JPS5931968B2 - Manufacturing method of discharge lamp ballast - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a discharge lamp ballast.

Conventionally, a discharge lamp ballast has a capacitor 2 inside a case 1.
The format shown in Fig. 5 is adopted, in which the capacitor 2 and transformer 3 are fitted, and the positions of the capacitor 2 and transformer 3 are fixed inside the case 1 with a filler (compound) 5. The case 1 was manufactured using a manufacturing method in which the side where the transformer 3 of the case 1 was fitted was placed on the upper side, and the fluid filling material 5 was poured in from the upper end and solidified. The filling material 5 needs to be filled in such a way that it completely embeds both the capacitor 2 and the transformer 3, which necessitates the use of an end plate 6, which increases the amount of the filling material 5 used and reduces the heat dissipation of the capacitor 2. There were drawbacks such as poor performance and a large temperature rise.

This invention eliminates the above-mentioned drawbacks in the conventional manufacturing method of a discharge lamp ballast, eliminates the use of the end plate 6 in the case 1, reduces the amount of filler 5 required, and improves the heat dissipation of the capacitor 2. The object of the present invention is to provide a method for inexpensively manufacturing a discharge lamp ballast that reduces temperature rise.

To explain the method of the present invention with reference to the embodiment shown in the drawings, as shown in FIG. , an elastic bushing 4 made of an elastic material such as synthetic rubber or synthetic resin, which is an annular body with a constant thickness, is fitted horizontally, or a metal plate or synthetic resin plate is used as shown in Fig. 2. , or a cardboard board or the like which itself does not have elasticity, but is formed into an annular body with a "U"-shaped cross section, and an elastic bushing 4 formed into a shape that can exert elasticity on both the inside and outside sides is fitted laterally. After removing the capacitor 2 and the transformer 3 inside the cylindrical case 1, the outer surface of the elastic bushing 4 is elastically crimped to the inner surface of the case 1, and the position of the capacitor 2 is fixed. In the same way as in the method described above, with the side where the transformer 3 is attached facing upward, the fluid filling material 5 is poured from the upper end, and the filling material 5 is filled from the position of the elastic bushing 4 to the position where the transformer 3 is buried. It is used to solidify and manufacture discharge lamp ballasts.

According to the method of the present invention, the case 1 can be filled with the filler 5 without using the end plate 6 in manufacturing the discharge lamp ballast, as shown in FIGS. 1 and 2. The volume is reduced and about half of the capacitor 2 is exposed to the air, and it is fixed inside the case 1 by the elastic bushing 4 and the filler 5, so the use of the end plate 6 in the case 1 becomes unnecessary and the filling This has the effect of reducing the required amount of material 5, reducing the number of manufacturing steps, and making it possible to manufacture a discharge lamp ballast with high durability and low temperature rise at low cost.

[Brief explanation of drawings]

Figures 1 and 2 are longitudinal cross-sectional views showing embodiments of the present invention. Figure 1 shows a case in which an elastic bushing is used in which the material itself has elasticity, and Figure 2 shows an elastic bushing in which the material itself has elasticity. The case where a molded elastic bushing is used is shown.

Claims (1)

[Claims] 1. A capacitor 2 with required electrical connections and a transformer 3 are placed inside a cylindrical case 1 of a fixed length with both ends open, and an elastic bushing 4 is fitted around the outer periphery of the center of the capacitor 2. The outer surface of the elastic bushing 4 is pressed against the inner surface of the case 1 and fitted, and the transformer 3 is placed on the upper side, and the fluidized filler 5 is flowed in from the upper end of the case 1 and solidified to form the elastic bushing 4. Filling material 5 is filled from the position to the position where the transformer 3 is buried,
A method of manufacturing a discharge lamp ballast. 2. The discharge lamp ballast according to claim 1, wherein the elastic bushing 4 is made of an elastic material such as rubber, synthetic rubber, or synthetic resin and molded into a ring shape with a constant thickness. manufacturing method. 3. Claim 1 is characterized in that the elastic bushing 4 is made of a thin metal plate, a synthetic resin plate, a cardboard plate, or the like formed into an elastic annular body having a U-shaped cross section. A method of manufacturing a discharge lamp ballast.