KR870001659B1 - A fluorescent lamp - Google Patents

Abstract

This invention relates to the manufacturing method of filament for the fluores ent lamp which improves the life and quality of lamps. In this method, the shape of filament is a straight line piece, and the filament is made of double type coil which is made by coieing the core wire over the origninal wire. Diameter of origninal and core wire are 0.05±0.2mm and 0.025±0.01mm, and dia and length of coil are 0.6-1mm and 20±6mm, relatively.

Description

Method for manufacturing filament of fluorescent lamp

1 is a conventional filament configuration.

2 is a bad state diagram in the conventional filament mooring operation.

3 is a mooring process diagram of the filament.

4 is a configuration diagram of a filament according to the present invention.

Figure 5 is an Emmy first application test table.

* Explanation of symbols for main parts of the drawings

a: Nickel lead wire b: Nickel lead wire

c: filament d: hopper

The present invention improves the lifespan of fluorescent lamps by modifying the shape and structure of the filament to increase the coating amount of the electrospinning material and at the same time, thereby improving the lifespan of the fluorescent lamps, and making it possible to manufacture uniform high quality fluorescent lamps. It relates to a manufacturing method.

In general, the structure of the fluorescent lamp is composed of a glass tube, a fluorescent material applied to the inner surface of the glass tube, and a filament between the positive electrode and an electron-emitting material applied to the filament (hereinafter referred to as an "emi-line"), and some mercury and argon inside the tube. It is filled with gas.

Looking at the light emission principle of such a fluorescent lamp, unlike incandescent bulbs using heat radiation, when the filament is heated by passing a current through both ends of the filament with a radiative luminescence made of electrons, electrons are emitted from the heated emitter, thereby discharging Is done.

Therefore, in the fluorescent lamp, the lifetime depends on the extinction time of the emitter applied to the filament, so it is necessary to increase the emitter applied to the filament.

However, the greater the amount of Emi-line applied, the longer the time required for the active filament to be activated in the exhaust process, and there were many difficult problems in the production process even to increase the amount of coating more than 5mg.

The filament used in the conventional fluorescent lamp has the shape as shown in FIG. 1, and according to the fluorescent lamp, the double coil type for the general starter fluorescent lamp and the triple coil type filament for the rapid starter fluorescent lamp Ring-shaped tabular), and for 20W or 40W fluorescent lamps, the filament has an resistance of 3-6? To maintain an emission temperature of 1000 | 13000 ° C.

Such filaments having such a structure and shape are often biased to one side as shown in Fig. 2 during the mooring work of the nickel portion of the stem and the filament, and thus, the application amount is not uniformly applied during the process of applying the emitter line to the filament. As a result, the lifespan of lamps made of filaments with less emiline was generated, resulting in very short initial blackening even at the characteristics of 100 hours, resulting in very low reliability of the product.

First, the filament mooring process will be described. After inserting the stem 1 as shown in FIG. 3, the front part (b) is bent so that the filament can be guided and caught by the nickle introduction line (a) of the stem, and then the filament (c). Put on the folding part of nickle wire and crimp the nickle wire with filament.

The filament having completed the mooring is applied to the emiline by the hopper (d).

As such, the filament mooring line and the emiline application process are automatically performed by the mount machine, and thus the amount of emiline application is applied differently according to the position of the filament mooring, and thus the uniformity of the product cannot be obtained.

Here, 50 filament samples were taken and the results of the life characteristics of the fluorescent lamps according to the amount of application and the amount of Emi-rays manufactured in the mount are shown in the table below. Will be

As can be seen from the above results, the amount of Emi-rays applied to the filament is not constant, but largely 5 mg or more is applied, but only 1-2 mg is applied.

As a result of the present inventors' careful analysis of the cause, it was found that the coating amount changes depending on the position where the filament is lined with the nickel wire.

In other words, it was found that the amount of application of Mie wire decreased as the line was moved away from the center of the nickle line between the central portion of the filament.

In the present invention, in order to compensate for the above-described drawbacks of the conventional filament, the filament is formed in a "one" shape as shown in FIG. 4 to increase the amount of application of the emitter and to be constantly irrespective of the position of the filament. It is to manufacture a fluorescent lamp long life by coating.

