Electrical connectors – Including or for use with coaxial cable – Adapted to join cable conductors to different type conductors
Patent
1993-03-22
1996-12-03
Pirlot, David L.
Electrical connectors
Including or for use with coaxial cable
Adapted to join cable conductors to different type conductors
439 63, H01R 907
Patent
active
055802761
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a coaxial plug connector component for connection to a printed circuit board, and particularly to a connector having a central connecting pin which is connected to an inner conductor and at least two peripheral connecting pins which are connected to a hollow-cylindrical outer conductor in each case being provided with a push-in zone for attachment in a respective hole in the printed circuit board.
DESCRIPTION OF THE RELATED ART
A plug connector component of this type having push-in pins is disclosed in German utility model 89 07 785. The push-in pins make it possible to produce a non-soldered connection between the coaxial plug connector and printed circuit board wiring. However, the problem exists that a gap in the radio-frequency shielding occurs in the region between the peripheral connecting pins. As a result of the tolerance during pushing into the printed circuit board, the gap cannot be completely closed by corresponding lengthening of the hollow-cylindrical outer conductor.
SUMMARY OF THE INVENTION
An object of the invention is therefore to provide a coaxial plug connector of the type mentioned initially such that reliable radio-frequency blocking is achieved even in the region of the push-in pins on the printed circuit board.
This and other objects are achieved according to the invention in that a shielding sleeve is held on the peripheral connecting pins, in the region between the push-in zones of the connecting pins and the outer conductor, such that the sleeve can move in the axial direction, the inwardly pointing edge of which shielding sleeve overlapping the outer conductor coaxially.
As a result of the moveable shielding sleeve, once the connecting pins have been pushed into the holes of the printed circuit beard without being soldered, r.f.-proof shielding for the inner conductor is achieved by the present invention in every case and independently of the magnitude of the tolerances. The shielding sleeve expediently has longitudinal grooves in its circumference which are parallel to the axis and in which the peripheral connecting pins are guided such that the connecting pins along the grooves relative to the sleeve with a push fit. As mentioned, at least two peripheral connecting pins are provided for symmetry reasons, on which the shielding sleeve can be guided via two corresponding longitudinal grooves. Three or even more such connecting pins can, of course, be provided, with a corresponding number of grooves being provided in the shielding sleeve.
In one expedient embodiment, the shielding sleeve has a first section with a greater wall thickness in order to form a larger end contact surface on the printed circuit board for the purpose of r.f.-proof shielding, and a second section with a smaller wall thickness in order to make overlapping contact with the outer conductor. This second section can be split at least over a part of its axial length into a plurality of resilient tabs for making contact with the outer conductor. In principle, it is possible to design the second section of the shielding sleeve such that it is plugged over the outside of the outer conductor. However, in a preferred embodiment, this second section has a reduced diameter so that it projects into an annular cavity between the outer conductor and the inner conductor, or the insulation surrounding the inner conductor. In order to complete the r.f.-blocking, the end surface of the shielding sleeve points toward the printed circuit board and is additionally expediently provided with coaxial ridges. These ridges provide a reliable contact with the printed circuit board surface and hence ensure radio-frequency blocking.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention is explained in more detail in the following text using an exemplary embodiment and the drawing, in which:
FIG. 1 shows a coaxial plug connector component partially cut, mounted in a printed circuit board
FIG. 2 shows a bottom view of the plug connector component of FIG. 1, seen in the direction II from
REFERENCES:
patent: 4412717 (1983-11-01), Monroe
patent: 4588241 (1986-05-01), Ardezzone
patent: 4718854 (1988-01-01), Capp et al.
patent: 4795352 (1989-01-01), Capp et al.
patent: 5145408 (1992-09-01), Houttenman et al.
Pirlot David L.
Siemens Aktiengesellschaft
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