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Electrical connector including insulation-opening contact
| Details |
Inventors: Mathe, Istvan; Kasper, Alan H.;
Assignee: Allied Corporation (Morris Township, Morris County, NJ)
Primary Examiner: McGlynn; Joseph H.
Assistant Examiner:
Attorney, Agent or Firm:
An electrical connector is provided with a plurality of contacts, each of the contacts having an insulation-opening terminal element of sheet metal construction to electrically contact an insulated conductor. The contact is advantageously constructed for receiving an insulated stranded conductor, but is equally applicable for receiving an insulated solid conductor. Each contact includes an active portion, of either male or female configuration, a terminal element portion, and an intermediate portion connecting the active and terminal element portions. The terminal element portion preferably includes an elongate open channel of U-shaped cross-sectional configuration having side and bottom walls, the sidewalls including opposite portions dimpled in to provide inner detents forming, and separated by, a conductor-receiving notch for opening the insulation of the conductor and electrically engaging the underlying exposed conductor. A plurality of different embodiments of a detent are offered, each of which advantageously includes an enlarged wiping surface, a notch entrance and a smooth portion adjacent the notch entrance to prevent snagging, and possibly severing, of the individual strands of a stranded conductor. |
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DETAILED DESCRIPTION The primary object of the invention, therefore, is to provide an electrical connector having insulation-opening contacts which overcome the aforementioned problems concerning snagging and/or severing of the individual strands of an insulated stranded conductor.
Another object of the invention is to provide an insulation-piercing or -opening contact for an electrical connector, which contact is suitable for terminating both insulated stranded and insulated solid conductors.
Another object of the invention is to provide an electrical contact for an electrical connector in which the termination element includes conductor retention means for ensuring that a conductor remains seated in a desired position once the conductor has been inserted to that position.
A further object is to substitute smooth guide surfaces for at least part of the tapered cutting edges to reduce snagging and/or severing of the strands of an insulated stranded conductor.
Still another object is to form the smooth guide surfaces from the smooth flat uncut side of sheet metal.
An additional object is to provide side and bottom support for insulation-piercing detents so that the detents exhibit sufficient strength to penetrate or move the insulation to expose the underlying conductive strands while providing a smooth surface to guide the strands to a lower wiping surface.
Inasmuch as it is desirable in the production of contacts of an electrical connector to provide an electrical connector which is mechanically stable over a long period of time, and as a high tensile strength sheet metal has found to be suitable for contact use over an extended period, and as certain production problems concerning the bending of high tensile strength sheet metal material arise when resiliency over a short length is concerned, particularly with respect to double and reverse bends at the active portion of a contact to provide both male and female configurations, another object of the invention is to provide an insulation-opening contact structure having an active portion connected thereto by a stable configuration which avoids sharp reverse bends and which utilizes a material having sufficient resiliency to serve for a great number of engagement and disengagement operations over an extended period of time
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