JPH0398254A - Incandescent lamp - Google Patents

Abstract

PURPOSE:To provide an incandescent lamp excellent in anti-vibration characteristics with low cost by a method wherein a waveform part is formed in the vicinity of a filament of an anchor and at least one of lead wires while getter is applied on the waveform part. CONSTITUTION:A waveform part 11 is formed adjacent to a filament 3 of an anchor 6 supporting the filament 3 to be connected to lead wires 4, 5 while getter 12 is applied to the waveform part 11. Therefore gettering of the getter 12 is extremely good since the getter 12 is applied to the waveform part 11 positioned adjacent to the filament 3 and since the waveform part 11 to which the getter 12 is to be applied is not a straight section, adhesion strength is so strong that the getter 12 cannot easily be peeled off.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an incandescent light bulb, and more particularly to an incandescent light bulb that includes a getter in the vicinity of a filament and has excellent vibration resistance.

Conventional technology Incandescent light bulbs have traditionally been used in various applications such as automobile headlights and meters, and they usually absorb impurity gases emitted from glass bulbs, filaments sealed inside the glass bulbs, lead-in wires, etc. A getter is located at a suitable location within the glass bulb for the purpose of 1.

It is desirable that such a getter not be easily decomposed or peeled off in order to achieve good getter action, and it is particularly desirable for use in automobiles where various forms of vibration are applied.

By the way, in order to expect a good getter effect, it is preferable to provide the getter near the temperature rising part in the bulb, and in this regard, the manufacturing method shown in Japanese Patent Publication No. 47-29276 or the method shown in Japanese Patent Publication No. 4812150 is recommended. It is well known from the incandescent light bulb.

That is, the former method involves the step of electrophoretically depositing a metal getter material powder near the filament on at least one of the vertical line, supporting lead-in line, and anchor, and then attaching the filament to the vertical line and the supporting lead-in line and the anchor. Disclosed is a method for manufacturing an incandescent light bulb, which is characterized by comprising the steps of: Of course, an incandescent light bulb manufactured by this method has a getter near the filament, which is the temperature rising part.

As shown in FIG. 3, the latter is enclosed in the glass bulb 2 and includes a vertical line 4 that supports the filament 3;
An incandescent light bulb 1 is disclosed, characterized in that a mixture 7 of metal getter material powder and silicone varnish is applied to the adjacent portions 4a, 5as 5a of the filament 3 of the anchor 6 and/or the anchor 6.

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

In addition, the getter is adhered to the lead-in wire and anchor using electrophoresis or silicone varnish, so it does not peel off or decompose easily, which means that the strength of the above-mentioned adhesion is strong. For example, even in a capless type incandescent light bulb to which high temperature is applied during hermetically sealing, the above-mentioned decomposition etc. can be prevented.

On the other hand, as an incandescent light bulb whose vibration resistance has been improved, an earthquake-resistant light bulb disclosed in Japanese Utility Model Application Laid-Open No. 64-55661 is known.

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

Problems to be Solved by the Invention As mentioned above, incandescent light bulbs in which the getter performs a good getter action and incandescent light bulbs in which vibration resistance characteristics are taken into consideration are known. Both the getter action and the anti-vibration characteristics are not taken into consideration, and therefore the following disadvantages still exist, and improvement thereof is desired.

In other words, the two proposals mentioned above have concerns about their resistance to various forms of vibration, such as filament breakage or shape changes, when considering use in automobiles.
Further, even if the disclosed contents of the proposal mentioned later are taken into consideration, it is necessary to prepare a reinforcing member, resulting in an inconvenience that the cost of the incandescent light bulb increases.

The present invention was made in consideration of the above-mentioned disadvantages, and an object of the present invention is to provide a low-cost incandescent light bulb that has a getter in the vicinity of the filament and has excellent vibration characteristics.

Means for Solving the Problems The incandescent light bulb according to the present invention includes a corrugated portion formed in the vicinity of the filament of at least one of the anchor supporting the filament vertically drawn between the lead-in wires in the glass bulb or the lead-in wires. At the same time, it is constructed by applying getter to an appropriate region including at least a portion of the wave-shaped portion.

Function: In the incandescent light bulb according to the present invention, the getter is provided in the vicinity of the filament, and not in the straight part shaped like the anchor or lead-in wire, but in the curved wave-shaped part, so that the getter is attached more firmly to the anchor or lead-in wire. By forming a wave-shaped portion on the anchor or lead-in wire, this wave-shaped portion can provide a vibration absorption effect.

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

Example Examples of the incandescent light bulb of the present invention will be described below.

[Example 1 Figure 1 is a front view showing the first example of the incandescent light bulb according to the present invention, and in the figure, parts with the same numbers as in Figures 3 and 4 indicate the same functional parts. .

