JPS6150320A - 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 Field of Industrial Application The present invention relates to electrolytic capacitors used in various electronic components.

Conventional configuration and its problems A conventional electrolytic capacitor of this type was constructed as shown in FIG. That is, a capacitor element 1 formed by winding an anode foil and a cathode foil together with a separator and impregnating it with a driving electrolyte is housed in a bottomed cylindrical metal case 2, and the open end is sealed via a terminal plate 3. When it was mounted on a printed circuit board, it was electrically and mechanically connected and fixed using terminals 4.

Furthermore, a terminal structure for a snap tie 7 as shown in FIG. 2 has recently been proposed. In this type of electrolytic capacitor, the terminal 6 has a dogleg shape and the tip is thinner, making it easier to insert it into a printed circuit board.

Not only is this not possible, but there is also a risk of fire, and reverse insertion must be avoided at all costs. For this purpose, the display part 6 is placed on the exterior sleeve.
or a mark was placed on the terminal fixing rivet 7.

In this case, the polarity of the electrolytic capacitor must be checked visually, and in actual mounting work, insertion errors (reverse insertion) are often made, resulting in a failed situation.

Furthermore, this type of electrolytic capacitor is larger and heavier than other electronic components, so when it is inserted into a printed circuit board and the device is vibrated, the effect on the printed circuit board is concentrated near the terminals of the electrolytic capacitor. , the copper foil on the printed circuit board was peeling off, etc.

Furthermore, this type of electrolytic capacitor is soldered together with other electronic components, and then flux cleaning is performed to remove rosin. In this case, the cleaning agent remains in the gap between the printed circuit board and the electrolytic capacitor, causing corrosion of the electrolytic capacitor.

OBJECTS OF THE INVENTION The present invention obviates these conventional drawbacks.
This completely prevents reverse insertion when attaching an electrolytic capacitor to a printed circuit board, improves the workability of the attachment process, improves vibration resistance, and reduces corrosion defects due to flux cleaning after soldering. The purpose is to improve so-called solvent resistance.

Structure of the Invention In order to achieve this object, the present invention connects the most extreme parts of an anode terminal whose base part is thicker than its tip part and a cathode terminal whose base part is thicker than its tip part. Bottles whose bases are thicker than their tips are arranged on a perpendicular line passing through the midpoint of the straight line, and these three points form an isosceles right triangle.

With this configuration, when inserting an electrolytic capacitor into a printed circuit board, the anode, cathode, and bottle are inserted, so reverse insertion is completely impossible. That is, if the electrolytic capacitor is composed of only an anode terminal and a cathode terminal, the only way to mount it on a printed circuit board is by normal insertion, or by reverse insertion in which the electrolytic capacitor itself is rotated 180 degrees.

According to the configuration of the present invention, since the bottle is arranged at a position other than the line connecting the anode terminal and the cathode terminal, for example, if the bottle is in the reverse position, the bottle will not hit the printed circuit board and will not be inserted, completely preventing reverse insertion. . .

Furthermore, since the arrangement is such that the leading edge of the anode terminal, the leading edge of the cathode terminal, and the leading edge of the bottle form a right-angled isosceles triangle, it is extremely resistant to vibrations of the equipment after mounting.

In addition, according to the configuration of the present invention, since the bottle is connected to the anode terminal or the cathode terminal, the copper foil of the printed circuit board connected to these needs to be thick. There are also fewer holes in the foil.

Furthermore, according to an arrangement of the invention, an anode terminal.

The cathode terminal and bottle have different thicknesses at the base and tip, so when mounted on a printed circuit board, a gap can be created between the electrolytic capacitor and the printed circuit board, and after flux cleaning, Since the cleaning agent evaporates very easily, corrosion defects of the electrolytic capacitor will no longer occur.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 3 to 6. In addition, in the drawings, the same parts as in FIGS. 1 and 2 are given the same numbers.

In the figure, 8 is a bottle according to the invention.

The planar arrangement of the bins 8 is as shown in FIG.

That is, the bin 8 is provided on a perpendicular line passing through the midpoint of the straight line connecting the tips 9 of the terminals 6. In particular, in FIG. 4, the terminal tip 9 and the pin 8 are arranged to form a right isosceles triangle. This arrangement can sufficiently achieve its purpose if it is an isosceles triangle, and does not necessarily need to be a right-angled isosceles triangle.

The vial 8 is connected to the anode terminal or the cathode terminal and is not independent of these two terminals.

Therefore, fixing to the terminal board is performed at two locations.

In the device shown in FIG. 5, the anode terminal, cathode terminal, and bottle each have a cylindrical shape, unlike the flat plate shape shown in FIG. 3. These shapes may be a mixture of flat plate shapes and round bar shapes.

Further, FIG. 6 shows an example of mounting a glint board 10-\ of an electrolytic capacitor according to the present invention.

Gap 11 between the printed circuit board 10 and the electrolytic capacitor body
is terminal 5. By appropriately moving the conversion position of the thickness of the bottle 8, the desired size can be obtained.

Effects of the Invention As described above, according to the present invention, the following effects can be obtained.

(1) Reverse insertion can be completely prevented.

(2) Vibration resistance is improved. (Since the copper foil on the printed circuit board can be made wider, the bottle is connected to the anode terminal or the cathode terminal.) (3) The number of man-hours required for fixing the terminal to the sealing plate can be reduced.

(2 times) (3 times required if not connected to anode terminal or cathode terminal) (4) There are few leakage points of electrolyte (2 places), so there is less possibility of paste leakage.

1 (5) No retention of cleaning agent,
Corrosion defects are eliminated.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a conventional electrolytic capacitor, FIG. 2 is a perspective view showing a terminal portion of a conventional electrolytic capacitor, and FIG. 3 is a perspective view showing a terminal portion of an electrolytic capacitor according to an embodiment of the present invention. FIG. 4 is a top view showing the terminal arrangement according to the present invention;
FIG. 6 is a perspective view of a terminal section showing another embodiment of the present invention, and FIG. 6 is a front view of an electrolytic capacitor according to the present invention mounted on a printed circuit board. 1...Condenser element, 2...'y-s,
s...Terminal, 8...Bin. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
Figure 5 Figure 3 Figure 4

Claims (3)

[Claims] (1) The tip of the anode terminal is thicker than the tip, and the cathode terminal is thicker than the tip of the cathode terminal. The pins are arranged such that the thickness of the pin is thicker at the root than at the bottom, and the three points of the anode terminal, the cathode terminal, and the tip of the pin form a right-angled isosceles triangle in plan view. Features of electrolytic capacitors. (2) The electrolytic capacitor according to claim 1, wherein the anode terminal, cathode terminal, and pin have a flat shape. (3) The electrolytic capacitor according to claim 1, wherein the anode terminal, the cathode terminal, and the pin have a round bar shape.