JPS5949151A - Fluorescent lamp - Google Patents

Abstract

PURPOSE:To obtain a fluorescent lamp capable of completely preventing crosstalk discharge while being suitable for mass production by inserting a screening body penetrated by an electrode lead into the recessed part formed on the opening end part of an envelope so as to plug said recessed part. CONSTITUTION:Electrode parts are fixed to a cover 12 while being provided on a luminous envelope 1. That is to say, that any electrode part is fixed with glass frit 5 while the part of a glass piece 13 being inserted into the recessed part 14 provided on the cover 12. Further, the column screening parts 15 made of the same metal material with that of the cover 12 are fitted into the recessed part 14 while being fixed by spot welding or the like. The screening parts 15 are inserted into the recessed part 16 provided on the opening end part of the envelope inner body 3 so as to plug said recessed part. By means of said screening parts 15, abnormal discharge generated between two electrodes 7 through a gap between the opening end part of the envelope outer body 2 and the opening end part of the envelope inner body 3 can be completely prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to compact fluorescent lamps.

Conventional configuration and problems Incandescent light bulbs exhibit a warm, desirable light color and excellent color rendering, are easy to use, and are compact and high-intensity lamps, making it easy to control light distribution when combined with lighting equipment. It has been widely used for general lighting in homes, stores, etc. However, in the era of energy saving, the only drawback of incandescent light bulbs, their low efficiency, has become a problem, and recently there has been a demand for the development of high-efficiency compact discharge lamps that can replace incandescent light bulbs.

Anticipating such a situation, the inventors have already filed a patent application in 1972.
-30659 (Refer to Special Publication No. 57-37105)
, Japanese Patent Application No. 55-64510 (Japanese Patent Application No. 16075-1982)
(see Publication No. 3), we proposed a new compact fluorescent lamp to replace incandescent light bulbs.

As shown in FIGS. 1(a) and 1(b), this fluorescent lamp has a container outer body 2 made of a translucent glass material and having a spherical or cylindrical curved outer shape. The light-emitting container 1 is constructed by inserting and overlapping container inner bodies 3 made of the same material. The openings 4 of the container outer body 2 and the container inner body 3 are joined to each other by, for example, a glass frit 5 or the like. In addition, the container inner body 3
A groove 6 forming a discharge path is provided in a meandering manner to form one continuous discharge path, and two electrodes 7 are held at both ends by internal lead wires 8. Furthermore, an external lead wire 9 is connected to the internal lead wire 8 . The inner surface of the container outer body 2 and the outer surface of the container inner body 3 are coated with a phosphor 1o at least in the grooves 6. The inside of the groove 6 is still evacuated through the exhaust pipe 11 and is filled with excess mercury and rare gas.

As the next step, the inventors began manufacturing the above-mentioned compact fluorescent lamp. However, during manufacturing, (a) the container inner body 3 in which the groove 6 is formed is damaged by atmospheric pressure, and (b) it is relatively difficult to seal the electrode parts, causing the position of the electrode 7 to shift. It has become clear that there is a problem in that the rate of occurrence of leaks and cracks at the sealed portion of the internal lead wire 8 is high. Among the above-mentioned problems, the former, damage to the container inner body 3, is a problem unique to this type of fluorescent lamp, and the inventors have searched for a solution to this problem.

In the end, we determined that the problem could not be completely solved by increasing the mechanical strength of the inner body 3 of the container, and so we decided to 1
A new basic structure was proposed in which the opening of the container was covered with a stem or the like so that atmospheric pressure would not be applied to the inner container 3.
No. 4511 (see Japanese Patent Application Laid-open No. 160764/1983).

The inventors have since been considering the mass production of fluorescent lamps based on the new structure described above. However, it has been found that a new problem associated with such a structure is that so-called crosstalk discharge is relatively likely to occur between the two electrodes.

OBJECTS OF THE INVENTION An object of the present invention is to provide a fluorescent lamp that can completely prevent the above-mentioned crosstalk discharge and is suitable for mass production.

