JPH01175221A - Chip type aluminum electrolytic capacitor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a leadless type chip-type aluminum electrolytic capacitor.

Conventional technology Conventional chip-type aluminum electrolytic capacitors are shown in Figure 4 a and b.
The configuration was as shown in . That is, an anode foil made of roughened aluminum foil and a dielectric film formed by anodization, and a cathode foil made of roughened aluminum foil are wound through a separator and impregnated with a driving electrolyte to form a capacitor element. 1, this capacitor element 1 is housed in a metal case 2, and sealed using an elastic sealing body 3 such as rubber to constitute an aluminum electrolytic capacitor body, and the capacitor element 1 is drawn out from the capacitor element 1. The lead wire 4 was electrically and mechanically connected to the comb-shaped terminal 7 by a method such as welding, and the entire body except the comb-shaped terminal 7 was provided with a resin mold outside device to obtain a completed product.

Problems to be Solved by the Invention These chip-type aluminum electrolytic capacitors are provided with a resin molded exterior as described above, but in general, resin molded exteriors are heated at a temperature of 10 to 160°C for about 10 kg/kg for 6 minutes. Under such harsh conditions, the driving electrolyte evaporates, resulting in deterioration of characteristics such as a decrease in capacitance and an increase in tan δ. Therefore, it was impossible to provide the product at a low price.

The present invention solves these problems, and aims to provide a chip-type aluminum electrolytic capacitor with excellent characteristics at a low cost.

Means for Solving the Problems In order to solve this problem, the present invention is constructed by housing a capacitor element in a case and sealing it using a sealing body, and a lead wire connected to the capacitor element. The capacitor body is made up of a capacitor body that is drawn out from the same end face, and an insulator that fixes the capacitor body in a horizontal position. A recess connected to the notch is provided on the outer surface, and the tip of a lead wire passing through the notch is bent so as to fit within the recess.

Effects According to the present invention, chip-type aluminum electrolytic capacitors can be manufactured at low cost without causing characteristic deterioration due to the resin molded exterior, and since the tip of the lead wire is housed in the recess provided in the insulator, insulation is improved. Since there are no protrusions on the surface of the body that contacts the printed circuit board, that is, the lead wire is in a so-called tangential position with the insulator, there is no tilting or wobbling of the capacitor, making the mounting process extremely easy and speedy. It becomes possible.

EXAMPLE Hereinafter, an example of the present invention will be explained using the drawings of FIGS. 1 to 3. In addition, in the figure, the same parts as in FIG. 4 are given the same numbers.

In the figure, 1 is a capacitor element, which consists of an anode foil made by electrochemically roughening high-purity aluminum foil and then anodizing it to form a dielectric film, and a roughened cathode aluminum foil. is wound through an insulating paper, and the wound material is impregnated with a driving electrolyte. This capacitor element 1 is housed in a metal case 2 and sealed with a sealing body 3 made of sealing rubber, etc. A lead wire 4 is connected to the anode foil and cathode foil of the capacitor element 1 and passes through the sealing body 3. and is drawn out from the same end surface. 6
is an insulator that fixes the capacitor body horizontally,
This insulator 6 is provided with a notch 6a through which the lead wire 4 passes. Further, a recess 5b connected to the notch 6& is provided on the outer surface of the insulator 6, and the tip of the lead wire 4 passing through the notch 6& is bent so as to fit into the recess 6b. ing.

In this case, the tip end 4& of the lead wire 4 is as shown in FIG. 3a.

The lead wire may be flattened and bent as shown in b, or it may be a round bar lead wire as it is.

Further, in order to improve the efficiency of the mounting work, a dummy lead wire 6 may be placed on the opposite side of the lead wire 40, or a chamfered portion 5c may be provided on the insulator 6 for the purpose of indicating polarity.

Effects of the Invention As described above, according to the present invention, a chip-type aluminum electrolytic capacitor can be manufactured at low cost without causing characteristic deterioration due to the resin molded exterior, and the tip of the lead wire can be inserted into the recess formed in the insulator. Because it is stored, there are no protrusions on the surface of the insulator that contacts the printed circuit board, that is, the lead wire is in a so-called angular position with the insulator.
There is no tilting or wobbling of the capacitor, making the mounting work extremely easy and faster.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a chip-type aluminum electrolytic capacitor according to an embodiment of the invention, FIG. 2 a is a sectional view of the same, FIG. Figure 3a,
b is a perspective view showing the lead shape of the same capacitor, Fig. 4a
, b are a cross-sectional view and a side view showing a conventional chip-type aluminum electrolytic capacitor. 1... Capacitor element, 2... Metal case, 3... Sealing body, 4... Lead wire,
4 &... tip, 6... insulator, 6a
...Notch, 6b...Concave, 5C
... Chamfered part, 6 ... Dummy lead wire. Name of agent: Patent attorney Toshio Nakao and 1 other person2-
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Claims (2)

[Claims] (1) A capacitor body constructed by housing a capacitor element in a metal case and sealing the metal case using a sealing body, and having a lead wire connected to the capacitor element pulled out from the same end face, and this capacitor It consists of an insulator that fixes the main body in a horizontal position,
A notch is provided in the insulator through which the lead wire of the capacitor body passes, and a recess is provided in the outer surface of the insulator that connects to the notch, and the tip of the lead wire that has passed through the notch is completely inserted into the insulator. A chip-type aluminum electrolytic capacitor characterized by being bent to fit within the recess. (2) The chip-type aluminum electrolytic capacitor according to claim 1, wherein the tip of the lead wire accommodated in the recess is plate-shaped.