JP2017079312A - Heat sink/lens integrated type led unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat sink/lens integrated type LED unit which is less in temperature rise since heat dissipation is excellent and whose replacement is easily performed since maintainability is excellent and also to provide a lighting fixture for a streetlight including the same.SOLUTION: A heat sink/lens integrated type LED unit includes: a heat sink in which a plurality of long fins are provided in parallel to each other on a second surface opposite to a first roughly planar surface; a thermal conductive resin sheet laminated on the first surface; a resin substrate laminated on the surface opposite to the first surface out of the thermal conductive resin sheet; a plurality of LED elements which are arrayed on the surface opposite to the thermal conductive resin sheet out of the resin substrate; and a lens body which includes a plurality of lenses having orientation covering each of the plurality of LED elements.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a novel heat sink / lens integrated LED unit and a streetlight luminaire including the same.

  Conventionally, high-intensity lamps and fluorescent lamps have been used as light sources in lighting fixtures for illuminating road surfaces and wall surfaces such as roads and pavements, and reflectors are used to uniformly illuminate the road surface with light from the light sources. Is used.

  Some of these light sources require power consumption exceeding 100 W, and since their lifetime is short, there is a problem that they are very expensive and have a large environmental load. Lighting fixtures using LED (light emitting diode) elements as light sources are becoming popular for street lamps.

  Here, the LED element has a possibility of deteriorating due to heat generated from the element main body or a rise in ambient temperature, and there is a problem that appropriate cooling is required. No. 187930) proposes a lighting measure in which a main body of a lighting device is cast in stages with various kinds of metal materials having different melting points to provide a high heat dissipation effect.

  Further, for example, in Patent Document 2 (Japanese Patent Application Laid-Open No. 2011-159567), a housing formed by light metal die-casting is provided to provide a lighting device for a streetlight that efficiently dissipates heat energy generated from an LED element and a power supply device. There has been proposed a lighting device for a streetlight having a body, a lid formed of a metal material having a higher thermal conductivity than the casing, and a substrate in thermal contact with the lid.

JP 2009-187930 A JP 2011-159567 A

  However, in the conventional streetlight luminaires proposed in Patent Document 1 and Patent Document 2 described above, attention is paid to the material and structure of the housing and the lid to solve the problems related to heat generation from the LED elements. There was still room for improvement.

  Also, when the LED element deteriorates, etc., it becomes necessary to replace the substrate on which the LED elements are arranged. However, the conventional lighting fixture for street lamps has a structure in which the substrate on which the LED elements are arranged can be easily replaced. There is also a problem that it is inferior in maintainability.

  Therefore, the inventor of the present invention pays attention to the fact that the substrate on which the LED elements are arranged and the mounting portion of the substrate have not been sufficiently studied, and as a result of repeated examinations and experiments, it is excellent in heat dissipation. In addition, a heat sink / lens integrated LED unit and a streetlight luminaire including the LED unit have been realized.

That is, the present invention
A heat sink in which the first surface is substantially planar, and a plurality of elongated fins are provided in parallel on the second surface facing the first surface;
A thermally conductive resin sheet laminated on the first surface;
A resin substrate laminated on the surface of the thermally conductive resin sheet opposite to the first surface;
A plurality of LED elements arranged on the surface of the resin substrate opposite to the thermally conductive resin sheet;
A lens body including a plurality of orientation lenses covering each of the plurality of LED elements;
A heat sink / lens integrated LED unit, comprising:
I will provide a.

  The heat sink / lens integrated LED unit of the present invention having such a configuration is excellent in heat dissipation and little temperature rise when used in a streetlight lighting device, and is easy to replace and excellent in maintainability. is there.

  In the heat sink / lens integrated LED unit of the present invention, the lens body includes a plurality of alignment lenses arranged in a first direction when viewed in a plane substantially parallel to the first plane. A first lens body, a second lens body including a plurality of orientation lenses arranged in a second direction, a third lens body including a plurality of orientation lenses arranged in a third direction, and a fourth direction. It is preferable to include at least two types of lens bodies among the fourth lens bodies including a plurality of orientation lenses arranged in the same manner.

  The heat sink / lens integrated LED unit of the present invention having such a configuration can be used for a streetlight lighting device because light can be emitted in a plurality of directions with a minimum one heat sink integrated LED unit. It is excellent in use efficiency.

  In the heat sink / lens integrated LED unit of the present invention, the heat sink is preferably made of aluminum or an aluminum alloy.

  When the heat sink / lens integrated LED unit of the present invention having such a configuration is used in a lighting device for a streetlight, it is more surely excellent in heat dissipation and has little temperature rise.

  In the heat sink / lens integrated LED unit of the present invention, it is preferable that the thermally conductive resin sheet is made of a silicone resin.

