JPS62278749A - Compact type fluorescent lamp - Google Patents

Abstract

PURPOSE:To aim at simplification of manufacture, by setting the space among the plural number of glass bulbs in a specified range, when the plural number of glass bulbs are arranged side by side and form one meandering discharge path. CONSTITUTION:Four parallel, straight tube type bulbs 30a and 30b, equal in length and coated with a fluorescent film on their inside walls 29, are joined to form a double U-shape with three tubular joining parts 31(s) and 32, so as to make one meander discharge path between the electrodes, thus a compact type fluorescent lamp 27 is constituted. In this case, gaps l3 between the straight tube type bulbs 30a(s) and 30b(s) which adjoins each other is set in the range of 2 to 9mm. And open end parts of the four bulbs 30a(s) and 30b(s) are arranged so as to be heated uniformly from the outside by a burner or the like to enable to seal stems 33a and 33b simultaneously. Thus, the number of steps in manufacturing process can be decreased and mass productivity can be increased and the material cost can be also lowered.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention The present invention mainly consists of four glass bulbs arranged closely in parallel, and each glass bulb forming a meandering discharge path. The present invention relates to a compact top-type fluorescent lamp configured to form a.

A compact fluorescent lamp with a meandering discharge path in a double U-shape consumes significantly less power than an incandescent bulb of the same brightness, and has a long lifespan, similar to that of an incandescent bulb. Because they are compact and easy to use, they have recently become popular in various lighting fields as an alternative to incandescent light bulbs.

This compact fluorescent lamp generally has, for example, four straight tube bulbs connected to form a double U-shaped discharge path, and the two sides of the conventional structure are shown in Figures 13 to 19.
This will be explained next with reference to FIGS. 20 to 26.

Compact fluorescent lamp (1) shown in Figures 13 to 15
In, (2a) (2b) - are four straight pipe valves of the same length, (3) (3)... are each valve (2a)
(2b) Fluorescent film formed on the inner peripheral surface of (4
a) (4b) ・= is each valve (2) (2) −・・
A stem enclosed in one end, (5), (5)...c, an exhaust pipe extending from each stem (4a), (4b)...
(6) (6)... are two stems (4a) (4b
) are lead wires drawn out two by two. (7) is 4
This is a cassop-shaped base made of resin or the like that is fixed to the end of the stem 1 of a book valve (2) (2) through an adhesive (8).

This compact fluorescent lamp (1) is manufactured in the manner shown in FIGS. 16 to 19. First, as shown in Fig. 16, fluorescent films (3) (3)...
Straight pipe valves (2a) (2b)...
Prepare many books. Next, as shown in FIG. 17, connect the lead wire (6
) (6) and the stem (4b) with electrodes having only the exhaust pipe (5) are sealed using a drop seal method, etc., and then each valve (2a) (2b)
Next, as shown in FIG. 18, one valve (2a) having a stem (4a) with an IA and a stem without electrode (= 1b)
A single valve (2b) having a stem side end is arranged to face each other in parallel with a minute interval 11 of about 1 crane, and both 4
The opposite surfaces of the non-stem side ends of the 1' valves (2a) and (2b) are locally heated and softened with a sheet burner (not shown) inserted between the opposite surfaces, while both valves (2a)
High pressure gas such as nitrogen gas is supplied from the exhaust pipes (5) (5) into (2b), and both valves (2a) (2b
) are bulged and welded to each other in a tubular shape, and the welded tubular valve connecting portion (
9) Then, connect and integrate the two valves (2a) and (2b) in a substantially U-shaped configuration to obtain a U-shaped valve (10). A large number of such U-shaped valves (10) are prepared.

Next, as shown in Figure 19, two U-shaped valves (1
0) (10), aligning the stem side ends of each valve (4a) (4a) with each electrode-attached stem (4a)
2a) (2a) and 1! Stem without poles (4h) (4
b) Valve (2b) with (2b) and minute interval 1
1 to face each other in parallel, electrodeless bulbs (2b) (2b
) is locally heated with a sheet burner (not shown), and the locally heated portion is swollen and welded into a tubular shape using high-pressure gas supplied into the valve. Two U-shaped valves (10) (10) are connected and integrated in a double U-shape with a valve connecting part (11),
A double U-shaped valve (12) is obtained.

