JPH01140707A - Ballast for discharge lamp - Google Patents

Abstract

PURPOSE:To prevent a varnish from being applied to an outside connection terminal of a ballast by a method wherein a terminal coating part which covers one part or a whole part of the outside connection terminal and which is structured to be removed after the ballast for a discharge lamp has been impregnated with the varnish is molded collectively together with a winding bobbin. CONSTITUTION:A winding bobbin 3 where a terminal coating part 32 covering one part or a whole part of an outside connection terminal 11 has been molded collectively is used. In a state that a ballast has been assembled, one part or the whole part of the outside connection terminal 11 of the ballast is covered with the terminal coating part 32; accordingly, when the ballast is impregnated with a varnish, the varnish is not applied to the surface of the outside connection terminal 11. In addition, because the terminal coating part 32 is structured so as to be easily separated and removed from the collectively molded winding bobbin 3, the terminal coating part can be removed together with the applied varnish film after the varnish has been dried and hardened. By this setup, it is possible to easily expose a connection conductive part which is not covered with a varnish coating.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention has a structure in which a face does not adhere to an external connection terminal. This invention relates to a varnish-impregnated discharge lamp ballast.

[Conventional technology]

In the exposed type discharge lamp ballast impregnated with varnish, as shown in FIG. Retained and exposed. Since the ballast 9 is impregnated with varnish after being assembled, the external connection terminal 11 is also covered with the varnish film 2 as shown in FIG. Since the external connection wires are connected, it is necessary to remove the adhered varnish film. Therefore, conventionally, after the varnish impregnation treatment, part or all of the external connection terminals 11 are rubbed with a wire brush or the like.
The attached face was removed to expose the connection conductive portion of the external connection terminal 11.

[Problem that the invention seeks to solve]

The above-mentioned conventional technology has poor workability as it scrapes off the face adhered to the external connection terminal after it is impregnated with varnish and dried and hardened, resulting in damage to the conductive part or the scraped hardened varnish entering the inside of the ballast. There was a problem.

SUMMARY OF THE INVENTION An object of the present invention is to obtain a ballast for a discharge lamp having a structure in which a face is not attached to an external connection terminal of the ballast.

[Means for solving problems]

The above purpose is to cover part or all of the external connection terminals,
This can be achieved by molding the terminal covering portion of the discharge lamp ballast, which can be removed after impregnation with varnish, integrally with the winding bobbin.

[Effect]

The ballast for a discharge lamp according to the present invention uses a winding bobbin integrally formed with a terminal covering portion that covers part or all of an external connection terminal. Therefore, in the assembled state of the ballast, some or all of the external connection terminals of the ballast are covered with the terminal coating, so when impregnating the ballast with varnish, the external connection terminals of the ballast are covered with varnish. No varnish will adhere to the surface. In addition, since the terminal covering part has a structure that allows it to be easily separated and removed from the integrally molded winding bobbin, the terminal covering part can be removed together with the attached varnish film after the varnish has dried and hardened. For example, the connection conductive portion of the external connection terminal can be easily exposed without damaging it.

〔Example〕 Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a front view of a coil terminal section showing a first embodiment of a ballast for a discharge lamp according to the present invention, FIG. 2 is a front view of the coil terminal section of the above embodiment with the terminal covering section removed, and FIG. FIG. 4 is an enlarged view of the main part of the above embodiment with the first terminal attached, excluding the terminal covering portion, and FIG. 5 is a front view of the coil terminal section showing the second embodiment.
The figure is a front view of a coil terminal section showing a third embodiment of the present invention.
FIG. 6 is a diagram showing a state in which the terminal covering portion of the above embodiment is removed and the connecting wire is connected by one lead. In FIG.

A terminal holding portion 31 provided at one end of, for example, a synthetic resin bobbin 3 around which a coil 8 is wound is extended, and a terminal covering portion 32 covering the entire external connection terminal 11 on the exposed terminal board 1 is inserted through a thin groove portion 33. It is molded in one piece. When the ballast equipped with the coil 8 is assembled and impregnated with varnish, the surfaces of the coil 8, bobbin 3, terminal holding section 31, and terminal covering section 32 are covered with the varnish coating 2. After drying the ballast and curing the varnish,
2 is bent up and down, the terminal covering portion 32 is bent and removed from the thin groove portion 33, and the external connection terminal 11 is exposed as shown in FIG.

In the second embodiment shown in FIG. 3, the terminal covering part 32' covers only the lower surface of the external connection terminal 11, and after being impregnated with varnish and drying, the terminal covering part 32' is bent from the thin groove part 33. When the external connection terminal 11 is removed, a conductive connection portion oozes out from the bottom surface of the external connection terminal 11.

FIG. 4 shows a state in which the first terminal 4 is press-fitted into the external connection terminal 11, and in this way, electrical connection with the outside can be maintained.

Note that 2 surrounded by the first terminal 4 is a varnish coating that covers the upper surface of the external connection terminal 11.

In the third embodiment shown in FIG. 5, a terminal covering portion 32″′ is provided so as to cover the upper surface of the external connection terminal 11, contrary to the second embodiment.
In this example, if the terminal covering portion 32'' is removed after being impregnated with varnish and dried, the connecting conductive portion is exposed on the upper surface of the external connecting terminal 11 as shown in FIG. The wire 5 can be easily connected.

〔Effect of the invention〕

As described above, the ballast for discharge lamps according to the present invention is provided.

In a varnish-impregnated discharge lamp ballast having an exposed terminal plate, a terminal covering is structured such that it covers part or all of the external connection terminals provided on the exposed terminal plate and can be removed after the discharge lamp ballast is impregnated with varnish. By providing a winding bobbin integrally molded with a winding bobbin, the external connection terminal covered with the terminal covering part is not covered with the varnish coating when the ballast is impregnated with varnish, and the terminal is not covered with the varnish coating after the varnish dries. Since the coating can be easily removed, the connected conductive parts not covered by the varnish coating can be easily exposed without causing any damage.

[Brief explanation of the drawing]

Fig. 1 is a front view of a coil terminal section showing a first embodiment of a ballast for a discharge lamp according to the present invention, Fig. 2 is a view showing the above embodiment with the terminal covering section removed, and Fig. 3 is a front view of the coil terminal section showing a first embodiment of a ballast for a discharge lamp according to the present invention. A front view of a coil terminal section showing a second embodiment of the invention, FIG. 4 is an enlarged view of the main part of the above embodiment with a first terminal attached, excluding the terminal covering section, and FIG. 5 is a third embodiment of the invention. FIG. 6 is a front view of the coil terminal section showing the above-mentioned embodiment, with the terminal covering section removed and the connecting wires soldered. FIG. 7 is a plan view of a conventional ballast for a discharge lamp, and FIG. 8 is a front view of the coil portion of the conventional example after being impregnated with varnish. 1...ji! Output terminal board, 3...Winding bobbin, 1]・
...External connection terminal, 32.32', 32"...Terminal covering part.

Claims (1)

[Claims] 1. In a varnish-impregnated discharge lamp ballast having an exposed terminal plate, a terminal covering is structured such that it covers part or all of the external connection terminals provided on the exposed terminal plate and can be removed after the discharge lamp ballast is impregnated with varnish. A ballast for a discharge lamp, characterized in that it is equipped with a winding bobbin whose parts are integrally molded.