JP2021089863A - Luminaire - Google Patents

Abstract

To improve the heat dissipation performance of a luminaire.SOLUTION: A luminaire 1 comprises: a light emitting module 4 provided on one surface side of a base part 20, and comprising a board 42 on which a light emitting element 41 is mounted; a plurality of heat dissipating fins 21 provided on the other surface side opposite to the one surface side of the base part 20, and dissipating heat generated from the light emitting element 41; and a support metal fitting 6 arranged so as to cover at least a portion of an outer periphery of the base part 20. In the plurality of heat dissipating fins 21, each of first end parts extending toward the support metal fitting 6 is arranged in contact with the support metal fitting 6.SELECTED DRAWING: Figure 3

Description

The present disclosure relates to luminaires.

In recent years, a light source using a light emitting element has become widespread in a lighting fixture attached to a mounted portion such as a ceiling. Then, in such a lighting fixture, there is one that uses some kind of heat dissipation means in order to dissipate heat from the light emitting element.

For example, as described in Patent Document 1, a lighting fixture provided with a light emitting element as a light source is provided with heat radiation fins for dissipating heat emitted from the light emitting element. In Patent Document 1, such a lighting fixture is referred to as a lighting device. In this luminaire, a plurality of lighting units having a substrate on which a light emitting element is mounted on one surface side and heat radiation fins provided on the other surface side of the substrate to dissipate heat emitted from the light emitting element are fixed to a fixed frame. Has been done. Further, the fixed frame is provided with a power supply device and a mounting member. Then, the luminaire configured in this way is installed in a mounted portion such as a ceiling via a mounting member.

Japanese Patent No. 6272447

By the way, in the lighting equipment described in Patent Document 1, the heat dissipation performance of the heat radiation fins is improved by forming a space between the heat radiation fins and surrounding parts. In order to improve the heat dissipation performance of the lighting equipment, it is necessary not only to provide heat dissipation fins on the opposite side of the substrate on which the light emitting element, which is the source of heat, is arranged, but also to study the arrangement and add parts. .. Therefore, it is desired to realize a technique capable of improving heat dissipation performance. Therefore, the present inventor has come to devise the present invention by paying attention to the space between the heat radiation fin and the surrounding parts.

The present disclosure aims to solve the above-mentioned problems, and provides a lighting fixture capable of improving heat dissipation performance.

The luminaire according to the present disclosure includes a base portion as a base, a light emitting module provided on one surface side of the base portion and having a substrate on which a light emitting element is mounted, and a light emitting module opposite to the one surface side of the base portion. The plurality of heat radiation fins provided on the surface side and provided with a plurality of heat radiation fins for dissipating heat generated from the light emitting element and support metal fittings arranged so as to cover at least a part of the outer periphery of the base portion. Is arranged so that each of the first end portions extending toward the support fitting is in contact with the support fitting.

According to the luminaire according to the present disclosure, the heat radiation fins arranged on the side opposite to the light emitting module mounting side of the base portion are arranged so that the end portion on the support metal fitting side comes into contact with the support metal fitting. In addition, since the base and heat dissipation fins function as heat sinks and the ends of the heat dissipation fins are in contact with the support metal fittings, the heat generated from the light emitting element can be transferred to the support metal fittings, improving heat dissipation performance. Can be planned.

It is a perspective view which shows the lighting equipment which concerns on Embodiment 1. FIG. It is a perspective view which shows the state which removed the cover of the luminaire of FIG. It is an exploded perspective view which shows the luminaire of FIG. It is a front view which shows the lighting fixture of FIG. It is explanatory drawing which shows the lighting fixture of FIG. 4 as seen from the AA direction. It is explanatory drawing which shows the main part in the luminaire of FIG. 5 in an enlarged manner.

Hereinafter, embodiments of the luminaire according to the present invention will be described with reference to the drawings. The lighting equipment according to the present invention is not limited to the embodiments described below. Further, in the drawings below, the relationship between the sizes of the constituent members may differ from the actual one. Further, in the following description, terms indicating directions are appropriately used for ease of understanding, but these terms are for explanation purposes only and do not limit the lighting equipment. Examples of the term indicating the direction include "top", "bottom", "right", "left", "front", "rear", and the like. Further, in each of the drawings described below, the Z axis indicates the vertical direction, the X axis indicates the horizontal direction, that is, the horizontal direction, and the Y axis indicates the front-rear direction, that is, the depth direction. The X-axis, Y-axis, and Z-axis are orthogonal to each other, the X-axis and the Y-axis are in the horizontal direction, and the Z-axis is in the vertical direction. Further, in the following description, parts or parts having the same configuration are designated by the same reference numerals, and the description thereof will be omitted as appropriate.

