JPH0410665Y2 - - Google Patents

Description

[Detailed explanation of the idea] (Industrial application field) The present invention relates to a ballast for discharge lamps.

(Prior Art) Some ballasts for discharge lamps have a ballast main body having an iron core and a coil housed in a case body, and the ballast main body is connected to a discharge lamp or other electrical parts. However, in the conventional ballast for discharge lamps of this kind, as shown in FIGS. 10 and 11, an insulating plate 3 is provided separately from the case body 2 that houses the ballast body 1, and this insulating plate 3 Above, the ballast main body 1 and the discharge lamps and other electrical parts connected to it were printed and wired (for example, Jikkosho 49-20285, Jikkosho
51−9014).

(Problem to be solved by the invention) Therefore, in the conventional case, a special insulating plate 3 is used to connect the ballast main body 1 and the discharge lamp and other electrical parts.
In addition, it is necessary to provide a mounting means or structure for attaching the insulating plate 3 to the ballast body 1 or the case body 2, which makes the structure of the ballast complicated.
There were problems in that manufacturing the ballast was troublesome and expensive, as well as increasing the overall size.

In view of the above problems, the present invention provides a ballast for discharge lamps that does not require a special insulating board for connecting the ballast body to the discharge lamp or other electrical parts, has a simple structure, is inexpensive, and can be manufactured easily. The purpose is to provide.

(Means for solving the problem) The technical means of the present invention for solving this technical problem is that the case body 11 housing the ballast case 7 is
An insulating layer 26 is provided on the metal plate 25, and this insulating layer 2
The ballast main body 7 is connected to the ballast main body 7 and the copper foil 27 is provided on the copper foil 27 to connect the ballast main body 7 to the discharge lamp and other electrical parts. By connecting the electrical components with solder 28, the ballast main body 7 and the electrical components connected thereto are printed and wired on the case body 11.

(Function) The case body 11 can also serve as a printed circuit board for connecting the ballast main body 7 and the discharge lamp 29 and other electrical components, and a special printed circuit board for connecting the ballast main body 7 and the discharge lamp 29 and other electrical components This eliminates the need for insulating plates.

(Example) Hereinafter, the present invention will be described according to the illustrated embodiment. In FIGS. 1 and 2, 7 is a ballast main body, which includes an iron core 8, a primary coil 9, and a secondary coil 10.

Reference numeral 11 denotes a case body, which has a bottom plate portion 12 and side plate portions 13 bent upward from both sides of the bottom plate portion 12 at right angles.
A housing convex portion 14 protrudes outward in the stacking direction of the core 8 to house the core 8, and a pair of widthwise pressing plate portions protrudes outward in the width direction from the housing convex portion 14 along the lower surface of the outer magnetic path of the core 8. 15 are formed.

Reference numeral 18 denotes a cover, which includes a housing convex portion 19 that protrudes outward in the stacking direction to accommodate the coils 9 and 10, and a width that protrudes outward from the convex housing portion 19 in the width direction along the lower surface of the outer magnetic path of the iron core 8. It has a pair of pressing plate parts 20 and a bent edge part 21 that projects upward from the pressing plate part 20 so as to overlap with the upper end part of the side plate part 13 of the case body 11 . The cover 18 is constructed by bending the claws 22 protruding from the side plate 13 and engaging the bent edges 21 of the cover 18, so that the stabilizer body 7 can be held between the case body 11 and the cover 18. Case body 11
Fixed.

As shown in FIG. 3, the case body 11 is provided with an insulating layer 26 made of glass epoxy or the like on a metal plate 25 such as a steel plate or an aluminum plate, and on which the ballast main body 7 and discharge lamps or other electrical equipment are placed. The ballast main body 7 and the electrical components connected thereto are connected to the copper foil 27 by solder 28, and thereby the ballast main body 7 is connected to the copper foil 27. 7 and electrical components connected thereto are printed and wired on the case body 11.

