JPS5844530Y2 - incandescent light bulb - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an incandescent light bulb, particularly an incandescent light bulb with two filament coils and used as a headlamp in a car.

Conventionally, this type of incandescent light bulb, as shown in Fig. 1A-C,
Two filament coils 2 and 3 are arranged in a one-end-sealed glass enclosure 1 in parallel with each other and displaced in the axial direction so that the portions including one end of each filament coil overlap each other in the front direction. At the same time, a lead portion 2 is formed axially outward from both ends of each of these filament coils 2 and 3.
A, 2B and 3A, 3B are pulled out, and a total of four glue supports 5A, 5B and 6A, 6B are fixedly provided through the sealing part 4 of the enclosure 1. As shown, the folded holding parts 5A', 5B' and 6A'
, 6 B' are formed and positioned axially outward of each of the filament coils 2 and 3, and these folded holding parts 5 A', 5 B' and 6 A', 6 B' form corresponding lead parts. 2A, 2B and 3A, 3B are connected by holding them under pressure or by spot welding.

However, the incandescent light bulb with such a configuration has the following drawbacks.

That is, this type of incandescent light bulb is mainly used as a headlamp of a car, and the two filament coils 2 and 3 have different power consumption, and the shape of the filament coil varies depending on the type of car and other factors. related matters, namely the coil length and coil diameter of each of filament coils 2 and 3, and both filament coils 2
, 3 are required to have different intervals, displacements, or overlapping degrees, etc., but in conventional incandescent light bulbs, the folded holding parts 5A', 5B' of each lead supporter 5A, 5B and 6A, 6B are required to be different. Also, the range in which the positions in which the lead parts 2A, 2B, and 3A, 3B of the filament coils 2 and 3 at 6 A' and 6 B' should be connected is extremely narrow, and therefore the matters regarding the form of the filament coils 2 and 3 are When changing one of the lead supports 5A, 5B and 6A, 6B, the position and shape of the lead supports 5A, 5B and 6A, 6B in the sealing part 4, for example, the size of the bending angle at point P shown in the first diagram, etc., must be changed accordingly. As a result, mass production is difficult and costs are high.
Alternatively, it is not possible to arrange the filament coils 2 and 3 in the desired form, and in the past, one end of each filament coil 2 and 3 was connected to the ground terminal, so the lead portion located in the center 2A and 3A are connected to a common lead supporter; in this case, the second
As shown in the figure, for example, the lead supporter 3A is provided by welding the lead supporter 2A in a branched state at the connection part W or by connecting it with silver solder to the lead supporter 2A without penetrating the sealing part 4.

However, in such a configuration, the above-mentioned drawbacks become more obvious, and it takes a lot of effort to manufacture a common lead supporter, and the connection part W easily comes off, and when the connection is made with silver solder, the bulb in question When a halogen incandescent lamp is used, impure gases are generated from the silver solder, inhibiting the normal halogen cycle, and causing problems such as blackening of the envelope 1.

Furthermore, in the conventional incandescent light bulb, the folded holding parts 5A' and 6A' at the tips of the lead supports 5A and 6A are located very close to the front of the filament coil 2 and the back of the filament coil 3, respectively. When the lamp is turned on, the folded holding parts 5A' and 6A' are extremely heated and reach a high temperature of, for example, 1400°C.
Impure gas is generated from the folded holding parts 5A' and 6A' of these lead supports, which are usually made of molybdenum or the like, and as a result, when the bulb is made into a halogen incandescent bulb, this impure gas inhibits the normal halogen cycle. blackening of the envelope 1 or filament coils 2 and 3
There is also the disadvantage that early wire breakage occurs, resulting in a short service life.

The present invention eliminates the above-mentioned drawbacks and has a lead supporter to which the lead parts from each end of two filament coils are connected in common, but it has a large degree of freedom regarding the shape of the filament coil, and the shape of the filament coil is large. When a change is required, it can be met very easily, so that the desired performance can always be achieved, and the lead supporter does not heat up excessively, so when using a halogen incandescent lamp. The purpose of the present invention is to provide an incandescent light bulb that undergoes a normal halogen cycle and has a long service life.

