-sectional shape, and a plurality of heat radiation fins 14 protruding in the inner diameter direction are arranged on the inner wall surface 13 in the circumferential direction. Is provided. In this embodiment, this fin 14 is provided so that it may continue along an axial direction from the upper end of the cylindrical core part 12 to a lower end. The outer wall surface 15 of the cylindrical core portion 12 is composed of seven surfaces that are continuous in the circumferential direction so as to form a regular heptagon, and each surface is a smooth flat surface that extends long along the axial direction.

  The LED array block 21 has a plurality of LEDs serving as light sources, and is attached to each plane constituting the outer wall surface 15 of the cylindrical core portion 12. That is, the LED lighting device 11 according to the present embodiment includes seven LED array blocks 21 so that the LED array blocks 21 are evenly arranged in the circumferential direction on the outer wall surface 15 of the cylindrical core portion 12. Is attached. An upper end cover 16 that covers the entire upper end of the LED array block 21 is attached to the upper end of each LED array block 21. The detailed configuration of the LED array block 21 will be described later.

  The upper end cover 16 is a fan-shaped member that covers the upper end of each LED array block 21. In the present embodiment, a total of seven upper end covers 16 are provided. The upper end cover 16 is not individually divided in this way, but has an integrated shape that uniformly covers all the upper ends of the LED array blocks 21 arranged around the cylindrical core portion 12. May be.

  The power supply assembly 41 includes a heat dissipation cover 42 attached to the lower ends of the cylindrical core 12 and the LED array block 21, a power supply cover 43 attached to the lower end of the heat dissipation cover 42, and a lower end of the power supply cover 43. And a base 44 provided. The heat radiating cover 42 is a cylindrical member made of aluminum, and the outer peripheral surface is provided with fins 42f protruding in the outer diameter direction. The fins 42f are projecting ribs extending in the axial direction, and a plurality of fins 42f are provided so as to be arranged in the circumferential direction. The power supply cover 43 is a resin bowl-shaped member, and a base 44 connected to a power supply socket is provided at the lower end. In the present embodiment, a power supply circuit (not shown) that is electrically connected to each LED is attached in contact with the heat dissipation cover 42 in the space inside the heat dissipation cover 42. Thus, by attaching the power supply circuit, the heat generated in the power supply circuit can be effectively radiated through the fins 42f provided on the heat dissipation cover 42. The power circuit and the base 44 are electrically connected by an electric cord (not shown), and this electric cord is accommodated in the space inside the power source cover 43.

  Next, the configuration of the LED array block 21 according to an embodiment of the present invention will be described with reference to FIGS. 4 and 5. FIG. 4 is an enlarged top view showing one of the LED array blocks 21 shown in FIG. FIG. 5 is a side view of the LED array block 21 shown in FIG. 4 as viewed from the outer diameter direction, that is, from the arrow IV in FIG.

  4 and 5, the LED array block 21 includes an LED circuit board 22 extending in the direction of the central axis O, a plurality of LEDs 23 provided on the surface of the LED circuit board 22, and the LED circuit board 22. It has the base part 24 located in a back surface, and the transparent cover 29 attached to the base part 24. FIG.

  The pedestal portion 24 extends in the axial direction, and has an outer wall 25 that is in surface contact with the entire back surface of the LED circuit board 22, a pedestal fin 26 that extends from the outer wall 25 toward the inner diameter direction, and a pedestal fin. 26 and an inner wall 27 located at the inner diameter side end of the inner wall 26. The pedestal fin 26 and the inner wall 27 extend in the axial direction from the upper end to the lower end of the outer side wall 25 elongated in the axial direction. The inner side wall 27 is in surface contact with the outer wall surface 15 of the cylindrical core 12 in the state of the finished product shown in FIG. A pair of cover holding walls 28 projecting toward the outer diameter direction are provided at both ends in the circumferential direction of the outer side wall 25. A concave portion is provided at the tip of the cover holding wall 28, and both ends of the transparent cover 29 are fitted into the concave portion, and the transparent cover 29 is attached to the pedestal portion 24. The transparent cover 29 is a transparent resin member having a curved cross section that extends long in the direction of the central axis O, and is attached so as to cover all the LEDs 23 arranged on the pedestal portion 24 from the upper end to the lower end of the pedestal portion 24. Yes. As shown in FIG. 1, in a state where the upper end cover 16 is attached to the upper end of the LED array block 21, the transparent cover 29 and the upper end cover 16 prevent dust and the like from being mixed into the space where the LEDs 23 are arranged. be able to.

