JPS58117632A - Electric-discharge-lamp starting device - Google Patents

Abstract

PURPOSE:To shorten wasteful time taken from application of power until starting of preheating, and shorten the starting time of an electric-discharge lamp by installing a quick-acting movable electrode, which is made of a bimetal, has a small heat capacity and has a high sensitivity, in such a manner that it faces to a fixed electrode, and connecting the quick-acting movable electrode to the terminal of a main movable electrode. CONSTITUTION:A quick-acting movable electrode 6 is heated by designing the distance between the electrode 6 and a fixed electrode 1 and the like so that glow electric discharge develops between the electrodes 6 and 1. Since the electrode 6 has a small heat capacity and is a quick-acting electrode having a high sensitivity, it curves satisfactorily rapidly compared to the usual glow electric-discharge tube until the space formed between the electrodes 1 and 6 is closed. As a result, a current flows through a circuit consisting of a terminal 4, a heater 7, the electrode 6 and the electrode 1, and heats the heater 7. Then, a main movable electrode 2 made of a bimetal is heated and immediately curved, the space formed between the common electrode 1 and the electrode 2 is closed, and a preheating current flows between a terminal 3 and the terminal 4. Consequently, the starting time of an electric-discharge lamp can be shortened by decreasing wasteful time taken until the preheating current begins to flow.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a starting device for a discharge lamp such as a Giroichi lighting tube.

FIG. 1 shows a conventional Giroichi lighting tube G. In the figure, ill is a fixed electrode, (2) is a movable electrode, (S) is a fixed electrode terminal,
14) respectively indicate the terminals on the electrode side. As shown in Figure 2, connect the filament electrode terminal on the non-power side of a discharge lamp such as a fluorescent lamp to the terminal fil, +4), and connect the
By charging the fixed electrode (1) in the glass tube (6)
) and the movable electrode (2) /)o-discharge occurs,
The movable electrode (21) made of bimetal is heated and deformed, and the distance between the two electrodes (fi+, (21) becomes shorter.Then, after a certain period of time, both electrodes (1) and (2) close the circuit,
Preheat the filament fBjl of the discharge lamp. (1),
(When the circuit between both electrodes of RI is closed, I) 〇-Discharge stops and the movable electrode (RI begins to cool and return to its original position after a short time [1)
, (!L opens between the two electrodes, a medium voltage is generated in the ballast B, and is applied to the discharge lamp, starting the discharge lamp L#i. If the discharge lamp cannot be started and lit due to disconnection, the above operation can be repeated to start and light the discharge lamp.

However, from this point/) In B1 lighting tube G, both electrodes ill
(Since the preheating current of the discharge lamp does not flow until the circuit 21 closes, the preheating is delayed accordingly, resulting in a disadvantage that the starting time is long.

The present invention was made in consideration of these drawbacks, and its purpose is to shorten the time from power-on until the movable electrode made of metal is closed and the start of preheating. An object of the present invention is to provide a discharge lamp starting device which is slowed down by shortening the starting time.

The present invention will now be described by way of examples. FIG. 8 shows the configuration of one embodiment. In the figure, t1) is a fixed electrode installed in the center and sealed in a glass tube + IlO bottle sealed case in a substantially vacuum state and filled with an inert gas; ) is the main movable electrode of bimetal+lil, and this main movable electrode (2) is compatible with the movable electrode of the conventional example shown in FIG.

(3) is the fixed electrode side terminal, I4) is the movable electrode side terminal,
Each terminal i! 11, +4it'; as the main movable electrode (
2), connected to the fixed electrode (1); In addition, (6) in the figure is a nine interlocking movable electrode that is provided on the opposite side of the fixed electrode (tl) to the main movable electrode (2), and 'C1 this interlocking movable electrode (
.) is made of a bimetal with a small heat capacity, high sensitivity, and high operating speed, and is provided close to the upper J moving electrode t21 and connected to the movable electrode side terminal -41 via -51F71.

Next, the operation of the discharge lamp starting device of the present invention will be explained.

First, as in the conventional example shown in Fig. 1, both terminals (S) are connected between the non-power supply filament terminals of the discharge lamp in Fig. 2.

14) Connect t-each. Next, when you turn on the AC power,
Power supply Act pressure is applied between both terminals 431 and 141 via both filament electrode terminals of the ballast B1 discharge lamp.

and at least an interlocking movable electrode (6) and a fixed electrode (1))
The interlocking movable electrode (-) is heated by designing the distance between the two electrodes (ull, tl), etc. so that tel causes a giro discharge. The speed m0r moving electrode tel has a small heat capacity and is a fast moving electrode with high sensitivity, so it can be detected much faster than in the case of a normal glue discharge tube.
Then, look at the fixed +g and the fast-moving movable electrode.6) Darkness is closed.

For this purpose, the terminal 14) register (7), the interlocking movable electrode (
A circuit is formed between @1 and the fixed electrode ill, and a current flows. The value of the resistor (7) is determined so that this current is smaller than the normal preheating *a and sufficiently larger than the normal Jiro discharge current. Is it due to the warm current flowing in this area? ) generates heat, and the main movable electrode (2) is heated.

Since the heating power of this i-circuit is sufficiently larger than the normal Jiraud discharge current, it becomes a sufficiently larger heating power compared to the heating power due to l)〇-discharge, and therefore, the bimetallic main movable electrode ( The wire is bent once, and a common fixed electrode (1
) and the darkness closes (S).