  The heat sink / lens integrated LED unit of the present invention having such a configuration is more excellent in heat dissipation and less in temperature rise when used in a streetlight lighting fixture.

  In the heat sink / lens integrated LED unit of the present invention, it is preferable that the resin substrate is formed of an epoxy resin copper-clad laminate.

  The heat sink / lens-integrated LED unit of the present invention having such a configuration, when used in a streetlight lighting fixture, is more reliably superior in heat dissipation and has little temperature rise.

  According to the present invention, it is possible to realize a heat sink / lens integrated LED unit that is excellent in heat dissipation, has a low temperature rise, has excellent maintainability, and can be easily replaced, and a streetlight lighting device including the same.

It is a schematic perspective view of one Embodiment of the heat sink and lens integrated LED unit of this invention. FIG. 2 is a schematic view of the heat sink / lens integrated LED unit 1 shown in FIG. It is a schematic perspective view of the modification of the heat sink and lens integrated LED unit 1 shown in FIG.

  Hereinafter, one embodiment of the heat sink / lens integrated LED unit of the present invention will be described with reference to the drawings, but the present invention is not limited to these. In the following description, the same or corresponding parts are denoted by the same reference numerals, and redundant description may be omitted. Moreover, since the drawings are for conceptually explaining the present invention, the dimensions, ratios or numbers may be exaggerated or simplified as necessary for easy understanding.

  As shown in FIGS. 1 and 2, the heat sink / lens integrated LED unit 1 according to this embodiment includes a heat sink 2, a heat conductive resin sheet 4, a resin substrate 6, and LEDs arranged on the resin substrate 6. A plurality of elements (not shown) and a lens body 8 including an orientation lens 8a covering the LED elements are provided.

  This heat sink 2 may be comprised with a conventionally well-known material, for example, can be comprised with materials, such as an extrusion material of aluminum or aluminum alloy. Especially, it is preferable to use A6063S from a viewpoint of selecting the optimal heat dissipation material on the basis of the junction temperature of an LED element.

  In the heat sink 2, the first surface 2a of the base portion is substantially flat, and a plurality of long fins 2b are provided in parallel on the second surface opposite to the first surface 2a with a gap therebetween. It has been.

  The thickness of the base portion (L1 in FIG. 2) may be appropriately selected within a range not impairing the effects of the present invention, but the viewpoint of reducing the burden on the LED element at the time of high output and extending the life. Therefore, for example, it is preferably 2 to 10 mm, more preferably 3 to 5 mm.

  The number and spacing of adjacent fins 2b may be selected as appropriate within a range that does not impair the effects of the present invention. In this embodiment, twelve fins 2b are provided, and the area of the heat sink 2 is efficiently reduced. From the viewpoint of doing, the interval between the fins 2b is preferably 3 to 9 mm, for example.

  Further, the length of the fin 2b (L2 in FIG. 2) may be appropriately selected within a range that does not impair the effects of the present invention. From the viewpoint of exhibiting a suitable heat dissipation capability, for example, 15 to 25, and more It is preferably 17 to 22 mm.

  Next, the heat conductive resin sheet 4 laminated | stacked on the 1st surface 2a of the heat sink 2 is being fixed to the 1st surface 2a, for example with the adhesive agent, and has insulation while having heat conductivity. Any material can be used as long as it can be used for a long period of time.

  As the heat conductive resin sheet 4, a heat conductive resin sheet can be used. Among them, since the LED element has a long life, from the viewpoint of excellent reliability for long-term use, for example, a silicone resin or the like. Can be composed of materials. For example, heat conduction including a polymer matrix containing silicone, olefin and / or acrylic, a heat conductive filler containing alumina, magnesia and / or metal powder, and an additive such as a heat resistance improver and / or a flame retardant. It is preferable to use a conductive resin sheet (heat dissipation material).

  In addition, the thickness of the heat conductive sheet 4 may be appropriately selected within a range that does not impair the effects of the present invention. From the viewpoint of considering the insulation between the LED element and the heat sink 2, for example, 0.5 to It is preferably 2 mm, and more preferably 1.0 to 1.5 mm.

  Next, the resin substrate 6 laminated on the surface opposite to the first surface 2a of the heat conductive resin sheet 4 is fixed to the heat conductive resin sheet 4 with an adhesive, for example, not shown. However, a plurality of LED elements (16 in the present embodiment) are arranged on the surface of the resin substrate 6 opposite to the thermally conductive resin sheet 4.