  In the present embodiment, a total of 20 LEDs 23 are divided into two rows in the circumferential direction on the surface of the LED circuit board 22 and arranged in ten rows in the central axis O direction. These LEDs 23 are electrically connected to each other through a conductive pattern provided on the LED circuit board 22 and are connected to the power supply circuit.

  When assembling the LED lighting device 11 according to the present embodiment, seven LED array blocks 21 are prepared, and the LED array blocks 21 are sequentially attached to each plane constituting the outer wall surface 15 of the cylindrical core portion 12. Go. That is, when manufacturing the LED lighting device 11, first, the LED array block 21 is mass-produced as one independent part, and then the work flow is to attach to the cylindrical core portion 12. Here, since the LED array block 21 has a simple structure as described above, mass production is relatively easy. Furthermore, after the LED array block 21 is assembled, it can be handled as a single component, which is very convenient for transportation and the like. As described above, the LED lighting device 11 according to the present embodiment includes a configuration capable of facilitating work, and thus can reduce the manufacturing cost.

  Next, the function of the LED lighting device 11 according to the present embodiment will be described with reference to FIGS. 1 to 5, when the base 44 of the LED lighting device 11 is connected to the power socket and a voltage is applied to the power circuit, a total of 140 LEDs 23 attached to the seven LED array blocks 21 are respectively present. Light. As described above, since the LED array block 21 is mounted so as to be evenly arranged in the circumferential direction with the central axis O as a reference, light is uniformly emitted toward all directions of the LED illumination device 11. It is possible.

  The LED lighting device 11 according to the present embodiment is a high-power lighting device having a total of 140 LEDs 23. Therefore, the total amount of heat generated by each LED 23 emitting light is relatively large. Here, in the present embodiment, the back surface of the LED circuit board 22 provided with the LEDs 23 and the pedestal portion 24 of the fin structure are arranged so as to be in surface contact with each other, and the pedestal portion 24 and the fins 14 are provided. The cylindrical core portion 12 is disposed so as to be in surface contact. Therefore, the heat generated by the light emission of the LED 23 can be radiated more effectively through the fins provided on the pedestal portion 24 and the cylindrical core portion 12. This will be described in detail below.

  As described above, in the present embodiment, the entire back surface of the LED circuit board 22 is configured to be in surface contact with the outer wall 25 of the pedestal portion 24. Therefore, since the thermal resistance between the LED circuit board 22 and the outer wall 25 is further reduced, the heat generated by the light emission of the LED 23 is effectively transmitted to the pedestal 24. Since the pedestal portion 24 is provided with pedestal portion fins 26 extending in the inner diameter direction from the outer wall 25, heat can be radiated to the outside through the pedestal portion fins 26.

  The LED array block 21 is attached to the cylindrical core 12 such that the inner wall 27 of the pedestal 24 is in surface contact with the outer wall 15 of the cylindrical core 12. Therefore, since the thermal resistance between the inner wall 27 of the pedestal 24 and the outer wall 15 of the cylindrical core 12 is further reduced, the heat accumulated in the pedestal 24 is transferred to the cylindrical core 12. Effectively communicate. A plurality of fins 14 protruding in the inner diameter direction are provided on the inner wall surface 13 of the cylindrical core portion 12 so as to be arranged in the circumferential direction. Therefore, the heat accumulated in the cylindrical core portion 12 can be radiated to the outside through these fins 14.

  As described above, in the LED lighting device 11 according to the present embodiment, the heat generated by the light emission of each LED 23 is effectively transferred to the pedestal portion 24 and the cylindrical core portion 12 and is provided on these members. The heat is dissipated more effectively through the heat dissipating fins. Further, the fins 14 and the pedestal fins 26 of the cylindrical core portion 12 extend in the axial direction from the upper end to the lower end of the cylindrical core portion 12. Therefore, the convection of the air generated by heat inside the cylindrical core portion 12 and the pedestal portion 24 flows to the upper end side and is easily released to the outside from the upper end opening. Therefore, the heat dissipation effect of the entire device can be further enhanced.

