JPS593566Y2 - Chip type electrolytic capacitor - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a chip-type electrolytic capacitor for printed circuit boards.

2. Description of the Related Art As electronic circuits become more integrated into ICs or printed circuit boards into cards, demands for smaller electronic components, higher reliability, and automatic assembly are becoming stronger.

Conventional foil-wound aluminum electrolytic capacitors generally have a cylindrical shape, which poses problems in terms of actual mounting area and mounting stability.

Moreover, the shape of the capacitor itself could not be immediately adapted to the purpose of wiring hooks.

The present invention aims to eliminate the drawbacks associated with the shape of the conventional aluminum electrolytic capacitors, as well as improve capacitor characteristics and workability, and will be described in detail based on embodiments shown in the drawings.

Figure 1A shows an anode 1 formed from an aluminum plate into a rectangular convex body, and the opening in Figure 1 is a perspective view of a cathode 2 having the same shape.The electrodes of the anode 1 and cathode 2 are fitted together. Yes, 2
It has collars 1' and 2' on two sides.

As shown in FIG. 2, the anode 1 has the outer surface of the convex portion roughened and then an oxide film 3 is applied by chemical conversion, and the cathode 2 has the inner surface of the convex portion roughened.

Note that the dimensions of the anode 1 and the cathode 2 are a'>a and b=b'.

Figure 3 is an assembly diagram of the aluminum electrode. Lead wire terminals 4 and 4' are attached in advance to the ribs 1' and 2' of the anode 1 and cathode 2, respectively, making sure that the ribs 1' and 2' do not overlap each other. The position is shifted, and the fourth
Assemble as shown.

Next, the combined element is impregnated with an electrolytic solution, housed in a resin exterior case 6, 6', and sealed with resin so as to fix the lead terminals.

Note that the terminal shape of the lead terminal can be changed depending on the purpose of assembly, and the terminal mounting position can be arbitrarily designed in the front and back, left and right directions.

Figure 8 shows a structure in which both the inner and outer surfaces of the convex part of the anode electrode are roughened, an oxide film 3 is applied, and the cathode is arranged in two layers, upper and lower. Furthermore, the anode and cathode can be stacked in multiple layers, resulting in a large capacity. A capacitor can be formed.

In addition, the shape of the molding is not only square, but also circular, oval, and polygonal. The collars may be installed in positions facing each other as shown in Figure 10, and the size of the collars may be It may be different in size.

Further, as the metal material for molding, other than aluminum, metal materials having valve action such as tantalum, titanium, and niobium can be used.

The present invention As described above, the aluminum electrolytic capacitor according to the present invention is constructed by stacking anodes and cathodes alternately, so it is easy to assemble, making it easy to rationalize, simplify, and automate the assembly. As shown in FIG. 7, the shape of the mounting board can be quickly adapted to suit the purpose and purpose, and has great industrial and practical value.

[Brief explanation of the drawing]

FIG. 1A 90 is a perspective view of an anode 1 and a cathode 2 made of molded aluminum electrodes of the present invention, FIG. 2A 90
3 is a cross-sectional view of the anode 1 and cathode 2 formed by aluminum electrolysis of the present invention, FIG. 3 is an exploded view of the aluminum electrode assembly of the present invention, FIG. 4 is a cross-sectional view of the electrode assembly of the present invention, and FIG. 5 is the chip of the present invention. Figure 6 is a cross-sectional view of the chip type electrolytic capacitor of the present invention, Figure 7 is an embodiment of the terminal drawer of the present invention, 190 is a vertical perspective view, C and 2 are horizontal types. A perspective view, FIG. 8 is a cross-sectional view of an embodiment of the chip-type electrolytic capacitor of the present invention in which the cathode has a two-layer structure, and FIG. 9 is a chip-type electrolytic capacitor of the present invention in which the lead wires are drawn out in the vertical and opposite directions. FIG. 10 is a sectional view of another embodiment of the electrode according to the present invention, and FIG.
FIG. 1 shows a front view of another embodiment of the circular electrode according to the present invention. 1: Anode, 2: Cathode, 1', 2': Collar, 3: Oxide film, 4゜4': Lead wire terminal, 5: Separator, 6.6
' : Resin exterior case.

Claims (1)

[Scope of utility model registration request] A convex body having a brim on the periphery corresponding to 1,000 or less of the total circumference length is formed from a metal plate having a valve action, and after roughening the inner and outer surfaces or either surface of the convex part, an oxide film is applied. A convex body that has the same shape as the anode and can be fitted to the anode is molded from a metal plate having a valve action, and the inner and outer surfaces or any of the surfaces of the convex part are roughened or coated with an oxide film after the roughening. This is a chip-type electrolytic capacitor with a laminated structure in which the electrodes are fitted as counter electrodes, and the ribs of both electrodes are fitted alternately through separators so that they do not overlap.