JPH0230005A - Luminaire and system luminaire - Google Patents

Abstract

PURPOSE:To enable a highly efficient and uniform illumination in each place of a room by disposing a slender mirror reflecting plate having a curved sectional form and a white reflecting plate nearly connected to the lower side of said mirror surface. CONSTITUTION:A fluorescent lamp 6 is disposed in a position getting out to the right of the center of a chassis 2. A slender mirror reflecting plate 14 having a mirror face 13 facing the fluorescent lamp 6 has an inclined parabolic sectional form in the position crossing at a right angle with the longitudinal direction of the florescent lamp 6. The mirror reflecting plate 14 is fixed to the inner upper surface 4 of the chassis 2 so that its deepest part 15 is situated nearly right above the fluorescent lamp 6. A white plate 16 facing the fluorescent lamp 6 has white surfaces 171, 172 with different inclinations such that the reflecting plate 14 is extended, and forms a trapezoidal frame form as the whole. The light emitted from the fluorescent light within a luminaire 12 and reflected by the reflecting plates 14, 16 includes a higher quantity of light directing to the reverse direction to the side on which the fluorescent lamp 6 is onesided, and thus each place within a room is uniformly illuminated by disposing four luminaires 12 as blocks.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a ceiling-embedded lighting fixture using a straight tube fluorescent lamp and its installation structure.

Conventional technology Currently, straight tube fluorescent lamps are mainly used for lighting relatively large rooms such as offices. There are also embedded types. Typically, such lighting equipment is
It uses multiple rows of lighting fixtures arranged in parallel in a straight line.

An example of a conventional lighting fixture will be described with reference to FIG. 7. In this lighting fixture 1, a reflecting plate 3 having a trapezoidal cross section and having a similar opening is attached to the inside of an elongated box-shaped chassis 2 having an opening on the lower surface. Also,
A straight tube type fluorescent lamp 6 is held between two opposing lamp sockets 5 which are vertically arranged downward from the inner upper surface 4 of the chassis 2 so as to be surrounded by the reflector plate 3.

On the other hand, a stabilizer 8 is arranged in a space 7 provided above the chassis 2.

In such a configuration, for example, when a plurality of lighting fixture rows (not shown) are installed in parallel on the ceiling, the light emitted from each fluorescent lamp 6 is reflected downward by the reflector plate 3, and the room is well illuminated. illuminate.

The lighting fixtures 1 as described above are extremely brightly illuminated directly below each row of lighting fixtures, and are effective.

However, for example, between rows of lighting fixtures, the distance from the light source is large, so the illuminance decreases, making it visually seem quite dark. Therefore, in order to improve work efficiency and protect vision, there has been a demand for a lighting system that illuminates the entire room evenly. Therefore, a system called a square line system was developed in which four of the above-mentioned lighting fixtures 1 are combined in a square shape to form one mouth-shaped block, and this block is arranged on the ceiling.

Therefore, a lighting device in which the lighting fixtures 1 are arranged in a square shape as described above will be explained based on FIG. 8. this is,
A block 9 in which four lighting fixtures 1 are arranged in a square shape,
It is embedded in the ceiling surface 10 as a square line system. Note that here, a plurality of blocks 9 are arranged in two parts so that the distance between them substantially matches one side of the blocks 9.

In such a configuration, a large number of lighting fixtures 1 are arranged approximately equally on the ceiling surface 1o as blocks 9, so that
When these are turned on, they act as pseudo surface light sources and illuminate the room almost evenly.

Problems to be Solved by the Invention The square line system using the block 9 as described above has relatively little variation in illuminance on the irradiated surface compared to the above-mentioned system in which the lighting fixture rows are arranged continuously. It is effective because it illuminates the room almost uniformly. Here, on the floor surface 11, areas with approximately three levels of brightness are created corresponding to the arrangement of these blocks 9. That is, an area S11 corresponding to the vertical projection plane of each block 9 and an area S sandwiched between two areas S0, respectively.
ztThese areas S1. For example, the region 83 exists so as to be surrounded by S. Here, when the illuminance in each area 81 to S was actually measured, it was as follows: S□: S2: S, Misaki 10 Near: 6. In other words, the disadvantages of arranging the above-mentioned rows of lighting fixtures in a row are:
It can be seen that although there is a considerable improvement, the illuminance in area S is only about half that of area S. In other words, it can be seen that the brightness inside the room varies by nearly twice as much depending on the location.

