JP5304420B2 - LED lighting equipment - Google Patents

Description

  The present invention relates to an LED lighting apparatus incorporating a plurality of LEDs, and more particularly to a heat dissipation technique for an LED incorporated in an apparatus main body.

  With the increase in output of LEDs, LEDs are starting to be used as alternative light sources for lamp light sources even in lighting fixtures that require high output. In recent years, in particular, lighting fixtures used as road lights and street lights have been proposed that employ LEDs as their light sources (see, for example, Patent Document 1). By the way, since the lifetime of the LED becomes shorter as the temperature becomes higher, when the LED is used as a light source, it is important to take measures for heat radiation of the LED.

JP 2007-242258 A

However, in the conventional lighting fixture, when the LED is used as the light source, the fixture main body is newly designed so as to obtain sufficient heat dissipation, so that there is a problem that development takes time, labor, and cost. .
This invention is made | formed in view of the situation mentioned above, and it aims at providing the LED lighting fixture which can fully radiate | emit the heat | fever of LED, even when using the existing fixture main body with insufficient heat dissipation design. And

  In order to achieve the above object, the present invention provides an LED lighting apparatus comprising a light source unit that disposes a plurality of LEDs at a position facing the irradiation opening in an apparatus main body provided with the irradiation opening. However, some LEDs are arranged on the inner surface side of the appliance body, and the LEDs arranged on the inner surface side are connected to a heat conduction plate connected to the inner surface to dissipate heat, and other LEDs Is characterized in that a heat radiating fin is connected to radiate heat.

  Moreover, the present invention is characterized in that, in the above invention, the light source unit is configured by fixing a plurality of plate-shaped support plates supporting one or a plurality of the LEDs to a frame body fixed to the instrument body. And

  Further, the present invention is the above invention, wherein the light source unit includes a flexible heat conductive member having flexibility provided between the heat conductive plate and the instrument body, and a shape along the shape of the inner surface. And a pressing member that presses the flexible heat conducting member against the inner side surface at the pressing portion.

  According to the present invention, the light source unit disposes a part of the LEDs on the inner surface side of the instrument body, and connects the heat conductive plate connected to the inner surface to the LEDs disposed on the inner surface side to dissipate heat. And it was set as the structure which connects a radiation fin to other LED and radiates heat. As a result, the LEDs arranged on the inner surface side are radiated to the instrument main body via the heat conduction plate, so when all the LEDs are radiated by the radiation fins, or all the LEDs are radiated by the heat conduction plate. Compared with the case where heat is radiated, high heat dissipation is obtained. In particular, since the LED that radiates heat to the instrument body via the heat conduction plate is arranged on the inner surface side, the heat conduction distance is shortened, and heat radiation to the instrument body inside the heat conduction path is suppressed efficiently. Heat can be dissipated to the instrument body. Thus, since the light source unit which improved the heat dissipation of LED can be obtained, the existing instrument main body designed by using the lamp as the light source can be used, and the cost for development and the like can be greatly suppressed.

It is a figure which shows the bottom face and side surface of the LED road light which concern on embodiment of this invention. It is a figure which shows the internal structure of an instrument main body, (A) is a top view of the instrument main body which removed the cover body, (B) is the perspective view. It is a figure which shows the integration state of a light source unit. It is a figure which shows the heat conduction path | route from LED to the inner surface of an instrument main body.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, a case where the present invention is applied to a road lamp is illustrated.
FIG. 1 is a diagram illustrating a bottom surface and a side surface of an LED lighting apparatus 1 as a road light according to the present embodiment.
The LED lighting apparatus 1 includes an apparatus main body 5 that is fixed to the upper end of a column 3 that is erected on the side of the road, and a base end portion 5 </ b> A of the apparatus body 5 is fixed to the column 3. The front end 5B is installed so as to overhang the road surface. An irradiation opening 11 is opened on the bottom surface 9 of the appliance main body 5, and a light source unit 13 that irradiates the road surface faces. In addition, a translucent plate 15 made of, for example, tempered glass or the like is fitted into the irradiation opening 11, and the instrument body 5 is sealed. The instrument body 5 has a lid body 7 that is provided so as to be rotatable about the base end portion 5 </ b> A. When the light source unit 13 is assembled, the lid body 7 is opened and disposed on the instrument body 5.

