JPS61240506A - Lighting fixture - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a luminaire, in particular to a plate-shaped luminaire.

[Conventional technology]

All conventional flat lighting fixtures project light from a light source placed on the back side of the glass plate and irradiate the front of the glass plate, so it is necessary to secure space behind the glass plate to embed the light source. Therefore, the depth of the lighting fixture should be equal to the thickness of the glass plate plus at least the storage space for the light source. Therefore, it has not been possible to satisfactorily satisfy the requirements, for example, when it is installed in a narrow space, or when it is desired that the protrusion from the wall be as small as possible, such as in the case of a night light installed on the stairs of a home.

[Problem that the invention seeks to solve]

The problem to be solved by the present invention is how to realize a thin lighting fixture in view of the above-mentioned prior art. It is thus an object of the invention to provide a luminaire whose thickness is substantially equal to the thickness of the glass plate.

In order to achieve this objective, the applicant first focused on embedding a light source within the thickness of the glass plate and projecting light from the lateral direction into the thickness of the glass plate. The idea was to project light onto the outside from the front of the glass plate.

Means for Solving Problem C] In order to achieve the above-mentioned problems, the lighting equipment according to the present invention includes a light passage means in the shape of a plate 1 whose back surface is a reflective surface, and a light passage means on the surface of the plate. at least one light source projecting light into the passage means in parallel directions, and a plurality of recesses in the passage means from the back side to the front side for reflecting the light and emitting it from the front side of the passage means. recesses are provided, and these recesses are arranged in a predetermined pattern so that the light beams contained within each projected area do not overlap with each other.

〔Example〕

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The lighting device according to the present invention basically comprises a glass plate 11 constituting passage means and a light source 33. The plate glass 11 is preferably a flat plate, but may be a curved plate depending on the purpose of use. Further, the external contour can be made into a rectangular, circular, oval, polygonal, or other arbitrary shape depending on the use, purpose, etc. A reflective surface (
A mirror surface 13 is formed to reflect light passing through the inside of the plate glass 11. A large number of inward depressions 15 are also formed on the back surface of the temporary glass 11. The shape of the depression 15 can be any shape such as a pyramid, a hemisphere, or an irregularly uneven shape. Moreover, the shape, size, and depth of all the depressions may be the same or may be irregular. The depressions 15 can be manufactured in the same manner as in the case of concavo-convex glass such as ordinary window glass.

According to the present invention, a large number of depressions 15 are provided with light beams S1 and S2 contained within their projected area, as shown in FIG.

S3. S4... are arranged so as not to overlap each other. That is, there is one depression 15 in each light beam S,, S2...
Only exists. This is to ensure that each light beam reaches its respective depression. Preferably, the depressions are arranged so that the distances each light beam reaches are different from each other. By doing so, light will be illuminated from the entire glass plate. Alternatively, by intentionally arranging the recesses 15 locally, for example, only the center or only the four corners of the glass plate 11 can be illuminated. In this way, the arrangement pattern of the depressions 15 can be arbitrarily determined from the viewpoint of decorative consideration or illuminance.

As shown in FIGS. 2 and 3, the light beam a33 hits the depression 15, is reflected there, and is emitted from the front surface of the glass plate 13 to the outside. By appropriately changing the angle, height, shape, and size of the recess 15, the light emission position and direction can be changed. In general, for example, irregular lighting is considered to have a greater decorative effect than regular lighting. is preferable.

According to the invention, the light source 33 is installed in a recess 2I formed in one part of the glass plate 11. As a light source, for example, a halogen lamp, which is small but has a large amount of light, can be used. The lamp 33 is provided with a holder 35 in order to be replaceable.
It has a male screw shaft 34 that is screwed into a screw hole 37 of the holder 3.
5 , it is electrically connected to a power cord 41 connected to the holder 35 via a terminal 43 at the bottom of the screw hole 37 . The holder 35 itself is removably press-fitted into the recess 21 of the glass plate 11, for example. Separately, a NAND member (not shown) is installed at the entrance of the recess 21.
may be fixedly installed, and the holder 35 may be screwed into the nut member.

