JPS605570Y2 - Electrolytic capacitor - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a wound type electrolytic capacitor, and is particularly aimed at exhibiting excellent characteristics when used in audio equipment.

Improvements in sound quality in recent audio equipment are strongly required not only in circuits and active elements, but also in passive elements such as capacitors.

This invention aims to improve the sound quality of electrolytic capacitors.

Generally, as shown in Fig. 1, electrolytic capacitors have a band-shaped anode electrode foil 1 and a cathode electrode foil 2 made of a valve metal such as aluminum, whose surfaces are subjected to treatments such as etching or skinning.
The electrode pull-out tabs 3,
Connect 4 by stitching, cold welding, etc.
Winding the electrode foils 1 and 2 with a separator paper 5 interposed between them,
After making the capacitor element 6 and impregnating it with electrolyte, connect the electrode pull-out tab 3゜4 to the terminal connection part 8 of the sealed terminal plate 7, enclose the capacitor element 6 in the capacitor case 9, and connect the capacitor element 6 with the sealed terminal plate 7. The open end of the capacitor case 9 is sealed.

The arrangement of the electrode pull-out tabs 3.4 in the capacitor element 6 is as shown in FIGS. There is.

When an alternating current such as an acoustic signal is applied to this capacitor element 6, a current flows in the opposite direction between the facing electrode foils 1 and 2 as shown by the arrow in the figure, and the capacitor element 6
Although the inductance can be canceled out, a back electromotive force due to the proximity effect occurs in the facing electrode foil 1.2, and the equivalent series resistance of the electrode foil increases.

On the other hand, as shown in Figure 3 a and b, only one or two of the three sets of electrode pull-out tabs 3 and 4 (marked with ○ in the figure)
When using electrode foils 1 and 2 facing each other, the direction of current flowing between electrode foils 1 and 2 increases in the same direction, reducing the effect of canceling the inductance, but conversely, the equivalent series resistance of the electrode foils due to the proximity effect decreases.

By changing the position or number of the electrode pull-out tabs 3 and 4 in this way, static characteristics such as capacitance do not change, but responses to changes in acoustic signals etc. differ, and differences in sound quality also appear.

Distinguishing the difference in sound quality does not necessarily mean which is better; it is difficult to quantitatively distinguish with a measuring instrument because it involves subjective factors, and the discrimination is mainly made by listening to the sample.

Furthermore, it is necessary to manufacture many types of capacitor elements with different specifications to meet various sound quality requirements, which has the disadvantage of complicating work and management and increasing costs.

The present invention is an improvement on this point, and allows various required sound qualities to be obtained by using a capacitor element made to one type of specification.

The structure of the electrolytic capacitor of the present invention is as shown in FIG. Cut or bend the remaining unnecessary electrode pull-out tabs 10 and 11 using a chisel (all of them may be used), and then remove the selected electrode pull-out tabs 3 and 4 from the terminal connecting portion 8 of the sealed terminal board 7. The capacitor case 9 is sealed with a sealed terminal plate 7 at the open end of the capacitor case 9.

The electrolytic capacitor of the present invention is characterized in that only the necessary tabs from among the plurality of electrode pull-out tabs pulled out in advance from the capacitor element are connected to the terminal connection part of the sealed terminal board, thereby allowing the facing electrode foils to Various conditions can be created by selecting the position and number of electrode tabs, such as the direction of current flowing in the same direction, the opposite direction, or both, and electrolytic capacitors with corresponding sound quality can be obtained. be able to.

According to the present invention, it is possible to meet various sound quality requirements with a single capacitor element, so there is no need to make capacitor elements with various specifications as in the past, which simplifies work and management, which is useful for manufacturing electrolytic capacitors. It is something.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the internal structure of a conventional electrolytic capacitor, Figs. FIG. 2 is a perspective view showing the internal structure of an electrolytic capacitor. 1... Anode electrode foil, 2... Cathode electrode foil, 3, 4... Electrode drawer tab, 5...
Separator paper, 6... Capacitor element, 7...
...Sealing terminal board, end...Terminal connection part, 9...
...Capacitor case, 10.11...Unnecessary electrode pull-out tab.

Claims (1)

[Scope of utility model registration request] Connect the electrode pull-out tabs to the anode and cathode electrode foils, impregnate the wound capacitor element with separator paper between the electrode foils with an electrolytic solution, and connect the electrode pull-out tabs to the terminal connections of the sealed terminal board. In an electrolytic capacitor sealed in a case, electrode pull-out tabs are connected to all usable positions of the anode and cathode electrodes, and one or two electrode pull-out tabs selected from these plurality of electrode pull-out tabs are connected in advance to all usable positions of the anode and cathode electrodes. An electrolytic electrolytic device characterized in that only one or more electrode pull-out tabs are connected to the terminal connection part of the sealed terminal board, and the other electrode pull-out tabs are not electrically connected to the terminal connection part by bending or cutting and removing them. capacitor.