A fluorescent tube for slim pipe diameter

Abstract

The invention discloses a fluorescent pipe with a thin pipe diameter, comprising a main body luminous pipe and a filament component, wherein the filament component comprises a filament; the fluorescent pipe is characterized in that an end part of the main body luminous pipe is connected with an auxiliary luminous pipe, the diameter of which is larger than that of the main body luminous pipe; the filament component is fixedly connected with the end part of the auxiliary luminous pipe; the filament is arranged inside the auxiliary luminous pipe; the fluorescent pipe has the advantages that the auxiliary luminous pipe which is relatively larger in diameter is sealed, the total length of the filament is not affected by the thinning main body luminous pipe, the phenomenon of the filament contacting the wall can be effectively avoided without shortening the total length of the filament, the coating quantity of electric powders are guaranteed, the service life of the fluorescent lamp is effectively improved and the production yield of the fluorescent pipe can also be improved along with the reduction of the phenomenon of the filament contacting the wall.

Description

technical field [0001] The invention relates to a fluorescent lamp, in particular to a fluorescent lamp with a small diameter. Background technique [0002] Existing fluorescent tubes are provided with filament assemblies such as stems and the like at their two ends, but for fluorescent tubes with small diameters, especially energy-saving lamps with a diameter below φ6mm, due to the small diameter ( Excluding the thickness of the tube wall (the actual aperture is below 4.5mm), there is a phenomenon that the filament is easy to touch the lamp tube wall when making the seal. When the filament touches the wall of the lamp tube, there is a great potential safety hazard in the fluorescent lamp. When the life of the fluorescent lamp ends, the contact between the filament and the wall of the lamp tube is likely to melt or burn through. In addition, when the filament hits the wall of the lamp tube, the electronic powder of the filament will be sputtered onto the wall of the lamp tu...

AI Technical Summary

Problems solved by technology

However, this solution first requires the production of a suitable small core column, and the production of this small core column is quite difficult in terms of technology, because the actual diameter of the glass tube with a diameter below φ6mm after removing the thickness of the tube wall is φ4.5mm Below, this means that the horn pipe diameter of the core column is less than φ4mm, and the outer diameter of the exhaust stem of the manufactured core column must be less than φ1.8mm to match such a horn, and the actual diameter of the exhaust stem is only less than φ0.9mm, while It is very difficult to manufacture such a small-diameter exhaust stem, which will obviously affect the pass rate of production, not to mention that the smaller the diameter of the glass tube, the smaller the diameter of the exhaust stem is required, and when the actual aperture of the exhaust stem When it is below 0.9mm, it will also affect the pumping speed when exhausting (especially on automatic exhaust equipment), thereby affecting the vacuum degree in the lamp tube, and ultimately having a negative impact on product quality; on the other hand, shortening the filament The overall length will reduce the distance between the two guide wires connecting the two ends of the filament, thereby reducing the coating amount of electronic powder, and the reduction in the amount of electronic powder will significantly reduce the life of the fluorescent tube

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