JPH04272602A - Lighting fixture for multiple lamp - Google Patents

Abstract

PURPOSE:To enable thinned-out lighting of lamps and also prevent each lamp from being blackened as it is attached or removed by arranging lamp sockets in parallel in their vertical direction, and making the direction of the lamp receiving plate of one lamp socket different by 90 degrees from that of the lamp receiving plate of the other lamp socket, and providing an exclusive lighting circuit for each straight bulb lamp. CONSTITUTION:Lamp sockets 8, 9 are provided while in a parallel, vertically- spaced relation to each other on the respective opposite walls 1a, 1b of a fixture main body 1 having its lower face opened and the lamp receiving plate 11 of the socket 8 has its direction made to differ by an angle of 90 degrees from that of the lamp receiving plate 13 of the socket 9. Two straight bulb lamps 16, 17 are mounted over the sockets 8, 9 and an exclusive lighting circuit is provided for each lamp 16, 17. Thereby thinned out lighting of lamps can be performed as needed and also the lamps can be easily attached and removed and it is made possible to prevent each lamp from being blackened as it is attached or removed.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention provides a plurality of straight tube fluorescent lamps each having a cap at both ends in a device body with an open bottom surface, and is used for illuminating offices, stores, etc. Regarding multi-light lighting equipment.

0002

[Prior Art] This kind of conventional lighting equipment has a reflector built into the equipment main body with an open bottom surface, a lighting circuit is attached, and two straight tube fluorescent lamps, for example, are installed inside the equipment main body. are arranged parallel to the open lower surface of the instrument body. As the lighting circuit for lighting these fluorescent lamps, a two-lamp series sequential starting type lighting circuit is generally used, which has low secondary voltage per lamp and is economical.

0003

SUMMARY OF THE INVENTION In a multi-lamp lighting fixture, it would be convenient if, in addition to normal lighting in which all the lamps are turned on, it would be possible to perform thinned-out lighting in which some of the lamps are turned off, as this would allow power savings if necessary.

However, in the conventional multi-lamp lighting equipment using straight tube fluorescent lamps, two straight tube fluorescent lamps are lit by a two-lamp series sequential start type lighting circuit. This lighting circuit cannot be turned on unless two straight tube fluorescent lamps are set. For this reason, there was a problem in that it was not possible to save power while turning on the lights. Therefore, when a large number of this type of multi-light fixtures are connected in a straight line to illuminate an office, etc., the only option is to turn off every other or every second fixture to save power. If this is done, the brightness of the illumination will become uneven, so it is necessary to install a light control device to reduce this difference in illumination. In this case, there is a problem that equipment costs increase. Moreover, due to the difference in illumination, there is also a problem that the brightness of the ceiling surface on which the fixtures are installed becomes non-uniform. Furthermore, the straight tube type fluorescent lamp that is turned off is exposed at the open bottom of the instrument body and is easily visible, resulting in an unsightly appearance of the instrument.

[0005] The object of the present invention is to make it possible to save power by thinning the lighting as needed, to improve the appearance of the appliance during the thinning lighting, and to easily attach and detach a straight tube type fluorescent lamp. To obtain a multi-lamp lighting fixture capable of preventing straight tube fluorescent lamps from turning black due to their attachment and detachment.

[0006]

[Means for Solving the Problems] In order to achieve the above-mentioned object, the multi-light lighting fixture of the present invention includes a fixture main body whose bottom surface is open, one wall facing each other and the other wall of the fixture main body. each has a lamp receiving plate arranged vertically at intervals with respect to the lower surface and provided with a pair of pin insertion holes, and the lamp receiving plates are oriented at 90 degrees with respect to each other.
The lamp sockets each have a plurality of lamp sockets provided at 0 degrees difference, each having a cap with a lamp pin protruding from both ends, and the pins of the lamp socket are attached to the same height position on both walls to form a pair. Insert the lamp pin into the insertion slot,
A plurality of straight tube fluorescent lamps are removably installed across the pair of lamp sockets, and a device dedicated to each of the plurality of fluorescent lamps is connected to the pair of lamp sockets. It is equipped with a plurality of lighting circuits attached to the main body.