The double U-shaped valve (12) heats and seals the exhaust pipe (5) that is not used as an exhaust pipe in the exhaust process, and then is sent to the exhaust process to exhaust impurity gas in the valve, activate the electrode, and perform necessary operations. After the inert gas and mercury are supplied, the exhaust pipe (5)... is sealed off. Thereafter, the base (7) is fixed to the stem end of the double U-shaped valve (12). The base (7) has, for example, I! shown in FIGS. 13 and 14. As shown by the lines, the four cap bottles (13) (13
) ... is attached, and the cap pin (
13) (13)... four lead wires (6) (6
)... are connected.

Compact fluorescent lamps (15
) is different from the above-mentioned fluorescent lamp (1) in the bulb sealing structure, and this fluorescent lamp (15) is different from the above fluorescent lamp (1).
It was manufactured in the manner shown in Figure 6 and had the following structure.

First, a large number of U-shaped valves (16) as shown in FIG. 23 are prepared. This U-shaped valve (16) is made by heating and softening the central part of a straight pipe valve and bending it into a U-shape. 16a) (16b) should be set to a minute interval of about 1 crane.Next, reheat the curved tube part (16c) of the U-shaped valve (16) to make this self-voiced part (16
c) into a two-part mold (17) as shown in Figure 24.
(17), high-pressure gas is sealed in the bulb, and the softened curved tube portion (16c) is molded into a substantially H-shape using a mold (17) (17). A large number of U-shaped valves (18) molded in this manner are prepared, and as shown in FIG. Each straight pipe valve (16a) (16
b) The opening ends of each of the opposing straight pipe valves (16b) (16b) of the two U-shaped valves ('18) (18) are arranged so that they face each other in parallel with a minute interval 12. The opposing surfaces of the parts are locally heated with a burner (not shown) to connect and integrate them into a tubular shape to obtain a double U-shaped valve (19).Next, although not shown, the inside of the double U-shaped valve (19) is After applying the phosphor suspension and firing, 4 straight tube bulbs (1
Fluorescence y on the inner peripheral surface of the opening end of 6a) (16b)...
! (20) is removed.

On the other hand, the 26th valve corresponding to the double U-shaped valve (19)
Prepare a ceramic base (2 mm) as shown in the figure. This base (2mm) is made of double U-shaped pulp (19
) is a dish-shaped thing that closes the open end of each straight pipe type valve (16a), (16b)..., and has four exhaust pipe insertion holes (22) (22)... on the bottom surface. This base (2
Frit glass (23) is applied on the bottom of the stem (2 mm), and two stems with electrodes (2
4a) (24a) and two stems without electrodes (24b)
) (24b) is erected and held. In addition, (2) of the drawing
5) (25)... is each stem (24a) (
24b) Exhaust pipe extending from (26) (2
6) ... is the stem with electrode (24a) (24a) to 2
The lead wires extend one by one, each with a ventilation hole (22) (
22) It is inserted into...

In this way, there are four stems (24a) on the base (2mm).
) (24b)..., and the base (2m
m) Press the open end of the double U-shaped valve (19) onto it. In this case, two unconnected straight pipe valves (16a) (16a) of the double U-shaped valve (19)
) inside the open end of the electrically attached stem (24a') (24
a) is stored, and the remaining two straight pipe valves (16b
) (16b) has an electrode heating stem (2
4b) Press the double U-shaped bulb (19) onto the base (2mm) so that (24b) is accommodated, hold it as it is, and pass the whole thing through a heating furnace to heat and melt the frit glass (23). . Then, the molten frit glass (23) is applied to the open end of each straight tube type bulb (16a) (16b)... of the double U-shaped bulb (19), and to each stem (24a) (24b)... The double U-shaped valve (19
) to seal the open end.

After that, each exhaust pipe (25) protrudes from the base (2mm)
(25) Use the double U-shaped valve (1
9) exhaust and air treatment are performed, and the exhaust pipe (25) (25
)...is sealed off.

Compact fluorescent lamps, which have four straight tube bulbs forming a double U-shaped discharge path, are more compact because they are often used as a replacement for incandescent light bulbs. In response to this requirement, efforts were made to place four straight pipe valves sufficiently close together, and currently, four straight pipe valves arranged at intervals of less than 1 fi are in practical use. There is.

By the way, suppose we hold four straight pipe valves with one end open or both ends open in parallel with the -open ends aligned and at intervals of a little less than 1 f1, and one at each aligned one open end. If you insert a total of four stems and attempt to seal them into the open ends of four straight pipe valves at the same time using the drop seal method or butt seal method, the spacing between the four straight pipe valves may be incorrect. Due to the narrow space, it was not possible to sufficiently heat and melt the inner part of the opening end into which the stems of the four straight pipe valves were inserted, so a compact design was developed in which the four straight pipe valves were placed close to each other in parallel. Type fluorescent lamps manufactured using the manufacturing process described above are in practical use, but these have the following problems.

