JP7332452B2 - lighting equipment - Google Patents

Description

The present disclosure relates to lighting fixtures.

2. Description of the Related Art In recent years, light sources using light-emitting elements have become popular in lighting fixtures that are attached to a mounting portion such as a ceiling. Some of such lighting fixtures use some kind of heat dissipation means to dissipate the heat from the light emitting elements.

For example, as described in Patent Literature 1, a lighting fixture having a light emitting element as a light source is provided with radiation fins for dissipating heat emitted from the light emitting element. In addition, in patent document 1, such a lighting fixture is called a lighting device. In this lighting fixture, a plurality of lighting units each having a substrate on which a light-emitting element is mounted on one side and heat dissipation fins provided on the other side of the substrate for dissipating heat emitted from the light-emitting element are fixed to a fixed frame. It is Also, the fixed frame is provided with a power supply device and a mounting member. The luminaire configured in this manner is installed on a mounting portion such as a ceiling via a mounting member.

Japanese Patent No. 6272447

By the way, in the lighting fixture described in Patent Literature 1, a space is formed between the heat radiation fins and surrounding components to improve the heat radiation performance of the heat radiation fins. In order to improve the heat dissipation performance of lighting fixtures, it is necessary not only to provide heat dissipation fins on the opposite side of the substrate where the light emitting elements that generate heat are arranged, but also to consider their placement and add parts. . Therefore, it is desired to realize a technique capable of improving the heat dissipation performance. Therefore, the inventor of the present invention focused on the space between the radiation fins and the surrounding components, and came up with the present invention.

An object of the present disclosure is to solve the above-described problems, and to provide a lighting fixture capable of improving heat dissipation performance.

A lighting fixture 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. a plurality of heat radiation fins provided on the surface side for radiating heat generated from the light emitting element; is arranged such that each of the first ends extending toward the support fitting is in contact with the support fitting.

According to the lighting fixture according to the present disclosure, the heat-dissipating fins arranged on the side opposite to the light-emitting module mounting side of the base portion are arranged such that the end portion on the side of the supporting metal fitting is in contact with the supporting metal fitting. In addition, the base portion and the heat radiation fins function as a heat sink, and the ends of the heat radiation fins are in contact with the support metal fittings, so that the heat emitted from the light emitting element can be transferred to the support metal fittings, thereby improving the heat radiation performance. can be planned.

1 is a perspective view showing a lighting fixture according to Embodiment 1; FIG. 2 is a perspective view showing a state in which the cover of the lighting fixture of FIG. 1 is removed; FIG. 2 is an exploded perspective view showing the lighting fixture of FIG. 1; FIG. 2 is a front view of the lighting fixture of FIG. 1; FIG. FIG. 5 is an explanatory view showing the lighting fixture of FIG. 4 as seen from the AA direction; 6 is an explanatory diagram showing an enlarged main part of the lighting fixture of FIG. 5; FIG.

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a lighting fixture according to the present invention will be described below with reference to the drawings. In addition, the lighting fixture which concerns on this invention is not limited by embodiment described below. Also, in the following drawings, the size relationship of each component may differ from the actual size. Also, in the following description, terms representing directions are used as appropriate for ease of understanding, but these terms are for the purpose of explanation and do not limit lighting fixtures. Directional terms include, for example, "up", "down", "right", "left", "front" or "back". In each figure described below, the Z-axis indicates the up-down direction, the X-axis indicates the left-right 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, the X-axis and Y-axis are horizontal, and the Z-axis is vertical. Furthermore, in the following description, the same reference numerals are given to parts or parts having the same configuration, and the description thereof will be omitted as appropriate.

Embodiment 1.
FIG. 1 is a perspective view showing a lighting fixture 1 according to Embodiment 1. FIG. 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 lighting fixture 1 of FIG. FIG. 4 is a front view showing the lighting device 1 of FIG. 1. FIG. FIG. 5 is an explanatory diagram showing the lighting fixture 1 of FIG. 4 as viewed from the AA direction. FIG. 6 is an explanatory diagram showing an enlarged main portion B of the lighting fixture 1 of FIG.

