JPS622760Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement in the element support structure of an electrolytic capacitor.

Generally, in an electrolytic capacitor, as shown in Fig. 1, the inner bottom of an aluminum case 1 is filled with molten insulating compound 3, and then a capacitor element 2 with a terminal plate 5 attached thereto is inserted through a pull-out lead 4, and the insulating compound 3 is cooled. The capacitor element 2 was fixed by solidifying it. However, since the high-temperature insulating compound is handled, the capacitor element 2 is heated and its characteristics deteriorate, and the filling operation is dangerous and the workability is poor.

In order to improve the above-mentioned drawbacks, as shown in FIG. 2, a ring 6 made of a resin such as polyethylene or polypropylene having a notch 7 is inserted between the element 2 and the terminal plate 5, and a lead-out lead is inserted into the space inside the ring. 4
An electrolytic capacitor in which the element 2 is fixed and sealed by storing these in a case 1 and rolling caulking around the opening of the case 1 is known from Utility Model Publication No. 54-978 and put into practical use. has been made into However, since the resin ring inserted between the terminal plate and the capacitor element is arranged so as to be placed on the outer periphery of the capacitor element, that is, on the outside of the lead-out lead, the lead-out lead portion becomes a space. Therefore, it was not possible to ensure an insulating distance between the drawer leads, resulting in frequent shoot failures. In addition, the element is fixed and sealed by roll caulking around the case opening, but since the ring is placed at the peripheral edge of the element, extreme force is applied to the peripheral edge of the element during caulking. There was a risk that the element would be deformed and the electrodes or electrolytic paper would be damaged, leading to deterioration of characteristics.

The present invention provides an electrolytic capacitor that improves the above-mentioned drawbacks.The plate to be inserted between the terminal plate and the capacitor element is formed into many pieces in a cross shape, an X shape, etc. The present invention provides an electrolytic capacitor that is stably fixed and provides insulation between lead leads.

Hereinafter, the present invention will be explained in detail based on the embodiment shown in FIG.

11 is a cylindrical bottomed aluminum container having an explosion-proof valve 17; 12 is a capacitor element; 14 is a lead-out lead; 15 is a terminal board; 18 is an insulating plate formed in a cross shape; An elastic body 13 made of soft rubber molded into a donut shape is inserted into the provided cylindrical aluminum container 12, and a terminal plate 15 is attached thereon by a pull-out lead 14. A piece 18' of a cross-shaped insulating plate 18 made of an insulating resin such as polypropylene as shown in FIG. 4 is inserted between the terminals 14 of the multi-terminal capacitor. After that, the terminal board 1 is stored in the container 11, and the opening 16 of the container 11 is tightened.
5 is an electrolytic capacitor configured to seal a container 11 and support a capacitor element 12.

Note that the X-shaped or cross-shaped insulating plate is not limited to a hard plate, and may be made of an elastic material such as rubber. In addition, the material of the elastic body 13 was soft rubber, but
It may be a synthetic rubber with low hardness, a foamed synthetic rubber, or a polymer foam. Further, the shape is made into a donut shape so that a gap is created between the explosion-proof valve 17 portion of the container 11 and the element 12. Furthermore, the elastic body 13
It is even better if the end surface of the elastic body 13 climbs up the side surface of the container 11 as the element 12 is pressed down and serves as the side surface spacer 13'.

The cross-shaped insulating plate 18 of the present invention is not limited to the shape of the embodiment, but each piece is provided as shown in FIGS. 6 and 7, and the pieces are interposed between the drawer leads, and the insulating plate is stabilized. It is designed so that it can be placed in
Unlike conventional products, there is no risk of shorts between terminals.
Furthermore, the cross-shaped or X-shaped
The structure is not limited to those shown in the figures and FIG. 7, and may include a plurality of pieces 18'.

In the electrolytic capacitor of the present invention constructed as described above, an X-shaped or cross-shaped insulating plate 18 of an unprecedented shape is inserted between the capacitor element 12 and the terminal plate 15, and the piece 18 of the plate 18 is inserted between the capacitor element 12 and the terminal plate 15. ' is terminal 14
Since the capacitor element 12 is supported by being interposed between the terminals 14 and 14, there is no shot between the terminals 14, and the arrangement is extremely stable, and the peripheral edge of the element 12 is not damaged by force due to tightening, etc., as in the conventional case. It has the effect that there is no problem, and is useful for practical purposes.

[Brief explanation of the drawing]

Figure 1 is a sectional view of a conventional electrolytic capacitor, Figure 2 is a cross-sectional view of a conventional electrolytic capacitor.
Figure A is a cross-sectional view of a conventional electrolytic capacitor, B is a perspective view of a resin ring in A, Figure 3 is a cross-sectional view of an embodiment of the electrolytic capacitor of the present invention, and Figure 4 is the cross-shaped insulation shown in Figure 3. FIG. 5 is a perspective view of the elastic body of FIG. 3, and FIGS. 6 and 7 are cross-sectional views of other embodiments of the cross-shaped insulating plate of FIG. 3. 11: Container, 12: Capacitor element, 13: Elastic body, 14: Output lead, 15: Terminal board, 17:
Explosion-proof valve, 18: Cross-shaped insulating plate.

Claims (1)

[Scope of utility model registration request] A cylindrical container made of metal such as aluminum with an explosion-proof valve equipped at the bottom, a capacitor element attached to a sealing terminal plate, and an insulating resin such as polypropylene or rubber between the terminal plate and the capacitor element. A cross made of elastic material such as
An electrolytic capacitor constructed by inserting a plate in which a plurality of X-shaped pieces are formed radially to tighten the opening of the container and support a capacitor element.