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
  • 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
  • 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
  • H01R12/594—Fixed connections for flexible printed circuits, flat or ribbon cables or like structures for shielded flat 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
  • 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]
• • 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

Definitions

• the present invention relates to a shielded electrical cable connector, and more particularly to a shielded electrical cable connector making it possible to establish a direct electrical and mechanical connection between a shielding and a connector element ensuring the protection of the electric cable against electromagnetic interference by means of a holding ferrule.
• the invention also relates to a method of assembling such a connector.
• the shielding of an electric cable serves to immunize the conductor, that is to say to protect it from surrounding electromagnetic disturbances produced in particular by neighboring cables or an adjacent electronic system, to preserve the integrity of the signals that run through the conductor.
• the shielding also makes it possible to protect the adjacent cables or the neighboring electronic system from the electromagnetic emissions of the driver. Shielding is particularly necessary in aeronautics and space where one strongly wishes to be protected against accidental signal faults.
• the ends of the cables are connected to connectors: the conductors of the cables are joined to conductors of the connector, for example electrical plugs, and the shielding is set to a single and determined potential which is in practice the potential of the apparatus or of the vehicle in which the electric cable is used.
• the cable conductor is often surrounded by one or more insulating sleeves, themselves surrounded by the shield.
• the shield may itself be surrounded by a protective sheath.
• the connectors of the prior art comprise tubular casings of circular or rectangular section.
• the electric cables are inserted by one end rear of the housings.
• the stripped ends of the conductors are then in the front part of the housings.
• the connectors of the prior art propose to perform the shielding recovery by assembling the shield around or inside a back cover ("backshell” in English). ) metallic.
• This rear cover can extend inside a connector housing and to the bare ends of the conductors, thus ensuring their electromagnetic protection.
• the connectors of the prior art often comprise a large number of elements in order to obtain on the one hand a reliable mechanical connection between the shield and the metal sleeve, and on the other hand a reliable mechanical connection between the sleeve metal and the connector housing.
• the invention therefore aims to at least partially overcome the disadvantages of the prior art by providing a connector providing electromagnetic protection of electrical cables by allowing a simplified electrical and mechanical connection between a shield and a connector element.
• the subject of the invention is a connector for shielded electrical cable, said shielded electrical cable comprising at least one conductor and a shielding at least partially covering said shielded electrical cable, said connector comprising a connector housing in which the conductor is arranged, characterized in that said shield is partially arranged around said connector housing, said connector housing being electrically conductive, and said connector comprising a holding ferrule arranged around said shield so as to maintain said shield in mechanical and direct electrical connection with the connector housing.
• said holding ferrule has a rear end applying pressure on the shield toward the connector housing to provide a mechanical and electrical connection between the shield and the connector housing on a connector.
• first connection area on the entire perimeter of the connector housing.
• said connector housing has positioning means and the holding ferrule has a front end, the front end is folded against the positioning means, so as to form a second connection allowing a mechanical connection between the holding ferrule and the connector housing.
• the holding ferrule extends at least from the rear face of the connector housing to the positioning means which it covers thereby forming two mechanical stops between the retaining ferrule and the connector housing.
• the holding ferrule is deformed toward the connector housing, thereby forming a third connection area for mechanical and electrical connection between the shield and the connector housing.
• the connector housing has a first large face and a second large face, said first and second major faces having openings, characterized in that the holding ferrule is pressed towards the housing connector at the apertures so that the shield is partially entrained in the apertures.
• the connector has a substantially rectangular cross section.
• the electrical cable comprises a protective sheath arranged around the shield, the holding ferrule is arranged around the protective sheath so as to maintain the protective sheath around the shield around the shield.
• the invention also relates to a shielded electrical cable connector assembly method, the shielded electrical cable comprises at least one conductor and a shielding at least partially covering the shielded electrical cable, the connector comprises a connector housing and a ferrule having a rear end and distinct front ends, the method comprises the following steps:
• the holding ferrule is threaded around the shield so as to clamp the rear end of the holding ferrule around the shield and thus clamp the shield around the connector housing so as to form a first connection zone, allowing a connection electrical and mechanical connection between the shield and the connector housing,
• the front ends of the holding ferrule are crimped against the connector housing, so as to form a second connection area for mechanical connection between the holding ferrule and the connector housing.
• the connector housing has positioning means, the distinct front ends are crimped against the positioning means.
