EP3790125A1 - Ensemble de connexion à dispositif de sécurité passive protégé contre les décharges électriques,prise, connecteur d'airbag et procédé de montage d'un ensemble de connexion - Google Patents

Ensemble de connexion à dispositif de sécurité passive protégé contre les décharges électriques,prise, connecteur d'airbag et procédé de montage d'un ensemble de connexion Download PDF

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Publication number
EP3790125A1
EP3790125A1 EP20194433.7A EP20194433A EP3790125A1 EP 3790125 A1 EP3790125 A1 EP 3790125A1 EP 20194433 A EP20194433 A EP 20194433A EP 3790125 A1 EP3790125 A1 EP 3790125A1
Authority
EP
European Patent Office
Prior art keywords
connector
squib
socket
counter
contact
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.)
Pending
Application number
EP20194433.7A
Other languages
German (de)
English (en)
Inventor
Stéphane BARLERIN
René Lehmann
Youssef BOURI
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.)
Aptiv Technologies Ltd
Original Assignee
Aptiv Technologies Ltd
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 Aptiv Technologies Ltd filed Critical Aptiv Technologies Ltd
Publication of EP3790125A1 publication Critical patent/EP3790125A1/fr
Pending 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
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/70—Structural association with built-in electrical component with built-in switch
    • H01R13/703—Structural association with built-in electrical component with built-in switch operated by engagement or disengagement of coupling parts, e.g. dual-continuity coupling part
    • H01R13/7031—Shorting, shunting or bussing of different terminals interrupted or effected on engagement of coupling part, e.g. for ESD protection, line continuity
    • H01R13/7033—Shorting, shunting or bussing of different terminals interrupted or effected on engagement of coupling part, e.g. for ESD protection, line continuity making use of elastic extensions of the terminals
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B3/00—Blasting cartridges, i.e. case and explosive
    • F42B3/04—Blasting cartridges, i.e. case and explosive for producing gas under pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C15/00—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
    • F42C15/40—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein the safety or arming action is effected electrically
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C19/00—Details of fuzes
    • F42C19/02—Fuze bodies; Fuze housings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C19/00—Details of fuzes
    • F42C19/06—Electric contact parts specially adapted for use with electric fuzes
    • 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
    • H01R13/02—Contact members
    • H01R13/03—Contact members characterised by the material, e.g. plating, or coating materials
    • 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
    • H01R13/02—Contact members
    • H01R13/03—Contact members characterised by the material, e.g. plating, or coating materials
    • H01R13/035—Plated dielectric material
    • 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  
    • H01R13/6485—Electrostatic discharge protection
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R2201/00—Connectors or connections adapted for particular applications
    • H01R2201/26—Connectors or connections adapted for particular applications for vehicles