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

In the present invention, as shown in FIGS. 3A to 3C, both end lead parts 2A and 2B of the filament coil 2 and both end lead parts 3A and 3B of the filament coil 3 are drawn out in the same direction, Meanwhile, as shown in FIG. 4, a central lead supporter 7 is formed.

That is, by bending one linear supporter wire, a bent portion 7B is formed at the tip of the linear main body portion 7A by bending the main body portion 7A at right angles, and the main body portion including the bent portion 7B is formed. A first folded portion 7C is folded back at the tip of the bent portion 7B so as to overlap the bent portion 7B in a plane perpendicular to the bent portion 7A, and extends beyond the main body portion 7A; A first folded portion 7D is made up of a second folded portion 7D which is folded back at the tip of the first folded portion so as to overlap with the folded portion 7C, and a first folded portion 7D is composed of the bent portion 7B and the first folded portion 7C.
A second folded holding part 8B composed of a folded holding part 8A, and a first folded part 7C and a second folded part 7D.
A central lead supporter 7 having a central lead supporter 7 is formed.

Here, the second folded portion 7D is located on the same side as the bent portion 7B in the example 4A with respect to the first folded portion 7C, but as shown in FIG. 4B, the second folded portion 7D is located on the opposite side to the bent portion 7B. It can also be located at

Also, as shown in FIG. 5, side lead supports 9 are formed.

That is, by bending one linear supporter wire, a bent portion 9B is formed at the tip of the linear main body portion 9A by bending the main body portion 9A at right angles, and the main body portion including the bent portion 9B is formed. A side comprising a folded portion 9C folded back at the tip of the bent portion so as to overlap the bent portion 9B in a plane perpendicular to the bent portion 9A, and has a folded holding portion 10 constituted by the bent portion 9B and the folded portion 9C. The side lead supporter 9 is formed, and the other side lead supporter 12 having a folded holding portion 11 is formed with exactly the same structure.

The main body portion 7A of the central lead supporter 7 and the main body portions 9A and 12A of both side lead supports 9 and 12 are used as support portions, and this support portion is used as the sealing portion 4 of the sealing body 1.
The first folded holding part 8A and the second folded holding part 8B of the central lead supporter 7 are buried and fixed in such a way that they are parallel to each other.
The lead parts 2A and 3A from one end of each of the filament coils 2 and 3, and the lead supports 9 and 12 on both sides.
The lead parts 2B and 3B from the other ends of the filament coils 2 and 3 are held by the folded holding parts 10 and 11 in a state where the lead parts 2A, 2B and 3A, 3B are perpendicular to the associated holding part. , or further connect by spot welding.

Since the incandescent light bulb of the present invention has the above configuration, the central lead supporter 7 has the lead parts 2A and 3A from one end of each of the filament coils 2 and 3 connected in common, but the main body part 7A is By rotating it, the positions of the first folded holding part 8A and the second folded holding part 8B can be changed within the same plane perpendicular to the main body part 7A, and the positions of the folded holding parts 8A and 8 can be changed.
The corresponding lead portions 2A and 3A can be held and connected in a desired manner at any position within the range of the lengths LA and LB of B.

Similarly, by rotating the main body portions 9A and 12A of both side lead supports 9 and 12, the positions of the respective folded holding portions 10 and 11 can be changed within the same plane perpendicular to the main body portions 9A and 12A. , and those folded holding parts 10 and 1
1 length.

The corresponding lead parts 2B and 3B can be held and connected in a desired manner at any position within the range of .

Therefore, even if the coil length or coil diameter of each of the filament coils 2 and 3 changes, or if the spacing, displacement, or degree of overlap between both filament coils 2 and 3 should be changed, the filament that changes accordingly Lead parts 2A, 2B and 3A, 3 of coils 2 and 3
Folded holding part 8 to which they should be connected corresponding to the position of B
A, 9.8B, 12 can be positioned and a good connection can be achieved.

and ficimen 1 - lead parts 2A of coils 2 and 3,
Since 2B, 3A, and 3B are perpendicular to the associated folded holding portions, the filament coils 2 and 3 will not be tilted.