• the method comprises the further step wherein:
• the ferrule is held in the direction of the connector housing so as to form a third connection area, allowing electrical and mechanical connection between the shield and the connector housing.
• the connector housing has openings, the holder ferrule is pressed into the openings so as to cause the shielding in the openings to form the third connection area.
• FIG. 1 represents an exploded view of the connector of shielded electrical cables as well as electrical cables and their shielding
• FIG. 2 represents a perspective view of a shield arranged around a connector housing
• FIG. 3 represents a perspective view of a holding ferrule
• FIG. 4 represents a perspective view of a first connection zone and a second connection zone of the connector
• FIG. 5 represents a sectional view of FIG. the first connection zone and the second connection zone of the connector
• FIG. 6 represents a perspective view of the first connection zone, the second connection zone and a third connection zone of the connector
• FIG. 7 represents a schematic diagram of a connector manufacturing process
• FIG. 8 shows a perspective view of the holding ferrule threaded around the shield, itself threaded around the connector housing;
• FIG. 9 is a sectional view of a crimping step of the holding ferrule against the connector housing
• FIG. 10a represents a sectional view of the connector having the three connection zones
• Figure 10b shows a sectional view of the connector having the first connection area, the second connection area and a variant of the third connection area.
• FIG. 1 represents an exploded perspective view of the shielded electrical cable connector 1 and a plurality of electric cables 3.
• An electrical cable 3 generally comprises a central conductor for example an electrical wire or a plurality of electrical wires (not shown) traversed by an electrical signal.
• the driver is often protected by one or more insulating sleeves to avoid short circuits with neighboring conductors.
• This shield 5 may for example comprise a metal braid.
• a longitudinal axis X is defined according to the length of the electric cable 3, a transverse axis Y according to the width of the connector 1, and a vertical axis Z according to the height (or thickness) of the connector 1. These three axes are substantially orthogonal and presenting the same origin O. These three axes XY, Z serve as reference for all the figures included herein.
• the connector 1 has a substantially rectangular section.
• the connector 1 comprises a connector housing 7, at least one inner sleeve 9 for an electric cable 3 and a holding ferrule 11.
• the connector housing 7 is electrically conductive. It may for example be made of metal material.
• the connector housing 7 has an open rear face 8 through which at least one electrical cable 3 is inserted into an inner sleeve 9.
• the connector housing 7 comprises for example a matrix (not shown) of insulating material for accommodating the inner sleeve 9.
• the connector housing 7 may have a plurality of internal sleeves 9 each adapted to receive an electric cable 3.
• the inner sleeves 9 are for example made of insulating material for example plastic.
• the ends of the cables are stripped to reveal the conductors.
• the matrix and the internal sleeves 9 make it possible to form a connection zone of the connector 1.
• a male connector or a female connector is manufactured according to the shape of the matrix and sleeves.
• the internal sleeves 9 constrain the displacement of the electrical cables 3 along the transverse axis Y and the vertical axis Z, and thus prevent stripped ends of the conductors coming into contact with each other and thus cause short circuits.
• the conductors are held inside the inner sleeves 9 for example by clipping, gluing or crimping.
• the connector housing 7 has a tubular shape of substantially rectangular section.
• the connector housing 7 has four faces comprising a first and a second large face 15a, 15b parallel to each other, connected by a first and a second small face 17a, 17b parallel to each other.
• the four faces 15a, 15b, 17a, 17b have an outer surface.
• the outer surface of the connector housing 7 has a positioning means 21a, 21b for positioning the shield 5 around the connector housing 7.
• the positioning means comprises for example an upper rib 21a extending across the width of the first large housing face 15a, and a lower rib portion 21b extending across the width of the second major housing face 15b.
• Figure 2 shows the shield 5 assembled around the connector housing 7.
• the shielding sheath 5 is threaded through the back of the connector housing 7 and abuts the positioning means 21a, 21b.
• the first major face 15a, and the second major face 15b may have a plurality of openings 14 distributed transversely. These openings 14 are for example through openings obtained by punching or machining of the connector housing 7. These openings 14 can improve the electrical continuity between the shield 5 and the connector housing 7 as explained in the following description.
• the outer surface of the connector housing 7 has securing means 19 for securing the connector housing 7 with a connector housing conjugate (not shown) and thereby establish a mechanical connection between the connector housing and the conjugate connector housing.