[0007]

[Operation] In the structure of the present invention, each of the plurality of straight tube fluorescent lamps has a dedicated lighting circuit, and these lighting circuits can independently light the fluorescent lamps. While the fluorescent lamps located above continue to be lit, the fluorescent lamps above this can be turned off as necessary to perform thinned-out lighting. In this thinning lighting, the fluorescent lamps that are turned off are located directly above the lowest fluorescent lamp that is lit, and are hidden by the fluorescent lamps that are lit, and in addition, Since the fluorescent lamp located at the bottom is lit and shining, it is difficult to see the fluorescent lamp when it is turned off. In addition, since multiple straight tube fluorescent lamps are arranged vertically side by side, when the lamp in the upper position is attached or removed, the lamp pin of this lamp is attached to the straight tube fluorescent lamp located in the lower position. Move while pushing the lamp receiving plate of the lamp socket that supports the light lamp. However, the lamp receiving plates of the lamp sockets that are arranged side by side with their positions shifted in the vertical direction differ from each other by 90 degrees (in other words, the lamp receiving plates have a straight line connecting the pair of pin insertion holes that the lamp receiving plates have). ), the lamp pin of the fluorescent lamp to be installed and removed moves while pushing the socket receiving plate of the lower lamp socket as described above. At this time, there is little possibility that the fluorescent lamp inserted into the pin insertion hole of the receiving plate and attached/detached will be electrically connected across the two lighting circuits.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. In FIGS. 1 to 3, reference numeral 1 denotes a main body made of sheet metal that is embedded and fixed in the ceiling, and has a substantially rectangular parallelepiped shape, and its lower surface is open. The lower edge 2 of this main body 1 is projected outward and comes into contact with the lower surface of the ceiling plate 3, as shown in FIG.

As shown in FIG. 1, a horizontal crosspiece 4 is horizontally suspended in the upper part of the instrument main body 1 and extends across side walls 1a and 1b that are opposite to each other in the width direction. A plurality of horizontal bars 4 are provided at intervals in the length direction of the instrument body 1. A reflecting plate 5 housed in the upper part of the instrument body 1 is fixed to each horizontal beam 4 with screws 6. The reflector plate 5 has substantially the same length as the instrument body 1, and is shaped to open toward the open lower surface of the instrument body 1. In addition, the side walls 1a, 1 of the device main body 1
V-spring hooks 7 are fixed to the inner surfaces of b, respectively.

End walls 1 facing each other in the length direction of the instrument body 1
c and 1d (see Figure 2) each have two lamp sockets 8.
, 9 are installed. As shown in FIG. 1, these sockets 8 and 9 are arranged in parallel at intervals in the vertical direction with respect to the open lower surface of the instrument body 1. The upper lamp sockets 8 each have a lamp receiving plate 11 provided with a pair of pin insertion holes 10, and similarly the lower lamp sockets 9 each have a lamp receiving plate 1 provided with a pair of pin insertion holes 12.
It has 3. Each of the lamp receiving plates 11 and 13 is movably provided by a spring 14, as represented by the lamp receiving plate 11 shown in FIG. 15 are stored.

The lamp receiving plate 11 of the upper lamp socket 8 is located in a pair in the length direction of the appliance body 1, and the lower lamp socket 9 is also located in a pair in the length direction of the appliance body 1. The directions of the lamps and the lamp receiving plate 12 are different from each other by 90 degrees. That is, in the case of this embodiment, as shown in FIG. 1, the lamp receiving plate 11 is provided so that the pair of pin insertion holes 10 are lined up in the horizontal direction, and the lamp receiving plate 11 is provided so that the pair of pin insertion holes 12 are lined up in the vertical direction. A lamp receiving plate 13 is provided.

A straight tube type fluorescent lamp 16 is removably attached to the upper lamp socket 8, and a straight tube type fluorescent lamp 17 is detachably attached to the upper lamp socket 9. Ready to be installed. These two upper and lower fluorescent lamps 16, 17 each have a base 19 with lamp pins 18 projecting from both ends, as represented by the fluorescent lamp 16 shown in FIG. These fluorescent lamps 16 and 17 are attached by inserting their lamp pins 18 into the pin insertion holes 10 or 12, and are arranged inside the reflector plate 5.

As shown in FIG. 1, a lighting device 20 is attached to the inner surface of the ceiling wall 1e of the appliance body 1. As shown in FIG. 4, this lighting device 20 includes a first lighting circuit 21 for lighting only the upper fluorescent lamp 16, and a second lighting circuit 22 for lighting only the lower fluorescent lamp 17. It is formed from. These lighting circuits 21,
Reference numeral 22 has the same configuration, and includes an oscillation circuit 24 that includes transistors (not shown) and obtains high-frequency power from a commercial AC power source 23, and a transformer 25 that boosts the high-frequency power. The lamp 16 or 17 is turned on.

A frame 26 is attached to the lower part of the instrument body 1 to cover the lower edge 2 thereof. The frame body 26 has a V
A V spring 28 is attached via a spring attachment fitting 27. The V-spring 28 is removably engaged with the V-spring hook 7 from below, and the frame 26 is attached by this engagement.

