JP2001155536A - Lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device having a high radiating function and capable of remarkably elongating the life of an LED lamp. SOLUTION: This lighting device has an LED lamp mounted in a case while ensuring the predetermined orientation, a radiator is packed in the case, and the LED lamp is embedded in the radiator in a state that a luminous part is projected. The radiator is made of, for example, silicon rubber or the like for a heat sink, having the insulating property or the water-proof property, or the radiator has preferably both of the insulating property and water-proof property.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting device using an LED lamp capable of exhibiting an excellent lighting function.

[0002]

2. Description of the Related Art Hitherto, an illumination device using an incandescent lamp or a fluorescent lamp has been used. Since the illumination light of an incandescent lamp or a fluorescent lamp has a characteristic that it has a high light amount and is omnidirectional at 360 degrees, by providing a reflector to control the directivity of the illumination light, it can be used indoors or outdoors. It is widely used as lighting and the like.

However, since the illumination light of an incandescent lamp or a fluorescent lamp has no directivity, it must be controlled by a reflector in order to be used as an illumination device, and the illumination light that cannot be controlled by the reflector is wasted. . Furthermore, incandescent lamps and fluorescent lamps may have a ratio of converting electric power into illumination light and heat, such as 5W: 95W. Therefore, it has disadvantages, such as inefficiency as a lighting device, a high voltage at the time of lighting and a large amount of generated heat, and a short life.

On the other hand, in recent years, there has been a demand for a lighting device which is easy on the eyes and can realize a sophisticated interior and the like. ing.

In order to overcome the above-mentioned drawbacks and satisfy social needs, Japanese Patent Application No. 11-050700 proposes a lighting device using an LED lamp. The illuminating device uses the directivity of an LED lamp, and is provided with an LED lamp via a heat sink to secure a directional direction so that a desired location can be illuminated.

[0006]

However, although the above-mentioned lighting device is provided with an LED lamp via a heat radiating plate to avoid a rise in temperature, the life of the LED lamp is drastically shortened in a high temperature state. LE just through the heat sink
It cannot be said that the structure in which the D lamp is provided still has sufficient heat radiation. The life of an LED lamp is doubled at a temperature difference of 10 ° C. For example, an LED lamp having a life of 1000 hours at a temperature of 120 ° C. has a life of 6 at a temperature of 60 ° C.
4000 hours.

Further, in order to stably exert the function of the LED lamp, the insulation at the required portion of the lighting device is made more complete, and furthermore, the versatility which can cope with various environments is improved. It is also required that the lighting device be excellent in water penetration.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide an illuminating device having an advanced heat radiation function and capable of dramatically extending the life of an LED lamp.

Furthermore, the insulation of the necessary parts can be made more complete and the function of the LED lamp can be exhibited stably, and it has a high degree of waterproofness, is excellent in versatility, and can cope with various environments. An object is to provide a lighting device.

[0010]

According to the lighting device of the present invention, an LED lamp is provided in a case while ensuring a predetermined directional direction, and a heat radiator is provided by being filled in the case. The LED lamp is embedded in the heat radiator with the light emitting portion protruding.

Further, in the above-mentioned lighting device, the radiator has an insulating property, or the radiator has a waterproof property, or the radiator has an insulating property and a waterproof property. It is preferable to have it. As the radiator, for example, silicon rubber for a heat sink is used.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A lighting device according to the present invention will be described below with reference to a specific embodiment shown in the drawings. FIG. 1 is a partially longitudinal side view showing an embodiment of a garden lamp using the lighting device of the present invention.

In FIG. 1, the garden light 10 is mainly LE
Case 1 in which the D lamp 11 is directed upward in a predetermined directivity direction
The LED lamp 11 is embedded in the heat radiator 13 so as to protrude from the light emitting portion 11a.

The LED lamp 11 is connected to a lamp substrate 14 by terminals and the like, and the lamp substrate 14 is connected to a power supply substrate 15 through lead wires or the like not shown in the drawing.
5 is a plug 16 at the tip via a lead wire or the like omitted in the figure.
a is connected to a power cord 16 having a. The power cord 16 is guided outward through a cord hole 12 a on the side of the case 12. The circuit of the LED lamp 11 including the lamp substrate 14, the power supply substrate 15, and the like has a sine current at 100 VAC.

In this embodiment, the case 12 has a substantially cylindrical shape and is made of a material having excellent heat dissipation. The lower end of the case 12 has a substantially conical spike portion 17 having a mountain shape formed on the surface thereof so as to be embedded in the ground. The plate 17a is screwed with a bolt 18.
The spike 17 is also made of a material having excellent heat dissipation. A concave portion 12b is formed at the upper end of the case 12, and a substantially transparent and substantially cylindrical acrylic cover 19 is fitted into the concave portion 12b,
It is fixed with an adhesive 20 or the like. An end cap 21 is placed on the upper end of the acrylic cover 19, and a concave concave reflecting plate 22 is provided inside the end cap 21,
The illumination light from the LED lamp 11 is reflected outside the acrylic cover 19.

It is also possible to adopt a configuration in which the fixing is not performed by the adhesive 20 or the like, and the fitting is simply performed. For example, the case 12 is made of aluminum die-cast with black paint, the spike portion 17 is made of aluminum cast with black paint, and the end cap 21 is made of stainless steel with black paint.

