Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
  • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
  • H01R4/24—Connections using contact members penetrating or cutting insulation or cable strands
  • H01R4/2416—Connections using contact members penetrating or cutting insulation or cable strands the contact members having insulation-cutting edges, e.g. of tuning fork type
  • H01R4/2445—Connections using contact members penetrating or cutting insulation or cable strands the contact members having insulation-cutting edges, e.g. of tuning fork type the contact members having additional means acting on the insulation or the wire, e.g. additional insulation penetrating means, strain relief means or wire cutting knives
  • H01R4/2458—Connections using contact members penetrating or cutting insulation or cable strands the contact members having insulation-cutting edges, e.g. of tuning fork type the contact members having additional means acting on the insulation or the wire, e.g. additional insulation penetrating means, strain relief means or wire cutting knives the contact members being in a slotted tubular configuration, e.g. slotted tube-end
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
  • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
  • H01R12/70—Coupling devices
  • H01R12/77—Coupling devices for flexible printed circuits, flat or ribbon cables or like structures

Definitions

• the present invention relates to an electrical contact of the insulation displacement type, that is to say capable of being connected to an electrical conductor surrounded by an insulator, without prior stripping.
• the invention also relates to a method of manufacturing this contact.
• the invention also relates to connectors comprising one or preferably a plurality of these contacts and allowing the connection of all of the connector contacts to one or more conductors or sets of insulated conductors, in particular in the form of ribbon cables, again called “ribbon cables”.
• the invention relates more particularly to an electrical contact intended to be connected to an electrical cable which is formed of at least one conductor surrounded by an insulator, without prior removal of this insulator, which cohtact has at its front end two substantially semi-cylindrical branches surrounding a central recess of substantially cylindrical shape and separated by two diametrically opposite longitudinal slots intended to receive the conductor, these branches ending in the front by points which are capable of penetrating the insulating and converging two by two backwards to one or the other of the slots, the branches being connected to one another at the rear of the two slots.
• the contact according to the invention is essentially characterized in that it only has two points offset circumferentially by 90 ° relative to the slots, whereby the conductor is guided towards the two slots during the penetration of the tips into the insulation.
• each branch is provided with an external chamfer tending to oppose any deformation towards the outside and therefore any enlargement of the slots, this chamfer being able to be d 'a relatively small size because the central recess, by receiving the cut insulating material, avoids a stuffing effect and therefore a tendency to the separation of the two branches.
• the height of the slots is such that the end of the slot opposite the points is located below the bottom of said substantially cylindrical recess. In other words, the height of the slots is less than the depth of said recess.
• the contact tail can be made anyway to form itself, for example, a male contact or plug-in female.
• the invention also relates to a method of manufacturing this contact, characterized in that a rigid metal rod section is used (on the scale of the contact which can be very small), which is preferably provided the turning of the end, which is preferably externally chamfered at the end of this rod, which is carried out axial drilling of the central recess to a diameter preferably slightly less than the diameter of the chamfer, which is machined the two slits and that we form the points.
• the machining of the slots is carried out using a milling cutter while the shaping of the points, according to a plane perpendicular to the cutting plane of the slots, is carried out using a strawberry in shape, preferably with a triangular groove.
• the subject of the invention is also a connector comprising one or preferably a plurality of contacts, characterized in that it comprises, on a connector cradle, one or more contacts according to the invention with the contact branches emerging from said cradle, the contact bearing on the cradle to remain fixed relative thereto during penetration into the insulating material.
• the cradle which can be associated with a usual connector housing containing the non-protruding contact parts, can also be associated with a connector cover capable of receiving the wire or ribbon cable in order to apply it against the cradle and produce the penetration of the branches of the individual contacts into the insulating material.
