JP2003092022A - Heat radiation structure of lighting device, and lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat radiation structure of a lighting device, and the lighting device enabling to display a heat radiation function of high grade and lengthen the life of an LED lamp and the like, and enabling to obtain an excellent illumination for a long period of time. SOLUTION: The lighting device comprises a light source board like an LED board on which, light sources like LED lamps are mounted, and a base body having a setting surface to which, the light source board is mounted. For the lighting device or the heat radiation structure of the same, the light source board is fixed to the base body by turning a surface of the light source board, opposite to the surface on which the light sources are mounted, into a mounting surface, and by making a subscribed area of the setting surface and the mounting surface almost closely contact with each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a heat dissipation structure for a lighting fixture and a lighting fixture using an LED lamp as a light source.

[0002]

2. Description of the Related Art In recent years, luminaires using LED lamps as a light source have been proposed in place of incandescent lamps and fluorescent lamps. However, the life of LED lamps is greatly affected by the temperature condition, and the life is dramatically increased at high temperatures. Since it becomes very short, it is extremely important to improve the heat dissipation function in such a lighting fixture. LED lamp life is, for example, 1
The temperature difference of 0 ℃ doubles the life, and the LED lamp with a life of 1000 hours at 120 ℃ is 6 ℃ at 60 ℃.
It has a life of 4000 hours.

And as a known technique related to the improvement of the heat dissipation function of a lighting fixture using an LED lamp as a light source,
There is a lighting device disclosed in JP 2001-155536 A. In the lighting device, the LED lamp is arranged in a case while ensuring a predetermined directivity direction, and a heat radiator such as a silicon rubber for a heat sink is filled in the case to provide the LE.
It is characterized in that the D lamp is embedded in the heat radiator with the light emitting portion protruding.

[0004]

By the way, in a lighting fixture using an LED lamp as a light source, the shape of the lighting fixture is
From the viewpoints of size / structure, cost, etc., it is difficult to embed the LED lamp in the heat radiator as described above, and it is difficult to extend the life of the LED lamp in such a lighting fixture. In order to extend the life of the LED lamp as a light source and obtain good illumination over a long period of time, even in such a lighting device, a heat dissipation structure capable of improving the heat dissipation function is desired.

The present invention has been made in view of the above problems, and it is, for example, a case where it is difficult to embed an LED lamp in a radiator from the viewpoint of the shape, size, structure, cost, etc. of a lighting fixture. Also, it is possible to exhibit a high heat dissipation function, to extend the life of a light source such as an LED lamp, and to provide a heat dissipation structure of a lighting fixture and a lighting fixture which can obtain good lighting for a long period of time. To aim.

[0006]

A heat dissipation structure for a lighting fixture or a lighting fixture according to the present invention comprises a light source substrate on which a light source is arranged,
The light source board has a base body provided on an installation surface, and the surface of the light source board opposite to the side where the light source is provided is a mounting surface, and the installation surface and a predetermined region of the mounting surface are substantially in close contact with each other. The light source substrate is fixed to the base body. The mounting surface of the light source board and the mounting surface of the base body are almost in close contact, and the heat generated in the light source board is conducted to the base body by heat conduction to dissipate the heat, preventing the light source and the light source board from becoming hot and extending the life of the light source Can be achieved.

Furthermore, the heat dissipation structure of the luminaire or the luminaire of the present invention is characterized in that the light source is an LED lamp and the light source substrate is an LED substrate. The heat dissipation structure according to the present invention can be applied to an appropriate luminaire in which a light source is arranged on a light source board, and particularly when applied to an LED board on which an LED lamp is arranged, the life of the LED lamp is reduced. It is preferable because it can be dramatically prolonged.

Further, the heat dissipation structure of the luminaire or the luminaire of the present invention is characterized in that the base body and the light source substrate are formed of aluminum or an aluminum alloy. The material of the substrate and the light source substrate may be the same material or different materials as long as good heat conduction is possible, but aluminum and aluminum alloys are light weight, low cost, workability, corrosion resistance Since it has excellent mechanical properties and high thermal conductivity, it is preferable to use aluminum or an aluminum alloy as the material of the base body, the light source board, or both because it is possible to further improve the heat dissipation function. is there.