Means for Solving the Problem A long and narrow specular reflector is formed whose cross section perpendicular to the longitudinal direction is curved, and a white reflector is formed with a white surface that is substantially continuous with the mirror surface of this specular reflector. A straight tube fluorescent lamp is placed below the reflecting plates, and is placed at a position shifted from the center of the reflecting plates in a horizontal direction perpendicular to the longitudinal direction.

Further, a specular reflection plate is formed in which a cross section perpendicular to the longitudinal direction of the fluorescent lamp is curved in a parabolic shape.

Kai forms an elongated specular reflector whose cross section perpendicular to the longitudinal direction is curved, and a white reflector with a white surface that is substantially continuous with the mirror surface of this specular reflector is placed under this specular reflector. Four lighting fixtures each having a straight tube type fluorescent lamp arranged at a position horizontally perpendicular to the longitudinal direction from the center of the reflector plate are provided. Multiple blocks arranged in a square shape are placed on the ceiling as a square line system so that the fluorescent lights are located inside.

An elongated specular reflector whose cross section perpendicular to the longitudinal direction of action is curved is formed, and a white reflector having a white surface substantially continuous with the mirror surface of the specular reflector is placed below the specular reflector. As a result, highly efficient reflection by the mirror surface can be expected.However, this mirror surface is almost invisible from the outside, and since the white reflector has been moved outward, the reflected light from this white reflector is soft. It is warm, and furthermore, by placing a straight tube fluorescent lamp at a position horizontally shifted from the center of the reflector at right angles to its longitudinal direction, the light emitted from this fluorescent lamp is reflected by the reflector. Since most of the light directed toward the opposite side of the lighting fixture is from the side where the fluorescent lights are located, we combined four lighting fixtures into a square block with each fluorescent light on the inside. Many of these,
By installing it on the ceiling as a square line system, each block has a large amount of light illuminating the outside, so the area below between each block, which tends to be dark, can be illuminated with high efficiency.

Embodiment An embodiment of the invention set forth in claims 1 and 2 will be described based on FIGS. 1 to 4. In addition, the same parts as the lighting fixture 1 illustrated in FIG. 7 are designated by the same reference numerals 9,
Explanation will also be omitted. First, in the lighting fixture 12 of this embodiment,
Since the lamp socket 5 is erected at a position offset in the horizontal direction perpendicular to the longitudinal direction of the chassis 2, the fluorescent lamp 6 is arranged at a position offset to the right from the center of the chassis 2 in FIG. . Further, as illustrated in FIG. 1, the elongated specular reflection plate 14 provided with the mirror surface 13 facing the fluorescent lamp 6 by plating or the like has a cross-sectional shape perpendicular to the longitudinal direction of the fluorescent lamp 6 that is inclined. It has a parabolic shape. Further, this specular reflection plate 14 is fixed to the internal upper surface 4 of the chassis 2 with screws or the like so that the deepest part 15 corresponding to its apex is located almost directly above the fluorescent lamp 6. The entire structure exists above the center of the fluorescent lamp 6. On the other hand, the white reflector 16 facing the fluorescent lamp 6 is the first
As illustrated in the figure, the white surfaces 171° and 17□ are formed with mutually different slopes as if they were extensions of the specular reflection plate 14, and the whole is formed into a trapezoidal frame shape. Moreover, this white reflecting plate 16.

Four V-shaped springs 18 attached to its outer surface
and four spring catches 19 having C-shaped openings attached to the inner surface of the chassis 2, so that the upper openings 20 thereof are aligned with the openings 21 of the specular reflector 14, and the upper openings 20 are arranged inside the chassis 2. Here, the entirety exists below the center of the fluorescent lamp 6.

In such a configuration, the light distribution characteristics of this lighting fixture 12 will be explained with reference to FIGS. 3 and 4.

In addition, here, in order to clarify the explanation, the lighting equipment 12
In contrast, three types of directions as shown in FIG. 3 are assumed.

In other words, the horizontal direction A□- is perpendicular to the longitudinal direction of the fluorescent lamp 6.
A2. Direction B parallel to the longitudinal direction of the fluorescent lamp 6 perpendicular to this
-B, direction C□-C2 between these directions A and H
It is. Here, the numbers attached to the directions A and C mean the directions in which the fluorescent lamp 6 is deviated from the center of the lighting fixture 12.

Note that these directions A-C exist within one horizontal plane, for example.

Therefore, the light emitted from such lighting equipment 12,
The light distribution characteristics in each direction A-C will be explained with reference to FIG. 4. As described above, it can be seen that this lighting fixture 12 has asymmetrical light distribution characteristics in directions A and C, and approximately symmetrical light distribution characteristics in direction B. This is because the light emitted from the fluorescent lamp 6 is directed in the direction A1 due to the shape of the specular reflector and the white reflector 14, 16, and the position of the fluorescent lamp 6 facing them. This is due to a large amount of reflection from C1.

