JPH04125437U - Electrolytic capacitor - Google Patents

Abstract

(57) [Summary] (with amendments) [Purpose] The electrolytic capacitor element is constructed by wrapping two layers of tape to prevent it from winding, and it can be used in audio equipment to improve sound quality. [Structure] The end of the capacitor element is wrapped with polypropylene tape, and a polyfluoroethylene resin tape is wrapped so that it covers both this tape and the outer circumferential surface of the capacitor element, and the electrolyte is applied to the capacitor element. It is characterized by being impregnated, stored in a case, and sealed.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to electrolytic capacitors, and more specifically, it is a suitable electric capacitor for audio equipment. It concerns the solution capacitor.

0002

[Conventional technology]

Taking an aluminum electrolytic capacitor as an example, the capacitor is made of aluminum. Wrap the anode foil and cathode foil of aluminum with a separator in between, and wrap the ends with tape, etc. After winding the capacitor element and impregnating it with electrolyte, the capacitor element The child is housed in a bottomed cylindrical outer case made of aluminum, for example. and, By sealing the opening of the outer case with a sealing material such as synthetic rubber, configured.

0003

[Problem that the idea aims to solve]

After winding the electrode foil and separator as described above, the capacitor element is The ends are secured with tape. The purpose of the capacitor element is to This can be achieved by these winding methods, but there are problems especially when used in audio equipment. In other words, the sound quality deteriorates. For example, regarding resonance due to vibrations from inside and outside the element. has little effect on suppressing it.

0004

[Means to solve the problem]

In order to solve the above problems, in this invention, as illustrated in FIG. When an anode foil and a cathode foil made of aluminum or the like are wound with a separator in between, Then, wrap the end of the winding with polypropylene tape 2, etc., and then wrap it with polyfluoride tape. Apply the tyrene resin tape 3 to the anode foil, cathode foil, separator winding outer circumferential surface, and the above port. Electrolyze the capacitor element 1 wrapped around both sides of the polypropylene tape 2. It is impregnated with a liquid and stored in a bottomed cylindrical case 7, and the opening of the outer case is opened with a rubber, for example. The capacitor is sealed with a sealing body 6 made of aluminum or the like to form an electrolytic capacitor as shown in FIG. The polyfluoroethylene resin tape 3 is made of polytetrafluoroethylene, tetrafluoroethylene, Lafluoroethylene-perfluoroalkyl vinyl ether copolymer, tetraph Fluoroethylene-hexafluoropropylene copolymer, tetrafluoroethylene -hexafluoropropylene-perfluoroalkyl vinyl ether copolymer, Tetrafluoroethylene-ethylene copolymer, polychlorotrifluoroethylene or chlorotrifluoroethylene-ethylene copolymer. In addition, 4 and 5 are the extraction leads attached to each electrode foil, anode foil and cathode foil. Ru.

[0005]

[Effect]

Polyfluoroethylene resin is generally used for winding of electrolytic capacitor elements. Tape has a higher specific gravity and is more flexible than, for example, polypropylene. . This type of tape has a high specific gravity and is highly flexible, both inside and outside the element. Resonance due to vibration is less likely to occur, and even if vibration does occur, it can be suppressed in a short period of time. It has a relaxing effect. In particular, electrolytic capacitors used in audio equipment are susceptible to mechanical vibrations and Significantly reduces auditory distortion due to the effects of vibrations propagating inside and electrical vibrations. It can be relaxed.

[0006]

【Example】

Examples of this invention will be described below. Rated voltage 50V, capacitance 470μF (Case size: diameter 16mm x height 35.5 mm) aluminum electrolytic capacitor, the outer circumference of the winding of capacitor element 1 Silicone-based pressure sensitive material applied to both the surface and the polypropylene winding tape 2. Polyfluoride made of 80 μm thick polytetrafluoroethylene coated with adhesive Ethylene resin tape 3 is wound to form capacitor element 1, and electrolyte is applied to it. It is impregnated and stored in a bottomed cylindrical outer case 7, and the opening of the outer case is sealed with an elastic sealer 6. It was sealed at. 4 and 5 are drawer leads. For comparison, the capacitor element was secured using only polypropylene tape. It was produced in the same manner as in the above example except for the use of a plate and a capacitor element. The aluminum electrolytic capacitors according to the above examples and comparative examples were used in a CD player. Here are the results of comparing the sound quality using it as an output coupling capacitor. It is shown in Table 1. Note that the numerical value is on a 10-point system, and the higher the numerical value, the better. As can be seen from this table, according to the examples, comparisons were made in all items including the sense of distortion. The evaluation exceeded that of the previous example. In addition, in the above example, a tape with a thickness of 80 μm was used. However, this is just an example, and a thickness of 10 to 230 μm can be selected as appropriate. Note that the capacitor element in FIG. 1 described above can be configured as shown in FIG. 2 or 3. A similar effect was obtained.

[0007]

[Effect of the idea]

As explained above, according to this invention, it can be used as a winding tape for capacitor elements. Wrap it with polypropylene tape and then wrap it with polyfluoroethylene resin. By wrapping the tape in layers, mechanical vibrations, vibrations propagating in the air, and It can significantly reduce auditory distortion caused by electrical vibrations, etc. In particular, an electrolytic capacitor suitable for audio equipment can be provided.

[Brief explanation of drawings]

FIG. 1 is a perspective view of one embodiment of the electrolytic capacitor element of this invention. FIG. 2 is a perspective view of another embodiment of the electrolytic capacitor element of this invention. FIG. 3 is a perspective view of another embodiment of the electrolytic capacitor element of this invention. FIG. 4 is a sectional view of an embodiment of the electrolytic capacitor of this invention.

[Explanation of symbols]

1 Capacitor element 2 Polypropylene tape 3 Polyfluoroethylene resin tape 4, 5 Drawer lead 6 Sealing body 7 Exterior case

[Table 1]

Claims (1)

[Scope of utility model registration request] Anode foil and cathode foil facing each other are wound through a separator, and the ends of the windings are secured with polypropylene tape.
Furthermore, the capacitor element is wrapped with polyfluoroethylene resin tape so as to cover both the anode foil, cathode foil, the separator's winding outer circumferential surface, and the polypropylene tape, and the capacitor element is impregnated with electrolyte and stored in a bottomed cylindrical case. An electrolytic capacitor characterized in that the opening of the case is sealed.