JPS5846801B2 - lighting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lighting device that uses light propagated within a light guide as a light source, and in particular, to a lighting device that uses light propagated within a light guide as a light source, and in particular, a method for effectively diffusing light propagating within a light guide for illumination. Regarding lighting equipment.

Recently, we have entered an era of energy conservation, and active research is being conducted in various fields on the effective use of solar energy.

When using solar energy, there is no need to convert solar energy into electrical energy, thermal energy, etc.
If you use it as industrial light energy for indoor lighting etc.
It is clear that there is no conversion loss and it is the most efficient.
Conventionally, solar energy collected outdoors is guided through a light guide to a location requiring illumination, such as indoors.

However, when light is emitted from the end face of the light guide, the spread angle of the light is approximately 45°, resulting in a spot light source, which is not necessarily satisfactory for softly illuminating a wide area.

The present invention was made in view of the above-mentioned circumstances, and
In a lighting device that uses light propagated through a light guide as a light source, the light emitted from the light guide is effectively diffused so that a relatively wide area can be illuminated with soft light.

FIG. 1 is a side sectional view for explaining one embodiment of the lighting device according to the present invention, and FIG. 2 is a sectional view taken along the line ■-n in FIG. 1, where 1 is a light guide. , 2 is an outer hollow body, 3 is an inner hollow body, and these outer hollow body 2 and inner hollow body 3 are 2
It constitutes a heavy hollow body.

4 is a first closing member for closing one end of the double hollow body, 5 is a second closing member for closing the other end of the double hollow body, and 6 is a first closing member. A guide body introduction hole 6 is provided approximately in the center of the member 4, and the guide body introduction hole 6 is hollow or closed with a transparent body 7 if necessary.

The other end of the light guide 1 is connected to a solar collector (not shown), by which the sunlight collected is emitted through the light guide 1 into the double hollow body.

As mentioned above, the double hollow body has an outer hollow body 2 and an inner hollow body 3.
As shown in the figure, translucent bodies 8 and 9 are complementary to each other on the surfaces of the outer hollow body 2 and the inner hollow body 30, that is, when the double hollow body is viewed from the radial direction, the outer hollow body When there is a translucent body 8 in the body, there is no semitransparent body 9 in the inner hollow body (and when there is no semitransparent body in the outer hollow body, there is a semitransparent body 9 in the inner hollow body). The light emitted into the double hollow body is emitted to the outside through an optical path as shown in the double hollow body, for example, and illuminates the entire room with soft light.

In this case, the second closing member 5 may be made of a transparent body as shown in the figure, or may be made of a semi-transparent body.
When the second closing member 5 is made of a transparent material, the optical path 11
The light emitted to the outside through the light path 12°'st 14 is the faintest, and becomes darker as more light passes through the translucent body or is reflected by the translucent body.

Alternatively, the portion A of the second closing member 5 that closes the inner hollow body 3 is made transparent or semitransparent, and the portion B that closes the space between the inner hollow body 3 and the outer hollow body 2 is made a semitransparent body or a reflective surface. Moreover, it is also possible to make the entire surface of the second closing member 5 a reflective surface.
In this case, if the first closing member 4 is made of a reflective surface, the effect can be further enhanced.

3 is a side sectional view for explaining another embodiment of the present invention, and FIG. 4 is a sectional view taken along line VI-VI in FIG. 3, showing one of the inner hollow body or the outer hollow body. In this case, the brightness in a specific direction can be made brighter or darker, but this will be explained above with reference to FIGS. 1 and 2. It is easy to understand that it can be applied to the highest quality lighting equipment.

It will also be readily understood that the inner and outer surfaces of the first closure member 4 or the inner and outer surfaces of the second closure member 5 may be complementary transparent and translucent.

As is clear from the above description, according to the present invention, for example, sunlight transmitted through a light guide can be effectively diffused to illuminate a relatively wide area with soft light, and moreover, it is possible to illuminate a relatively wide area with soft light. It is rare for light to enter the mortar directly, and the intensity of the light emitted from the double hollow body, including the light directly entering the mortar, varies depending on the viewing location, so it has the advantage that it can also be used for decorative lighting. There is.

Further, according to the present invention, since the light from the light guide is diffused within the sealed container, it is possible to prevent performance deterioration due to the intrusion of dust and the like, and to prevent the danger of heat generation in the dust part. By filling the airtight container with nitrogen gas or the like, oxidation of the reflective surface can be prevented.

[Brief explanation of drawings]

FIG. 1 is a side sectional view for explaining one embodiment of the lighting device according to the present invention, FIG. 2 is a sectional view taken from the line ■-■ in FIG. 1, and FIG. FIG. 4 is a side sectional view for explaining another embodiment of the present invention, and FIG. 4 is a sectional view taken along the line VI-VI in FIG. 1... Light guide, 2... Outer hollow body, 3
...Inner hollow body, 4...First closing member, 5...Second closing member, 6...
Guide body introduction hole, 7...Transparent body, 8゜9...
...Semi-transparent body, 10... Reflective surface.

Claims (1)

[Claims] 1. A double hollow body consisting of an inner hollow body and an outer hollow body,
A first closing member closing one end of the double hollow body, a second closing member closing the other end of the double hollow body, and a second closing member provided on the first closing member. 1. A lighting device having a guide introduction hole, and wherein the inner hollow body and the outer hollow body are complementary transparent and translucent. 2. The lighting device according to claim 1, wherein the second closing member is made of a transparent body. 3. The lighting device according to claim 1, wherein the second closing member is made of a semi-transparent body. 4. Claim 1, characterized in that the closing part of the inner hollow body of the second closing member is transparent, and the closing part between the inner hollow body and the outer hollow body is semitransparent. Lighting equipment as described. 5. Claim 1, characterized in that the closing part of the inner hollow body of the second closing member is made translucent, and the closing part between the inner hollow body and the outer hollow body is a reflective surface. Lighting equipment described in. 6. The lighting device according to claim 1, wherein the second closing member is a reflective surface. 1. The lighting fixture according to any one of claims 1 to 6, wherein the first closing member is a reflective surface. 8. The lighting device according to claim 6, wherein the second closing member is provided with a guide introduction hole. 9. The lighting fixture according to claim 1, wherein a part of the inner hollow body or the outer hollow body is a reflective surface. 10. The lighting device according to claim 1, wherein the inner and outer surfaces of the first closing member or the second closing member are complementary transparent and translucent.