JPS6017893A - Immediate automatic firing circuit with safety circuit unit of fluorescent lamp - 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] Conventionally, a glow starter method has been commonly used to light fluorescent lamps, but a glow starter uses discharge heat to operate a bimetal to reduce the kick voltage of the ballast that occurs during a switch circuit. Since the fluorescent lamp is started and lit by superimposing it on the power supply voltage, it takes a long time to start, and it is also a disposable item that requires maintenance. SUMMARY OF THE INVENTION It is an object of the present invention to provide a lighting device circuit which eliminates such disadvantages, provides a circuit that takes into consideration the safety of the entire lighting circuit, and can be manufactured easily and at low cost.

In the present invention, a unidirectional semiconductor diode (3) is connected from a ballast (1) through a filament (A) at one end of a fluorescent lamp (C) to a high-speed switching (2) of an element having the characteristic of a side-effect lamp (SSS). At the same time, a force contact (6) is provided at the tip of the elastic phosphor bronze plate (4),
The contact (6) is connected to the fixed contact (7) by an elastic phosphor bronze plate (4) that has been opened in advance, and one end of the nichrome wire (5) is connected to the tip of the power contact (6). Connect the wires, pull them together, and fix one end of the nichrome wire (5) at the bottom with the contacts (6) and (7) closed. Also, for the nichrome wire (5) used, Use a nichrome wire (5) with a capacitive resistor thickness that expands when heated, and connect the contact (6).
) (7) is connected to a circuit provided to actuate it, and the contact (
8), one end filament (
The lighting circuit is connected through the filament (A) and (B), and as usual, a noise prevention capacitor is required between (A) and (B) of the filament to prevent noise generation during lighting and to improve the discharge start when a hard pulse occurs. 10) and resistance (
12) and ceramic or film capacitors (11)
This invention relates to an immediate automatic lighting circuit with a safety circuit device for a fluorescent lamp, which is provided with a safety circuit device.

