JPS6028126Y2 - Electrolytic capacitor - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to improvements in terminals of electrolytic capacitors.

Generally, in a W capacitor, a capacitor element 3 is formed by connecting lead plates 1 and 2 to an anode electrode foil and a cathode electrode foil made of aluminum or the like by caulking or the like, and then winding them with electrolytic paper interposed therebetween.

Next, the capacitor element 3 is impregnated with an electrolytic solution, and the external terminals 4 and 5 previously attached to the sealing plate 6 are connected to the lead plates 1 and 2 led out from the capacitor element 3,
The capacitor element 3 is housed in a capacitor case 7 made of aluminum, resin, etc., the capacitor element 3 is fixed with an element fixing material 8, and the opening of the capacitor case 7 is sealed by wrapping.

However, in recent electronic circuits, especially those related to audio, there are many circuit designs in which the circuit potential is O (zero) and the ■ (plus) potential and ○ (minus) potential are set. As an electrolytic capacitor suitable for design, a dual power supply [1 capacitor] has recently been developed and put into practical use.

There are two types of structures for electrolytic capacitors for dual power supplies.One is to wind two elements together on a coaxial circumference with an insulator interposed between them, and the other is to form two capacitor elements. There is one in which the two are placed in separate chambers, and the latter two
An electrolytic capacitor for two power supplies, in which capacitor elements are placed in separate chambers, is wound with electrolytic paper between the anode electrode foil and the cathode electrode foil, to which lead plates 1 and 2 are connected, as shown in Figure 2. The rotated capacitor element 3 is inserted into a capacitor case 9 having two chambers after injecting the element fixing material 10, and the external terminals 4, 5. 4' and 5' are connected, a sealing plate 11 is fitted and sealed, and the structure has two electrolytic capacitors in the same case. External terminals 5 and 4', which have a potential of 0 (zero), were connected as [F] terminals using lead wires 12a, etc., but recently, external terminals 5 and 4', which become E terminals, have been connected. An electrolytic capacitor for two power supplies as shown in FIG. 4 with a common external terminal 12b is generally used.

In addition, Fig. 5 shows the [F
] A perspective view of a common external terminal 12b having a terminal is shown.

In general, electrolytic capacitors for dual power supplies are used in circuits such as the one shown in Figure 6, but from the perspective of sound quality in audio technology, electrolytic capacitors for dual power supplies using the connection method shown in Figure 3 are used. There is a significant difference in sound quality between the electrolytic capacitor for dual power supplies and the electrolytic capacitor for dual power supplies connected with the common external terminal 12b as shown in Fig. 4. You can get sound quality close to the natural sound with no distortion.

The cause of this can be found by investigating the direction of the minute current flowing through the [F] terminal. In the electrolytic capacitor for two power supplies in the connection method shown in Fig. 3, external terminal 4 - capacitor element - external terminal 5 - [F] It can be seen that a minute current flowing through the section [F] - external terminal 4' - capacitor element - external terminal 5' occurs simultaneously.

However, in the electrolytic capacitor for dual power supplies shown in Figure 4 that uses the common external terminal shown in Figure 5, the current flows are not clearly distinguished, and the current flowing to the [F] section and the current flowing to the [F] section are not clearly distinguished. Since the current that flows further, the current that flows from the rectifier side to the load side, etc. crosses the entire terminal in a disorderly manner, various distortions naturally occur, which is thought to be the cause of poor sound quality.

However, the method shown in Figure 3 takes time in terms of man-hours,
The inductance of the lead wires had a negative effect on the sound quality.

The present invention improves these drawbacks and will be described with reference to the embodiment shown in FIGS. 7 and 8.

Fig. 7 shows a terminal shape that is approximately U-shaped and distinguishes between the input side and the output side in the waist circuit, and an arbitrary shape approximately in the center of the common external terminal 25 having the [F] terminal of a conventional electrolytic capacitor for two power supplies. A perspective view of the terminal shape with a hole provided is shown.
A is a common external terminal, and port is an individual external terminal.

FIG. 8 is a perspective view of an electrolytic capacitor for dual power supplies using the terminals shown in FIG. 7. The common external terminal 25 in FIG. F] part is formed, and an elliptical or square hole 31 is formed between the terminal fixing holes 30 and 30 of [11128].

The openings in FIG. 7 are individual external terminals 24, 24', which are U-shaped like those shown in FIG. 7, and have tongues and terminal fixing holes.

Using the individual external terminals 24, 24' and the common external terminal 25 thus formed, the lead plate is connected to the anode electrode foil and the cathode electrode foil by caulking or the like, as shown in FIG. A lead plate for the electrolytic capacitor element 23 wound with electrolytic paper interposed therebetween, a common external terminal 25 fixed in advance to the sealing plate 26, and an individual external terminal 24.
, 24' are connected by caulking etc., and the aluminum,
The capacitor element 23 is housed in a capacitor case 27 made of resin or the like, and a sealing plate 26 is fitted to the open end of the case 27 and sealed by a method such as winding or welding to produce an electrolytic capacitor.

In the present invention, by using the terminals formed as shown in FIG.
→ Common external terminal 25 → Flow of [F] section, [F] section → Common external terminal 25 → Capacitor element 23 → Individual external terminal 2
4' flow is clearly divided, and the common external terminal 25
In this case, as shown in FIG. 9, the current is clearly divided from the rectifier side to the [F] section ○ side and ■ side to the load side.

In addition, in terms of sound quality, there is no lead wire inductance due to the connection method shown in FIG. 3, and reproduced sound close to the original sound without any sense of distortion can be obtained.

In addition, the cost is reduced as the terminal material is reduced, and circuit wiring is easy using the same connection method as shown in FIG. 4.

As described above, the present invention reduces the cost of terminals and has more technical effects than the conventional ones, making it a valuable invention.

[Brief explanation of the drawing]

Figure 1 is a sectional view of a conventional electrolytic capacitor, Figure 2 is a sectional view of an example of a conventional electrolytic capacitor for dual power supplies, and Figures 3 and 4 are cross sections of main parts of a conventional electrolytic capacitor for dual power supplies. Figure 5 is a perspective view of a conventional common external terminal used in the electrolytic capacitor for dual power supplies shown in Figure 4, Figure 6 is a circuit diagram of the electrolytic capacitor for dual power supplies, and Figure 7 is a diagram of the conventional common external terminal used in the electrolytic capacitor for dual power supplies shown in Figure 4. 2
Fig. 8 is a perspective view of a terminal used in an electrolytic capacitor for power supply; A is a common external terminal;
The figure is an explanatory diagram showing the flow of minute current in the common external terminal used in the electrolytic capacitor for two power sources according to the present invention. 23: Electrolytic capacitor element, 24.24': Individual external terminal, 25: Common external terminal, 26: Sealing plate, 27: Capacitor case, 28: U groove.

Claims (2)

[Scope of utility model registration request] (1) In an electrolytic capacitor in which at least two electrolytic capacitor elements are housed in individual chambers, the external terminals are a rectangular metal plate bent into a U-shaped cross section, and the circuit input is provided at the ends of both sides. An electrolytic capacitor characterized by using a common external terminal formed by forming tongues on the side and the output side. (2) The electrolytic capacitor according to claim 1, which is a registered utility model, wherein an oval or square hole is provided at approximately the center of the bottom of the UN of the common external terminal.