JPH02819B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a low-pressure discharge lamp in which a discharge path is formed using partition walls.

In recent years, due to the strong social demand for energy conservation, various improvements have been made to various lighting devices in an effort to save energy.

Many attempts have been made in the field of incandescent light bulbs, including an attempt to miniaturize fluorescent lamps, which are high-efficiency low-pressure discharge lamps, to replace incandescent light bulbs with low efficiency.

As one method for downsizing a fluorescent lamp, a conventional linear discharge path is replaced with a partition wall inside the discharge vessel, as shown in FIG. 1 and FIG. 2, which shows a cross-section of FIG. There is a method of creating a discharge path as long as possible within a small space by bending it as many times as possible.

This method of using partition walls can efficiently create a long discharge path in a small space, and is one of the most suitable methods for creating small fluorescent lamps that can replace incandescent light bulbs.

However, in this bulkhead-shaped fluorescent lamp,
Conventionally, cylindrical or spherical glass tubes or glass bulbs have been used as discharge containers, so it is necessary to use welding or special methods to fix partition plates made of glass plates, metal plates, etc. Yes, it takes a lot of time to manufacture the lamp, and
Since the phosphor cannot be applied to the welded area, it may be visible from the outside of the lamp, and the phosphor may peel off at the contact area between the partition wall and the discharge container.
After all, the phosphor is visible from the outside of the lamp, and in this case, there are problems such as the peeled-off part of the phosphor spreads further due to vibrations during transportation of the lamp. In addition, due to the dimensional tolerance between the diameter of the discharge container and the partition wall, the partition wall may not enter the discharge container, or even if it does, the adhesion between the partition wall and the wall of the discharge container may be insufficient, causing a short-circuit phenomenon in the discharge and preventing normal characteristics. There were drawbacks such as the inability to mass-produce with a high yield.

The present invention provides the above-mentioned bulkhead-shaped discharge lamp,
By making the discharge container polygonal instead of the conventional cylindrical or spherical shape and making the partition wall non-linear and inserting and fixing it into the discharge container, the dimensional tolerance between the discharge container and the partition wall can be absorbed and the partition wall can be easily fixed. The purpose of this invention is to simplify the mass production of lamps and to improve the above-mentioned drawbacks.

FIG. 3 is a front view of a bulkhead type fluorescent lamp showing an embodiment of the present invention, and FIG.
FIG. 5 is a cross-sectional view showing the partition material before being inserted into the discharge container. In the figure, 1 is the entire lamp, 2 is a polygonal discharge container made of glass,
3 is a lighting device accommodating part made of plastic; 4 is an E26 type cap, which is the same as an incandescent light bulb; 5 is a corner of a polygonal discharge container; and 6 is a bent part 14 near the center of the discharge container. 7, 8 are electrodes, 9, 10, 11,
12 is a discharge path separated from each other by a partition wall 6;
3 indicates a phosphor coating.

The partition wall 6 is fixed in close contact with a corner 5 provided in the discharge container 2, and is arranged to divide the space inside the discharge container 2 into required discharge paths. Diameter l of partition wall 6A before insertion of discharge container in Fig. 5
is formed to be slightly larger than the inner diameter L of the discharge container 2 shown in FIG. 4, and can be easily inserted into the discharge container 2 by narrowing the non-linear bent portion 14 of the partition wall 6A. In this case, after insertion, it is well fixed in the discharge container 2 due to the spring effect of the non-linear bent portion 14 of the partition wall. Therefore, the adhesion between the wall of the discharge container 2 and the partition wall 6 is good, and they do not shift even under the influence of vibration or thermal expansion, and short-circuit discharge does not occur.

Furthermore, the electrodes 7 and 8 are arranged on the lighting device accommodating portion side of the discharge container 2, separated by a partition wall 6. The phosphor composite film 13 is coated on the inner wall of the discharge container 2, and an appropriate amount of mercury and rare gas such as argon is sealed inside the discharge container 2.

A lighting device for lighting this lamp is housed inside the lighting device container 3.