• These fastening means 19 comprise for example a front rib extending on the outer surface of the connector housing 7 around a cross section, substantially at the front of the connector housing 7.
• the front rib may for example have openings allowing the passage of screws.
• the connector housing 7 may further include alignment means 18 for alignment between the connector housing and the conjugate connector housing and thus to ensure good mechanical and electrical connection therebetween.
• These alignment means 18 may for example comprise ribs or grooves on the connector housing 7, the conjugate connector housing carrying the complementary grooves or ribs.
• the connector housing 7 may further have a bias key 20, to assemble it with the desired conjugate conductor housing, the conjugate conductor housing having a complementary bias key.
• the connector 1 also comprises a holding ferrule 11 as represented by FIG.
• the holding ferrule 11 has a tubular shape of rectangular section and comprises a first large face of ferrule 23 parallel to a second large face of ferrule 25.
• the two large ferrule faces 23, 25 are connected by a first small face of ferrule 27 and a second small ferrule face 29. All the ferrule faces 23, 25, 27, 29 have a substantially rectangular shape.
• the holding ferrule 11 also has a front opening 31 and a rear opening 33, both having a substantially rectangular shape.
• the holding ferrule 11 is for example obtained by deformation of a metal sheet, for example stainless steel.
• the holding ferrule 11 has a front end 35 and a rear end
• the front end 35 has four distinct end portions 35a, 35b, 35c, 35d delimited by dotted lines and issuing respectively from the four ferrule faces 23, 25, 27, 29. These four distinct end portions 35a, 35b, 35c, 35d are for example obtained by cutting the corners of the front end 35 of the holding ferrule 11.
• the rear end 37 is folded towards the inside of the holding ferrule 11, substantially perpendicular to the ferrule faces 23, 25, 27, 29.
• the size of the rear opening 33 is therefore reduced relative to the size of the front opening 31.
• the size of the rear opening 33 is smaller than the size of the rear face 8 of the connector housing 7.
• the rear end 37 of the holding ferrule 11, arranged around the connector housing 7 applies a pressure on the shielding sheath 5 towards the connector housing 7.
• this pressure is distributed on the perimeter of the shielding sheath 5 and allows a connection between the shield 5 and the connector housing 7 on a connection zone I, called the first connection zone I.
• the connection established by the holding ferrule 11 between the shielding 5 and the connector housing 7 is a shielding recovery.
• the first connection area / allows a mechanical connection, to hold firmly the shielding sheath 5 around the connector housing 7 when the connector 1 is subjected to external stresses.
• the protection against electromagnetic interference remains ensured when the connector is subjected to shocks and / or vibrations.
• This first contact zone / also allows an electrical connection between the shield 5 and the connector housing 7 over the entire perimeter of the connector 1 thus ensuring the electrical continuity between the shield 5 and the connector 1.
• the connector housing 7 being metallic and covering the bare conductor ends, it itself provides their electromagnetic protection.
• the connector 1 improves the electromagnetic protection with respect to the prior art. Indeed, by directly connecting the shield 5 to the element providing protection against electromagnetic disturbances rather than an intermediate element is reduced the risk of loss of electrical continuity. In addition, by reducing the number of elements necessary for the protection against electromagnetic disturbances, connector 1 is simplified and its size is reduced.
• the holding ferrule 11 extends at least from the rear face 8 of the connector housing 7, to the positioning means 21a, 21b that it covers thereby forming two mechanical stops between the holding ferrule 11 and the connector housing. 7.
• Two of the distinct end portions 35a, 35b of the holding ferrule 11 are respectively crimped against the upper rib 21a and against the lower rib 21b.
• connection zone 11 a connection zone 11 which is a mechanical connection between the holding ferrule 11 and the connector housing 7.
• FIG. longitudinal axis X shows a schematic sectional view of the connector 1 along the longitudinal axis X.
• the first connection zone I and the second connection zone II can be seen.
• the holding ferrule 11 protects the shield 5 around the connector housing 7 along its entire length.
• the shield 5 is not subjected to external stresses that could damage it.
• the end of the braid subjected to environmental stress could break down over time.
• the large ferrule faces 23, 25 are deformed in the direction of the connector housing 7 at a connection zone III located between the first connection zone I and the second zone connection 77, called third connection zone III.
• This third contact zone III makes it possible to establish an electrical connection and a mechanical connection between the connector housing 7 and the shielding 5 and thus improves the shielding recovery.
