JPS62202453A - Incandescent lamp - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an incandescent light bulb, and more particularly to a structure in which a filament and a supporting conductor in an incandescent light bulb are connected through a full sleeve.

[Shuuki no Bojutsu] The conventional incandescent light bulb shown in Figures 5 and 6 was manufactured in
- The incandescent light bulb shown in Publication No. 14835,
As shown in the figure, a metal sleeve 3' made of molybdenum or the like is fitted onto the end 2 of the filament 1, and the outer surface of the metal sleeve 3' is welded to the outer periphery of the support conductor 4. The support wire 4 has a support structure that supports the filament 1 inside the bulb by sealing the entire bulb to the bulb. In this support structure, the sleeve 3' contacts the support conductor 4 by line contact.

[The problem that the problem is trying to solve]

However, conventional incandescent light bulbs have the following drawbacks.

1) Even though the only necessary part of the sleeve is the part in line contact with the supporting conductor 4, it has a cylindrical structure;
Parts other than the line contact parts are also unavoidably required, and a large amount of metal such as molybdenum is required to manufacture the sleeve. Therefore, it is difficult to reduce the cost of the product.

2) Forming the sleeve into a cylindrical shape M If the manufacturing process is complicated, the yield is low, and the processing cost is high.In other words, when manufacturing a metal cylinder, it is not possible to obtain it by cutting a wide plate. A cylindrical sleeve must be manufactured by rolling the tape or the tape obtained by rolling cut wire.In order to obtain such a cylindrical sleeve, It is not always easy to process the sleeve, and it tends to leave flakes on the end of the sleeve, which may make it difficult to insert the end of the filament.

3) Next, when the outer surface of the sleeve is welded to the support conductor, the cylindrical sleeve is flattened so that it comes into contact with the support conductor. At this time, since the support conducting wire is cylindrical, as is clear from FIG. 2, it only makes line contact with the outer surface of the sleeve, and the strength of the welded portion is unstable.

SUMMARY OF THE INVENTION In view of the above drawbacks, the present invention provides an incandescent light bulb that can achieve the following objects.

1) An incandescent light bulb that can reduce the cost of the product by removing unnecessary parts of the sleeve and reducing the amount of expensive metal used.

2) An incandescent light bulb that does not require a complicated manufacturing process, can be formed through a simple manufacturing process, and can eliminate the occurrence of paris.

3) An incandescent light bulb that has multiple contact points between the sleeve and the outer periphery of the support wire, and can obtain stable welding strength even when the wire is in contact.

[Failure to solve the problem]

According to the present invention, in an incandescent light bulb, a filament, a sleeve fitted to both ends of the filament, and a support conductor connected to the filament through the sleeve are sealed in the bulb of the light bulb. An incandescent light bulb is obtained, wherein the sleeve has a coil-like structure, and the supporting conductor wire is brought into contact with a plurality of adjacent coils of the coil-like structure.

〔Example〕

An embodiment of the present invention will be described with reference to the drawings.

As shown in Figure 1, ■ is a tungsten spiral filament for incandescent light bulbs, and the end 2 of filament 1 is
A molybdenum sleeve 3 having a coiled structure is fitted into the sleeve 3 . The coil structure of the sleeve 3 is a normal one.
For example, it can be easily obtained by winding a thick molybdenum wire at a desired coil winding pitch. Reference numeral 4 denotes a support conductor made of molybdenum, and the support conductor 4 is also a lead wire to an external power source. In addition, in the automobile ball, the support conductor 4 also supports the shield. The above-mentioned sleeve 3 and support conductor 4
Welding is performed in a state where the winding direction of the coil of the sleeve 3 and the axial direction of the supporting conductor wire 4 intersect.

In the case of such welding, as shown in FIG. 2, the diameter φ=0.
End 2 of filament 1 of 18++on and inner diameter φ=0
．． In order to weld between the sleeve 3 of 25 mm and outer diameter φ = 0.45 mm and between the sleeve 3 and the supporting conductor 4, the end 2 of the filament 1 is inserted into the sleeve 3 in advance. , the filament 1 is placed between the welding rods 5 and 6 of the welding machine.
The sleeve 3 into which the end portion 2 of the supporting wire 4 is inserted is positioned.

Next, as shown in FIG. 3, the sleeve 3 into which the end 2 of the filament 1 is inserted and the support wire 4 are pinched between the welding rods 5 and 6, and arc welding or the like is performed.

Therefore, as shown in FIG. 4, the sleeve 3 is crushed and has a flat cross section, increasing the area of contact with the support conductor 4 and achieving good electrical conductivity. In addition, the solid-colored part 7 in the figure shows the part where the sleeve 3 is welded and melted.

Furthermore, since the sleeve 3 has a coil structure, the support conductor 4 can be sandwiched between adjacent cotton wires to provide a plurality of contact points.

In addition, the dimensions of the sleeve 3 having a coiled structure made of molybdenum in this embodiment are as follows: inner diameter φ = 0.25 tiles, outer diameter φ =
As a result of comparing the weight with a conventional molybdenum metal cylindrical sleeve IJ-b with the same dimensions as 0.45 m and total length t = 3, the weight of the helical wire structure sleeve according to the present invention was 2.65 m.
1n9, and the conventional metal sleeve is 3.36m9.
Met. Therefore, according to the spirally structured sleeve according to the present invention, metal can be reduced by as much as 21.1%.

〔Effect of the invention〕

As described above, according to the present invention, the amount of high sr,'z metal used in the sleeve is reduced by 21.5 mm compared to the conventional cylindrical sleeve.
Since it can be reduced by as much as 1%, product costs can be easily reduced.

In addition, since the support conductor is sandwiched between adjacent coils of the sleeve and a plurality of contact points with the support conductor can be obtained, stable welding with a larger weld area than before can be achieved.

Moreover, the coiled structure of the sleeve can be easily obtained by simply winding a regular wire in its original shape, so there is no need for complicated processes like in the past, and the sleeve does not generate any cracks. can be obtained.

[Brief explanation of drawings]

FIG. 1 is a cutaway perspective view of an embodiment of an incandescent light bulb according to the present invention, FIG. 2 is a cross-sectional view of an embodiment of the incandescent light bulb before welding, and FIG. 3 is a perspective view of an incandescent light bulb according to the present invention. 4 is an enlarged sectional view of a welded part in an embodiment of the present invention, FIG. 5 is a cutaway perspective view of a conventional incandescent light bulb, and FIG. 6 is a cross-sectional view of a conventional incandescent light bulb after welding. FIG. 2 is a cross-sectional view of an incandescent light bulb. 1... Filament, 2... End of filament,
3... Sleeve with coiled structure, 4... Support conductor,
5゜6... Welding rod, 7... Melted part of the sleeve. Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] 1) In an incandescent light bulb in which a filament, a sleeve fitted to both ends of the filament, and a supporting conductor wire coupled to the filament via the sleeve are sealed inside the bulb of the light bulb, the shape of the sleeve An incandescent light bulb, characterized in that the supporting conductor wire is in contact with a plurality of adjacent coils of the coiled structure.