Compact fluorescent lamp (1) shown in Figures 13 to 15
, four independent straight pipe valves (2a)
(2b)... fluorescent film on the inner surface of each (3) (3)...
・Process of forming each valve (2a) (2b)...
・A step of sealing the stem (4a) (4b)... into the open end of each valve (2a) (2b)...a step of sealing the other open end of the valve (2a) (2b)... Connect two of the four valves (2a) (2b)...
The process of manufacturing a double U-shaped valve (10), connecting two U-shaped valves (10) (10)
2) and the process of manufacturing four straight pipe valves (2a)
(2b)... requires many manufacturing steps to obtain the double U-shaped valve (12), making it difficult to mass-produce.
There was a problem of high manufacturing costs.

On the other hand, the compact fluorescent lamp (15) shown in FIGS. 20 to 22 includes a process of molding a U-shaped bulb (18).
The process of connecting two U-shaped bulbs (18) (18) to obtain a double U-shaped bulb (19), fluorescent I! inside the double U-shaped bulb (19)! (20), four stems (24a) (24b) are attached to the open ends of the four straight pipe valves (lea) (16b) of the double U-shaped valve (19). ...based on (2
mm) and the frit glass (23) and the manufacturing process are reduced, which has the advantage of being excellent in mass production. However, the ceramic base (2 mm) that simultaneously seals the open ends of the four straight pipe valves (16a) (16b) of the double U-shaped valve (19) is expensive. Second, the compact fluorescent lamp (15) has the problem of being expensive in terms of materials.

According to the present invention, a plurality of glass bulbs are disposed close to each other and each glass bulb forms a meandering discharge path, in which the plurality of glass bulbs The above-mentioned problem is solved by setting the distance between the valves within the range of 2 to 9 cranes.

Since the distance between the plurality of glass bulbs arranged in parallel in close proximity to each other is set to 2n to 911, it is possible, for example, to uniformly heat the open ends of four straight tube bulbs from the outside with a burner. Therefore, it is possible to simultaneously encapsulate the stems directly into the open ends of four straight tube bulbs, and a compact fluorescent lamp with fewer manufacturing steps and inexpensive materials can be realized. . Further, by widening the interval between the four straight tube bulbs, the amount of light emitted from the straight tube bulbs to the outside through the space between the straight tube bulbs increases when the compact fluorescent lamp is turned on.

Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 1 to 12.

In the compact fluorescent lamp (27) according to the embodiment of the present invention shown in FIGS. 1 to 3, (28) is a double U-shaped bulb forming a double U-shaped discharge path, and (29) is a double U-shaped bulb. This is a fluorescent film formed on the inner peripheral surface of (28). The double U-shaped valve (2 days) consists of four parallel straight pipe valves (30a) (30a) (30b) (
30b) and three tubular valve connecting parts (31) (31) (32) that connect these four in a double U shape.
The feature of this double U-shaped valve (28) is that the distance between adjacent four straight pipe valves (30a) (30b) is set within the range of 2 fl to 9. This is what was set. (33a) (33a) and (
33b) (33b) are four straight pipe valves (28)
Two stems with electrodes and two stems with electrodes sealed in the open end provided on the same side of the (34) (34)
... are exhaust pipes extending from each stem (33a), (33b)..., (35) (35)... are stems with electrodes (
33a) Two lead wires each extend from (33a), and (36) four straight pipe valves (30a) (30b).
)... is a resin base fixed to the stem side end of the stem via an adhesive (37).

The double U-shaped bulb (28) can be manufactured in the same manner as the double U-shaped bulb (19) of the compact fluorescent lamp (15) shown in FIGS. 20 to 22, which is advantageous in terms of man-hours. A specific example will be explained with reference to FIGS. 4 to 6. First, a U-shaped valve (
Prepare a large number of U-shaped valves (38).
The curved pipe section (38') of is heated and softened, and this curved pipe section (38'') is molded into two molds (39) shown in Fig. 5 (39
) to form a substantially H-shape to form a valve connecting portion (31). Two opposing molded U-shaped valves (40)
The distance between the straight pipe valves (30a) and (30b) is l. Next, two U-shaped valves (40)
(40) are arranged parallel to each other with an interval of 13, and as shown in FIG. A burner (41) with opposing end portions inserted into the valve.
(41) to melt and bulge outward with the force of the burner flame and weld them together to form two U-shaped valves (40).
(40) in a double U-shape (
32).

