JPS607055A - Bulb with hanger - 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 (al) Technical Field of the Invention The present invention relates to a light bulb with a hanger, and in particular to an improvement that prevents the mutual positional relationship between the hanger supporting the filament and the lead-in wire from being distorted during sealing. The present invention relates to the structure of a light bulb with a hanger.

(bl) Prior Art and Problems When sealing small light bulbs that are often used for displays such as keyboards, a sealing method called the vacuum furnace method is generally used. In other words, as shown in Figure 1, Mount completed product 1 and bulb 2 are assembled on a predetermined jig (not shown), and the jig is directly or indirectly heated in a vacuum furnace to soften the glass beads 3 and seal them with bulb 2. wear.

In this sealing method, the entire glass beads 3 are heated and softened, so the tension of the filament 4 causes the hanger 5 and the lead-in wire 6 to
There is a disadvantage that the positional relationship between the filaments 4 and 4 is shifted, resulting in deformation of the filament 4. Due to these difficulties, it is difficult to manufacture small light bulbs with hangers using the vacuum furnace method, and small light bulbs without hangers are manufactured.

On the other hand, in order to manufacture a small light bulb with a hanger, for example, as shown in Fig. 2, the completed mount 1 is inserted into a valve 7 which also serves as an exhaust pipe, and the air is evacuated as shown in Fig. 3. After creating the intermediate product, a manufacturing method is used in which the intermediate product is sealed in the atmosphere with a gas burner 8 as shown in FIG. 4, and then the valve 7 is cut off as shown in FIG. 5 to obtain the finished product. ing.

This method has a narrow tolerance range for temperature and time in the sealing process using the gas burner 8 shown in FIG. On the other hand, there is a drawback that leakage occurs if heating is insufficient, and it cannot be said that it is necessarily easy to manage the manufacturing process.

(C1 Purpose of the Invention The present invention was made to solve the above-mentioned difficulties,
To provide an improved structure of a light bulb with a hanger, in which the positional relationship between the hanger and the lead-in wire is not disturbed even if the glass beads are softened.

(dl Structure of the Invention The present invention is characterized in that a fixed layer made of an insulating material having a melting point higher than the melting point of the glass beads is formed on the upper surface of the glass beads that support the hanger and lead-in wire, and the fixed layer The mutual positional relationship between the hanger and the lead-in wire is maintained.

tel Embodiment of the Invention An embodiment of the light bulb with a hanger according to the present invention will be described below along with its manufacturing process with reference to sectional views of main parts in FIGS. 6 to 8.

First, after creating the completed mount product 1 shown in FIG. , 503 (USA ΔRMECOPR
Apply heat-resistant adhesive (manufactured by ODUCTS, ING, Inc.),
Heating is carried out in the atmosphere at about 100° C. for about 10 minutes. By doing this, the heat-resistant adhesive covers the glass beads 3 and hardens, and the suspenders 5 and lead-in wires 6 are heated. A fixed layer 11 is formed that maintains the mutual positional relationship.

In this way, a finished product 1'' of 7° in this example is obtained.

The subsequent steps may be carried out according to the usual vacuum furnace manufacturing process. That is, as shown in FIG. 7, the completed mount product 1'' and the valve 2 are assembled on a predetermined jig (not shown), and this is placed in a vacuum furnace (not shown) and heated to a predetermined temperature. do. Due to this heating, the glass beads 3 are softened and welded to the bulb 2, and sealing is performed.
Since the melting point of the glass beads 1 is higher than that of the glass beads 3, the heating temperature is selected to be higher than that of the glass beads 3 and lower than the melting point of the fixed layer 11, so that the fixed layer 11 is not softened. Therefore, during the entire period of the sealing process, this fixed layer 1
1, the hanger 5 and the lead-in wire 6 are held, and their mutual positional relationship is maintained correctly. In this way, the finished product of this example shown in FIG. 8 was obtained.

As described above, in this embodiment, the fixing layer 11 made of an insulating material having a higher melting point than the glass beads 3 is provided to maintain the mutual positional relationship of the hanger 4 and the lead-in wire 6, so that the vacuum furnace method can be used. I was able to make a light bulb with a hanger.

The present invention is not limited to the case where sealing is performed by the vacuum furnace method shown in the above-mentioned embodiment, and the
It is also effective when sealing is performed by heating with the gas burner shown in the figure.

That is, even in this case, since the fixed layer 11 does not soften, it becomes possible to heat it sufficiently, and the permissible range of heating temperature and heating time is expanded. Therefore, it is possible to prevent leakage from occurring in the sealing portion.

(fl As described in detail, according to the present invention, even if the glass beads soften, the mutual positional relationship between the hanger and the lead-in wire will not be disturbed,
Therefore, it becomes easy to manufacture a light bulb with a hanger, and the quality is improved.

[Brief explanation of drawings]

Figures 1 and 2 to 5 are cross-sectional views of main parts to explain the drawbacks of conventional light bulbs with hangers, and Figures 6 to 8 show an embodiment of the present invention along with its manufacturing process. It is a sectional view of the main part. In the figure, 1. 1'' is a completed mount product, 2 and 7 are bulbs, 3 is glass beads, 4 is a filament, 5 is a hanger, 6 is an introduction wire, and 11 is a fixed layer.

Claims (1)

[Claims] A fixing layer made of an insulating material having a melting point higher than the melting point of the glass beads is formed on the upper surface of the glass beads that support the hanger and the lead-in wire, and the fixed layer controls the mutual positional relationship of the hanger and the lead-in wire. A light bulb with a hanger, characterized by being held.