JPH0214191Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to electronic components, and particularly relates to a display mechanism for displaying the month of manufacture of solid electrolytic capacitors.

[Prior art]

This type of solid electrolytic capacitor is made by, for example, press-molding metal powder with a valve action into a prismatic shape and sintering it.A capacitor element is made of metal powder that has a valve action, and is then sintered.A metal wire that has a valve action is installed in advance as an anode lead, and the anode lead A plate-shaped first external lead member is welded to the capacitor element, and a plate-shaped second external lead member is connected to the electrode extraction layer of the capacitor element using a conductive adhesive, and the entire circumferential surface of the capacitor element is covered with resin. The resin material is molded and coated with a resin material so that a protrusion is formed at the center of the lower surface, and the lead-out ends of the first and second external lead members are bent along the lower surface of the resin material. There is.

By the way, in this solid electrolytic capacitor,
There is a symbol stamped on the top of the resin material that indicates the product type, characteristics, month of manufacture, manufacturing history, etc., and by reading the symbol, you can tell what type of solid electrolytic capacitor it is. It is something that can be easily known.

However, in recent years, with the trend towards smaller, lighter, thinner and smaller solid electrolytic capacitors, there has been a strong demand for smaller size, for example 2.54 x 4.57 x 2.54.
Products downsized to about mm have been put into practical use.

[Problem that the invention attempts to solve]

When solid electrolytic capacitors are miniaturized in this way, it is difficult to stamp all the display symbols on the upper surface of the resin material. On the other hand, if the display symbol is made extremely small, it may be possible to imprint it, but it will not only be difficult to read, but it will also be difficult to imprint clearly.

Therefore, in the past, only the most necessary items such as characteristics were stamped, but information such as the month of manufacture was not stamped, so in the event that a defective accident occurred, it would be difficult to identify the manufacturing type of the solid electrolytic capacitor. It has a history and it is not possible to reveal when it was manufactured.
There is a problem in that it is difficult to determine the exact cause of defects.

Therefore, an object of the present invention is to provide an electronic component that can reliably display a desired display symbol even if the exterior form is made smaller due to its simple configuration.

[Means to solve the problem]

Therefore, in order to achieve such an objective, the present invention leads out a plurality of external lead members in different directions from the component body, and also makes the main part including the component body a resin material with a protrusion in the center of the lower surface. is molded so that a The parts are integrally formed in a radial shape, and the rising part can be used as a display symbol.

[Effect]

According to this invention, since the rising parts of the concave part of the protruding part are formed radially, for example, by leaving the rising parts in an appropriate combination or deleting them, the manufacturing month and manufacturing history can be determined. etc. can be displayed.

〔Example〕

Next, an embodiment of the present invention will be described with reference to FIGS. 1 and 2.

In the figure, 1 is a capacitor element (component body) made by press-molding metal powder with valve action into a prismatic shape and sintering it, and in the center of it is a metal wire with valve action as the anode lead 2. , which is planted prior to pressure molding of metal powder. Note that this anode lead 2 can also be led out by welding to the circumferential surface of the capacitor element 1. An electrode lead layer 3 is formed on the circumferential surface of the capacitor element 1 via an oxide layer, a semiconductor layer, and a graphite layer. On the other hand, for example, a plate-shaped first external lead member 4 is welded to the anode lead 2.
For example, a plate-shaped second external lead member 5 is connected to the electrode lead layer 3 of the capacitor element 1 using a conductive adhesive such as silver paste. Then, the entire circumferential surface of the capacitor element 1 is covered with a resin material 6 by molding so that a notch-like irregularly shaped part 7 is formed at the end of the upper surface 6a and a rectangular protrusion 8 is formed at the center of the lower surface 6b. has been done. In particular, a circular recess 9 formed by an ejector pin is formed in the central portion of the protrusion 8, and thin rising portions 10 are integrally formed radially within the recess 9. Incidentally, this rising portion 10 is formed at the same time as resin molding by providing a radial slit at the top of the ejector pin.

In this embodiment, when the rising portion 10 is used as a manufacturing month, for example, 6 to 12 rising portions 10 are formed, and the rising portion 10 is formed according to the manufacturing month.
can be deleted as appropriate, and the month of manufacture can be easily displayed using the portion without the rising portion 10.

In particular, to remove the rising portion 10, a bulge portion is formed on the top surface of a pin equivalent to the ejector pin, corresponding to the rising portion to be removed, and a recessed portion corresponding to the rising portion not to be removed. By forcibly inserting the pin into the recess 9, only the predetermined raised portion 10 can be crushed and removed.

[Effect of idea]

As described above, according to the present invention, since the rising portions are formed radially within the concave portion of the protruding portion, the manufacturing month, manufacturing history, characteristics, etc. can be displayed by deleting the rising portions in an appropriate combination. , it can fully cope with the miniaturization of the exterior form. In particular, since the rising part is formed within the recess, it will not disappear when it is assembled into a printed board, etc.
It is possible to smoothly investigate the cause when an accident occurs.

In the present invention, the electronic component is not limited to solid electrolytic capacitors, but can also be applied to resistors, coils, etc., and the concave portion may be rectangular in addition to circular.

[Brief explanation of the drawing]

Figure 1 is a side sectional view showing one embodiment of the present invention, Figure 2
The figure is a bottom view of FIG. 1. In the figure, 1 is the component body (capacitor element),
4 and 5 are external lead members, 6 is a resin material, 6a is an upper surface, 6b is a lower surface, 8 is a protruding portion, 9 is a recessed portion, and 10 is a rising portion.

Claims (1)

[Claims for Utility Model Registration] (1) A plurality of external lead members are led out in different directions from the component body, and the main portion including the component body is made of resin material, and a protrusion is formed in the center of the lower surface. In the case where the lead-out ends of the external lead members are arranged along the lower surface of the resin material, a recess is formed in the protruding part by an ejector pin, and a thin rising part is formed radially in the recess. An electronic component characterized by being integrally formed. (2) The electronic component according to claim 1 of the utility model registration claim, characterized in that the rising portion is formed so as not to protrude from the recessed portion.