JPS5894701A - Fluorescent lamp apparatus - 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 The present invention relates to a fluorescent light fixture suitable for illuminating a room with a relatively low ceiling height and a large area, such as an office.

In general, lighting fixtures with wide illumination type light distribution characteristics are suitable for illuminating rooms with low ceilings and large areas, but in order to ensure sufficient vertical light distribution, as shown in Figure 4. It is preferable to have a light distribution characteristic called a Batwin L shape, which provides strong luminous intensity diagonally to the left and right from directly below the pottery. Although this type of idea has been advocated in the past, it has not been implemented in the form of specific lighting equipment other than for special purposes such as road lights, which mainly use point light sources. One of the reasons for this is that when trying to obtain a batwing-shaped light distribution with a fluorescent light fixture, it becomes necessary to tilt the reflective surface, making it difficult to pass the light through the fluorescent lamp in front of the eclipse, which tends to cause glare. There are drawbacks.

The present invention seeks to solve the glare problem and provide a fluorescent lamp fixture with nine batwing-shaped light distribution characteristics.

FIG. 1 is a book showing an embodiment of the present invention, and 1 is the instrument main body.
Reference numeral 2 denotes a reflector plate having a substantially parabolic cross section, and another reflector plate 2 is arranged in parallel in a pair at a position symmetrical to the center line of the instrument body. The pair of reflecting plates 2.2 are arranged with the center axes of their parabolas facing inward, and although these center axes are not shown, they intersect directly below the device 1.The reflected light is directed toward the center line of the device body 1. oriented in the opposite direction. As a result, the reflector plate 2 on the right side creates a light distribution with a strong luminous intensity on the left side, and the reflector plate 2 on the left side produces a light distribution with a strong luminous intensity on the right side of the fixture.1 Both obtain a batwing-shaped light distribution. In this embodiment, the opposing side edges 21, 21 of both reflectors 2.2 are bent vertically to form a vertical portion 3 in the center of the instrument body 1.
A small amount of air Pjt- is formed in this vertical portion 3, and this air *' is used as an air conditioning outlet. In consideration of the possibility that the fluorescent lamp 4 may be directly visible when viewed, it also serves as a light shielding plate to cut glare so that the fluorescent lamp 4 cannot be seen at an elevation angle of less than 50°, for example.

In addition, to reduce the height, width, and middle of the instrument body 1,
If the focus of the parabola formed by the reflector plate 21111 is brought as close to the reflector plate 2 as possible, the fluorescent lamp 4 and the reflector plate 2 will approach each other, making handling difficult.
A groove-shaped relief t is made in the rear part of the auxiliary reflector 2.
In the case of the O parabola defined as 2, the reflected light from the actual size portion of the fluorescent lamp 4 is originally in a shape that passes through the fluorescent lamp 4 itself, so it is not necessary to configure this portion as a parabola. There is practically no problem.

Ideally, the angle of attack of the central axis of the parabola constituting the reflector plate 2 should be set to 60° 1 degree, and the positional relationship between the fluorescent lamp 4 and the vertical section 3 should be set to 0 to satisfy the requirements for glare cutting. To be more precise, if the lamps are spaced apart by at least 215 mm of the width of the fixture body, the desired characteristics can be obtained with dimensions similar to those of conventional fluorescent lamp fixtures.

FIG. 2 shows another embodiment, in which a pair of reflectors 2.2
In this case, the opposing side edges 21, 21 of the reflecting plate 2.2 are arranged symmetrically with the central axes of the paraboloids facing outward. Form. At this time, the lead I1 portion 5 requires a certain size in order to ensure a batwing-shaped light distribution and to limit light directed directly below. If a wide illumination level is sufficient, for example, the reflector 2 located on the side edge of the instrument body 1
Although it is possible to hold down the vertical part 5 at the height of the 0 side edge 2S,
When trying to use a batwing-shaped light distribution t#4, it is necessary to limit the light directly below, so each reflector plate 2.2
Since the tubes are required to be y-symmetrical with respect to the central axis of the instrument body 1, the vertical portion 3 protrudes from the center of the instrument body 1, but this is unavoidable. In this case, the glare cut is
It is sufficient to block the light from the fluorescent lamp 4 in the front.0
In order to make the dimensions of the fluorescent lamp compact, K requires the same consideration as in the embodiment shown in Figure 1. In this case, the spacing between the lamps is one If the width is within 1/3 of the width of the different body, it should be noted that this embodiment also uses the vertical portion 5 as an air conditioning outlet and shows the overhang. In the fluorescent light fixture, the vertical section 3t can be used for mounting the lighting duct (5) and is used to mount the lighting duct. (In the case of a fluorescent light fixture that has a wing-shaped light distribution system, the light in the center is mainly from the left and right sides, and even if a spotlight 6 is attached directly below the center of the fixture body, the illuminance directly below it will cause dizziness.) It has the advantage of being unaffected.

According to the above-described construction, the present invention combines a pair of reflective sheet metals forming a substantially parabolic shape, and their opposing side edges form a vertical St* in the center of the instrument body, so this vertical part is used for glare cutting. (because it plays a role and also restricts the light directly below) (a wing-shaped light distribution system can be easily obtained).

[Brief explanation of the drawing]

@1 Figure is a partially cross-sectional view showing an example of heavy metal enclosure 1.
Fig. 2 is a partially sectional view showing the second embodiment, and Fig. 5 is a partially sectional side view showing the fifth embodiment. Fig. 4 is a Kutwing. This is a distribution diagram showing an example of shaped light distribution. In the diagram, 1 is the main body of the device, 2 is the reflector, 3 is the vertical part, and 4 is the fluorescent lamp.

Claims (1)

[Claims] 1. A pair of reflectors with a substantially parabolic cross section are arranged side by side in symmetrical positions with respect to the center line of the instrument body, and the opposing side edges of both reflectors are used to form a vertical St shadow in the center of the instrument. A fluorescent lamp device 2 characterized in that the vertical portion is an equipment space, and a fluorescent lamp device 3 according to claim 1, wherein the vertical portion is an equipment space. The fluorescent lamp device 4 according to claim 1 is characterized in that the pair of reflecting plates are arranged so that each of the pair of reflecting plates faces inward from its center IIt. In the fluorescent lamp unit 5 according to item 1, the pair of reflectors are arranged at a center me and an outer lI respectively.
Claim 1, which is arranged toward K and has a 1* symbol
Fluorescent lamp vision as described in section