Electrical connectors – Preformed panel circuit arrangement – e.g. – pcb – icm – dip,... – Distinct contact secured to panel circuit
Reexamination Certificate
1995-09-26
2001-03-20
Abrams, Neil (Department: 2839)
Electrical connectors
Preformed panel circuit arrangement, e.g., pcb, icm, dip,...
Distinct contact secured to panel circuit
C439S607070, C439S747000
Reexamination Certificate
active
06203336
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a socket-type multipolar electrical connector to be used together with its counter connector or plug-type multipolar electrical connector, and more particularly to a socket-type multipolar electrical connector in which, without hindrance for various types of signal processings, the pitch between each adjacent contact piece of a plurality of contact pieces is minimized to miniaturize the connector with the density of the contact pieces increased, so that the connector can be mounted directly on a printed circuit board.
2. Description of the Prior Art
When a socket-type multipolar electrical connector is used together with its counter connector or plug-type multipolar electrical connector in which all the terminal pins are arranged in a predetermined assembly pattern with a high density, the socket-type multipolar electrical connector is such that all the contact pieces thereof corresponding to the terminal pins are also arranged in the same assembly pattern with a high density.
There is conventionally known a socket-type multipolar electrical connector capable of satisfying the requirement mentioned above, which has contact piece groups comprising a plurality of contact pieces all of which are assembled with the body of the connector with the horizontal pitch between each adjacent contact piece being fine.
On the other hand, it is recently required to execute a variety of signal processings using a composite cable in which a braided shell shield surrounds various types of conductors (core wires, twisted wires and the like) having different diameters.
When a plug-type multipolar electrical connector is used satisfying the requirement mentioned above, i.e., an electrical connector of the type mentioned earlier in which all the terminal pins are arranged in a predetermined assembly pattern with high density, a problem arises in that it becomes difficult to provide the space necessary for connecting (by soldering or calking) the respective conductors of the composite cable to the respective terminal pins. The same problem also resides in a socket-type multipolar electrical connector.
There is known the technique discussed in Japanese Utility Model Application No. 4-15664, which corresponds to copending commonly owned copending application, Ser. No. 08/022,318, filed Feb. 23, 1993. This technique relates to a plug-type multipolar electrical connector which facilitates the wire handling of connecting the respective conductors having different diameters of a composite cable to respective terminal pins, yet enabling the electrical connector to be miniaturized with the density of the terminal pins increased. More specifically, this plug-type multipolar electrical connector is arranged such that the terminal pins are divided into a terminal pin group for thin conductors and a terminal pin group for thick conductors, the horizontal pitch between each adjacent terminal pin of the terminal pin group for thin conductors is fine, the horizontal pitch between each adjacent terminal pin of the terminal pin group for thick conductors is coarse. The terminal pin group for thin conductors is disposed at the center of the body made of an insulating material, and the terminal pin group for thick conductors is disposed at a lateral side of the terminal pin group for thin conductors.
SUMMARY OF THE INVENTION
The present invention is proposed in view of the foregoing.
It is an object of the present invention to provide a socket-type multipolar electrical connector which can be used together with, as its counter connector, a plug-type multipolar electrical connector as shown in Japanese Utility Model Application No. 4-15664 which comprises a terminal pin group for thin conductors in which the horizontal pitch between each adjacent terminal pin is fine, and a terminal pin group for thick conductors in which the horizontal pitch between each adjacent terminal pin is coarse, the terminal pin group for thick conductors being disposed at a lateral side of the terminal pin group for thin conductors.
It is another object of the present invention to provide a socket-type multipolar electrical connector which is effectively restrained from being increased in size to meet the demand for a miniaturized connector.
It is a further object of the present invention to provide a socket-type multipolar electrical connector having an excellent shielding function as an anti-noise (electrical noise) measure.
It is still another object of the present invention to provide a socket-type multipolar electrical connector excellent in maneuverability of attaching to and removing from its counter connector or plug-type multipolar electrical connector and also excellent in preventing the socket-type multipolar electrical connector attached to its counter connector from being unexpectedly disconnected therefrom.
To achieve the objects mentioned above, the present invention provides a socket-type multipolar electrical connector having a body made of an insulating material in which contact piece groups having a plurality of contact pieces are assembled. This socket-type multipolar electrical connector is characterized in that the contact piece groups comprise: a first contact piece group including a plurality of first contact pieces which are disposed in the body at the center thereof with the horizontal pitch between each adjacent contact piece being fine; and a second contact piece group including a plurality of second contact pieces which are disposed in the body at a lateral side of the first contact piece group with the horizontal pitch between each adjacent contact piece being coarse.
According to the socket-type multipolar electrical connector having the arrangement mentioned above, the layout and the horizontal and vertical pitches of the plurality of first and second contact pieces forming the contact piece groups can fit in with the layout and the horizontal and vertical pitches of terminal pin groups for thin and thick conductors of a plug-type multipolar electrical connector using a composite cable. Accordingly, such a plug-type multipolar electrical connector can be used as a counter connector. Further, by connecting the plurality of first contact pieces to the thin conductors of the composite cable and by connecting the plurality of second contact pieces to the thick conductors of the composite cable, the respective contact pieces can be readily connected to the respective conductors of the composite cable having different diameters. Accordingly, the socket-type multipolar electrical connector of the present invention can be miniaturized with the density of the contact pieces increased.
According to the present invention, the socket-type multipolar electrical connector may further comprise: a first contact-piece holding hole group having a plurality of first contact-piece holding holes formed in the body and arranged at a plurality of levels in the vertical direction of the body with the horizontal pitch between each adjacent hole being fine, the first contact-piece holding holes being adapted such that terminal pins of a plug-type multipolar electrical connector are respectively inserted therein; and a second contact-piece holding hole group having a plurality of second contact-piece holding holes formed in the body at a lateral side of the first contact-piece holding hole group and arranged at a plurality of levels in the vertical direction of the body with the horizontal pitch between each adjacent hole being coarse, the second contact-piece holding holes being adapted such that terminal pins of the plug-type multipolar electrical connector are respectively inserted therein; the first contact pieces being respectively fitted in and held by the first contact-piece holding holes, and the second contact pieces being respectively fitted in and held by the second contact-piece holding holes.
According to the socket-type multipolar electrical connector having the arrangement mentioned above, the layout and the horizontal and vertical pitc
Abrams Neil
Hosiden Corporation
Jones Tullar & Cooper P.C.
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