Embodiment 1.
FIG. 1 is a perspective view showing a lighting fixture 1 according to a first embodiment. FIG. 2 is a perspective view showing a state in which the cover 7 of the lighting fixture 1 of FIG. 1 is removed. FIG. 3 is an exploded perspective view showing the luminaire 1 of FIG. FIG. 4 is a front view showing the lighting fixture 1 of FIG. FIG. 5 is an explanatory view showing the lighting fixture 1 of FIG. 4 as viewed from the direction AA. FIG. 6 is an enlarged explanatory view showing a main part B in the lighting fixture 1 of FIG.

<Overall configuration of lighting equipment 1>
First, the overall configuration of the lighting fixture 1 according to the first embodiment will be described with reference to FIGS. 1 to 3. As shown in FIGS. 1 to 3, the luminaire 1 of the first embodiment is roughly divided into a light source unit 2 and an arm 3 for attaching the light source unit 2 to a mounted portion such as a ceiling or a beam. , Is equipped. The luminaire 1 is installed by attaching the arm 3 to a mounted portion such as a high ceiling using a fixture such as a bolt (not shown). Next, the configuration of each part of the luminaire 1 will be described with reference to FIGS. 1 to 4.

<Light source unit 2>
The light source unit 2 includes a base portion 20, a light emitting module 4 provided on one surface side of the base portion 20, and a plurality of heat radiation fins 21 provided on the other surface side opposite to the one surface side of the base portion 20. The top plate portion 22 is provided so as to face the base portion 20 via the heat radiation fin 21 of the above. Further, the light source unit 2 is provided on the top plate portion 22 and is arranged so as to cover a part of the outer periphery of the power supply device 5 for supplying electric power to the light emitting module 4 and the base portion 20 and the top plate portion 22. A support metal fitting 6 for connecting the portion 20 and the top plate portion 22 is provided.

(Light emitting module 4)
As shown in FIG. 2, the light emitting module 4 arranged on one side of the base portion 20 as a base is provided on one side of the base portion 20 and has a substrate 42 on which a plurality of light emitting elements 41 are mounted. The substrate 42 is made of aluminum or resin. Further, the light emitting module 4 includes a connector 44 for transmitting the electric power supplied from the power supply device 5 via the internal wiring 43 to the plurality of light emitting elements 41. The internal wiring 43 is connected to the power supply board 54 (see FIG. 3) and the connector 44, which will be described later, of the power supply device 5.

The light emitting element 41 is composed of, for example, a surface mount type LED element, but may be a COB type LED module. Further, the light emitting element 41 may be a solid-state laser element, a semiconductor laser element, or an organic EL element. Further, although the example in which the light emitting elements 41 are provided radially from the center of the substrate 42 is shown, the present invention is not limited to this, and the light emitting elements 41 may be provided in a plurality of rows in the X-axis direction and the Y-axis direction, respectively.

(Cover 7)
Further, as shown in FIGS. 1 and 3, a cover 7 is arranged on one surface side of the base portion 20 so as to cover the light emitting module 4. The cover 7 is formed in the same area as the one surface side of the base portion 20, and has a convex shape protruding downward on the Z axis. The cover 7 emits light by a manufacturing method such as extrusion molding, injection molding or laminated molding using a translucent synthetic resin material such as milky white acrylic resin, PC (polycarbonate) or PMMA (polymethyl methacrylate resin). It is formed so as to cover the module 4. The cover 7 preferably has high transparency for efficiently transmitting the light emitted from the light emitting module 4. Further, the cover 7 can suppress the brightness of each light emitting element 41 by using a diffusible material. That is, the cover 7 is arranged so as to cover the light emitting module 4, and functions as a light transmitting portion that diffuses and transmits the light emitted from the light emitting element 41. Then, the cover 7 is fixed to one side of the base portion 20 by the screw 71, that is, downward in the Z-axis direction, and is also fixed to the base portion 20 by co-tightening with the support metal fitting 6 by the screw 63 described later.

