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
  • H01R4/242—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 being plates having a single slot
  • H01R4/2425—Flat plates, e.g. multi-layered flat plates
  • H01R4/2429—Flat plates, e.g. multi-layered flat plates mounted in an insulating base
  • H01R4/2433—Flat plates, e.g. multi-layered flat plates mounted in an insulating base one part of the base being movable to push the cable into the slot
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
  • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
  • H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding  
  • H01R13/658—High frequency shielding arrangements, e.g. against EMI [Electro-Magnetic Interference] or EMP [Electro-Magnetic Pulse]
  • H01R13/6591—Specific features or arrangements of connection of shield to conductive members
  • H01R13/65912—Specific features or arrangements of connection of shield to conductive members for shielded multiconductor cable
  • H01R13/65915—Twisted pair of conductors surrounded by shield
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
  • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
  • H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding  
  • H01R13/658—High frequency shielding arrangements, e.g. against EMI [Electro-Magnetic Interference] or EMP [Electro-Magnetic Pulse]
  • H01R13/6591—Specific features or arrangements of connection of shield to conductive members
  • H01R13/6592—Specific features or arrangements of connection of shield to conductive members the conductive member being a shielded cable
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
  • H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
  • H01R9/03—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections
  • H01R9/05—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections for coaxial cables
  • H01R9/0518—Connection to outer conductor by crimping or by crimping ferrule
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
  • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
  • H01R13/646—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00 specially adapted for high-frequency, e.g. structures providing an impedance match or phase match
  • H01R13/6461—Means for preventing cross-talk
  • H01R13/6463—Means for preventing cross-talk using twisted pairs of wires