A light control device 29 disposed at the bottom of the instrument body 1 is supported on the frame 26 . This light control device 29
is a pair of left and right reflectors 3 extending in the length direction of the instrument main body 1.
0 and a plurality of mutually parallel louver plates 31 horizontally suspended across these reflecting plates 30. The pair of reflecting plates 30 are arranged in a V-shape so as to open toward the open lower surface of the instrument body 1, and one of the reflecting plates 30
The upper edge is close to the lower edge of one of the reflecting plates 5, and the upper edge of the other reflecting plate 30 is also close to the lower edge of the other reflecting plate 5. In FIG. 1, reference numeral 32 indicates positioning pins protruding from the inner surfaces of the end walls 1c and 1d, which engage with the outer surface of the reflector plate 30 to position the light control body 29.

In the ceiling-mounted lighting fixture constructed as described above, the upper fluorescent lamp 16 can be turned on or off independently by the first lighting circuit 21 of the lighting device 20, and the second lighting circuit 22 can independently turn on or off the upper fluorescent lamp 16. The lower fluorescent lamp 17 can be turned on or off independently. Therefore, during normal use, the upper and lower fluorescent lamps 16,
17 is turned on, the lower part of the device can be illuminated by the combined light of the light emitted directly downward from these lamps 16 and 17 and the light reflected by the reflectors 5 and 30 and directed downward. Note that since this device is equipped with a light control body 29, glare can be cut by the light control body 29 at a light blocking angle of about 30 degrees.

In order to save power, it is sufficient to turn off the first lighting circuit 21 and turn off only the upper fluorescent lamp 16 while keeping the lower fluorescent lamp 17 lit. In this way, thinning lighting is possible. In this thinning lighting, the upper fluorescent lamp 16 that is turned off
is covered by the lower fluorescent lamp 17 located directly below this, and since the fluorescent lamp 17 is lit, it is difficult to visually recognize the upper fluorescent lamp 16.

Fluorescent lamp 16 turned off in this way
Since visibility is poor, the appearance of the fixture can be improved when the lighting is thinned out. Moreover, in the case of this embodiment, since the light blocking body 29 is provided with a light shielding angle of about 30 degrees, it is made more difficult to visually recognize the upper fluorescent lamp 16 when it is turned off.

[0019] Therefore, when using these lighting fixtures arranged in a straight line on the ceiling of an office or the like, by thinning out the lights as described above, every other or every second fixture can be turned off. Since there is no need to save electricity, the brightness of the lighting will not be uneven, and there will be no need for a dimming device to reduce uneven lighting differences. Brightness can also be made uniform.

In addition, in this device, in order to install the upper fluorescent lamp 16 with the light control body 29 removed,
First, as shown in FIG. 2, the lamp 16 is tilted and introduced into the appliance main body 1 through the open bottom part thereof, and the lamp pin 18 on the sloped upper end side of the lamp 16 is inserted so that one of the opposing upper lamp sockets 8 Insert into the pin insertion opening 10 of the lamp receiving plate 11 provided. Next, using this one lamp socket 8 as a fulcrum, the other end of the lamp 16 is pushed up in the direction of arrow A in FIG. 2 to make the lamp 16 horizontal. Finally, the lamp pin 18 at the other end of the lamp 16 is inserted into the pin insertion hole 10 of the other lamp socket 8. Then, the lamp receiving plate 11 of each lamp socket 8 is attached to the spring 14.
With this force, they approach each other and pinch the lamps 16, and the upper fluorescent lamp 16 is attached.

When the fluorescent lamp 16 is moved in the direction of the arrow A as described above, the lamp pin 18 at the other end of the lamp 16 is connected to the lamp located diagonally below with respect to the upper lamp socket 8. Lamp receiving plate 13 of socket 9
When passing through the lamp while pushing , no overcurrent flows through the filament of the lamp 16.

That is, the above-mentioned mounting operation of the upper fluorescent lamp 16 is carried out through the pair of pin insertion holes 1 of the lamp socket 8.
It is done according to the arrangement of 0. That is, in this embodiment, the fluorescent lamps 16 are oriented so that the lamp pins 18 are lined up horizontally, but the pair of pin insertion holes 12 of the lower lamp socket 9 are oriented vertically. Therefore, as the lamp pin 18 moves in the direction of the arrow A, the lamp pin 18 passes through a position shifted from the pair of pin insertion openings 12. Therefore, the lamp pin 18 is inserted into the pin insertion hole 12.
There is very little risk of it being inserted by mistake.

