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WO1999036293A1 - Dispositif d'amorçage pour un generateur de gaz - Google Patents

Dispositif d'amorçage pour un generateur de gaz Download PDF

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Publication number
WO1999036293A1
WO1999036293A1 PCT/EP1999/000297 EP9900297W WO9936293A1 WO 1999036293 A1 WO1999036293 A1 WO 1999036293A1 EP 9900297 W EP9900297 W EP 9900297W WO 9936293 A1 WO9936293 A1 WO 9936293A1
Authority
WO
WIPO (PCT)
Prior art keywords
ignition
ignition device
contact elements
housing
plug
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.)
Ceased
Application number
PCT/EP1999/000297
Other languages
German (de)
English (en)
Inventor
Hans-Peter Ruge
Manfred Veigl
Benno Köppl
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.)
Autoliv Development AB
Original Assignee
Autoliv Development AB
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 Autoliv Development AB filed Critical Autoliv Development AB
Priority to DE19980028T priority Critical patent/DE19980028B4/de
Publication of WO1999036293A1 publication Critical patent/WO1999036293A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • H01R13/66—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
    • H01R13/7036—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 the switch being in series with coupling part, e.g. dead coupling, explosion proof coupling
    • H01R13/7037—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 the switch being in series with coupling part, e.g. dead coupling, explosion proof coupling making use of a magnetically operated switch
    • 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
    • F42B3/10—Initiators therefor
    • F42B3/18—Safety initiators resistant to premature firing by static electricity or stray currents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
    • B60R2021/26029—Ignitors

