JPH0132735Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a resin-cased capacitor with an improved opening outer shape.

Generally speaking, capacitors are attached to various types of equipment by attaching them to the mounting parts of the various types of equipment via separate mounting feet.
In recent years, with the aim of simplifying installation, a case 2 has been developed in which a holder part made of resin molding is provided with a chucking part 1 consisting of a groove around an opening that matches the holder part (not shown), as shown in Figure 1. The chucking portion 1 of the capacitor 3 is fitted therein. However, in this case, apart from when the case 2 is made of metal, if it is made of resin, it undergoes an indefinite amount of thermal contraction due to the heating action not only during the manufacture of the case 2 itself but also during the capacitor manufacturing process, resulting in large dimensional variations. In some cases, the fixation to the holder (not shown) becomes loose, making it unsuitable for use in, for example, washing machines with large vibrations. For this reason, it may be possible to make it larger by assuming heat shrinkage in advance, but this has the disadvantage that it is difficult to keep the shrinkage rate constant, making it extremely difficult to fit into the holder part (not shown).

The present invention has been made in view of the above points, and provides a capacitor that improves the workability of fitting into the holder part by improving the outer shape of the opening of the resin case, and also ensures reliable fixing work. The purpose is to

An embodiment of the present invention will be described below with reference to the drawings. That is, as shown in FIG. 2, a resin case 11 is provided around the opening with a chucking collar portion 1 having a diameter larger than that of the case 11 and having a concave cross section with an open upper part.
2 and a fitting groove 13 around the tracking collar 12. For example, a metallized film capacitor element 14 is housed in the resin case 11, and a lead-out terminal 15 is connected to the capacitor element 14. is pulled out from the opening of the resin case 11, and then the cavity of the resin case 11 is filled with a sealing resin 16 to form a capacitor 17.

Therefore, the capacitor 17 constructed as described above is used by fitting the chucking collar portion 12 having the fitting groove 13 around the periphery into the holder portion 18 which is configured as a fixture as shown in FIG. However, since the chucking collar 12 has a concave cross section with an open top, even if it is made larger, the tip of the chucking collar 12 will bend inward when mating, making it easy to fit without requiring strict dimensional accuracy. At the same time, the chucking collar portion 12, which is bent inward during fitting, returns to its original shape after fitting, and a reliable fixed state can be obtained.

Note that, as shown in FIGS. 4 and 5, the chucking collar 2 provided around the opening of the resin case 19
If a structure is adopted in which a plurality of notches 21 are provided in the vertical direction around 0, the fitting operation to the holder part (not shown) can be performed more effectively. 22 in the diagram
is a fitting groove. Further, in the above embodiments, the shape of the resin case is circular, but it goes without saying that the shape of the resin case is not limited to this.

As described above, according to the present invention, in a capacitor in which a capacitor element is housed in a resin case and the cavity of the resin case is filled with a sealing resin, an upper part with a larger diameter than the case is opened around the resin case opening. By providing the chucking collar portion having a concave cross-section, it is possible to obtain a capacitor that can improve the workability of fitting into the holder portion and also ensure a secure fixing state.

[Brief explanation of the drawing]

Fig. 1 is a front view showing a capacitor according to a conventional reference example, Fig. 2 is a front sectional view showing a capacitor according to an embodiment of the present invention, and Fig. 3 is a state in which the capacitor shown in Fig. 2 is fitted into a holder. FIGS. 4 and 5 are front sectional views showing resin cases according to other embodiments of the present invention, with FIG. 4 being a front view and FIG. 5 being a plan view. 11, 19... Resin case, 12, 20... Chucking collar portion, 13, 22... Fitting groove, 14
... Capacitor element, 15 ... Output terminal, 16 ...
...Sealing resin.

Claims (1)

[Scope of utility model registration request] comprising a bottomed cylindrical resin case, a chucking collar portion provided around the opening of the case and having a larger diameter than the case and a concave cross section with an open top, and a fitting groove provided around the collar portion; A capacitor characterized in that a capacitor element with a lead-out terminal connected is housed in the resin case, and the capacitor element is filled and buried with a sealing resin.