Hereinafter, the present invention will be described in detail with reference to experimental examples. First of all, in order to increase the amount of application of the filament to the filament, the content of the filament needs to be increased, so that the coil diameter of the filament is designed to be larger than the current filament, according to the respective dimensions. As a result of the emission coating test, as shown in FIG. 5, the coating amount increased as the coil diameter was increased, but decreased again at 0.9 mm or more.

At this time, since the viscosity of the currently used emitter is 25 to 1.4P _as , the larger the viscosity, the larger the coil diameter (figure 4) can be larger than 1mm, but the electric field of constant tungsten (to maintain the resistance of 3-6Ω) As the length of the filament is shortened, there was a problem that manufacturing is difficult.

Thus, the inventors found that the coil diameter was 1 mm or less while maintaining the viscosity and specific gravity of the current emitter line, and the blackening occurrence and lifespan at the end of the initial tube compared with the lamp using the conventional filament were improved as follows.

* Table: Lifespan and Blackening Rate of 40W Fluorescent Lamp

Example 1

The coil diameter of the filament is 0.2mm wire diameter 0.05 ± 0.02mm core wire 0.025 ± 0.001mm The filament is made of “one” filament with the length of 20 ± 6mm, and it is laid on the Nickel lead wire of 40W system and the viscosity at 25 ℃ 1.4P _a . _{When the s} emitter was applied, the dose of the emitter was 1.5mg, the lamp life was 2,000Hr at the rated voltage, and the blackening rate was 5.8.

Example 2

Coil diameter of filament is 0.4mm Wire diameter 0.05 ± 0.02mm Core diameter 0.025 ± 0.001mm A filament having a length of 20 ± 6mm is manufactured. Viscosity 1.4 P _a . _{When the s} emitter was applied, the amount of emitter was 3.5mg, the lamp life was 6,000Hr, and the blackening occurred at 5.8%.

Example 3

Coil diameter of filament is 0.6mm Circular diameter 0.05 ± 0.02mm Core diameter 0.025 ± 0.001mm A filament with a length of 20 ± 6mm is manufactured. 1.4P _a . _{When the s} emitter was applied, the amount of emitter was 5mg, and the lamp life was 9,000Hr at the rated voltage and the blackening rate was 5.8%.

Example 4

The coil diameter of the filament is 0.8mm wire diameter 0.05 ± 0.02mm core wire 0.025 ± 0.001mm The filament is made of “one” filament with the length of 20 ± 6mm, and it is attached to the Nickel lead wire of 40W system and the viscosity at 25 ℃ 1.4P _a . _{When s} emitter was applied, the amount of emitter applied was 5.8mg, lamp life was 11,000Hr at rated voltage, and blackening rate was 4.7%.

Example 5

Coil diameter of filament is 1mm wire diameter 0.05 ± 0.02mm core wire diameter 0.025 ± 0.001mm Filament is made of “one” filament with length 20 ± 6mm, and it is attached to Nickel lead wire of 40W system and viscosity at 25 ℃ 1.4P _a . _{When the s} emitter was applied, the dose of the emitter was 6 mg, the lamp life was 12,000Hr at the rated voltage, and the blackening rate was 4.8%.

Example 6

Coil diameter of filament is 1.2mm Circular diameter 0.05 ± 0.02mm Core diameter 0.025 ± 0.001mm A filament with a length of 20 ± 6mm is manufactured. Viscosity 1.4 P _a . _{When the s} emitter was applied, the amount of emitter applied was 4.5 mg, the lamp life was 7,500Hr at the rated voltage, and the blackening occurred at 5.5%.

The present invention changes the shape of the tabular "one" filament with the coil diameter of the filament from 0.2mm to 1.2mm as described above, thereby increasing the amount of application of the emitter and extending the life of the lamp and making the quality uniform. It is to provide an invention with a very useful effect having a feature such as can be carried out without changing the mount manufacturing equipment in particular.

Claims (1)

In filament of fluorescent lamp,

or

The filament shape of the filament is formed as "(-)", and the filament wire is 0.05 ± 0.2mm and the core wire is 0.025 ± 0.01mm by using a tabular (coiled core wire) A method of manufacturing a filament of a fluorescent lamp, characterized in that the diameter is from 0.6mm to 1mm and the length is 20 ± 6mm.

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