JPS593445Y2 - Recessed lighting fixtures for straight tube fluorescent lamps - Google Patents

Description

[Detailed description of the invention] This invention relates to a recessed lighting fixture for a straight tube fluorescent lamp, and by brightly shining the defining surface of the louver, the brightness and darkness of the lamp light on the defining surface of the louver can be changed. To provide a recessed lighting fixture for a straight tube fluorescent lamp which eliminates the contrast and erases the lamp image, improves the brightness contrast with the ceiling surface, and further reduces glare.

The first embodiment of this invention is a built-in lighting fixture for two straight pipes.
This will be explained based on FIGS. 9 to 9.

In other words, this Q straight tube two-light recessed lighting fixture has a fixture body 3 with a built-in discharge lamp ballast 2 embedded in the ceiling 1, as shown in Figures 1 to 3. A concave reflector 4 with a two-row configuration is installed, and two
Attach the straight tube fluorescent lamps 5 and 6, and
, 6, a large number of louvers 7 are arranged below them.

In this case, the louvers 7 are fitted into and fixed in slits (not shown) of the concave reflector 4, and are arranged in large numbers in the axial direction at angles perpendicular to the axes of the straight tube fluorescent lamps 5 and 6. , the lower end protrudes slightly from the lower surface A of the instrument.

Next, the configuration of this louver 7 will be explained in detail.

As shown in FIGS. 4 to 6, this louver 7 has a square opening with one of its two opposing sides horizontal and the other two opposing sides perpendicular to the horizontal plane, with the apex displaced downward. A large number of quadrangular pyramid-shaped minute unit concave surfaces B are arranged and formed over the entire definition plane.

In this case, it is desirable that the length of one side of the square opening is 5 mm or less.

In this way, this recessed lighting fixture for two straight tubes has a large number of minute unit concave surfaces B of 5 mm square or less formed on the defining radiation surface of the louver 7, so as shown in FIG. The upper surface B1 facing downward reflects the light from the straight tube fluorescent lamps 5 and 6 to emit effective light outside the Daleer zone outside the instrument as shown by arrow C1, and both sides of the minute unit concave surface B B2 reflects the light from the straight tube fluorescent lamp 5.6 and emits light outward and downward from the instrument as shown by arrow C2, as well as scattering the light to the left and right. When looking at the top surface B1, the top surface B1 is dark (because the light reflected from the top surface B1 does not reach the eyes), and both sides B2 appear bright and shining, but in reality, the light reflected from both sides B2 is reflected from the top surface B1. The light is reflected slightly on B1, making the upper surface B1 shine, and the darkness of the upper surface B1 can be blurred by the brightness of both side surfaces B2. You can erase the lamp image by removing the contrast.

Further, the upwardly facing lower surface B3 of the minute unit concave surface B reflects the direct light from the straight tube fluorescent lamps 5 and 6 upward, and also reflects the reflected light from the upper surface B1 and both side surfaces B2 upward. The reflected light from the lower surface B3 of the minute unit concave surface B located in the part of the definition projection surface that protrudes from the lower surface A of the fixture exits the fixture and illuminates the ceiling 1, and the luminance contrast between the ceiling surface and the fixture surface is In addition, the number of louvers 7 can be set appropriately (dimension E and angle F determine the positions of the straight tube fluorescent lamps 5 and 6, and if the lower end of the louver 7 is in the retracted position from the lower surface A of the device, the louver 7 pieces are limited).

In addition, 1. Since the minute unit concave surfaces B are formed on the reflective surface of the louver 7, it is easy to process the mold 8 therefor.

That is, as shown in FIG. 9A, a large number of linear grooves 8A are cut in the mold 8 in the horizontal direction with a cutting tool 9, and a large number of linear grooves 8A are cut in the vertical direction with a cutting tool 9, as shown in FIG. 9B. Groove 8
Just tick B.

As described above, the recessed lighting fixture for two straight tubes of this invention consists of a recessed fixture body with an open bottom surface, a straight tube fluorescent lamp installed in the recessed fixture body, and a straight tube a louver disposed below the fluorescent lamp so as to be orthogonal to the tube axis, the lower end of which protrudes below the lower surface of the implantable device main body;
On the defining projection surface of the louver, there are a large number of minute unit concave surfaces in the shape of a quadrangular pyramid, with one of the two opposing sides of the rectangular opening being horizontal, the other two opposing sides being perpendicular to the horizontal plane, and the apex of which is displaced downward. As a result, the contrast between light and dark on the surface of the louver can be erased by both sides of the micro unit concave surface, making the surface shine brightly. Glare can be reduced by having the upper surface of the unit concave surface facing downward, and furthermore, by having the lower surface of the minute unit concave surface facing upward, the light from the straight fluorescent lamp is directed upward. Therefore, the ceiling surface can be illuminated by the minute unit concave surface of the part that protrudes from the bottom surface of the recessed fixture body, and the brightness contrast between the ceiling surface and the fixture surface can be improved. .

[Brief explanation of drawings]

Fig. 1 is a perspective view of an embedded lighting fixture for two straight tube lights, which is an embodiment of this invention, Fig. 2 is a sectional view thereof, Fig. 3 is a plan view of the louver, and Fig. 4 is an enlarged view of its main parts. Figure 5 is the ■- of Figure 4.
6 is a sectional view taken along the line VI-VI in FIG. 4, FIGS.
Figures A and B are explanatory diagrams for manufacturing a mold for manufacturing a louver. 1...Ceiling, 3...Appliance body, 5, 6
...... Straight tube fluorescent lamp, 7... Louva,
B...Minute unit concave surface.

Claims (1)

[Scope of utility model registration request] An implantable device main body with an open bottom surface, a straight tube fluorescent lamp mounted in the implantable device main body, and a straight tube fluorescent lamp disposed below the straight tube fluorescent lamp so as to be perpendicular to the tube axis, with the lower end of the straight tube fluorescent lamp mounted in the implantable device main body. a louver protruding downward from the lower surface of the main body of the louver, one of the two opposing sides of the rectangular opening is horizontal and the other two opposing sides are perpendicular to the horizontal plane on the defining projection plane of the louver. A recessed lighting fixture for two straight tube lights, which has a large number of square pyramid-shaped minute unit concave surfaces whose apexes are displaced downward.