Preheating current begins to flow between both terminals of the field. By configuring as described above, the interlocking movable electrode . Since the main movable electrode (2) also operates at high speeds, the wasted time until the preheating current begins to flow is reduced, and the starting time can be shortened. Note that after the main movable electrode (2) and the fixed electrode mountain face are closed, no current flows to the heater (7), and the main movable electrode til+ cools and returns to its original position.
ll, the two electrodes of [1] are separated. The seventh field & J movable electrode-61 returns before the main movable electrode (2),
The distance between the two electrodes is ill and tg+. If the engine fails to start, the initial operation is repeated.

By the way, the movable electrode (2) of the 5o lighting tube G as shown in FIG. 1 bends in a slow movement operation as the heating temperature rises and cools. Therefore, as soon as the movable electrode (2) comes into contact with the fixed electrode tl) and the Ijo-discharge disappears, the movable electrode (2) begins to cool down, and the movable electrode (2) returns to its original state within a very short time. In this way, it becomes curved and opened. Therefore, the preheating period for heating the filament fIeft of the discharge lamp is short, and the temperature of the filament cannot reach a temperature sufficient to emit thermionic electrons with one opening/closing, so there is a high probability of startup failure. In some cases, the discharge lamp repeatedly blinks and becomes unsightly, and it takes a long time to start.

Therefore, as shown in FIGS. 4 and 5, if a substantially spherical convex portion (8) is provided on a part of the movable electrode (2) to provide a jumping spring structure, the drawback described in E can be solved. That is, when the movable electrode (2) bends due to discharge and comes into contact with the fixed electrode 11 to form a closed circuit, and during the closed circuit state, the movable electrode (2) cools down.
When the movable electrode (2) shifts to the open state again, the movable electrode (2) exhibits a steresis characteristic due to the jumping action of the protrusion (8) between the temperature rise and its displacement, and exhibits a snap action.

Therefore, compared to the normal glue 〇1 lighting tube G, the movable electric lamp ffi
+21 and the fixed electrode ill's closing time is stabilized and lengthened, so a preheating current flows, and one closing period is sufficient to increase the temperature of the discharge lamp filament fs, 4. Therefore, the discharge lamp The start-up is smooth, the number of blinking times of the lighting tube G at the time of start-up can be reduced, the unsightliness is eliminated, and as a result, the start-up time can be shortened. In the figure, the symbol - indicates the connection point with the movable electrode (the terminal 14).

For this application, the E of the movable electrode (2) is
The movable electrode may have a simple arch spring configuration by engaging the end with a holding part (91) provided on the ceiling of a sealed case such as a glass tube +il. In this case, the movable electrode (2) made of bimetal and its It is possible to exhibit a snap characteristic by providing a hysteresis characteristic between the displacements of the center part.A break 4I in the figure indicates a closed state of the movable electrode (2).

In addition, as shown in Fig. 7, the movable electrode (Rito arch spring 110 +
6) and the movable electrode side terminal +4).
point city) and frame 0! The other end of the arch spring spring is inserted into the barrel of the nine concave portions A to form a two-figure jump spring configuration, and the main terminal I4) is in contact with the fixed electrode +1+ at position 0 shown by the broken line. It has steresis characteristics and can exhibit snap characteristics in the darkness between the bottom and solid line positions. FIG. 8 shows the relationship between the temperature rise and displacement of the bimetal used for the movable electrode (2), which exhibits a characteristic of jumping in the directions indicated by the broken arrows in the figure.

As mentioned above, by adding the jumping spring horizontal structure as the movable electrode body), the closing time of the movable electrode body〉 and the fixed electrode +1), that is, the necessary time for the horizontal structure through which the preheating current flows to be stabilized can be obtained. As a result, the temperature time of the filaments tr and tm of the discharge lamp is sufficient for one closing period, and for this reason, the discharge lamp can be started smoothly and the number of blinks of the Giroichi lighting tube at the time of starting can be reduced. The unsightliness is eliminated and, as a result, the startup time can be shortened.

The present invention is constructed as described above, and is connected to the terminal of the main movable tffi via the fixed electrode and the pair of upper orifice movable electrodes. Since the terminals of the solder electrode are connected to the non-power side of both filament terminals of the discharge lamp, the wasted time from turning on the power to starting preheating can be shortened, and the starting time of the discharge lamp can be reduced. It has the effect of being shorter.

[Brief explanation of the drawing]

@Diagram i is a schematic configuration diagram of a conventional example, FIG. 2 is a circuit diagram of a starting lighting circuit using beam 01 lighting tube, wJ8 diagram is a schematic configuration diagram of an embodiment of the present invention, and Figures 11 and 4 are application examples. Cross-sectional view of gS
The figure is a perspective view of the same movable electrode as above, Figures 6 and 7 are cross-sectional views of other application examples, and the sS diagram is a characteristic diagram of the bimetallic movable electrode of the application example. The crests are fixed electrodes, (! ) is the main movable electrode, +31 and +41 are terminals, +6) is the crow tube, (7
), L is a discharge lamp, f+, fgO is a filament. Agent Patent Attorney Ishi 1) Cho 7147 414 5 Figure 5 Figure 6 Hengan

Claims (1)

[Claims] (1) A fixed electrode and a bimetallic electrodynamic device are sealed in a sealed case, the inside of the sealed case is made into a near vacuum, and an inert gas is filled.
Opposite the fixed electrode, another bimetallic movable electrode with a heat capacity of 2:1 and a high sensitivity and fast operation is provided, and a nil r
Connect the main movable electrode to the terminal of the 41JM pole through a terminal provided close to the upper and 1ITIIJJ electrodes, and connect the end of this main movable electrode and the terminal of the fixed electrode to both main electrodes of the discharge lamp. - A discharge lamp starting device which is connected to the non-power side of one pole terminal.