Electrical connectors – Contact comprising cutter – Insulation cutter
Patent
1986-10-31
1988-02-09
McGlynn, Joseph H.
Electrical connectors
Contact comprising cutter
Insulation cutter
439417, H01R 424
Patent
active
047239182
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the invention
The present invention relates to a device for connecting at least two conducting wires each surrounded by an insulating sheath comprising a housing in which is formed a passage for inserting an end portion of the sheathed wires, means for receiving said end portions in the housing, means adaped for being inserted into the housing transversally to the sheaths and cooperating with the means for receiving the sheaths for stripping the wires longitudinally.
The device of the invention serves for connecting wires with several strands or, and preferably, with a single strand.
2. Description of the Prior Art
Such connection devices are already known.
French patent application No. 8 106 718 describes one in which a catch having a reception opening and a conducting clip having a cutting edge cooperate for bending the end portion of the wires extending beyond the opening of the catch, the clip by its cutting edge stripping this end portion after having bent it. In this device, the stripped wires are clamped or locked between the clip and the catch.
U.S. Pat. No. 4,053,197 describes a connection device in which the end portion of the wires is driven along a cutting edge of a catch, as far as the free end of this portion, the wires being formed on the side of their length adjacent this end portion, before this latter is clamped or locked. In this device, once stripped and clamped the wires are no longer bent.
All the devices of the prior art and especially those mentioned above have drawbacks. Either the insulator of the sheath, during stripping is removed, which causes waste or else the mechanical strength and particularly the tensile strength is not excellent. In all cases, the electric connection is provided by surfaces whose contact may not be sufficient.
The present invention overcomes these drawbacks.
SUMMARY OF THE INVENTION
For this, the present invention relates to a connection device of the above-mentioned type, characterized by the fact that the housing has an abutment surface parallel to the direction of insertion of the wires for their end portion, the reception means have a conducting stripping edge and said means inserted into the housing comprise at least two slits adapted for gripping the sheaths of the wires and drawing them inwardly and towards the bottom of the housing and against the stripping edge.
In the connection device of the invention, the abutment surface of the housing, the bottom of the slits of the wire drawing means and the reception means with their stripping edge, form a zigzag obstacle by which the wires are bent twice, substantially at 90.degree. in opposite directions. Thus, the mechanical strength or connection is perfectly ensured. Furthermore, the stripping edge only causes lateral creep of the insulator of the sheath, without causing waste. The electrical connection, along this sharp stripping edge is also excellent.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be better understood from reading the following description of a preferred embodiment of the device of the invention, made with reference to the accompanying drawings in which:
FIG. 1 shows a schematical view in perspective of the drawer of the device of the invention;
FIG. 2 shows a schematical view in a different perspective of the housing of the device of the invention;
FIG. 3 shows a front view, in section, of the housing of FIG. 2, before insertion of the wires;
FIG. 4 shows a side view in section along line IV--IV' of FIG. 3;
FIG. 5 shows a lateral sectional view, similar to FIG. 4, of the device after insertion of the wires;
FIG. 6 shows a partial lateral view of the device, in section, after the wires have been stripped, and
FIG. 7 shows a bottom view of one of the stripped wires.
DESCRIPTION OF THE PREFERRED EMBODIMENT
The device shown (FIG. 2) comprises a substantially parallelepipedic housing 1 comprising on one of its front faces a chimney 2 for leading in wires, of substantially rectangular section. The housing is open on its upper face.
REFERENCES:
patent: 4550970 (1985-11-01), Ogino
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