WO2014175024A1

WO2014175024A1 - Lighting apparatus

Info

Publication number: WO2014175024A1
Application number: PCT/JP2014/059740
Authority: WO
Inventors: 繁樹青木
Original assignee: Ｎｅｃライティング株式会社
Priority date: 2013-04-26
Filing date: 2014-04-02
Publication date: 2014-10-30
Also published as: JP6508556B2; CN105164465A; JP2018078115A; JPWO2014175024A1; CN105164465B; JP6272310B2

Abstract

A lighting apparatus (100) according to the present application comprises: a main body (10) having a suspension portion at the upper center and having an open lower portion; a power source device (20) arranged at the central portion inside the opening of the main body (10); a reflector (30) arranged to cover the entire opening of the main body (10); an annular radiator (40) arranged at the lower peripheral portion of the reflector (30); a substrate (50) arranged at the lower portion of the radiator (40); a plurality of LED elements (51) arranged on the lower surface of the substrate (50); and an annular diffusion cover (60) arranged at the lower portion of the substrate (50) to cover the LED elements (51). The reflector (30) includes: a central portion (31) formed projecting downward; an insulating holding portion (32) located on the outer periphery side of the central portion (31) and kept at a constant distance from the lower end of the main body (10); and a projection portion (33) located on the outer periphery side of the insulating holding portion (32) projecting toward the main body (10). The main body (10) and the projection portion (33) of the reflector (30) are anchored by a fixing means.

Description

lighting equipment

The present invention relates to a lighting fixture.

Recently, it has been studied to apply an LED element to a lighting fixture (so-called pendant light) suspended from a ceiling by a cord (see, for example, Patent Document 1).

JP 2012-59455 A

The above-mentioned lighting fixture is required to have further technical improvements such as the problem of heat generation of the LED and the same lighting as a fluorescent lamp.

Therefore, an object of the present invention is to improve a pendant light using a conventional LED element and provide a technically superior lighting fixture.

In order to achieve the above object, the first lighting fixture of the present invention comprises:
A main body having a hanging part in the upper center part and having a lower part opened;
A power supply device disposed inside the center of the opening of the main body;
A reflector arranged to cover the entire opening of the body;
An annular radiator disposed in the lower peripheral portion of the reflector;
An annular substrate disposed under the radiator;
A plurality of LED elements disposed on the lower surface of the substrate;
An annular diffusion cover disposed under the substrate so as to cover the LED element,
The reflector is
A central portion that is convex downward,
An insulating holding portion having a constant distance from the lower end of the main body located on the outer peripheral side of the central portion;
Including a protruding portion protruding toward the main body located on the outer peripheral side of the insulating holding portion,
The main body and the protruding portion of the reflecting plate are fixed by a fixing means.

The second lighting fixture of the present invention is:
A main body having a hanging part in the upper center part and having a lower part opened;
A power supply device disposed inside the center of the opening of the main body;
A reflector arranged to cover the entire opening of the body;
An annular radiator disposed in the lower peripheral portion of the reflector;
An annular substrate disposed under the radiator;
A plurality of LED elements disposed on the lower surface of the substrate;
An annular diffusion cover disposed under the substrate so as to cover the LED element,
The reflector is
A central portion that is convex downward,
Including an outer peripheral portion located on the outer peripheral side of the central portion,
The diffusion cover is
An emission part for emitting the light emitted from the LED element to the reflector side;
The central part of the reflector is
An inwardly convex first curved surface portion located on the outer peripheral portion side;
An outwardly convex second curved surface portion located closer to the center than the first curved surface portion,
The intersection of the first curved surface portion and the second curved surface portion and the lower end of the light emitting portion of the diffusion cover are substantially the same height.

The third lighting fixture of the present invention is:
A main body having a hanging part in the upper center part and having a lower part opened;
A power supply device disposed inside the center of the opening of the main body;
A reflector arranged to cover the entire opening of the body;
An annular radiator disposed in the lower peripheral portion of the reflector;
An annular substrate disposed under the radiator;
A plurality of LED elements disposed on the lower surface of the substrate;
An annular diffusion cover disposed under the substrate so as to cover the LED element,
The reflector includes a protruding portion protruding on the outer peripheral side toward the main body side,
The plurality of LED elements are arranged to form two or more annular rows on the lower surface of the substrate,
The LED elements in the annular array on the outer peripheral side have a thermal pad that is electrically connected to an electrode on the outer peripheral side close to a place where the reflector and the radiator are in contact with each other.

