JPH0330023Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a lighting device mounted on a study desk, etc., and more specifically, to a lighting device equipped with two fluorescent lamp lighting fixtures.

Conventional technology There are two types of desk lighting devices for study desks with shelves: straight tube fluorescent lamp lighting equipment that illuminates almost the entire desk surface, and incandescent lamp lighting equipment that serves as an auxiliary role for selectively partially illuminating the desk surface. It is common to have one. These two types of lighting equipment are installed under a shelf on a desk, and each is wired to an operation box with a built-in flashing switch installed at a different position on the desk to control the lighting.

An example of a study desk equipped with two types of lighting equipment and an operation box will be explained with reference to Figs. A plurality of shelf boards 2a, 2b...
are fixed with vertical shelf support plates 3, 3'... 4 is a lighting fixture for a straight tube fluorescent lamp attached to the center of the lower surface of one shelf board 2a; 5 is a shelf board 2a;
An incandescent lamp lighting fixture is attached to one end of the lower surface of the incandescent lamp, and reference numeral 6 is an operation box attached below another shelf board 2b of the shelf 2.

In the lighting fixture 4 for straight tube fluorescent lamps, numeral 7 denotes a rectangular box-shaped fixture body with a bottomed top opening that is screwed and fixed to the shelf board 2a, 8 denotes a lamp lighting means housed in the fixture body 7, and a ballast. 9. Glow starter 1
0, a commercial AC power source frequency selection switch 11. Reference numeral 12 denotes a straight tube fluorescent lamp mounted in a pair of sockets 13, 13 protruding from both front ends of the instrument body 7.

The incandescent lamp lighting fixture 5 is called a spot light, and includes a fixed seat 14 fixed to the lower surface of the shelf board 2a with screws, a flexible pipe-shaped arm 15 extending downward from the fixed seat 14, and an arm. A shade 16 attached to the tip of 15,
It consists of an incandescent lamp 17 housed in a shade 16.

The operation box 6 is commonly called an outlet box, and has, for example, two first and second outlets on the front.
Flashing switches 18, 19 and two service outlets 20, 20' are installed, and a power cord 22 connected to a commercial AC power source 21 extends from the rear. The first blinking switch 18 is connected to the lighting fixture 4 for straight tube fluorescent lamps with a two-wire wiring cord 23 to blink the straight tube fluorescent lamp 12, and the second blinking switch 19 is connected to the lighting fixture 5 for incandescent lamps. Connected by a two-wire wiring cord 24, an incandescent lamp 17
flash.

Problems to be Solved by the Invention The movable incandescent lamp lighting fixture 5 in the lighting device for a study desk increases the commercial value of the study desk by selectively illuminating the desk, but the incandescent lamp 17 When turned on, it became a heat source, heating up the space above the desk and causing discomfort to the user of the study desk. In particular, if the incandescent lamp 17 has a large wattage of 40 watts or 60 watts, the amount of heat generated when the lamp is turned on increases, and the discomfort of the user of the study desk increases. Incandescent lamp 1
7 may be used, but desk lighting using such a small watt incandescent lamp lighting fixture 5 inevitably has the disadvantage of insufficient illuminance.

Means for Solving the Problems The present invention provides a first lighting fixture for a straight tube fluorescent lamp, and a second lighting fixture having a shade in which a curved tube fluorescent lamp is housed at the tip of an arm, on a lighting fixture mounting support. and a lighting fixture, wherein a lighting ballast for a straight tube fluorescent lamp of the first lighting fixture and a curved tube fluorescent lamp of the second lighting fixture are installed in the fixture body of the first lighting fixture. The above-mentioned problem is solved by a lighting device in which the lighting ballasts are spaced apart from each other.

Effect The curved fluorescent lamp in the second lighting fixture has much brighter brightness and generates significantly less heat than an incandescent lamp with the same power consumption.
Therefore, if a second lighting fixture using this curved tube fluorescent lamp as a light source is used as a spotlight in a conventional study desk, a lighting device that does not have the above-mentioned problems can be realized. Furthermore, although the light sources of the first and second lighting fixtures are both fluorescent lamps, the ballast in the second lighting fixture is located within the fixture body of the first lighting fixture and is separated from the ballast for the first lighting fixture. Since the ballasts are arranged in such a manner that thermal interference between the ballasts can be prevented, heat generation of the second lighting equipment can be reduced, and the weight of the second lighting equipment can be reduced.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 to 5.

1 and 2 are front views and wiring diagrams of the lighting device installed on the shelf 2, which is the support for installing the lighting equipment on the desk 1 in FIG. This is the first lighting fixture for a straight tube fluorescent lamp, and the fixture main body 26 is screwed under the shelf board 2a.
and a straight tube fluorescent lamp 27 mounted on the front surface of the instrument body 26. 28 is a second lighting fixture for a curved tube fluorescent lamp attached to the shelf support plate 3 near one side of the first lighting fixture 25; It has a movable arm 30 extending downward from 29, a shade 31 attached to the tip of the arm 30, and a curved fluorescent lamp 32 housed in the shade 31. 32 is an operation box fixed under another shelf board 2b of the shelf 2, for example, two blinking switches 34, 35,
It has two service outlets 36, 36'.

The fixture body 26 of the first lighting device 25 is a long box-shaped sheet metal product with a bottomed upper end opening as shown in FIGS. 3 and 4, and has a pair of sockets protruding from both ends of the front surface. A straight tube fluorescent lamp 27 is attached to the lamps 37, 37, and two fluorescent lamps 27, 32 of the first and second lighting apparatuses 25, 28 are installed in the apparatus main body 25.
Two ballasts 38 and 39, which are lighting means, are fixedly arranged apart from each other, and the main body 25
Inside are two glow starters 40 and 41 which are other lamp lighting means, two frequency selector switches 42 and 43 of the commercial AC power supply 21, and a four-terminal connector 45 for wiring with the second lighting fixture 28. and are placed.

