JPH0143440B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a multi-lamp discharge lamp lighting device for lighting a plurality of discharge lamps simultaneously.

(Prior Art) Generally, as this type of multiple discharge lamp lighting device, a chandelier type lighting fixture using fluorescent lamps is known. In conventional multi-discharge lamp lighting devices like this, a ballast is prepared for each lamp, and the ballast is installed in the central body of the device, or the discharge lamps are placed inside the lamp installed around the ballast. It was set up with

In addition, as another conventional device, electronic ballasts that light discharge lamps at high frequency using high-frequency inverters have recently come into use, so it is possible to light multiple discharge lamps with one electronic ballast. It is possible that

(Problems to be Solved by the Invention) However, in the former type, the number of ballasts increases as the number of lights increases, which is disadvantageous in terms of size and weight reduction.

Furthermore, in the latter case, electronic ballasts must be configured according to the number of lights, which makes the design, manufacturing and management troublesome, and inevitably increases the cost accordingly.
In other words, if the number of lights is different, the circuit configuration will naturally be different, and the mounting structure on the wiring board etc. will also be different.
It is necessary to manufacture electronic ballasts for 3 lights, 4 lights, and 5 lights depending on the number of lights, for example. In addition, if a common electronic ballast is used,
Wiring to each discharge lamp (lamp) tends to be congested, making wiring work troublesome and prone to miswiring.

The present invention has been made in order to solve the problems of the above-mentioned conventional technology. The object of the present invention is to provide a multi-lamp type discharge lamp that can be used in a variety of ways, is easy to design, manufacture and manage, and is therefore inexpensive, and is also easy to wire and is less prone to miswiring. .

[Structure of the Invention] (Means for Solving the Problems) The present invention comprises a constant current type high frequency generator and a plurality of radiators, at least two of which are connected in series with each other and are lit by the output of the high frequency generator. The components of the constant current type high frequency generator are arranged in the center of a polygonal wiring board, and the output terminals for each discharge lamp are distributed on each side of the wiring board and are arranged along the edges. The feature of the structure is that it is arranged as follows.

(Function) By using a constant current type high frequency generator, the present invention can change the number of discharge lamps without changing the main circuit, and the output terminal can be used or shorted. For example, if a common high frequency generator is manufactured, it can be used for 3 lights, 4 lights, etc.
Can be shared for 5 lights. Therefore, it is easy to design, manufacture and manage. Furthermore, since it is possible to adapt to different forms of lighting equipment, design, manufacture, and management are further facilitated from this point of view. Furthermore, since the output terminals for each discharge lamp are distributed on each side of the wiring board and arranged along the edges, it is easy to identify the output terminal for each discharge lamp, which makes wiring work easier. As a result, wiring errors are less likely to occur.

(Example) The present invention will be described below with reference to an example shown in the drawings. FIG. 1 shows the circuit configuration of an electronic multi-discharge lamp lighting device according to the present invention. In the figure, 11 is a commercial AC power supply, 12 is a rectifier, and the positive side of the DC side Electric circuit P is constant current reactor 1
3, and the one-side electric circuit N is directly connected to a constant current type high frequency generator, that is, an inverter 14 in this embodiment. The inverter 14 has a pair of transistors 15 and 16 connected in a push-pull manner, the collectors of which are connected to the primary windings 17a and 17 of an inverter transformer 17, which is an insulated transformer.
Connect to the winding start end and winding end of b. Further, the emitters are connected in common and connected to the electric line N. Further, the base is connected to the electric line P via a starting resistor 18. A resonant capacitor 19 is provided between both ends of the primary windings 17a and 17b, and an electric line P is provided at the midpoint.
Connect. In addition to the primary windings 17a and 17b, a feedback winding 17c is provided on the primary side of the inverter transformer 17, and its ends are connected to the bases of the transistors 15 and 16 to form a positive feedback circuit. to maintain oscillation. Further, a secondary winding 17d and a filament power supply winding 17e are provided on the secondary side of the inverter transformer 17 to supply power to a group of discharge lamps to be described later.

