JPS6339959Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a resin-clad solid electrolytic capacitor. In particular, the present invention relates to a solid electrolytic capacitor having a novel polarity display function.

Conventionally, when a polar solid electrolytic capacitor is set on a printed circuit board, a polarity indicator is provided on the capacitor to prevent the polarity from being connected incorrectly. The capacitor 1 shown in FIG. 1 has an inclined surface 3 formed in a part of the exterior resin on the anode terminal 2 side to provide an external identification function. FIG. 2 shows a plan view of this capacitor 1. Figure 3 shows that the cathode terminal 5 is connected to the anode terminal 4 by 2.
The polarity is identified by the presence or absence of a cut 6 in the cathode terminal 5. In FIG. 4, a groove 8 formed on the upper surface of the exterior resin is biased towards the anode terminal 9 side, so that a polarity function is provided by detecting this groove 8.

These capacitors 1 have large dimensions because the anode and cathode terminals protrude from the exterior resin, making them unsuitable for the demand for miniaturization. Furthermore, since the anode and cathode terminals are arranged on the same line, even if they are attached incorrectly, the accident of being attached on the pattern of the wiring board cannot be completely eliminated.

The solid electrolytic capacitor of the present invention is characterized by compact capacitor size and polarity display, and provides a capacitor whose exterior resin can be molded reliably. The cathode terminal is connected to the cathode layer of the element in a direction perpendicular to the anode terminal, and the ends of these anode and cathode terminals protrude from the exterior resin, and this cathode The terminal is designed to have a notch near the bend surrounding the element, and an elongated through hole in the flat surface of the cathode terminal.

The embodiment of the present invention will be described with reference to the drawings.
1 is an element of a solid electrolytic capacitor, and element 11
The element 11 is manufactured by a known manufacturing method, and a cathode layer 12 is formed on the outer periphery of the element 11.
A cathode terminal 13 is connected to the cathode layer 12. The cathode terminal 13 has a U-shaped bent portion 14 surrounding the outer periphery of the element 11 in order to hold the element 11 securely, and a notch 15 is provided near where the element 11 is connected. The notch 15 is provided on the side opposite to the anode lead 16 extending from the element 11, close to a wall surface 18 of the exterior resin 17. When the exterior resin 17 is filled into the mold, the flow of the resin 17 is improved, and the molding of the exterior resin 17 is ensured. The width of the notch 15 is wider than the width of the anode terminal 20 as shown in FIG. 5, so that polarity detection is ensured. Also, a long through hole 19 is provided in the flat portion of the cathode terminal 13, and the exterior resin 17 is bonded through the through hole 19, so that the moldability of the exterior resin 17 can be improved.

The anode terminal 20 is connected by extending in the axial direction of the anode lead 16 as in the conventional case, and the end is connected to the exterior resin 17.
It extends to the sides and bottom of the

Therefore, as in a conventional capacitor, the anode terminal 2
Unlike the capacitor in which the cathode terminal 4 is disposed in a symmetrical positional relationship corresponding to the anode terminal 20, the cathode terminal 13 is T-shaped and orthogonal to the anode terminal 20, and the cathode terminal 13 is orthogonal to the anode terminal 20. Both ends of the terminal 13 are arranged so as to lead out from the exterior resin 17.

The pattern shape of the conventional wiring board was formed on a straight line as shown in Figs. 8 and 9, so even if the anode and cathode terminals 2 and 3 of the capacitor are placed in the wrong direction, they will not be stuck by soldering. However, in the case of the present invention, the patterns are formed in orthogonal shapes as shown in FIGS. 10 and 11, so if the anode and cathode terminals 13 and 20 of the capacitor 21 are arranged in opposite directions, It cannot be connected on the pattern, making soldering impossible, and there is no risk of incorrect connection.

In the present invention, since the cathode terminal 13 is provided with the notch 15 and the elongated through hole 19, the flow of the exterior resin 17 by the mold is smoothed, and the exterior resin 17 can flow smoothly through the mold.
7 does not peel off at the cathode terminal 13 portion, and the outer layer resin 17 can be molded reliably. Furthermore, the position symmetrical to the conductive part of the anode terminal 20 is filled with the exterior insulating resin 17 through the notch 15 of the cathode terminal, and is occupied by a non-conductive part, so that it is possible to determine the polarity using a sensor or the like. This is a device that allows for reliable and easy automatic mounting.

[Brief explanation of drawings]

1 to 4 show conventional capacitors,
1 is a front view, FIG. 2 is a plan view, FIG. 3 is another plan view, FIG. 4 is another front view, FIGS. 5 to 7 show the capacitor of the present invention, and FIG. is a plan sectional view, FIG. 6 is an AA sectional view, FIG. 7 is a BB sectional view, FIGS. 8 to 9 are plan views of conventional capacitors arranged in a pattern, and FIGS. 10 to 11. The figure is a plan view of the capacitor of the present invention arranged on a pattern. In the drawings, 11: capacitor element, 12:
Cathode layer, 13: Cathode terminal, 15: Notch, 16:
Anode lead, 17: Exterior resin, 19: Long through hole, 20: Anode terminal.

Claims (1)

[Scope of utility model registration request] The anode lead leading out from the solid electrolytic capacitor element is connected so that the anode terminal is pulled out in the same axial direction, and the cathode layer formed on the outer periphery of this element has an anode lead that is perpendicular to the anode terminal and has both ends connected to the outer periphery. The cathode terminal is connected so as to lead out from the resin,
A cutout of the cathode terminal is provided near where the element is connected to the cathode terminal and at a position symmetrical to the conductive part of the anode terminal, and a long through hole is provided in the flat part of the cathode terminal to enclose the element. 1. A solid electrolytic capacitor characterized in that the notch and the elongated through-hole are also filled with an exterior resin.