By the way, for example, the lower lamp socket 9
If the lamp receiving plate 13 is provided so that the pin insertion holes 12 are arranged vertically, the pin insertion holes 12 are located on the path through which the lamp pins 18 pass. There is a very high possibility that it will be inserted incorrectly. If such a state were to occur, the transformer 2 of the first and second lighting circuits 21 and 22 would appear on the circuit.
5, the fluorescent lamp 16 is connected as shown by the two-dot chain line in FIG. Therefore, the lighting device 20 is in an unloaded state with the power supply 23 being input, and the normal 3
Approximately twice as much voltage (12V) is applied. However, since the filament resistance of the fluorescent lamp 16 is small, an overcurrent flows through the filament, and as a result, the emitter of the filament disappears, the filament generates abnormal heat, and the fluorescent lamp 16 instantly turns black. do.

However, in this lighting fixture, as described above, when attaching and detaching the upper fluorescent lamp 16, there is very little risk that the lamp pin 18 will be mistakenly inserted into the pin insertion hole 12, so the filament is inserted into the filament as described above. There is little risk that the fluorescent lamp 16 will instantly turn black due to overcurrent flowing. At the same time, since incorrect insertion of the lamp pin 18 is prevented as described above, the upper fluorescent lamp 16 can be easily attached and detached.

Note that the present invention is not limited to the above embodiment. For example, three or more straight tube fluorescent lamps may be used, and a plurality of straight tube fluorescent lamps may be used, with the lowest straight tube fluorescent lamp being arranged parallel to the open bottom surface of the device body, and each of these lamps The present invention can also be applied to lighting equipment in which at least one straight tube fluorescent lamp is disposed above each lamp.

[0026]

[Effects of the Invention] In the multi-lamp lighting fixture of the present invention described in detail above, one wall and the other wall of the fixture main body, each of which is open at the bottom and facing each other, are provided with a wall in a direction perpendicular to the bottom face. A plurality of lamp sockets are arranged in parallel at intervals, the lamp receiving plates of each of these sockets are oriented 90 degrees from each other, and each of a plurality of straight tube fluorescent lamps is installed across these sockets. Since dedicated lighting circuits have been installed in the 2000, these circuits allow the lowest fluorescent lamp to continue lighting, while the fluorescent lamps above it can be turned off as necessary, making it possible to perform thinning lighting. Since the fluorescent lamp that is turned off can be made difficult to see due to the lit lamp below, the appearance of the appliance can be improved. Moreover, as mentioned above, the orientation of the lamp receiving plates of each lamp socket that supports multiple straight tube fluorescent lamps at intervals in the vertical direction differs by 90 degrees, and when the lamps are attached or detached,
There is little risk that the lamp pin of the lamp being inserted or removed will accidentally enter the pin insertion hole of the lamp receiving plate of another lamp socket, making it easier to install or remove the fluorescent lamp, and prevent the lamp pin from being inserted into the pin insertion hole by mistake as described above. Since the fluorescent lamps are rarely connected to each other, the fluorescent lamps that are installed and removed will not be electrically connected across the two lighting circuits, thus preventing the straight tube fluorescent lamps from turning black when the lamps are installed and removed. can.

[Brief explanation of the drawing]

FIG. 1 is a partially cross-sectional view of a ceiling-embedded multi-light lighting fixture according to an embodiment of the present invention, as viewed from the direction of arrow Z in FIG.

FIG. 2 is a schematic cross-sectional view for explaining the installation procedure of the fluorescent lamp of the same embodiment.

FIG. 3 is a perspective view showing the entire multi-light lighting fixture of the same embodiment.

FIG. 4 is a diagram showing an electric circuit of the multi-light lighting fixture of the same embodiment.

[Explanation of symbols]

1... Appliance body, 8, 9... Lamp socket, 10, 12...
Pin insertion hole, 11, 13... Lamp receiving plate, 16, 17...
Straight tube fluorescent lamp, 18... lamp pin, 19... base,
21, 22...Lighting circuit.

Claims (1)

[Claims] Claim 1: A device body having an open bottom surface, and a device body arranged in parallel at intervals in a direction perpendicular to the bottom surface on one wall and the other wall of the device body that face each other, respectively. , has a lamp receiving plate provided with a pair of pin insertion holes, a plurality of lamp sockets provided with the lamp receiving plates oriented 90 degrees apart from each other, and bases each having lamp pins protruding from both ends. and a plurality of lamp pins that are detachably attached across the paired lamp sockets by inserting the lamp pins into the pin insertion holes of the paired lamp sockets that are attached at the same height position on both walls. a plurality of straight tube fluorescent lamps, and a plurality of lighting circuits dedicated to each of the plurality of fluorescent lamps and connected to the pair of lamp sockets and attached to the apparatus body. lighting equipment.