Definitions

  • the present invention relates to an ignition device for a gas generator, in particular an airbag of a motor vehicle, with a housing for receiving a propellant, with an ignition unit which has an ignition charge and first contact elements connected to the ignition charge, and with a plug with second contact elements, which can be connected in an electrically conductive manner to the operation of the ignition device with the first contact elements.
  • DE 28 30 552 discloses a short-circuit protection for the contact elements of an ignition device, which is only canceled when the ignition device is connected to an ignition circuit when the connection of the contact elements to the corresponding poles of the connecting line has been established.
  • the short-circuit protection comprises contact springs which are in an electrically conductive connection with one another and before the ignition device is connected to the contact elements of the ignition device.
  • the contact elements protrude from the housing of the ignition device in such a way that the electrical connection between the ignition device and the connecting line is established before the short-circuit protection device is interrupted.
  • DE 44 29 175 discloses an electrical detonator in which the contact pins which are in electrical connection with the ignition charge are arranged at a defined distance from an annular pole element which surrounds the contact pins and is in electrically conductive connection with the housing of the detonator.
  • the distance between the annular pole element and the contact pins is aligned with an intended breakdown field strength.
  • the plug has at least one first pole element and that, at least when the plug is plugged in, a discharge path is provided between the first pole element and a second pole element, which is in electrically conductive connection with the vehicle ground. It is thereby achieved that the discharge path is not formed in the ignition device itself, but in the area of the plug, which means that the probability of an unintentional triggering of the ignition charge in the event of an arcing is effectively reduced both at high and at low voltage values.
  • a contact spring which can be electrically conductively connected to the first contact elements is provided as the second pole element.
  • Such Contact springs serve to form a short-circuit bridge between the contact elements when the ignition device is not connected.
  • the contact springs are removed from the contact elements and, according to the invention, can serve as second pole elements of the discharge path in this position.
  • the electrically conductive connection of the contact springs to the housing leads to a good shielding of the ignition device against electromagnetic radiation.
  • both pole elements have electrodes that taper to a point.
  • the peak effect that can be achieved in this way favors the charge equalization over the spark gap.
  • the first pole element has a projection which is electrically connected to the second contact elements and extends in the region of the second pole element through an opening in the jacket of the plug.
  • the distance between the projection and the second pole element can be adjusted by the dimension of the projection and by the thickness of the casing.
  • two projections are provided, each of which is electrically conductively connected to one of two second contact elements.
  • a holder is provided in the housing for fixing the ignition unit, said holder being in electrically conductive connection with the housing and with the second pole element. If a contact spring is provided as the second pole element, it is electrically conductively connected to the holder and, when the plug is not plugged in, to one or more first contact elements of the ignition device. If the plug is plugged in, between the correspondingly removed from the first contact element distant contact spring and the first pole element of the connector formed a spark gap. In this case, the overvoltage is derived by means of the contact spring, the holder and the housing which is electrically connected to the contact springs by the holder.
  • An electrical resistance connected to the first contact elements can be arranged in the primer charge.
  • the resistor can be in the form of fine metal wires or printed circuit boards. The current flow through the resistor leads to the generation of heat, which causes the ignition charge to ignite. If necessary, the current flow is brought about by trigger electronics, and undesired discharges can be avoided by the arrangement of the spark gap according to the invention.
  • an ignition housing which receives the ignition charge is provided and is electrically insulated from the housing of the ignition device. This avoids that a potential difference between the housing of the ignition device and the contact elements leads to a corresponding potential difference between the ignition housing and a trigger element, for example an electrical resistance.
  • the priming charge and the first contact elements connected to the priming charge are received in the housing of the ignition device.
  • Such an arrangement leads to a particularly effective shielding of the ignition unit against electromagnetic radiation.
  • the discharge path between the first and second pole elements can be realized by a spark gap with a defined length.
  • the discharge path can be realized by an electronic component, for example a diode or a varistor, with this Construction variant a more controllable discharge can be achieved in a spark gap compared to the sparkover.
  • the plug can have an additional third contact element which is in electrically conductive connection with the vehicle ground.
  • This third contact element can in turn be connectable to a fourth contact element, which is in electrically conductive connection with the housing of the gas generator, when the plug is inserted into the ignition unit.
  • FIG. 7 is a sectional view taken along line A-A in Fig. 5,
  • FIG. 11 is a sectional view along the line C-C in Fig. 10 and
  • FIG. 12 a further embodiment of an ignition device according to the invention according to FIG. 12 with a plug attached.
