JPH04206105A - Ceiling embedded type display lighting fixture - Google Patents

Abstract

PURPOSE:To exhaust the fumes generated on a ceiling surface to the back of the ceiling, so as to prevent a display surface from being covered with the fumes by providing an opening part and a gap part communicated therewith in the box body on the point opposed to the opening part provided on a face panel. CONSTITUTION:The light emitted from a lamp 3 is reflected directly or reflected on reflection plates 9, 10, and enters from an upper end surface 2 of a conductive plate 1 into the conductive plate 1, and a display plate 6 is irradiated thereby. The picture and letter printed on the display surface of the display plate 6 can thus be recognized. When the fumes caused by fire and so on are generated, the fumes are exhausted to the back of a ceiling through an opening part 13, a gap 15, and a notch window 17. It is prevented thereby that the display plate 6 of a display panel 7 for indicating the escape port and the like on the lower side of a face panel 8 is covered with the fumes generated in the room, and is thereby not seen.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention is applicable to ceiling-embedded display lights, guide lights, etc. that illuminate a display surface in front of a flat light guide plate by allowing light from a light source to enter the plate. This invention relates to shape display lighting equipment.

[Prior art 1] Conventionally, in order to make display lighting equipment such as indicator lights and guide lights thinner, there have been many edge light methods in which light enters from the end face of a light guide plate. Fig. 4 is a cross-sectional view showing a conventional ceiling-embedded display lighting fixture, and Fig. 4 is a perspective view showing its appearance. It has a display surface that is directly printed or engraved.A linear lamp 3 is arranged as a light source on the upper end surface side of the light guide plate 1, and a reflecting plate 9 is further provided above it.And, This lamp 3
The reflector plate 9 is disposed inside a casing 11 that is fixed and buried in the ceiling with bolts 18, and lighting components such as a ballast 12 are also housed within the casing 11. Also,
The lower opening of the casing 11 is covered by a decorative panel 8 exposed on the ceiling surface, and a hollow hole is provided in the center of the decorative panel 8 directly below the lamp 3 in the longitudinal direction. A light guide plate l is fixed therethrough.

In the display lighting device configured as described above, the light from the lamp 3 enters the light guide plate 1 in a concentrated manner, and the display surface in front of the light guide plate 1 is brightly illuminated. As a result, the contents displayed on the display screen are clearly displayed, and it is possible to know the evacuation direction, etc.

[Problems to be Solved by the Invention] Conventional ceiling-embedded display lighting fixtures are configured as described above, so that when smoke occurs, for example, during a fire, the smoke first reaches the ceiling surface. However, if there is no place for the smoke to escape on the ceiling surface, there is a problem that the display surface will be obscured by smoke and the original function of the device will be lost, which is especially dangerous if the display indicates evacuation direction etc. There was a problem that.

This invention was made to solve the above-mentioned problems, and allows indoor smoke to be discharged into the attic.
The purpose of the present invention is to provide a highly stable ceiling-embedded display lighting fixture without losing the original function of the fixture.

[Means for Solving the Problems] A ceiling-embedded display lighting device according to the present invention includes a flat display panel comprising a light guide plate placed on the back side of a display surface and a reflector plate placed on the back side of the light guide plate. is fixed to the central part of the decorative panel attached to the ceiling surface, and a linear light source is arranged on the upper end surface of the light guide plate, and the lighting components of this light source are placed in a housing embedded in the ceiling. In a display lighting device that illuminates a display surface of a display panel by inputting light from the light source into a light guide plate, an opening is provided on the peripheral side of the decorative panel, and the casing faces the opening. A partition is provided inside to create a gap between the side wall of the casing and an opening communicating with the gap in the side wall of the casing.

[Function] In the ceiling-embedded display lighting device of the present invention, an opening provided in the decorative panel on the ceiling surface, a gap in the casing facing this opening, and a side wall of the casing communicating with this gap are provided. Through the opening, smoke generated on the ceiling surface is discharged to the attic space,
This prevents the display surface from being covered with smoke.

