JPH0351947Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to a resin-sheathed capacitor used for high voltage applications such as microwave ovens.

[Technical background of the invention and its problems]

Conventionally, in a capacitor used for high voltage applications such as those for microwave ovens, for example, in which a capacitor element (not shown) is housed in a resin case 1 as shown in FIG. After accommodating the resin case 1, the resin 2 was filled up to the opening edge of the resin case 1, and the external terminals 3 and 4 were pulled out. In the microwave oven capacitor having such a structure, the exterior is composed of a resin case 1 and a filled resin 2, and the external terminals 3 and 4 protrude from the exterior. With such capacitors, there is a risk of electric shock because the live parts are exposed on the outside of the case.To prevent this, insulating caps must be attached to the terminals, and external terminals 3 and 4 should be exposed from the same surface. Because of this, there were problems such as creeping discharge being likely to occur.

[Purpose of invention]

This idea aims to prevent electric shock and improve withstand voltage.
The purpose of this invention is to provide an inexpensive capacitor with excellent characteristics, such as eliminating the need for an insulating cap to prevent electric shock.

[Summary of the idea]

The capacitor according to this invention is a capacitor in which a capacitor element is sheathed with resin, and the external terminals of the capacitor element are drawn out from the exterior resin surface, and the lead-out portions of the external terminals are each recessed parts, and the tips of the external terminals are made into recesses. It is characterized by being formed lower than the upper end surface of the recess.

[Example of idea]

As shown in Figures 1 and 2, electrode foil and plastic film were wound around a bottomed resin case 11 made of thermosetting resin such as epoxy or thermoplastic resin such as Noryl, and an electrode lead terminal was drawn out. A capacitor element 12 is housed therein. External terminals 13 and 14 made of, for example, male Faston terminals are connected to the electrode lead-out terminals of the capacitor element 12 by soldering or the like. configured to be lower. This resin case 11
Although the inside is filled with resin 15, both external terminals 13,1
The drawer portions that pull out 4 are recessed portions 16 and 1, respectively.
7, and therefore, the external terminals 13 and 14 are configured to protrude from the bottom surfaces 18 of the recesses 16 and 17. Since there is a barrier 19 between the two recesses 16 and 17, the external terminals 13 and 1
4, the creepage distance between the two is long. According to the inventor's experiments, the dimensions of recesses 16 and 17 are 48 mm x 20 mm.
×Depth 50mm, barrier 19 thickness 2.0mm, external terminal 1
Height 48mm from bottom 18 of 3, 14, external terminal 1
When the distance between 3 and 14 was 50 mm, the terminal-to-terminal withstand voltage was 3000 V after the salt water spray test at 40°C. In the case of the conventional example shown in Figure 1 under similar conditions, the voltage is 500V.
, and the improvement in withstand voltage characteristics is remarkable. In addition, since the external terminals 13 and 14 are located in the recesses 16 and 17, it is effective in preventing electric shock.
This feature also eliminates the need for insulating caps to cover the parts. In the above embodiment, a case was described in which male-type Faston terminals were used as the external terminals 13 and 14, but the same effect can be obtained even if female-type Faston terminals or terminals other than Faston terminals are used. In addition, in the embodiment, the recesses 16 and 17
Although the case has been described in which one each of external terminals 13 and 14 is pulled out, two or more external terminals 13 and 14 may be pulled out. Furthermore, even if the resin exterior is formed by direct molding without using the resin case 11, exactly the same effect can be obtained.

[Effect of idea]

In this capacitor, the creepage distance between the external terminals is increased, which improves the withstand voltage, and the provision of a recessed part and the provision of the external terminal in the recessed part has the effect of preventing electric shock and eliminating the need for an insulating cap. can be obtained.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of the capacitor according to the present invention, FIG. 2 is a front sectional view of the capacitor shown in FIG. 1, and FIG. 3 is a perspective view showing a conventional capacitor. 11... Resin case, 12... Capacitor element, 13, 14... External terminal, 15... Resin, 1
6, 17... recess, 18... bottom, 19... barrier.

Claims (1)

[Claims for Utility Model Registration] (1) In a capacitor in which a capacitor element is exteriorized with resin and external terminals of the capacitor element are drawn out from the exterior resin surface, each of the external terminal extraction parts is a recessed part, and each of the external terminals is A capacitor characterized in that the tip of the concave portion is formed lower than the upper end surface of the concave portion. (2) Utility model registration claim No. (1) characterized in that one or more external terminals are each drawn out.
Capacitors listed in section. (3) The capacitor according to claim (1) or (2) of the utility model registration claim, wherein the external terminal is a male or female Faston terminal.