EP4331061A1 - Connecteur pour systèmes d'amorçage de coussins gonflables - Google Patents

Connecteur pour systèmes d'amorçage de coussins gonflables

Info

Publication number
EP4331061A1
EP4331061A1 EP22725758.1A EP22725758A EP4331061A1 EP 4331061 A1 EP4331061 A1 EP 4331061A1 EP 22725758 A EP22725758 A EP 22725758A EP 4331061 A1 EP4331061 A1 EP 4331061A1
Authority
EP
European Patent Office
Prior art keywords
airbag
contact
plug connection
ignition systems
systems according
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
EP22725758.1A
Other languages
German (de)
English (en)
Inventor
Alfred Annecke
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.)
Amphenol Tuchel Electronics GmbH
Original Assignee
Amphenol Tuchel Electronics GmbH
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 Amphenol Tuchel Electronics GmbH filed Critical Amphenol Tuchel Electronics GmbH
Publication of EP4331061A1 publication Critical patent/EP4331061A1/fr
Pending legal-status Critical Current

Links

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
    • H01R13/46—Bases; Cases
    • H01R13/502—Bases; Cases composed of different pieces
    • H01R13/504—Bases; Cases composed of different pieces different pieces being moulded, cemented, welded, e.g. ultrasonic, or swaged together
    • 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
    • H01R13/46—Bases; Cases
    • H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
    • H01R13/5205—Sealing means between cable and housing, e.g. grommet
    • 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
    • H01R13/46—Bases; Cases
    • H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
    • H01R13/5216—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases characterised by the sealing material, e.g. gels or resins
    • 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
    • H01R13/40—Securing contact members in or to a base or case; Insulating of contact members
    • H01R13/42—Securing in a demountable manner
    • H01R13/428—Securing in a demountable manner by resilient locking means on the contact members; by locking means on resilient contact members
    • H01R13/432—Securing in a demountable manner by resilient locking means on the contact members; by locking means on resilient contact members by stamped-out resilient tongue snapping behind shoulder in base or case
    • 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
    • H01R13/719—Structural association with built-in electrical component specially adapted for high frequency, e.g. with filters
    • H01R13/7193—Structural association with built-in electrical component specially adapted for high frequency, e.g. with filters with ferrite filters
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R2103/00—Two poles
    • 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