Next, we will discuss the lighting circuit shown in Figure 1 of the present invention. First, the circuit uses a side-duck and switching (2), and for this side-duck, one with a capacity that is compatible with the secondary voltage and current of the ballast is also used. Saidatsuku, Switching (
In the function of 2), the current flows when the entire current and voltage are flowing through the glow circuit, but when the fluorescent lamp (C) lights up and the circuit voltage drops, the current is cut off.
This switching, which is also used in conventional fluorescent lamp electronic lighting circuits, is used in the circuit (2) of the present invention, connected in series with a unidirectional semiconductor diode (3), and connected to a filament (
If you connect between A) and (B) and turn on the power, due to the nature of the unidirectional semiconductor diode (3), current will always pass only in one cycle, giving a preheating effect to the filaments (A) and (B). Force contact (6) through nichrome wire (5)
) Since the fixed contact (7) is provided in a forcibly closed state, current initially flows in both directions. However, when a current passes through the nichrome wire (5), the nichrome wire generates heat, and the nichrome wire stretches due to the heat, forming an elastic phosphor bronze plate (4).
Due to the repulsive force of the spring, the dynamic contact (6) becomes the fixed contact (7)
Its contact (6) (
The fluorescent lamp (C) is lit by the pulse voltage generated when the switch 7) is opened.
) continues to light up normally, thus heating the filaments (A) and (B) through the ballast (1) in the positive half cycle,
The fluorescent lamp (C) is turned on by the kick pulse generated by the ballast (1) during the negative half cycle.If the lamp is turned on, the lamp voltage will be less than 80 volts, so switching (
2) does not work, current stops flowing, and the fluorescent lamp (C) lights up with normal discharge. The above is an explanation of the lighting circuit.Next, if the fluorescent lamp (C) is reduced and cannot be lit, the contacts (6) and (7) will continue to operate, so the contacts will close in a short time. Since there is a risk of deterioration or welding, the pulse voltage spark that is generated largely due to the interference prevention capacitor (10) can be prevented by using the resistor (12) to prevent contact points (6) and (7) with a resistance that does not impair pulse generation. ), or interpose a ceramic or film capacitor, etc. from both ends of the lead connection of the unidirectional semiconductor diode (3) to (11) to reduce the pulse generation voltage generated by the spark only at the contacts (6) and (7). capacitor (11
) can also be used to reduce the spark at contacts (6) and (7).In this way, regardless of whether the capacitor (11) or resistor (12) is involved, the spark at contacts (6) (
7), the spark generated in the capacitor (11 ) will further improve the lighting start of the fluorescent lamp (C).In addition, in this circuit, either the capacitor (11) or the resistor (12) can be used, but at the same time Even if it is interposed, there is no problem on the lighting circuit. In order to create a circuit in which the contact spark is reduced by such means and further safety is maintained, a contact (8) is provided at the tip of which one end of the bimetal (9) is fixed, and the contact contacts the fixed contact (7). By leaving it in this state, the heat generated by the continuous sparks of the contacts (6) and (7) and the heat generated by the resistance of the nichrome wire (5) are added to the bimetal (9), and the bimetal gradually moves in the direction of the arrow in the drawing. The contact (
When 8) is separated and the circuit current is interrupted or closed, the generated heat is stopped, and the bimetal (9) naturally returns to its original state, and the contact (8) comes into contact with the fixed contact (7). Since this process is repeated continuously, it is possible to give time to stop the continuously applied sparks to the contacts (6) and (7), and to prevent the welding of the contacts (6) and (7) or the elongation of the nichrome wire by burning. Moreover, it also eliminates the risk of fire and wasted electricity due to burnout of the ballast. It is also possible to remove the contact (8) circuit and place the bimetal (9) directly in place of the fixed contact (7) as shown in Figure 2. In this case, the circuit can be easily made, but the bimetal (9) 9) is heated and the fixed contact (7) is bent in the direction of the arrow in the drawing, the nichrome wire (5) is prevented from being sintered, and the contacts (6) and (7) are welded to remove heat.
Although it can slow down the opening/closing operation of contacts and reduce sparks, it is not possible to give time to completely cut off the current because a periodic current constantly flows in one direction through the unidirectional semiconductor diode (3). It would be better to use a circuit with a contact (8) separate from the fixed contact as shown in Figure 1. In this way, not only can safety be maintained by the operation of only the bimetal device, but also safety can be maintained because a circuit including a resistor (12), a capacitor (11), etc. is provided.

Next, in Figure 3, the connection circuit position of the elastic phosphorescent copper plate (4) and the nichrome wire (5) is placed between the switching (2) and the diode (3), and the contact points (6) and (7) are connected. ) is installed at the tip of the elastic phosphor bronze plate (4) in the opposite way to that shown in Figure 1, and even if the circuit is made with the contacts open, the nichrome wire (5) will stretch when current flows through the elastic phosphor bronze plate. Due to the repulsive force of (4), the moving contact (6) comes into contact with the fixed contact (7), contrary to the diagram in Figure 1, and when the contacts (6) and (7) come into contact, the nichrome wire (5) Since the resistance current is absorbed, the nichrome wire (5) shrinks back and the contacts (6) and (7) open, and the sharp pulse generated when this opens applies to the fluorescent lamp (C) and lights it up by discharging. Also, after lighting, no current flows due to switching (2) and contacts (6) and (7) are kept open, so even if the lamp voltage rises a little even in low winter temperatures, the switch (2) works and the contacts (6) and (7) remain open. The intervention of the diode (3) also works, and the fluorescent lamp (C) can also be turned on. Other contact points (8) Bimetal (
9) Noise protection capacitor (10) Capacitor (11) Resistor (
The connection and function in 12) are the same as in Figure 1, but as shown in Figure 2, the contact (8) circuit is removed and the fixed contact (
If the circuit is made with a bimetal (9) placed on the side 7), the direction of bending of the bimetal should be opposite to that shown in Figure 2. Next, it is used in each of Figures 1 to 3 shown in Figure 4.
In the unidirectional semiconductor diode (3), the contact (6) (
7) You must use a diode with a withstand voltage capacity that can withstand the peak voltage that occurs when the diode opens, but if the peak voltage that occurs is higher than the capacity of the diode being used, use a capacitor. (1
It is more effective for the diode to interpose a ceramic or varistor instead of a capacitor at the intervening location in 1) to absorb the excess peak voltage. Next, in the case of switching (2), depending on the type of fluorescent lamp (C), the peak voltage at both ends of the lamp becomes too high, especially in winter when the temperature is low. 10), the current may be turned on even after lighting, and the flicker may repeat until the lamp maintains a constant temperature. In this case, the noise prevention capacitor (
10) In parallel with the intervening point of the glow discharge bulb, which is compatible with the secondary voltage of the ballast, remove the internal bimetal and use a small pilot bulb with only both discharge electrodes, or a neon bulb, etc., with a noise prevention capacitor and a discharge bulb. (13) is connected, and the lamp voltage that breaks over above the VBO of the side switch and switching (2) is caused to cause a slight discharge through the intervention of the discharge bulb (13), and the slight discharge lowers the lamp voltage. By preventing the side lamp (2) from turning on, it is possible to prevent the fluorescent lamp (C) from flickering at low temperatures.

