JPS5885266A - Glow starter - Google Patents

Abstract

PURPOSE:To prevent any generation of re-operation of a glow starter when it is used for lighting of a fluorescent lamp by fixing a specified amount of a metal barium to the inner wall of an airtight case, an electrode structure or the like. CONSTITUTION:An electrode structure 6, which is installed in the airtight case 1 of a glass bulb, is constituted by providing a stem 5 with both an electrode 2 fixed to one inner lead-in wire and a movable bimetal electrode 4 one end of which is fixed to another inner lead-in wire 3. At least 1mg of a metal barium such as BaNb is fixed to each of the fixed and the movable electrodes 2 and 4 of the electrode structure. In addition, the case 1 is charged with argon gas used as a discharge-facilitating gas. As a result, the re-operation voltage can be heightened, and the generation of re-operation can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION Technique of the Invention Minute Hand The present invention relates to a lighting tube, and relates to an improvement in the structure of the lighting tube that prevents restarting when lighting a low-pressure mercury vapor discharge lamp such as a fluorescent double ring. Regarding ^.

Technical background of the invention For preheating type starting of low-pressure mercury vapor discharge lamps such as fluorescent lamps, one lighting tube is required! ! It's hanging. This lighting tube is connected to a power source in parallel with the fluorescent lamp, and the lighting tube discharges before the fluorescent lamp starts discharging, and the heat of the discharge operates the bimetal of the thermally responsive element, causing a short circuit. A preheating current flows from the power supply to the electrodes of the fluorescent lamp, and electrons are emitted from the electrodes of the fluorescent lamp.The thermally responsive element of the lighting tube is cooled by the short circuit described above and the short circuit is released, and at this time the thermal response element is connected in series to the fluorescent lamp. The kick voltage generated by the inductance of the ballast starts the main discharge of the fluorescent lamp and turns it on. When the main discharge of the fluorescent lamp starts, 2
If the restart voltage (re-discharge starting voltage) of the lighting tube is lower than the discharge starting voltage of the fluorescent lamp, the lighting tube will be restarted and the fluorescent lamp will not light up.

Problems with the Background Art The lighting tubes for lighting low-pressure mercury vapor discharge lamps, such as fluorescent lamps used at a power supply voltage of 120V or more, cannot be reused when the lamp voltage of the fluorescent lamp is 65V or higher. The operation, that is, the re-operation voltage of the two lighting tubes is lower than the discharge start voltage of the fluorescent lamp, so the phenomenon that the fluorescent lamp does not light up is likely to occur. Conventional lighting tubes have metal barium, which is used in 100V AC lighting tubes, coated on the electrodes to the extent of 0.5 Da as an electron emitting material, and argon is sealed as an easily discharged electric material. It was used to light up fluorescent lamps, but there was a problem in that 4IK was likely to restart.

Purpose of invention The present invention relates to a low-pressure mercury vapor discharge lamp such as a fluorescent lamp.

It is an object of the present invention to provide a modified lighting tube that can be used to light a fluorescent lamp lit with a power supply voltage of AC 120V, for example, to prevent the occurrence of restart.

Summary of the invention A lighting tube in which at least one metal barium is coated on the inner wall of the airtight container and/or the electrode structure of the lighting tube, and the re-operation voltage is increased by filling argon as an easily discharged electric material. It is a structure.

Embodiment of the Invention The structure and operation of the present invention will be explained in detail with reference to an illustrated embodiment.

The figure is a partially cutaway front view of a lighting tube for an AC 120V fluorescent lamp according to an embodiment of the present invention.
! (1) a fixed electrode (2) of one internal lead-in wire;
Introducing the other internally The tube is sealed to the end of the airtight container (1) at the end of its stem (5). Airtightly and electrically conductively hermetically sealed (1i) (1) External lead wire t'y), ('
An exhaust pipe is connected to the end of the airtight container (1) from which the external lead wire t7L (7) is not led out through the exhaust pipe, and the airtight container (1) is led out through the exhaust pipe. (
1) The inside is heated and exhausted.

The fixed electrode (2) of the electrode structure (2) and the movable type @(
4) is coated with 5 to 10 Da of barium nitride BaNb, which is thermally decomposed in a vacuum during heating and evacuation in the airtight container (1) to become metallic barium (9), (9).

When the entire amount of barium nitride decomposes into metallic barium, it becomes 3.1 to 6.211' of metallic barium, but some of it may be decomposed during the thermal decomposition in vacuum, so it is usually is metallic barium with an amount of about 1 to elv.

Next, the progress of the experiment conducted by the present inventor will be described.

The present inventor manufactured a lighting tube filled with argon as an easy-discharge electric body by varying the amount of barium nitride deposited on the fixed electrode and the movable electrode of the electrode structure.

We tested how the re-operation voltage changes depending on the amount of metallic barium deposited on the electrodes of the lighting tube. The amount of metallic barium deposited on the electrodes of the above-mentioned lighting tube can be measured using the weight of the test lighting tube and after the test is completed, the airtight container of the test lighting tube is destroyed and %@ of barium is washed away. The difference between the weight of the lighting tube and the weight of the lighting tube after peeling off was taken as the weight of the metal barium. The results are shown in the table below. 0 The following margins used the various lighting tubes listed above. Source voltage was 120V AC.
As a result of starting tests on fluorescent lamps used in Although we were able to successfully start the fluorescent lamp, lighting tubes containing less than 1■ of metallic barium, that is, those with a re-operation voltage lower than 751, are more likely to cause the restart phenomenon of the lighting tube. It has been difficult to get fluorescent lamps to start properly.

According to the inventors' considerations, if the metal barium of the lighting tube is at least 1.9 mm, the barium nitride will not be overheated when the lighting tube is evacuated during automatic exhaust (lamp voltage 65 V). In the example 0 above, which seems to have been able to maintain the reoperation voltage of the lighting tube without causing a reoperation phenomenon between the fluorescent lamp and the fluorescent lamp, metallic barium was used for the fixed electrode and the movable electrode. As explained above, metallic barium may be deposited on the inner wall of the airtight container.Also, even if the amount of metallic barium in the airtight container of two lighting tubes is slightly less than 1 Da, the discharge of the fluorescent lamp will be reduced. There are some lamps in which restarting does not occur depending on the starting voltage.2 Considering the risk factor, the present invention claims a lighting tube characterized in that it is housed in an airtight container. be.

Effects of the Invention As detailed above, the two F11 lights are filled only with argon as an easy-discharge electric body for lighting low-pressure mercury vapor discharge lamps such as fluorescent lamps, such as fluorescent lamps used with a power supply voltage of 120 V AC. This has the effect of providing an improved lighting tube that can prevent the occurrence of re-operation with the fluorescent lamp in the lighting tube.

[Brief explanation of the drawing]

The figure is a partially cutaway front view of a lighting tube for a 120 V AC firefly lamp according to an embodiment of the present invention. 1...Airtight container 2...Fixed electrode 4...Movable electrode 6...Electrode structure 9...Metal barium 1 person Patent attorney Noriyuki Chika (and 1 other person)

Claims (1)

[Scope of Claims] An electrode assembly comprising an airtight container, a fixed electrode and a movable electrode disposed opposite to each other in the airtight container, and a chilbone filled as an easily discharging electric substance in the airtight container, A lighting tube characterized in that at least 1 mg of ametallic barium is deposited on the inner wall of the airtight container and the electrode structure or the electrode structure.