JPH0246029Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The invention incorporates a cylindrical electrolytic capacitor into the space of a bottomed exterior case with an opening on one side.
This relates to a chip-type electrolytic capacitor in which the opening of the outer case is filled with resin.

[Prior Art] As this type of chip-type electrolytic capacitor, there is Utility Model Registration Application No. 143860 (Chip-type electrolytic capacitor) filed by the applicant on September 22, 1989. .

As shown in FIGS. 3 and 4, this type of chip-type electrolytic capacitor 1 has a space 3 formed inside an outer case 2 in the form of a rectangular prism, for example, with one side open. Incorporate 4,
Further, the opening of the space 3 is filled with resin 5, and the resin 5 is cured to be sealed. Here, the flat lead wires 41 and 42 from the electrolytic capacitor 4 through the resin 5 are bent and positioned in side grooves 21 and 22 formed in the side surface 20 of the exterior case 2.

[Problems to be Solved by the Invention] When this chip electrolytic capacitor 1 is mounted horizontally as shown in FIG. 5, for example, by soldering onto a conductor 61 on a printed wiring board 6,
Since the outer surfaces of the lead wires 41 and 42 do not protrude from the outer surface 20 of the outer case 2, stable mounting is possible, but the floor area during mounting is large and high-density mounting is not possible. Furthermore, the heat from the printed wiring board 6 during mounting may be transmitted to the internal electrolytic capacitor 4 through the outer case 2, which has a relatively thin wall thickness, which may adversely affect the characteristics of the electrolytic capacitor. Ta.

[Means for solving the problem] However, the present invention incorporates an electrolytic capacitor in the space of a bottomed exterior case with one side open.
The present invention provides a chip-type electrolytic capacitor in which a chip-type electrolytic capacitor filled with resin is mounted vertically in the opening of an exterior case, and specifically, the opening edges of the bottomed exterior case are mounted opposite to each other. A notch is provided at the corner.

[Example] Hereinafter, an example of a chip type electrolytic capacitor according to the present invention will be described based on FIGS. 1 and 2. In addition, prior to description, the same reference numerals are given to the same parts as in the conventional example.

First, the exterior case 2 is shown in FIG. The exterior case 2 is made of thermosetting resin such as phenol resin, epoxy resin, diallyl phthalate resin, and silicone resin, highly heat-resistant thermoplastic resin such as polyphenylene sulfide, and ceramic material, and is heat-resistant. Its appearance is rectangular prism-like. The exterior case 2 has a space 3 suitable for accommodating the electrolytic capacitor 4, and has a bottomed shape with one side open as a whole, and corners of the opening edge 23 facing each other are formed in the outer case 2. Notches 24 and 25 are formed in the portion.

The electrolytic capacitor 4 is assembled in the space 3 of the exterior case 2. Further, the opening of the space 3 is filled with liquid resin 5, and is cured by ultraviolet curing, heat curing, or room temperature curing means, and sealed. The electrolytic capacitor 4 is a capacitor element in which an anode foil and a cathode foil of, for example, aluminum foil are wound with electrolytic paper interposed therebetween, impregnated with an electrolytic solution, and assembled together with a rubber sealing member. Flat lead wires 41, 4 are connected from the electrolytic capacitor 4 through the resin 5.
2 is bent and positioned within the notches 24 and 25.

[Effect of the invention] As described above, in the chip type electrolytic capacitor 1A according to the invention, the notch 24 of the opening edge 23,
Since the flat lead wires 41 and 42 are bent and positioned in the inside of the chip type electrolytic capacitor 1A, the chip type electrolytic capacitor 1A can be connected to the conductors 61 and 62 of the printed wiring board 6 as shown in FIG. This is preferable for mounting vertically on top. moreover,
Even though the heat from the printed wiring board 6 during mounting is transmitted to the electrolytic capacitor 4 through the filled resin 5, since it is far from the surface of the printed wiring board 6, there is no adverse thermal effect as in the conventional example. This is difficult to accept.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an exterior case according to the present invention, Fig. 2 is a sectional view of a chip type electrolytic capacitor according to the present invention, Fig. 3 is a plan view showing a conventional chip type electrolytic capacitor, and Fig. 4 is a plan view showing a conventional chip type electrolytic capacitor. A sectional view taken along the line A--A in FIG. 3, and FIG. 5 are diagrams for explaining mounting a conventional chip-type electrolytic capacitor in a horizontal configuration. In the figure, 1,1A...chip type electrolytic capacitor,
2... Exterior case, 3... Space, 4... Electrolytic capacitor, 5... Resin, 23... Opening edge, 24,
25... Notch.

Claims (1)

[Scope of utility model registration request] In a chip-type electrolytic capacitor in which an electrolytic capacitor is installed in the space of a bottomed exterior case with an opening on one side and the opening is filled with resin, a notch is formed at the opposite corners of the opening edge of the exterior case. A chip-type electrolytic capacitor characterized in that a flat lead wire from an electrolytic capacitor is bent and placed in the notch through a resin.