JPS6158227A - Chip type electrolytic condenser - 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 chip type electrolytic capacitor that can be mounted on a printed circuit board by a beam flow soldering method or the like.

Conventional technology In recent years, as electrical equipment has become smaller, lighter, more dense, and more reliable, printed circuit boards have become thinner and more flexible, and metal plates with good thermal conductivity are being used. Things have started to be developed and used.

Chip components have also been developed in electronic components, and chip-type multilayer ceramic capacitors and tantalum capacitors are increasingly being used as capacitors to be attached to the above-mentioned printed circuit boards. In electrolytic capacitors, the capacitor element is impregnated with electrolyte, so the capacitor element is housed in an aluminum case and then molded and covered with resin. A double exterior has been devised.

On the other hand, as shown in FIGS. 3 and 4, the lead 2.3 of an electrolytic capacitor housed in a cylindrical metal case 5
A chip-type electrolytic capacitor has been devised in which the base is bent. 7 is a heat-resistant insulating stand. (Jitsukai 50-982
33 etc.) Problems to be Solved by the Invention The double-exposed electrolytic capacitor described above has the problems of low productivity, large external dimensions, and high cost. In addition, in the electrolytic capacitor shown in Fig. 3, the bent lead FIIA 2.3 and the metal case 5 are likely to short-circuit, and when the lead wire 2.3 is bent, stress is applied to the electrode foil through the elastic sealing member 4, causing leakage. There were problems such as increased current. Furthermore, in the conventional structure as shown in FIG. 4, the product height increases by the thickness of the heat-resistant insulating base 7, so that the elastic sealing member 4. If the thickness of the battery is made thinner, the electrolyte may leak during use at high temperatures for a long period of time, resulting in a decrease in capacity and an increase in loss, resulting in a lack of reliability.

Means for Solving the Problems The present invention solves the above-mentioned problems by inserting lead-out leads led out from the capacitor element in the same direction and having a lead terminal welded to one end into the lead insertion hole provided in the elastic sealing body. In an electrolytic capacitor, the welded part between the drawer lead and the lead terminal protrudes outward from the elastic sealing body. The chip-type electrolytic capacitor is characterized in that the protruding welded portion is buried in a through hole or notch provided in a heat-resistant insulating base, and the lead terminal is arranged on the outer surface of the heat-resistant insulating base. .

The welded part between the working lead and the lead terminal is made to protrude outward from the elastic sealing body and tightened, and the protruded welded part is buried in a through hole or notch provided in the heat-resistant insulating base,
Since the lead terminals are arranged on the outer surface of the heat-resistant insulating stand, the deformed welds do not exist inside the elastic sealing body, and the lead-out leads are tightened uniformly, resulting in a significantly improved airtightness. have

EXAMPLES Hereinafter, the present invention will be explained with reference to examples shown in FIGS. 1 and 2.

FIG. 1 is a cross-sectional view of a chiller-type electrolytic capacitor. First, lead leads 2 and 2 led out from a capacitor element 1 in the same direction.
3 is inserted into the lead insertion hole provided in the elastic sealing body 4, and is housed in the metal case 5, and the opening of the case 5 is tightened and sealed. At this time, the welded portions 2b and 3b of the solderable lead terminals 2a and 3a, which are welded to one end of each of the lead-out leads 2.3, are made to protrude outward from the elastic sealing member 4 and are tightened. Next, pre-formed PBT, PET.

The above-mentioned protruding welding parts 2b, 3b are buried in the through holes 3a, 8b or notches provided in the heat-resistant resin base 8, such as ABS, PPS, epoxy resin alumina substrate, etc. The lead terminals 2a and 3a are bent and completed. In addition, FIG. 2 shows another embodiment of a chip type electrolytic capacitor, in which a heat-resistant insulating base 9 is provided with through holes 9a, 9b or notches, and a metal plate is integrally formed on the outer surface of the through holes 9a, 9b or notches.
A conductor layer 9C19d formed by vapor deposition or printing of metal is used. In this case, the welded parts 2b and 3b are the through holes 9
The lead terminals 2a and 3a are cut at the outer surface of the heat-resistant insulating base 9 and connected to the conductor layers 9c and 9d by soldering, laser welding, etc. to complete the process.

Effects of the Invention Since the chip type electrolytic capacitor of the present invention is produced in the manner described above, the airtightness is significantly improved due to the above-mentioned effects, the thickness of the elastic sealing body 4 can be reduced, and the product can be made smaller. 2) Productivity can be significantly improved without the need for exterior packaging, and it is of great industrial and practical value.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of one embodiment of the chip-type electrolytic capacitor of the present invention, FIG. 2 is a cross-sectional view of another embodiment of the chip-type electrolytic capacitor of the present invention, and FIGS. 3 and 4 are each of the conventional chip-type electrolytic capacitors. FIG. 3 is a cross-sectional view of a different chip-type electrolytic capacitor. l: Capacitor element 2.3: Output leads 2a, 3a:
Lead terminals 2b, 3b = welded part 4: Elastic material body 5: Metal case 8.9: Heat-resistant insulating stand 8 a, 8 b
:Through hole

Claims (1)

[Claims] A drawer lead drawn out in the same direction from the capacitor element and with a lead terminal welded to one end is inserted into the lead insertion hole provided in the elastic sealing body, housed in a cylindrical metal case, and the opening of the case is tightened to seal it. In the electrolytic capacitor, the welded portion between the drawer lead and the lead terminal is made to protrude outward from the elastic sealing body and tightened, and the protruded welded portion is inserted into the through hole or notch provided in the heat-resistant insulating base. A chip-type electrolytic capacitor characterized in that the lead terminals are embedded and arranged on the outer surface of a heat-resistant insulating stand.