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
  • 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
  • H01R9/0527—Connection to outer conductor by action of a resilient member, e.g. spring
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
  • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
  • H01R43/20—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for assembling or disassembling contact members with insulating base, case or sleeve
  • H01R43/24—Assembling by moulding on contact members

Definitions

• the invention relates to a coaxial cable, in particular for the shielded transmission and transmission of high-frequency signals, according to claim 1 and a method for producing such a coaxial cable according to claim 8.
• Coaxial cables are often used to transmit high-frequency antenna signals in motor vehicles and are mostly used in large numbers in this application. For the cost-effective provision of the corresponding coaxial cable, a simple construction and simple assembly is of great importance.
• Connectors are often installed at the cable ends.
• strain relief must usually be provided, which protects the electrically effective contacts between the connector components and the cables against excessive mechanical tensile loads.
• crimp connections are often used for this purpose.
• EP 0 118 168 A1 describes a connector for a multi-pole shielded cable, in which a sleeve for contacting a shielding braid is inserted into the interior of the tubular shielding braid.
• a crimp connection is made using a separate additional outer sleeve.
• a connector for a single-pole coaxial cable in which the shield, which is constructed as a metal braid, is also contacted with its inside with a sleeve. Another sleeve is arranged on the outside of the shield, which is to ensure mechanical strain relief of the contact point by means of a crimp connection.
• the known cables have the disadvantage, among other things, that they are comparatively complex to manufacture and consist of a relatively large number of individual parts.
• the invention is therefore based on the object of providing a coaxial cable which can be produced with little production outlay and which is of high quality and robustness.
• the invention also provides a cost-effective method for producing and assembling such a coaxial cable.
• a contact sleeve is pushed or inserted between a shield and a dielectric when a plug connector, which forms one end of a coaxial cable, is attached.
• the contact sleeve is arranged in such a way that on the one hand it encloses the dielectric in a partial section and on the other hand it is enclosed by the screen.
• An encapsulation is carried out for the purpose of strain relief. In this way, a crimp connection or other measures for strain relief between the shield and the contact sleeve can be dispensed with.
• the outer contour of the extrusion coating has different distances from a core of the coaxial cable, so that forces can be transmitted in a form-fitting manner to a surrounding housing of a secondary locking device through this outer contour.
• enclosing is not to be understood in the following so that a layer which encloses another layer in the cable structure necessarily touches the other layer. Rather, an intermediate layer can also be arranged between two layers, one of which encloses the other.
• plug connectors are to be understood as electrical couplings which can be designed both as plugs and as sockets.
• FIG. 1 shows a longitudinal sectional view of a coaxial cable in a first manufacturing step
• FIG. 2 shows a longitudinal sectional view of the coaxial cable in a second manufacturing step
• FIG. 3a shows a longitudinal sectional view of the finished coaxial cable
• Figure 3b is a front view of the finished coaxial cable.
• FIG. 1 shows a longitudinal sectional view of a coaxial cable at the start of production.
• the single-pole coaxial cable has a core 1, which consists of an inner wire 1.1 and an inner contact 1.2.
• the inner wire 1.1 in turn consists of seven wires and is surrounded by an electrically non-conductive dielectric 2.
• This dielectric 2 is in turn surrounded by a screen 3, the two-layer screen 3 comprising an electrically conductive film 3.1, made of aluminum in the exemplary embodiment presented, and a metal braid 3.2.
• These two layers of the screen 3 are enclosed by a jacket 4, which simultaneously represents the outer layer of the coaxial cable, and consists of a PVC-based material.
• the screen 3 and the jacket 4 are cut to length such that the dielectric 2 protrudes with respect to the screen 3 and the jacket 4.
• the inner wire 1.1 also protrudes from the dielectric 2.
• the inner contact 1.2 is first mechanically and electrically contacted with a crimp connection.
• the inner wire 1.1 partially wise encompassing plastically deformed retaining webs of the internal contact 1.2 not visible.
• the plug connector in the exemplary embodiment shown a socket, comprises a one-piece, electrically conductive contact sleeve 5 made of metal, which, among other things, consists of an essentially hollow cylindrical section 5.1, the outer surface 5.3 of which has been roughened by setting grain points. As an alternative to this, roughening can also be carried out by indentations or corrugations or knurls.
• the contact sleeve 5 has a widened portion into which a plug can be inserted after assembly.
• An insulating body 5.2 made of plastic is located within the expanded partial area.