Next, an embodiment of the invention according to claim 3 will be described based on FIGS. 5 and 6. Note that the same parts as the lighting device illustrated in FIG. 8 are designated by the same reference numerals.

Use names and process descriptions as well. In this system lighting fixture, a square-shaped block 22 in which four lighting fixtures 12 are arranged in a square shape so that each fluorescent lamp 6 is placed inside is embedded in the ceiling surface 1o as a square line system. Here, these lighting fixtures 12 are attached to a mouth-shaped frame 23 to form an integrated block 22.

In such a configuration, the light distribution characteristics of this system lighting fixture will be explained. Here, the block 22 and the areas S1 to S are arranged in the same manner as in the conventional example illustrated in FIG. Therefore, when we actually measure the illuminance in each area S~S, we find that: S: S2: S3: 10:9:
It became 8.5. That is, even the darkest area S3 shows 85% of the illuminance of the brightest area S, indicating that the brightness of each part of the room is approximately average. this is.

As mentioned above, each lighting fixture 12 emits a large amount of light in the direction C□, so by continuously arranging them as square blocks 25 on the ceiling surface 10, the area S3, which tends to be particularly dark, can be illuminated with high efficiency. Due to the fact that it was illuminated. Similarly, since the amount of light irradiated in the direction A1 is large, the region S2, which tends to be dark, is also illuminated with high efficiency.

Effects of the Invention The present invention forms an elongated specular reflector whose cross section perpendicular to the longitudinal direction is curved as described above, and a white reflector in which a white surface substantially continuous with the mirror surface of this specular reflector is formed. ,
By placing this mirror reflector on the lower side, we can expect highly efficient reflection from the mirror surface.However, this mirror surface is almost invisible on the outside, and since the white reflector is moved outward, this white color The light reflected from the reflectors is soft and warm, so it is possible to illuminate the room with high efficiency without putting a strain on your vision. By arranging straight tube fluorescent lamps in shifted positions, the amount of light emitted from the fluorescent lamps and reflected by the first reflector is directed toward the opposite side of the lighting fixture from where the fluorescent lamps are offset. Therefore, by combining four lighting fixtures into a square block so that each fluorescent light is on the inside, and arranging a large number of these on the ceiling as a square line system, each block can be placed on the outside. Since the amount of light illuminated is large, the areas below between the blocks, which tend to be dark, are also illuminated with high efficiency, resulting in effects such as substantially uniform brightness throughout the room.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional side view showing an embodiment of the lighting device according to claims 1 and 2, and FIG. 2 is an exploded perspective view of the lighting device.
Figure 3 shows direction A- for explaining the light distribution characteristics of lighting equipment.
FIG. 4 is a light distribution characteristic diagram in the direction A-C added to FIG. 3, FIG. 5 is an explanatory diagram of the system lighting equipment, FIG. 6 is a front view of the block, and FIG. The figure is a vertical side view showing an example of a conventional lighting fixture, and FIG. 8 is an explanatory diagram of a room in which conventional lighting fixtures are arranged in a vertical pattern on the ceiling. 6...Fluorescent lamp, 10...Ceiling, 12...Lighting equipment, 13...Mirror surface, 14...Specular reflector, 16...
White reflector. 17. 17□...White surface, 22...Block, B
...Longitudinal direction 3.1 Figure

Claims (1)

[Claims] 1. An elongated specular reflector whose cross section perpendicular to the longitudinal direction is curved, a white surface substantially continuous with the mirror surface of the specular reflector, and a white surface disposed below the specular reflector. 1. A lighting device comprising: a white reflecting plate; and a straight tube fluorescent lamp disposed at a position offset from the center of the reflecting plate in a horizontal direction perpendicular to the longitudinal direction. 2. The lighting fixture according to claim 1, further comprising a specular reflection plate whose cross section perpendicular to the longitudinal direction of the fluorescent lamp is curved parabolically. 3. an elongated specular reflector whose cross section perpendicular to the longitudinal direction is curved; a white reflector having a white surface substantially continuous with the mirror surface of the specular reflector and disposed below the specular reflector; Four lighting fixtures each consisting of a straight tube type fluorescent lamp are arranged at positions shifted from the center of each of these reflectors in a horizontal direction perpendicular to the longitudinal direction, and these four lighting fixtures are connected to each of the fluorescent lamps. A system lighting fixture characterized by having a plurality of rectangular blocks arranged in a square shape on the ceiling so that the inside of the block is arranged in a square shape.