  Conventionally, an aluminum substrate has been used as the resin substrate 6 from the viewpoint of good heat dissipation. However, as a result of repeated studies by the present inventors, the heat sink / lens integrated LED unit of the present embodiment In No. 1, the resin substrate was found to have better heat dissipation. That is, in this embodiment, it is preferable to use a material such as an epoxy resin copper-clad laminate for the resin substrate 6. Among these, a laminate in which copper is stretched on a glass cloth covered with an epoxy resin as a base material is preferable. By using this, a metal substrate is conventionally used, but performance equivalent to or higher can be exhibited.

  In addition, the thickness of the resin substrate 6 may be appropriately selected within a range that does not impair the effects of the present invention. From the viewpoint of ensuring withstand voltage insulation and suppressing warpage, for example, 0.8 to 1.2 mm. Preferably there is.

  Next, the heat sink / lens integrated LED unit 1 of the present embodiment includes four lens bodies 8 including four orientation lenses 8a. Therefore, a total of 16 LED elements are included, and the LED elements are arranged on the resin substrate 6 at positions corresponding to the orientation lenses 8a of the lens body 8 shown in FIG.

  Here, the orientation lens 8a included in the lens body 8 irradiates the light from the LED element located on the lower side thereof, and can irradiate in a predetermined direction. All the orientation lenses 8a in FIG. 1 are arranged so as to irradiate light in a direction inclined in the direction of arrow X from a direction substantially perpendicular to the first surface 2a, not in a direction substantially perpendicular to the first surface 2a. Has been.

  Such an orientation lens 8a can set the direction of the light to irradiate, for example, can be comprised with materials, such as a polycarbonate resin, an acrylic resin, glass.

  The lens body 8 in the present embodiment is fixed to the resin substrate 6 with, for example, an adhesive or the like, and has a screw through-hole 10 in the center, and the resin substrate 6 and the thermally conductive resin sheet 4 are interposed therebetween. The heat sink 2 is screwed.

  The heat sink / lens integrated LED unit 1 of the present embodiment having the above-described configuration is excellent in heat dissipation and has a small temperature rise when used for a streetlight lighting device. It is easy to replace because of its excellent maintainability.

  As mentioned above, although one Embodiment of the heat sink and lens integrated LED unit of this invention was described, this invention is not limited only to these. The specific configurations of the heat sink 2, the heat conductive resin sheet 4, the resin substrate 6 and the lens body 8 can be appropriately changed within a range not impairing the effects of the present invention, and they are all within the technical scope of the present invention. included.

≪Modification≫
Here, with reference to FIG. 3, the modification of the heat sink and lens integrated LED unit 1 is demonstrated. The heat sink / lens integrated LED unit 11 according to this modification includes lens bodies 8A, 8B, 8C, and 8D from the right side to the left side in FIG.

  As for the lens bodies 8A and 8C, the orientation lens 8a is inclined in the direction of the arrow X from the direction substantially perpendicular to the first surface 2a (first direction) as in the above embodiment. It arrange | positions so that light may be irradiated.

  On the other hand, in the lens body 8B, unlike the lens bodies 8A and 8C, the orientation lens 8a is inclined in the direction of the arrow Y1 from the direction substantially perpendicular to the first surface 2a (second direction). It arrange | positions so that light may be irradiated to.

  Further, regarding the lens body 8D, unlike the lens bodies 8A, 8C and 8B, the orientation lens 8a is inclined in the direction of the arrow Y2 from the direction substantially perpendicular to the first surface 2a (third direction). It arrange | positions so that light may be irradiated to.

  In this modification, the single heat sink / lens integrated LED unit 11 is used to change the direction of a part of the plurality of lens bodies 8 so that the light from the plurality of LED elements is first reflected. Irradiation can be in the direction, the second direction, and the third direction. Of course, it may be configured to irradiate light in a direction inclined in a direction opposite to the arrow X (fourth direction).

  The heat sink / lens integrated LED unit according to the present invention can be suitably used when light is irradiated in a plurality of directions, and can be particularly suitably used for a lighting device for a streetlight. In a streetlight installed in a public place, when the LED element is deteriorated, the heat sink / lens integrated LED unit can be easily replaced, and the maintainability is excellent.

  The LED unit with integrated heat sink / lens according to the present invention is preferably used in a streetlight by attaching it to a mount having an angle adjustment function capable of adjusting the angle in a stepwise manner, suitably depending on the width of the road. Can be adjusted.

  Further, the heat sink / lens integrated LED unit according to the present invention can be used by arranging a plurality of them freely in the vertical and / or horizontal directions, and various irradiation performances can be constructed according to the use and place of use. it can.

1, 11 ... Heat sink / lens integrated LED unit,
2 ... heat sink,
2a ... first surface,
2b ... fins,
4 ... heat conductive resin sheet,
6 ... Resin substrate,
8, 8A, 8B, 8C, 8D ... lens body,
8a: orientation lens,
10: Screw through hole (screw).

