JPS605573Y2 - Wound electrolytic capacitor - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a wound electrolytic capacitor with an improved terminal connection structure.

As shown in FIGS. 1 and 2, conventional wound electrolytic capacitors have an anode electrode foil and a cathode electrode foil wound through electrolytic paper, and the internal terminal 1 is connected to the electrode foil by caulking, welding, etc.
, 1 are connected to form a capacitor element 2, which is impregnated with an electrolyte.

Next, the external terminals 3, 3 previously embedded in the sealing body 4, such as a resin, and the internal terminals 1, 1 are connected by caulking, welding, etc., and the capacitor element 2 is housed in the container.

Reference numeral 5 designates an upper welding electrode for connecting the internal terminals 1, 1 and external terminals 3, 3, respectively, and 6 designates a lower welding electrode.

Since the connection portion between the internal terminals 1, 1 and the electrode foil of the wound electrolytic capacitor configured as described above is formed in a flat shape, the internal terminals 1, 1 led out from the capacitor element 2 are shown in FIG. As shown in FIG. 2, the flat surfaces 1a face each other.

Therefore, when welding the external terminal 3.3 and the internal terminals 1, 1, it is difficult to weld two places at the same time, and it is necessary to weld one side of the external terminal 3 and the internal terminal 1, which takes a lot of man-hours. It had drawbacks such as being difficult to use.

The present invention eliminates the above-mentioned drawbacks and is a wound type electrolytic capacitor that can be easily automatically welded without increasing the number of parts.

Hereinafter, the present invention will be described with reference to embodiments shown in FIGS. 3 to 8.

3 and 4 show the actual welding process of internal terminals 8, 8 derived from capacitor element 7 and external terminals 9, 9 embedded in sealing body 10. 11 is an upper electrode for welding, and 12 is a lower electrode for welding. It is.

In this case, the internal terminals 8, 8 are twisted at right angles at the roots derived from the capacitor element 7, and the surfaces where the external terminals 9 and internal terminals 8 connect are at right angles to the surface where the electrode foil and the internal terminal 8 are connected. It is configured as follows.

That is, the connection surfaces of the internal terminals 8, 8 and the external terminals 9.9 are configured to be on the same plane.

This right-angled screw bending of the internal terminal 8 may be formed either before or after the capacitor element 7 is wound.

Therefore, since the connection surfaces of internal terminals 8, 8 and external terminals 9, 9 are configured to be on the same plane, it is easy to weld two places at the same time, and two or more internal terminals and external terminals can be welded at the same time. Welding can be done in the same way even with the provided one.

This shortens the assembly work time, facilitates automation, and is particularly effective for products with narrow terminal spacing and products with a large number of terminals.

5, 6 and 7 show other embodiments of the internal terminal, in which the surface 8b connected to the electrode foil is the surface 8b connected to the external terminal 9.
It is formed by twisting each other at right angles to a,
As described above, there is an effect that the external terminal 9 and the internal terminal 8 can be welded in the direction of the arrow as shown in FIG.

13 is a container for a capacitor.

As mentioned above, the wound type electrolytic capacitor of the present invention connects the external terminal embedded in the sealing body to the internal terminal led out from the capacitor element, and the capacitor element is housed in the container. It is constructed by twisting the internal terminals at almost right angles so that the connection surfaces of the internal terminals are on the same plane, which is extremely advantageous in terms of mass production efficiency and has great practical value.

[Brief explanation of drawings]

Figure 1 is a plan view of a conventional electrolytic capacitor element, Figure 2 is an explanatory diagram of a conventional electrolytic capacitor being assembled, Figures 3 to 8 are examples of the present invention, and Figure 3 is an illustration of an electrolytic capacitor. FIG. 4 is an explanatory diagram of the electrolytic capacitor during assembly; FIGS. 5 to 7 are perspective views of internal terminals of the electrolytic capacitor; and FIG. 8 is a sectional view of the electrolytic capacitor. 7...Capacitor element, 8...Internal terminal, 8a, 8b...Connection surface, 9...External terminal, 1o...Sealing Body, 13... Container.

Claims (1)

[Scope of utility model registration request] In a wound type electrolytic capacitor in which an external terminal embedded in a sealing body is connected to an internal terminal led out from a capacitor element, and the capacitor element is housed in a container, the external terminal is connected to the insertion surface into the capacitor element. A wound type electrolytic capacitor characterized by using internal terminals whose connection surfaces are twisted at almost right angles.