Electrical connectors – Including or for use with coaxial cable
Reexamination Certificate
2000-05-05
2001-12-25
Abrams, Neil (Department: 2839)
Electrical connectors
Including or for use with coaxial cable
C174S089000
Reexamination Certificate
active
06332807
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a connection structure between a shield electric wire and a shield terminal and a connection method therebetween.
A shield connector that is disclosed in Japanese Patent Application Laid-Open No. 8-78071 has a shield electric wire, a terminal electrically connected to a core wire of the shield electric wire, a shield terminal electrically connected to a braided wire of the shield electric wire, a housing for accommodating these elements therein, and a cap mounted on a forward end of the shield terminal.
The shield terminal and the braided wire are connected to each other by the use of the following method. The method is first to peel an insulating outer covering at one end of the shield electric wire to thereby cause the braided wire to be exposed, to fold the exposed braided wire back onto the insulating outer covering to thereby superpose this braided wire upon the insulating outer covering, and then to peel an insulating inner covering to thereby cause the core wire to be exposed. Next, the method is to pass the insulating inner covering through a terminal-retaining portion of the terminal and to caulk the terminal-retaining portion to thereby electrically connect the core wire and the terminal. Finally, the method is to insert the shield electric wire into the housing to thereby connect the shield terminal and the braided wire to each other.
The connection between the shield terminal and the braided wire is achieved through the press contacting of the braided wire with respect to a plurality of blade spring pieces disposed within the shield terminal.
SUMMARY OF THE INVENTION
However, in the above-described conventional structure, it is necessary to perform the peeling of the insulating outer covering over a wide range to thereby expose the braided wire. Therefore, the operation of eliminating the insulating outer covering is troublesome. In addition, for the purpose of preventing the braided wire and the core wire from being short-circuited, the braided wire must be cut to a prescribed length. Because the blade spring pieces are needed to be disposed within the shield terminal, the structure of the shield terminal becomes complex. When causing an increase in the blade loading of the blade spring piece in order to make the contact between this spring piece and the braided wire reliable, there is the likelihood that the braided wire will become hard to insert between the blade spring pieces. Simultaneously, there is also the likelihood that the braided wire will be dragged up and so a defective contact will occur between the braided wire and the blade spring piece. In addition, the terminal end of the braided wire becomes likely to get frayed and so the connection thereof to the shield terminal becomes more and more difficult.
Thereupon, it is an object of the present invention to provide a highly reliable connection structure that makes it possible to reliably and easily perform an electric connection between the shield terminal and the braided wire.
To achieve the above object, in the structure according to the present invention, the shield electric wire has braided wires, an outer insulating portion for covering the braided wires, and a connecting portion formed using part of the braided wires. The connecting portion is formed by drawing up the braided wires extended and exposed from the end of the outer insulating portion and collecting them together to the end thereof, and has a rib-like configuration. The shield terminal is connected to the connecting portion.
According to this construction, the rib-like connecting portion that has been formed by the braided wires being drawn near and collected together is connected to the shield terminal. Therefore, between the shield terminal and the connecting portion, there is attained a state of surface contact where the contact area between the both has been sufficiently ensured. As a result, the braided wires and the shield terminal are directly connected together. Accordingly, a stable electrical connection is obtained with a simple structure and in addition the braided wires are prevented from getting frayed.
REFERENCES:
patent: 2785384 (1957-03-01), Wickesser
patent: 5183412 (1993-02-01), Nagafuji
patent: 5607325 (1997-03-01), Toma
patent: 6-22427 (1994-01-01), None
patent: 8-78071 (1996-03-01), None
Asakura Nobuyuki
Kuwayama Yasumichi
Abrams Neil
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Yazaki -Corporation
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