JPS6233217Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a discharge lamp lighting device and aims to improve workability when mounting and wiring electrical components on a board.

The fixture 1 of the discharge lamp lighting device for fluorescent lamps etc. has dimensions a and b as shown in Fig. 1 because the discharge lamp itself is long.
On the other hand, the dimension 1 is very large and most of them have an elongated shape, and this dimension 1 can be determined relatively freely according to the discharge lamp. However, as shown in Fig. 2, the actual device 1 has a hole 2 (about 18 mm in diameter) for leading in the power line in the center, and a hole 2 located longitudinally away from this hole 2 by a distance c. , bolt holes 3 for attaching the appliance 1 are usually drilled in two places, and the dimension c is often 600 mm for 110W appliances and 300 mm for 40W appliances. In this case, the installation position of the circuit unit that incorporates the electrical components that make up the lighting circuit is within the broken line in Figure 2, that is, A or A', but in reality it is installed so that there is no problem during installation work. Therefore, the dimension A or A' cannot be made longer than about (dimension c - 100) mm.

On the other hand, if a discharge lamp lighting circuit employing an inverter system with the configuration shown in Fig. 4 is incorporated into a long and narrow appliance 1 with a thin cross section as described above and commercialized, the total length will be as much as 600 mm. It will end eventually. Therefore, in order to incorporate this into the device 1, it is necessary to re-drill the central power line lead-in hole 2 to another hole, which poses a problem in terms of the versatility of the device 1. In addition, in inverter type lighting devices, most of the electrical components are usually mounted on a printed circuit board and printed wiring, but a printed circuit board that is too long and thin is disadvantageous in terms of manufacturing and manufacturing equipment. It is also conceivable that the yield will be poor due to the cutting process from the original board of the printed circuit board.

Therefore, if the entire circuit is divided into two parts and each part is installed on a separate printed circuit board, the degree of freedom when accommodating the circuit in the device 1 is increased, and manufacturing problems can be solved. The problem here is where to divide the circuit configuration, and depending on the dividing point, after the printed circuit board is assembled into the device 1, the electrical components of the printed circuit board may be separated. When connecting, the number of soldering points increases more than necessary, or it is necessary to judge whether the polarity is positive or negative during soldering, which greatly affects work efficiency.

In view of these points, the present invention aims to reduce the number of connection points such as soldering and to improve workability by eliminating the need for determining polarity, etc., and its characteristics are as follows: The discharge lamp is equipped with an inverter side circuit and a transformer circuit having a leakage transformer connected to the oscillation transformer of the inverter side circuit, and the electric components constituting these circuits are mounted on a board and incorporated into the appliance. The lighting device is provided with two boards, and the inverter side circuit and the transformer circuit are separated between the oscillation transformer and the leakage transformer and assembled to each board, respectively.

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiment. In Fig. 3, reference numeral 4 denotes an elongated two-lamp lighting fixture, which is formed with a hole 5 for leading in a power supply line and a bolt hole 6 for mounting. In addition, two printed circuit boards 7 and 8 incorporating electrical components constituting an inverter-type lighting circuit shown in FIG. 4 are built into the appliance 4. Note that the printed circuit boards 7 and 8 may be housed in a metal case or the like with electrical components attached thereto, and the internal space may be filled with a compound and solidified, but it is also possible to simply house them in the case or the like. Of course, that case may be omitted.

