JPS633146Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a structure for attaching a bushing to the upper surface of the can body of a can-shaped capacitor. In a can-shaped capacitor that is attached as an integral part, a ring-shaped bushing receiving member having a diameter larger than the depth of the can is attached by welding to the mounting part of the bushing on the upper surface of the can, and the bushing is attached on this receiving member. This invention relates to a can-shaped capacitor in which the lower edge of a bushing whose diameter is approximately equal to or larger than the depth of the can body is placed and fixed by welding.

Recently, there has been a trend to make capacitor bodies smaller due to improvements in dielectric materials and the like, and to further downsize the cans that house the capacitor bodies, but there is one problem. In other words, a bushing is attached to the top surface of the case that pulls the terminal out of the case, and the minimum diameter of this bushing is determined by the voltage applied to the terminal and the required mechanical strength. Currently, due to problems, the depth of the can body cannot be made smaller than the diameter of the bushing. Figure 1 shows the conventional attachment structure of bushing b to can body a. If the depth A of can body a is greater than or at least the same as the diameter B of bushing b, bushing b will not fit on top of can body a. Cannot be installed.

This idea was made in view of the above points, and by using a ring-shaped bushing receiving member whose diameter is larger than the depth of the can body, a bushing with a diameter larger than the depth of the can body can be attached. This made it possible to downsize can-shaped capacitors.

This invention will be explained in detail below using example drawings.
This invention is not limited to the following examples.

Figures 2 and 3 show the can-shaped capacitor 1 of this invention.
The bushing 3 is attached to the upper surface of the can body 2 via a bushing receiving member 4 (adapter). Figure 4 is the second
The cross-sectional structure of the attachment part of the bushing 3 to the can body 2 in the section CC of the figure is shown. The bushing receiving member 4 is an annular body made of iron consisting of a vertical portion 5 and a horizontal portion 6. The lower end 7 of the vertical portion 5 is fixed to the upper surface 8 of the can body 2 by welding, and is attached to the can body 2. As shown in FIG. 3, this bushing receiving member 4 is constructed so that the outer diameter X of the horizontal portion 6 is larger than the depth width Y of the can body 2. It is positioned so as to protrude outward from the side end 2' of the body 2. The bushing 3 is made of porcelain, for example, and has a metallized layer 9 on its lower edge, and a ring-shaped mounting leg 10 is fixed to the metallized layer 9 by soldering. The lower end 10' of the mounting leg 10 constituting the lower edge of the bushing 3 is mounted on the horizontal part 6 of the bushing receiving member 4, and the mounting leg is inserted into the groove 11 provided in the horizontal part 6. The lower end 10' of 10 is positioned and fixed by soldering. If the recessed strip 11 is provided as shown in the above embodiment, the mounting leg 10 can be stably and easily fixed.

FIG. 5 shows another embodiment, in which the bushing receiving member 4
The vertical portion 5 and the horizontal portion 6 are constructed of separate members, and each is welded and integrated. If the bushing receiving member 4 is provided integrally when manufacturing the can body 2, assembly work can be easily performed.

In the above embodiment, the diameter of the bushing 3 is larger than the depth of the can body 2, but
Even if they are equal, it is still difficult to install with the conventional mounting structure that does not use a bushing receiving member, so the configuration of this invention using a bushing receiving member is sufficiently effective. It is something to do.

This invention is constructed as described above, and uses a bushing receiving member attached to the can body with a diameter larger than the depth of the can body, and the bushing is attached via this bushing receiving member, so that the bushing is attached to the can body. The depth of the capacitor is not limited by the diameter of the bushing, and thus the can body can be made smaller, and a can-shaped capacitor of the minimum required size can be obtained.

[Brief explanation of the drawing]

Figure 1 is a schematic side view of the conventional product, Figures 2 and 3 are front and side views of the embodiment of this invention, respectively.
FIG. 4 is a partial sectional view taken along the line CC in FIG. 2, and FIG. 5 is a sectional view of a main part of another embodiment. 1... Can-shaped capacitor, 2... Can body, 3... Bushing, 4... Bushing receiving member.

Claims (1)

[Scope of utility model registration request] In a can-shaped capacitor in which a capacitor body is provided in a sealed can body and a bushing is integrally attached to the top surface of the can body, a diameter larger than the depth of the can body is attached to the mounting part of the bushing on the top surface of the can body. A can-shaped capacitor in which a ring-shaped bushing receiving member is attached by welding, and the lower edge of the bushing, whose diameter is approximately equal to or larger than the depth of the can body, is placed on the receiving member and fixed by welding.