That is, the present invention
A heat sink in which the first surface is substantially planar, and a plurality of elongated fins are provided in parallel on the second surface facing the first surface;
A thermally conductive resin sheet laminated on the first surface;
A resin substrate laminated on the surface of the thermally conductive resin sheet opposite to the first surface;
A plurality of LED elements arranged on the surface of the resin substrate opposite to the thermally conductive resin sheet;
A plurality of lens bodies integrally formed including a plurality of orientation lenses covering each of the plurality of LED elements ;
A heat sink / lens integrated LED unit, comprising:
I will provide a.

The heat sink / lens integrated LED unit of the present invention having such a configuration has excellent heat dissipation and little temperature rise when used in a streetlight lighting fixture, and also replaces and irradiates deteriorated LED elements. It is easy to reset in the direction of and is easy to maintain.

In heatsink lens-integrated LED unit of the present invention described above, the lens body, when tried at substantially a plane parallel to said first plane, the orientation lens plurality arranged in a first direction Nde including lenses body formed integrally, and comprise a second integral-configured lens body alignment lens plurality arranged Nde contains in the direction of, preferably.

According to the present invention, a heat sink / lens integrated LED unit having excellent heat dissipation, low temperature rise, excellent maintainability, and easy change of unit and change of light orientation, and a lighting device for a streetlight including the same Can be realized.

As for the lens bodies 8A and 8C, as in the above embodiment, the orientation lens 8a is inclined in the direction of the arrow X from the direction substantially perpendicular to the first surface 2a (first direction ). It arrange | positions so that light may be irradiated.

In contrast, for the lens body 8B, unlike lens body 8A and 8C, a direction oriented lens 8a is inclined from a direction substantially perpendicular to the first surface 2a in the direction of arrow Y1 (second orientation) It arrange | positions so that light may be irradiated to.

Furthermore, for the lens body 8D, the lens body 8A, unlike 8C and 8B, a direction oriented lens 8a is inclined from a direction substantially perpendicular to the first surface 2a in the direction of the arrow Y2 (third direction) It arrange | positions so that light may be irradiated to.

In this modification, the single heat sink / lens integrated LED unit 11 is used to change the direction of a part of the plurality of lens bodies 8 so that the light from the plurality of LED elements is first reflected. Irradiation can be in a direction , a second direction, and a third direction . Of course, it may be configured to irradiate the light in a direction which is inclined in a direction opposite to the arrow X (a fourth orientation).

That is, the present invention
A heat sink in which the first surface is substantially planar, and a plurality of elongated fins are provided in parallel on the second surface facing the first surface;
A thermally conductive resin sheet laminated on the first surface;
A resin substrate laminated on the surface of the thermally conductive resin sheet opposite to the first surface;
A plurality of LED elements arranged on the surface of the resin substrate opposite to the thermally conductive resin sheet;
A plurality of lens bodies integrally formed including a plurality of orientation lenses covering each of the plurality of LED elements;
Equipped with,
When the lens body is viewed in a plane substantially parallel to the first surface, the lens body integrally including a plurality of orientation lenses arranged in the first direction, and the second direction Including a lens body configured integrally including a plurality of orientation lenses arranged in
Heatsink lens-integrated LED unit, characterized in Rukoto removably used in lighting equipment,
I will provide a.

Claims (6)

A heat sink in which the first surface is substantially planar, and a plurality of elongated fins are provided in parallel on the second surface facing the first surface;
A thermally conductive resin sheet laminated on the first surface;
A resin substrate laminated on the surface of the thermally conductive resin sheet opposite to the first surface;
A plurality of LED elements arranged on the surface of the resin substrate opposite to the thermally conductive resin sheet;
A lens body including a plurality of orientation lenses covering each of the plurality of LED elements;
A heat sink / lens integrated LED unit. When the lens body is viewed in a plane substantially parallel to the first surface, a first lens body including a plurality of orientation lenses arranged in the first direction, an orientation lens arranged in the second direction A second lens body including a plurality of lenses, a third lens body including a plurality of alignment lenses arranged in a third direction, and a fourth lens body including a plurality of alignment lenses arranged in a fourth direction. Including at least two kinds of lens bodies,
The heat sink / lens integrated LED unit according to claim 1. The heat sink is made of aluminum or an aluminum alloy;
The heat sink / lens integrated LED unit according to claim 1 or 2. The thermally conductive resin sheet is made of silicone resin,
The heat sink / lens integrated LED unit according to any one of claims 1 to 3. The resin substrate is composed of an epoxy resin copper clad laminate,
The heat sink / lens integrated LED unit according to any one of claims 1 to 4.   A lighting device for a streetlight including the heat sink / lens integrated LED unit according to any one of claims 1 to 5.

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