2A and 2B are views showing the internal structure of the instrument main body 5. FIG. 2A is a plan view of the instrument main body 5 with the lid 7 removed, and FIG. 2B is a perspective view thereof. FIG. 3 is a diagram illustrating an assembled state of the light source unit 13.
As shown in FIG. 2, the interior of the instrument body 5 is partitioned by a partition plate 19 into a component storage portion 21 on the base end portion 5A side and a light source storage portion 23 on the distal end portion 5B side. The component storage unit 21 is provided with a column fixing unit 25 that fixes the column 3 and a hinge 27 that rotatably supports the lid 7. The light source unit 13 is disposed in the light source storage unit 23, and the sealing and water tightness are enhanced by providing a packing 28 along the edge of the light source storage unit 23. The light source housing 23 has a power space 29 for arranging a power unit for supplying power to the light source unit 13 between the light source unit 13 and the component housing 21. The appliance body 5 is designed on the assumption that a rod-shaped lamp such as a mercury lamp or a high-pressure sodium lamp is housed in the light source housing 23, and usually the power supply space 29 has a lamp socket. A socket mounting base to which is attached is arranged.

As shown in FIG. 1, the light source unit 13 includes a plurality of LEDs 30, and these LEDs 30 are arranged so that illuminance and light distribution required as a road light can be obtained. That is, as shown in FIG. 3, the light source unit 13 includes a frame-like frame plate 40 that is placed and fixed on the flange 11 </ b> A as an edge of the irradiation opening 11 of the instrument body 5, and irradiates the same direction on the road surface. Alternatively, a plurality of (in the illustrated example) LEDs 30 are supported on a flat plate-shaped LED support plate 41 made of, for example, aluminum, and the LED support plates 41 are attached to the frame-shaped frame plate 40 according to the light distribution. It is assembled.
Thus, since the light source unit 13 is configured by assembling the plurality of LED support plates 41 supporting one or a plurality of LEDs 30 to the frame-like frame plate 40, a desired light distribution is realized without using a dedicated mold. The light source unit 13 can be easily configured.

  Now, when assembling the LED carrying plate 41 to the light source unit 13, at least some are assembled on the inner surface 6 side of the instrument body 5. And among LED30 with which the light source unit 13 is provided, with respect to LED30 (it attaches | subjects and distinguishes with 30 A of codes | symbols) arrange | positioned along this inner surface 6 on the inner surface 6 side, as shown in FIG. A relatively thick (for example, 1 mm) heat conduction plate 45 made of, for example, a copper plate having high thermal conductivity is connected to the back surface of the LED carrying plate 41 carrying the LED 30A, and the instrument main body is connected via the heat conduction plate 45. The heat of the LED 30 </ b> A is conducted to the inner surface 6 of the LED 5 and is radiated. Further, with respect to the remaining LEDs 30 (indicated by reference numeral 30B) arranged on the inner side of these LEDs 30A, the radiation fins 43 are connected to the back surface of the LED carrying plate 41 carrying the LEDs 30B. Therefore, heat is radiated to the inside of the instrument body 5.

  In this way, the light source unit 13 includes the heat conduction plate 45 that conducts the heat of the LED 30A to the inner side surface 6 of the fixture body 5 in addition to the heat radiation fins 43, and both of them radiate heat from the LEDs 30A and 30B. Even when the existing fixture body 5 that has insufficient heat dissipation capability is dissipated only by the radiation fins 43, the heat generated by some of the LEDs 30A among the LEDs 30 included in the light source unit 13 is released to the inner side surface 6 of the fixture body 5. Each LED 30 can be radiated well. Thereby, the LED 30 of the number or output which was not able to be incorporated in the existing instrument main body 5 due to a thermal problem can be incorporated.