  Since the LED lighting device 11 according to the present embodiment has the various configurations described above, it has high heat dissipation performance. Accordingly, it is possible to configure a high power lighting device by applying a large number of LED elements that are relatively weak to heat to one lighting device. In the present embodiment, a total of 140 LED elements are applied as described above. As a result, the total luminous flux emitted from the entire lighting device becomes very large, so that it is possible to obtain brightness suitable for use in, for example, a factory or outdoors, even when the light is irradiated in all directions as described above. It is. In addition, as a natural effect, the use of LED elements as the light source greatly increases energy efficiency compared to incandescent lamps, mercury lamps, sodium lamps, etc. Can be improved. That is, according to the present invention, it is possible to realize a high-intensity LED lighting device that can irradiate light in all directions and is excellent in energy efficiency.

  In the above-described embodiment, the case where the cylindrical core portion has a regular heptagonal cross-sectional shape has been described. Number), regular n-hedron shape (n is a positive number of 4 or more), arbitrary polyhedron shape, or circular shape. In this case, since the LED array block can be mass-produced as an independent member, the number of LED array blocks to be applied can be easily increased / decreased as appropriate based on the shape and size of the cylindrical core or the application. Is possible.

  Further, in the above-described embodiment, the fin structure of the pedestal portion includes an outer wall, a pedestal fin extending from the outer wall toward the inner diameter direction, and an inner wall located at the inner diameter side end of the pedestal fin. Although the case where it was comprised was described, it is not restricted to this, For example, the structure which has the fin extended in the circumferential direction may be sufficient, and it is also possible to apply the fin structure of any other shape. Further, regarding the fins provided on the inner wall surface of the cylindrical core portion, any shape of fins may be applied in the same manner.

  In the above embodiment, the case where the heat radiation effect is enhanced by providing fins on the constituent members has been described. However, the present invention is not limited to this. For example, the surface of the member is made porous by surface treatment such as alumite treatment. The structure which raises an effect may be sufficient. Moreover, the structure which uses a fin structure and the surface treatment for heat radiation together may be sufficient.

  As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to the thing of embodiment shown in figure. Various modifications and variations can be made to the illustrated embodiment within the same range as the present invention or within an equivalent range.

  The present invention provides a high-intensity LED lighting device that is excellent in manufacturing cost and energy efficiency and capable of irradiating light in all directions, and is therefore advantageously used in the manufacturing industry of lighting devices.

  DESCRIPTION OF SYMBOLS 11 LED lighting apparatus, 12 Cylindrical core part, 13 Inner wall surface, 14, 42f Fin, 15 Outer wall surface, 16 Upper end cover, 21 LED array block, 22 LED circuit board, 23 LED, 24 base part, 25 Outer wall side, 26 Base fin, 27 inner wall, 28 cover holding wall, 29 transparent cover, 41 power supply assembly, 42 heat dissipation cover, 43 power supply cover, 44 base.

Claims (6)

A cylindrical core portion extending long along the central axis and having a heat-radiating fin on the inner wall surface;
A plurality of LED array blocks attached to the outer wall surface of the cylindrical core portion so as to be arranged in the circumferential direction with reference to the central axis;
An upper end cover covering the upper end of the LED array block;
A cylindrical heat dissipation cover attached to the cylindrical core and the lower ends of the plurality of LED array blocks, a power supply cover attached to the lower end of the heat dissipation cover, and the inside of the heat dissipation cover or the power supply cover A power supply assembly having a power supply circuit disposed in the space and a base provided at a lower end of the power supply cover,
The LED array block is:
An LED circuit board extending in the central axis direction;
A plurality of LEDs provided so as to be arranged in the central axis direction on the surface of the LED circuit board;
A pedestal portion of a fin structure located on the back surface of the LED circuit board and attached to the outer wall surface of the cylindrical core portion;
An LED lighting device, comprising: a transparent cover that extends long in a central axis direction and is attached to the pedestal so as to cover the plurality of LEDs. The cylindrical core has a polyhedral shape,
The LED illumination device according to claim 1, wherein the LED array block is attached to each surface constituting an outer wall surface of the cylindrical core portion.   The LED lighting device according to claim 1, wherein the pedestal portion includes a pedestal portion fin extending toward the inner diameter direction.   The pedestal portion is located at an outer diameter side end of the pedestal portion fin, is located at an outer wall that is in surface contact with the back surface of the LED circuit board, and is located at an inner diameter side end of the pedestal portion fin. The LED lighting device according to claim 3, further comprising an inner wall that is in surface contact with the outer wall surface.   The LED lighting device according to claim 1, wherein the power supply circuit is disposed in a space surrounded by an inner wall surface of the heat dissipation cover.   The LED lighting device according to claim 1, wherein the LEDs are provided in a plurality of rows in the circumferential direction on the surface of the LED circuit board.

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