Definitions

  • the invention relates to the field of automotive connector systems and more particularly to the field of connector systems for passive motor-vehicle safety devices such as airbags, seat-belt pretensioners, etc., such devices also being referred to as safety restraint systems (SRS).
  • SRS safety restraint systems
  • passive safety devices may comprise gas-generating squibs the ignition of which is electronic.
  • the squib comprises a squib connector, itself coupled to a connector called the airbag connector.
  • the airbag connector a connector that is connected, via electrical wires, to a control device for triggering a squib is referred to generically as an "airbag connector", irrespectively of whether the squib is a squib intended to inflate an airbag, pretension a seat belt, or otherwise.
  • the squib When a shock exceeds a set deceleration or acceleration threshold, the squib is triggered by the control device, which is programmed to send a signal to the squib to which it is connected, via electrical wires and an airbag connector.
  • the explosion that results therefrom engenders a sudden combustion that induces a high gas pressure in a piston (pretensioner) or an inflatable bag (airbag).
  • the reader may for example refer to document EP1009070A2 for a description of a connector of this type.
  • a squib could also trigger under the effect of an electrostatic discharge, notably at the moment at which the airbag connector is coupled to the connector of the squib.
  • the reader may for example refer to document EP3116075A1 for a description of a connector of this type.
  • a connection assembly for a passive motor-vehicle safety device comprising a squib connector and a counter-connector (therefore an airbag connector) coupled to the squib connector.
  • the squib connector is housed in an electrically conductive metal squib body connected to the ground of the vehicle. It comprises a socket mounted in the squib body, and two squib-connector contacts electrically connected to the squib and each respectively coupled to one contact of the counter-connector.
  • the socket is passed through by the two contacts of the squib connector, and the counter-connector comprises a casing in which are housed at least two contacts of the counter-connector.
  • At least one of the elements of the list comprising the socket and the casing of the counter-connector comprises an electrically dissipative material, in electrical continuity, on the one hand, with one of the contacts of the counter-connector and, on the other hand, with the squib body.
  • connection assembly also optionally comprises one or more of the following features, each of which may be implemented independently or in combination with one or more others:
  • a socket for a connection assembly such as mentioned above is proposed.
  • This socket then comprises a body comprising an electrically dissipative material, extending between at least a first surface intended to be in electrical continuity with the squib body of a squib, and a second surface intended to be in electrical continuity with at least one contact of the counter-connector.
  • an airbag connector comprising a casing in which are housed at least three contacts. Two of these three contacts are each respectively connected to one electrical wire. The third contact is not connected in the airbag connector to an electrical wire.
  • the casing comprises an electrically dissipative material, in electrical continuity with, on the one hand, at least one of the contacts, which is connected to one electrical wire, and, on the other hand, with the contact not connected to an electrical wire.
  • At least one of the elements comprising the body of the socket and the casing of the counter-connector comprises an electrically dissipative material
  • the squib connector and the counter-connector are coupled by placing the electrically dissipative material in electrical continuity, on the one hand, with one of the contacts of the counter-connector and, on the other hand, with the squib body.
  • the set 1 of connectors comprises a squib connector 2 and an airbag connector 3 forming a counter-connector.
  • the squib connector 2 comprises a socket 4 housed in a cavity of a metal squib body 5, and two squib-connector contacts 6 (not shown in Figure 1 ). These two contacts 6 are male contacts each comprising a pin housed in a cavity 7 provided in the socket 4.
  • the socket 4 is made of an electrically dissipative material.
  • this material is a polymer having a surface resistivity comprised between 10 7 and 10 11 ohms (of course, the surface resistivity may be chosen depending on the area of contact between the electrically dissipative material and a contact of the airbag connector and/or the squib body 5).
  • the socket 4 makes mechanical and electrical contact with the squib body 5.
  • each of the male contacts 6 is electrically insulated from the socket 4.
  • the airbag connector 3 comprises a casing 8, a cover 9, a device 10 for assuring the position of the connectors (i.e. a CPA device, CPA being the acronym of connector position assurance), a ferrite block 11, and two female contacts 12 that are each respectively suitable for coupling with one male contact 6 of the squib connector 2.
  • the female contacts 12 are each electrically connected to a control circuit, via electrical wires 13.
  • the contacts 12 of the airbag connector 3 each comprise a contact segment 12 for making an electrical contact with a pin of the squib connector 2, a crimping segment 15 for making an electrical connection with the control circuit and a short-circuit contact 16.
  • the crimping segments 15 of each of the contacts 12 are each respectively inserted into a passage provided in one ferrite block 11.
  • the short-circuit contact 16 of each contact 12 extends, in a direction essentially parallel to the contact segment 14, between the contact segment 14 and the crimping segment 15.
  • the short-circuit contact 16 of each contact 12 is formed from an elastic strip, the respective elastic strips of each of the contacts 12 drawing closer to one another in order to make contact with one another.
  • the device 10 for assuring the position of the connectors is in high position, i.e. a position raised with respect to the upper face of the cover 9.
  • the device 10 for assuring the position of the connectors does not interact with the short-circuit contacts 16.
  • the short-circuit contacts 16 are elastically in electrical contact with each other and make a short-circuit between the contacts 12 of the airbag connector 3.
  • the squib connector 2 and airbag connector 3 are in a pre-coupling position in which the respective contacts 6, 12 of the squib connector 2 and of the airbag connector 3 make electrical contact.
  • the squib connector 2 and airbag connector 3 are not completely coupled and, on the other hand, the short-circuit contacts 16 still short-circuit the contacts 12 of the airbag connector 3 (see Figure 6 ), but also the contacts 6 of the squib connector 2 since they are now in electrical continuity with those of the airbag connector 3, which themselves are short-circuited.
  • the device 10 for assuring the position of the connectors is still blocked in high position and still does not interact with the short-circuit contacts 16. Thus, any electrical charge disperses without creating a potential difference between the contacts 6 of the squib connector.
