EP0767512A1 - Attache d'un fil de terre au blindage d'un assemblage de câble et méthode de production - Google Patents

Attache d'un fil de terre au blindage d'un assemblage de câble et méthode de production Download PDF

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Publication number
EP0767512A1
EP0767512A1 EP95202655A EP95202655A EP0767512A1 EP 0767512 A1 EP0767512 A1 EP 0767512A1 EP 95202655 A EP95202655 A EP 95202655A EP 95202655 A EP95202655 A EP 95202655A EP 0767512 A1 EP0767512 A1 EP 0767512A1
Authority
EP
European Patent Office
Prior art keywords
ground wire
shield
crimp
cable
connector
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP95202655A
Other languages
German (de)
English (en)
Inventor
Martinus Hendricus Loman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Berg Electronics Manufacturing BV
Original Assignee
Berg Electronics Manufacturing BV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Berg Electronics Manufacturing BV filed Critical Berg Electronics Manufacturing BV
Priority to EP95202655A priority Critical patent/EP0767512A1/fr
Publication of EP0767512A1 publication Critical patent/EP0767512A1/fr
Withdrawn legal-status Critical Current

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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
    • H01R9/0518—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
    • H01R13/648—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]
    • H01R13/6581—Shield structure
    • H01R13/6582—Shield structure with resilient means for engaging mating connector
    • 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
    • H01R13/6593—Specific features or arrangements of connection of shield to conductive members the conductive member being a shielded cable the shield being composed of different pieces

Definitions

  • Figure 1a shows the end of the (shielded) multi-wire cable 16 having an insulating sheath 2.
  • the internal signal conductors 3 extend from the end of insulating sheath 2, which is stripped by proper stripping means known by a person skilled in the art.
  • An exposed ground wire 4 also extends from the insulating sheath 2.
  • Ground wire 4 may be one of the wires of the multi-wire cable 16 but may, alternatively, be a 'pig-tail' end part of a braided metal sheath surrounding the other conductors within the cable 16.
  • crimp ring 1 is crimped at the end of insulating sheath 2.
  • Figure 1a shows crimp ring 1 after crimping to the insulating sheath 2.
  • Crimp ring 1 then, immobilizes the internal conductors 3 and ground wire 4.
  • crimp ring 1 comprises at least one flange 5, the purpose of which will be explained below.
  • the individual wires 3 are loaded on a spread block 17, which is shown in figure 4, in order to establish a proper spacing between adjacent wires 3. Then, all wires 3 are cut to the same length and stripped as required. The stripped wires are, e.g. by soldering, connected to suitable terminals 18 (see also figure 4), which may be either female, male or hermaphrodite connected terminals.
  • the ground wire 4 is soldered to shield 8 in order to provide electrical connection, as shown in figure 1a.
  • the crimp ring 1 is located in an opening 15 between two extending lips 7 of shield 8 and cover shield 8', which may be identical to shield 8, is arranged on shield 8 in order to provide an electrically closed shielding. Lips 7 provide for a central location of crimp ring 1 within opening 15 and, by touching crimp ring 1, additional electrical connection security. This is shown in figure 1b.
  • FIG. 3a shows a top view of plastic cover 9 (as will be seen from the connector enclosure portion) and shows the inner surface of cover 9 which has to be put on shield 8.
  • Figure 3b shows a side view of cover 9.
  • cover 9 has two upstanding pegs 10 with respective ends 11, an opening for receiving crimp ring 1 and slots 13 for accommodating flanges 5 of crimp ring 1.
  • pegs 10 are inserted into corresponding holes in metal shields 8, 8'.
  • Another (similar) plastic cover (not shown), which may be identical to plastic cover 9 (of figure 3a and 3b), is arranged on both sides of metal shields 8, 8', however, from the opposite side as cover 9.
  • Cover 9 is provided with suitable holes 19 for receiving pegs from the other plastic cover.
  • Plastic cover 9 and the other plastic cover are pressed together and in this condition the ends 11 of pegs 10 of both plastic covers are heat-staked on protruding ends 11 formed to maintain the entire assembly tightly together.
  • Figure 4 shows a partly sectional view through the final product.
  • crimp ring 1 is shown partly cut away and partly in side view.
  • flanges 5 of crimp ring 1 are firmly accommodated in suitable slots 13 in plastic cover 9.
  • Such a construction provides for the required strain relief to the cable against pull and flexure, which is required to prevent deterioration, and subsequent rupture, of individual connections of the conductors 3 to connector 6. This applies both to conductors 3 and ground wire 4.
  • Metal shield 8 is usually a steel type of material resulting in a difficult soldering process to assure an electrical connection of good quality. Moreover, it results in the necessity to remove solder flux residues from the surface of shield 8.
  • the object of the present invention is provide a ground wire attachment to a shield in a connector which avoids the problems mentioned above.
  • the present invention provides an arrangement comprising a cable and a connector, the cable comprising at least one inner signal conductor and a ground wire and being provided with a crimp element on an insulating sheath for improving strain relief of the cable against pull and flexure, the connector comprising at least one shield element, and the ground wire being electrically connected to the at least one shield element characterized in that the ground wire is mechanically and electrically connected to the crimp element and the shield element is provided with a resilient means which, in the assembled state, is electrically connected to the crimp element.
  • the length of the ground wire extending from the insulating sheath is shorter than in the prior art arrangement resulting in less electromagnetic interference problems since the antenna-effect is smaller.
  • the crimp ring may be selected from any material suitable for solder connections thereby avoiding the difficulty of soldering the ground wire to a steel type shield element of the connector.
  • Another object of the present invention is to provide a method for producing a ground wire attachment as defined above which avoids the problems related to the prior art. According to the invention there is provided a method of manufacturing an arrangement defined above comprising the following steps:
  • Advantages of this method are that it is easier to put the ground wire in its intended location and that it is easier to access the location where the ground wire, the crimp element and the resilient means are to be soldered to one another.
  • An alternative method of manufacturing an arrangement according to the invention comprises the following steps:
  • the soldering step may be omitted resulting in a shortened manufacturing period.
  • FIGS. 2a, 2b, 5a, and 5b show intermediate steps during the assembly of a first and second embodiment, respectively, of a ground wire attachment according to the invention.
  • the same reference numbers refer to the same elements as in figures 1a, 1b, 3a, 3b, and 4.
  • At least one, but preferably both of metal shields 28, 28' of connector 26 according to the invention are provided with a sharp lip 12, which is preferably located at the centre of opening 25.
  • Ground wire 4 which may be of substantially less length than in the arrangement according to the prior art, is bent over the crimp ring 1 such that when crimp ring 1 is inserted into openings 25 and both shields 28, 28' are pressed to one another, one of the sharp lips 12 will directly make a pressure connection with ground wire 4.
  • ground wire 4 is arranged within a dimple 20 of crimp ring 1, resulting from crimping crimp ring 1 on cable 16, in order that ground wire 4 cannot easily slip away.
  • ground wire 4 is soldered to one another to provide the required, reliable electrical connection.
  • This step of soldering ground wire 4 to shield 28' may be done in a later manufacturing stage than in the method according to the prior art where it was done before pressing both shields 8, 8' together.
  • Putting ground wire 4 in its proper location is simpler than in the prior art arrangement.
  • the location where ground wire 4 has to be soldered to shield 28' is much easier to access than in the arrangement according to the prior art, which reduces manufacturing costs and shortens manufacturing time.
  • FIGs 5a, 5b show an alternative arrangement in accordance with the present invention.
  • ground wire 4 can be interposed between crimp ring 1 and insulating sheath 2 before crimping. Subsequent crimping, than, results in a pressure joint between the crimp ring 1 and ground wire 4 which avoids the need for a soldering operation to establish a reliable electrical connection between ground wire 4 and shield 28'.
  • shields 28, 28' need only be pressed against one another without the need to care for ground wire 4 not to slip away. Such pressing together is advantageously done by two plastic covers 9 (not shown in figures 5a, 5b) which are connected to one another like in the arrangement according to the prior art.
  • Sharp lips 12 will, than, automatically be pressure connected to the outer periphery of crimp ring 1 and, thereby, establish the desired electrical connection. No additional soldering step for soldering lips 12 to crimp ring 1 is needed in the arrangement according to figures 5a, 5b. However, it is to be understood that, if required, both ground wire 4 and lips 12 in the arrangement according to figure 5a, 5b may be connected to crimp ring 1 by soldering to improve the electrical connection.
  • lips 12 may be replaced by any other suitable resilient means, e.g., resilient spring like elements.