Next, a phosphor suspension is applied to the inner surface of the double U-shaped bulb (28) and fired to form a phosphor film (29).
Only the undesired fluorescent film (29) on the inner surface of the open end of each straight tube type bulb (30a), (30b), etc. is selectively removed.

The stem is enclosed in the double U-shaped valve (28) manufactured in this way, and the stem is inserted into each of the straight pipe valves (30a) (30b).
)... is large, so the open end of each straight pipe valve (30a) (30b)... can be heated relatively uniformly over the entire circumference with a burner, and the following It becomes possible to simultaneously encapsulate four stems (33a), (33b), etc. using a drop seal method, a bag-throat seal method, or the like.

Figures 7 to 10 show four stems (33a) (33b) at the four open ends of the double U-shaped valve (28).
This is to explain a device that simultaneously encloses ... by an irregular drop seal method that does not drop the current. (43) is the four mounting pins (42) (
42)... are supported in parallel at equal intervals and at the same height. 4 mount pins <42) (42
)... As shown in Fig. 8, stems with electrodes (33a) (33a) are inserted into the two ends of the stems in a horizontal row, and stems without electrodes (33b) (33b) are inserted into the remaining two ends. In this state, the mount pin (42) (
42) Right above the double U-shaped valve (28) 4
two opening ends facing each other and moving them relatively;
As shown in Fig. 9, the mounting pins (42) (42)...
Insert the upper stems (33a) (33b)... until they are in place. Specifically, two straight pipe valves (3
0a) Slightly inward from the opening end of (30a) [e.g. 1 to 2
The flared tips (m) (m) of the stems with electrodes (33a) (33a) are located at the same distance (about the size of a crane), and are slightly inward from the open ends of the remaining two straight pipe valves (30b) (30b).
For example, about 1 to 2 fi] with no electrode stem (33b)
Insert each stem so that the flared tip (mo) (mo) of (33b) is located. Then, the four mounting pins (42) (42)... and the double U-shaped valve 128) are rotated around the center line of the pin support (43), and at the same time the double U-shaped valve (28) is rotated. A large number of burners (
44) (44)... to flame (45) (45)...
・Heat the open end of the double U-shaped valve (2 days) by squirting ・, and heat the open end of the double U-shaped valve (2 days), and each straight pipe type valve (30a) (30b)...
・Open end and stem (33a) (33b)・
Weld the flared tips (m) (m') of... to the four stems (33a) <33b
)... will be included at the same time.

When the stem is enclosed, the flame (45) from one burner (44) is connected to each rotating straight pipe valve (30a).
(30b) directly heats the outside of the open end I11 of..., and also directly heats the inside of the open end of the straight pipe type valves (30a), (30b)... through between the valves in the gap V113. Therefore, each straight pipe type valve (30a)
The open ends of (30b)... are relatively uniformly and sufficiently heated, and the four stems (33a) (33b)...
It is possible to simultaneously encapsulate. The valve spacing 13 is set to a size that allows the burner flame (45) to pass through easily, but if the pipe outer diameter of the straight pipe type valves (30a) (30b)... is 16.
．． In the case of common sizes of 5 to 17.5 m, if the valve interval 13 is less than 2 days, the passage of the burner flame (45) is not very good, and in such cases, the valve interval 13 should be 2 or more days, especially 4 days or more. As a result of experiments, it has been found that it is effective to successfully encapsulate four stems simultaneously using the drop seal method.

In addition, the larger the valve interval 13, the better the passage of the burner flame (45) between the valves, but the larger the interval 13, the larger the lateral size of the double U-shaped valve (28), which makes it more compact. The compactness of the fluorescent lamp (27) will be impaired, and furthermore, it will be difficult to make the bulb connection part (32) of the double U-shaped bulb (28) with the necessary wall thickness, but these two problems are solved by the spacing. It is known that there is almost no problem if 13 is 9u or less.

Further, some compact fluorescent lamps have a standardized pace width of 44 tm, and in such lamps, the upper side of the interval 13 is approximately 7n.

Figures 11 and 12 show four stems (33a) (33b) at the four open ends of the double U-shaped valve (28).
This is to explain a device for simultaneously enclosing ... by the butt seal method.The difference between this and the drop seal method described above is that there is a ring below the tips of the four mount pins (42) (42)... The shaped burners (46) (46)... can be arranged vertically in the same way, and each mount pin (42)
(42) The stem (3
3a) (33b)..., the flare tip (n) (
The outer diameter of n')... is straight pipe type valve (30a) (30b
)... should be used with the same size as the outer diameter of...

