JPS5915067Y2 - Feedthrough capacitor - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a through-type container.
This relates to the mounting structure of the through conductor.

A conventional feedthrough capacitor, as illustrated in Fig. 1,
The electrode 2a of the ceramic container 2 formed in the shape of a disk is soldered 3 on the bottom inner surface of the stepped cylindrical external terminal 1, and the through hole 4 provided in the center of the ceramic container 2 is soldered 3.
The through conductor 5 penetrating through the inside is soldered 6 to the other electrode 2b of the ceramic capacitor 2, and the area around the magnetic capacitor 2 in the external terminal 1 is filled with a synthetic resin 7 to increase the dielectric withstand voltage of the magnetic capacitor 2, It had a structure that ensured moisture resistance.

However, the above-described feedthrough capacitor had the following drawbacks because the feedthrough conductor 5 was in the shape of a straight rod such as a round bar.

(1) The through conductor 5 is connected to the electrode 2b of the ceramic capacitor 2.
When soldering 6, the through conductor 5 becomes misaligned,
This tends to cause variations in the mounting position of the through conductor 5 and a decrease in soldering strength.

(2) Due to the stress generated during curing and shrinkage of the insulating resin 7 or during heat cycle tests, gaps or peeling may occur between the through conductor 5 and the electrode 2b of the ceramic capacitor 2, resulting in poor insulation voltage characteristics. Moisture resistance may deteriorate, or in the worst case, electrical continuity between the electrode 2b and the through conductor 5 may become incomplete, impairing its function as a capacitor.

The present invention eliminates the above-mentioned drawbacks of the conventional method, and allows the through conductor to be easily and reliably positioned relative to the magnetic capacitor.Moreover, the mechanical and electrical coupling between the two is strong, and there is no gap or peeling, resulting in high reliability. The purpose of the present invention is to provide a through-type container with a high degree of flexibility.

In order to achieve the above object, the present invention provides a feedthrough type capacitor in which a through conductor passing through the through hole is electrically connected to one of the electrodes of the capacitor, which has electrodes on each side of the capacitor having a through hole. , the through conductor has a bent protrusion that contacts one of the electrodes.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The content of the present invention will be specifically described below with reference to the accompanying drawings, which are examples.

FIG. 2A is a front partial sectional view of the feedthrough capacitor according to the present invention, and FIG. 2B is a side partial sectional view.

In the figures, the same reference numerals as in FIG. 1 indicate functionally identical components.

As shown in the figure, in the present invention, the through conductor 5, which was conventionally made of a round bar metal material, is made of a metal plate material, and a bent protrusion 5a is attached to the part connected to the electrode 2b of the ceramic capacitor 2. .

5b, the bent protrusions 5a and 5b are brought into contact with the surface of the electrode 2b, and the soldering is fixed.

In forming the bent protrusions 5 a and 5 b, as shown in the developed view of FIG. 3A, a narrower through-hole terminal portion 5 d is connected below the tab terminal 5 C which is formed relatively wide. At the same time, cut grooves 8 and 9 are provided on both sides of the connecting portion between the tab terminal portion 5C and the through terminal portion 5d to form the tongue pieces 5a and 5b, and the tongue pieces 5a and 5b are formed into the cut groove 8. At the base of .9, bend it in opposite directions along the dotted line 49.

As a result, as shown in FIGS. 3B and 3C, bent protrusions 5a and 5b that are bent in opposite directions are formed on both sides of the connecting portion between the tab terminal 5C and the through terminal portion 5d.

The above steps can be performed in one step by press working or the like.

With the structure as described above, the electrode 2 of the ceramic capacitor 2
b becomes the supporting surface of the bent protrusions 5 a and 5 b, and the electrode 2 b
By simply bringing the bent protrusions 5a and 5b into contact with each other, the through conductor 5 can be reliably positioned with respect to the ceramic container 2 without causing any misalignment, making the positioning work very easy and It will definitely be done.

In addition, a surface contact portion is formed between the bent protrusions 5a, 5b and the electrode 2b, and when both are fixed by soldering, a very strong bonding force is obtained, so that when the insulating resin 7 hardens and shrinks, Alternatively, the occurrence of gaps, peeling, etc. due to stress during a heat cycle test is prevented, and dielectric withstand voltage characteristics, moisture resistance, etc. are significantly improved.

Furthermore, since it can be easily manufactured from a single plate by press working or the like, it can be mass-produced and is inexpensive.

As described above, the present invention provides a capacitor in which electrodes are provided on both sides of the capacitor, each of which has a through hole.
In the through-hole type container in which the through-hole conductor is electrically connected, the through-hole conductor is characterized in that the through-hole conductor has a bent protrusion that is in contact with one of the electrodes, so that positioning of the through-hole conductor with respect to the capacitor is easy. It is easy and reliable, and the mechanical and electrical bonding strength between the two is strong.
It is possible to provide a highly reliable feed-through capacitor that does not cause gaps or peeling due to stress during curing and shrinkage of the filled insulating resin or during heat cycle tests.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of a conventional through-type container, Figure 2A
is a front partial sectional view of the through-type container according to the present invention,
FIG. 2B is a partially sectional side view thereof, FIG. 3A is a developed view of the through conductor according to the present invention, FIG. 3B is a front view thereof, and FIG. 3C is a side view thereof. 1...External terminal, 2...Capacitor,
2 a, 2 b...electrode, 4...through hole, 5...through conductor, 5a, 5b...
- Bent protrusion.

Claims (1)

[Scope of utility model registration request] In a feed-through type capacitor, a through conductor passing through the through hole is electrically connected to one of the electrodes of a capacitor having an electrode on both sides of which the through hole is opened, and the through conductor is connected to one of the electrodes. A feed-through capacitor characterized by having bent protrusions in contact with each other.