Electrical connectors – With vitreous-type envelope – Having bayonet-coupling contact
Reexamination Certificate
2002-03-27
2003-12-16
Patel, Tulsidas (Department: 2839)
Electrical connectors
With vitreous-type envelope
Having bayonet-coupling contact
C439S607070
Reexamination Certificate
active
06663432
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a shielded cable connector and an electronic device that can ensure stable operation of a transmission signal and can realize low radiation noise characteristics.
BACKGROUND OF THE INVENTION
As a color, high-resolution signal is introduced as an image signal, a large amount of data is transmitted and received between circuit wiring boards and units at high speed, and use of a cable with a multi-pin connector increases as a means of interface for such data transmission and reception. When such a cable with a multi-pin connector is used particularly for signal transmission outside a device, it often causes problems in terms of radiation noise and immunity (electromagnetic interference (susceptible to it)). To prevent this, a shielded cable in which the cable portion is covered with a shield member is used. The connection state of the shield member at the connector portion, the connection state of metal members particularly when the metal shell of the connector is divided into an outer shell metal member (outer shell) and inner metal member (inner shell), and the connection state between the fitting portion of the cable-side connector and that of the board-side connector largely fluctuate the electrical characteristics to sometimes cause variations in products (variations in EMI (radiation noise) characteristics of the products). In fact, regarding the electrical connection of the connector portion, it is generally considered that it suffices if electrical connection is obtained at least at one point, and a structure that enables stable electrical connection positively is not employed. In general, the smaller the number of connection points of the shield member, the lower the quality and stability of ground connection that influences the EMI characteristics.
The non-stability of the electrical connection from the shield member to a printed wiring board or metal housing, to which a metal shell for a board-side connector is attached, is caused partly depending on the connection state between the shield member and connector metal shell. Moreover, the connection state from the metal shell of the cable-side connector, to which the shield member is connected, to the metal shell of the board-side connector may become unstable particularly when the number of pins increases to provide elongated connectors.
This non-stability may be promoted by a distortion that occurs when the cable-side connector is fitted with the board-side connector.
SUMMARY OF THE INVENTION
The present invention has been made in view of the above problems, and has as its object to provide a shielded cable connector and an electronic device that can stabilize electrical connection between a cable-side shield member and a board-side GND (ground) pattern.
In order to solve the above problems and to achieve the above object, a shielded cable connector according to the first aspect of the present invention is characterized by having the following arrangement.
More specifically, there is provided a shielded cable connector to be mounted on a shielded cable having a signal transmission line and a shield member therearound, comprising a metal outer shell member to come into direct contact with the shield member, the outer shell member comprising a contact portion extended to come into direct contact with a ground pattern of an electric board to which the shielded cable is to be connected.
A shielded cable connector according to the second aspect of the present invention is characterized by having the following arrangement.
More specifically, there is provided a shielded cable connector to be mounted on a shielded cable having a signal transmission line and a shield member therearound, comprising a metal outer shell member to come into direct contact with the shield member, the outer shell member being in direct contact with a connector for an electric board to which the shielded cable is to be connected.
A shielded cable connector according to the third aspect of the present invention is characterized by having the following arrangement.
More specifically, there is provided a shielded cable connector to be mounted on a shielded cable having a signal transmission line and a shield member therearound, characterized by comprising a metal outer shell member to come into direct contact with the shield member, the outer shell member being in direct contact with a metal housing to which a connector for an electric board, to which the shielded cable is to be connected, is attached.
An electronic device according to the present invention is characterized by having the following arrangement.
More specifically, the electronic device uses the shielded cable connector described above.
The same structure as this is apparently effective even in an ordinary cable connector for transmitting an electrical signal to a connector for a printed wiring board.
Other features and advantages besides those discussed above shall be apparent to those skilled in the art from the description of a preferred embodiment of the invention which follows. In the description, reference is made to accompanying drawings, which form a part hereof, and which illustrate an example of the invention. Such example, however, is not exhaustive of the various embodiments of the invention, and therefore reference is made to the claims which follow the description for determining the scope of the invention.
REFERENCES:
patent: 3910665 (1975-10-01), Stull
patent: 4412717 (1983-11-01), Monroe
patent: 4598961 (1986-07-01), Cohen
patent: 4605269 (1986-08-01), Cohen et al.
patent: 4664467 (1987-05-01), Tengler et al.
patent: 5046966 (1991-09-01), Snyder et al.
patent: 6210228 (2001-04-01), Simmel et al.
patent: 5-94849 (1993-04-01), None
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