JPH1140466A - Al electrolytic capacitor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid the sound quality deterioration due to the signal deterioration by mounting a cylindrical magnetic body formed with conductive linear or conductive plate-like segments spirally disposed therein on the outer side face of a closed-end metal case. SOLUTION: A capacitor element 11 is composed of an anode foil made by roughening a valve-acting metal foil and forming a dielectric film by the anodic oxidation, cathode foil made by roughening an Al foil; the anode and cathode foils being wound with a separator inserted therebetween. The element 11 is impregnated with a driving electrolyte and put in a closed-end cylindrical Al metal case 12 having openings sealed with seals 13 on which an anode and cathode outer terminals 14a, 14b are mounted and connected to leads connected to the anode and cathode foils. A cylindrical magnetic body formed with conductive linear segments 16 spirally disposed therein covers the outer side face of the closed-end metal case 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aluminum electrolytic capacitor used for audio electronic equipment.

[0002]

2. Description of the Related Art As shown in FIG. 2, a conventional aluminum electrolytic capacitor of this type has an anode foil formed by roughening a valve metal foil and further forming a dielectric film by anodic oxidation and a cathode formed by roughening an aluminum foil. The capacitor element 1 is formed by winding a foil with a separator interposed therebetween, and the capacitor element 1 is impregnated with a driving electrolyte, and then housed in a bottomed cylindrical metal case 2. The sealing member 3 is sealed in the opening of the metal case 2 so that the internal driving electrolyte does not evaporate.

[0003]

In recent years, there has been a growing demand in the market for high quality sound of aluminum electrolytic capacitors in accordance with the trend toward higher sound quality of audio electronic equipment.

However, when the above-mentioned conventional aluminum electrolytic capacitor is mounted on an electronic device for sound and used,
The lines of magnetic force generated from the aluminum electrolytic capacitor itself generate eddy currents on the surface of the metal case 2 although they are minute, and the eddy currents cause signal deterioration in equipment for transmitting music signals, leading to sound quality deterioration. Was.

The present invention solves the above-mentioned conventional problems. When the present invention is mounted on an acoustic electronic device and used, it is affected by magnetic lines generated from the aluminum electrolytic capacitor itself or magnetic lines generated from an external power transformer. An object of the present invention is to provide an aluminum electrolytic capacitor capable of preventing sound quality deterioration and realizing high-quality music reproduction.

[0006]

In order to achieve the above object, an aluminum electrolytic capacitor according to the present invention comprises: a capacitor element formed by winding an anode foil and a cathode foil with a separator interposed therebetween; A driving electrolyte to be impregnated in the capacitor element, a bottomed metal case for housing the capacitor element, and a sealing body for closing an opening of the bottomed metal case, an outer surface of the bottomed metal case. A cylindrical magnetic body that is formed by integrally arranging a conductive linear body or a conductive plate-like body in a spiral shape is mounted. According to this configuration, it is mounted on an electronic device for sound. When used, it can prevent sound quality deterioration due to the influence of magnetic field lines generated from the aluminum electrolytic capacitor itself or magnetic field lines generated from an external power transformer, etc., and realize high-quality music playback A.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The invention according to claim 1 of the present invention provides a capacitor element formed by winding an anode foil and a cathode foil with a separator interposed therebetween, and impregnating the capacitor element. A driving electrolytic solution, a bottomed metal case for accommodating the capacitor element, and a sealing body for closing an opening of the bottomed metal case, and a conductive linear body on an outer surface of the bottomed metal case. Alternatively, a cylindrical magnetic body formed by integrally arranging a conductive plate-like body inside in a spiral shape is mounted. According to this configuration, the conductive plate-like body is spirally arranged inside the cylindrical magnetic body. Since the conductive wire or conductive plate that emits magnetic lines of force, the lines of magnetic force generated from the aluminum electrolytic capacitor itself generate eddy currents, and the eddy currents cause signal degradation in equipment that transmits music signals. In addition, since magnetic lines of force generated from an external power transformer or the like are also canceled out by magnetic lines of force generated by the conductive linear body or the conductive plate-like body, sound quality deterioration due to the signal deterioration can be prevented and high sound quality can be prevented. Music reproduction can be realized.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a partially cutaway front view of an aluminum electrolytic capacitor according to an embodiment of the present invention. In FIG. 1, reference numeral 11 denotes a capacitor element. Further, an anode foil having a dielectric film formed by anodic oxidation,
The cathode foil obtained by roughening the aluminum foil is wound with a separator interposed therebetween.

After the capacitor element 11 is impregnated with a driving electrolyte, it is housed in a bottomed cylindrical metal case 12 made of aluminum. Reference numeral 13 denotes a sealing body that is sealed in the opening of the bottomed metal case 12 so that the internal driving electrolyte does not evaporate. The sealing body 13 has an anode-side external terminal 14a and a cathode-side external terminal 14b attached thereto. ,
The anode-side external terminal 14a and the cathode-side external terminal 14
In b, a lead member connected to the anode foil and the cathode foil is connected.

