Electrical connectors – With circuit component or comprising connector which fully... – Connector includes or covers additional component
Patent
1992-04-09
1993-09-21
Desmond, Eugene F.
Electrical connectors
With circuit component or comprising connector which fully...
Connector includes or covers additional component
439 95, H01R 1366
Patent
active
052463877
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a filter plug connector having a strip body which is composed of insulating material and forms a chamber which is open at the rear side, having a number of parallel connector pins which are arranged in a grid and enter the chamber from the rear side and which emerge through the base of the chamber to the front side of the strip body, at least some of the connector pins being conducted through an aperture in a ferrite core arrangement inside the chamber and being connected to a capacitive filter element at the rear side of the chamber, and having a shielding casing covering the side walls and at least part of the rear side of the strip body and of the chamber with passage for the connector pins.
2. Description of the Related Art
In such filter plug connectors, the ferrite cores slipped onto certain connector pins serve, together with bushing-type capacitors which are arranged, for example, in the region of the shielding plate, to decouple electromagnetic interferences. In order at the same time to position and to mount the ferrite bodies, which have relatively large tolerances for production reasons, in the correct position and without play, it is known and usual to glue said ferrite bodies into the strip body of the connector. From German Published Application 3 016 315 it is furthermore known to fix filter tubes on the connector pins by filling the chamber in the strip body penetrated by the connector pins completely with curable casting compound. However, both methods give rise to laborious manufacturing steps and, in particular, the curing of the glue or of the casting compound is associated with a time loss in mass manufacture.
To mount and make contact to the capacitive filter elements, provision is made in the case of the filter plug connector according to German Published Application 3 016 315 to connect via the solder joints in at least two planes, on the one hand, the individual capacitors to the individual connector pins and, on the other hand, a common electrode of the capacitor arrangement to a conducting plate and, consequently, to the shielding casing. These various soldering operations also give rise to an expensive production of the filter plug connector.
SUMMARY OF THE INVENTION
of the invention is to design a filter plug connector of the type mentioned at the outset in such a way that it can be produced with as few individual parts and with as few and as simple assembly steps as possible, it being possible, in particular, to position and fix the filter elements in the strip body in a simple manner.
According to the invention, this object is achieved in that the ferrite core arrangement is held without play in the axial direction of the connector pins by means of plastic spring elements.
As a result of the mounting, according to the invention, of the ferrite core arrangement by means of plastic spring elements, the ferrite core arrangement, whether it is now formed from single tubes or from a common block, is held and secured in the correct position. For this positioning, the individual ferrite bodies do not need either to be glued or embedded in casting compound. Said ferrite core arrangement is secured in its final position solely by being slipped onto the connector pins and by closing the chamber with the shielding plate. Expediently, at least as many individual spring elements are provided in this arrangement as individual ferrite bodies are present, so that each ferrite body is individually pressed against the base of the connector chamber or against the shielding casing.
In an advantageous embodiment, the spring elements are arranged in the base region of the chamber so that they pretension the ferrite core arrangement against the shielding casing at the rear side of the strip body. It is particularly advantageous, however, if the spring elements are formed onto the strip body as a single piece so that manufacture and assembly of an additional part are unnecessary.
The ferrite core arrangement can be f
REFERENCES:
patent: 3200355 (1961-11-01), Dahlen
patent: 3538464 (1963-08-01), Walsh
patent: 4761147 (1988-08-01), Gauthier
patent: 4784618 (1988-11-01), Sakamoto et al.
patent: 4791391 (1988-12-01), Linnell et al.
Liebich Ernst
Schneider Karl
Desmond Eugene F.
Siemens Aktiengesellschaft
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