Electrical connectors – Contact comprising cutter – Insulation cutter
Patent
1995-04-20
1997-08-05
Pirlot, David L.
Electrical connectors
Contact comprising cutter
Insulation cutter
439395, H01R 424
Patent
active
056536089
DESCRIPTION:
BRIEF SUMMARY
The present invention is generally concerned with connectors including in an insulative body at least one insulation displacement contact, i.e. at least one contact which, for connecting an insulated or uninsulated electrical conductor, includes two arms delimiting between them a slot into which the electrical conductor is forced.
These connectors are used in receptacles, especially low-current receptacles, electrical appliances and telephone distribution frame and sub-distribution frame components such as cable terminations or cross-connect terminal strips.
In practice, these connectors include a plurality of parallel insulation displacement contacts.
One problem with manufacturing them is therefore to minimize their overall size and to make a reliable connection.
Document EP-A-0 014 081 describes a flat insulation displacement contact including three limbs defining two slots for the same conductor. To connect it the conductor is inserted slantwise between the two side limbs and the middle limb and forced along the two slots. The connection is reliable but requires a high insertion force to push the conductor along the two slots. The contact is relatively bulky.
Document EP-A-0 075 150 describes a multiple contact including a plurality of parallel contact branches fastened together and each connecting one conductor. Each contact branch includes a slot in which the connected conductor assumes an oblique position relative to the contact branch, for example a position at 45.degree.. In each branch the two edges facing the slot are slightly bent on either side of the branch and separate the conductors in the slots which are connected together in parallel. On cross-connect terminal strips the pitch of the multiple branched contacts is relatively large and makes the terminal strip relatively bulky.
An object of the present invention is to reduce the overall size of the contacts in the insulative body of the connector and to increase the reliability of the connection between the conductors and the contacts.
The present invention consists in a connector including an insulative body and at least one flat insulation displacement contact mounted in a groove in said body, wherein each contact has an insulation piercing slot for connecting a conductor and two substantially coplanar arms on opposite sides of said slot, characterized in that it further includes means on opposite sides of said slot for shaping said conductor associated with each contact for connecting said conductor in the slot and pressing said conductor against opposite sides of the contact, on a first side in the case of one of the arms and on the opposite side in the case of the other arm.
This connector advantageously has at least one of the following additional features: conductor include on said contact two flats for engaging the conductor in the slot substantially symmetrically inclined on opposite sides of said arms and extending the respective arm at the end of said slot to receive and locate the conductor between them along a line substantially perpendicular to the direction of said slot. mobile between two flanks of said slot from a position of engagement of the conductor between said flats to a position of connection of the conductor in said slot, the two facing flanks holding the conductor against said contact during placing of the latter in said connection position. said groove in which said contact is fixed and which is long, open, delimited between two facing flanks which are substantially S-shape, at least locally and in a longitudinal direction of the groove, and each adapted to hold a first side of a first arm against a first of said flanks in a first end portion of said groove and the opposite or second side of the second arm against the second flank in the second end portion of said groove and to guide the conductor received in the longitudinal direction of the groove against the second side of the first arm and the first side of the second arm, before its engagement in said slot. is also S-shape and each has two substantially paral
REFERENCES:
patent: 4822298 (1989-04-01), Gerke et al.
patent: 4891018 (1990-01-01), Afflerbaugh et al.
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