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

<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, a plurality of radiation fins 21 provided on the other surface side opposite to the one surface side of the base portion 20, and a plurality of and a top plate portion 22 that is arranged to face the base portion 20 with heat radiation fins 21 interposed therebetween. 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 peripheries of the power source device 5 that supplies power to the light emitting module 4, and the base portion 20 and the top plate portion 22. A support fitting 6 that connects 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 surface side of the base portion 20 as a base has a substrate 42 provided on one surface side of the base portion 20 and having a plurality of light emitting elements 41 mounted thereon. The substrate 42 is made of aluminum or resin. The light-emitting module 4 also includes a connector 44 for transmitting power supplied from the power supply device 5 through the internal wiring 43 to the plurality of light-emitting elements 41 . The internal wiring 43 is connected to a power supply substrate 54 (see FIG. 3) and the connector 44 of the power supply device 5, which will be described later.

The light emitting element 41 is configured by, 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, the light emitting elements 41 are illustrated as being radially provided from the center of the substrate 42, but are not limited to this, and may be provided in multiple rows in the X-axis direction and the Y-axis direction.

(Cover 7)
1 and 3, a cover 7 is arranged on one side of the base portion 20 so as to cover the light emitting module 4. As shown in FIGS. The cover 7 has the same area as the one surface of the base portion 20, and has a convex shape protruding downward along the Z axis. The cover 7 is made of translucent synthetic resin material such as opalescent acrylic resin, PC (polycarbonate), or PMMA (polymethyl methacrylate resin), and is made to emit light by extrusion molding, injection molding, or lamination molding. It is formed so as to cover the module 4 . The cover 7 preferably has a high transmittance that allows the light emitted from the light emitting module 4 to pass through efficiently. In addition, by using a diffusive material for the cover 7, it is possible to suppress the brightness of each light emitting element 41. FIG. That is, the cover 7 is arranged so as to cover the light emitting module 4 and functions as a translucent portion that diffuses and transmits the light emitted from the light emitting element 41 . The cover 7 is fixed to one side of the base portion 20 by screws 71, that is, downward in the Z-axis direction, and is also fixed to the base portion 20 by tightening together with the support metal fittings 6 by screws 63, which will be described later.

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

(Support bracket 6)
The support fitting 6 is made of a plate-like member having excellent heat dissipation such as aluminum or magnesium alloy, and is formed in a U-shape having bent portions 62a and 62b formed by bending at both ends of a flat portion 61 in the longitudinal direction. ing. The support metal fitting 6 has a bent portion 62 a fixed to the base portion 20 together with the cover 7 by screws 63 , and a bent portion 62 b fixed to the top plate portion 22 together with the power supply case bottom 53 of the power supply device 5 by screws 64 . Further, the supporting metal fitting 6 is provided with a nut 65 which is press-fitted to the flat 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 the plurality of heat radiating fins 21. .

(Heat sink 8)
A plurality of radiation fins 21 are provided on the other surface side of the base portion 20, as shown in FIGS. The plurality of heat dissipation fins 21 dissipate heat generated from the light emitting elements 41 . The base portion 20 and the plurality of heat radiating fins 21 are each made of a material having excellent heat radiation properties, such as aluminum or a magnesium alloy. The base portion 20 and the plurality of heat dissipation fins 21 function as a heat sink 8 that dissipates heat generated in 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 radiation fins 21 are arranged on the other surface side of the base portion 20 at equal intervals radially with the central portion C as a starting point. By arranging a plurality of heat radiation fins 21 in this manner, the surface area of each heat radiation fin 21 is widened, and the heat generated by the light emitting module 4 provided on one surface side of the base portion 20 (in the Z-axis direction in FIG. 4) (indicated by a white arrow pointing upward) can be efficiently dissipated.