The arm 30 of the second lighting fixture 28 includes, for example, an L-shaped pipe 30a whose one end is connected to a fixed seat 29 so as to be able to swing from side to side, and a tightening screw 46 attached to the tip of the pipe 30a so as to be able to swing up and down. It is composed of a joint 30b that is rotatably connected, and a shade 31 is connected to the tip of the joint 30b.
The curved tube fluorescent lamp 32 housed in the shade 31 is a compact type having, for example, four glass bulbs or two U-shaped glass bulbs arranged close together to form a meandering discharge path. As shown in FIG. 5, it is detachably attached to a socket 47 built into the shade 31. A four-wire wiring cord 48 extends from the socket 47, passes through the arm 30, is led out from the fixed seat 29, and has a four-pin plug 49 connected to its tip. By inserting the plug 49 into the four-terminal connector 44 fixed to the appliance body 26 and making an electrical connection, the curved fluorescent lamp 32 connects the ballast 39 and the glow starter 41, as shown in FIG. Connected to the lighting circuit.

A two-wire power cord 5 is connected to the operation box 33.
0, a three-wire wiring cord 51 extends, and is connected to a commercial AC power source 21 with a power cord 50. A three-pin plug 52 is connected to the tip of the wiring cord 51, and this plug 52 is connected to a three-terminal connector. 45 and electrically connected, the AC power source 21 is supplied to the first and second lighting devices 25 and 28 via the flashing switches 34 and 35. That is, as shown in FIG. 2, one line of the wiring cord 51 is a common line that supplies the AC power supply 21 to the first and second lighting devices 25, 28, and the remaining two lines are the lines that supply the two blinking switches 34, 35. is connected, one flashing switch 3
4 controls the blinking of the straight tube fluorescent lamp 27, and another blinking switch 35 controls the blinking of the curved tube fluorescent lamp 32. By wiring in this way, the wiring work between the operation box 33 and the first and second lighting fixtures 25 and 28 can be easily performed, and the work of assembling the lighting device to the shelf 2 can be performed easily.

The fixture body 26 of the first lighting fixture 25 is longer than the entire length of the straight tube fluorescent lamp 27, and therefore the two ballasts 38 and 39 are arranged within this fixture body 26 with a sufficient distance. For this purpose, the instrument body 26
Even if the two ballasts 38 and 39 generate heat together when the lamp is lit, it is possible to suppress an undesired temperature rise within the appliance main body 26 due to the synergistic effect of heat between them.
Two stabilizers 38, 39 within one instrument body 26
can be placed without any thermal problems. Furthermore, by housing the ballast 39 and glow lamp 41 of the second lighting fixture 28 within the fixture body 26, the second lighting fixture 28, which is used as a spot light, has a simple design similar to that of an incandescent lamp spot light. It becomes easier to do.

Note that the present invention is not limited to the above-mentioned embodiment, and for example, the second lighting fixture 28 may be attached to the lower surface of the shelf board 2a, or may be configured to be movable left and right along the shelf board 2a. You can also do it. Furthermore, the main body of the first lighting fixture is not limited to a box shape, and can have any suitable configuration.

Furthermore, the present invention is not limited to lighting fixtures for study desks.

Effects of the invention According to the invention, in a lighting device in which a desk or the like is entirely illuminated by a first lighting fixture and selectively illuminated by a second lighting fixture, the light source of the second lighting fixture is a curved tube type. By using fluorescent lamps, there is no longer any problem of insufficient illuminance in the selected lighting area, such as the desk top, and the area near the light source of the second lighting fixture is not hot, causing discomfort to the desk user. It is possible to provide a lighting device with great commercial value that can provide comfortable illumination. In addition, since the two ballasts of the first and second lighting fixtures are arranged spaced apart from each other within the fixture body of the first lighting fixture, it is possible to suppress an undesired temperature rise within the fixture body, and By not disposing a ballast in the lighting fixture, flexibility in designing the second lighting fixture is increased, and thermal problems can also be reduced.

[Brief explanation of the drawing]

1 to 5 are for explaining one embodiment of the lighting device according to the present invention, FIG. 1 is a partial front view of a desk on which the lighting device is mounted, and FIG. 2 is the illumination device shown in FIG. 1. The electrical wiring diagram of the device, FIG. 3 is an enlarged exploded perspective view of the lighting device in FIG. 1, FIG. 4 is an enlarged bottom view of the main body of the first lighting fixture in FIG. 3, and FIG. It is an enlarged bottom view of the shade of a 2nd lighting fixture. Figures 6 to 8 are for explaining conventional lighting devices. Figure 6 is a perspective view of a desk on which the lighting device is mounted, and Figure 7 is an enlarged cross section taken along line A-A in Figure 6. 8 is an electrical wiring diagram of the lighting equipment in FIG. 6. 2... Support body, 25... First lighting fixture, 26...
...Appliance body, 27... Straight tube fluorescent lamp, 28...
...Second lighting fixture, 30... Arm, 31... Shade, 32... Curved tube fluorescent lamp, 38, 39...
stabilizer.

Claims (1)

[Scope of Claim for Utility Model Registration] A first lighting fixture for a straight tube fluorescent lamp, and a second lighting fixture having a shade in which a curved tube fluorescent lamp is housed at the tip of an arm, on a support for mounting the lighting fixture. A ballast for lighting the straight fluorescent lamp of the first lighting fixture and a ballast for lighting the curved fluorescent lamp of the second lighting fixture are installed in the fixture body of the first lighting fixture. A lighting device characterized in that containers are arranged spaced apart from each other.