Electrical connectors – Including or for use with coaxial cable – Adapted to join cable conductors to different type conductors
Reexamination Certificate
2000-09-06
2001-11-06
Sircus, Brian (Department: 2839)
Electrical connectors
Including or for use with coaxial cable
Adapted to join cable conductors to different type conductors
Reexamination Certificate
active
06312287
ABSTRACT:
The invention relates to a coaxial connector adapted to be mounted at a printed circuit board, having one or several double coaxial contacts which on one side comprise a plug-in connecting end and on the other side, towards the printed circuit board, a connecting end, the coaxial contact being comprised of an electrically conductive outer jacket and a signal contact being formed in one part and being isolated with respect to the outer jacket by means of a dielectric.
Coaxial connectors adapted to be soldered to a printed circuit board are known from the brochure “har-pak, High Density Connector System, 26 6, MO/16.10.98/6.0” of Harting, which however are not suitable for the SMT technique. These coaxial connectors are provided with press-in contacts, and the mechanical attachment on the printed circuit board is achieved by means of press-in pins.
Coaxial connectors adapted to be mounted at a printed circuit board and suitable for the SMT technique are known from the Siemens company brochure “Eine Verbindung, die voller Vorteile steckt, Siemax—der erste Multi Koax-Steckverbinder, Ausgabe: December 1998”.
It is there provided that the complete coaxial connector is positioned on the printed circuit board for reflow soldering. In order to ensure that the reflow soldering technique can be used and in order to allow an inspection of the soldered points, the signal connector must not be completely shielded. This, however, limits the transmission characteristics.
As the connector protrudes over the printed circuit board edge and the regular limit which is set by the measurements of the printed circuit board is exceeded, additional steps are required during soldering.
The problem with connectors with SMT terminals and adapted to be mounted at the edge of printed circuit boards is that the pressing and traction forces of the complementary connector must under no circumstances act on the soldering pads as these, due to their low holding strength, would be torn from the printed circuit board, Rather, measures are to be taken for a strong mechanical attachment of the edge connector to the printed circuit board.
The object of the invention is to improve a coaxial connector of the type mentioned above so that at least the signal contacts are provided with SMT terminals and that an automatic standard mounting process can be used without requiring special measures with respect to an edge connector for a printed circuit board. Further, a reliable and endurable contact is to be achieved, even in cases of different expansion coefficients, during a temperature rise, and the coaxial connector is nevertheless to be mechanically fixed to the printed circuit board in. Furthermore, the signal contacts are to be completely shielded for higher transmission speeds.
This object is achieved by forming the connecting end of a signal contact in a plug-like manner and by inserting the connecting end into a contact sleeve which is held at a printed circuit board and is electrically connected thereto, the signal contact being connected in an electrically conductive manner with the printed circuit board.
Advantageous details of the invention are defined in claims
2
to
10
.
The advantages achieved with the invention are in particular that the coaxial connector, due to the good shielding effect, reliably transmits even signals with higher frequency. The improved shielding is achieved by having the shield of the entire coaxial connector reach all the way down to the printed circuit board in a closed manner.
Further, the coaxial connector formed as edge connector for a printed circuit board can be mounted at the printed circuit board and subsequently soldered thereto in a reflow technique in a fully automatic manner without special measures of precaution, with the visual inspection of the soldering points being highly simplified as the soldering points at the printed circuit board are directly accessible. An improved mounting of the coaxial connector is the result of a division of the coaxial connector into a contact carrier housing having the double coaxial contacts, and a carrier frame having contact sleeves by means of which the signal contacts to be soldered are fixed to the printed circuit board. A significant advantage of this invention is that a reliable and endurable contact is achieved even in case of different material expansion of the coaxial connector and the printed circuit board during operation as the contact end of the signal contact formed as spherical heads in cooperation with correspondingly formed contact sleeves allow a compensation. Further, a good mechanical strength is ensured since the signal contacts and the contact carrier housing are fixed at the printed circuit board independent of each other.
REFERENCES:
patent: 4099615 (1978-07-01), Lemke et al.
patent: 4887981 (1989-12-01), Damon et al.
patent: 5516307 (1996-05-01), Cartesse et al.
patent: 5577935 (1996-11-01), Harting et al.
patent: 5791937 (1998-08-01), Kitajima et al.
patent: 5842872 (1998-12-01), Hosler et al.
patent: 5982186 (1999-11-01), Buschbom
patent: 0 555 933 A1 (1993-08-01), None
Berghorn Manfred
Harting Dietmar
Pape Gunter
Cook Alex McFarron Manzo Cummings & Mehler, Ltd.
Duverne J. F.
Harting KGAA
Sircus Brian
LandOfFree
Coaxial plug connector does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Coaxial plug connector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coaxial plug connector will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2618158