  • Plug connection for airbag ignition systems having an airbag igniter housing and an airbag plug, having a contact carrier in which two contact elements and one current-carrying cable each attached to the contact elements is arranged, the contact carrier at least is partially provided with a surrounding housing that is produced by means of an overmolding, overmolding material.
  • plug connections are used in a wide variety of configurations and variants.
  • Plug connection solutions are available in a large number of different designs, for example with regard to the number of poles, electrical power and the conditioning of a wide variety of external influences such as moisture, temperature, corrosive media or mechanical loads.
  • IP International Protection
  • Connectors in particular for the realization of different types of protection or IP codes, iP classes, are in many cases enclosed, housed, partially or completely sealed or also shielded by housings. Other requirements such as sealing of the contacting elements, strain relief for the attached electrically conductive cables and lines, multiple contacts in a confined space, etc. can result in further special requirements for contact carriers.
  • the airbag connector must transmit a triggering signal to the airbag igniter with absolute reliability, and on the other hand, electrical interference signals that are triggered due to voltage peaks in the vehicle electronics, for example, must not trigger unintentional ignition of the airbag.
  • Connectors that are designed for use in airbag ignition systems must be compact and space-saving, since there is very little space when they are used in the steering wheel of a motor vehicle. Furthermore, these plug connectors must provide space inside for filters that are intended to prevent electromagnetic interference from leading to an unintentional triggering of the ignition system, for example ferrite cores, so-called ferrite core chokes.
  • filters that are intended to prevent electromagnetic interference from leading to an unintentional triggering of the ignition system, for example ferrite cores, so-called ferrite core chokes.
  • connectors for contacting airbag ignition systems should be easy to wire in order to make the installation of an airbag restraint system as easy as possible.
  • the connector housing consists of two shells, the plug contact and the filter as well as connecting pins for the supply cable being arranged in the lower shell and the supply cable having its ends soldered or welded to the connecting pins.
  • DE 101 46430 A1 discloses an electrical airbag connector with a four-part housing in which two angled electrical socket contacts and an electrical ground line are arranged. A single socket contact and the ground line are each electrically connected to a cable within the airbag connector via soldered and/or crimped connections.
  • a ferrite core choke is in an electrically conductive connection with one of the two socket contacts and the ground line. This electrically conductive connection is made via a soldered connection between a respective line element of the relevant socket contact or the ground line and a respective line end of a coil of the ferrite core choke.
  • the Socket contacts are already angled after they have been manufactured, so that they can also be installed in an angled state.
  • a connector for airbag applications is known from DE 42 17205 A1, which is wired to a flat conductor strip and in which the individual conductor tracks are pierced by contact pins and the electrical contact is ensured by the application of solder.
  • the work step of applying solder is not only cumbersome, but also makes the assembly quality and contacting reliability more prone to errors, since the solder work has to be done on the half-finished connector.
  • a medium-tight outlet of the cable, outgoing from the ignition system, igniter has a particularly high value for contacting tasks of airbag ignition systems, since moisture loads are to be expected at all times when used in vehicles.
  • Such sleeves made of elastic material are not suitable for cable outlets from electrical coupling elements, which are sealed for a particularly high degree of tightness with a sealing compound applied in a hot state and in liquid form under high pressure.
  • sealing compounds are, for example, thermoplastics that are sprayed on in a liquid state under high pressure.
  • DE 10 2004 061 663 B3 proposes to improve the sealing effect of the cable outlet while at the same time ensuring a reliable electrical contacting function of connectors with a rigid outer housing that a sleeve made of elastic material used as a seal between a cable outlet and the receiving opening for the cable of a contact carrier is only then required , if this sleeve is to have the function of an automatic seal.
  • the elasticity of the material of such a sleeve serves to ensure that the sleeve can press against the cable circumference on the one hand and on the inner lateral surface of the cylindrical receiving bore of the contact carrier under elastic tension on the other hand.
  • the sleeve does not have to have or produce an independent sealing effect.
  • the tightness of the cable outlet is created exclusively by the sealing material.
  • the only task of the sleeve here is to reliably prevent the sealing material applied in liquid form under high pressure from penetrating into the contact spaces of the coupling element.
  • the teaching of DE 102004061 663 B3 recognizes that in the case of cable outlets in rigid contact carriers, the seal can be achieved solely by an injected, elastic sealing material and a rigid sleeve prevents the injected sealing material from spreading into the contacting area.