• the wall thickness of the contact sleeve 5 decreases towards the end which lies opposite the widened partial area. This conical configuration, which is achieved by obliquely twisting off the outer surface of the corresponding end of the contact sleeve 5, results in an annular circumferential cutting edge there.
• the contact sleeve 5 is pushed onto the protruding dielectric 2.
• the inner diameter of the contact sleeve 5 in the corresponding contact area is dimensioned such that the contact sleeve 5 can be displaced radially without play on the dielectric 2 in the direction X parallel to the axis.
• the contact sleeve 5 is inserted or inserted in the axis-parallel direction X between the screen 3 and the dielectric 2.
• the inner surface of the first section 5.1 of the contact sleeve 5 slides on the outer surface of the dielectric 2, so that the dielectric 2 serves as a guide for the contact sleeve 5 to be displaced.
• the outside of the section 5.1 of the contact sleeve 5 slides along the film 3.1, the film 3.1 being partially pushed together due to the shear forces generated.
• the metal braid 3.2 and the jacket 4 are slightly expanded in the corresponding area. This deformation results in radially oriented forces which press the screen 3 against the contact sleeve 5, so that the film 3.1 or the metal braid 3.2 are safely contacted in an electrically conductive manner with the contact sleeve 5. Furthermore, the roughening or the grain points of the outer surface of the section 5.1 of the contact sleeve 5 result in a higher holding or pulling force of the contact sleeve 5.
• the smooth film 3.1 as a component of the screen 3 has the advantage at this point that a comfortable and simple insertion of the contact sleeve 5 relative to the screen 3 is possible.
• the film 3.1 not only has advantages in terms of assembly, it is also provided in the cable structure in order to act as additional shielding attenuation when the coaxial cable is in operation.
• the contact sleeve 5 After the contact sleeve 5 has been introduced between the screen 3 and the dielectric 2, that is to say according to FIG. 2, the contact sleeve 5 encloses the dielectric 2 in a partial section 5.1 on the one hand and is enclosed by the screen 3 on the other hand. In this exemplary embodiment, the contact sleeve 5 touches both the metal mesh 3.2 and the film 3.1. At the same time, by moving the contact sleeve 5 in the X direction, the internal contact 1.2 is also introduced into the central bore of the insulating body 5.2.
• an insulating material in the exemplary embodiment shown a glass fiber-reinforced PP material, is applied as an encapsulation 6 around the jacket 4 and the contact sleeve 5 using an injection molding process.
• the encapsulation 6 adheres excellently to the contact sleeve 5, made of metal and the jacket 4, which, as already described, is based on a PVC material.
• a very good mechanical connection of the encapsulated parts is achieved, so that the encapsulation 6 serves as strain relief for the contacting of the section 5.1 with the screen 3, or the contact sleeve 5 relative to the screen 3 in FIG Is fixed for a strain relief.
• the extrusion coating 6 is designed geometrically such that circumferential ribs 6.1 are provided on the outside.
• the outer contour of the extrusion coating 6 accordingly has different distances r at points offset in the axis-parallel direction X; R to the inner vein 1.1 or to the core 1.
• the extrusion coating 6 serves not only as a strain relief element, but also for accommodating a surrounding housing.
• Such a housing is used to securely hold a connection from two connectors together.
• axially parallel forces (parallel to X) must be able to be introduced into the respective cables. These forces are transmitted by a positive fit between a secondary locking housing (not shown in the figures) and the extrusion coating 6.
• the ribs 6.1 thus serve for the positive transmission of axially parallel forces, the connection between the housing and the coaxial cable being torsion-free.
• Such a coaxial cable with plug connector is particularly suitable for use in motor vehicles for the transmission of high-frequency signals, such as antenna signals, in the 4 GHz range. Due to the structure, in particular due to the sealing and mechanically resilient overmolding, the coaxial cables according to the invention are particularly robust and of high quality.
• the invention is not limited to coaxial cables, the plug connector of which is aligned in the extension of the core 1 or along the axis X, the invention also includes coaxial cables with an angled plug connector.

Landscapes

• Coupling Device And Connection With Printed Circuit (AREA)
• Multi-Conductor Connections (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=34559245

Family Applications (1)

Country Status (6)

Families Citing this family (10)

Family Cites Families (33)

• 2003
  • 2003-10-30 DE DE10350607A patent/DE10350607A1/de not_active Withdrawn
• 2004
  • 2004-09-03 DE DE502004003993T patent/DE502004003993D1/de active Active
  • 2004-09-03 EP EP04764793A patent/EP1683235B1/fr active Active
  • 2004-09-03 AT AT04764793T patent/ATE363746T1/de not_active IP Right Cessation
  • 2004-09-03 WO PCT/EP2004/009839 patent/WO2005053103A1/fr active IP Right Grant
  • 2004-09-03 CN CNB200480032440XA patent/CN100452538C/zh active Active
  • 2004-09-03 US US10/578,112 patent/US20070049112A1/en not_active Abandoned

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events