In particular, in a lamp such as a road lamp used outdoors, the instrument body 5 has a hermetically sealed structure, so that heat is easily trapped and sufficient heat dissipation is not obtained with the radiating fins 43 alone. Therefore, since heat is radiated also from the instrument body 5, sufficient heat dissipation can be realized.
In addition, although the configuration in which all the LEDs 30 are connected to the instrument body 5 via the heat conduction plate 45 to dissipate heat by heat conduction can be considered, in such a configuration, the instrument body 5 is likely to be thermally saturated, Although it is difficult to obtain the heat dissipation effect of the LED 30, in this embodiment, the LED body 30 that radiates heat to the instrument body 5 by heat conduction is limited to a part, and thus such a problem does not occur.

  In addition, among the LEDs 30 included in the light source unit 13, at least some LEDs 30 </ b> A are arranged along the inner side surface 6 on the inner side surface 6 side, and these LEDs 30 </ b> A are connected to the instrument body 5 by heat conduction via the heat conduction plate 45. In order to dissipate heat to the inner surface 6, the heat conduction distance to the inner surface 6 is shortened, heat dissipation to the inside of the instrument body 5 while reaching the inner surface 6 is suppressed, and the heat of the LED 30 </ b> A is efficiently conducted to the inner surface 6. To dissipate heat.

  In addition, since the light source unit 13 is configured by assembling the plurality of LED support plates 41 to the frame-shaped frame plate 40, a lot of gaps are provided between the LED support plates 41, and the ventilation in the instrument body 5 is good. The heat dissipation is improved. Furthermore, by supporting the LED 30A and the LED 30B arranged on the inner side of the LED 30A on different LED support plates 41 and fixing them to the frame-like frame plate 40 so as not to contact each other, it is possible to inhibit mutual heat dissipation. It can also be absent.

Here, in the existing instrument main body 5, there is one in which the inner surface 6 has a curvature. In order to efficiently conduct the heat of the LED 30 </ b> A to the inner side surface 6, the end portion of the heat conductive plate 45 needs to be in close contact with the inner side surface 6, but it is difficult to make close contact with the inner side surface 6 having a curvature.
Therefore, in the present embodiment, as shown in FIGS. 3 and 4, a flexible heat conducting member 47 is connected to the end of the heat conducting plate 45, and the flexible heat conducting member 47 is connected to the instrument body 5. It is set as the structure pressed by the pressing member 49 along the curvature of the inner surface 6 of this.

More specifically, the flexible heat conducting member 47 is formed by bending, for example, a copper plate having high heat conductivity into a substantially L shape, and has a contact surface 47A with the inner surface 6. The flexible heat conducting member 47 is formed to have a thin thickness of about 0.5 mm, so that the contact surface 47A is flexible enough to bend along the curvature of the inner surface 6. ing.
In the pressing member 49, a pressing portion 49A (see FIG. 3) that contacts the contact surface 47A has a shape that follows the curvature of the inner surface 6, and the pressing surface 49A causes the inner surface 6 to be in contact with the contact surface 47A. The contact surface 47A can be brought into intimate contact with the inner side surface 6 having a curvature, whereby heat dissipation by heat conduction through the heat conduction plate 45 is maintained well.

  Thus, according to the present embodiment, the light source unit 13 arranges a part of the LEDs 30 </ b> A on the inner surface 6 side of the instrument body 5, and the LED 30 disposed on the inner surface 6 side is connected to the inner surface 6. The heat conducting plate 45 is connected to dissipate heat, and the other LEDs 30B are connected to dissipate fins 43 to dissipate heat. As a result, the LEDs 30A arranged on the inner surface 6 side are radiated to the instrument body 5 via the heat conducting plate 45, and therefore when all the LEDs 30 are radiated by the radiating fins 43, or all the LEDs 30 are thermally conducted. Compared with the case where heat is radiated to the instrument body 5 by the plate 45, high heat dissipation is obtained.

