Electrical connectors – With stress relieving means for conductor to terminal joint – Enlargement engaging means
Reexamination Certificate
1999-12-29
2001-05-15
Paumen, Gary F. (Department: 2833)
Electrical connectors
With stress relieving means for conductor to terminal joint
Enlargement engaging means
C439S616000
Reexamination Certificate
active
06231374
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a cable end connector, and particularly to a cable end connector having a strain relief mechanism.
Taiwan Patent Application Nos. 81,201,975, 83,211,903 and U.S. Pat. No. 4,929,195 each discloses a conventional cable end connector. The conventional cable end connector comprises an upper cover, a lower cover, a circuit board and a stopper. A cable comprises a plurality of core wires which are soldered to the circuit board and received in the cable end connector. The stopper is integrally formed with an insulative coating covering the cable. An annular groove is formed in the surface of the stopper to engage with the covers. When an external force is exerted on the cable, the stopper transmits the force to the covers, thereby preventing the core wires from separating from the corresponding circuit board.
However, during signal transmission, the core wires are subjected to EMI (electromagnetic interference). The conventional cable end connector can not provide a reliable grounding element for discharging static electricity accumulated on the cable. Therefore, signal transmission is adversely effected.
BRIEF SUMMARY OF THE INVENTION
A main object of the present invention is to provide a cable end connector having a strain relief mechanism for providing a reliable connection between a cable and the cable end connector, and preventing signal transmission from being adversely effected by EMI thereby ensuring reliable signal transmission.
To fulfill the above-mentioned object, a cable end connector in accordance with the present invention comprises an upper and a lower metal cover. The upper and lower metal covers jointly define an circular opening. A cable comprises an insulative coating, a shielding braid and a plurality of core wires. These core wires are received in the cable end connector. A strain relief mechanism comprises a grounding ring and a strain relief. The grounding ring includes a ring body and a pair of contacting wings extending from opposite edges thereof. The strain relief includes a stepped portion and a circular body. An annular groove is formed between the circular body and the stepped portion for accommodating the grounding ring. A circular band of insulative coating is removed from the cable to expose a band of circular shielding braid. The grounding ring is riveted and soldered to the shielding braid then electrically conducted between the edge of the openings and the shielding braid. In assembly, the strain relief is integrally formed with the insulative coating. The edge of the opening of the covers is received in the annular groove and electrically contacts the contacting wings for discharging static electricity accumulated on the shielding braid to the covers. Resilient latches extend from the contacting wings for reliably contacting the metal cover.
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patent: 5108313 (1992-04-01), Adams
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patent: 5609499 (1997-03-01), Tan et al.
patent: 5797771 (1998-08-01), Garside
Chung Wei Te
Hon Hai - Precision Ind. Co., Ltd.
Paumen Gary F.
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