Further, the lighting equipment of the present invention has a light source substrate on which a light source is disposed and a base body on which the light source substrate is disposed, and the light source substrate is opposite to the side on which the light source is disposed. The side surface is used as a mounting surface, and the light source substrate is fixedly mounted on the base substantially in close contact with the mounting surface and a predetermined region of the mounting surface, and the substantially outer shape of the base is substantially the outer shape in a side view. The substantially outer shape of the base body is formed with a golden ratio as a basic tone.
With the above structure, the heat generated in the light source substrate can be conducted by heat conduction to the base to radiate the heat, thereby exhibiting a high heat dissipation function, and the base or the lighting fixture is formed to have a substantially outer shape with a golden ratio as a basic tone. Thus, the lighting device can provide a stable aesthetic appearance.

In the present invention, the number of light sources may be one or a plurality of light sources, and the light sources may be arranged in any suitable form, and the installation surface or the mounting surface may have a flat shape. The predetermined area of the installation surface and the mounting surface, which is appropriate such as a curved surface, and is in close contact, may be a part or the whole area of the installation surface, a part or the entire area of the mounting surface, or the installation surface and the mounting surface. Substantially close contact of the surfaces includes cases in which they are completely in close contact or can be regarded as close contact, and the light source board is fixed to the base body by, for example, fixing screws such as bolts and screws, and between the mounting surface and the installation surface. It is appropriate to interpose an adhesive between the two. Further, the present invention also includes a lighting device in which the substantially outer shape of the base body is substantially the outer shape, and the substantially outer shape of the base body in a side view is formed with a golden ratio as a basic tone.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION A lighting fixture having a heat dissipation structure according to the present invention will be described below with reference to specific embodiments shown in the drawings. FIG. 1 is a partially longitudinal side view showing a first embodiment of a lighting fixture having a heat dissipation structure of the present invention.

The luminaire 1 according to the first embodiment can be used as various illuminating lights such as a ceiling light and an underground light.
As shown in FIG. 1, a main body 2 which is mainly made of aluminum and has a substantially H-shaped column shape in a side view is provided. Inside the base body 2, a plurality of LED lamps 3 are arranged in a plurality of rows. The LED board 4 made of aluminum is internally mounted and fixed, and each LED lamp 3 is connected to the lighting circuit section 5 by a wiring not shown in FIG. 1 to be turned on and off.

The base 2 has a columnar shape whose longitudinal direction is the direction perpendicular to the paper surface of FIG. 1, and a thick plate-shaped bridge plate 22 is provided between the thick plate-shaped side plates 21 located on both the left and right sides in FIG. It is built as one. A protrusion or a ridge 23 is formed so as to project inside the upper portion of the side plate 21, and recesses 24 and 25 are formed inside the upper and lower ends thereof, respectively, and a recess is provided between the recesses 24 and 24 at the upper end. The cover 6 is provided so as to be attachable and detachable by engaging with 24. The cover 6 is made of a resin such as acrylic and is formed by arranging a desired color, and the lighting fixture 1 can illuminate a desired color by the color arrangement.

A substantially T-shaped T-shaped projection 26 is integrally formed on the lower surface of the bridging plate 22, and the lighting circuit section 5 is fixedly mounted on the lower surface of the T-shaped projection 26. LE as described below
Since the D substrate 4 is disposed on the upper surface of the bridge plate 22,
Preferably, the distance between the lighting circuit unit 5 and the LED substrate 4 is increased by forming the downward protruding distance of the T-shaped protrusion 26 or forming the bridging plate 22 thick. It is possible to prevent the heat generated in the lighting circuit unit 5 from being conducted to the LED substrate 4, or to reduce the amount of heat conducted as much as possible. In addition, a plurality of screw holes 27 in which female screws are threaded are formed at predetermined intervals in the longitudinal direction at the central position of the bridge plate 22.