  • the movement of the device 10 for assuring the position of the connectors is unblocked.
  • the device 10 for assuring the position of the connectors may therefore be lowered to level with the upper face of the cover 9.
  • a finger 17 of the device 10 for assuring the position of the connectors becomes inserted between the respective strips of the short-circuit contacts 16.
  • any electric charge may be evacuated through the socket 4, to the squib body 5 and to the ground of the vehicle, without creating a significant potential difference between the contacts 6 of the squib and ground.
  • connection assembly remains identical to a prior-art connection assembly, with the exception that the material from which the socket 4 is made is an electrically dissipative material instead of being an electrically insulating material.
  • This has the advantage of making it possible to continue to manufacture and use all the parts of the prior-art connection assembly, except the socket 4, and to avoid the need to manufacture new ones.
  • the socket 4 and more particularly its finger 17 for example is extended toward and/or into the airbag connector.
  • Figure 8 shows one variant of the embodiment of the connection assembly shown in Figure 7 .
  • the strips of the short-circuit contacts 16 have been lengthened and the cavities 19 in the electrically dissipative material are deeper in order to improve the quality of the mechanical and electrical contact between the short-circuit contacts 16 and the electrically dissipative material of the socket 4.
  • connection assembly 1 is shown in Figure 9 .
  • This embodiment differs from the preceding one essentially in that it does not comprise a device 10 for assuring the position of the connectors.
  • a device 10 for assuring the position of the connectors Features that are identical or similar to those of the connection assembly 1 of the preceding embodiment will not be described again.
  • Figures 9 and 10 show configurations similar to those shown in Figures 3 and 4 , respectively.
  • a finger 20 of the socket 4 that opens the short-circuit instead of the finger 17 of the device 10 for assuring the position of the connectors.
  • the strips of the short-circuit contacts 16 rest on this finger 20, via which they make electrical and mechanical contact with the electrically dissipative material of the socket 4.
  • Figures 12 to 14 show variants of the embodiments described above.
  • a device 10 for assuring the position of the connectors is shown in these figures, but the features described below may also be employed in connection assemblies 1 not comprising a device 10 for assuring the position of the connectors.
  • protuberances 21 are provided on the socket 4, at the points of contact between, on the one hand, the short-circuit contacts 16 and, on the other hand, the squib body 5.
  • the electrically dissipative material is advantageously a polymer, or even an elastomer
  • these protuberances 21 form points of elastic pressure that improve the electrical continuity between the electrically dissipative material and, on the one hand, the short-circuit contacts 16 and, on the other hand, the squib body 5.
  • an electrically conductive metal element 22 is inserted between the electrically dissipative material of the socket 4 and the squib body 5.
  • This metal element 22 allows the area between the electrically dissipative material and a material that electrically is a good conductor to be increased.
  • this metal element 22 comprises elastic segments 23 that are placed in contact with the squib body 5. This also allows the electrical continuity between the electrically dissipative material and the squib body 5 to be improved.
  • This metal element 22 may or may not be combined with protuberances 21 such as described with reference to Figure 12 .
  • an electrically conductive metal element 24 is inserted, in the cavity 19 of the socket 4, between the electrically dissipative material and each (or at least one) of the short-circuit contacts 16.
  • this metal element 14 allows the area between the electrically dissipative material and a conductive material to be increased. This therefore also allows the electrical continuity between the short-circuit contacts 16 and the squib body 5, via the electrically dissipative material, to be improved.
  • This metal element 24 may or may not be combined with protuberances 21 such as described with reference to Figure 12 and/or a metal element 22 such as described with reference to Figure 13 .
  • Figure 15 shows a socket 4 compatible with a third embodiment of a connection assembly.
  • this third embodiment one of the pins of the contacts 6 of the squib connector 2 is placed in mechanical and electrical contact with the electrically dissipative material from which the socket 4 is made.
  • the electrically dissipative material is itself in electrical continuity with the squib body 5, which is itself grounded. Therefore, if a potential difference were to arise between the squib contacts 6 and ground, the deficiency or excess of electrical charge on these contacts could be neutralized via the connection to ground.
  • the airbag connector 3 comprises a casing 8 made of an electrically dissipative material and a third contact 25.
  • This third contact 25 is not electrically connected on the side of the airbag connector 3 to an electrical wire. In contrast, it makes contact with the electrically dissipative material of the casing 8 that itself makes contact with at least one of the two other contacts 12 (in the illustrated example the electrically dissipative material of the casing 8 makes contact with both other contacts 12).
  • the third contact 25 comprises a segment than penetrates into the socket 4 and makes an electrical contact with a metal clip 26 that is integrated into the socket 4. This metal clip 26 is electrically connected to the squib body 5 by elastic tabs 27, and the squib body 5 is itself connected to ground.
  • the electrically dissipative material from which the socket 4 or casing 8 is made is at least partially coated with a layer of electrically conductive metal material.
  • This electrically conductive coating is formed on the socket 4 or casing 8 for example using MID (moulded interconnect device) technology.
  • This electrically conductive coating is placed at least on those regions of the socket or of the casing that are intended to make electrical contact with the squib body 5 and/or a contact 12, 16.
  • connection assembly 1 To mount a connection assembly 1 according to one of the embodiments described above or the variants thereof,
  • the squib connector 2 and the airbag connector 3 are coupled by placing the electrically dissipative material from which the socket 4 or casing 8 is made in electrical continuity on the one hand with one of the contacts of the airbag connector 3 and on the other hand with the squib body 5.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)
EP20194433.7A 2019-09-05 2020-09-03 Ensemble de connexion à dispositif de sécurité passive protégé contre les décharges électriques,prise, connecteur d'airbag et procédé de montage d'un ensemble de connexion Pending EP3790125A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1909791A FR3100666B1 (fr) 2019-09-05 2019-09-05 Ensemble de connexion pour dispositif de sécurité passive, protégé contre les décharges électrostatiques

Publications (1)

Publication Number Publication Date
EP3790125A1 true EP3790125A1 (fr) 2021-03-10

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EP20194433.7A Pending EP3790125A1 (fr) 2019-09-05 2020-09-03 Ensemble de connexion à dispositif de sécurité passive protégé contre les décharges électriques,prise, connecteur d'airbag et procédé de montage d'un ensemble de connexion

Country Status (2)

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EP (1) EP3790125A1 (fr)
FR (1) FR3100666B1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0745519A1 (fr) * 1995-05-30 1996-12-04 Morton International, Inc. Broche et douille avec manchon pour générateur de gaz
EP0802092A1 (fr) * 1996-04-15 1997-10-22 Morton International, Inc. Initiateur résistant à haute pression protégé contre les décharges électrostatiques par un varistor à oxyde de métal intégral
EP1009070A2 (fr) 1998-12-07 2000-06-14 Framatome Connectors International Connecteur électrique filtré avec multiples éléments de ferrite
US20120256406A1 (en) * 2011-04-08 2012-10-11 Autoliv Asp, Inc. Initiator with molded esd dissipater
US20130309884A1 (en) * 2011-02-01 2013-11-21 Tyco Electronics France Sas Electrical connector for a safety restraint system having a ground contact
EP3116075A1 (fr) 2015-07-08 2017-01-11 Delphi Technologies, Inc. Connecteur électrique pour un système de retenue de sécurité

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0745519A1 (fr) * 1995-05-30 1996-12-04 Morton International, Inc. Broche et douille avec manchon pour générateur de gaz
EP0802092A1 (fr) * 1996-04-15 1997-10-22 Morton International, Inc. Initiateur résistant à haute pression protégé contre les décharges électrostatiques par un varistor à oxyde de métal intégral
EP1009070A2 (fr) 1998-12-07 2000-06-14 Framatome Connectors International Connecteur électrique filtré avec multiples éléments de ferrite
US20130309884A1 (en) * 2011-02-01 2013-11-21 Tyco Electronics France Sas Electrical connector for a safety restraint system having a ground contact
US20120256406A1 (en) * 2011-04-08 2012-10-11 Autoliv Asp, Inc. Initiator with molded esd dissipater
EP3116075A1 (fr) 2015-07-08 2017-01-11 Delphi Technologies, Inc. Connecteur électrique pour un système de retenue de sécurité

Also Published As

Publication number Publication date
FR3100666B1 (fr) 2022-09-02
FR3100666A1 (fr) 2021-03-12

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