The fourth lighting fixture of the present invention is:
A main body having a hanging part in the upper center part and having a lower part opened;
A power supply device disposed inside the center of the opening of the main body;
A reflector arranged to cover the entire opening of the body;
An annular radiator disposed in the lower peripheral portion of the reflector;
An annular substrate disposed under the radiator;
A plurality of LED elements disposed on the lower surface of the substrate;
An annular diffusion cover disposed under the substrate so as to cover the LED element,
The radiator is divided into a plurality of parts.

According to the first lighting fixture of the present invention, since the reflection plate has the insulating holding portion, high insulation can be ensured between the power supply device and the substrate on which the LED elements are arranged, and the reflection Since the plate has the protruding portion, a cavity is formed in a part of the upper surface of the radiator, and the heat radiation area can be increased, so that the heat radiation effect is enhanced.

According to the second lighting fixture of the present invention, the intersection of the first curved surface portion and the second curved surface portion of the reflecting plate is set to be substantially the same height as the lower end of the emitting portion of the diffusion cover, so that the diffusion cover A part of the light emitted from the emitting part can be reflected by the first curved surface part of the reflecting plate to the central part of the reflecting plate, and the light emission state of the reflecting plate central part can be made more uniform.

According to the third lighting fixture of the present invention, on the upper surface of the substrate, the thermal pad is disposed at a position corresponding to the upper part of the LED element in the annular row on the outer peripheral side so as to be in contact with the radiator. Thus, the heat dissipation effect can be enhanced and the substrate configuration can be simplified.

According to the fourth lighting fixture of the present invention, it is possible to reduce the waste amount of the material for forming the radiator by dividing the radiator into a plurality of parts.

FIG. 1 is an exploded perspective view showing an example of the configuration of the lighting fixture of the present invention. FIG. 2 is a side perspective view showing an example of the configuration of the lighting fixture of the present invention. FIG. 3 is a side perspective view showing the first lighting fixture of the present invention. FIG. 4 (a) is a side perspective view showing the second lighting fixture of the present invention, and FIG. 4 (b) is a side perspective view for explaining the movement of light in the second lighting fixture of the present invention. .

Hereinafter, the lighting apparatus of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to the following description. In addition, in the following FIGS. 1-4, the same code | symbol is attached | subjected to the same part and the description may be abbreviate | omitted. In the drawings, for convenience of explanation, the structure of each part may be simplified as appropriate, and the dimensional ratio of each part may be schematically shown, unlike the actual case.

[Embodiment 1]
FIG. 1 is an exploded perspective view showing an example of the configuration of the lighting fixture of the present invention. FIG. 2 is a side perspective view showing the lighting apparatus of the present invention. As shown in FIGS. 1 and 2, the lighting apparatus 100 of the present example includes a main body 10, a power supply device 20, a reflector 30, an annular radiator (heat sink) 40, an annular substrate 50, and a plurality of substrates. The LED element 51 and an annular diffusion cover 60 are included.

The main body 10 has a hanging part 11 in the upper center part, and the lower part is open. The hanging part 11 has an electric cord inside. In FIG. 1, the main body 10 has a cylindrical shape, but may have other shapes such as a quadrangular prism shape, and the same applies to the hanging portion 11. Further, the reflecting plate 30, the radiator 40, the substrate 50, and the diffusion cover 60 are not limited to a disk shape and an annular shape, and may have other shapes such as a rectangular plate and a square annular shape. As the main body 10, a known pendant light main body may be used.

The power supply device 20 is disposed inside the opening of the main body 10. As the power supply device 20, a known pendant light power supply device may be used.

The reflector 30 is disposed so as to cover the entire opening of the main body 10. Details of the reflector 30 will be described later.

The annular radiator 40 is disposed on the lower peripheral portion of the reflector 30. As a material for forming the radiator 40, for example, metals such as aluminum and its alloys, magnesium and its alloys, copper and its alloys can be used. Further, the material for forming the radiator 40 may be, for example, a resin containing a high thermal conductive filler. Examples of the resin include polycarbonate, nylon, PBT (polybutylene terephthalate), PPS (polyphenylene sulfide), and the like. The shape of the radiator 40 may be a single annular plate, but as shown in FIG. 1, it is formed into an annular plate by combining a plurality of (four in FIG. 1) divided plates. It is preferable. This reason will be described in the fourth embodiment.

The annular substrate 50 is disposed on the lower surface of the radiator 40. The substrate 50 may be a single annular plate, or may be formed into an annular plate by combining a plurality of (eight in FIG. 1) plates as shown in FIG. A known LED substrate may be used as the substrate 50.

The plurality of LED elements 51 are arranged on the lower surface of the substrate 50. The LED element 51 is not particularly limited, and a conventionally known LED element can be used, but a white LED is preferable. For example, the LED element 51 may be included in a silicone resin or the like, and a phosphor may be dispersed in the silicone resin. In such a form, for example, white light can be obtained by using the LED element 51 as a blue LED and the phosphor as a combination of a yellow phosphor or a red / green phosphor. Further, white light can also be obtained by making the LED element 51 a near-ultraviolet LED (UV-LED) and using the phosphor as a combination of red, green and blue phosphors (RGB phosphor). The configuration of the substrate 50 is not particularly limited as long as a plurality of LED elements 51 are arranged on the lower surface, but as shown in FIG. 1, the LED elements 51 are arranged in two rows on the lower surface. Preferably they are arranged to form a row. In FIG. 1, 32 LED elements 51 are arranged in the inner annular row, and 64 LED elements 51 are arranged in the outer annular row. However, FIG. 1 is merely an example, and the number of LED elements 51 is not limited to the example shown in FIG.

The annular diffusion cover 60 is disposed below the substrate 50 so as to cover the LED element 51. Examples of a material for forming the diffusion cover 60 include a material having translucency such as acrylic resin, and a diffusive material exhibiting milky white.

The method of integrating the reflector 30, the radiator 40, the substrate 50, and the diffusion cover 60 is not particularly limited, and adjacent members may be fixed, or the reflector 30 and the diffusion cover 60 may be fixed. A heat radiator 40 and a substrate 50 may be interposed between them. The fixing means is not particularly limited, and may be fixed using screws or the like, for example.

Next, with reference to FIG. 3, the details of the reflector 30 of the lighting fixture 100 (first lighting fixture) of the present embodiment will be described. In the present embodiment, the reflector 30 includes a central portion 31 that is convex downward, and an insulating holding portion 32 that has a constant distance from the lower end of the main body 10 located on the outer peripheral side of the central portion 31. And a projecting portion 33 projecting toward the main body 10 located on the outer peripheral side of the insulating holding portion 32.

The reflector 30 is fixed to the main body 10 by the fixing means at the protrusion 33. The fixing means is not particularly limited, and may be fixed with screws or the like, for example.

The material for forming the reflector 30 is not particularly limited, and for example, a general steel plate material may be used. The reflecting plate 30 can be manufactured by a known method such as press working or punching, for example.

As shown in FIG. 3, according to the lighting fixture 100 of the present embodiment, since the reflector 30 has the insulating holding portion 32, high insulation is provided between the power supply device 20 and the substrate 50 on which the LED elements 51 are arranged. Sex can be secured. Moreover, as shown in FIG. 3, according to the lighting fixture 100 of the present embodiment, the reflector 30 has the protrusion 33, so that a cavity is formed in a part of the upper surface of the radiator 40, And a heat dissipation area can be enlarged and the heat dissipation effect increases.