Definitions

• the invention relates to a connection element for the insulated individual conductors of an RF cable twisted in pairs, which connection element has an even number of contact slots with a cutting or piercing device arranged in the direction of the conductor end due to the insulation of the inserted individual conductor.
• the invention further relates to a method for fastening the individual conductors of an HF cable in such a connection element and to the use of the connection element.
• connection elements for RF cables on the market, for example with 2, 4, 6, 8, 10, 12, 14 or more poles, as the contacts are also called. With these connection elements, incorrect connections are avoided by marking the contact slots with the identification color of the individual conductor to be inserted or its insulation. Numbers, letters, symbols or combinations thereof can also be used for identification.
• connection elements are standardized and are used, for example, in an HF connector system which comprises a socket insert and a corresponding plug as connector parts with a grounded shield from HF cable to HF cable.
• Connector systems are used in particular for electrical connections to communication main and peripheral devices, for example ISDN, telephone, terminal and modem, as well as PC, host or data network systems.
• RF cables comprise one to four pairs of conductors, in particular four pairs, according to the standards applicable today. However, it is definitely in the perspectives of today and tomorrow Developments to combine more pairs of conductors in one RF cable.
• the individual conductors suitably insulated copper wires or strands with a diameter of up to about 0.8 mm, are twisted together in pairs.
• the individual conductors may run in parallel over a maximum length of 12 mm, otherwise signal errors cannot be avoided in the range above approximately 300 MHz.
• the conductor pairs can be embedded in an RF cable as twisted.
• a twisted pair of conductors can also be covered with a film that provides mechanical support, for example with a longitudinally running or wrapped polyester film.
• a covering with a metal foil is considered essential in the current state of the art.
• the wrapping with a metal foil, in particular with an aluminum foil can in turn be carried out longitudinally or by wrapping, the metal foil also being able to be designed as a composite foil with an inside plastic carrier.
• the term metal foil here also encompasses suitably designed fabrics, braids, knitted fabrics or spiral windings of metal threads which fulfill the same function.
• the individual conductor pairs are surrounded by a peripheral shield and an outer insulation jacket.
• the peripheral shield of the HF cable ura comprises at least one braid, fabric or knitted fabric made of metal wires, in particular of copper, to which a metal foil, in particular of aluminum, can rest on the inside.
• HF cables of this type have a defined minimum permissible bending radius, which in the case of a conventional manufacturer is for example four to five times the outer diameter of the cable. If these bending radii are undershot, disruptions or even business interruptions can be expected.
• An advantageous solution to this problem is shown in EP, AI 0709929, to which express reference is made.
• any flexible mass is removed in this area.
• the twisted pairs of conductors are now exposed, for example over a length of 5 to 8 cm.
• any covering of the conductor pairs is also removed and the free individual conductors in this area are aligned approximately in parallel.
• the individual conductors are sorted, placed on the assigned contact slot and pushed into them with a special tool, the protruding individual conductor being usually cut off at the same time. This sounds very simple, but it is extremely difficult and tedious to carry out in practice.
• the individual conductors must be sorted, aligned and pushed into the contact slot in a very narrow assembly space. It is not uncommon for the bulky special tool to damage the insulation of the individual conductors. This can lead to short circuits, which results in a total power failure.
• the invention has for its object to provide a connecting element for RF cables of the type mentioned and a method for attaching its individual conductors, which facilitate assembly and significantly reduce the amount of work.
• the contact slots of the connecting element have a latching arranged in a first part of the slot length, the conductor pair zone, for the associated unseparated conductor pairs and in a second part of the slot length, the single conductor zone - have genes for the individual conductors.
• the contact slots of the connection element are expediently parallel, they are delimited laterally by two outer and inner webs. Since unseparated pairs of conductors with twisted insulated individual conductors, enveloped or not, take up more space for locking than individual conductors, in this pair zone, every second inner web is preferably designed to be removable or omitted. This part of the inner webs can, for example, be broken away in one piece or in several sections. This provides enough space for the twisted pair of conductors. The individual conductors are locked in the narrow contact slots formed by all inner webs.
• the first part with the conductor pair zone for the non-separated conductor pairs is expediently shorter than the second part with the contact slots for the individual conductors.
• the conductor pair zone preferably extends over 20 to 50% of the total slot length.
• the latches themselves can be designed in a manner known per se, for example as retaining lugs or as a spring clip.
