JPH0121548Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a feedthrough capacitor, and particularly relates to an improvement in the attachment portion to a chassis or the like.

As shown in FIG. 1, the feedthrough capacitor has electrodes 2 and 3 provided on the inner and outer surfaces of a main body 1 formed in a cylindrical shape.
The basic structure is that a through terminal 4 inserted into the main body 1 is connected to an internal electrode 3 by solder.

The feedthrough capacitor is installed by inserting the main body 1 into a through hole B provided in the chassis plate A and connecting the external electrode 2 to the chassis plate A.

Incidentally, in order to attach the feedthrough capacitor to the chassis plate A, a mounting portion 5 is provided on the outer periphery of the main body 1.

This mounting part 5 has a structure using a separate metal fitting as shown in FIG. 1, and a structure using a separate metal fitting as shown in FIG.
There is a structure in which the outer periphery of the upper end is formed with a large diameter.

The conventional mounting portion 5, whether using metal fittings or having an integral structure, has been formed into a circular shape with a diameter larger than the outer diameter of the main body 1.

For this reason, the outer diameter R of the mounting portion 5 becomes the minimum pitch when attaching the feedthrough capacitor to the chassis plate A (see Figures 3 and 4), and the mounting density becomes low, making it ideal for downsizing electronic equipment. The reality is that this has become a hindrance.

This idea was made in view of the above points, and the planar shape of the mounting part provided on the main body of the feedthrough capacitor is formed horizontally long, and the width of the short side of this mounting part is equal to the outer diameter of the main body. It is an object of the present invention to provide a feedthrough capacitor which can be made substantially equal in size and whose mounting pitch to a chassis can be narrowed to approximately the diameter, thereby making it possible to downsize electronic equipment.

Hereinafter, embodiments of this invention will be described based on FIGS. 5 to 7 of the accompanying drawings.

The illustrated example is an example applied to a feedthrough capacitor in which the mounting portion 5a is integrally provided on the outer periphery of the upper end of the cylindrical body 1. The side width L is approximately equal to the outer diameter of the main body 1.

The attachment portion 5a can be formed, for example, at the same time as molding, or by providing a circular large-diameter step on the outer periphery of the upper end of the main body 1, and cutting both sides of this step along the outer diameter of the main body 1. Bye.

Although not shown, the mounting portion 5a may be formed of a separate metal fitting. In this case, the metal fitting is formed into an elliptical shape and is attached by fitting the central through hole into the cylindrical body 1.

The width of the short side of this metal fitting is made as close as possible to the outer diameter of the cylindrical main body 1.

The feedthrough capacitor of this invention has the above-mentioned structure, and has a mounting portion 5a provided on the outer periphery of the cylindrical body 1.
is horizontally long in plane and its short side width is approximately equal to the outer diameter of main body 1, so when it is mounted on chassis plate A, it is approximately the same diameter as main body 1, as shown in Figures 6 and 7. For example, conventional feedthrough capacitors could only be mounted at a pitch of 2.54mm, but the feedthrough capacitors of this invention can be mounted at a pitch of 2.16mm.

As described above, according to this invention, in the feedthrough capacitor, the planar shape of the mounting part provided on the outer periphery of the cylindrical body is made horizontally long, and the width of the short side is made approximately equal to the outer diameter of the body, so that the The capacitor can be mounted in a narrow pitch without compromising its performance, allowing for the miniaturization of electronic equipment that incorporates feedthrough capacitors, and requiring changes to the shape of electronic equipment that could not incorporate conventional feedthrough capacitors. This has the effect of making it possible to incorporate it without any problems.

[Brief explanation of the drawing]

Figures 1 and 2 are partially cutaway front views showing conventional feedthrough capacitors, Figure 3 is a cross-sectional view of the same mounted on a chassis board, Figure 4 is a plan view of the same, and Figure 5 is a diagram of this invention. FIG. 6 is a perspective view showing the feedthrough capacitor, FIG. 6 is a front view of the same mounted on a chassis plate, and FIG. 7 is a plan view of the same. 1... Capacitor body, 2... External electrode, 3...
...Internal electrode, 4...Through terminal, 5...Mounting part.

Claims (1)

[Scope of utility model registration request] A feedthrough capacitor characterized in that a mounting portion provided on the outer periphery of a cylindrical body in the feedthrough capacitor has a horizontally elongated planar shape, and the width of the short side of the mounting portion is approximately equal to the outer diameter of the cylindrical body.