In Fig. 4, L ₁ and L ₂ are discharge lamps, and 9 is a transformer circuit, which includes leakage transformers T 4 and T 5 corresponding to each discharge lamp L ₁ and L ₂ , and a balance transformer connected to the primary side of the leakage transformers T ₄ and T ₅ . Consists of T ₃ . 10 is a transformer circuit 9
_{An inverter} for _lighting discharge lamps L _{1 and} L _{2 at} high _{frequency through}
It consists of C ₁₀ , C ₁₁ , resistors R ₇ , R ₈ , R ₉ , R ₁₀ , R ₁₁ , R ₁₃ , diodes D ₈ , D ₉ , D ₁₀ , D _11, etc., and transistors Q ₁ and Q ₂ are connected alternately. It is configured to turn on and off and generate a high frequency voltage via the oscillation transformer _T2 . 11 is an AC power supply circuit, and DB ₁ and DB ₂ are diode bridge circuits for full-wave rectification of the AC power supply. _Q5 is a triax, and _R1 is a current limiting resistor. 12 is a trigger circuit that triggers the gate terminal of triax Q ₆ , which includes transistors Q ₄ ,
It consists of a thyristor Q ₅ , resistors R ₂ , R ₄ , R ₅ , R ₆ , capacitors C ₅ , C ₆ , diode D ₇ , etc. After the power is turned on, there is a delay for a certain period of time determined by resistor R ₆ and capacitor C ₅ . thyristor Q ₅ and transistor Q ₄ are turned on, making triac Q ₆ conductive. Therefore, for a certain period of time after the power is turned on, a current limited by the resistor R ₁ flows through the inverter 10, preheating each filament of the discharge lamps L ₁ and L ₂ with a low current. After a certain period of time has elapsed, the trigger circuit ₁₂ turns on the triac Q6, the inverter 10 performs a predetermined operation, and the discharge lamps _L1 and _L2 light up. 13 is a smoothing circuit that smoothes the output voltage of the diode bridge circuit DB ₁ and applies it to the inverter 10, and includes diodes D ₁ , D ₂ , D ₃ , D ₄ , D ₅ , D ₆ , D ₁₂ ,
Constant voltage diode D ₁₃ , capacitor C ₂ , C ₃ , C ₄ ,
It consists of C ₁₂ , C ₁₄ , a choke L, resistors R ₃ , R ₁₂ , R _14, etc., which transfers the electric charge charged in the capacitors C ₂ , C ₃ , C ₄ when the triax Q ₆ is conductive to the diode when it is not conductive. It is discharged to the inverter 10 via D ₁ , D ₂ , D ₃ , D ₄ , D ₅ , D ₆ and the choke L.

The above inverter type lighting circuit includes an oscillation transformer T ₂ of an inverter 10 and a transformer circuit 9.
The leaky transformers T ₄ , T ₅ , and the balance transformer T ₃ are divided into two as shown by the line segment P, and the electrical components constituting each circuit on the inverter 10 side are mounted on the printed circuit board 7 and the transformer circuit 9. leaky transformer
T ₄ , T ₅ and the balance transformer T ₃ are mounted on the printed circuit board 8, respectively, and therefore, two connecting wires 14, 15 are connected between the circuits of the two printed circuit boards 7, 8.
It is easy to solder, just connect with.
Furthermore, since alternating current flows through the connection lines 14 and 15, they are non-polar and can prevent the occurrence of erroneous connections. Furthermore, since the voltage is high, it has the advantage of being resistant to noise and being less affected by noise. In addition, the transformers, which are heat generating parts, are both printed circuit boards 7 and 8.
Since it is divided into two parts, it is possible to suppress temperature rise and improve reliability.

Incidentally, another separation method could be to divide by the line segment Q in Figure 4, but in this case, there would be three connecting wires, the three connecting wires would have polarity, and the voltage would be relatively low. However, it has drawbacks such as being weak against external noise.

In the example, a two-lamp lighting type was illustrated, but the circuit configuration is not limited to this, and for example, a one-lamp lighting type is illustrated.
The same method can be applied to a light-lit type or the like.

In this invention, two circuit boards are provided, and the inverter side circuit and transformer circuit are separated between the oscillation transformer and the leakage transformer and assembled on each board, so there are two interconnecting wires. Moreover, there is no need to judge the polarity, which significantly improves work efficiency. Moreover, since the connecting parts are at high voltage, it is resistant to external noise, and since the heat generating parts are separated, temperature rise is reduced and reliability is improved.

[Brief explanation of drawings]

Figure 1 is a perspective view of the instrument, Figure 2 is its plan view,
FIG. 3 is a plan view of a device showing an embodiment of the present invention;
FIG. 4 is a circuit diagram of the lighting circuit. 4... Instrument, 7, 8... Printed circuit board, 9...
Transformer circuit, 10... Inverter, 12...
Trigger circuit, 13... Smoothing circuit, 14, 15...
Connection wire, T ₂ ... oscillation transformer, T ₃ ... balance transformer, T ₄ , T ₅ ... leakage transformer, Q ₆ ... triax.

Claims (1)

[Scope of utility model registration request] In a discharge lamp lighting device comprising an inverter-side circuit and a transformer circuit having a leakage transformer connected to an oscillation transformer of the inverter-side circuit, the electrical components constituting these circuits are mounted on a board and incorporated into a fixture. A discharge lamp lighting device comprising two circuit boards, wherein an inverter side circuit and a transformer circuit are separated between an oscillation transformer and a leakage transformer and assembled to each board.