JPH10312938A - Aluminum electrolytic capacitor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an aluminum electrolytic capacitor which can reproduce high-tone quality music by preventing the deterioration of tone quality of the music, caused by the magnetic lines, of force generated from the capacitor itself or from an external power transformer. SOLUTION: In an aluminum electrolytic capacitor which is provided with a capacitor element 11, constituted by rolling up an anode foil and a cathode foil with a separator in between, an electrolytic solution for driving impregnated into the element 11, a bottomed metallic case 12 which houses the element 11, and a sealing body 13 which seals the opening of the case 12, a heat- shrinkable resin tube 15 integrally formed with a conductive wire-like body 16 which is spirally arranged in the tube 15 is put on the external side face of the 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 is made by roughening a valve metal foil and forming a dielectric film by anodic oxidation and an aluminum foil. A capacitor element 1 is formed by winding a cathode foil with a separator interposed therebetween,
After the capacitor element 1 is impregnated with the driving electrolyte, the capacitor element 1 is housed in a cylindrical metal case 2 having a bottom.
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. It is equipped with a heat-shrinkable resin tube that is formed by integrally arranging a conductive linear body or a conductive plate-shaped body in a spiral shape. According to this configuration, it is mounted on an electronic device for audio. When used, it is possible to prevent sound quality deterioration due to the influence of magnetic field lines generated from the aluminum electrolytic capacitor itself and magnetic field lines generated from an external power transformer, etc., and realize high-quality music playback. Than it is.

[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 heat-shrinkable resin tube which is formed by integrally arranging a conductive plate-like body inside in a spiral shape is attached. According to this configuration, the heat-shrinkable resin tube is spirally arranged inside the heat-shrinkable resin tube. Since the conductive wire or conductive plate that has been generated emits lines of magnetic force, the lines of magnetic force generated from the aluminum electrolytic capacitor itself generate eddy currents due to the lines of magnetic force, and this eddy current is applied to equipment that transmits music signals. And the magnetic field lines generated from an external power transformer or the like are also canceled out by the magnetic field lines generated by the conductive linear body or the conductive plate-shaped body. High-quality 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 being impregnated with the driving electrolyte, the capacitor element 11 is housed in a bottomed cylindrical metal case 12 made of aluminum. Reference numeral 13 denotes a sealing body which 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 are attached, and a lead member connected to the anode foil and the cathode foil is connected to the anode-side external terminal 14a and the cathode-side external terminal 14b.

Reference numeral 15 denotes a heat-shrinkable resin tube formed by integrally forming a conductive linear body 16 made of a conductive material such as copper in a spiral shape inside the heat-shrinkable resin tube.
Numeral 5 is attached to the outer surface of the bottomed metal case 12 to cover 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 heat-shrinkable resin tube 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 is not generated by generating the eddy current and the signal is not degraded in the device transmitting the music signal, whereby the deterioration of the sound quality due to the signal degradation can be prevented. 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 eddy currents are not generated by the magnetic lines of force, and this does not cause signal deterioration. This can prevent sound quality deterioration due to signal deterioration.

[0011] Table 1 shows a self-standing aluminum electrolytic capacitor for smoothing the power supply of a normal audio amplifier for 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). This shows the result of a sound quality study performed using a capacitor 56V8200 μF.

[0012]

[Table 1]

As is apparent 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. Also, there was a sense of volume in the low range.

Table 2 shows the respective frequencies of a conventional aluminum electrolytic capacitor (conventional product) and an aluminum electrolytic capacitor (product of the present invention) according to one embodiment of the present invention using a YHP impedance analyzer. It shows the result of measuring the impedance at a point.

[0015]

[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 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 the 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 one embodiment of the present invention, a conductive linear member 16 made of a conductive material such as copper is spirally arranged inside a heat-shrinkable resin tube 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 heat-shrinkable resin tube 15, it may be made to integrally mold. It has the same effect as the embodiment of the present invention.

[0019]

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. It is equipped with a heat-shrinkable resin tube that is formed by integrally arranging a conductive linear body or a conductive plate-like body inside in a spiral shape. According to this configuration,
Since the conductive linear body or the conductive plate-like body spirally arranged inside the heat-shrinkable resin tube emits magnetic lines of force, the magnetic lines of force generated from the aluminum electrolytic capacitor itself are canceled by the magnetic lines of force, Magnetic lines of force generated by an external power transformer, etc. are also canceled by the magnetic lines of force generated by the conductive linear body or the conductive plate-shaped body, and as a result, the magnetic lines of force generated from the aluminum electrolytic capacitor itself and external Lines of magnetic force generated from a power transformer or the like do not generate eddy currents, and the eddy currents do not cause signal deterioration in devices that transmit music signals, so that sound quality deterioration due to the signal deterioration can be prevented, and high-quality music reproduction can be prevented. 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 Heat-shrinkable resin tube 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 heat-shrinkable resin tube.