JPS6325730Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a chip-type solid electrolytic capacitor with polarity indication.

A chip type solid electrolytic capacitor is a capacitor about the size of a grain of rice, and is automatically supplied onto a printed wiring board using a parts feeder.

There are various terminal shapes of chip type solid electrolytic capacitors as shown in the figure. In the case of FIG. 1, 1 is an element, an anode terminal bent into a crank shape is attached to an anode lead 2 led out from the element 1, and a cathode terminal 5 is attached to the cathode layer 4 of the element 1. . The anode terminal 3 and the cathode terminal 5 are partially exposed and covered with an exterior resin 6. Since the polarity of a capacitor 7 having a resin sheath 6 cannot be distinguished just by looking at the positive and negative terminals, a chamfer 8 is usually formed on the anode terminal 3 side.

In the case of the capacitor 10 shown in FIG. 2, the anode terminal 3 and cathode terminal 5 connected to the element 1 are located approximately at the center of the exterior resin 6 and are led out in opposite directions.

In the case of the capacitor 11 shown in Fig. 3, the anode terminal 3
This shows the case where the bent shapes of the cathode terminal 5 are different. These chip solid electrolytic capacitors 7,10
and 11 had the same shape just by looking at the terminals led out from the exterior resin 6, so the polarity could not be distinguished. For this reason, some ideas have been devised, such as making one side of the terminal bifurcated to change its shape.

The present invention provides a capacitor in which the positive and negative terminals can have the same shape, and by providing a stepped notch in the exterior resin, the polarity can be determined on the parts feeder when supplying the capacitor.

An embodiment of the chip solid electrolytic capacitor of the present invention will be explained based on the drawings.The inside covered with the exterior resin 7 is the same as the conventional one, and in FIG.
An anode terminal 3 and a cathode terminal 5 are arranged opposite to each other on the bottom surface of the capacitor 21. A stepped notch 24 is provided at one end of the upper part of the exterior resin 6 along the longitudinal direction (a direction parallel to the direction in which the anode lead 2 is led out from the element 1). The notch 24 must be formed only on one side of the upper part 25 of the exterior resin 6, and must be formed asymmetrically with respect to the center, as shown in FIG. 4b. Figures 5 and 6
Similarly, in the figure, a stepped notch 24 is provided only on one side of the upper part 25 of the exterior resin 6. FIG. 7 shows a cross-sectional view of the capacitor 23 moving along the track 31 of the parts feeder 30, in which 32 is a side wall and 33 is a guide. In the case of figure a, the notch 24 of the capacitor is aligned with the guide 33, and the capacitor 23 can pass on the track 31. In the case of figure b, the capacitor 23 hits the guide 33, preventing it from moving further on the track 31, and as shown by the arrow, it deviates from the track 31 and falls. Capacitor 23 passing through guide 33 of parts feeder 30
Since only the notches 24 match, the direction of the notches relative to the terminals cannot be determined, and the parts feeder 30 allows capacitors with polarities to be reliably aligned in the same direction.

The present invention is a chip-type solid electrolytic capacitor constructed as described above, in which a notch is cut only on one side of the exterior resin as a means to prevent the terminals of the polarized capacitor from being connected in the wrong direction on the printed circuit board. By providing this section, it is possible to ensure that the parts are arranged with the same polarity in the parts feeder. In addition, when fixing a capacitor on a board without using a parts hood, the step-like notch provided in the longitudinal direction of the resin makes it extremely easy to identify, and is highly effective in avoiding erroneous connections of the capacitor.

[Brief explanation of the drawing]

Figures 1 and 2 show conventional capacitors a.
Figure 3 shows a front sectional view, Figure b shows a plan view, Figure 3 shows another conventional capacitor, Figure A shows a front sectional view, Figure B shows a side view, and Figures 4 to 6 show the capacitor of the present invention. Figure A is a front view, Figure B is a side view, and Figure 7 shows a capacitor passing through the track of the parts feeder, Figure A is a cross-sectional view showing a state in which it is passing, and Figure B is a sectional view showing a state in which it is falling. In the drawings, 1 is an element, 2 is an anode lead, and 3 is an anode lead.
is the anode terminal, 5 is the cathode terminal, 6 is the exterior resin, 2
1, 22, and 23 are capacitors of the present invention, 24 is a notch, and 25 is an upper part of the resin.

Claims (1)

[Scope of utility model registration request] An anode terminal and a cathode terminal, which are derived from the element of a solid electrolytic capacitor, are arranged on the bottom surface of the exterior resin so that they face each other, and only a part of the anode terminal and cathode terminal is exposed, and the element is covered with the exterior resin. 1. A chip-type solid electrolytic capacitor characterized in that one end of the upper part of the exterior resin is shaped like a step along the longitudinal direction, and a notch is provided only in the exterior resin.