Electrical connectors – With insulation other than conductor sheath – Metallic connector or contact secured to insulation
Patent
1992-03-17
1993-10-12
Desmond, Eugene F.
Electrical connectors
With insulation other than conductor sheath
Metallic connector or contact secured to insulation
439595, H01R 13514
Patent
active
052520951
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
Such electrical connectors are widely known, for example from German references DE-C-35 37 722 or DE-U-86 08 199. The connector design of the present invention provides that the contact elements, which are bent from sheet metal into a tubular or groove shape, in partial zones, bend upwards from a common base zone. The known connectors of this type are therefore all designed such that the open side of the crimping zone and the locking edge mentioned are constructed on the same side of the wall of the contact element, offset somewhat only in the axial direction.
However, when crimping on a stranded conductor, the case can arise that the ends of the strands project beyond the crimping zone and that the individual wires of the strands are thus spread out to a great extent. The problem then arises that, as a result of the locking strip, which can be part of the top housing, being pushed in, the ends of the strands are looped in the transverse direction over the housing slot into the adjacent contact chamber and then cause a short-circuit with the adjacent contact.
SUMMARY OF THE INVENTION
The object of the invention is to develop an electrical connector of the type mentioned initially such that reliable insulation is ensured between adjacent contact elements and cable cores by means of a locking strip and a top housing, despite an unchanged plug attachment of the contact elements and with locking which is likewise unchanged.
This object is achieved according to the invention in that the recesses and the locking edges, on the one hand, and the open sides of the crimping zones, on the other hand, are provided in each case on mutually opposite sides of the wall of the contact elements, and in that the crimping sections of the inserted contact elements are each located opposite a closed housing wall.
In the connector design according to the invention, the crimping zones thus face away from the locking zones of the contact elements so that the crimping zone thus has a more or less closed sheet-metal wall at the side of the locking edge and of the housing slot, and, on the other hand, faces a closed housing wall with its open side. Thus, even if a stranded conductor is spread at its free end and the free ends of the individual conductors project outwards in a uncontrolled manner, they cannot cause a short-circuit since they are opposite a closed wall region of the insulating housing and, in any case, do not come into contact with the locking strip, which is pushed in at right angles.
In general terms the electrical connector of the present invention for a plurality of stranded conductors has the following features:
a row of adjacent contact chambers is constructed in a housing;
one contact element can be inserted in a latching manner into each of the contact chambers;
each contact element is constructed, at least in partial zones, in a tubular shape and has a crimping zone for the connection of a standard conductor, and a locking edge which is formed by a recess and points in the opposite direction to the insertion direction and
the housing has a slot which runs at right angles to the insertion direction of the contact elements and is located above the recesses of the contact elements and into which a locking strip, engaging behind the locking edges of the contact elements can be pushed,
the recesses and the locking edges, on the one hand, and the open sides of the crimping zones, on the other hand, are provided in each case on mutually opposite sides of the wall of the contact elements, and
the crimping zones of the inserted contact elements are each located opposite a closed housing wall.
Particular configurations and developments of the present invention are as follows. The section cut from the material of the contact element to form the recess is bent into the interior of the contact element as a covering flap. The locking strip is part of a top housing which can be pushed onto the housing from the side. The slot opens into the interior of the housing and the locking strip can be i
REFERENCES:
patent: 4540235 (1985-09-01), Lolic
patent: 4714437 (1987-12-01), Dyki
patent: 4867712 (1989-09-01), Kato
patent: 4946399 (1990-08-01), Kawashima
Breitschaft Josef
Wohlfart Artur
Desmond Eugene F.
Siemens Aktiengesellschaft
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