The LED board 4 has an L on the upper surface in FIG.
The ED lamps 3 are arranged upward, and in this embodiment, the ED lamps 3 are arranged side by side in two rows with respect to the central axis, and at the center position thereof, the positions corresponding to the screw holes 27 of the bridge plate 22 are provided. A plurality of through holes 41 are formed at predetermined intervals in the longitudinal direction. The mounting surface 42, which is the surface of the LED substrate 4 opposite to the side where the LED lamps 3 are arranged, is arranged in close contact with the installation surface 28, which is the upper surface of the bridge plate 22, and corresponds to each screw hole 27. The positions of the through holes 41 are aligned and the washer 7
Each screw 7 is inserted into each through hole 41 through 1 and is screwed into each screw hole 27.
The ED substrate 4 is pressed. In this embodiment, the screw 7
The length of the screw part is slightly shorter than the total thickness of the LED substrate 4, the bridge plate 22, and the T-shaped protrusion 26.
Further, in this embodiment, the engaging members 8 each having a substantially V-shaped rod shape in a side view and formed of an insulating material or the like are respectively engaged between the right and left corners of the LED substrate 4 and the ridges 23. Has been done.

In the luminaire 1 of the first embodiment, the LED board 4 is pressed toward the installation surface 28 by the head of the screw 7 and the LED
Since the substrate 4 is fixed and fixed to the base body 2,
The close contact between the mounting surface 42 of the substrate 4 and the mounting surface 28 of the base 2 is maintained. Furthermore, the corners of the LED substrate 4 and the protrusions 23
Since the engaging member 8 is narrowly inserted between them, the LED substrate 4 can be more securely fixed and fixed to the base body 2. Since the LED substrate 4 and the base 2 are made of aluminum having a high thermal conductivity, the LED lamp 3
The base 2 to which the heat generated by lighting the LED closely contacts with the LED substrate 4
Smoothly conducts, exhibits excellent heat dissipation function, and LE
The D lamp 3 can be kept in a low temperature state.

Next, another embodiment of the luminaire having the heat dissipation structure of the present invention will be described. FIG. 2 is a partially longitudinal side view showing a second embodiment of the lighting fixture having the heat dissipation structure of the present invention.

The luminaire 1 of the second embodiment can be used as various illuminating lights such as ceiling lights and wall lights.
As shown in FIG. 3, the base 2 is mainly an ankle-shaped outer shape in a side view and is formed of columnar aluminum whose longitudinal direction is the direction perpendicular to the paper surface of FIG. 2, and the base 2 is similar to the first embodiment. LE made of aluminum inside
The D board 4 is built in, the LED lamps 3 are arranged on the LED board 4 in two rows, and each LED lamp 3 is turned on and off.

The outer shape of the base 2 is mainly the upper surface 201,
A curved side surface 202 that bends downward from the right end of the upper surface 201 of FIG. 2, a first inclined surface 203 that extends obliquely upward and leftward from a substantially lower end of the side curved surface 202 at a predetermined angle, and a first inclined surface 203. Second inclined surface 20 extending obliquely upward and leftward from the upper end of the first inclined surface 203 at a predetermined angle that is gentler than the inclination of the first inclined surface 203.
4 and. In a side view, the ratio of the horizontal length A of the upper surface 201 to the vertical length B of the side curved surface 202 of this embodiment, the length B and the length C of the first inclined surface 203 in the inclination direction. And the ratio of the length D of the second inclined surface 204 in the inclination direction to the length C, and the ratio of the length A to the length D are about golden ratio (about 1.618: 1), respectively. The outer shape of the base body 2 in a side view is formed to have a golden tone as a basic tone, and an excellent aesthetic appearance can be obtained.

The base 2 is formed with a first storage portion 205 that opens to the first inclined surface 203 in a predetermined space and a second storage portion 206 that opens to the second inclined surface 204 in a predetermined space. The head of the mounting screw 9 is housed in the second storage portion 206, and the male screw portion of the mounting screw 9 is inserted into the through hole of the upper surface 201 and protrudes upward, so that the mounting screw 9 is attached to the ceiling surface, the wall surface, or the like. The base 2 is attached by screwing. In addition, the base 2 includes the first storage portion 205, the first inclined surface 203.
An installation surface 207 formed at the same inclination angle as the above, a plurality of screw holes 208 formed inward of the base 2 from the installation surface 207 and formed at predetermined intervals in the longitudinal direction, and an opening of the first inclined surface 203. A recess 209 formed in the vicinity is provided, and the cover 6 is detachably provided by engaging with the recess 209.