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  • Details Of Connecting Devices For Male And Female Coupling (AREA)
EP95202655A 1995-10-03 1995-10-03 Attache d'un fil de terre au blindage d'un assemblage de câble et méthode de production Withdrawn EP0767512A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP95202655A EP0767512A1 (fr) 1995-10-03 1995-10-03 Attache d'un fil de terre au blindage d'un assemblage de câble et méthode de production

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP95202655A EP0767512A1 (fr) 1995-10-03 1995-10-03 Attache d'un fil de terre au blindage d'un assemblage de câble et méthode de production

Publications (1)

Publication Number Publication Date
EP0767512A1 true EP0767512A1 (fr) 1997-04-09

Family

ID=8220680

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95202655A Withdrawn EP0767512A1 (fr) 1995-10-03 1995-10-03 Attache d'un fil de terre au blindage d'un assemblage de câble et méthode de production

Country Status (1)

Country Link
EP (1) EP0767512A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0977312A2 (fr) * 1998-07-16 2000-02-02 SUMITOMO WIRING SYSTEMS, Ltd. Connecteur blindé

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0168649A2 (fr) * 1984-06-22 1986-01-22 Japan Aviation Electronics Industry, Limited Connecteur pour câble coaxial
EP0224200A2 (fr) * 1985-11-22 1987-06-03 STEWART STAMPING CORPORATION (a Connecticut Corporation) Connecteur fiche et douille blindé

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0168649A2 (fr) * 1984-06-22 1986-01-22 Japan Aviation Electronics Industry, Limited Connecteur pour câble coaxial
EP0224200A2 (fr) * 1985-11-22 1987-06-03 STEWART STAMPING CORPORATION (a Connecticut Corporation) Connecteur fiche et douille blindé

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0977312A2 (fr) * 1998-07-16 2000-02-02 SUMITOMO WIRING SYSTEMS, Ltd. Connecteur blindé
EP0977312B1 (fr) * 1998-07-16 2004-11-03 SUMITOMO WIRING SYSTEMS, Ltd. Connecteur blindé

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