  • FIG. 1 and 2 show an ignition device according to the prior art in the non-connected (FIG. 1) and in the connected (FIG. 2) state.
  • the ignition device consists of the housing 10 in which the ignition unit 30 is arranged.
  • the ignition unit 30 comprises the ignition charge 32, the first contact elements 34 connected to the ignition charge, the electrical resistance 36 and the ignition housing 38 in which the ignition charge 32 is received.
  • the first contact elements 34 are in electrically conductive contact with the contact springs 50.
  • the contact springs 50 are received in the annular insulator 90.
  • the holder 80 arranged in the housing 10 serves to fix the ignition unit 30 in the housing 10.
  • the first contact elements 34 are in electrically conductive contact with the second contact elements 42 arranged in the plug 40.
  • the plugging in of the plug 40 results in the contact springs 50 being separated from the first contact elements 34 by the sheath 70.
  • the ignition unit 30, the first 34 and second contact elements 42 and the plug 40 are electrically insulated from the housing 10 of the ignition device, as a result of which a corresponding potential difference can be generated. If an electrostatic field approaches, an arc flashover can occur at the point with the lowest contact resistance. If in particular electrostatic charges of low voltage ( ⁇ 10 kV) are introduced, the Form spark gap in the area of the ignition unit 30, which leads to an undesired triggering of the ignition device.
  • FIG. 3 and FIG. 4 show an ignition device according to the invention, in which the arrangement of the housing 10, the ignition unit 30, the holder 80 and the insulator 90 corresponds to the arrangement according to FIGS. 1 and 2.
  • the contact springs 50 are electrically conductively connected to the holder 80 and thus to the housing 10.
  • the spark gap 100 is specifically arranged in an area that is not in the immediate vicinity of the ignition charge 32.
  • the spark gap 100 is created between the projection 60 serving as the first pole element, which is arranged in an electrically conductive manner on one of the second contact elements 42, and the contact spring 50 serving as the second pole element.
  • the projection 60 is through the recess 72 Sheath 70 of the connector 40 guided.
  • the spark gap 100 has the advantages that, on the one hand, a possible spark gap 100 is created not in the vicinity of the ignition unit 30, but in the area of the plug 40, and on the other hand the electrically conductive connection of the housing 10 to the contact spring 50 good shielding of the ignition device against electromagnetic radiation.
  • the spark gap 100 can be formed on one side according to FIG. 4 or on both sides.
  • the projection 60 is designed as a tapered electrode, which greatly promotes charge equalization.
  • the material of the projection 60 and the contact spring 50 is advantageously made of robust, conductive material which also enables multiple discharges without significant erosion.
  • FIG 5 and 6 show a further embodiment of the ignition device according to the invention, in which the ignition charge 32 is received in the ignition housing 38, which is electrically insulated from the housing 10 of the ignition device.
  • This has the advantage that a potential difference between the housing 10 and first contact elements 34 do not also require a corresponding potential difference between ignition housing 38 and ignition charge 32.
  • the propellant 20 is arranged in the housing 10.
  • the contact springs 50 are accommodated in the holder 90 and connected to the housing 10 in an electrically conductive manner.
  • the ignition unit 30 comprises an electrical resistor 36 for igniting the ignition charge 32, which is arranged in the end region of the first contact elements 34.
  • the plug 40 comprises two second contact elements 42, one of the contact elements 42 being in electrically conductive connection with the projection 60.
  • the projection 60 is guided through the recess 72 in the casing 70 of the plug 40.
  • the desired spark gap 100 is created, which permits safe discharge outside the area of the ignition charge 32.
  • FIG. 7 shows a sectional view along line A-A in FIG. 5 and illustrates the arrangement of the contact springs 50, which are electrically conductively connected to the first contact elements 34 when the plug is not attached.
  • the contact springs 50 are arranged on a ring which is received in the holder 90.
  • FIG 8 illustrates the arrangement of the projection 60, which is provided on one of the second contact elements 42 of the plug 40.
  • the projection 60 extends in the opening 72 of the casing 70 of the plug 40.
  • FIGS. 3 and 4 show a further ignition device according to the invention, in which the arrangement of the housing 10, the ignition unit 30, the holder 80 and the insulator 90 corresponds to the arrangement according to FIGS. 3 and 4.
  • a spark gap 100 is created between two first pole elements 60 and a third pole element 130. create.
  • the pole element 130 likewise consists of a tapered electrode, as can be seen in particular from FIG. 11.
  • the spark gaps 100 are arranged in an area that is not in the immediate vicinity of the ignition charge 32.
  • the projection 130 serving as the third pole element is, as shown in FIGS. 9 to 11, on the one hand electrically connected to the holder 80 made of metal via the connection 132 and on the other hand to the vehicle mass (GND). As can be seen in FIG.
  • recesses 104 are provided in the insulator 90, which go as far as the electrically conductive connecting elements between the contact springs 50 and the electrically conductive holder 80, so that here, as in the inserted state of the plug 40 (FIG 10), an electrical conductor, which is connected to the vehicle ground, can be connected to the contact springs 50 and the holder 80.
  • the embodiment according to FIG. 12 essentially corresponds to the embodiment according to FIG. 10.
  • the spark gap 100 is replaced by electronic components, in the present case by diodes 120.
  • the discharge can be controlled even better compared to the formation of a spark gap.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)