That is, as shown in FIGS. 4 and 5, a discharge lamp 29 and an AC power source 30 are connected to the ballast body 7, but the case body 1 is connected as shown in FIGS. 1 and 4.
Copper foils 27a, 27b, 27 are placed on the insulating layer 26 of 1.
c is provided, and these copper foils 27a, 27b, 27c
The primary coil 9 and secondary coil 1 of the ballast main body 7
0, a discharge lamp 29 and an AC power source 30 are soldered to form a circuit as shown in FIG.

FIG. 6 shows another embodiment, in which a copper foil 27d is provided in addition to copper foils 27a, 27b, and 27c on the insulating layer 26, and a temperature fuse 32 is connected between the copper foils 27a and 27d by soldering. It is something. In other respects, the configuration is the same as that of the previous embodiment, and in this embodiment, by breaking the circuit of the temperature fuse 32, it is possible to prevent burnout of the ballast or the occurrence of a fire due to temperature rise.

FIG. 7 shows another embodiment, in which copper foils 27a, 27
Connect capacitor 3 for power factor improvement with solder 28 between c
3 is connected, and the capacitor 33 is connected in parallel to the power supply 30.

8 and 9 show another embodiment, in which copper foils 27e, 27f, 27g, 27h are provided on the insulating layer 26 of the case body 11 as shown in FIG. 27g, 27h are the primary coil 9, secondary coil 10, and discharge lamp 2 of the ballast body 7.
9, an AC power source 30, a phase advancement capacitor 35, and a noise prevention capacitor 36 are connected, thereby forming a circuit as shown in FIG.

In addition, in FIGS. 1, 2, and 6 to 8, reference numeral 38 indicates a mounting hole provided in the bottom plate portion 12 of the case body 11.

Note that an insulating layer 26 may be provided on the metal plate 25 of the case body 11 over almost the entire area from the bottom plate part 12 to the side plate part 13 of the case body 11, but if there is no particular need to insulate the side plate part 13, The insulating layer 26 may be provided only on the bottom plate portion 12, or the insulating layer 26 may be provided only on the side plate portion 13, and this portion may also be used as a printed circuit board.

(Effect of the invention) According to the invention, the case body 11 that houses the ballast main body 7 is made of a metal-based copper clad plate, and the ballast main body 7 and the electrical components connected thereto are mounted on the case body 11. Since the ballast main body 7 and the discharge lamp 29 and other electrical parts are printed with printed wiring, the case body 11 can also be used as a printed circuit board for connecting the ballast main body 7 and the discharge lamp 29 and other electrical parts. This eliminates the need for a special insulating plate for connecting the electrical parts of the ballast, which simplifies the structure of the ballast as a whole, making it possible to downsize the ballast and to easily manufacture it at low cost. Furthermore, as mentioned above, the case body 11 can be used as a printed circuit board, eliminating the need for a special insulating board, which facilitates automation of ballast manufacturing and improves heat transfer from the ballast body 7 to the case body 11. From this point of view as well, the ballast can be further miniaturized, and its practical effects are significant.

[Brief explanation of the drawing]

Figure 1 is a plan view showing one embodiment of the present invention;
Figure 3 is an exploded perspective view of the same, Figure 3 is a sectional view of the case body, Figure 4 is a configuration diagram showing the state of connection between the ballast body and other electrical components, and Figure 5 is an electrical circuit diagram of the same. . FIGS. 6 and 7 are plan views showing other embodiments, respectively. FIG. 8 is a plan view showing another embodiment, and FIG. 9 is a circuit diagram thereof. FIG. 10 is a side sectional view showing a conventional example, and FIG. 11 is an exploded perspective view of the same. 7... Stabilizer body, 11... Case body, 29...
...Discharge lamp, 32...Temperature fuse, 33, 35,
37... Capacitor.

Claims (1)

[Scope of utility model registration request] The case body 11 that houses the ballast case 7 includes an insulating layer 26 provided on the metal plate 25 , and the insulating layer 26
It is composed of a metal base copper clad plate, on which is provided a copper foil 27 for connecting the ballast body 7 and the discharge lamp and other electrical parts. A ballast for a discharge lamp characterized in that the ballast main body 7 and the electrical components connected thereto are printed and wired on the case body 11 by connecting the parts with solder 28.