JPS635216Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a capacitor equipped with mounting legs that can be attached with screws, nuts, etc.

Conventionally, in this type of capacitor, in a capacitor using a metal case such as aluminum or tin, an outer case 1 is used as shown in Fig. 1.
is a conductive material, it is necessary to interpose an insulator 3 between the outer case 1 and the capacitor element 2, and give sufficient consideration to insulation from the capacitor element 2. 5, gaps were likely to form due to differences in expansion and contraction rates due to temperature and other factors. Therefore, it is necessary to take precautions against moisture absorption, such as resin sealing with epoxy resin 6, which has the drawbacks of extremely low productivity and poor reliability.

Furthermore, in a capacitor using a plastic case, as shown in Fig. 2, the mounting legs 7 are also formed of plastic at the same time as the case 8, but when tightened with screws, nuts, etc.
Or, there was a risk of damage when mechanical shocks such as vibrations were applied after installation. In addition, the second
In the figure, 9 is an insulating filling resin.

The present invention improves these conventional problems and provides a capacitor that has excellent electrical characteristics and is easy to handle. Hereinafter, an embodiment of the present invention will be explained using the drawings of FIGS. 3 to 7.

3 to 5 show a capacitor according to an embodiment of the present invention, and in the figures, 10 is a case made of plastic, and the inside of this case 10 is divided into two spaces by an insulating wall 10a. .
Reference numeral 11 denotes a capacitor element having a lead wire 11a, which is housed in one space within the case 10. 12 is a metal mounting leg having a hole 12a;
A part of the side where the hole 12a is provided is inserted into the case 10 through an insertion hole 13 provided at the bottom of the remaining space of the case 10.

14 is an insertion guide for supporting the portion of the mounting leg 12 inserted into the case 10, and 15 is a filling resin filled into the case 10.

According to this structure, by press-fitting the mounting leg 12 into the case 10 through the insertion hole 13, the mounting leg 12 is supported by the insertion guide 14, and in this state, the filled resin 1 is inserted into the case 10.
It is fixed by filling 5.

Note that if the dimensions of the mounting leg 12 and the insertion hole 13 of the case 10 are made so that the insertion hole 13 side is slightly smaller, the filled resin 15 will not leak to the outside. Further, the mounting leg 12 is provided with a hole 12a, and the filling resin 15 bites into the mounting leg 12 through the hole 12a, so that the mounting leg 12 can be firmly attached to the case 10. Even if the hole 12a provided in this mounting leg 12 is not one,
Two or three pieces may be provided.

FIG. 6 shows the relationship between the number of holes 12a provided in the mounting leg 12 and the mounting strength, where the solid line indicates the case where round holes are provided and the dotted line indicates the case where triangular holes are provided.

As is clear from FIG. 6, sufficient strength can be obtained by providing one or more holes 12a in the mounting leg 12.

Note that in the above embodiment, the mounting leg 1
2 is press-fitted into the case 10 from the bottom, but it may also be inserted from the top of the case 10 on the opening side, as shown in FIG.

As described above, according to the capacitor of the present invention, since a plastic case is used, sufficient insulation can be obtained without special consideration, and the mounting legs can be firmly attached. Since the metal mounting legs are used, there is no possibility of damage when tightening with screws, nuts, etc., or when external shocks are applied.

[Brief explanation of the drawing]

1 and 2 are sectional views showing a conventional capacitor, FIG. 3 is a front sectional view of a capacitor according to an embodiment of the present invention, FIG. 4 is a side sectional view of the same, and FIG. 5 is a sectional view of the same capacitor. FIG. 6 is a characteristic diagram showing the relationship between the number of holes provided in the mounting leg of the capacitor and its strength. FIG. 7 is a side view showing a capacitor according to another embodiment of the present invention. FIG. 10... Case, 10a... Insulating wall, 11...
Capacitor element, 12...Mounting leg, 12a...Recess, 15...Filled resin.

Claims (1)

[Scope of utility model registration request] The interior of a case made of plastic filled with resin is divided into two spaces by an insulating wall, and one space houses a capacitor element, while the other space has a portion embedded in the filling resin. A capacitor with mounting legs inserted with holes.