• Figure 1 shows an elevational view of the end of a connector according to the invention.
• Figure 2 shows a perspective view of this end.
• Figures 3 to 7 schematically represent the different stages of the method of manufacturing a contact according to the invention.
• FIG. 8 represents a schematic perspective view of part of a connector comprising the contacts according to the invention.
• FIG. 9 represents a schematic view of part of the connector when the contacts are inserted into a ribbon cable.
• FIG. 10 represents a schematic view of the conductor clamped in the slots of a contact. reference is made to FIGS. 1 and 2.
• the end 18. of the contact seen in these figures has, with respect to the central cylindrical part 1 of the contact, a reduced diameter so as to form a radial shoulder 2.
• This end has two substantially semi-cylindrical branches 3 , 4 which surround a concentric cylindrical recess 5.
• Each of the branches 3, 4 has a penetration point 6,7 the upper part of which is arranged practically in the geometric cylinder which delimits the internal cylindrical recess 5.
• the ends 6, 7 have outwardly a changeable portion 8, 9.
• the two sides 10, 11 located opposite one another converge back towards a longitudinal slot 14 whose bottom 15 is located above the bottom 16 of the central cylindrical recess 5.
• the two slots 14 are produced at the same time using a saw mill 22 having the desired thickness.
• the points 6 and 7 and the flaps 10 and 11 are produced using a milling cutter 23 having an internal groove with V section, the axis of rotation of the cutter 23 being perpendicular to the axis of rotation of the saw 22 so that the two vertices 6,7 are angularly offset by 90 ° relative to the slots 14.
• the process thus defined can be the subject of different variants, some steps can be reversed and chamfering can be omitted.
• it is not absolutely necessary to produce a shoulder 2 the positioning of the contact in the connector being able to be ensured in another way.
• the machining of the rest of the contact including its tail.
• the rest of the contact can be of any known or other form.
• the tail of the contact can be made in the form of a male or female plug.
• FIG. 8 schematically shows a connector comprising contacts according to the invention.
• This connector comprises, in a manner known per se, a cradle 24 provided with a plurality of holes 25 distributed over two parallel rows, offset by a half-step relative to one another.
• the cradle 24 is integral with a connector housing 26 provided with fixing means 27 for securing the connector cover 28.
• the different individual contacts are inserted into the different holes 25 of the cradle 24 so that their branches 3, 4 remain visible.
• Known type means flat, bossed or similar
• maintain the contacts so that their slots 14 remain perpendicular to the rows of holes 25.
• a ribbon cable 30, provided with different parallel electrical conductors 31, is disposed under the cover 28 in the configuration shown in the drawing.
• Each lateral edge of the cable is precentered by a shoulder 32 of the cover 28 and centered by parallel ribs that the cover 28 includes and which engage in parallel grooves 36 of the ribbon cable 30.
• FIG. 10 represents a schematic cross-sectional view of a contact at the level of the deformed conductor 31, it can be seen that the insulating material 33, surrounding the conductor 31, could have largely found its place in the inner recess 5.
• the conductor 31 itself is deformed by being pinched in a way only when it passes through the two slots 14 in the zones 34.
• each contact instead of being cylindrical up to the shoulder 2, could for example be frustoconical or cylindrical over most of its height by being connected to the shoulder 2 by an arched profile leave. Moreover, he it would be possible to give the slots 14 of each contact unequal widths.

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• Manufacturing Of Electrical Connectors (AREA)
• Coupling Device And Connection With Printed Circuit (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=9254595

Family Applications (1)

Country Status (7)

Families Citing this family (6)

Citations (7)

Family Cites Families (1)

• 1981
  • 1981-01-28 FR FR8101588A patent/FR2498822A1/fr active Granted
• 1982
  • 1982-01-25 EP EP82400133A patent/EP0057633A1/fr not_active Withdrawn
  • 1982-01-25 JP JP57500368A patent/JPS57502235A/ja active Pending
  • 1982-01-25 WO PCT/FR1982/000015 patent/WO1982002627A1/en unknown
  • 1982-01-27 DK DK36282A patent/DK36282A/da not_active Application Discontinuation
  • 1982-01-27 CA CA000395042A patent/CA1184982A/fr not_active Expired
  • 1982-01-27 ES ES1982271040U patent/ES271040Y/es not_active Expired

Patent Citations (7)

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