Since this is a lighting circuit constructed according to the device circuit explanations in Figures 1, 2, 3, and 4, it can be used regardless of the type of ballast or lamp, and moreover, in low temperatures or in pitch darkness. Not only does it instantly and automatically turn on the fluorescent lamp (C), but it is also a lighting circuit that takes safety into consideration, such as reducing the number of lamps and preventing all dangers when the lamp cannot be lit.Unlike glow starters, the entire circuit is It has a long lifespan, and since the entire circuit device can be made smaller, it can be manufactured as a screw-in type for glow sockets other than the socket type inside the appliance, and it has the advantage of being used over a wide range of purposes, such as being easy and inexpensive to manufacture. .

[Brief explanation of the drawing]

The drawings are circuit diagrams showing embodiments of the present invention. The first figure is an overall circuit diagram of the present invention, and the second figure is a circuit in which the bimetal (9) is placed on the fixed contact (7) side. The third figure is a lighting circuit diagram with the contacts (6) and (7) installed in reverse and the contacts are open. It is a circuit diagram provided to further improve the function of the diode (3). (1) Stabilizer (2) Side lock, switching, (3
) unidirectional semiconductor diode, (4) elastic phosphor bronze plate,
(5) Nichrome wire, (6) Forced contact, (7) Fixed contact,
(8) Contact, (9) Bimetal, (10) Miscellaneous capacitor, (11) Contact spark absorption capacitor, varistor, (12) Contact spark stopper resistor, (13) Discharge bulb, (
C) Fluorescent lamp, (A) (B) Filament. Patent applicant Mitsuharu Nakamura

Claims (1)

[Claims] The ballast (1) is connected to the unidirectional semiconductor diode (3) through the filament (A) at one end of the fluorescent lamp (C) and the switching (2), and the elastic phosphor bronze plate (4). Force contact at the tip (6)
was set up, and the contact point (6) was pulled up and fixed so that it was in contact with the open state of the elastic phosphor bronze plate (4) using the nichrome wire (5) at the beginning of the fixed contact point (7). Bimetal (9) connected to the circuit and connected to the fixed contact (7) through the unidirectional semiconductor diode (3)
A contact point (8) is provided at the tip of the fluorescent lamp (C) to create a circuit through the filament (B) at one end, while a noise prevention capacitor (1) is connected between the filaments (A) and (B) as before.
0), a discharge lamp (13) is interposed therebetween, and a resistor (12) which serves as a contact spark stopper is also present in the noise prevention capacitor circuit. Also, a ceramic or film capacitor for absorbing contact sparks is interposed between both ends of the unidirectional semiconductor diode (3) (11) to provide an immediate automatic lighting circuit with a safety circuit device for a fluorescent lamp.