Abstract

L'invention concerne un dispositif d'amorçage pour un générateur de gaz, notamment d'un airbag de véhicule à moteur. Ce dispositif comprend un boîtier (10), servant à loger un agent propulseur (20), ainsi qu'une unité d'amorçage (30), présentant une charge d'amorçage (32) et des premiers éléments de contact (34) reliés à cette dernière. Ce dispositif comprend également un connecteur (40) présentant des deuxièmes éléments de contact (42) qui peuvent être raccordés de façon électroconductrice avec les premiers éléments de contact (34) pour faire fonctionner le dispositif d'amorçage. L'invention vise à réduire la probabilité d'un déclenchement indésirable de la charge d'amorçage lors d'une décharge électrostatique. A cet effet, le connecteur (40) présente au moins un premier élément polaire (60), et il est prévu, au moins lorsque le connecteur est enfiché, un trajet de décharge entre le premier élément polaire et un deuxième élément polaire connecté de façon électroconductrice à la masse du véhicule.
PCT/EP1999/000297 1998-01-19 1999-01-19 Dispositif d'amorçage pour un generateur de gaz Ceased WO1999036293A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19980028T DE19980028B4 (de) 1998-01-19 1999-01-19 Zündvorrichtung für einen Gasgenerator

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19801772A DE19801772C1 (de) 1998-01-19 1998-01-19 Zündvorrichtung für einen Gasgenerator
DE19801772.3 1998-01-19

Publications (1)

Publication Number Publication Date
WO1999036293A1 true WO1999036293A1 (fr) 1999-07-22

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1999/000297 Ceased WO1999036293A1 (fr) 1998-01-19 1999-01-19 Dispositif d'amorçage pour un generateur de gaz

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Country Link
DE (2) DE19801772C1 (fr)
WO (1) WO1999036293A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6435894B2 (en) 1998-07-15 2002-08-20 Tyco Electronics Logistics Ag Connector for airbag gas generator
EP1672748A1 (fr) * 2004-12-15 2006-06-21 AMPHENOL-TUCHEL ELECTRONICS GmbH Contact verrouillable pour un connecteur avec une protection contre des perturbations
EP1689047A1 (fr) * 2005-02-02 2006-08-09 AMPHENOL-TUCHEL ELECTRONICS GmbH Contact de sécurité pour connecteur avec un pont de court-circuit avec élément de commutation intégral
EP1689048A1 (fr) * 2005-02-02 2006-08-09 AMPHENOL-TUCHEL ELECTRONICS GmbH Dispositif de protection d'un connecteur électrique pour des jeux de conducteurs
WO2021039328A1 (fr) * 2019-08-30 2021-03-04 株式会社ダイセル Structure de maintien d'allumeur

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10139636C1 (de) * 2001-08-11 2003-04-10 Preh Elektro Feinmechanik Meßeinrichtung
FR2834134B1 (fr) * 2001-12-21 2004-04-02 Peugeot Citroen Automobiles Sa Dispositif de protection contre des decharges electrostatiques d'un appareil electrique, tel qu'un allumeur pyrotechnique pour sac gonflable de vehicule automobile
DE10348382A1 (de) * 2003-10-17 2005-05-25 Daimlerchrysler Ag Gasgenerator mit Ladungsableitstrecke
DE102007031690B4 (de) * 2007-07-06 2009-06-18 Electrovac Ag Metall/Fixiermaterial-Sockel für Zündvorrichtungen von Airbags oder dergleichen Personenschutzeinrichtungen sowie Zündvorrichtung mit einem derartigen Sockel
DE102008052399B4 (de) * 2008-10-21 2020-03-05 Trw Airbag Systems Gmbh Gasgenerator für eine Sicherheitseinrichtung in einem Fahrzeug
DE102008054675A1 (de) * 2008-12-15 2010-06-24 Tyco Electronics Amp Gmbh Elektrischer Steckverbinder sowie Verfahren zum Montieren eines elektrischen Kabels im elektrischen Steckverbinder
JP6706190B2 (ja) 2016-11-29 2020-06-03 株式会社ダイセル ガス発生器
FR3102314B1 (fr) * 2019-10-22 2023-05-12 Aptiv Tech Ltd Ensemble de connexion pour dispositif de sécurité passive, protégé contre les décharges électrostatiques