(Power supply device 5)
As shown in FIGS. 1 to 4, the power supply device 5 is arranged in a state of being in surface contact with the other surface side opposite to the one surface side in contact with the heat radiation fin 21 of the top plate portion 22. The power supply device 5 includes a power supply case top 51 and a power supply case bottom 53 provided with a terminal block 52. The terminal block 52 is connected to a power supply line (not shown), and supplies electric power to the power supply board 54 from the outside via the power supply line. Further, the power supply board 54 is connected to the internal wiring 43, and power is supplied to the plurality of light emitting elements 41 via the internal wiring 43 and the connector 44. The power supply board 54 is housed in the power supply case bottom 53. The power supply case bottom 53 on which the power supply board 54 and the terminal block 52 are arranged is covered with a power supply case top 51 having a terminal block cover 55, except for a connection portion (not shown) into which the power supply line of the terminal block 52 is inserted. , It is prevented from being exposed from the outer shell. Further, the terminal block cover 55 prevents the connection portion into which the power supply line of the terminal block 52 is inserted from being exposed, thereby preventing electric shock or external fire spread due to contact with the connection portion due to dustproof or ignition of the connection portion. There is.

(Support bracket 6)
The support metal fitting 6 is made of a flat plate-shaped member such as an aluminum or magnesium alloy having excellent heat dissipation, and is formed in a U shape having bent portions 62a and 62b formed by bending at both ends in the longitudinal direction of the flat surface portion 61. ing. In the support metal fitting 6, the bent portion 62a is fixed to the base portion 20 together with the cover 7 by the screw 63, and the bent portion 62b is fixed to the top plate portion 22 together with the power supply case bottom 53 of the power supply device 5 by the screw 64. Further, the support metal fitting 6 is provided with a nut 65 by press fitting on the flat surface portion 61, and the arm 3 is fixed by the bolt 31a. In this way, the support metal fitting 6 is arranged so as to cover the outer periphery of the base portion 20 and the top plate portion 22, and connects the base portion 20 and the top plate portion 22 via a plurality of heat radiation fins 21. ..

(Heat sink 8)
As shown in FIGS. 1 and 2, a plurality of heat radiation fins 21 are provided on the other surface side of the base portion 20. The plurality of heat radiating fins 21 dissipate heat generated from the light emitting element 41. The base portion 20 and the plurality of heat radiating fins 21 are each made of a material having excellent heat radiating properties such as aluminum or magnesium alloy. Then, these base portions 20 and the plurality of heat radiating fins 21 function as heat sinks 8 that radiate heat generated by the light emitting module 4 (indicated by white arrows pointing upward in the Z-axis direction in FIG. 4).

In the case of the first embodiment, as shown in FIGS. 4 and 5, the plurality of heat radiation fins 21 are arranged at equal intervals radially starting from the central portion C on the other surface side of the base portion 20. By arranging the plurality of heat radiating fins 21 in this way, the surface area of each heat radiating fin 21 is widened, and the heat generated by the light emitting module 4 provided on one surface side of the base portion 20 (Z-axis direction in FIG. 4). (Indicated by the white arrow pointing upward) can be efficiently dissipated.

Further, the plurality of heat radiation fins 21 are formed in a flat shape by bending the end portions 21a on the outer peripheral side. Then, each of the planar end portions 21a, which are the first end portions of the heat radiation fins 21 extending toward the support metal fittings 6 among the plurality of heat radiation fins 21, is the inner surface side of the flat surface portion 61 of the support metal fittings 6. Placed in contact. As a result, the contact area between each heat radiation fin 21 and the support metal fitting 6 can be increased, and the conduction efficiency of conducting the heat of the light emitting module 4 transmitted to the plurality of heat radiation fins 21 to the support metal fitting 6 is improved, and heat is dissipated. It is possible to improve the sex. In addition, the plurality of heat radiating fins 21 are arranged in direct contact with the supporting metal fitting 6 which is a peripheral component in the X-axis direction without passing through an extra space. As a result, the dimension (width) of the light source unit 2 and, by extension, the entire lighting fixture 1 in the X direction can be suppressed, and the lighting fixture 1 can be made smaller and lighter. As shown in FIG. 5, by forming the base portion 20 into a square in a plan view, the dimensions in the Y-axis direction can be suppressed, and the volume of the luminaire 1 can be reduced, and the size and weight can be further reduced. It will be possible. Moreover, since the end portion 21a of the plurality of heat radiating fins 21 that contacts the inner surface side of the flat surface portion 61 of the support metal fitting 6 is flat, the radiating fins 21 are reinforced only by contacting the flat surface portion 61. It functions as a material and can improve the fixing strength.

