Screened electrical plug connection

Details Screened electrical plug connection Screened electrical plug connection

2000-01-28

2001-03-06

Nguyen, Khiem (Department: 2839)

Electrical connectors

Electromagnetic or electrostatic shield

Shielding individually surrounding or interposed between...

Reexamination Certificate

active

06196875

ABSTRACT:

The invention relates to a screened electrical plug connection for printed circuit boards, in particular surface-mounted plug connectors of shallow constructional type, consisting of a plug connector in which electrical connecting elements intended for making contact with pin contacts on a complementary plug connector are disposed in an insulated manner, at least one side of the plug connectors being masked with a screening plate which has connecting ends for connection to conductor tracks on a printed circuit board, and electrical contact between the screening plate of the plug connector and the screening plate of the complementary plug connector being made by means of contact elements.
Screening of electrical plug connectors is necessary in order to improve the transmission properties in the high frequency range and also to reduce, as far as possible, inherent and also extraneous interference signals.
It is known practice to screen plug connections against interference signals by means of screening parts which are to be provided in an all-round manner, contact-making taking place via contact elements in the front region in which the plug connectors touch. However, superposed contact-making has an adverse effect on the overall height of the plug connectors.
From the generic EP 0 637 858 A1, a screened electrical plug connection for printed circuit boards is known which consists of a plug connector in which there are disposed, in an insulating manner, electrical connecting elements which are intended for making contact with pin contacts on a complementary plug connector, at least one side of the plug connectors being masked with a screening plate which has connecting ends for connection with conductor tracks on a printed circuit board.
In addition, a screened plug connector for printed circuit boards is known from WO 98/09 354 A1, in which a shrouding plate is provided for screening purposes between the rows of contact elements in each plug connector, and the contact elements lie in the same plane as the shrouding plates.
The underlying object of the invention is to construct a screened plug connection of the initially mentioned type, to the effect that a screening system is provided which reduces the overall height to a minimum.
This object is achieved through the fact that the contact elements are disposed in the same plane as the screening plates and are designed as annular contact tongues which protrude from the front terminating edge of the screening plates, touching occurring via the lateral contact faces when the plug connection is joined together.
Advantageous refinements of the invention are indicated in claims
2
to
4
.
The advantages achieved with the invention particularly consist in the fact that the overall height of the plug connection is decisively reduced. Furthermore, a constant impedance profile along the signal path is obtained because of the distance, which remains the same over the entire breadth of the plug, between the plug contacts and the screening system. The spring tongues, which are of annular construction and are closed in on themselves, also exhibit a better screening effect than conventional, narrow screening tongues.


REFERENCES:
patent: 5500788 (1996-03-01), Longueville et al.
patent: 5611700 (1997-03-01), Mitra
patent: 5685738 (1997-11-01), Harting et al.
patent: 5934939 (1999-08-01), Thenaisie et al.
patent: 6042398 (2000-03-01), Wu et al.
patent: WO 98/09354 (1998-03-01), None

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