Electrical connectors – Coupling part including flexing insulation – Sealing
Patent
1985-10-09
1987-06-23
Weidenfeld, Gil
Electrical connectors
Coupling part including flexing insulation
Sealing
439736, 439869, H01R 1100
Patent
active
046748164
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a connection arrangement for an electrical conductor to connect the conductor to electrical apparatus, and more particularly to such a connection arrangement which is water-proof, pressure-resistant, and suitable to connect, for example, electrical cabling or wiring to electronic components and sensors used in automotive applications in locations where the terminal portions of the cables and wires are exposed to moisture, shock, vibration, and varying pressures.
BACKGROUND
It is known to dispose a shrink tube over end sections, surrounding a cable conductor extending from a plastic bushing or plug; the shrink tube extends up to the bare end, of the conductors. The shrink tube covers the transition between the bare ends of the conductor and the conductor itself, which is surrounded with an insulating sheath and forms one cable element or wire of the line. A plastic bushing or plur, in turn, is extruded around the cable ends and the end section of a plastic jacket surrounding the cables, and is bonded with this jacket. The arrangement has a disadvantage; the ends of the conductors are not sufficiently moisture-proof. In the case of stranded conductors, the moisture can seep between the individual strands. Although this disadvantage can be eliminated by tinning the strands, still a seal relative to the shrink tube is attained only if the tinning produces good roundness of the conductor so that the shrink tube rests against it on all sides. However, embodying the known line connection by round tinning of the strands and sealing off the shrink tube is relatively labor- and cost-intensive.
THE INVENTION
It is an object to provide a connection arrangement, and electrical cable connectors which are immune to external ambient conditions detrimental to good electrical contacts and connections, and which can make, effectively, sealed electrical connections in the interior of a plastic housing, for example to a sensor element.
Briefly, the electrical wires have insulating material placed thereabout, for example sleeves, insulating enamel or the like.
The terminal end parts of the wires are bare, for connection to the electrical apparatus. An entrance bushing or plug is used to connect the wires into a housing. To seal the wires into the plug, the plug, or plastic bushing, as well as the adhering insulating layers on the wires, are made of materials which join together, for example by melting together during injection molding of the plug or bushing around the wires and their insulating layers, or by chemical interaction of the material of the insulating layers and the material of the plug or bushing. The result will be a bond between the cable, or its outer sheath, which is not only mechanically tight, but which forms what may be termed an internally thermally or chemically welded interconnection or juncture between the insulating material of the wires and the material of the plug or bushing, throughout the extent of engagement of the plug or bushing about the wire.
In accordance with a feature of the invention, and when the cables are stranded cables, solid wire ends are spliced to the stranded cables, the splice surrounded by the insulating layer and the splice, together with the insulating layer, encapsulated with the material of the plug or bushing which joins with the layer of insulating material. This prevents possible seepage of moisture between strands of the stranded wires or cables while securely retaining the outer jacket or sheath of the connecting line, and all the wires or cables within the joined layer of insulating material and the material of the bushing.
The arrangement according to the invention has the advantage that the intrusion of moisture between the electric conductor and the plastic bushing or, between the plastic bushing and the line jacket surrounding both it and the line ends, and between the line jacket and the housing surrounding is prevented. A plastic bushing can be insertion molded directly around the line. The result is a connecting line which is
REFERENCES:
patent: 4032214 (1977-06-01), McNerney
patent: 4181394 (1980-01-01), Dodge
Frenznick Anton
Just Bernhard
Krauss Eugen
Pfander Werner
Trankle Ewald
Austin Paula A.
Robert & Bosch GmbH
Weidenfeld Gil
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