• the third connection zone III is located at the openings 14.
• the electrical cables 3 are protected by the internal sleeves 9 and are therefore not damaged by the deformation.
• the connector 1 has only the first connection zone / and the second connection zone II.
• the electric cable 3 may also comprise a protective sheath arranged around the shielding 5 in order to protect the shielding 5.
• a protective sheath arranged around the shielding 5 in order to protect the shielding 5.
• certain shielding sheaths 5 may be fragile and easily damaged.
• the protective sheath makes it possible to avoid short circuits between the shielding 5 and other adjacent electrical elements.
• the protective sheath may be for example a plastic wire braid such as PET (Polyethylene terephthalate) or PPS (Polyphenylene sulfide.
• the protective sheath is also threaded around the connector housing 7 to the level of the positioning means 21a, 21b.
• the holding ferrule 11 is placed around the protective sheath.
• the connector 1 has the first connection area / and the second connection area II as previously described.
• the holding ferrule 11 applies a pressure on the protective sheath which itself applies a pressure on the shield 5 at the level of the first contact zone I.
• the holding ferrule 11 applies a pressure on the protective sheath 41 which itself applies a pressure on the shield 5.
• the invention also relates to an assembly method for obtaining a shielded electrical cable connector as described above. This process is shown schematically in FIG.
• the shield 5 is threaded around the connector housing 7 so that the shield 5 comes into abutment against the positioning means 21a, 21b.
• the holding ferrule 11 as shown in FIG. 3 is threaded around the shield 5.
• the rear end 7 being folded back, the rear opening 33 of the ferrule is of reduced size relative to the rear face 8 of the connector housing 7.
• the rear end 37 of the holding ferrule 11 abuts against the rear face 8 of the connector housing 7.
• the holding ferrule 11 is driven along the longitudinal axis X so as to tighten it around the shield 5.
• This makes it possible to tighten the shield 5 around the connector housing 7 all around the perimeter of the connector housing 7.
• This forms the first connection zone /, represented by diagonal hatching, allowing a mechanical and electrical connection between the shield 5 and the connector housing 7.
• the electrical continuity between the shield 5 and the connector housing 7 is ensured.
• Crimping is represented by arrows 39.
• the distinct front ends 35c, 35d abutting against the fastening means 19 make it possible to maintain the holding ferrule 11 correctly positioned and prevents unwanted deformations.
• the crimping may for example be performed with a blade for folding the distinct front ends 35a and 35b against the positioning means 21a, 21b.
• step E4 stamping the holding ferrule 11 shown in FIG. 10a
• the holding ferrule 11 is pressed on the two large ferrule faces 23, 25.
• the third connection zone III is thus established. represented by vertical hatching, allowing a mechanical and electrical connection between the shield 5 and the connector housing 7.
• the electrical continuity between the shield 5 and the connector housing 7 is enhanced.
• This third connection zone III is located between the first connection zone I and the second connection zone II along the longitudinal axis X, and extends transversely on the two large ferrule faces 23, 25.
• Stamping is represented by arrows 40.
• the stamping may for example be carried out with a succession of punches, for example of conical or spherical shape.
• the holding ferrule 11 is pressed into these openings 14, as shown in Figure 10b.
• the shield 5 is driven into the openings 14.
• the pressure exerted by the holding ferrule 11 on the shield 5 at the edge of the openings 41 and the connector housing 7 is high. Therefore, the electrical and mechanical connection is improved. It is therefore understood that by directly connecting the shield 5 to the connector housing 7 configured to protect the conductors against disturbances electromagnetic, the protection against electromagnetic disturbances is improved. In addition, it reduces the number of parts required and we obtain a connector 1 more compact and simplified.
• the first 1, second 11 and third 111 connection areas of the connector 1, ensure good electrical continuity and mechanical strength of the connector 1.
• the method for assembling such a shielded electrical cable connector is simple to implement.

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• Details Of Connecting Devices For Male And Female Coupling (AREA)

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• 2012
  • 2012-05-16 FR FR1201414A patent/FR2990803B1/fr not_active Expired - Fee Related
• 2013
  • 2013-05-14 US US14/401,291 patent/US9935404B2/en active Active
  • 2013-05-14 WO PCT/EP2013/059965 patent/WO2013171230A1/fr active Application Filing
  • 2013-05-14 EP EP13729270.2A patent/EP2850697B1/de active Active

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