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
  • 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
  • H01R12/50—Fixed connections
  • H01R12/59—Fixed connections for flexible printed circuits, flat or ribbon cables or like structures
  • H01R12/65—Fixed connections for flexible printed circuits, flat or ribbon cables or like structures characterised by the terminal
  • H01R12/67—Fixed connections for flexible printed circuits, flat or ribbon cables or like structures characterised by the terminal insulation penetrating terminals
• • 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

Definitions

• the invention relates to a contact system for stripping-free contacting of wire strands with at least one contact spit.
• a generic contact system is used in an actuator sensor module (DE 43 20 327 Cl) for contacting a two-wire flat cable.
• the flat cable is placed in a cable basket that can be moved in height. When it is moved, knife contacts penetrate the flat cable and contact its cable cores.
• contact systems are known in which the contact is made by means of contact screws, e.g. in EP 0 665 608 A2 and EP 0 603 134 AI.
• the contact systems are used here to create consumer branches.
• the screw connection is associated with a time-consuming assembly, which one would like to avoid as far as possible.
• the contact spike has a roof-shaped cutting area with two contact surfaces which correspond to two roof surfaces meeting in a ridge and which converge in a cutting edge corresponding to the ridge, which forms a tip together with one edge of the contact surfaces.
• the knife-like contact element ie the contact spit, allows penetration into the due to the shape described 2
• Cable strand without a sudden increase in force. Instead, there is a continuous penetration process, in the course of which the strands of the cable strands are not severed in places, but only shifted laterally.
• a suitable choice of the wedge angle between the two contact surfaces enables an optimum penetration force to be achieved. On the one hand, this must not be too high to ensure easy assembly, but on the other hand it must be large enough to achieve sufficient contact force.
• the contact resistance to the stranded wire can be reduced by increasing the contact area accordingly. Relatively large contact areas are required at higher current loads, for example at currents of up to 35 A with a cable cross-section of 4 mm 2 , in order to ensure a sufficiently low contact resistance and thereby keep the heating of the contact point low.
• a further advantageous embodiment exists if the contact skewer is provided with an operative connection to a spring element which effects the contact force acting on the contact skewer. This keeps the contact force almost constant, even if the insulation material of the cable strands creeps as a result of aging. 3
• the spring element is designed as a plate spring.
• the spring element is designed as an elastic clamp which connects two housing parts to one another apart from an intermediate space, the contact system being arranged in the interior between the housing parts.
• FIG. 1 shows a perspective view of a contact skewer according to the invention
• FIG 1 two side views of the contact skewer according to the invention shown in FIG 1,
• FIG. 4 shows a view of a spring-mounted contact system in a housing
• FIG. 5 shows a view of a housing with a contact system held together by an elastic clamp
• FIG. 6 shows a view of an arrangement with a special contact system for the electrical connection of two flat cables lying opposite one another in separate housing parts and
• FIG. 7 shows a schematic diagram of two housing parts connected by a buckle connection.
• the contact skewer 1 is characterized by an upper area with a rectangular cross section 2 and a tip adjoining this with a cutting area.
• the cutting area 3 is roof-shaped, that is to say it has two contact surfaces 4 which collide in a ridge like two roof surfaces. 4
• the two contact surfaces 4 form the cutting edge 5 corresponding to the ridge.
• This cutting edge 5 is bevelled in relation to the rectangular cross-sectional area in the upper region of the contact skewer 1.
• the edges 6 of the contact surfaces 4 corresponding to the contact edges of the roof surfaces can also run towards the upper region of the contact spike 1 in the same way as the cutting edge 4 bevelled to the cross-sectional surface 7. This results in a tip 9 formed in the lower region of the contact skewer 1 from the cutting edge 5 and in each case one side edge 8 of a contact surface 4.
• the contact spike 1 is first inserted into the insulating jacket and then between the individual wires of the stranded wire 10 by means of a contacting or penetrating force via its tip 9. This process is made possible by a corresponding design of the tip 9 with the subsequent cutting edge 5, the penetration of the contact spike 5 requiring less force the smaller the wedge angle ⁇ formed by the contact surfaces 4.
• the contact force and consequently also the contact resistance from the contact surfaces 4 to the stranded wire 10 can be influenced by varying the wedge angle ⁇ . In order to obtain a sufficiently small contact resistance even for larger current loads, for example for nominal currents of 35 A with a cable cross-sectional area of 4 mm 2 of the cable strands, the contact areas 4 must be increased accordingly.
• the suitable choice of the wedge angle ⁇ ensures an optimal penetration force. This must not be too high to ensure easy assembly, but on the other hand it must be large enough to provide sufficient contact force.
• FIG. 4 shows a double skewer 12 which is resiliently mounted in an upper housing part 11 and which serves for contacting and electrical connection of two flat cables, not shown here, mounted in a lower housing part 13.
• the double skewer 12 is mounted here under spring loading of disc springs 14.
• the two housing parts 15 there is a flat cable 18 and a contact system of the form described above with a contact spike 19, which here contacts one of the line wires as an example.
• the layer 16 made of the resilient material enables the contact force to be maintained despite the aging process of the flat cable 18 already mentioned.
• FIG. 6 An arrangement according to FIG. 6 is particularly suitable for contacting and electrical connection of the line wires of two flat cables, in which the contact spikes 20 are each designed with a tip in the shape already described. Opposite the tips, the flat cables can be inserted in two housing parts 21 that are movable relative to one another.
• the power transmission to the two housing parts 21 for contacting the contact spikes 20 can e.g. by means of a buckle connection, as is shown in principle in FIG.

Landscapes

• Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)
• Multi-Conductor Connections (AREA)
• Processing Of Terminals (AREA)
• Contacts (AREA)
• Manufacture Of Switches (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=7862968

Family Applications (1)

Country Status (4)

Families Citing this family (7)

Family Cites Families (11)

• 1998
  • 1998-03-30 DE DE19814182A patent/DE19814182C2/de not_active Expired - Fee Related
• 1999
  • 1999-03-18 DE DE59901934T patent/DE59901934D1/de not_active Expired - Fee Related
  • 1999-03-18 AT AT99917792T patent/ATE220249T1/de not_active IP Right Cessation
  • 1999-03-18 WO PCT/DE1999/000770 patent/WO1999050934A1/fr active IP Right Grant
  • 1999-03-18 EP EP99917792A patent/EP1068654B1/fr not_active Expired - Lifetime

Non-Patent Citations (1)

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