Therefore, stem encapsulation using the butt seal method is performed in the following manner. A stem (33a) held by four mounting pins (42) (42)... in the open end of each straight pipe valve (30a) (30b)... of the double U-shaped valve (28)... ) (33b)... are inserted, and the outer peripheral surfaces of their flared tips (n) (n'')... are brought into contact with the open end surfaces of the straight pipe valves (30a) (30b)....

In this state, flames are emitted from a large number of nozzles (47) (47)... provided on the top surface of the ring-shaped burner (46) (46)... surrounding each mount pin (42) (42)... (48) (4B)... and each stem (33
a ) (33b) Flare tips (n) (n'
)...and straight pipe valves (30a) (30b
)...'s open end is heated and welded.

In stem encapsulation using such a butt seal method,
If the valve interval 13 is smaller than 2fi, it becomes difficult to arrange the four ring-shaped burners (46) (46)... around the four mount pins (42) (42)... Two stems (33a) (33b)...
Since it becomes difficult to simultaneously encapsulate ., the interval 13 is set to 2 mm or more.

Note that the present invention is not limited to the above embodiments,
For example, a glass bulb with a meandering discharge path can be constructed by connecting two independent straight tube bulbs in a U-shape, and then connecting two of these U-shaped bulbs in a double U-shape. . In addition to four glass bulbs, five or more glass bulbs can also be used.

According to the present invention, it is easily possible to simultaneously encapsulate a plurality of stems into the open ends of a plurality of glass bulbs configured to form one meandering discharge path. Therefore, it is possible to provide a compact fluorescent lamp that can be mass-produced with less manufacturing time. Further, the stems can be simultaneously enclosed in the open end portions of a plurality of glass bulbs without using an expensive ceramic base, thereby providing a compact fluorescent lamp that is low in material cost. In addition, by widening the distance between the glass bulbs, the amount of light from the straight tube bulbs passing between the bulbs increases when the lamp is lit, and conversely, the amount of light absorbed by the adjacent bulbs decreases, causing the lamp to turn on. The brightness when turned on can be improved.

[Brief explanation of drawings]

Fig. ff11 and Fig. 2 are a front view and a side view including a partial cross section showing an embodiment of the compact fluorescent lamp according to the present invention, Fig. 3 is a bottom view of the fluorescent lamp of Fig. 1, and Fig. 4 Figures 6 to 6 are perspective views of bulbs at each step to explain examples of the manufacturing process of the fluorescent lamp in Figure 1, and Figures 7 to 10 show how the double U-shaped bulb in Figure 6 is manufactured using the drop seal method. This is to explain the device for enclosing the stem. Figure 7 is a perspective view of the valve, stem, and mount pin, and Figure 8 is a perspective view of the valve, stem, and mount pin.
FIG. 9 is a partially enlarged sectional view of the stem enclosing device, FIG. 310 is a sectional view taken along line A-A in FIG. 9, and FIG. FIG. 12 is a partial schematic cross-sectional view taken along the line BB in FIG. 13 to 19 are for explaining an example of a conventional compact fluorescent lamp, and FIGS. 13 and 14 are a front view and a side view including a partial cross section of the fluorescent lamp,
Figure 15 is a plan sectional view of the fluorescent lamp in Figure 13;
Figures 19 to 19 are! 813 is a bulb perspective view at each step showing the manufacturing process of the fluorescent lamp in FIG. 813. FIG. FIGS. 20 to 26 are for explaining an example of another conventional compact fluorescent lamp, and FIGS.
The mm diagram is a front view and side view including a partial cross section of the fluorescent lamp, and FIG. 22 is a plan sectional view of the fluorescent lamp in FIG. 20.
Figures 23 to 25 are perspective views of the bulb at each step showing the manufacturing process of the fluorescent lamp in Figure 20, and Figure 26 is the bulb and base when the stem is enclosed in the double U-shaped bulb in Figure 25. FIG. 2 is an enlarged side sectional view. (30a) (30b) - Straight pipe valve, 1
3---interval. 1. Electronics Co., Ltd., Jiangwon Province, A7 drawing

Claims (1)

[Claims] (1) In a structure in which a plurality of glass bulbs are arranged close to each other and each glass bulb forms one meandering discharge path, the distance between the plurality of glass bulbs is 2mm to 9
A compact fluorescent lamp characterized by being set within the range of mm.