In addition, the plurality of heat radiation fins 21 are formed in a flat shape by bending end portions 21a on the outer peripheral side. Each of the planar end portions 21 a , which are the first end portions of the heat radiation fins 21 extending toward the support metal fitting 6 among the plurality of heat radiation fins 21 , is aligned with the inner surface side of the flat surface portion 61 of the support metal fitting 6 . placed in contact. As a result, the contact area between each of the radiation fins 21 and the support metal fittings 6 can be increased, and the conduction efficiency of conducting the heat of the light emitting module 4 transmitted to the multiple heat radiation fins 21 to the support metal fittings 6 can be improved. It is possible to improve the quality. In addition, the plurality of radiating fins 21 are arranged in direct contact with the supporting metal fittings 6, which are peripheral components, in the X-axis direction without any extra space between them. This makes it possible to reduce the size (width) in the X direction of the light source unit 2 and thus of the lighting fixture 1 as a whole, thereby reducing the size and weight of the lighting fixture 1 . As shown in FIG. 5, by forming the base portion 20 in a square shape in plan view, the size in the Y-axis direction can be suppressed, and the volume of the lighting device 1 can be reduced, and the size and weight of the lighting device 1 can be further reduced. It becomes possible. Moreover, since the end portion 21a of the plurality of radiation fins 21 that contacts the inner surface side of the flat portion 61 of the support fitting 6 is planar, the radiation fin 21 is reinforced only by being in contact with the flat portion 61. It functions as a material and can improve the fixing strength.

In the case of Embodiment 1, by forming the end portions 21a of the plurality of heat radiation fins 21 into a flat shape, the contact area with the support fitting 6 is increased and the heat radiation effect is promoted. This is not the case when the amount of heat generated by the heat generating portions such as 4 and power supply device 5 is small. That is, when the amount of heat generated by the heat generating portion is small, the end portions 21a of the plurality of heat radiating fins 21 may not be bent to form a flat surface, and the linearly extending ends may be brought into contact with the support fitting 6 as they are. good. In this case, since the material of each radiating fin 21 is reduced by the amount corresponding to the fact that the end portion 21a is not bent to form a flat shape, further weight reduction can be achieved.

Furthermore, the plurality of heat radiation fins 21 are formed with holes 21c penetrating through the front and back of the heat radiation fins 21 in bent portions 21b on the outer peripheral side where the end portions 21a are formed. Here, the heat emitted from the light emitting module 4 tends to be high at the central portion C of the heat sink 8, as shown in FIG. At this time, as indicated by dashed arrows in FIGS. 5 and 6, heat flows in the X-axis direction and the Y-axis direction due to air convection. may block the Therefore, by providing the holes 21c in the plurality of radiating fins 21, the heated air flowing from the central portion C can be efficiently discharged to the outside through the holes 21c. The shape of the hole 21c may be rectangular as shown in FIG. 4, or may be circular or elliptical. Also, the hole 21c may be provided at one location for one radiation fin 21, or may be provided at a plurality of locations as appropriate according to the dimension (height) of the radiation fin 21 in the Z-axis direction.

Each of the plurality of radiating fins 21 has a cylindrical hole (not shown) formed by pressing in an end face located on the base portion 20 side. A cylindrical projection (not shown) is formed by pressing on the other surface of the base portion 20 . A plurality of radiating fins 21 are arranged on the other side of the base portion 20, the cylindrical projections of the base portion 20 are passed through the cylindrical holes of these radiating fins 21, and pressure is applied by a technique such as pressing. As a result, as shown in FIG. 5 , a crimped portion 21 d is formed by plastic deformation, and a plurality of radiating fins 21 are fixed to the other surface of the base portion 20 . Note that the fixing between the base portion 20 and the plurality of heat radiating fins 21 is not limited to the fixing by the crimped portion 21d. For example, fixing by adhesion, fixing by screws or rivets, or the like, or a configuration in which the base portion 20 and the plurality of heat radiating fins 21 are integrally fixed by casting may be used.

The hole 21c has a high heat radiation contribution rate at a portion exposed to the outer shell, but has a low heat radiation contribution rate at a portion in 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 it together with the support metal fitting 6 with screws, rivets, etc., the mutual adhesion and fixing strength are further increased, and the heat dissipation is improved. can be improved. At the same time, the improved fixing strength can prevent the support metal fitting 6 and the heat radiation fin 21 from being disengaged from the crimped portion 21d due to mutual impacts caused by vibration.

The plurality of heat radiation fins 21 are arranged such that each of the end portions 21 e that are the second ends extending toward the top plate portion 22 is in contact with the top plate portion 22 . That is, the plurality of radiating fins 21 are directly fixed to the base portion 20 and the top plate portion 22, which are peripheral components, in the Z-axis direction without intervening an excess space. As a result, the height of the light source unit 2 and thus the lighting fixture 1 as a whole can be reduced, and the size of the lighting fixture 1 can be reduced. In addition, since the end portions 21e of the plurality of radiating fins 21 are in contact with the top plate portion 22, the heat emitted from the power supply device 5 arranged on the top plate portion 22 (the white heat in FIG. 4 directed downward in the Z-axis direction). ) can also dissipate heat through these plurality of heat dissipating fins 21 .