  • This is achieved by forming the sleeve from a substantially incompressible material. With such an incompressible material, the sleeve can no longer be pushed into the receiving opening while being pressed and overlapped, as is the case with an embodiment made of elastic material, but a type of sliding fit is to be provided for the bearing.
  • This fit is to be designed in such a way that the sleeve can be pushed into the receiving opening of the coupling element with as little play as possible with practically no force.
  • the object of the invention is to further develop detachable electrically conductive connections for airbag applications and airbag ignition system contacts in vehicles in such a way that their media-tight structure is improved , manufacture and assembly are simplified and the disadvantages occurring in the prior art are at least partially reduced.
  • the invention recognizes that an arrangement formed from the contact element, the contact carrier, the cable with a surrounding housing produced by overmoulding of these components with simultaneous mechanical fixation within the surrounding housing can create a particularly media-tight composite of the detachable, electrically conductive contact.
  • a contact carrier with the contact element accommodated therein is partially or completely encapsulated on the outside of the contact carrier; the invention understands this to be largely completely encapsulated.
  • the contact carrier has a cable outlet sealed with a soft sealing element and an optional ferrite core, ferrite core choke.
  • the invention supports the mechanical, form-fitting and/or cohesive connection of the contact element(s) within the contact carrier and optionally the soft element seal and/or the ferrite core choke by means of a mechanical undercut, groove on the inside of the contact carrier, into which the encapsulation material can flow.
  • the encapsulation material can produce a form-fitting and/or material-locking connection within the mechanical undercut, groove and bring about the mechanical fixation.
  • a preassembled unit is provided in which the contact element or elements, the soft element seal and the optional ferrite core choke are inserted into the contact carrier.
  • the ferrite core choke closes the contact carrier on the cable entry side of the contact carrier at the front, so that the penetration of overmolding material into the contact chamber is prevented.
  • an end cap can take on this function.
  • the invention provides that a mechanical stop in the form of a mechanical undercut formed, for example, by a groove, a concentric annular shoulder or an axial stop for the contact elements ensures fixation during overmolding.
  • the preassembled unit is then overmoulded in such a way that the largely complete encapsulation with the overmoulding material is realized, with the overmoulding material being left open on the end face of the contact carrier in order to have the contact element accessible for the contacting task.
  • the cable or cables, electrical lines on the side and behind the cable outlet of the contact carrier are also encapsulated with the encapsulation material.
  • the annular gap between the contact carrier and the ferrite core choke or end cap is selected to be large enough for the overmolding material to penetrate at least partially.
  • the materials of the contact carrier and the encapsulation material are matched to one another in such a way that a media-tight bond results.
  • the surrounding housing represents the outer shell of the airbag connector, within the overmoulding, i. H.
  • the preassembled unit is located within the casing produced by the overmoulding. In this way, a medium-tight composite is formed, consisting of one or more contact elements, soft element seal,
  • the invention provides for the direct functional integration of the sealing function into the encapsulation, in that the encapsulation material has elastic and seal-like properties, optionally supplemented by the geometric design of the outer contour of the encapsulation.
  • a suitable geometry is, for example, a sealing lip, a sealing collar or a bead.
  • An alternative, non-integrated sealing function in the encapsulation is also possible, for example by a separate O-ring, a sealing cord or a seal, for which the encapsulation can then have a suitable geometry on its outer surface, for example a groove, a concentric annular shoulder or a Unit volume.
  • the soft sealing element can have compressible properties, which materials from the silicone group offer, for example.
  • the contact element can be formed from a contact box with a latching lance.
  • the encapsulation, which forms the housing, is made of a durable plastic that must be processable in the injection molding process. Thermoplastic elastomers, for example, are suitable. If the encapsulation is to include the direct functional integration of the sealing function in addition to an airbag ignition system housing, the encapsulation material must have sealing properties. Silicone materials, for example, are then suitable.
  • Media in the context of the invention are understood to mean influences occurring in the environment such as moisture, water, liquids, loose elements such as dust, dirt, sand, etc., gas and mixtures of the aforementioned media.
  • this plug-in connection formed in this way can be brought into contact by simply sliding it onto the contact pins of the airbag igniter system, the form practiced in the prior art the contacting by a direct welding process of the stranded wire and the contact pins is replaced by a simple plugging, sliding on.
