JP3071216U - Ballast for fluorescent light - Google Patents

Abstract

(57) [Problem] To provide a ballast having a long life and a simple structure with improved durability against moisture and moisture. A ballast (10) having electronic components required for lighting a fluorescent lamp incorporated in a case (11) and installed near the fluorescent lamp, wherein the case (11) has openings (11a) at both ends. After the whole of the resin-sealed circuit is inserted through one of the openings 11a, each opening 11a is sealed in a liquid-tight manner.
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Description

[Detailed description of the invention]

[0001]

[Industrial applications]

 The present invention relates to a ballast for a fluorescent lamp, and more particularly to a ballast having improved durability against moisture and moisture.

[0002]

[Prior art]

 Ballasts for fluorescent lamps are necessary for stable discharge, and various types have been proposed in recent years. The life of a ballast is generally about 8 to 10 years, and early replacement is encouraged.

It is known that the life of a ballast is about 8 to 10 years because each electronic component in the circuit is exposed to moisture. Fluorescent lamps and ballasts are sometimes used by being incorporated in outdoor signboards as shown in FIG. 1, for example, and may be directly exposed to rainwater that has entered through gaps or breaks in the outdoor signboards. In addition, indoor fluorescent light stabilizers can be exposed to water due to dew condensation in winter, even if they are not exposed to the elements.

As shown in FIG. 6, a general ballast conventionally used accommodates a circuit board in which a circuit is incorporated in a case body closed by a cover, and covers an opening of the case body. The cover is screwed to the case body. For this reason, a gap is inevitably formed between the case body and the cover, and rainwater or moisture may enter through the gap.

[0005] The present inventors have made various studies on how to improve the structure of the general ballast as described above to protect circuits and electronic components from moisture and moisture. As a result, the present invention was completed.

[0006]

[Problems to be solved by the present invention] The present invention has been made in view of the above-mentioned situation of a fluorescent lamp ballast. It is to provide a long ballast by a simple structure.

[0007]

[Means for Solving the Problems]

 Means taken by the present invention to solve the above problems will be described with reference numerals used in the description of the embodiments described below. A ballast 10 having components 12 assembled in a case 11 and installed near a fluorescent lamp 20. The case 11 is integrally formed as a cylindrical shape having openings 11a at both ends. In addition, the ballast 10 "is characterized in that, after the entire resin-sealed circuit 12 is inserted through one of the openings 11a, each opening 11a is sealed in a liquid-tight manner 15".

That is, in the ballast 10 according to the present invention, the case 11 for accommodating the electronic component 12 integrated with the substrate 13 is formed in a cylindrical shape having openings 11 a at both ends. Each of the openings 11a is closed with a sealing material 15.

The case 11 is formed by drawing a metal material such as aluminum that is impermeable to moisture and moisture, and is formed in a square pipe shape. As shown in FIGS. 3 and 4, the case 11 has openings 11 a located at both ends thereof sealed with a sealing material 15, and the sealing material 15 is connected to the electronic component 12. The wiring 14 to be connected is drawn out in a liquid-tight manner.

Therefore, according to the ballast 10 of the present invention, a cylindrical member having only the openings 11 a at both ends is used as the case 11, and each opening 11 a of the case 11 is sealed by the sealing material 15. As a result, the case 11 has a structure in which no moisture or moisture enters, so that the durability against moisture or moisture is enhanced and the life is long. The same applies to the ballast 10 installed outdoors and the ballast 10 for the fluorescent lamp 20 indoors.

[0011]

[Embodiment of the invention]

 Next, the present invention configured as described above will be described according to the embodiment shown in the drawings. FIG. 1 shows a signboard incorporating a fluorescent lamp 20 which is turned on by the ballast 10 according to the present invention. This sign is installed outdoors and exposed to the elements. Of course, the ballast 10 of the present invention is also applicable to an indoor fluorescent lamp 20, in which case, for example, it can resist dew condensation.

The ballast 10 includes a substrate 13 in which electronic components 12 for performing stable discharge in the fluorescent lamp 20 are incorporated and resin-sealed as a whole, and a case 11 for accommodating the substrate 13. And a sealing material 15 for sealing the openings 11a formed at both ends of the case 11.

The case 11 is formed in a cylindrical shape from a metal material, and as shown in FIGS. 3 and 4, is formed as one having openings 11a at both ends except for the mounting portion 11b. is there. In other words, the case 11 has a structure in which moisture or moisture can enter only through the respective openings 11a when it enters.

As shown in FIG. 4, a board 13 incorporating necessary electronic components 12 is inserted into each of the openings 11 a in the case 11, and a wiring 14 from each of the electronic components 12 is provided. , Which are led out of the opening 11a through a sealing material 15 described below. In this case, it is needless to say that the moisture resistance can be further improved by sealing each electronic component 12 with resin.

The sealing material 15 closing each opening 11a is made of a hardened synthetic rubber or synthetic resin and seals each opening 11a. The sealing material 15 can reliably achieve liquid-tight sealing of the opening 11a by molding the above-described synthetic rubber or the like into the case 11. It goes without saying that the wiring 14 is led out to the outside during this molding.

FIG. 5 shows a ballast 10 according to another embodiment of the present invention. The ballast 10 is supposed to be mounted vertically with the mounting portion 11b facing upward. . As shown in FIG. 5, the sealing material 15 for sealing the opening 11a, which is an upper example of the ballast 10, is formed integrally with a crest 15a projecting upward in the figure. I have.

When the rainwater flows through the entire ballast 10, the ridge 15 a separates the rainwater into left and right parts and drops the rainwater so that the rainwater does not accumulate on the upper surface of the sealing material 15. Is what you do. Therefore, when the sealing material 15 having the peaks 15a is used, even if it rains toward the ballast 10, the rainwater can be quickly shaken off by the peaks 15a. As a result, the durability of the entire ballast 10 can be increased.

[0018]

[Effect of the invention]

 As described above in detail, according to the present invention, as illustrated in the above embodiment, “the electronic component 12 necessary for lighting the fluorescent lamp 20 is built in the case 11 and A ballast (10) installed near a lamp (20), wherein a case (11) is integrally formed as a cylindrical shape having openings (11a) at both ends, and the entire resin-sealed circuit (12) After the insertion through the opening 11a, each opening 11a is sealed in a liquid-tight manner 15. This has a structural feature, whereby the durability against moisture and moisture is enhanced, and the life is stabilized for a long time. The vessel can be provided by a simple structure.

[Brief description of the drawings]

FIG. 1 is a perspective view of a signboard incorporating a fluorescent lamp that is turned on by a ballast according to the present invention.

FIG. 2 is a plan view showing a relationship between the ballast and a fluorescent lamp.

FIG. 3 is a partial perspective view of the ballast.

FIG. 4 is a partial cross-sectional view of the ballast.

FIG. 5 is a partial sectional view showing another embodiment of the ballast.

FIG. 6 is an exploded perspective view partially showing a conventional ballast.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Ballast 11 Case 11a Opening 11b Mounting part 12 Electronic component 13 Substrate 14 Wiring 15 Sealing material 15a Mountain part 20 Fluorescent lamp

Claims (1)

[Utility model registration claims] 1. A ballast, wherein electronic parts necessary for lighting a fluorescent lamp are incorporated in a case and installed near the fluorescent lamp, wherein the case has openings at both ends. And after integrally inserting the entire resin-sealed circuit from any of the openings, the openings are liquid-tightly sealed. Ballast to do.