JPS59163703A - Multilamp illuminator - 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 provides a multi-ring lighting system that allows dimming of a plurality of annular fluorescent rungs to be made different from each other, thereby improving the appearance and easily setting the illuminance of the illuminated surface below. Regarding lighting equipment for lights.

2. Description of the Related Art Conventionally, there are multiple lighting fixtures shown in FIGS. 1 and 2.

In the figure, 1 is the cord and 2 is the lighting fixture itself.

It is supported by the code 1. 3 is shade,
A large ring-shaped fluorescent lamp 4 is disposed in the main lighting device 2 and is located on the side far from the center point of the illumination surface, that is, on the upper side.
and a small annular fluorescent lamp 5 located near the center of the illuminated surface, that is, below. The annular fluorescent lamps 4 and 5 are arranged substantially concentrically.

The lighting fixture main body 2 also has a changeover switch 7 connected to the current electric power supply 6, and a dimmer 8 connected to the main power supply 6 via the changeover switch γ.

Choke coils 9 and 1o as ballasts are connected in series to the annular fluorescent lamps 4 and 5, respectively, and glow lamps 11.12% and 91jE are used for lighting. Reference numeral 13 denotes an all-party contact of the switch 7, which connects the choke coils 9 and 1.
Connected to 0. 14 is also the changeover switch 7.
It is connected to the light control device 8 through the contact point for light control.

In addition, the dimmer device 8 is composed of a phase control circuit using a fd thyristor, and the annular fluorescent lights 7 and 4 are lit in parallel.
+5 in series connection.

In this case, when the AC power supply 6 is turned on with the changeover switch 7 switched to the all-optical contact 13/1j.

Choke coil 9.10$ - Yohi glow lamp 11゜1
The upstream stream flows through the two lamps, and the glow lamps 11° and 12
is activated, high voltage is applied to the choke coils 9 and 10, and the annular fluorescent lamps 4 and 5 are turned on.

Next, when the changeover switch 7 is switched to the dimmer contact 14, the annular fluorescent lamp 4.5 is turned on via the iJ4 light device 8. The fluorescent lamps 4 and 5 are dimmable and lit.

However, in such conventional multi-lamp lighting equipment, the two annular fluorescent lamps 4 and 5 are lit in parallel via the dimmer 8, so the annular fluorescent lamps 4 and 5 are Both lights can be dimmed at the same intensity, so it is not possible to dim only one of them. Therefore, when the spotlight is placed deeply, the brightness of both of the two annular fluorescent lamps 4.5 decreases, resulting in the problem that when looking up at the lighting equipment from below, it feels dim, which tends to cause discomfort.

In addition, since the illuminance of the illuminated surface below the lighting equipment also decreases with dimming, it is extremely difficult to remove the illumination tube of the illuminated surface of the lighting equipment as necessary.

This invention was developed by focusing on the above-mentioned problems.
The luminous intensity of the annular fluorescent lamp placed 1' far from the center point of the illuminated surface directly below the luminaire is deepened using a spotlight, while the annular fluorescent lamp is placed close to the illuminated surface. #1 (Multi-light lighting fixture 1 that can keep the luminous intensity shallow to maintain a beautiful appearance and also suppress the decrease in illuminance of the illuminated surface due to dimming
[The purpose is to solve the above-mentioned conventional problems by providing the following.

Examples of the present invention will be described below.

2. The same reference numerals are given to the same or corresponding parts as in the conventional example, and the explanation thereof will be omitted.

FIG. 3 shows one embodiment of the invention.

In the figure, the dimmer 8 is connected in series to the lower annular fluorescent lamp 5, while the climate switch I is connected in parallel to the dimmer 8, and the full-light spot 13 of the change-over switch 7 is connected in parallel to the dimmer 8. It is open.

Here, if the AC power supply is used for 6 months with the selector switch 7 connected to the contact point 13 for the first time, the two ring-shaped fluorescent lamps 4 and 5 will be lit in full light condition. . Next, when the changeover switch 7' is connected to the dimming contact 141Uli, the lower annular fluorescent lamp 5 is in the full light state =! The annular fluorescent lamp 4 located on the upper side of the housing is lit in a dimming state according to the output of the dimming device 8.

In this way, the side located below 5 and close to the covered surface, that is,
Since the lower illumination lamp 5 is in full state and only the upper annular fluorescent lamp 4 which is far from the illuminated surface is dimmed, even if the annular lamp 4 is dimmed, the illuminance of the illuminated surface will not decrease. In addition, when the lower annular fluorescent lamp 5 is at full light, its brightness remains the same as before dimming, so even if you look up at the multi-light lighting fixture from below, it will not harm the aesthetic sense. There isn't.

Moreover, FIG. 4 shows another embodiment.

In the figure, the changeover switch 7 has two all-optical contacts 13,
15 and a dimming contact 14.