[Embodiment 2]
FIG. 4A shows a lighting fixture (second lighting fixture) of the present embodiment. The lighting fixture 100 of the present embodiment is the same as the lighting fixture of the first embodiment except for the reflector 30 and the diffusion cover 60. In the lighting fixture 100 of this embodiment, the reflecting plate 30 includes a central portion 31 that is convex downward, and an outer peripheral portion that is located on the outer peripheral side of the central portion 31. In FIG. 4A, the outer peripheral portion is the same as the insulating holding portion 32 and the protruding portion 33 as in the lighting fixture of the first embodiment, but in this embodiment, the shape of the outer peripheral portion is the entire opening of the main body 10. If it can cover, it will not specifically limit, The shape other than shown to Fig.4 (a) may be sufficient. Moreover, in the lighting fixture 100 of this embodiment, the diffusion cover 60 has the emission part 61 which radiate | emits the light which the LED element 51 light-emitted to the reflecting plate 30 side.

The central portion 31 of the reflecting plate 30 includes a first curved surface portion 31b that protrudes inward (reverse R when viewed from below) located on the outer peripheral portion side, and an outer surface that is located closer to the center side than the first curved surface portion 31b. And a second curved surface portion 31a that is convex (positive R when viewed from below). As shown by an auxiliary line in FIG. 4A, the intersection X of the first curved surface portion 31a and the second curved surface portion 31b and the lower end of the emitting portion 61 of the diffusion cover 60 are substantially the same height. .

Next, with reference to FIG.4 (b), the motion of the light in the lighting fixture 100 of this embodiment is demonstrated. According to the lighting apparatus 100 of the present embodiment, a part of the light emitted from the emission part 61 of the diffusion cover 60 among the light emitted by the LED element 51 indicated by the broken arrow is reflected as indicated by the solid arrow. The first curved surface portion 31b of the plate 30 is reflected by the central portion of the reflecting plate 30, and the light emission state at the central portion of the reflecting plate 30 can be made more uniform.

[Embodiment 3]
With reference to FIG.1 and FIG.3, the lighting fixture (3rd lighting fixture) of this embodiment is demonstrated. The lighting fixture 100 of the present embodiment is different in that the configuration of the substrate 50 is different and the outer peripheral side includes a protruding portion 33 protruding toward the main body 10 and can cover the entire opening of the main body 10. Except for the point that the shape of the plate 30 is not limited to the example shown in FIG. 3, it is the same as the lighting apparatus of the first embodiment. In the lighting fixture 100 of the present embodiment, the plurality of LED elements 51 are arranged so as to form two annular rows on the lower surface of the substrate 50. Moreover, in the lighting fixture 100 of this embodiment, the thermal pad which the LED element 51 of the cyclic | annular row | line | column of an outer peripheral side conduct | electrically_connects with the electrode (cathode or anode) of the outer peripheral side near the location where the reflector 30 and the heat radiator 40 contact. (Not shown). At this time, whether the outer peripheral electrode is a cathode or an anode is selected according to the type of the LED element 51. In other words, if the LED element 51 can reduce the temperature by conducting the cathode and the thermal pad, the outer peripheral electrode is used as the cathode. On the other hand, if the LED element 51 can reduce the temperature by conducting the anode and the thermal pad, the electrode on the outer peripheral side is used as the anode. As illustrated in FIG. 1, the LED elements 51 in the annular array on the outer peripheral side, in which the number of LED elements 51 generally increases, have a thermal pad, so that the heat dissipation effect can be enhanced. Moreover, according to the lighting fixture 100 of this embodiment, the structure of the board | substrate 50 can also be simplified.

In the lighting apparatus 100 of the present embodiment, the LED elements 51 in the annular row on the inner peripheral side may further have a thermal pad. In consideration of the improvement of the heat dissipation effect, in the LED element 51 in the annular array on the inner peripheral side, the thermal pad may be connected to the electrode on the center side near the location where the reflector 30 and the radiator 40 are in contact. preferable. On the other hand, when considering the simplification of the configuration of the substrate 50, in the LED element 51 in the inner annular ring, the thermal pad is connected to the electrode on the outer peripheral side in the same manner as the LED element 51 in the outer annular ring. It is preferable to conduct.

[Embodiment 4]
With reference to FIG. 1, the lighting fixture (4th lighting fixture) of this embodiment is demonstrated. The lighting fixture 100 of the present embodiment is the same as the lighting fixture of the first embodiment except that an annular radiator 40 is formed by connecting a plurality of (four in FIG. 1) divided plates. It is. By dividing the radiator 40 into a plurality, it is possible to reduce the amount of waste of the material forming the radiator 40 as compared with the case where the radiator 40 is manufactured as a single annular plate.