[Example] Fig. 1 is a cross-sectional view showing one embodiment of the present invention.
The same reference numerals as in the figure indicate the same constituent parts. 1, a flat light guide plate is placed on the back side of the display surface, and a lamp 3, which is a linear light source, is placed on the upper end surface 2 of the light guide plate. 4
6 is a reflecting plate placed on the back side of the light guide plate 1, which efficiently reflects the refracted light that passes through the back side of the light guide plate 1. 6 is a display plate with pictographs etc. printed on the display surface; It is integrally formed with the reflecting plate 4 by adhesion to form the display panel 7. 8 is a decorative panel mounted exposed on the ceiling surface, with the display panel 7 penetrated through the center part and fixed with screws. 9 and 10 are reflector plates arranged to surround the lamp 3, 11 is a housing in which lighting parts such as the ballast 12 of the lamp 3 are buried in the ceiling, and the lower opening is a decorative panel. 8. 13 is an opening provided on the peripheral side of the decorative panel 8, and the housing 1 facing this opening 13 is
A partition wall 16 is provided inside the housing 1 so as to create a gap 15 between the housing 11 and the side wall 14 of the housing 11 . A cutout window 17 is an opening provided in the side wall 14 of the casing 11, and communicates with the gap 15 and the opening 13 of the decorative panel 8.

Numeral 18 is a bolt that fixes the casing 11 in the ceiling, and 19 is a spring that fixes the decorative panel 8 to the casing 11. FIG. 2 is a perspective view showing the appearance of the lighting fixture.

In the ceiling-embedded display lighting device configured as described above, the light emitted from the lamp 3 is transmitted directly or through the reflector 9.10.
The light is reflected by the light guide plate 1 and enters the light guide plate 1 from the upper end surface 2 of the light guide plate 1, and illuminates the display panel 6. Thereby, pictograms and the like printed on the display surface of the display board 6 can be recognized.

Here, when smoke is generated due to a fire or the like, the smoke flows along the interior ceiling of the room, but the decorative panel 8 is provided with an opening 13, and further has a gap 15 and a notch communicating with the opening 13. Since a window 17 is provided in the housing 11, the smoke will flow through the opening 13. It is discharged to the attic space through the gap 15 and the cutout window 17 as shown by the arrow.

That is, these openings 13. Since the air gap 15 and the cutout window 17 serve as a smoke outlet, the display board 6 of the display panel 7 indicating the evacuation exit, etc. on the lower side of the decorative panel 8 is not covered by smoke generated in the room and becomes invisible. prevention, the device's original function is not lost, and it is highly safe.

In addition, in the above embodiment, the opening 13 of the decorative panel 8
By providing a cavity 15 and a cutout window 17 in the casing 11 leading to this on the side of the display panel 7 opposite to the display board 6, indoor smoke can be guided to the back side of the display board 6.
The display on the display board 6 can be made easier to see.

[Effects of the Invention] As described above, according to the present invention, an opening is provided in the decorative panel to which the display panel is attached, and a cavity and an opening communicating with the opening are provided in the housing at a position opposite to the opening. Since the smoke generated in the room can be discharged to the attic through these openings and gaps, the original function of the appliance is not lost and high safety is achieved.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a ceiling-embedded display lighting fixture according to an embodiment of the present invention, FIG. 2 is a perspective view showing its removal, and FIG. 3 is a sectional view showing a conventional ceiling-embedded display lighting fixture. , FIG. 4 is a perspective view showing its appearance. 1...Light guide plate 2...Top end surface 3...Light source 4...Reflector plate 6...Display plate 7...・Display panel 8... Decorative panel 11... Housing 13... Opening 14... Side wall 15... Gap 16... . . . Partition wall 17 . . . Cutout window (opening) Note that the same reference numerals in the drawings indicate the same or corresponding parts.

Claims (1)

[Claims] A flat display panel consisting of a light guide plate placed on the back side of the display surface and a reflector plate placed on the back side of the light guide plate is fixed to the central part of the decorative panel attached to the ceiling surface by penetrating it. A linear light source is arranged on the upper end surface of the light plate, the lighting components of this light source are installed in a housing buried in the ceiling, and the light from the light source is made to enter the light guide plate to illuminate the display surface of the display panel. In the display lighting device, an opening is provided on the peripheral side of the decorative panel, a partition is provided inside the casing facing the opening so as to create a gap between the casing and the side wall of the casing, and the casing A ceiling-embedded display lighting fixture, characterized in that a side wall thereof is provided with an opening that communicates with the void.