Electrical connectors – Electromagnetic or electrostatic shield – Multi-part shield body
Reexamination Certificate
1999-12-21
2001-05-22
Bradley, Paula (Department: 2833)
Electrical connectors
Electromagnetic or electrostatic shield
Multi-part shield body
C439S607070
Reexamination Certificate
active
06234841
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to an electric connector, and more specifically to a metal shield and connector body arrangement for an electric connector, which effectively eliminates external electromagnetic waves, positively guides static electric charges to the ground terminal.
A variety of computer peripheral apparatus (such as keyboard, mouse, modem, digitizer, etc.) may be used with a computer. The circuit (master) board in the mainframe of a computer must be provided with a variety of connectors, so that different computer peripheral apparatus can be installed. During signal transmission, noises may be produced at the electric connectors on the circuit board. These noises may come from ambient electromagnetic waves, or static electricity in the electric connectors. In order to eliminate the interference of noises, an electric connector must be provided with metal shielding means.
FIGS. 7 and 8
show an electric connector according to the prior art. This structure of electric connector comprises a connector body, and a metal shielding structure mounted on the electrically insulative shell of the connector body. The metal shielding structure is comprised of two metal shields, and a grounding plate. This metal shielding structure is somewhat functional, however its installation procedure is complicated, and its manufacturing cost is high.
SUMMARY OF THE INVENTION
The present invention has been accomplished under the circumstances in view. It is one object of the present invention to provide a metal shield and connector body arrangement for an electric connector, which effectively eliminates the interference of external electromagnetic waves and internal static electricity. It is another object of the present invention to provide a metal shield and connector body arrangement for an electric connector, which is inexpensive to manufacture. To achieve these and other objects of the present invention, there is provided a metal shield and connector body arrangement, which comprises a metal shield covered on a connector body, and a metal spring plate retained between the connector body and the metal shield. The metal shield is comprised of a crossed metal sheet bent into a hollow case having a bottom open side for covering on the connector body, and a protruding grounding strip for connection to a grounding terminal on a circuit board to which the connector body is connected. The metal spring plate comprises two protruding grounding strips respectively extended out of respective insertion slots at the metal shield for connection to the metal shell of the mainframe of the computer, and arched (or annular) locating arms respectively engaged into a respective annular groove at the front side wall of the connector body around a respective receptacle in the connector body for contact with the metal shell of an electric plug connector being connected to the connector body. The locating arms each comprise a plurality of locating strips with a respective raised retaining portion for positive contact with the metal shell of the electric plug connector installed in the connector body.
REFERENCES:
patent: 5178562 (1993-01-01), Ermini
patent: 5288248 (1994-02-01), Chen
patent: 5913698 (1999-06-01), Keng
patent: 5984727 (1999-11-01), Wu et al.
Chang Chih-Kai
Hsu Chin-Hsien
Bradley Paula
Bushnell , Esq. Robert E.
Ngandjui Antoine
Tekcon Electronics Corp.
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