In the case of the first embodiment, the end portions 21a of the plurality of heat radiating fins 21 are formed in a flat shape to increase the contact area with the support metal fitting 6 and promote the heat radiating effect. This does not apply when the amount of heat generated in the heat generating portion of 4 and the power supply device 5 is small. That is, when the amount of heat generated by the heat generating portion is small, the linearly extended tip may be brought into contact with the support metal fitting 6 as it is without bending the end portions 21a of the plurality of heat radiating fins 21 to form a flat surface. Good. In this case, since the material of each heat radiation fin 21 is reduced by the amount that the end portion 21a is not bent to form a flat surface, further weight reduction can be achieved.

Further, the plurality of heat radiating fins 21 are formed with holes 21c penetrating the front and back surfaces of the heat radiating fins 21 in the bent portion 21b on the outer peripheral side where the end portion 21a is formed. Here, as shown in FIG. 5, the heat generated from the light emitting module 4 tends to be high in the central portion C of the heat sink 8. At this time, as shown by the broken line arrows in FIGS. 5 and 6, heat flows in the X-axis direction and the Y-axis direction due to the convection of air, but the flat end portion 21a formed by bending is convected. May block. Therefore, by providing the holes 21c in the plurality of heat radiation fins 21, the heated air flowing from the central portion C can be efficiently discharged to the outside through the holes 21c. As shown in FIG. 4, the shape of the hole 21c may be a rectangular shape, a circular shape, an elliptical shape, or the like. Further, the holes 21c may be provided at one place for one heat radiating fin 21, or may be provided at a plurality of places as appropriate according to the dimension (height) of the heat radiating fin 21 in the Z-axis direction.

Each of the plurality of heat radiating fins 21 has a tubular hole (not shown) formed by pressing on the end surface located on the base portion 20 side. Further, on the other surface side of the base portion 20, a tubular protrusion (not shown) is formed by pressing. Then, a plurality of heat radiation fins 21 are arranged on the other surface side of the base portion 20, and the tubular protrusions of the base portion 20 are passed through the tubular holes of the heat radiation fins 21 to apply pressure by a method such as pressing. As a result, as shown in FIG. 5, a caulked portion 21d due to plastic deformation is formed, and a plurality of heat radiation fins 21 are fixed to the other surface side of the base portion 20. The fixing of the base portion 20 and the plurality of heat radiation fins 21 is not limited to the fixing by the caulking portion 21d. For example, it may be fixed by adhesion, fixed by screws, rivets, or the like, or the base portion 20 and the plurality of heat radiating fins 21 may be integrally fixed by casting.

The hole 21c has a high contribution rate of heat dissipation at a portion exposed to the outer shell, but a low contribution rate of heat dissipation at a location where it comes into contact with the support metal fitting 6. However, by using the hole 21c at the contact portion between the hole 21c and the support metal fitting 6 and fixing the hole 21c together with the support metal fitting 6 with screws, rivets, or the like, the adhesion and fixing strength to each other are further increased, and heat dissipation is achieved. Can be improved. At the same time, by improving the fixing strength, it is possible to prevent the support metal fitting 6 and the heat radiating fin 21 from being loosened by the caulking portion 21d due to mutual impact due to vibration.

The plurality of heat radiation fins 21 are arranged so that each of the end portions 21e, which are the second end portions extending toward the top plate portion 22, is in contact with the top plate portion 22. That is, the plurality of heat radiation fins 21 are directly fixed in the Z-axis direction between the base portion 20 and the top plate portion 22, which are peripheral parts, without passing through an excess space. As a result, the height of the light source unit 2 and the lighting fixture 1 as a whole can be suppressed, and the lighting fixture 1 can be miniaturized. Further, since the end portions 21e of the plurality of heat radiation fins 21 are in contact with the top plate portion 22, the heat generated from the power supply device 5 arranged on the top plate portion 22 (white in the Z-axis direction in FIG. 4). (Indicated by a pull-out arrow) can also dissipate heat through these plurality of heat radiation fins 21.