The structure of the LED board 4 is the same as that of the first embodiment. The LED lamp 3 is arranged in a direction substantially perpendicular to the LED board 4, and the through hole 4 is provided at a position corresponding to the screw hole 208.
1 is formed. The mounting surface 42, which is the surface of the LED substrate 4 opposite to the side where the LED lamps 3 are arranged, is arranged in close contact with the installation surface 207 of the base 2, and the positions of the through holes 41 corresponding to the screw holes 208 are aligned. The screw 7 is inserted into the through hole 41 via the washer 71 and the screw hole 2
08, and the LED board 4 is pressed by the head of the screw 7 toward the installation surface 207. The first storage unit 205
With the LED board 4 and the LED lamp 3 installed in the
Illumination light is emitted in a direction substantially perpendicular to the inclination direction of the first inclined surface 203.

In the luminaire 1 of the second embodiment, the LED board 4 is pressed toward the installation surface 207 by the head of the screw 7 and LE is installed.
Since the D substrate 4 is fixed and fixed to the base body 2,
The close contact between the mounting surface 42 of the D substrate 4 and the mounting surface 207 of the base 2 is maintained. Since the LED substrate 4 and the base 2 are made of aluminum having a high thermal conductivity, L
The heat generated by the lighting of the ED lamp 3 is smoothly conducted from the LED substrate 4 to the intimate base 2 and exhibits an excellent heat dissipation function, so that the LED lamp 3 can be kept in a low temperature state. Further, by forming the base body 2 in an outer shape based on a substantially golden ratio, a stable aesthetic appearance can be obtained.

[0023]

EFFECTS OF THE INVENTION By using the heat dissipation structure of the luminaire or the luminaire of the present invention, it is possible to exhibit a high degree of heat dissipation function, extend the life of the light source of the luminaire, and provide good lighting for a long time. The effect that can be obtained is obtained. Therefore, even if it is difficult to embed the LED lamp, which is the light source, in the radiator from the viewpoint of the shape, size, structure, cost, etc. of the lighting equipment, the LED can exhibit a high heat dissipation function and can be used as an LED. The lamp can be kept in a low temperature state, the life of the LED lamp can be extended, and good illumination can be obtained for a long time.

[Brief description of drawings]

FIG. 1 is a partially longitudinal side view showing a first embodiment of a lighting fixture having a heat dissipation structure of the present invention.

FIG. 2 is a partially longitudinal side view showing a second embodiment of a lighting fixture having a heat dissipation structure of the present invention.

[Explanation of symbols]

1 lighting equipment 2 base 22 Bridge plate 23 ridges 26 T-shaped ridges 28,207 Installation surface 201 upper surface 202 side curved surface 203 First inclined surface 204 Second inclined surface 3 LED lamp 4 LED board 42 Mounting surface 5 Lighting circuit section 6 cover 7 screws 8 Engagement member

Claims (4)

[Claims] 1. A light source substrate on which a light source is disposed, and a base body on which the light source substrate is disposed, and a surface of the light source substrate opposite to the side on which the light source is disposed is a mounting surface. A heat dissipating structure for a lighting fixture, wherein the light source substrate is fixed to the base body so that a predetermined region of the installation surface and the attachment surface are substantially in close contact with each other. 2. The heat dissipation structure for a lighting fixture according to claim 1, wherein the light source is an LED lamp, and the light source substrate is an LED substrate. 3. The heat dissipation structure for a lighting fixture according to claim 1, wherein the base and the light source substrate are made of aluminum or an aluminum alloy. 4. A light source substrate on which a light source is disposed, and a base body on which the light source substrate is disposed, and a surface of the light source substrate opposite to the side on which the light source is disposed is a mounting surface. , The installation surface and a predetermined region of the mounting surface are in close contact with each other, and the light source substrate is fixed to the base, and the outer shape of the base is substantially the same as the outer shape of the base in a side view. A luminaire characterized by being formed with a golden ratio as a basic tone.