JPH0234819Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a fitting for attaching a capacitor to a chassis, and specifically provides a resin fitting for a capacitor that uses resin to improve the insulation properties between the capacitor and the chassis and to reduce the installation space. It is.

Conventionally, the fittings used for electrolytic capacitors, for example, were made by punching out a metal plate, forming it into a round shape to match the outer diameter of the capacitor, bending the ends to create a tightening part, and then securing the tightening part with screws, rivets, etc. Some devices secure the capacitor in the fixture by tightening the capacitor. In this structure, a tongue piece is provided at right angles to the rounded portion in order to fix the capacitor, and a mounting hole formed in the tongue piece is used to attach the capacitor to the chassis using screws or the like. However, in this configuration, since the fixture is made of metal, insulation cannot be maintained, so the capacitor is covered with an insulating sleeve and then fixed to the fixture. This has the drawback that the capacitor may break or the edges of the fitting may dig into the insulating sleeve due to tightening when fixing the capacitor to the fitting, impairing insulation properties. In addition, as mentioned above, there were other problems such as the need for a tongue piece when attaching to the chassis, which required a large mounting area, and the mounting work using screws, nuts, or rivets, which resulted in poor work efficiency. Resin fittings may be considered as a way to eliminate these drawbacks, but the means for fixing the capacitor may include simply inserting the capacitor into the inner diameter of the cylindrical part that matches the outer diameter of the capacitor, or providing a small protrusion on the inner diameter of the cylindrical part. Therefore, there was a problem with the important fixing force.

The present invention has been devised in view of the above points, and it is an object of the present invention to provide a resin fixture for a capacitor that uses a resin fixture and can increase the fixing force of the capacitor. This will be explained below with reference to the drawings. As shown in FIG. 1, a resin fitting 1 for a capacitor made of polypropylene, polyethylene, vinyl chloride, polyacetal, polyphenylene oxide, etc. consists of a cylindrical portion 3 having a bottom surface 2, and the inner surface of the cylindrical portion 3 has a capacitor attached thereto. At least one small protrusion 4 is formed to increase the fixing force, and the bottom surface 2 is tapered toward the center so that the center of the inner surface is higher, and the outer surface of the bottom surface 2 is tapered toward the center. A mounting screw 5 is integrally provided on the holder. When a capacitor 6 is inserted into such a resin fitting 1 as shown in FIG. 2, the bottom surface of the capacitor 6 comes into contact with the bottom surface 2 of the tapered fitting 1, and when the capacitor 6 is pressed even more strongly. The tapered bottom surface 2 becomes flat, and due to its reaction, the cylindrical portion 3 tightens the capacitor 6 more strongly toward the center at the open end. Then, when the mounting screw 5 is attached to the chassis 7 and tightened with the nut 8, the bottom surface 2 of the mounting tool 1 will be in the same state as when the capacitor 6 is strongly pressed against the bottom surface 2, so the capacitor 6 is firmly fixed. Rotation and vertical movement can be easily prevented.

As shown in FIG. 3, if the mounting screw 15 is made into a missing circle and the mounting hole of the chassis is formed to match this, rotation can be completely prevented, and the polarity of the missing circle and the capacitor can be determined in advance. If you match them, the danger of installing them with the polarity reversed will be greatly reduced.

As mentioned above, by using the resin mount for capacitors of the present invention, sufficient insulation can be maintained between the capacitor and the chassis without using an insulating sleeve. is also no longer necessary. Furthermore, the installation work is very simple, as all that is required is to insert the capacitor into the cylindrical portion of the fixture and tighten the mounting screw with a nut. Furthermore, since the mounting device tightens the mounting screw with a nut, there is no need for a tongue piece or the like on the outside of the mounting device for attaching it to the chassis, which is required in the conventional case, and there is an advantage that the mounting area can be reduced.

[Brief explanation of the drawing]

The drawings all show examples of the present invention, and Fig. 1 is a front sectional view showing a resin fitting, Fig. 2 is a partial front sectional view showing a state in which a capacitor is inserted into the resin fitting and attached to the chassis, and Fig. FIG. 3 is a bottom view showing another embodiment of the resin fitting. 1... Resin fitting, 2... Bottom, 3... Cylindrical portion, 4... Small protrusion, 5... Mounting screw, 6... Capacitor, 7... Chassis, 8... Nut.

Claims (1)

[Claims for Utility Model Registration] (1) A bottom surface that is tapered so that the center of the inner surface is higher, a cylindrical portion that is formed integrally with the bottom surface and has small protrusions on the inner surface, and a mounting screw provided on the outside of the bottom surface. A resin fitting for capacitors characterized by: (2) The resin mounting fixture for a capacitor according to claim (1) of the utility model registration claim, wherein the mounting screw is a missing circle.