At least two of the discharge lamp groups are connected in series, and this embodiment shows an example of a multi-lamp lighting circuit with six lamps. Further, the six discharge lamps are divided into two groups as shown in the figure, three lamps in each group are connected in series, and each group is connected in parallel. That is, discharge lamps 21A, 21B, 21C
3-lamp series circuit and discharge lamps 21D, 21E,
A three-lamp series circuit using 21F is connected in parallel via a balancer transformer 22 provided at one end.
The parallel connection point is the inverter transformer 17
is connected to both ends of the secondary winding 17d. Also, among the above discharge lamps, codes 21B, 21C, 21E, 21F
The ones shown are starting capacitors 24B, 24C, 2
4E and 24F are connected in parallel, which assists in starting. 26 is a filament transformer, the primary winding 26a of which is connected to the filament power supply winding 17e of the inverter transformer 17. Moreover, on the secondary side, seven filament windings 26b, 26c, 26d, 26e, 26f, 26
g, 26h are provided, and each of the discharge lamps 21A, 21
The filaments B, 21C, 21D, 21E, and 21F are connected to the ends of the circuit with the same reference numerals, and each filament is preheated. Each of the above filament circuits has two types: one in which two filaments are connected in parallel, and one in which two filaments are connected in series.
However, the corresponding filament winding is set so that twice the voltage of the former is applied to the latter. Consequently, each filament is preheated to the same voltage.

In the discharge lamp lighting device configured as described above, AC power supplied by turning on a power switch (not shown) is first converted into DC power by the rectifier 12, and then reversely converted into high frequency power by the inverter 14. , its output is inverter transformer 1
7 and filament transformer 26 to each of the discharge lamps 21A to 21F, preheating each filament and starting and lighting the filament. The inverter 1
4 is a constant current high frequency generator which uses a leakage transformer in its inverter transformer 17 to have constant current characteristics, and a constant current flows through each of the discharge lamps 21A to 21F. In other words, the lighting state is the same as when using a conventional ballast.

Here, each of the discharge lamps 21A to 21F is configured to be separable from the lighting circuit by terminals 28A to 28F, respectively. Also, capacitors 24B, 24C, 24
E, 24F also have terminals 29B, 29C, 29 respectively.
E, 29F is configured to be separable from the lighting circuit.

FIG. 2 shows a state in which the multi-discharge lamp lighting device configured as described above is mounted on a wiring board.
This will be explained below. In the figure, 31 is a printed circuit board as a wiring board, which is formed into a hexagonal shape, for example, as shown in the figure. In the center thereof, various components constituting the inverter 14, a balancer transformer 22, a filament transformer 26, etc. provided in the output circuit thereof are arranged. Furthermore, terminals 28A to 28F are provided in the peripheral portion for attaching the discharge lamps 21A to 21F in a separable manner. Starting capacitors 24B, 24C, 24E, and 24F are also arranged near the corresponding discharge lamps 21B, 21C, 21E, and 21F. This starting capacitor 24B, 24C, 2
Although illustrations of 4E and 24F are also omitted, they are configured to be separable by the terminals 29B, 29C, 29E, and 29F explained in FIG.

FIG. 3 shows a case where the lamp is used for five lamps, and the discharge lamp 21F and the corresponding starting capacitor 24F shown in FIGS. 1 and 2 are removed. A short-circuit conductor 33 is then connected between the terminals 29F from which the starting capacitor 24F has been removed. Figure 4 is 4
In the case of a lamp, the discharge lamps 21F and 21C and the corresponding starting capacitors 24F and 24C are removed, and the terminal 29F of the removed starting capacitor is
A short-circuit conductor 33 is connected between the terminal 29C and the terminal 29C. Figure 5 shows the case of three lamps, discharge lamp 21F,
21C, 21E and starting capacitors 24F, 24
Remove C, 24E and connect terminal 29 of the starting capacitor.
Short-circuit conductor 3 between F, terminal 29C, and terminal 29E
Connect 3. FIG. 6 shows a case for two lamps, in which discharge lamps 21A and 21D are left behind, and all other discharge lamps and starting capacitors are removed, and short-circuit conductors 33 are connected between the terminals of all the starting capacitors.