The reflective surface on the back side of the glass plate can be formed, for example, by coating the entire surface with aluminum foil. The aluminum foil 13 is also coated inside the depression 15, thereby making the slope of the depression 15 an effective reflective surface. Furthermore, the outermost layer on the back surface of the glass plate 11 can be covered with a reinforcing glass layer 22 from above the aluminum foil 13. The glass plate 11 is frosted glass,
It may be frosted glass or transparent glass, or the decorative effect can be further enhanced by applying appropriate coloring or drawing a pattern or picture on the front surface.

As the light source 33, an ordinary miniature light bulb or a fluorescent lamp can be used instead of a halogen lamp.

Further, the thickness of the glass plate 11 can be, for example, about 511 mm.

Furthermore, according to the present invention, it is also possible to have a symmetrical shape in which the light sources 33 are provided on both sides of the glass plate 11, as shown in FIG. In this case, the depressions do not necessarily have to be arranged symmetrically, but the condition that the light beams included in the projected area of the depressions with respect to the corresponding light source do not overlap with each other is satisfied.

As shown in FIG.
By arranging +Sl, s, . . . so that they border without gaps, the arrangement density of the recesses can be increased, and the luminous flux from the light source can be used effectively, and the overall illuminance of the lighting fixture can be increased.

FIG. 6 shows yet another embodiment of the present invention. In FIG. 6, the light passage means is constituted by a pair of thin glass plates 11A and IIB separated by a holder 35, and these glass plates 11A, The space 26 between IIB is filled with air or inert gas.

The thickness W of the boulder 35 approximately corresponds to the thickness of the glass plate 11 in the embodiment shown in FIG. 2.3. A recess 15 is formed on the inner surface of the back glass plate 1, LA. The depression 15 is the glass plate 11
It may be formed integrally with A, or it may be formed as a separate part using aluminum foil 13 and fixed to glass plate 11A. When forming the recesses 15 directly on the glass plate 11A, it is necessary to coat the back surface of the glass plate 11A with a suitable material to make it a reflective surface. Other configurations are first
This is similar to the embodiment shown in FIGS. It goes without saying that in the embodiment shown in FIG. 6, the light sources may be placed on both sides as shown in FIG.

Glass plate 11, ]1. A, IIB can also be made of heat-resistant plastic or ceramics instead of glass.

〔Effect of the invention〕

As described in Section 2 below, according to the present invention, the light source projects light into the optical path from the side of the plate in a direction substantially parallel to the surface of the plate, so unlike the conventional method, light is projected from the back of the glass plate. The dimension in the thickness direction of the glass plate can be made smaller than that of the glass plate. Furthermore, since the projected light is emitted to the outside from the front of the plate through the many depressions formed in the plate, for example, by making a hat equivalent to a conventional desk lamp using the glass plate of the present invention, it is possible to create a tube without a light bulb. You can get a desk lamp with only one part. Furthermore, the lighting fixture of the present invention can be used as an interior light attached to the ceiling of an automobile, a wall light for home use, or a night light, and is extremely useful as a small-sized lighting fixture with a large decorative effect.

[Brief explanation of the drawing]

FIG. 1 is a front view of a lighting fixture according to the present invention, FIGS. 2 and 3 are cross-sectional views taken along lines nn and nr-m in FIG. 1,
FIG. 4 is a diagram explaining the arrangement relationship between the light beam and the depression in the present invention, FIG. 5 is a diagram showing a modified embodiment of FIG. 1, and FIG. 6 is a diagram illustrating another embodiment of the present invention. A similar figure. 11... Glass plate, 13... Reflective surface, 15...
- Hollow, 33... light source.

Claims (1)

[Claims] a light passage means in the form of a plate whose back surface is a reflective surface; and at least one light source that projects light into the passage means in a direction substantially parallel to the surface of the plate; is provided with a number of depressions recessed from the back side to the front side that reflect the light and make it exit from the front surface of the passage means, and these depressions are predetermined so that the luminous flux contained within the projected area of each of the depressions does not overlap with each other. A lighting fixture characterized by being arranged in a pattern.