  • This is particularly advantageous because the direct welding process is very complex due to the different geometries of the elements to be welded (contact pin is round, stranded wire is a stranded bundle, stranded bundle) and requires accessibility to the welding point. Due to the possibility created of using contact elements in the form of one or more plug-in contact boxes on the connector side for contacting, the lines, current-carrying cables and thus the stranded wires are attached by crimping or welding before assembly.
  • Fig. 1 shows the representation of the plug connection for airbag ignition systems in a first
  • Fig. 2 shows the front and side view sectional view of the connector for
  • Airbag ignition systems in a second embodiment shows the 3D representation of the plug connection for airbag ignition systems in the second embodiment;
  • FIG 6 shows the 3D representation of the contact carrier from two viewing directions.
  • Figure 1 shows the plug-in connection for airbag ignition systems in a first embodiment, consisting of airbag igniter housing 100 and an airbag plug 1.
  • contact carrier 10 Within contact carrier 10 are contact element 2 with the line fixed to it via crimp connection 3, current-carrying cable 6, soft element seal 4 and optionally the ferrite core choke 5 arranged.
  • an overmold, overmold material 20 is applied over the entire circumference and also protrudes on the cable outlet side, so that the line, current-carrying cable 6 is also surrounded by the overmold material 20 in a cable section, as is the contact carrier 10 and/or the Ferrite core choke 5 covered at the front.
  • the annular gap between the contact carrier 10 and the ferrite core choke 5 is selected to be large enough for the encapsulation material 23 to penetrate at least partially.
  • a mechanical, positive and material connection of the contact carrier 10 with the elements preassembled as an assembly consisting of at least one contact box 2 with a cable attached to the contact box 2 via a crimp connection 3, current-carrying cable 6 and a soft element seal 4 and a Ferrite core choke 5 realized.
  • No encapsulation material 20 is provided on the end of the contact carrier 10 opposite the cable outlet, so that the contact carrier 10 and the contact element 2 are accessible and the plug contact pin(s) 102 of the airbag igniter can be inserted.
  • the encapsulation 20 encloses the contact carrier 10 completely and over the entire surface with the exception of the front access for the contact element 2.
  • the encapsulation 20 has at least one step 21, so that a contact shoulder for an O-ring 101 for sealing the airbag connector 1 with respect to the airbag igniter housing 100 is formed.
  • Figure 2 shows the front and side view sectional view of the airbag connector 1 for airbag ignition systems in a second embodiment.
  • a shoulder 21 works together with a locking lug 22 to seal the airbag connector 1 for airbag ignition systems against the airbag igniter housing 100, which is used here as an insertion opening for the Airbag connector 1 is designed to seal.
  • the encapsulation material 20 can be formed from a silicone material to improve the sealing function.
  • the contact element 2 of this exemplary embodiment has a square outer geometry. Round, polygon-like or multi-cornered outer geometries are also possible.
  • a latching lance 2' is provided for holding, fixing the contact element 2 within the contact carrier 10 for fixing against the insertion forces of the plug contact pin 102 and/or forces occurring when the contact carrier 10 is overmolded with overmolding material 20, which in the end position of the contact element 2 within the contact carrier 10 in a detent position in a form-fitting manner relative to a shoulder in the contact carrier 10 prevents axial displacement.
  • a bead wart can also bring about a positive-locking fixation.
  • FIG. 3 illustrates the airbag plug 1 for airbag ignition systems in the second embodiment in a 3D representation.
  • the outer geometry is cylindrical, rotationally symmetrical and has a conical area.
  • the two lines, current-carrying cables 6 can be implemented as separate lines, as shown. Alternatively, a twin line can also be used, in which the current conductors, cores have a first insulating jacket and are then again surrounded by a common insulating jacket.
  • Figure 4 shows the 3D partial representation of the airbag connector 1 for airbag ignition systems in the second embodiment with encapsulation 20 shown partially transparent.
  • Figure 5 shows the perspective view of the arrangement within the contact carrier 10, which in this exemplary embodiment is formed from two contact boxes 2, each with a line attached to the contact box 2 via a crimp connection 3, current-carrying cable 6 and a soft element seal 4 and a ferrite core choke 5
  • This module is first pre-assembled and then inserted into the contact carrier 10.
  • the contact carrier 10 is designed in two or more parts, so that the pre-assembled module is first inserted into a part of the contact carrier 10, then the contact carrier 10 is completed and closed by the second and possibly further housing elements.
  • the two contact boxes 2 are gold-plated, so that improved electrical contacting with reduced resistance takes place.
  • FIG. 6 shows the 3D representation of the contact carrier 10 from two viewing directions.
  • the contact carrier area with the square outer geometry essentially encloses the contact elements 2 with the crimp connection 3, the contact carrier area with the oval outer geometry essentially encloses the soft element seal 4 and the ferrite core choke 5.
  • the transition area between square outer geometry and oval outer geometry forms an axial one on the inside Contact shoulder for the soft element seal 4.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Air Bags (AREA)