Reference numeral 15 denotes a cylindrical magnetic body formed by integrally arranging a conductive linear body 16 made of a conductive material such as copper in a spiral shape, and the cylindrical magnetic body 15 has a bottom. It is mounted on the outer surface of the metal case 12 and covers the outer surface of the bottomed metal case 12.

In the above-described embodiment of the present invention, the conductive linear member 16 made of a conductive material such as copper is spirally arranged inside the cylindrical magnetic member 15 and integrally formed. Therefore, the helical conductive linear body 16 emits magnetic lines of force, and the magnetic lines of force generated from the aluminum electrolytic capacitor itself are canceled by the magnetic lines of magnetic force. The eddy current does not cause signal degradation in a device that transmits a music signal by generating an eddy current, thereby preventing sound quality degradation due to the signal degradation.

Further, magnetic lines of force generated from an external power transformer or the like are also canceled by the magnetic lines of force generated by the spiral conductive linear body 16, so that the generation of eddy current due to the lines of magnetic force is eliminated, thereby causing signal deterioration. Therefore, it is possible to prevent sound quality deterioration due to the signal deterioration.

[0013] Table 1 shows a self-standing aluminum electrolytic capacitor for smoothing the power supply of an ordinary audio amplifier for a conventional aluminum electrolytic capacitor (conventional product) and an aluminum electrolytic capacitor (product of the present invention) according to an embodiment of the present invention. This shows the result of a sound quality study performed using a capacitor 56V8200 μF.

[0014]

[Table 1]

As is clear from Table 1, the product of the present invention has improved sound sensation, sound field sensation, and sound quality in the middle and high ranges as compared with the conventional product. There was also a sense of volume in low frequencies.

Table 2 shows the frequency points of a conventional aluminum electrolytic capacitor (conventional product) and an aluminum electrolytic capacitor according to one embodiment of the present invention (product of the present invention) using a YHP impedance analyzer. 5 shows the results of measuring the impedance at.

[0017]

[Table 2]

As is clear from Table 2, the product of the present invention can lower the impedance in a high frequency range of 10 MHz as compared with the conventional product.

In the above-described embodiment of the present invention, the anode external terminal 14a and the cathode external terminal 14b attached to the sealing body 13 are connected to a lead member connected to the anode foil and the cathode foil. Although the present invention is applied to the aluminum electrolytic capacitor described above, the present invention can also be applied to an aluminum electrolytic capacitor having a structure in which the lead wires connected to the anode foil and the cathode foil are penetrated through the sealing body and pulled out to the outside. Things.

In the above-described embodiment of the present invention, a conductive linear member 16 made of a conductive material such as copper is spirally arranged inside a cylindrical magnetic member 15 and integrally formed. Although described, even if it replaces with the conductive linear body 16 and arrange | positions the conductive plate-shaped body which consists of conductive materials, such as copper, spirally inside the cylindrical magnetic body 15, it may be made to integrally mold. It has the same effect as the embodiment of the present invention.

[0021]

As described above, the aluminum electrolytic capacitor of the present invention has a capacitor element formed by winding an anode foil and a cathode foil with a separator interposed therebetween,
A driving electrolytic solution impregnated in the capacitor element, a bottomed metal case for housing the capacitor element, and a sealing body for closing an opening of the bottomed metal case, and an outer surface of the bottomed metal case. A cylindrical magnetic body formed by integrally arranging a conductive linear body or a conductive plate-like body in a helical shape inside, and according to this configuration, the cylindrical magnetic body Magnetic lines of magnetic force are generated by the aluminum electrolytic capacitor itself, because the conductive linear body or conductive plate-like body spirally arranged inside emits magnetic lines of force. The lines of magnetic force generated are also canceled by the lines of magnetic force generated by the conductive linear body or the conductive plate-like body, and as a result, the magnetic lines of force generated from the aluminum electrolytic capacitor itself as in the past Lines of magnetic force generated from an external power transformer or the like do not generate eddy currents, and the eddy currents do not cause signal deterioration in a device transmitting a music signal. Music reproduction can be realized.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of an aluminum electrolytic capacitor according to an embodiment of the present invention.

FIG. 2 is a partially cutaway front view showing a conventional aluminum electrolytic capacitor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Capacitor element 12 Metal case with bottom 13 Sealing body 15 Cylindrical magnetic body 16 Conductive linear body

Claims (1)

[Claims] 1. A capacitor element formed by winding an anode foil and a cathode foil with a separator interposed therebetween, a driving electrolyte impregnated in the capacitor element, and a housing for accommodating the capacitor element. A bottom metal case,
A sealing body for closing the opening of the bottomed metal case, and a conductive linear body or a conductive plate-shaped body is helically disposed inside the outer surface of the bottomed metal case and integrally molded. Aluminum electrolytic capacitor equipped with a cylindrical magnetic material.