The radiator 13 is at least the LED lamp 11
Although a part of the light emitting portion 11a is filled and provided so as to protrude, the entire light emitting portion 11a may protrude. Heat radiator 1
The material of No. 3 is suitable as long as it has a high thermal conductivity and is excellent in heat dissipation, but it is more preferable if the material is excellent in insulation and water resistance. In this embodiment, white silicon for a heat sink is used. Filled with rubber. It is preferable that the silicone rubber for the heat sink is provided by being cured after being filled with a resin, since there is no gap and good heat dissipation, electrical insulation, and water resistance are obtained.

The garden light 10 is excellent in heat dissipation, has a double insulation structure composed of a heat radiator 13 having insulation and the insulation of the circuit itself, and is excellent in waterproofness. In addition, the light utilization efficiency is almost 100%, and in accordance with the demand for energy saving, it is small and excellent in portability, and maintenance is extremely easy or unnecessary. Also, the attachment and detachment thereof are extremely simple due to the spike portion 17 and the like.

Next, a case where the lighting device of the present invention is applied to a foot light will be described. FIG. 2 is a side view showing an embodiment of a step light according to the present invention.

In FIG. 1, the foot light 30 is mainly LE
A plurality of D lamps 31 are disposed in the case 32 in a diagonally downward direction that is a predetermined directional direction.
Is filled, and the LED lamp 31 is embedded in the radiator 33 so as to protrude from the light emitting portion 31a. It should be noted that a daylight sensor not shown is attached to the step light 30.

The LED lamp 31 is connected to a lamp board 34 by terminals and the like, and the lamp board 34 is connected to a power board 35 via lead wires and the like (not shown).
Reference numeral 5 is connected to a built-in solar cell 36 via a lead wire or the like not shown in the drawing. The current of the circuit including the lamp substrate 34, the power supply substrate 35, the solar cell 36, and the like has a sine wave.

The case 32 has a substantially trapezoidal cross section and is made of a material having excellent heat dissipation. The case 32 is embedded in the wall surface 40 or disposed in the opening of the wall surface 40. The case 32 is attached diagonally downward to a square support plate 38 on which a substantially mountain-shaped guard 37 is formed. A solar cell 36 is provided diagonally above the case 32 and diagonally below the direction in which the LED lamp 31 is directed. Diffusion acrylic covers 39 are provided in the guards 37 respectively. The support plate 38 is a wall surface 4
0 is screwed with a bolt 41 at a predetermined position. For example, the case 32, the guard 37 and the like are made of aluminum die-cast.

The radiator 33 is at least the LED lamp 31
The light emitting portion 31a is filled and provided so as to protrude, but the entire light emitting portion 31a may protrude. Also in this embodiment, the radiator 33 is filled with white silicon rubber for a heat sink, but the material of the radiator 33 is appropriate as long as it has high thermal conductivity and excellent heat dissipation. It is even better if it has excellent insulating properties and water proofness. It is preferable that the silicone rubber for the heat sink is provided by being cured after being filled with a resin, since there is no gap and good heat dissipation, electrical insulation, and water resistance are obtained.

The step light 30 has excellent heat radiation, has a double insulation structure composed of an insulating radiator 33 and the insulation of the circuit itself, and also has excellent water proofness. It is also used indoors and outdoors,
By using various embedding devices, wall embedding, direct mounting, underground embedding, and the like are possible, and attachment and detachment thereof are extremely simple.

The garden light 10 and the foot light 30 are provided by the LE 12 provided in the case 12 filled with the radiator 13.
The D lamp 11 is unitized with the spike portion 17 and the acrylic cover 19 or the like, or the LED lamp 31 provided in the case 32 filled with the radiator 33 is provided with a guard 37, a support plate 38, and a diffusion acrylic cover 39. By unitizing with, etc., handling such as attachment, detachment, and movement is extremely easy.

[0026]

Since the lighting device of the present invention has the above-described structure, it has an advanced heat radiation function and has an effect of greatly extending the life of the LED lamp.

Further, the lighting device of the present invention is capable of stably exhibiting the function of an LED lamp by more completely insulating the necessary parts, and has a high degree of waterproofness and excellent versatility. Can cope with various environments.

[Brief description of the drawings]

FIG. 1 is a partially longitudinal side view showing an embodiment of a garden light using a lighting device of the present invention.

FIG. 2 is a side view showing an embodiment example of a foot light using the lighting device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Garden light 30 Foot light 11, 31 LED lamp 11a, 31a Light emitting part 12, 32 Case 13, 33 Heat radiator

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) F21S 1/10 R (72) Inventor Akihito Yasuhara 1-18-307 Fuji term, Kudera, Abiko-shi, Chiba Reference) 3K014 AA01 LA01 LB04

Claims (3)

[Claims] 1. An LED lamp is provided in a case with a predetermined directional direction secured, and a radiator is provided in the case so as to be filled therein. A lighting device, wherein an LED lamp is embedded in the heat radiator. 2. The lighting device according to claim 1, wherein the heat radiator has an insulating property. 3. The lighting device according to claim 1, wherein the heat radiator is waterproof.