• the object is achieved according to the invention in that after the twisted conductor pairs and the terminal individual conductors have been exposed, the non-separated conductor pairs in the conductor pair zone, the individual conductors are locked in a contact slot, and then, with the aid of a sealing cap, all the locked individual conductors are locked in their contact slot as well as all latched conductor pairs are pushed into their conductor pair zone and held down there.
• Special and further developing embodiments of the method are the subject of dependent patent claims.
• the twisted pairs of conductors are therefore initially locked in a pair of conductor pairs with or without a sheathing.
• Cell conductors themselves only need to be latched after the unseparated double conductors have been latched.
• the larger double conductors can be easily pushed into the relevant contact double slot by hand and thus locked in place.
• the individual conductors are then roughly positioned and can be finally positioned with little effort and also locked by hand.
• the order can also be reversed, first the individual conductors, then the conductor pairs are locked.
• the locking of sheathed conductor pairs together with their sheathing in a conductor pair zone has proven to be particularly advantageous.
• the cut back sheathing in the connector free space cannot trigger undesired side effects in an uncontrolled manner, but remains fixed in an orderly manner and envelops the unseparated double conductor as far as possible and stably. This also improves the shielding in the case of a metallic covering, which is expressed in a higher signal quality.
• connection element The protruding individual conductors mounted in the connection element can easily be cut off in one work step; no bulky, complicated tools requiring a great deal of effort are required to insert and simultaneously cut off a single conductor.
• connection elements according to the present invention and the method for fastening the individual conductors of an RF cable results in connection with the already mentioned EP, AI 0709929.
• the system can be adjusted at an adjustable angle to which system a grounded shield from HF cable to HF cable runs continuously over a large area and with at least one flexible area. Thanks to the continuously large, flexible shielding in the area outside the cable sheath, i.e. in the area of the exposed conductor pairs or individual conductors, the cable can be adjusted at any angle by bending, as mentioned, without the risk of kinking or too tight a bending radius for the RF cable exists. This runs practically straight in every position.
• connection element according to the invention has a particularly advantageous effect in an HF connector system if the contact slots or contact double slots run in the cable direction. Then the twisted cables can be arranged and snapped into place in a time-saving and easy way.
• All protruding individual conductors can be cut off in one operation and with one cut after positioning, which is usually simpler and cheaper than a cutting device integrated in the sealing cap.
• - Fig. 2 is a cut side view of a
• FIG. 3 shows a variant of FIG. 1 with a closure cap
• FIG. 4 shows a variant of FIG. 2 with a twisted, uncovered pair of conductors
• FIG. 6 shows a detail A according to FIG. 5, and FIG. 7 shows the use of a connection element in an HF connector system.
• a connecting element 10 shown in FIGS. 1 and 2 for an HF cable 12 (FIG. 7) consists of a plastic injection molded part "The parallel two outer webs 14 and seven inner webs 16 form a total of eight longitudinal, continuous contact slots 18 for individual conductors 20 with one Insulation jacket 22.
• the first, third, fifth and seventh inner web 16 are removed or not formed in a first region D above a bearing surface 48 (FIG. 2).
• a pair of conductors 26 with twisted insulated individual conductors 20 can be received and locked in the resulting conductor pair zone 24.
• the latching takes place together with the covering 28.
• retaining lugs 30 are formed in the region of the slot opening.
• a pair of retaining lugs 30 is formed in the conductor pair zone 24, which latches the sheathed conductor pair 26.
• an upper retaining lug 32 and a lower retaining lug 34 are formed per contact slot 18.
• the inner web 16, which is formed only in the single-conductor zone, has no retaining lugs.
• An isolated individual conductor 20 is latched between the upper and the lower retaining lug 32, 34.
• All holding lugs 30, 32, 34 have a sliding surface 36 against the slot interior 18, 24 and a latching surface 38 against the outside.
• the latches serve to temporarily hold the inserted conductor pairs 26 and individual conductors 20.
• the latched, insulated individual conductors 20 of a pair of conductors 26 each rest on an insulation displacement connection 40, 42, which for design reasons are offset with respect to the longitudinal direction of the individual conductors 20.
• the viewing direction is different on the left and on the right half. On the left side, one looks in the direction of the conductor pair 26 towards the individual conductors, on the right side in the opposite direction.
• closure cap 82 with push-in lamellae 84 for simultaneous pushing-in of all latched individual conductors 20 and all latched conductor pairs 26 is shown in FIG. 3 above. In the end or hold-down position, the closure cap 82 engages in hold-down lugs 86.
• FIG. 5 shows a cross section through a pair of conductors 26 with a sheath 28.
• the individual conductors 20 are designed as strands, not, as is usually the case, as wires.