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2025711A (en) * 1978-07-12 1980-01-23 Daimler Benz Ag Protection arrangement for an electric igniter
JPS56153653A (en) * 1980-04-30 1981-11-27 Matsushita Electronics Corp Cathode-ray tube device
US4358135A (en) * 1979-11-02 1982-11-09 Nippon Soken, Inc. Connector for igniting circuit of priming device
EP0269475A1 (fr) * 1986-10-27 1988-06-01 Societe Europeenne De Propulsion (S.E.P.) S.A. Protection d'un dispositif électro-pyrotechnique vis-à-vis des décharges électrostatiques
EP0547443A1 (fr) * 1991-12-10 1993-06-23 TRW Occupant Restraint Systems GmbH Connecteur électrique sur un générateur de gaz pyrotechnique à allumeur électrique
DE4429175A1 (de) 1993-08-25 1995-03-02 Ems Patvag Ag Gekapselter elektrischer Zünder mit integriertem Überspannungsableiter für einen Gasgenerator
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

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2025711A (en) * 1978-07-12 1980-01-23 Daimler Benz Ag Protection arrangement for an electric igniter
DE2830552A1 (de) 1978-07-12 1980-01-24 Daimler Benz Ag Kurzschlussicherung fuer elektrische zuender
US4358135A (en) * 1979-11-02 1982-11-09 Nippon Soken, Inc. Connector for igniting circuit of priming device
JPS56153653A (en) * 1980-04-30 1981-11-27 Matsushita Electronics Corp Cathode-ray tube device
EP0269475A1 (fr) * 1986-10-27 1988-06-01 Societe Europeenne De Propulsion (S.E.P.) S.A. Protection d'un dispositif électro-pyrotechnique vis-à-vis des décharges électrostatiques
EP0547443A1 (fr) * 1991-12-10 1993-06-23 TRW Occupant Restraint Systems GmbH Connecteur électrique sur un générateur de gaz pyrotechnique à allumeur électrique
DE4429175A1 (de) 1993-08-25 1995-03-02 Ems Patvag Ag Gekapselter elektrischer Zünder mit integriertem Überspannungsableiter für einen Gasgenerator
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 006, no. 032 (E - 096) 26 February 1982 (1982-02-26) *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6435894B2 (en) 1998-07-15 2002-08-20 Tyco Electronics Logistics Ag Connector for airbag gas generator
EP1672748A1 (fr) * 2004-12-15 2006-06-21 AMPHENOL-TUCHEL ELECTRONICS GmbH Contact verrouillable pour un connecteur avec une protection contre des perturbations
US7249960B2 (en) 2004-12-15 2007-07-31 Amphenol-Tuchel Electronics Gmbh Contact safety device for pin-and-socket connectors with safety mechanism against interference
EP1689047A1 (fr) * 2005-02-02 2006-08-09 AMPHENOL-TUCHEL ELECTRONICS GmbH Contact de sécurité pour connecteur avec un pont de court-circuit avec élément de commutation intégral
EP1689048A1 (fr) * 2005-02-02 2006-08-09 AMPHENOL-TUCHEL ELECTRONICS GmbH Dispositif de protection d'un connecteur électrique pour des jeux de conducteurs
US7247039B2 (en) 2005-02-02 2007-07-24 Amphenol-Tuchel Electronics Gmbh Contact safety device for pin-and-socket connectors with a shorting bar with an integrated circuit element
WO2021039328A1 (fr) * 2019-08-30 2021-03-04 株式会社ダイセル Structure de maintien d'allumeur
JP2021037793A (ja) * 2019-08-30 2021-03-11 株式会社ダイセル 点火器保持構造
JP2023101583A (ja) * 2019-08-30 2023-07-21 株式会社ダイセル ガス発生器

Also Published As

Publication number Publication date
DE19801772C1 (de) 1999-04-22
DE19980028D2 (de) 2001-07-12
DE19980028B4 (de) 2008-02-28

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