JPS58220333A - Fluorescent lamp and manufacture thereof - Google Patents

Abstract

PURPOSE:To increase the whole luminous flux in a fluorescent lamp using in place of an incandescent lamp by making it possible to take the fully long tube length than a saddle type luminous tube. CONSTITUTION:While a linear type bulb 2 is bent into a U-shape approximately halfway of its both ends 3 and 4 to form the first bent part 5, the part connected with one end part of said first bent part 5 is bent in the opposite direction to said first bent part 5 into the about U-shape on the same plane with the plane including said U-shape in order to form the second bent part 6. Next, the middle parts along the axial direction of the linear parts 7, 8 and 9 are bent into the about U-shape in the direction about orthogonal to the plane including said S-shape in order to form three of the third bent parts 10, 11 and 12 in the same direction side by side between one end part 3 and the first bent part 5, between the other end part 4 and the second bent part 6 as well as between the first bent part 5 and the second bent part 6.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a fluorescent lamp used in place of, for example, an incandescent light bulb, and a method for manufacturing the same.

[Technical background of the invention and its problems]

Recently, incandescent light bulbs have become an alternative to incandescent light sources from the perspective of power saving, and fluorescent lamp devices have been put into practical use that are also highly efficient and can be used by directly plugging into existing light bulb sockets. It is becoming widely used for lighting.This fluorescent lamp device has an arc tube and a lighting device for lighting the arc tube, which are housed in a bulb-shaped envelope with a base. The light source is similar to that of a light bulb.The luminous tube of this type of device is U-shaped?A special shape that is bent is used to achieve the highest possible efficiency in the limited space inside the envelope. The maximum discharge path length is ensured so that At the same time, a distance t1 between the curved portion and both end portions is curved in a substantially U-shape in a direction substantially perpendicular to the plane containing the above-mentioned shape, and the curved portion and the curved portion ?
They are called adjacent to each other.

By the way, in the device used to replace incandescent light bulbs, it is possible to improve light output and luminous efficiency in order to monitor the need for power saving, which will become increasingly important in the future. Research and development is being pushed forward to achieve this goal. It goes without saying that increasing the length of the tube and elongating the positive column that mainly contributes to light emission is effective in increasing light output and efficiency, but since most of the arc tube is housed within the envelope, However, with the shape as described above, no increase in tube length can be expected, and there is a strong focus on developing new arc tubes.

[Purpose of the invention]

The present invention was made based on these circumstances, and
The first purpose is to control the saddle-shaped arc tube. A fluorescent lamp that can be made sufficiently long so that the total luminous flux can be increased compared to the violet one, and that has a compact overall shape similar to the saddle-shaped arc tube mentioned above? This is what we are trying to provide. Furthermore, the second object of the present invention is to
Is this a fluorescent lamp with the above shape? The purpose is to provide an easy manufacturing method.

[Summary of the invention]

That is, the first invention involves bending straight tube-shaped pulp into a substantially S-shape, arranging three straight parts parallel to each other in the same plane, and forming an intermediate part of these straight parts [including the above-mentioned S-shaped part]. The first objective is to be achieved by obtaining a purple arc tube pulp curved in a substantially U-shape in a direction intersecting a plane.

Also, does the second invention meet the above-mentioned second purpose? In order to achieve this, three straight parts are formed in the same plane by bending the straight pulp into a substantially S-shape. The process of installing them in parallel and apart, and the middle part of these straight parts? The S shape above? An arc tube pulp bending process consisting of a process of bending the arc tube pulp into a substantially U-shape in a direction intersecting the containing plane.
It is characterized by the following features:

[Embodiments of the invention]

The following will describe an embodiment of the present invention shown in drawing t1. In the drawing, 1 is an arc tube of a fluorescent lamp? As shown, this arc tube 10
The arc tube bulb 2 is bent and formed as follows. First, a straight pulp tube with both ends opened is bent into a substantially S-shape in the same plane. That is, the above straight pipe pulp is
The first part is bent into a substantially U-shape in the middle of both ends 3.4.
A curved portion 5 is formed, and a partial molecule 1 connected to one end of the first curved portion 5 faces toward the opposite side from the first curved portion 5 within the same plane as the plane including the U-shape. te abbreviation U
The second curved portion 6 is formed by bending it into a letter shape. Due to this bending, both ends 3 and 4 of the arc tube pulp 2 are oriented in opposite directions 4, and one end 3 and the first curved part 5 are connected to each other, and the other end 4 and the second curved part are connected to each other. 6, and three straight portions 7/, II, and 9, which are connected to the first curved portion 5 and the second curved portion 6 by t, are arranged in parallel and apart from each other.

Next, by bending the intermediate portion t1 along the axial direction of the straight portions 1, 8.9 into a substantially U-shape in a direction substantially perpendicular to the plane containing the S-shape as shown in FIG. The end part 3 and the first curved part 5, the other end part 4, the second curved part 6 and the first
Between the bending part 5 and the second bending part 6, three third bending parts J □ s 11 m1 are located adjacent to each other in the same direction.
1'i form. Therefore, make this ↓ bend, one end 3 and #I2 bending part 6, and the other end 4 and jI
The first curved portions 5 are located adjacent to each other in the same direction, and the third curved portions 10 and 11 are arranged opposite to each other on both sides of 12, and both end portions 3.4 are square diagonal corners. The arc tube pulps 2 arranged in a positional relationship are completed. Macintoshes 14.14 having electrodes 13.degree. 13 are sealed to both ends 3.4 of the arc tube pulp 2. Further, a phosphor coating is applied to the inner surface of the pulp 2, and a predetermined amount of mercury and an inert gas are sealed in the pulp 2, thereby forming the above-mentioned arc tube 1.

