JPH0236261Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a capacitor having a resin case exterior with an improved external terminal drawer structure.

In recent years, the trend toward resin case exteriors has become more widespread in the capacitor sector in order to reduce costs by improving workability, and film capacitors are no exception to this trend. Generally, as shown in FIG. 1, film capacitors using a resin case have conventionally housed, for example, a metallized film capacitor element 2 in a bottomed resin case 1, and lead wires 3 led out from the capacitor element 2. is connected to an external terminal 5 fixed to a terminal fixing plate 4 whose outer diameter is smaller than the inner diameter of the resin case 1.
The cavity is filled with sealing resin 6.

However, with the above configuration, the sealing resin 6 must be filled from the gap between the inner diameter of the resin case 1 and the terminal fixing plate 4, which requires a lot of time to fill the sealing resin 6, and at the same time, the terminal fixing plate is prepared separately in advance. No significant cost reduction could be expected by using 4.

The purpose of the present invention is to provide a capacitor with a resin case exterior that can sufficiently secure the external terminal pull-out position and fixed state by omitting the terminal fixing plate by improving the resin case opening and the external terminal shape. That is.

An embodiment of the present invention will be described below with reference to the drawings. That is, as shown in FIGS. 2 and 3, a flange 11 is provided around the opening, a hollow groove 12 is provided in the flange 11, and a recess 13 is connected to the hollow groove 12 at an opposing position inside the hollow groove 12. The capacitor element 15 is housed in the resin case 14 provided with a Using an external terminal 19 consisting of an external connection part 18 extending upward, the cavity groove insertion part 17 constituting the external terminal 19 is positioned in the cavity groove 11, and the leader wire connection part 16 is positioned in the resin case 14. The lead wires 20 led out from the capacitor element 15 are attached to each of the lead wire connection parts 16, and then the cavity of the resin case 14 is filled with sealing resin 21, and the sealing resin 21 is bury the lead wire connection portion 16, and fill the sealing resin 2.
1 is hardened and the external terminals 19 are integrally fixed.

According to the capacitor configured as described above, the cavity groove insertion part 17 constituting the external terminal 19 is positioned in the cavity groove 12, the lead wire connection part 16 is located in the resin case 14, and the external connection part 18 is positioned in the cavity groove 12. By simply arranging the external terminals so as to lead them out to the outside, the external terminals can be sufficiently secured in their pull-out positions and fixed states, and the terminal fixing plate can be omitted.Moreover, the process of filling the sealing resin 20 can be easily performed, resulting in significant cost reductions. have.

Next, other embodiments of the present invention will be described. That is, in the above embodiment, the outer shape of the resin case is circular, and the hollow groove provided around the opening is provided around the entire periphery. However, as shown in FIG. 5, the outer shape is oval. As a hollow groove 2, only the part where the external terminal is arranged is
The resin case 24 may have a flange 23 as shown in FIG. Any structure that does not protrude from the outer periphery may be used. 25 is a recessed portion.

Furthermore, the shape of the external terminal is not limited to that of the above-mentioned embodiments, and as shown in FIGS. 6 to 9, the external terminal 39 has an L-shaped cross-section of the leader wire connection part 36 and the hollow groove insertion part 37. Of course, as shown in FIG.
The same effect can be obtained even if the external terminal 49 has a T-shaped cross section. 38 and 48 in the figure have the same effect on the external terminal 49.

As described above, according to the present invention, the resin case has a flange around the opening of the resin case, a hollow groove in the flange, and a recess connected to the hollow groove at an opposing location inside the hollow groove. , the cross-sectional shape of the leader wire connection part and the hollow groove insertion part is L-shaped or T-shaped, and an external terminal is provided with an external connection part above the leader wire connection part, and the hollow groove insertion part is inserted into the hollow groove. An inexpensive capacitor is provided with a resin case exterior in which the terminal fixing plate is omitted by arranging the lead wire connection portions in positions within the resin case, and the external terminal pull-out position and fixed state can be sufficiently ensured. Obtainable.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a conventional capacitor; FIGS. 2 and 3 are cross-sectional views of a capacitor according to an embodiment of the present invention; FIG. Figure 4 is a perspective view showing the external terminals constituting the capacitor shown in Figures 2 and 3;
This figure is a perspective view showing a resin case according to another embodiment of the present invention, and FIGS. 6 to 10 are perspective views showing respective external terminals according to other embodiments of the present invention. 11, 23... collar part, 12, 22... hollow groove,
13, 25... Recessed portion, 14, 24... Resin case, 15... Capacitor element, 16, 36, 46
...Leader line connection part, 17, 37, 47...Cavity groove insertion part, 18, 38, 48...External connection part, 1
9, 39, 49...External terminal, 20...Leader wire,
21...Sealing resin.

Claims (1)

[Scope of utility model registration request] A capacitor element from which a lead wire is led out, a flange provided around an opening in which the element is housed, a cavity groove provided within the flange, and a recess provided within the cavity groove in connection with the cavity groove. The cross-sectional shape of the resin case consisting of the lead wire connection part and the cavity groove insertion part is L-shaped or T-shaped.
The external terminal has a shape and an external connection part extending above the leader line connection part, and a sealing resin filled in the cavity of the resin case, and the cavity groove insertion part of the external terminal is inserted into the cavity groove. A capacitor characterized in that a leader line connecting portion is disposed in each of the resin cases, and the leader wire and the leader line connecting portion are connected.