• the closure flap can additionally include an electrically non-conductive cutting device, e.g. a cutting knife for the simultaneous cutting of the excess lengths of the inserted individual conductors.
• an electrically non-conductive cutting device e.g. a cutting knife for the simultaneous cutting of the excess lengths of the inserted individual conductors.
• the casing 28 is designed to overlap so that it can be removed without problems. The consequence of this is that when it is partially removed in the direction of the conductor end, it dissolves further than intended and the protective effect can no longer or not fully develop. According to an essential advantage of the invention, the sheath 28 can be fixed simultaneously when the pair of conductors 26 is locked.
• a composite film made of a preferably internal polyester film 52 and an aluminum film 54 form an ideal material.
• FIG. 7 shows a socket insert equipped with a connecting element 10 according to the invention with a shield 58 in accordance with the already mentioned EP, AI 0709929.
• EP, AI 0709929. load-bearing Plastic parts of the socket insert are omitted, they are of the type familiar to the person skilled in the art.
• a shield connection 58 is bent back and the interior of a shielding housing 60 is thereby completely exposed.
• An RF cable 12 inserted into the shield connection 58 and already fastened with a crimping plate 62 is indicated.
• a flexibly designed sheet 64 is only bent along its first predetermined bending area 66, while a second predetermined bending area 68 remains unchanged.
• the first predetermined bending area 66 of the flexibly designed sheet 64 is bent over such that it is integrated into the contour of the shielding housing 60.
• the shielding housing 60 is now ready for mounting a housing cover which holds down the flexibly designed sheet 64.
• the flexibly designed sheet 64 is bent approximately at a right angle.
• the HF cable 12 runs at an angle to the direction of insertion.
• the second predetermined bending area 68 can also remain stretched, the shield connection 58 being in the position S shown.
• the bending angle in the second predetermined bending area 68 can vary within wide limits, in particular from an HF cable 12 (position R) running approximately at right angles to the plug-in direction to approximately 180 °, the cable connection to the rear (position S).
• the shield connection 58 on the HF cable 12 can also be unbent beyond the right angle from position R and / or the extended position S can be exceeded. In no position is the RF cable 12 itself significantly bent, the exposed pairs of conductors 26 with their twisted individual conductors 20 (FIG. 5) easily adapt to any change in angle in the predetermined bending areas 66, 68.
• the HF cable 12 comprises four pairs of conductors 26. Outside the shield connection 58, the HF cable 12 is protected with an outer insulation jacket 70. In the area of the shield connection 58, the insulation jacket 70 is completely removed, and the metal braid 72, which is exposed over the entire circumference, is clamped in a contact-locking manner, at most after being flipped over. When the metal braid 72 is folded over, an underlying aluminum foil 74 is exposed. This foil complements the metallic shield and also serves as a moisture barrier in the HF cable 12.
• the connecting element 10 is mounted in the interior of the shielding housing 12. For reasons of clarity, it is rotated by 90 °, the contact slots preferably run in the direction of the HF cable 12.
• the connection element 10 has, for more precisely, each pair of conductors 26 for their individual conductors 20 with insulation jacket 22 (FIG. 2), which are not visible here. an insulation displacement connection 42, in which the insulation of the inserted single conductor 20 is cut and the metal contact is produced in the simplest manner when the metal contact is pressed on. Insulation displacement connections of this type are commercially available and are described in more detail, for example, in EP, AI 0088162.
• connection element 10 Below the connection element 10 is mounted a printed circuit board 78 which extends into the housing 76 and from which, for the sake of simplicity, electrical conductor wires lead to the contact element 80, from where the electrical signals are transmitted in a manner known per se to the sliding contacts of a plug.
• two contact elements 80 can also be seen, which, when the plug is attached, connect the shielding of the socket insert to that of the plug in an electrically conductive manner.

Landscapes

• Details Of Connecting Devices For Male And Female Coupling (AREA)
• Communication Cables (AREA)
• Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)
• Cable Accessories (AREA)
• Microwave Amplifiers (AREA)
• Non-Reversible Transmitting Devices (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

Family

ID=4205877

Family Applications (1)

Country Status (7)

Cited By (1)

Citations (3)

• 1997
  • 1997-05-27 CH CH01245/97A patent/CH692435A5/de not_active IP Right Cessation
• 1998
  • 1998-05-16 TW TW087107606A patent/TW410492B/zh active
  • 1998-05-20 DE DE59805520T patent/DE59805520D1/de not_active Expired - Fee Related
  • 1998-05-20 AU AU72033/98A patent/AU7203398A/en not_active Abandoned
  • 1998-05-20 WO PCT/CH1998/000209 patent/WO1998054791A1/de active IP Right Grant
  • 1998-05-20 EP EP98919024A patent/EP0985250B1/de not_active Expired - Lifetime
  • 1998-05-20 AT AT98919024T patent/ATE224106T1/de not_active IP Right Cessation

Patent Citations (3)

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