JPS5949103A - fluorescent light fixtures - 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 THE INVENTION This invention relates to fluorescent lamp apparatus.

A cover that blocks the view and prevents glare is used, but since the cover (B) protrudes downward, the end face of the cover becomes a bright part (0) and is dazzling.

In particular, when a large number of fluorescent light fixtures (3) are arranged in a straight line on the ceiling, the brightness area (
0) overlap and are extremely dazzling. In addition, in Figure 3, the light distribution characteristics in the longitudinal direction of the fluorescent lamp (A) are shown by dotted lines, and the light distribution characteristics in the width direction are shown by straight lines, but as shown by the arrows, upward light is generated and the illuminance downwards. becomes lower. This upward light is generated because the cover (Bl) is exposed in one direction.Furthermore, the cover (Bl) has drawbacks such as a large area and high cost.

This invention was made in view of these drawbacks, and is a fluorescent lamp that prevents glare, increases lighting efficiency, and actively reflects some light onto walls to provide soft lighting similar to indirect lighting. The purpose is to provide equipment.

This invention arranges a lamp and a narrow diffused shade that covers the lamp on one side of the main body, and positions the diffused shade within the lower edge of the light projection opening, thereby preventing glare and directing the upward direction. Improve lighting efficiency by eliminating the light of
The light from the lamp is diffused and radiated downward by the diffuser type shade, and the light from the lamp is reflected downward by the reflective shade.
Placing the lamp on one side of the main body allows some of the light to be reflected off the wall to the opposite side of the lamp, thus providing soft illumination similar to indirect lighting, and also allows for a diffused shade. It is designed to reduce the width and reduce costs.

An embodiment of the present invention will be explained based on FIGS. 4 to 8. (1) is a main body which is cased so that a light projection opening (2) is formed on the lower surface. This main body (1) is buried in the ceiling leaving a bent flange (3) at the lower edge. On the negative side of the main body (1), a straight tube type lamp (4) is provided while being held in a socket (5), and a diffused type shade (6) is attached to the mounting bracket (8) by means of a decorative screw (7). ) is installed. Mounting bracket (8)
are metal plates, but since they are located at both ends of the main body (1) in the longitudinal direction, they do not interfere with the light irradiation action of the lamp (4). The width of the diffused shade (6) is extremely narrow;
It is formed in the shape of a "<" having a horizontal surface (9) and an inclined surface 00. The horizontal plane (9) coincides with the lower edge of the light projection aperture (2), and the upper part of the inclined surface 00 is at least the lower edge of the light projection aperture (2).
The straight line connecting the - side edge of the lamp (4) and the outer periphery of the lamp (4) has reached zero force. Therefore, the diffused shade (6) is shaped to block the lamp (4) from the entire field of view.

Furthermore, one side of the parabolic reflective shade 0 → is the main body (1)
The - side is fixed by screw α3, and the other side is fixed (1
) is locked to the lower edge of the other side.

In such a configuration 1, the main body (1) is the flange (3)
It is buried in the ceiling 04i as shown in FIG.

When you walk forward in a long hallway, you will see several fluorescent illusion devices, but there is a diffused shade (6).
does not protrude from the lower edge of the main body (1), and the bright end surface is hidden. It's sturdy and doesn't cause any glare,
Further, since the diffused type shade (6) is located within the lower edge of the shade (1), no upward light is generated as shown in the light distribution characteristics of FIG. The solid line J shown in FIG. 8 is the light distribution characteristic in the direction orthogonal to the main body (1), and the dotted line is the light distribution characteristic along the longitudinal direction of the main body (1).

In this way, the lighting efficiency is high because the light is directed upward.

The shattered light from the lamp (4) is diffused through the diffuser type shade (6), reflected by the nine reflecting shades α that are irradiated downward, and is irradiated downward. Since the lamp (4) is located on the negative side of the main body (1), the light reflected by the reflective shade 0 is biased toward the wall α9 on the opposite side from the lamp (4). therefore,
The light distribution characteristic shown by the solid line perpendicular to the main body (1) is biased to one side from the center line. That is, the light from the lamp (4) is diffused and irradiated by the diffused shade (6), and a portion of the light is reflected by the reflective shade α and the wall α9, resulting in soft illumination similar to indirect illumination. can get.

Furthermore, since the diffused shade (6) is located on the - side of the main body (1) and has a small area, it is possible to reduce the cost of molding materials, and in order to diffuse the light, the diffused shade (6)
6) It is necessary to form a recess on at least one side of the
Since only a small area is required, surface processing costs for the molding die can also be reduced.

Since the present invention is configured as described above, by locating the diffused shade within the lower edge of the main body, it is possible to prevent glare, eliminate upward light, and increase illumination efficiency. A part of the light is reflected by the reflective shade toward the lamp and the wall on the reflecting side, and then reflected again by the wall, creating soft lighting similar to indirect lighting.
Further, by reducing the area of the diffusion type shade, it is possible to reduce costs including molding fees and mold processing costs.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a conventional example, Fig. 2 is an explanatory diagram showing its several states, Fig. 3 is a graph showing the light distribution layer properties, and Fig. 4 is a graph showing the light distribution layer properties.
The figure is a perspective view of one embodiment of the present invention, FIG. 5 is an enlarged sectional view thereof, and FIG. Figure 7 is a scaled-down perspective view showing the state of installation, and Figure 8 is a graph showing its light distribution characteristics. 1... Main body, 2... Light emitting aperture, 4... Lamp, 6
...Diffuse shade, 12...Reflective shade Applicant Tokyo'1b, Ki Co., Ltd. Town 2. , 7 ni hair,, 3 times-AH-Figure"

Claims (1)

[Claims] A main body is provided with a light projection opening formed on the lower surface, and a lamp on one side of the main body and a narrow diffused shade that blocks the lamp from the entire view from below are located within the lower edge of the light projection opening. 1. A fluorescent lamp apparatus, characterized in that the main body is equipped with a reflective shade that reflects the light from the lamp over the entire area of the light projection opening.