A dimming device 16 is provided on the lower annular fluorescent lamp 5.

8 is a light control device disposed on the output side of the light control device 16;
A choke coil 10 is connected to the upper annular fluorescent lamp 4 via a choke coil 10, and the output voltage of the dimmer 8 is used as an input voltage.

Here, all-optical contact i3. When the annular fluorescent lamps 4 and 5 are lit via isi, both lamps are in the full state. Therefore, when the changeover switch 7 is connected to the dimming contact 14, the two-ring type fluorescent lamps 4 and 5 are lit in a dimming state corresponding to the output of the dimming device t16. Incidentally, since the dimmer 8 receives all of the output from the dimmer 16, the upper annular fluorescent lamp 4 is turned on by further increasing the dimming level. That is, the dimming rate of the lower annular fluorescent lamp 50 is always lower than the afterglow rate of the upper fluorescent lamp 4.

In this way, even if two annular fluorescent lamps 4.5 are dimmed and turned on, the dimming rate of the lower annular fluorescent lamp 50 can be made smaller than that of the upper annular fluorescent lamp 4. The appearance is good, the discomfort is small, and the decrease in illuminance on the illuminated surface is also small compared to the rate of decrease in power. In addition, in the above example,
Arrangement of two annular fluorescent lamps 4 and 5? As shown in Fig. 1, a case is shown in which the annular fluorescent lamps 5 with small external dimensions are arranged concentrically with a step at the bottom, but it is also possible to combine annular fluorescent lamps with different ratings. . For example, 30W
The same combination of type and 40W type topographic fluorescent lamp -P
When placing an annular fluorescent lamp with an irregular outer diameter on the upper side and an annular fluorescent lamp with a large external diameter on the lower side, it is possible to The same effect as described above can be obtained by making the attenuation rate of the annular fluorescent lamp with the smallest distance smaller than that of the other annular fluorescent lamps. Also, is it an annular fluorescent lamp with the same outer diameter? A similar effect can be obtained even when a step is provided on the same axis and the I6 is disposed above and below.

Furthermore, the changeover switch 7 for switching between the two annular fluorescent lamps 4 and 5 gold full-light lighting 2 and footlight lighting is not limited to the one shown in the embodiment, but can be used for all switching contacts of an AC power source commonly used in lighting equipment. A multi-stage pull switch or the like may be used, or other means may be used.In short, any device that can at least switch the fluorescent lamps between all lights and spotlights is sufficient. Other than the combination of the choke coil type ballast and the dimmer shown in these embodiments, there are other devices for lighting two fluorescent lamps at full power or in a dimmed manner.

For example, it may be possible to use an inverter or the like to turn on two fluorescent lamps at a high frequency and to control the dimming. In addition,
One inverter may be a device that can light two fluorescent lamps. Furthermore, the number of fluorescent lamps is limited to two.
Similar effects can be obtained with lights or higher.

As explained above, according to the present invention (the configuration i
, Ti, in a multi-lamp lighting fixture comprising a plurality of annular fluorescent lamps arranged in close concentric circles and having different distances from the center of the illuminated surface, the center of the illuminated surface among the plurality of annular fluorescent lamps. The annular fluorescent lamp located on the side far from the point has more dimming devices than the annular fluorescent lamp located on the side closer to the center point of the illuminated surface, and these are connected in series to reduce the attenuation rate. Since this is a multi-lamp lighting fixture that can be made thicker, it is possible to maintain the illuminance of the illuminated surface during the daytime with the same lamp power, and it does not spoil the aesthetic appearance of the lighting equipment as with conventional lamps. Is it a remarkable effect that it no longer gives you an unpleasant feeling? play.

[Brief Description of the Drawings] Fig. 1 is a cross-sectional explanatory diagram of a conventional multi-lamp lighting fixture to which the present invention can be applied, Fig. 2 is a circuit diagram of the multi-lamp lighting equipment shown in Fig. 1, and Fig. 3 4 is a circuit diagram of a multi-lamp lighting fixture according to the present invention, and FIG. 4 is a circuit diagram showing another embodiment of the present invention. 2...Lighting equipment body 4.5...Annular fluorescent lamp 7...Switch switch 8.16...Dimmer control device 9.10...Choke coil agent Kazuno Kazuno (Tyoka 1 person) 21 Figure 3

Claims (1)

[Claims] In a multi-lamp lighting fixture comprising a plurality of annular fluorescent lamps that are arranged close to each other in a substantially concentric circle and have different short term 1 from the center point of the illuminated surface, the center point of the illuminated surface among the plurality of annular fluorescent lamps is provided. The annular fluorescent lamp located on the far side from the irradiated surface is connected in series with more dimmer devices than the annular fluorescent lamp located at 1i111 near the center point of the illuminated surface so that the light attenuation rate can be increased. A multi-light lighting fixture featuring: