JPH0719585B2 - Incandescent light bulb - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an incandescent light bulb, and more particularly to an incandescent light bulb having a getter in the vicinity of a filament and having excellent vibration resistance.

2. Description of the Related Art Conventionally, incandescent light bulbs have been used for various purposes such as automobile headlights and measuring instruments, and usually adsorb impure gas emitted from glass bulbs, filaments enclosed in the glass bulbs, lead wires, etc. A getter is provided in place within the glass bulb for the purpose of doing so.

Such a getter is desired to be easily disassembled or not peeled in order to achieve a good getter action, and is more strongly desired especially for automobiles to which various forms of vibration are applied.

By the way, in order to expect a good getter action, it is preferable to provide the getter in the vicinity of the temperature rising portion in the valve. In this regard, the manufacturing method disclosed in Japanese Patent Publication No. 47-29276 or Japanese Patent Publication No. 48-12150 is disclosed. Is known from the incandescent lamp shown in FIG.

That is, the former is a step of depositing a metal getter material powder on at least one filament proximity portion of an introduction wire and an anchor for supporting the filament by an electrophoretic method, and then connecting the filament to the introduction wire and the anchor. The method for producing an incandescent light bulb is characterized by including the step of, and, of course, the incandescent light bulb produced by such a method has a getter in the vicinity of the filament which is the temperature raising portion.

The latter is, as shown in FIG. 3, a lead-in wire 4 which is enclosed in a glass bulb 2 and which connects and supports the filament 3.
5 and / or an incandescent bulb 1 characterized in that a mixture 7 of metal getter material powder and silicone varnish is applied to the adjacent portions 4a, 5a, 6a of the filament 3 of the anchor 6.

Therefore, in both of the above proposals, a good getter action can be expected based on the temperature rise in the proximity portion due to lighting of the light bulb.

In addition, the getter lead-in wire and the adhesion to the anchor are performed by using an electrophoresis method or a silicone varnish, so that they are not easily peeled off or decomposed, that is, the strength of the adhesion is strengthened. It is possible to prevent the above decomposition and the like even in a non-base type incandescent light bulb to which a high temperature is applied at the time of hermetically sealing.

On the other hand, as an incandescent light bulb intended to improve vibration resistance, an earthquake-resistant light bulb disclosed in Japanese Utility Model Laid-Open No. 64-55661 is known.

As shown in FIG. 4, this light bulb is characterized in that a reinforcing member 10 is integrally attached to supports 8 and 9 to which the filament 3 is connected.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention As described above, the incandescent light bulb that makes the getter perform a good getter action and the incandescent light bulb in consideration of the vibration resistance characteristic are known, but both are independent and are good. Both the getter action and the vibration resistance are not taken into consideration, and therefore, the following inconvenience still exists, and its improvement is desired.

That is, the two proposals described above are uncertain in terms of resistance to various vibration forms such as filament disconnection or shape change when considering use for automobiles,
In addition, even considering the disclosure content of the proposal described later, it is necessary to prepare the reinforcing member, which causes a problem that the cost of the incandescent lamp increases.

The present invention has been made in consideration of the above disadvantages,
An object of the present invention is to provide a low-cost incandescent light bulb having a getter in the vicinity of the filament and having excellent vibration resistance.

Means for Solving the Problems An incandescent light bulb according to the present invention forms a corrugated portion in the filament proximity portion of at least one of an anchor or a lead wire that supports a filament connected between lead wires in a glass bulb. In addition, the getter is applied to an appropriate region including at least a part of the corrugated portion.

Effect Since the incandescent lamp according to the present invention is provided with the getter in the vicinity of the filament and in the curved corrugated portion that is not the straight portion formed in the anchor or the introduction line, the getter is more firmly attached to the anchor or the introduction line. Further, since the corrugated portion is formed on the anchor or the lead-in wire, the vibration absorbing action can be obtained by the corrugated portion.

Therefore, resistance to various forms of vibration can be increased without using other members such as a reinforcing member.

Example Hereinafter, an example of the incandescent light bulb of the present invention will be described.

[Embodiment 1] FIG. 1 is a front view showing an incandescent light bulb according to a first embodiment of the present invention, in which the same reference numerals as those in FIGS. 3 and 4 indicate the same functional members. .

As is clear from FIG. 1, this first embodiment is an anchor 6 for supporting the filament 3 connected to the introduction lines 4 and 5.
The corrugated portion 11 is formed in the portion close to the filament 3, and the getter 12 is applied to the corrugated portion 11.

Therefore, the getter action by the getter 12 is extremely good because the getter 12 is applied to the corrugated portion 11 located in the vicinity of the filament 3, and the adherence strength of the getter 12 is also excellent. Since the shape part 11 is not a straight part, it becomes stronger and the getter 12 does not easily come off.

Further, since the corrugated portion 11 formed on the anchor 6 has a vibration absorbing action, for example, even when various forms of vibration are applied, the vibration is absorbed to some extent by the corrugated portion 11, As a result, the filament 3 is not easily broken or deformed, and the vibration resistance characteristic of the first embodiment is excellent.

That is, according to the measurement experiment of the displacement characteristic of the filament with respect to the vibration application of various frequencies by the inventors of the present application,
It was confirmed that the displacement characteristics of the first embodiment had a displacement width reduced in all measured frequency ranges as compared with that of an incandescent light bulb of a normal shape having no corrugated portion.

This suggests that it is particularly effective when considered as a light source for automobiles in which performance deterioration due to resonance action due to vibration application is considered to be a problem. From this point as well, the first embodiment is It is extremely practical.

In the illustrated example, the application area of the getter 12 is the entire area of the corrugated portion 11. However, for example, the application area may be a portion of the corrugated portion 11 or a region other than the corrugated portion 11, that is, the getter 12 is formed. Needless to say, the application area may be any suitable area including at least a part of the corrugated portion 11.

Further, in the illustrated example, the corrugated portion 11 is formed in the left-right direction in the drawing, but it is needless to say that the corrugated portion 11 can be formed in an appropriate direction such as the front-rear direction in the drawing.

[Embodiment 2] FIG. 2 is a front view showing an incandescent light bulb according to a second embodiment of the present invention. In the figure, those having the same reference numbers as those in FIG. 1 show the same functional members.

As is clear from FIG. 2, in the second embodiment, the corrugated portion 13 is formed in the portion of the lead-in wires 4 and 5 to which the filament 3 is connected, close to the filament 3, and the corrugated portion 13 is further formed. Getter 14 is applied to 13.

Therefore, the getter action by the getter 14 is extremely good as in the first embodiment, because the getter 14 is applied to the corrugated portion 13 located in the vicinity of the filament 3, and the adhesion strength thereof is also high. Since the getter 14 is applied to the corrugated portion 13 that is not the straight portion, the getter 14 becomes stronger as in the first embodiment.

Furthermore, the corrugated portion 13 formed on the introduction lines 4 and 5 is the first
It goes without saying that the corrugated portion 11 formed in the anchor 6 of the embodiment also has a vibration absorbing action, and therefore its vibration resistance characteristic is also excellent as in the first embodiment.

That is, the displacement characteristic of the filament with respect to the vibration application in the second embodiment also shows the characteristic that the displacement width is reduced as compared with the incandescent light bulb of the normal shape, as in the first embodiment, and thus the second embodiment is also performed. It is extremely practical and is particularly effective as a light source for automobiles.

As for the coating area of the getter 14 and the forming direction of the corrugated portion 13, at least the corrugated portion 13 is formed as in the first embodiment.
It goes without saying that it can be applied to an appropriate region including a part of the above, and can be formed in an appropriate direction.

Although the first and second embodiments of the incandescent lamp according to the present invention have been described above, it is needless to say that the combination of the first and second embodiments can be considered as the incandescent lamp according to the present invention.

That is, although not shown, an incandescent light bulb in which a corrugated portion is formed in the filament proximity portion of both the anchor or the lead wire and a getter is applied to at least one of the both is also conceivable. It is possible to expect the same operation and effect as those of the first and second embodiments.

The incandescent light bulb according to the present invention has a corrugated portion formed on at least one of the anchor and the lead wire in the vicinity of the filament,
Moreover, since the getter is applied to the corrugated portion, a good getter action can be expected and the getter's adhesive strength can be strengthened.

In addition, since the vibration absorbing action of the corrugated portion can be expected, there is also an effect that the vibration resistance characteristic can be made excellent without using another member such as a reinforcing member.

That is, since the displacement width of the filament when vibration is applied can be reduced by the above-mentioned configuration, it also has an effect of being particularly effective as a light source for automobiles.

[Brief description of drawings]

1 is a front view showing a first embodiment of an incandescent light bulb according to the present invention, FIG. 2 is a front view showing a second embodiment of an incandescent light bulb according to the present invention, and FIG. 3 is disclosed in Japanese Patent Publication No. 48-12150. FIG. 4 is a front view showing the disclosed incandescent light bulb, and FIG. 4 is a front view showing the earthquake-resistant light bulb disclosed in Japanese Utility Model Laid-Open No. 64-55661. 2 ... Glass bulb, 3 ... Filament, 4, 5 ...
Introductory line, 6 ... Anchor, 11,13 ... Corrugated part, 12,14 ...
… Getter

Claims (1)

[Claims] 1. A corrugated portion is formed in the filament proximity portion of at least one of an anchor or a lead wire that supports a filament connected between lead wires in a glass bulb, and at least one of the corrugated portions is formed. An incandescent light bulb with a getter applied to appropriate areas including parts.