Structure of the Invention The fluorescent lamp of the present invention includes a container outer body made of a glass material having a curved surface and a container inner body which are superimposed on each other to form a discharge path in at least the container inner body. A serpentine groove is provided, electrodes are provided at both ends of the groove, and a phosphor is coated on all or part of the inner surface of the outer container body or the outer surface of the inner container body, and the A lid is sealed near the opening of the outer body of the container, an electrode component including the electrode is held in the lid, and rare gas and mercury are introduced into the interior surrounded by the outer body of the container and the lid. The electrode component includes the electrode and a lead body for holding the electrode, and a recess is formed at the open end of the container inner body or the container outer body, and A shielding body is inserted into the recess so as to close the recess, the lead body passes through the shielding body, and the electrode is positioned in the groove.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 2 shows the compact fluorescent lamp of this embodiment. In the figure, 1 is a luminous envelope, 2 and 3 are an outer body and an inner body made of glass, respectively, and the inner body 3 is provided with a meandering groove 6. . Electrodes 7 are provided at both ends of the groove 60. The inner surface of the container outer body 2 and the outer surface of the groove 6 portion of the container inner body 3 are coated with a phosphor. Opening of the container outer body 2] Along the periphery of the part 4, a metal material l of Ni 42%-Cr 6%-Fe 5'
A lid 12 made of 2% iron alloy is sealed with a glass frit 5. Electrode components including an electrode element, which will be described later, and the exhaust pipe 11 are sealed to the lid 12 using the same glass frit 6. The entire area, including the groove 6, surrounded by the container outer body 2 and the lid 12 is evacuated through the exhaust pipe 11, and then filled with 2.5 to 3.5 Torr of argon and excess mercury. . In this structure, the area of the groove 6 and the internal area of the container inner body 3 are in communication, and atmospheric pressure is not applied to the container inner body 3, so that damage to the container inner body 3 can be completely prevented. In fact, with an extremely simple structure in which the electrode parts are joined to the lid 12, a compact fluorescent lamp suitable for mass production is realized.

The structure of the above electrode component is shown in FIG. In this electrode component, an electrode 7, an internal lead wire 8, and an external lead wire 9 are electrically and mechanically connected, and the external lead wire 9 is integrated with a glass piece 13.

Such electrode parts are shown in FIGS. 4(a) and 4(b).
As shown in FIG. 2, it is fixed to the lid 12 and provided to the light emitting container 1. That is, in the electrode bipolar component, the glass piece 13 is inserted into the recess 14 provided in the lid 12 and fixed by the glass frit 5.

Further, a cylindrical shielding component 15 made of the same metal material as the lid 12 is fitted into the recess 14 and fixed by spot welding or the like.

The shielding component 15 is inserted into a recess 16 provided at the open end of the container inner body 3 so as to close the recess. Due to this shielding component 15, abnormal discharge occurs between the two electrodes 7 through the gap between the open end of the container outer body 2 and the open end of the container inner body 3. Cross-steering discharge is completely prevented.

In contrast, when no shielding component is provided, crosstalk discharge occurs at an incidence of about 5% in mass-produced fluorescent lamps.

Therefore, as described above, the fluorescent lamp using the shielding component 15 has a simple structure and can completely prevent the above-mentioned crosstalk discharge, and can be said to be superior in mass production. .

Note that the shielding component 15 does not necessarily need to be made of the same metal material as the lid 12, nor does it need to be made of a metal material.
In short, any material may be used as long as it is provided near the inside of the lid 12 and fulfills the shielding function. Furthermore, the shielding component does not necessarily need to be applied to both electrode components, but may be applied to either one.

As described in detail, the present invention is 1'! The present invention solves the quality problems of compact fluorescent lamps in , and provides a fluorescent lamp that is useful as an energy-saving light source as an alternative to light bulbs and is highly mass-producible.

[Brief explanation of the drawing]

Fig. 1 (→, (b) is a partially cutaway vertical cross-sectional view of a conventional compact fluorescent lamp and a cross-sectional view taken along the same <X-X line; Fig. 2 is a compact fluorescent lamp according to an embodiment of the present invention. FIG. 3 is a partially cutaway vertical sectional view of the lamp, FIG. 3 is a perspective view of the electrode parts, and FIGS. 1... Luminous envelope, 2... Envelope outer body,
3...Container inner body, 6...Glass frit, 6...Groove, 7...Electrode, 8...
...Internal lead wire, 9...External lead wire, 1Q
...fluorescent body, 11...lid, 14...
... recess, 16... shielding component, 16...
...concavity. Name of agent Patent attorney Toshio Nakao and 1 other person21 Figure 1 ((1) Figure 2 1/3rd TI!J

Claims (1)

[Claims] A container outer body made of a curved glass material and a container inner body are overlapped, and at least a meandering groove for forming a discharge path is provided in the container inner body, and both ends of the groove are provided. an electrode is provided on the outer surface of the container, and a phosphor is coated on the entire or part of the inner surface of the outer container body or the outer surface of the inner surface of the container, and a lid is provided near the opening of the outer container body. an electrode component including the electrode is held in the lid, a rare gas and mercury are sealed in an interior surrounded by the outer body of the container and the lid, and the electrode component includes the electrode. and a lead body for holding the electrode, a recess is formed at the open end of the inner container body or the outer container outer body, and a shielding member is provided so as to close the recess. , wherein the lead body passes through the shield body and the electrode is located in the groove.