JPH0774063A - Electrolytic capacitor - Google Patents

Abstract

PURPOSE:To prevent the vibration of a capacitor element due to signal current by a fixing material which is obtained by adding a specific amount of silk or floss to polypropylene consisting of at least one type of each structure of atactic, isotactic, and stereo of polypropylene. CONSTITUTION:An acoustic alumina electrolytic capacitor is obtained by housing a capacitor element 3 within a closed-end cylindrical alumina armor case 2 and by sealing the opening of the armor case 2 with a sealing body 4. The capacitor element 3 is constituted by winding an anode foil and a cathode foil which were subjected to etching and formation via a separator, fixing them with a tape 5, and impregnating electrolyte. A fixing agent 6 which is obtained by adding 0.1-20wt.% silk or floss to polypropylene consisting of at least one type out of each structure of atactic, isotactic, and stereo between the capacitor element 3 and the armor case 2 is filled, and the capacitor element 3 is fixed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a material for fixing an element of an electrolytic capacitor to an outer case.

[0002]

2. Description of the Related Art Acoustic electrolytic capacitors are widely used for smoothing power supplies and coupling in audio equipment applications. As an example, a JIS standard 69-type aluminum electrolytic capacitor 1 is configured by housing a capacitor element 3 in an aluminum outer case 2 having a bottomed cylindrical shape as shown in FIG. 1, and the opening of the outer case 2 is sealed. It is sealed by the body 4. The capacitor element 3 is formed by winding an etched and formed anode foil and cathode foil with a separator interposed therebetween, fixing the tape 5 with a tape 5, and impregnating the electrolytic solution. Between the capacitor element 3 and the outer case 2, the capacitor element 3
A fixing agent 6 is filled for the purpose of fixing.

[0003]

The electrolytic capacitor for acoustic use is required to reproduce a signal with high sound quality. However, when the acoustic condenser is mounted on an audio device or the like,
Excellent reproduction cannot be obtained because distortion components are added in the transmission of audio signals and the power supply of the power supply smoothing unit due to vibrations generated from the outside such as motors and transformers, and minute vibrations generated from the capacitor element 3 itself. Had a problem.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and provide an electrolytic capacitor having excellent sound quality characteristics. Based on the finding that excellent sound quality characteristics are not obtained due to the slight vibration generated by the change of electric charge when the signal current flows through the capacitor element and the mechanical vibration received from the outside, The vibration is prevented by improving. In the present invention, in the aluminum electrolytic capacitor in which the capacitor element is fixed in the outer case by the fixing agent, the fixing agent is formed by adding 0.1 to 20 wt% of silk or cotton to polypropylene having an atactic structure or the like. If it is less than 0.1 wt%, the effect of improving the sound quality is not seen, and if it is 20 wt% or more, the function as a fixing agent cannot be achieved. The length of the silk fiber is preferably about 0.03 mm to 10 mm, but an effect of improving sound quality was obtained even if the length was outside this range.

That is, the present invention relates to an acoustic aluminum electrolytic capacitor in which a capacitor element is fixed in the outer case by a fixing material, and in an acoustic aluminum electrolytic capacitor in which a capacitor element having an atactic structure is fixed in the outer case, Acoustic aluminum characterized by using a fixing material made by adding 0.1 to 20 wt% of silk or cotton to polypropylene made of at least one of polypropylene having an atactic structure, polypropylene having an isotactic structure, and polypropylene having a stereo structure. It is an electrolytic capacitor.

[0006]

Embodiments of the present invention will be described below with reference to FIGS. In FIG. 1, J used for smoothing the power source
The IS standard 69-type aluminum electrolytic capacitor for acoustics 1
The capacitor element 3 is housed in an aluminum outer case 2 having a bottomed cylinder, and the opening of the outer case 2 is sealed by a sealing body 4. The capacitor element 3 is formed by winding an anode foil and a cathode foil, which have been etched and formed, through a separator, fixing them with a tape 5, and impregnating them with an electrolytic solution. Between the capacitor element 3 and the outer case 2, a fixing agent 6 made by adding silk or cotton to atactic polypropylene for the purpose of fixing the capacitor element 3.
Is filled.

FIG. 2 shows another type of acoustic aluminum electrolytic capacitor 21, which is a JIS standard 04 type electrolytic electrolytic capacitor, in which a capacitor element 23 is placed in an aluminum outer case 22 having a bottom. Be stored,
The opening of the outer case 22 is sealed by a sealing body 24. The capacitor element 23 is formed by winding an etched and formed anode foil and cathode foil through a separator, fixing them with a tape 25, and impregnating them with an electrolytic solution. Between the capacitor element 23 and the outer case 22, the capacitor element 2
For the purpose of fixing No. 3, a fixing agent 26 made by adding silk or cotton to atactic polypropylene is filled.

In the two types of acoustic aluminum electrolytic capacitors shown in FIGS. 1 and 2, the amount of silk fiber added in the fixative and the length of silk fiber were changed to give examples as shown in Table 1. Aluminum electrolytic capacitors 1 to 4 for acoustics were manufactured.
That is, Examples 1 and 2 are 69 type acoustic aluminum electrolytic capacitors having the structure of FIG.
F, outer dimension diameter 50 mm, length 100 mm. Further, Examples 3 to 4 are 04 type acoustic aluminum electrolytic capacitors having the structure of FIG.
The outer dimensions are 18 mm in diameter and 35.5 mm in length. As Comparative Examples 1 and 2, an acoustic aluminum electrolytic capacitor of the type shown in FIGS. 1 and 2 having the same rating and the same external dimensions and having no silk fiber added to the fixative was manufactured.

[0009]

[Table 1]

Each of the acoustic aluminum electrolytic capacitors of Examples 1 and 2 and Comparative Example 1 was mounted on the power smoothing part of the power amplifier,
In addition, Table 2 shows the results of each of the aluminum electrolytic capacitors for acoustics of Examples 3 to 4 and Comparative Example 2 used as a coupling capacitor for a signal system, each of which was auditioned and evaluated by a 10-point system. The higher the number, the better the score.

[0011]

[Table 2]

As a result of the listening test, Examples 1 to 4 of the present invention are
All were evaluated better than the comparative examples, demonstrating that the sound quality was significantly improved over the conventional fixative. Although polypropylene having an atactic structure is used in the present invention, isotactic polypropylene, one using each polypropylene having a stereoblock structure, one containing one or more of them, or containing cotton in place of silk The same effect was obtained in the sample.

[0013]

According to the present invention, in the acoustic aluminum electrolytic capacitor in which the capacitor element is fixed in the outer case by the fixing agent, 0.1 to 20 wt.
The use of a fixing agent containing 100% of silk or cotton can greatly contribute to the improvement of the sound quality of audio equipment.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of an electrolytic capacitor of the present invention.

FIG. 2 is a sectional view of another embodiment of the electrolytic capacitor of the present invention.

[Explanation of symbols]

 1 Aluminum Electrolytic Capacitor 2 Exterior Case 3 Capacitor Element 4 Sealing Body 5 Tape 6 Fixing Agent 21 Aluminum Electrolytic Capacitor 22 Exterior Case 23 Capacitor Element 24 Sealing Body 25 Tape 26 Fixing Agent

Claims (1)

[Claims] 1. An electrolytic capacitor in which a capacitor element is fixed in an outer case by a fixing material, wherein 0.1 to 20 wt% of polypropylene having at least one of polypropylene having an atactic structure, polypropylene having an isotactic structure, and polypropylene having a stereo structure.
% An electrolytic capacitor characterized by using a fixing material to which silk or cotton is added.