Abstract

L'invention concerne une connexion par enfichage pour des systèmes d'amorçage de coussins gonflables, comprenant un boîtier d'amorceur de coussin gonflable et une fiche de coussin gonflable, comprenant un support de contact, dans lequel sont disposés deux éléments de contact et respectivement une ligne électrique fixée aux éléments de contact, un câble électroconducteur, le support de contact étant pourvu, au moins par endroits, d'un boîtier englobant qui est réalisé au moyen d'un surmoulage, d'un matériau d'injection par surmoulage, le boîtier englobant présentant un contour destiné au verrouillage mécanique avec un contour d'encliquetage du boîtier d'amorceur et simutanément une fonction d'étanchéité.
EP22725758.1A 2021-04-27 2022-04-26 Connecteur pour systèmes d'amorçage de coussins gonflables Pending EP4331061A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021110681.8A DE102021110681B3 (de) 2021-04-27 2021-04-27 Steckverbindung für Airbag-Zündsysteme
PCT/EP2022/061005 WO2022229156A1 (fr) 2021-04-27 2022-04-26 Connecteur pour systèmes d'amorçage de coussins gonflables

Publications (1)

Publication Number Publication Date
EP4331061A1 true EP4331061A1 (fr) 2024-03-06

Family

ID=81850397

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22725758.1A Pending EP4331061A1 (fr) 2021-04-27 2022-04-26 Connecteur pour systèmes d'amorçage de coussins gonflables

Country Status (3)

Country Link
EP (1) EP4331061A1 (fr)
DE (1) DE102021110681B3 (fr)
WO (1) WO2022229156A1 (fr)

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE431590B (sv) * 1979-09-03 1984-02-13 Bofors Ab Kontaktdon med hogfrekvensfilter till en elektrisk tendare
DE4217205C2 (de) 1992-05-23 1994-09-08 Amphenol Tuchel Elect Steckverbinder
DE19859417A1 (de) 1998-12-22 2000-07-20 Taller Gmbh Sensor-Kupplung
DE19945303B4 (de) 1999-01-08 2011-09-15 Orica Explosives Technology Pty. Ltd. Auslöseeinheit zur Initiierung pyrotechnischer Elemente mit zweiteiliger Kapsel
DE20004565U1 (de) * 2000-03-11 2000-06-08 DBT Automation GmbH, 44534 Lünen Kabelstecker für die elektrische Kabelverbindung im Untertagebergbau
DE10146430B4 (de) 2001-09-20 2006-05-04 Fci Steckverbinder für Airbagsysteme
US6848930B2 (en) 2003-01-15 2005-02-01 Shimano, Inc. Electrical connector with resilient retaining ring to restrict radial expansion
DE102004061663B3 (de) 2004-12-22 2006-06-14 Gessmann Gmbh & Co. Kg Elektrisches Kupplungselement
JP2006179377A (ja) * 2004-12-24 2006-07-06 Fci Asia Technology Pte Ltd 電気信管点火装置用コネクタ
EP1775799B1 (fr) * 2005-08-12 2008-04-09 AMPHENOL-TUCHEL ELECTRONICS GmbH Connecteur pour applications pyrotechniques
WO2010026449A1 (fr) * 2008-09-04 2010-03-11 Fci Connecteur d’amorceur étanche
CN110603692A (zh) 2017-05-08 2019-12-20 莱尼电气系统有限公司 用于将插塞器装配在多芯的护套导线上的方法以及电的插塞器

Also Published As

Publication number Publication date
DE102021110681B3 (de) 2022-10-06
WO2022229156A1 (fr) 2022-11-03

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