When the bulkhead type fluorescent lamp of the present invention having the above-described structure is screwed into a socket and connected to a power source in the same way as an incandescent light bulb, the lamp is started by the lighting device housed inside the lighting device container 3. ,
The discharge current passes through the discharge path 9 from the electrode 7 disposed on the lighting device side at one end of the discharge path 9, enters the discharge path 10 from the top side of the lamp, passes through the discharge path 10, and enters the discharge path 11 from the lighting device side. enters the discharge path 11, enters the discharge path 12 from the top side of the lamp, and enters the discharge path 1
2, the discharge path flows through a bent discharge path that reaches electrode 8 disposed on the lighting device side of discharge path 12, and discharge occurs between electrodes 7 and 8. Similar to a general fluorescent lamp, the ultraviolet rays generated by this discharge cause the fluorescent coating 13 coated on the inner wall of the discharge vessel to emit light, emitting visible light outside the lamp. Of course, this visible light can be arbitrarily changed depending on the phosphor used.

In the above embodiment, a rectangular glass tube was used as the discharge container, but the discharge container is not limited to a rectangular shape, and may be any polygonal shape. For this purpose, a square to hexagonal shape is preferable. Triangular shapes require electrodes to be placed at both ends, making it inconvenient to create a lamp with a cap on one side, such as an incandescent light bulb.Furthermore, if the shape is more than 17 squares, the angle of the corner 5 becomes too large; Problems arise in the fixation of bulkheads, especially when
The fluorescent material tends to peel off due to vibrations during transportation.

The discharge paths in the above embodiments were formed so that the discharge progresses while bending into adjacent spaces.
The discharge path is not limited to this, and various shapes may be applied as necessary.

In addition, in the above embodiment, a container having a flat plate shape, that is, a linear shape was used between the corners, but the space between the corners is not limited to a straight line, and the distance between the corners (adjacent corners It may also be an arcuate shape having a radius larger than the straight line distance between the parts.

It goes without saying that the non-linear shapes of the partition walls are not limited to those of the embodiments, but also include non-linear shapes of various shapes as shown in FIGS.

Furthermore, in the above embodiment, the top of the lamp was made into a dome shape, but this top is not limited to a dome shape.
It may be of any shape as required, such as a flat plate shape or an uneven shape.

As mentioned above, in order to downsize a low-pressure discharge lamp, a partition wall is provided in a discharge vessel to form a bent discharge path in a small space. By using a polygonal discharge vessel instead of a vessel and fixing elastic partitions with non-linear shapes at the corners of the vessel, the effects of dimensional tolerances between the discharge vessel and the partitions can be eliminated, and the lamp can be facilitates manufacturing, and
This prevents the phosphor from peeling off. Also,
In this invention, since the contact with the partition wall of the discharge vessel is along the corner of the vessel, even if the phosphor at the contact part peels off to some extent, it will not work if the discharge vessel is cylindrical or spherical. This also produces favorable effects in terms of design, such as the fact that it does not look bad in comparison.

[Brief explanation of drawings]

FIG. 1 is a front view of a conventional partition wall type fluorescent lamp, FIG. 2 is a cross-sectional view of FIG. The figures are a cross-sectional view taken from the side shown in FIG. 3, FIG. 5 is a cross-sectional view of the partition wall, and FIG. 6 is a cross-sectional view showing other embodiments of the partition wall. The same symbols in the figures indicate the same or corresponding parts, 2
is a discharge container, 3 is a lighting device housing part, 4 is a base,
5 is a corner, 6 is a partition, 7, 8 is a cap, 9, 10,
11 and 12 are discharge paths, 13 is a fluorescent coating, and 14 is a bent portion of a partition wall.

Claims (1)

[Claims] 1. A translucent discharge container is divided into a plurality of compartments by a partition wall, a part of the partition wall is opened, and the compartments are connected to each other through the opening to form a meandering discharge path. In the device in which electrodes are provided at both ends of the discharge path, the discharge container is formed into a polygonal shape, and the partition wall is formed into a non-linear shape with elasticity, and the ends of the partition wall are connected to the discharge container. is fixed to a corner of the partition, and the straight line distance from the center of the partition to the tip before insertion into the discharge container is longer than the distance from the center of the discharge container to the corner inscribed with the partition. Low pressure discharge lamp.