As is clear from FIG.
A corrugated portion 11 is formed in a portion close to the filament 3, and a getter 12 is further applied to this corrugated portion 11.

Therefore, the getter action of 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 adhesion strength is also lower than that of the getter 12. Since the corrugated portion 11 is not a straight portion, it becomes stronger and the getter 1
2 is not easily lost.

Furthermore, since the corrugated portion 11 formed on the anchor 6 has a vibration absorbing effect, for example, even if various forms of vibration are applied, the vibration will be absorbed to some extent by the corrugated portion 11. As a result, the filament 3 does not easily break or deform, and the vibration resistance of the first embodiment is excellent.

That is, according to experiments conducted by the present inventors to measure the displacement characteristics of filaments in response to the application of vibrations at various frequencies.
It was confirmed that the displacement characteristic of the first example has a reduced displacement width in all measured frequency ranges compared to that of a normal-shaped incandescent lamp without a corrugated portion.

This suggests that this is particularly effective when considered as an automobile light source, for example, where performance deterioration due to resonance effect due to the application of vibration is considered a problem, and from this point of view, the first embodiment is Extremely practical.

In the illustrated example, the coating area of the getter 12 is the entire area of the corrugated part 7 l1, but for example, the coating area may be a part of the corrugated part 11 or an area including a part other than the corrugated part 11. It goes without saying that the application area 12 may be any suitable area that includes at least a portion of the corrugated portion l1.

Further, in the illustrated example, the wave-shaped portion 11 is formed in the left-right direction in the drawing, but needless to say, it can be formed in any appropriate direction, such as the front-back direction in the drawing.

[Embodiment 2] Fig. 2 is a front view showing a second embodiment of the incandescent light bulb according to the present invention, and in the figure, the same number as in Fig. 1 indicates the same functional member.

As is clear from FIG. 2, in this second embodiment, a wave-shaped portion 13 is formed in the portions of the lead-in lines 4 and 5 where the filament 3 is vertically drawn, which are close to the filament 3, and The portion 13 is coated with getter l4.

Therefore, the gettering effect of the getter 14 is as follows:
Since the getter 14 is applied to the corrugated portion 13 rather than the straight portion, the adhesion strength is very good as in the first embodiment. As with the example, it will become stronger.

Furthermore, it goes without saying that the wave-shaped portion 13 formed on the lead-in wires 4 and 5 has the same vibration-absorbing effect as the wave-shaped portion 1l formed on the anchor 6 of the first embodiment, and therefore has its durability. The vibration characteristics are also excellent as in the first embodiment.

That is, the displacement characteristics of the filament in response to the application of vibration in this second embodiment also exhibit a characteristic in which the displacement width is reduced compared to that of a normal-shaped incandescent lamp, as in the first embodiment. It is extremely practical and is particularly effective as a light source for automobiles.

As for the application area of the getter 14 and the formation direction of the corrugated portion 13, it goes without saying that the getter 14 can be applied to an appropriate area including at least a part of the corrugated portion 13, and can be formed in an appropriate direction, as in the first embodiment. Nor.

The first and second embodiments of the incandescent light bulb according to the present invention have been described above, but it goes without saying that the incandescent light bulb according to the present invention can also be developed by combining the above-mentioned 11th and 2nd embodiments.

That is, although not shown, an incandescent light bulb may be considered in which a wave-shaped portion is formed near the filament of both the anchor and the lead-in wire, and a getter is applied to at least one of the two, and of course, such an incandescent light bulb is The same actions and effects as in the first and second embodiments can be expected.

Effects of the Invention The incandescent light bulb according to the present invention has a corrugated portion formed near the filament of at least one of the anchor or the lead-in wire,
Moreover, since the structure has a structure in which getter is applied to the corrugated portion, a good getter action can be expected and the adhesive strength of the getter can be strengthened.

Furthermore, since the wave-shaped portion can be expected to have a vibration-absorbing effect 9 10 , it also has the effect of providing excellent vibration resistance without using a separate member such as a reinforcing member.

That is, since the above structure can reduce the displacement width of the filament when vibration is applied, it also has the effect of being particularly effective as a light source for automobiles.

[Brief explanation of drawings]

Fig. 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 a front view showing a second embodiment of an incandescent light bulb according to the present invention. A front view showing an incandescent light bulb disclosed in
5A and 5B each show a front view of an earthquake-resistant light bulb disclosed in Japanese Patent No. 5661. 2... Glass bulb, 3... Filament, 4, 5
...Introduction line, 6...Anchor, ■1, 13...Wave shape part, 12, 14...Getter

Claims (1)

[Claims] A corrugated portion is formed in the vicinity of the filament of at least one of the anchor supporting the filament vertically drawn between the lead-in lines in the glass bulb or the lead-in wire, and an appropriate area including at least a part of the wave-shaped portion. An incandescent light bulb coated with getta.