According to the fluorescent lamp having the above-mentioned shape, the first curved section 5, the second curved section 6, and the three third curved sections 10.degree. .12, the discharge path length is significantly increased compared to conventional saddle-shaped arc tubes, and the light output and efficiency are improved. Moreover, despite the long discharge path length, each of the bending parts 5, 6 and 10,
Since the lamps 11 and 12 are adjacent to each other, the height and width of the lamp as a whole are small and compact.

Further, if the arc tube pulp 2 has the above shape, the three third bent portions 1 are
0,11. Therefore, when compared with the saddle-shaped arc tube, the number of visible curved parts increases and the luminous flux from this part increases.In addition, this lamp has both ends 3 and 4. Since the lamps do not need to be lined up next to each other, there is less light on one side compared to a saddle-shaped arc tube, and there is an advantage that the luminous flux distribution around the lamp can be made more uniform.

Furthermore, since this fluorescent lamp is compact as mentioned above, if the tube axis length of the arc tube pulp 2 is appropriately set in relation to the tube diameter, the overall length of the fluorescent lamp can be kept approximately equal to that of a 60-100W class incandescent lamp. For example, if this fluorescent lamp' is housed together with the lighting device in a light bulb-shaped envelope with a cap such as E26m, it can be installed directly into an existing light bulb unit. It can be used as a power-saving light source. In this case, the fluorescent lamp or arc tube 1 has both ends 3.4
Since it will be stored with the position facing the r cap side, is it the cap? When lit vertically with the light facing upward, the third
The bending portions 10, 11, and 12 face downward, so that the illuminance directly below is directed toward the area -L, providing sufficient brightness for general illumination. In addition, since the two end portions 3.4 are arranged diagonally in parallel to each other in a rectangular shape, they can be used as fluorescent lamps. When installing on the envelope side, both ends J9. ,．． 4 It is efficient in that it can be stabilized just by supporting it.

Further, if the above-described bending method r is adopted, a normal straight pipe type valve is simply bent, so that it can be manufactured easily even though it has a complicated shape. That is, the arc tube pulp 2 is prepared by a method other than the above, for example, by arranging three U-shaped pulps in parallel, and connecting the adjacent openings of these U-shaped pulps to each other by connecting one to the two U-shaped pulps. However, this method requires a pulp connecting process in addition to bending, which increases the number of work steps and requires time and effort. However, according to the method of the present invention, since it is sufficient to simply bend the pulp, the number of man-hours required is small, and the method has the advantage of being easy and inexpensive to manufacture.

〔Effect of the invention〕

The first invention described in detail above has three straight parts arranged in parallel and spaced apart in the same plane in the straight pipe type valve bent into a roughly S-shape, and the middle part of these straight parts has an upper S-shape. Since the arc tube bulb is formed in a substantially U-shape shape in the direction that intersects the plane containing the shape, the discharge path length has been significantly increased compared to the conventional saddle-shaped arc tube, resulting in increased light output and efficiency. Eli improves. Even though the discharge path length is long, the height and width dimensions of the lamp as a whole are small.
The whole thing is compact. Moreover, with this shape of the arc tube pulp, it is possible to reduce the curved portion by 3 kg when viewed from the opposite side from both ends of the lamp, which is observed when compared with the saddle-shaped arc tube described above. The number increases, and the luminous flux from this part increases. In addition, since both end portions do not need to be lined up next to each other, there are effects such as less unilateral deviation of light and uniform luminous flux distribution around the lamp.

Further, according to the second invention, when molding the arc tube pulp, it is sufficient to simply bend and mold the ordinary straight tube pulp, even though the arc tube pulp has a complicated shape. , which has the advantage of being easy and inexpensive to manufacture.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIGS. 1 to 3 are process diagrams showing the procedure for bending arc tube pulp, FIG. 4 is a front view, FIG. 5 is a side view, and FIG. 6 is a plan view. FIG. 7 is a bottom view. 0 2... Arc tube pulp, 5, 7.8... Straight part. Applicant's agent Patent attorney Takehiko Suzue 144- Figure 4 1 Figure 6 3 Figure 5 5 145

Claims (2)

[Claims] (1) By bending the straight pipe valve into a roughly S-shape, there are three straight parts in the same plane? Is the middle part of these straight parts parallel to each other separated from each other in an S-shape? Equipped with an arc tube bulb that is bent into a substantially U-shape in a direction that intersects the plane containing the bulb.What is the next thing? Features a fluorescent lamp. (2) Three straight parts in the same plane by bending the straight pulp into an S-shape? The arc tube pulp bending step includes a step of arranging the arc tube pulp in parallel and apart from each other, and a step of bending the intermediate portions of these straight portions into a substantially U-shape in a direction intersecting a plane including the above-mentioned S-shape. A method of manufacturing a fluorescent lamp.