JP2946669B2 - Chip type aluminum electrolytic capacitor - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chip type aluminum electrolytic capacitor in which an aluminum electrolytic capacitor main body is housed in a resin case.

2. Description of the Related Art A conventional chip-type aluminum electrolytic capacitor of this type has a configuration as shown in FIG. That is, an aluminum electrolytic capacitor body 3 having an anode lead terminal 1 and a cathode lead terminal 2 derived from one side of a capacitor element,
A resin case 4 for accommodating the aluminum electrolytic capacitor main body 3;
The anode lead terminal 1 and the cathode lead terminal 2 were housed in the case 4 so as to be led out from one side of the case 4.

Problems to be Solved by the Invention However, in the above-described conventional chip-type aluminum electrolytic capacitor, when the chip-type aluminum electrolytic capacitor is surface-mounted by soldering to a printed circuit board, the chip-type aluminum electrolytic capacitor and the printed circuit board are not mounted. Is fixed at the portions of the anode lead terminal 1 and the cathode lead terminal 2 which are led out from one side of the resin case 4, so that the vibration resistance is poor, and therefore,
In the case of a chip type aluminum electrolytic capacitor having a large external dimension, there is a problem that the fixing strength is insufficient.

The present invention solves such a conventional problem.In addition to improving the fixing strength to a printed circuit board, the vibration resistance can be improved, and only the aluminum electrolytic capacitor body having a small external dimension is used. It is another object of the present invention to provide a chip-type aluminum electrolytic capacitor in which an aluminum electrolytic capacitor body having a large outer dimension can be formed into a chip.

Means for Solving the Problems In order to achieve the above object, a chip-type aluminum electrolytic capacitor of the present invention has a bottomed bottom in which a capacitor element obtained by winding an anode foil and a cathode foil together with a separator and impregnating an electrode solution is accommodated. An aluminum electrolytic capacitor body having a cylindrical metal case, an anode lead terminal and a cathode lead terminal connected to the capacitor element, and a resin case housing the aluminum electrolytic capacitor body; In this case, an even number of aluminum electrolytic capacitor bodies are housed in such a case that the anode lead terminal and the cathode lead terminal are located at both ends of the resin case.

According to the chip-type aluminum electrolytic capacitor having the above structure,
When an even number of aluminum electrolytic capacitor bodies are housed in a resin case, the anode lead terminal and the cathode lead terminal come out from both ends of the resin case. The chip-type aluminum electrolytic capacitor can be fixed on a printed circuit board in a more stable state compared to the case where the anode lead terminal and the cathode lead terminal are led out, so that the lead terminal bends even when a vibration test is performed. It can be implemented correctly because it will not be dropped or cut. Also, since an even number of aluminum electrolytic capacitor bodies are accommodated in one resin case, a large-capacity, multi-element chip-type aluminum electrolytic capacitor can be easily manufactured. .

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a perspective view of a chip type aluminum electrolytic capacitor according to an embodiment of the present invention, and FIG. 2 is a sectional view of the aluminum electrolytic capacitor. In FIG. 2, reference numerals 11 and 12 denote aluminum electrolytic capacitor bodies.
Winds the anode foil and cathode foil together with the separator,
And metal cases 13 and 14 made of cylindrical aluminum having a bottom and containing therein a capacitor element (not shown) impregnated with an electrolytic solution, and one end opening of the metal cases 13 and 14 Are the anode lead terminals 15a, 16a and the cathode lead terminal 1 connected to the capacitor element.
5b and 16b are derived respectively. Reference numeral 17 denotes a resin case in which the two aluminum electrolytic capacitor bodies 11 and 12 are accommodated in the case 15 so that the directions are opposite. In this case, the two aluminum electrolytic capacitor bodies 11 and 12 are disposed. 12
A gap 18 is provided between the bottoms 13 of the metal cases 13 and 14.
Explosion-proof valves (not shown) provided at a and 14a operate normally. And, in the resin case 17, by the gas of the electrolytic solution released when the explosion-proof valve is operated,
Gas vent holes 19 to prevent the resin case 17 from breaking
Is provided. In addition, the two aluminum electrolytic capacitor bodies 11 and 12 are placed in opposite directions, that is,
When housed in a resin case 17 so that the bottomed portions 13a and 14a of 3 and 14 face each other with a gap 18, the metal cases 13 and 1
Anode lead terminals 1 respectively derived from one end opening of 4
5a, 16a and cathode lead terminals 15b, 16b are made of resin case 1.
7, and this anode lead terminal 1
The tips of 5a, 16a and the cathode lead terminals 15b, 16b are bent so as to be flush with the bottom surface 17a of the resin case 17, and protrude outward from the side surface of the resin case 17.
With such a configuration, when the chip-type aluminum electrolytic capacitor in one embodiment of the present invention is fixed on a printed circuit board, the anode lead terminals 15a, 16a and the cathode leads located at both ends of the resin case 17 are provided. Since the terminals 15b and 16b are soldered, the chip type aluminum electrolytic capacitor can be fixed on the printed circuit board in a stable state, thereby improving the fixing strength to the printed circuit board. . With this configuration, even if a vibration test is performed, the anode lead terminals 15a, 16a and the cathode lead terminals 15b, 16b do not bend or be cut, so that they can be mounted correctly. Things.

As is clear from the description of the above embodiments, the chip-type aluminum electrolytic capacitor of the present invention is a bottomed aluminum electrolytic capacitor in which an anode foil and a cathode foil are wound together with a separator, and a capacitor element which is impregnated with an electrolytic solution is housed. An aluminum electrolytic capacitor body having a cylindrical metal case, an anode lead terminal and a cathode lead terminal connected to the capacitor element, and a resin case housing the aluminum electrolytic capacitor body; In this case, an even number of aluminum electrolytic capacitor bodies are housed so that the anode lead terminal and the cathode lead terminal are located at both ends of the resin case. The anode case from one side of the resin case as before. The chip-type aluminum electrolytic capacitor can be fixed on the printed circuit board in a more stable state as compared with the lead terminal and the cathode lead terminal. In addition, since the lead terminal is not bent or cut even when the vibration test is performed, it can be mounted correctly.

Also, since an even number of aluminum electrolytic capacitor bodies are housed in one resin case,
A large-capacity, multi-element, chip-type aluminum electrolytic capacitor can be easily manufactured.

[Brief description of the drawings]

FIG. 1 is a perspective view of a chip type aluminum electrolytic capacitor showing one embodiment of the present invention, FIG. 2 is a sectional view of the chip type aluminum electrolytic capacitor, and FIG. 3 is a perspective view of a conventional chip type aluminum electrolytic capacitor. is there. 11,12 ... Aluminum electrolytic capacitor body, 13,14 ... Metal case, 15a, 16a ... Anode lead terminal, 15b, 16b ... Cathode lead terminal, 17 resin case.

Claims (1)

(57) [Claims] 1. An aluminum electrolytic capacitor body having a bottomed tubular metal case for winding an anode foil and a cathode foil together with a separator and accommodating a capacitor element impregnated with an electrolyte, It has an anode lead terminal and a cathode lead terminal connected thereto, and a resin case for housing the aluminum electrolytic capacitor body, and in the resin case, an even number of aluminum electrolytic capacitor bodies, an anode lead terminal and A chip type aluminum electrolytic capacitor in which a cathode lead terminal is housed so as to be positioned at both ends of a resin case.