That is, according to the present invention, the degree of freedom regarding the shape of the two filament coils 2 and 3 is greatly increased, and it is easy and certain that the shape of each of the filament coils 2 and 3 and the overall shape can be appropriately accommodated. It is possible to provide an incandescent light bulb that always has the desired performance.

Moreover, as a result of the above, it is possible to always keep the respective positions of the lead supports 7, 9, and 12 constant in the sealing part 4 of the sealing body 1, and therefore, it is possible to standardize the form of the sealing part 4. It is suitable for mass production, reduces costs, and is convenient to use.

In addition, in the present invention, the central lead supporter 7 has the lead parts 2A and 3A at each end of the filament coils 2 and 3 connected in common, and because it is continuous and integral, great strength can be obtained. At the same time, by pulling out the lead parts 2A, 2B and 3A, 3B of the filament coils 2 and 3 in the same direction, the lead supports 7.
9.12 is avoided from being placed close to the front of the filament coil 2 or the back of the filament coil 3, thus preventing the lead supporter 7.9.12 from being extremely heated and causing the risk of impurity gas generation. Since there is no need to connect the central lead supporter 7 with silver solder, when the bulb is used as a halogen incandescent bulb, a normal halogen cycle will occur, causing blackening of the envelope 1 or blackening of the filament coil 2.3. There is no possibility of premature wire breakage, and the wire has a long service life.

The lead portions 2A, 2B or 3A, 3B drawn out in the same direction from both ends of the filament coil 2 or 3 extend in the normal direction from the circumference of the coil having a circular cross section as shown in FIG. 6A. It is best to extend tangentially from the circumference of a coil with a circular cross section as shown in B, or in the normal direction from the circumference of a coil with an oblong cross section as shown in FIG. 6C.

As described above, the incandescent light bulb of the present invention has an extremely simple structure, and although it has two filament coils, it has a large degree of freedom in arranging them, and it is easy to always arrange the filament coils in the desired state. It can ensure the desired performance, it is easy to manufacture and suitable for mass production, which reduces costs, and it also avoids excessive heating of the lead supporter, resulting in a long service life. You can get big benefits such as having

[Brief explanation of drawings]

Figures 1A-C are an explanatory cross-sectional plan view, longitudinal front view, and longitudinal side view of a conventional incandescent light bulb, the first figure is an explanatory diagram of its lead supporter, and the second figure is an explanatory diagram of the lead supporter of a conventional white light bulb. The explanatory drawings and FIGS. 3A to 3C are respectively an explanatory cross-sectional plan view, a vertical front view, and a longitudinal side view of the incandescent light bulb of the present invention, and FIGS. 4A and B are respective illustrations of the main parts of the central lead supporter used in the present invention. FIG. 5 is a perspective view of a main part of a side lead supporter used in the present invention, and FIGS. 6A to 6C are perspective views each showing the shape of a filament coil suitably used in the present invention. 1... Sealing body, 2, 3... Filament coil, 2A, 2B, 3A, 3B... Lead part, 4... Sealing part, 5A , 5B, 6A, 6B...
...Lead supporter, 5 A', 5 B', 6A'
, 6 B', 8 A, 8 B, 10.11...
・Folding holding part, 7...Central lead supporter,
9.12... Lateral lead supporter, 7 A, 9
A, 12 A...Body part, 7B, 9B. 12B...Bent part, 7C, 7D, 9C,
12C...Folded part.

Claims (1)

[Scope of utility model registration request] An enclosure having a sealing portion, two filament coils disposed within the enclosure, a central lead supporter to which lead portions pulled out from one end of each of these filament coils are commonly connected, and the filament coils are connected together. The lead parts pulled out from the other end of each are connected to each other,
The central lead supporter has a linear support part embedded and fixed in the sealing part of the sealing body, and has a linear support part embedded and fixed in the sealing part of the sealing body, and has a straight support part fixed to the sealing part of the sealing body. , each having two lead connection parts formed by bending a continuous wire so as to be perpendicular to the support part, and these two lead connection parts,
An incandescent light bulb, characterized in that a total of two lead parts drawn out from one end of each of the filament coils are connected in a state perpendicular to the lead part connection part.