<Arm 3>
2 and 3, the arm 3 is fixed by a bolt 31a to a nut 65 on the plane portion 61 of the support fitting 6 that connects the base portion 20 and the top plate portion 22. As shown in FIG. The arm 3 is formed in a U-shape having side portions 32 and 32 parallel to the plane portion 61 of the support fitting 6 and a top portion 33 connecting the side portions 32 and 32 . Mounting holes 33a through which bolts (not shown) pass are formed through the top surface portion 33, and the lighting apparatus 1 can be installed by being fixed to a mounting portion such as a ceiling with the bolts.

By the way, in recent years, in addition to general lighting fixtures that are attached to a mounting part such as a ceiling, lighting fixtures that are used in commercial facilities such as department stores or shopping centers, or in spaces with high ceilings such as gymnasiums or halls, have also been found to emit light. Light sources using elements are becoming popular. In such a lighting fixture, since the part to be mounted is a high ceiling or the like, it is desired to reduce the size and weight of the lighting fixture with a simple structure.

<Effect of Embodiment 1>
As described above, according to the lighting fixture 1 of Embodiment 1, the base portion 20 and the heat radiation fins 21 function as the heat sink 8, and the end portions 21a or 21e of the heat radiation fins 21 are respectively supported. It is in contact with the fitting 6 or the top plate portion 22 . Therefore, in the luminaire 1, the heat emitted from the light emitting element 41 and the power supply device 5 can be transmitted to the support bracket 6 or the top plate portion 22, thereby improving the heat radiation performance. Further, in the lighting device 1, the heat radiating fins 21 arranged on the other surface side of the base portion 20 are in contact with the top plate portion 22 at the ends 21e on the side of the top plate portion 22, and the heat radiation fins 21 on the side of the support metal fitting 6 are in contact with each other. Each of the end portions 21 a is arranged in contact with the support fitting 6 . Therefore, no extra space is formed between the heat radiating fins 21 and the top plate portion 22 and the support metal fittings 6 which are the surrounding components. Therefore, the Z-axis direction connecting the base portion 20 and the top plate portion 22 in the lighting device 1, and the size in the X-axis direction and the Y-axis direction toward the outer periphery of the base portion 20 and the top plate portion 22, that is, the area can be minimized. Moreover, along with this, the weight of the lighting fixture 1 can be minimized. Thus, according to the lighting fixture 1 of Embodiment 1, the heat radiation performance can be improved, and the size and weight can be reduced.

REFERENCE SIGNS LIST 1 luminaire 2 light source unit 3 arm 4 light emitting module 5 power supply device 6 support fitting 7 cover 8 heat sink 20 base portion 21 heat dissipation fin 21a end portion 21b bent portion 21c hole 21d caulking Part 21e End 22 Top Plate 31a Bolt 32 Side 33 Top 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 part, 62a Bent part, 62b Bent part, 63 Screw, 64 Screw, 65 Nut, 71 Screw, B Main part, C Central part.

Claims (4)

a base portion as a base;
a light-emitting module provided on one side of the base portion and having a substrate on which a light-emitting element is mounted;
a plurality of radiating fins provided on the other surface side opposite to the one surface side of the base portion for dissipating heat generated from the light emitting element;
a support fitting arranged to cover at least a part of the outer circumference of the base,
The plurality of heat dissipation fins are
A luminaire, wherein each first end extending toward the support fitting is placed in contact with the support fitting. a top plate portion arranged to face the base portion with the plurality of heat radiation fins interposed therebetween;
a power supply device provided on the top plate portion for supplying power to the light emitting module;
further comprising
The support fitting is arranged 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 dissipation fins are
2. The luminaire of claim 1, wherein each of the second ends extending toward the top plate is disposed in contact with the top plate. The plurality of heat radiation fins are
are arranged radially on the other surface side of the base portion,
3. The luminaire according to claim 1, wherein the end located on the outer peripheral side is bent. The plurality of heat radiation fins are
4. The lighting fixture according to claim 3, wherein at least one hole is formed in the curved end on the outer peripheral side.

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