  In particular, the LED 30A that radiates heat to the instrument body 5 via the heat conduction plate 45 is arranged on the inner surface 6 side, so that the heat conduction distance is shortened and the heat radiation to the inside of the instrument body 5 in the heat conduction path is suppressed. Thus, it is possible to efficiently dissipate heat to the instrument body 5. Thus, since the light source unit 13 with improved heat dissipation of the LEDs 30 can be obtained, more existing LEDs 30 can be incorporated by using the existing fixture body 5 designed with the lamp as the light source, for development and the like. Such costs can be greatly reduced.

  Further, according to the present embodiment, the light source unit 13 is configured by fixing a plurality of plate-like LED carrying plates 41 carrying one or a plurality of LEDs 30 to a frame-like frame plate 40 fixed to the instrument body 5. The light source unit 13 can be configured to easily fix the plurality of LEDs 30 in a desired arrangement and orientation without using a dedicated mold or the like. In addition, a large number of gaps are provided between the LED support plates 41, so that local heat accumulation is unlikely to occur in the instrument body 5, and heat dissipation is improved.

  Further, according to the present embodiment, the light source unit 13 includes the flexible heat conducting member 47 having flexibility provided between the heat conducting plate 45 and the instrument body 5 and the shape of the inner surface 6 of the instrument body 5. And the pressing member 49 that presses the flexible heat conducting member 47 against the inner surface 6 at the pressing portion 49A. Therefore, the inner surface 6 has a curvature. Even in this case, the flexible heat conducting member 47 can be brought into close contact with the inner side surface 6, and heat dissipation through the heat conducting plate 45 can be maintained well.

In addition, embodiment mentioned above shows the one aspect | mode of this invention to the last, and a deformation | transformation and application are arbitrarily possible within the scope of the present invention.
For example, in the above-described embodiment, the case where the present invention is applied to a road lamp is illustrated. However, the present invention is not limited to this, and an LED having a plurality of LEDs arranged at a position facing the irradiation opening is provided on the instrument body provided with the irradiation opening. If it is a lighting fixture, it is possible to apply also to the lighting fixture installed outdoors, such as a park and a street lighting fixture, and the lighting fixture installed indoors, such as a ceiling light.

DESCRIPTION OF SYMBOLS 1 LED lighting fixture 5 Appliance main body 6 Inner side surface 11 Irradiation opening 13 Light source unit 30, 30A, 30B LED
40 frame-shaped frame plate 41 LED carrying plate 43 heat radiating fin 45 heat conducting plate 47 flexible heat conducting member 47A contact surface 49 pushing member 49A pushing portion

Claims (3)

An LED lighting device provided with a light source unit that arranges a plurality of LEDs at a position facing the irradiation opening on the device main body provided with the irradiation opening,
The light source unit arranges some LEDs on the inner surface side of the instrument body,
An LED illuminator characterized in that a heat conducting plate connected to the inner side surface is connected to the LED disposed on the inner side surface to dissipate heat, and a heat radiating fin is connected to the other LEDs to dissipate heat. .   2. The LED according to claim 1, wherein the light source unit is configured by fixing a plurality of plate-shaped support plates supporting one or a plurality of the LEDs to a frame body fixed to the instrument body. lighting equipment. The light source unit is
A flexible heat conducting member having flexibility provided between the heat conducting plate and the inner surface of the instrument body;
A pressing member that has a shape of a pressing portion that conforms to the shape of the inner surface of the instrument body, and a pressing member that presses the flexible heat conducting member against the inner surface at the pressing portion. The LED lighting fixture according to claim 1 or 2.

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