JPS6012719A - 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 The present invention relates to an electrolytic capacitor using an elastic sealing body which is vulcanized and molded by blending ceramic powder into the elastic sealing body.

Conventionally, electrolytic capacitors are constructed by winding an anode foil, a cathode foil, and a separator to form an element, impregnated with electrolyte, and then assembled with an elastic sealing body through which an electrode lead wire is inserted and a metal case made of aluminum, etc. The elastic sealing body is made of natural rubber, S
In addition to rubber base materials such as BR and EPR, vulcanizing agents, accelerators, fillers, reinforcing agents, etc. were co-fired and vulcanization molded. When an electrolytic capacitor using this elastic seal is mounted on a printed circuit board, depending on the application, for example, an audio amplifier chassis may be shaken by sound pressure or vibration, or the printed circuit board may be shaken directly by sound pressure. There is also. Due to these causes, the printed circuit board vibrates, and the mounted electrolytic capacitor also vibrates as shown in Figure 1.

That is, in Fig. 1, (a) is a structural cross-sectional view, (1) is a tab terminal,
(2) is the sealing rubber, Figure (b) is a side view of Figure (a), and (3) is the lead wire, which is connected to the element at the part (4) where it tilts due to vibration and the swing angle Q of the capacitor. Become. There are also cases where only the printed circuit board vibrates without the electrolytic capacitor shaking much. In either case, force is applied to the connection part with the foil through the tab terminal (1) from the lead wire (3), and the method of tightening the separator paper impregnated with electrolyte is changed, and the electrolysis shown in Fig. 2 is performed. The resistance values Re and Rf in the circuit diagram of the capacitor are changed. In Figure 2, Re is the resistance of the electrolyte and separator paper, and Rf is the film resistance.

L is the inductance due to the winding structure of the capacitor and the extraction electrode, D is the polarity of the film, C+ is the capacitance of the anodic oxide film, C- is the capacitance of the natural air oxide film at the cathode, and the fluctuation of the capacitor is shown in Figure 1. In the internal structure of the electrolytic capacitor, this occurs at the joint between the tab terminal (1) and the foil (5). It is necessary to reduce the shaking at the joints. Conventional elastic sealing bodies did not have sufficient holding force.

In the present invention, in order to increase this holding force, AIL♂OA, Bed, M
The improvement was successfully achieved by adding ceramic powder of BO, BaTiO3°S r'T i O3. The elastic sealing body molded by adding this ceramic powder has a large equivalent spring constant, and can greatly increase the holding force of the tab terminal when caulked with an aluminum case. This determines the swing angle of the capacitor (
Q) in Fig. 1 can be changed to the inclination of the lead wire instead of the joint between the tab terminal and the foil. Therefore, the force applied to the separator paper can be reduced, and Re and Rf in FIG. 2 are less likely to change, resulting in a capacitor that is less susceptible to vibrations. Recently, emphasis has been placed on the sound quality of electrolytic capacitors, and the electrolytic capacitor using the elastic sealing body of the present invention obtained good results in listening tests, and was found to contribute to improving sound quality.

Example 1) The present invention was applied to an electrolytic capacitor of type 04 25V-100.
Regarding OJJF, the size is 16 mm in diameter and 31.5 mm in length, and the anode box, cathode foil, and separator cut into limited lengths are rolled up to create an element, which is then impregnated with electrolyte and dehydrated. As shown in FIG. 1, a lead wire (3) is passed through an elastic sealing body (2) of the present invention containing ceramic powder, and the element is integrated with the element, housed in an aluminum case (6), and the sealing body portion is caulked and sealed. After that, a voltage is applied to complete the aging process and the product is completed. Table 1 shows a comparison of the characteristics of the finished product of the present invention with that of a conventional elastic sealant.

Table 1 Combination example (WT$) (1mV is OdB) The output noise level was measured as a characteristic.
Add vibration to 51 (Z~5KH2, 0, 5G output,
Measure capacitor noise. C is the test capacitor S
G is an oscillator, R is a resistor, and A is a spectrum analyzer.

2) If ceramic is blended with polyacid in the elastic sealing body of the present invention, the holding force will increase, but the elasticity will be reduced. Similar effects can be expected by adopting a two-layer or three-layer structure to compensate for this drawback.

FIG. 3(a) shows a two-layer sealing body, in which the elastic body (7) containing ceramic powder according to the present invention is the second layer, and the conventional elastic body (8) is the lower layer. FIG. 3(b) shows a three-layer structure in which the upper and lower layers (7) are made of the elastic material of the present invention, and the middle layer (8) is made of a conventional elastic material. The manufacturing method is to create each elastic body separately, place them one on top of the other, and simultaneously vulcanize them to complete the product.

[Brief explanation of the drawing]

Figure 1 (a) is a structural diagram of an electrolytic capacitor, (b) is a diagram showing a vibrating state, Figure 2 is an equivalent circuit diagram of an electrolytic capacitor,
FIG. 3(a) shows the two-layer sealing elastic body of the present invention. Figure 3(b)
shows a three-layer oral elastic body of the present invention. FIG. 4 is a circuit diagram for measuring vibration of an electrolytic capacitor. Patent Applicant Elnor Co., Ltd. Yume 2 l Ka 52 Sho 4 Ma 1958 De/Mon/Q Sun Secretary of State Display of Patent Application No. 24349 of 1988 2 Name of Invention Relationship with Person Who Corrects Electrolytic Capacitors Case Representative Patent applicant address: 2-2-1 Tsujido Shinmachi, Fujisawa City, Kanagawa Prefecture, Showa 5
August 10, 1998 (Delivery date: August 30) King's subject 6, content of amendment In the order r A brief explanation of the drawing of Figure 1, (0 Figure 1 is one figure)'' However, this is from 1937.
Patent application 58 filed simultaneously as application (1) on February 16, 2008
-24348 was mistakenly attached to the water bulge in the application, so I hereby submit one official drawing of the original application.

Claims (1)

[Scope of Claims] (1) An electrolytic capacitor using an elastic sealing body which is vulcanized by blending ceramic powder in addition to natural rubber, synthetic rubber, etc. as a compounding material for the elastic sealing body (2) (1) Al2O5゜B as a ceramic powder of
Electrolytic capacitor (3) using an elastic sealing body containing a member of eO, MB-0, BaTi0g, 5rTioa, etc. Electrolytic capacitor using an elastic sealant (4) An electrolytic capacitor using an elastic sealant consisting of two or three or more layers of the elastic sealant of (1) and a sealant not containing ceramic powder alternately. capacitor