As mentioned above, although the lighting fixture of this invention was divided into four embodiment and demonstrated, the lighting fixture of this invention may combine the characteristic of arbitrary two or more embodiment.

As mentioned above, although this invention was demonstrated with reference to embodiment, this invention is not limited to the said embodiment. Various changes that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the present invention.

This application claims priority based on Japanese Patent Application No. 2013-094122 filed on April 26, 2013, the entire disclosure of which is incorporated herein.

According to the present invention, it is possible to provide a technically superior lighting fixture. The lighting fixture of the present invention can be used for a wide range of applications such as indoor lighting.

DESCRIPTION OF SYMBOLS 10 Main body 11 Suspension part 20 Power supply device 30 Reflector 31 Central part 31a 2nd curved surface part 31b 1st curved surface part 32 Insulation holding | maintenance part 33 Projection part 40 Radiator 50 Substrate 51 LED element 60 Diffusion cover 61 Output part X Intersection

Claims

A main body having a hanging part in the upper center part and having a lower part opened;
A power supply device disposed inside the center of the opening of the main body;
A reflector arranged to cover the entire opening of the body;
An annular radiator disposed in the lower peripheral portion of the reflector;
An annular substrate disposed under the radiator;
A plurality of LED elements disposed on the lower surface of the substrate;
An annular diffusion cover disposed under the substrate so as to cover the LED element,
The reflector is
A central portion that is convex downward,
An insulating holding portion having a constant distance from the lower end of the main body located on the outer peripheral side of the central portion;
Including a protruding portion protruding toward the main body located on the outer peripheral side of the insulating holding portion,
The lighting apparatus, wherein the main body and the protruding portion of the reflecting plate are fixed by a fixing means.
A main body having a hanging part in the upper center part and having a lower part opened;
A power supply device disposed inside the center of the opening of the main body;
A reflector arranged to cover the entire opening of the body;
An annular radiator disposed in the lower peripheral portion of the reflector;
An annular substrate disposed under the radiator;
A plurality of LED elements disposed on the lower surface of the substrate;
An annular diffusion cover disposed under the substrate so as to cover the LED element,
The reflector is
A central portion that is convex downward,
Including an outer peripheral portion located on the outer peripheral side of the central portion,
The diffusion cover is
An emission part for emitting the light emitted from the LED element to the reflector side;
The central part of the reflector is
An inwardly convex first curved surface portion located on the outer peripheral portion side;
An outwardly convex second curved surface portion located closer to the center than the first curved surface portion,
An illuminating device, wherein an intersection of the first curved surface portion and the second curved surface portion and a lower end of an emission portion of the diffusion cover are substantially the same height.
A main body having a hanging part in the upper center part and having a lower part opened;
A power supply device disposed inside the center of the opening of the main body;
A reflector arranged to cover the entire opening of the body;
An annular radiator disposed in the lower peripheral portion of the reflector;
An annular substrate disposed under the radiator;
A plurality of LED elements disposed on the lower surface of the substrate;
An annular diffusion cover disposed under the substrate so as to cover the LED element,
The reflector includes a protruding portion protruding on the outer peripheral side toward the main body side,
The plurality of LED elements are arranged to form two or more annular rows on the lower surface of the substrate,
The lighting device, wherein the LED elements in the annular array on the outer peripheral side have a thermal pad that is electrically connected to an electrode on the outer peripheral side near a position where the reflector and the radiator are in contact with each other.
A main body having a hanging part in the upper center part and having a lower part opened;
A power supply device disposed inside the center of the opening of the main body;
A reflector arranged to cover the entire opening of the body;
An annular radiator disposed in the lower peripheral portion of the reflector;
An annular substrate disposed under the radiator;
A plurality of LED elements disposed on the lower surface of the substrate;
An annular diffusion cover disposed under the substrate so as to cover the LED element,
The said heat radiator is divided | segmented into plurality, The lighting fixture characterized by the above-mentioned.