JPS62188305A - Capacitor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a capacitor provided with a mounting leg that can be mounted with a screw, nut, or the like.

(Prior Art) Conventionally, capacitors equipped with this type of mounting legs have been widely used for mounting capacitors on the bodies of automobiles, home appliances, and the like.

FIGS. 5 and 6 show conventional configurations. In FIG. 5, reference numeral 1 denotes a plastic case that houses the capacitor element 2, and mounting legs 3 are formed at the same time as the plastic case 1. 4 is a lead wire for drawing out the electrodes, 5 is a filling resin for sealing the case 1, and 6 is a mounting hole.

In FIG. 6, 7 is a metal mounting leg, 8 is a plastic case that houses the capacitor element 2, 9 is an insertion hole into which a part of the metal mounting leg 7 is inserted, and 1° is the insertion hole for the metal mounting leg 7. This is a guide to make it easier.

(Problem to be Solved by the Invention) In the above configuration, in the case shown in FIG. Since it is made of plastic, it has low strength and has the disadvantage that the mounting legs may break. In addition, in the case of Fig. 6, it is necessary to have good adhesion between the insertion hole and the metal mounting leg, but gaps are likely to occur, and the filled resin may leak from the insertion hole to the outside, resulting in poor productivity. Was.

SUMMARY OF THE INVENTION An object of the present invention is to provide a capacitor which eliminates the drawbacks of the conventional capacitor, has strong mounting legs, is free from damage, is easy to handle, has high productivity, and is smaller than the conventional capacitor.

(Means for Solving the Problems) The capacitor of the present invention has a plate-shaped metal mounting leg fixed to the surface of a capacitor element, and the entire capacitor is covered with an exterior body.

(Function) With the above configuration, the mounting legs are made of metal, which increases the strength of the mounting legs, and since the mounting legs and the capacitor element are integrated, the exterior is coated with liquid resin or powder resin. Alternatively, it is possible to use a molded exterior, which increases productivity, and allows the exterior thickness to be applied thinly and almost uniformly around the capacitor element, resulting in a smaller size.

(Example) An example of the present invention will be described based on FIGS. 1 to 4. In this figure, the same parts as those in the conventional example shown in FIGS. 5 and 6 are designated by the same reference numerals, and the explanation thereof will be omitted.

FIG. 1 shows the structure of a capacitor in a first embodiment of the invention. In FIG. 1 (, ), 11 is a plate-shaped metal mounting leg that is U-shaped and has a small hemispherical protrusion 12 at one end and a mounting hole 13 at the other end. 14 is an exterior resin. In the capacitor configured as described above, as shown in FIG. 1(b), the mounting leg 11 is made into a U-shape to give it elasticity, and the dimension A of the U-shaped portion 15 of the mounting leg 11 is set to the size of the capacitor element. 2
By making the width B smaller than the width B of the mounting leg 1 by, for example, about 0.5 to 2.0 mm, when the capacitor element 2 is press-fitted into the U-shaped part 15 of the mounting leg 11, the width B of the mounting leg 1
It springs into contact with the inner surface of the U-shaped portion 15 of No. 1 and is fixed. The hemispherical protrusion 12 is connected to the U-shaped portion 15 of the mounting leg 11 of the capacitor element 2.
It has a hemispherical shape to reduce friction when press-fitting. In the present invention, dip packaging is performed in this state using liquid or powder resin.

As described above, according to this embodiment, the mounting leg 11 is made into a U-shape, the capacitor element 2 is press-fitted into the U-shaped part 15 and both are fixed, and then the dip exterior is applied with liquid or powder resin. Capacitors with strong mounting legs and high productivity can be obtained.

FIG. 2 shows the structure of a capacitor according to a second embodiment of the present invention. In the figure, after fixing the mounting leg 11 and the capacitor element 2 in the first embodiment in the opposite direction, the mounting leg 11 and the capacitor element 2 are fixed in the opposite direction, and then molded exterior is performed with exterior resin 14.

According to the present embodiment described above, it is also possible to attach the mounting leg 11 in the direction opposite to the direction in which the lead wire 4 is pulled out.

FIG. 3 shows the structure of a capacitor according to a third embodiment of the present invention. In the figure, the case 16 and the exterior are made of the filling resin 5, and the mounting legs 11 are fixed to the capacitor element 2 in advance, so the case 16 and the mounting legs 11 are fixed before the filling resin 5 is injected. Therefore, the mounting leg insertion guide 10 shown in FIG. 6 becomes unnecessary, and the case can be made smaller than the conventional case.

FIG. 4 shows the structure of a capacitor according to a fourth embodiment of the present invention. In the figure, the capacitor element 2 and the metal mounting leg 17 are fixed by partially curving the resilient contact between the capacitor element 2 and the metal mounting leg 17, or by using a U-shaped metal mounting leg 17. This ensures surface contact, resulting in a strong and highly stable fixation.

(Effects of the Invention) According to the present invention, by fixing a plate-shaped metal mounting leg to the surface of a capacitor element and covering the whole with an exterior body, the mounting leg is strong, has no fear of breakage, and is easy to handle. Easy, highly productive, and even smaller capacitors are provided.
Its practical effects are significant.

[Brief explanation of drawings]

FIG. 1(a) is a perspective view showing a part of an embodiment of the capacitor of the present invention in cross section, FIG. 1(b) is a side view of the metal mounting leg of the same capacitor, and FIG. 1(c) is a side view of the metal mounting leg of the capacitor. A side view, FIG. 2, FIG. 3, and FIG. 4 are respectively a perspective view, a sectional side view, and an internal side view showing other embodiments of the capacitor of the present invention, and FIGS. 5 and 6 are a side view of the same capacitor element. FIG. 2 is a cross-sectional view of a conventional capacitor. 2... Capacitor element, 4... Lead wire, 5
...Filled resin, 1o...Guide, 11.17...
Metal mounting leg, 12... Hemisphere projection, 13... Mounting hole, 14... Exterior resin, 15... U-shaped portion, 16...
Case. A...Dimensions of the U-shaped part, B...Width of the capacitor element. Patent applicant: Matsushita Electric Industrial Co., Ltd. Figure 1 (a) (b) Figure 2 Figure 3 Figure 16 ---γ-Person Figure 4 Figure 17, -〇IR mounting leg Figure 5 Figure 6

Claims (1)

[Claims] A capacitor characterized by having plate-shaped metal mounting legs fixed to the surface of the capacitor element, and the entire surface being covered with an exterior body.