In this way, by designing the printed circuit board 31 for 6 lamps, you can easily add or remove discharge lamps and starting capacitors from 2 lamps to 6 lamps, and connect short-circuit conductors between the terminals of unused capacitors. It can be selected arbitrarily. In this case, the inverter 14
exhibits constant current characteristics due to the leakage inductance of the inverter transformer 17, and there is no significant difference in lamp current between two lamps and six lamps, and the same light output can be obtained. This means that the printed circuit board 31 and the main parts installed therein can be used in common from 2 lights to 6 lights, and can also be applied to lighting fixtures of various designs.
This is a major advantage from a manufacturing and management perspective. In addition, the components of this high-frequency generator are provided in the center of the polygonal wiring board, and the output terminals for each discharge lamp are distributed on each side of the wiring board and arranged along the edges. When installed in such a multi-lamp type lighting fixture, it is easy to understand the correspondence between the output terminal and each discharge lamp (lamp), so wiring work is easy and wiring errors are less likely to occur.

In addition to the above-mentioned constant current type high frequency generator, for example, a device that obtains constant current characteristics through negative feedback control may be used.

[Effects of the Invention] As described above, the present invention uses a constant current type high frequency generator, and the components of this high frequency generator are provided in the center of a polygonal wiring board, and the output terminals for each discharge lamp are provided at the center of the polygonal wiring board. Since they are distributed on each side of the wiring board and arranged along the edges, it is easy to understand the correspondence between the output terminals and each discharge lamp (lamp) when installed in a multi-lamp type lighting fixture such as a chandelier. Wiring work is easy and incorrect wiring is less likely to occur. In addition, the high-frequency generator can be used in common even if the number of lights changes, and can be applied to lighting equipment of various designs, so the number of parts for the lighting device can be reduced, making design, manufacturing, and management easier. As a result, prices can be lowered.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram showing an embodiment of a multi-discharge lamp lighting device according to the present invention, FIG. 2 is a plan view showing the state in which the circuit shown in FIG. 1 is mounted on a wiring board, and FIG.
4, 5, and 6 are circuit diagrams showing cases in which the circuit shown in FIG. 1 is changed to one for five lamps, one for four lamps, one for three lamps, and one for two lamps. 14... Constant current type high frequency generator, 21A, 2
1B, 21C, 21D, 21E, 21F...discharge lamp, 22...balancer transformer, 24B, 24
C, 24E, 24F...Starting capacitor, 28
A, 28B, 28C, 28D, 28E, 28F...
...Discharge lamp terminal, 29B, 29C, 29E, 29
F...Terminal for capacitor, 31...Printed circuit board as wiring board, 33...Short-circuit conductor.

Claims (1)

[Scope of Claims] 1. A constant current type high frequency generator; and a plurality of discharge lamps, at least two of which are connected in series and lit by the output of the constant current type high frequency generator; The generator has its components arranged in the center of a polygonal wiring board, and the wiring board has output terminals for each discharge lamp distributed on each side and arranged along the edges. A multi-discharge lamp lighting device characterized by: 2. Claim 1, wherein the plurality of discharge lamps are divided into two sets, each connected in series, and each set connected in parallel via a balancer transformer. The described multi-discharge lamp lighting device. 3. The multi-discharge lamp lighting device according to claim 1 or 2, wherein the wiring board is formed of a printed circuit board. 4. The wiring board according to any one of claims 1 to 3, wherein the wiring board has a hexagonal shape, and terminals for each of the discharge lamps for six lamps are formed in the peripheral part. Light-shaped discharge lamp lighting device. 5. Multi-lamp discharge lamp lighting according to any one of claims 1 to 4, wherein the constant current type high frequency generator is equipped with an isolation type transformer having leakage inductance. Device.