<Arm 3>
As shown in FIGS. 2 and 3, the arm 3 is fixed to the nut 65 of the flat surface portion 61 of the support metal fitting 6 connecting the base portion 20 and the top plate portion 22 by bolts 31a. The arm 3 is formed in a U shape having side surface portions 32 and 32 parallel to the flat surface portion 61 of the support metal fitting 6 and a top surface portion 33 connecting the side surface portions 32 and 32. A mounting hole 33a through which a bolt (not shown) is passed is formed through the top surface portion 33, and the lighting fixture 1 can be installed by being fixed to a mounted portion such as a ceiling by the bolt.

By the way, in recent years, in addition to general lighting fixtures attached to attached parts such as ceilings, lighting fixtures used in commercial facilities such as department stores or shopping centers, or lighting fixtures used in high ceiling spaces such as gymnasiums or halls also emit light. Light sources using elements have become widespread. In such a lighting fixture, since the mounted portion to be installed is a high ceiling or the like, it is desired to reduce the size and weight with a simple structure.

<Effect of Embodiment 1>
As described above, according to the lighting fixture 1 of the first embodiment, the base portion 20 and the heat radiating fins 21 function as heat sinks 8, and the end portions 21a or 21e of the radiating fins 21 support each other. It is in contact with the metal fitting 6 or the top plate portion 22. Therefore, in the luminaire 1, the heat generated from the light emitting element 41 and the power supply device 5 can be transferred to the support metal fitting 6 or the top plate portion 22, and the heat dissipation performance can be improved. Further, in the lighting fixture 1, the heat radiation fins 21 arranged on the other surface side of the base portion 20 are in contact with the top plate portion 22 at each of the end portions 21e on the top plate portion 22 side, and are on the support metal fitting 6 side. Each of the end portions 21a is arranged in contact with the support metal fitting 6. Therefore, no extra space is formed between the heat radiating fin 21, the top plate portion 22 which is a peripheral component, and the support metal fitting 6. Therefore, the size, that is, the area in the Z-axis direction connecting the base portion 20 and the top plate portion 22 in the luminaire 1 and the X-axis direction and the Y-axis direction toward the outer circumference of the base portion 20 and the top plate portion 22 is determined. Can be minimized. Along with this, the weight of the luminaire 1 can also be minimized. Thus, according to the lighting fixture 1 of the first embodiment, the heat dissipation performance can be improved, and the size and weight can be reduced.

1 Lighting equipment, 2 Light source unit, 3 Arm, 4 Light emitting module, 5 Power supply, 6 Support bracket, 7 Cover, 8 Heat sink, 20 Base, 21 Heat dissipation fin, 21a end, 21b Bending part, 21c hole, 21d caulking Part, 21e end, 22 top plate, 31a bolt, 32 side surface, 33 top surface, 33a mounting hole, 41 light emitting element, 42 board, 43 internal wiring, 44 connector, 51 power supply case top, 52 terminal block, 53 Power supply case bottom, 54 power supply board, 55 terminal block cover, 61 flat surface, 62a bent part, 62b bent part, 63 screws, 64 screws, 65 nuts, 71 screws, B main part, C center part.

Claims (4)

The base part as a base and
A light emitting module provided on one side of the base portion and having a substrate on which a light emitting element is mounted, and a light emitting module.
A plurality of heat radiating fins provided on the other surface side of the base portion opposite to the one surface side and dissipating heat generated from the light emitting element, and
A support metal fitting arranged so as to cover at least a part of the outer circumference of the base portion is provided.
The plurality of heat radiation fins
A luminaire in which each of the first ends extending toward the support fitting is arranged in contact with the support fitting. A top plate portion arranged to face the base portion via the plurality of heat radiation fins, and a top plate portion.
A power supply device provided on the top plate portion to supply electric power to the light emitting module, and
Further prepare
The support metal fitting is arranged so as to cover at least a part of the outer periphery of the base portion and the top plate portion, and connects the base portion and the top plate portion.
The plurality of heat radiation fins
The luminaire according to claim 1, wherein each of the second end portions extending toward the top plate portion is arranged in contact with the top plate portion. The plurality of heat radiation fins
It is arranged radially on the other side of the base portion.
The luminaire according to claim 1 or 2, wherein the end portion located on the outer peripheral side is bent and formed. The plurality of heat radiation fins
The luminaire according to claim 3, wherein at least one hole is formed at the end portion on the outer peripheral side that bends.

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