EP1160533B1 - Initiateur électro-pyrotechnique à pont en couche mince et à très basse énergie de fonctionnement - Google Patents

Initiateur électro-pyrotechnique à pont en couche mince et à très basse énergie de fonctionnement Download PDF

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Publication number
EP1160533B1
EP1160533B1 EP01401108A EP01401108A EP1160533B1 EP 1160533 B1 EP1160533 B1 EP 1160533B1 EP 01401108 A EP01401108 A EP 01401108A EP 01401108 A EP01401108 A EP 01401108A EP 1160533 B1 EP1160533 B1 EP 1160533B1
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EP
European Patent Office
Prior art keywords
constituted
initiator according
support
electropyrotechnic initiator
electropyrotechnic
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.)
Expired - Lifetime
Application number
EP01401108A
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German (de)
English (en)
French (fr)
Other versions
EP1160533A1 (fr
Inventor
Jean-René Duguet
Jean-Pierré Vedel
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.)
Livbag SAS
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Livbag SAS
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Publication date
Application filed by Livbag SAS filed Critical Livbag SAS
Publication of EP1160533A1 publication Critical patent/EP1160533A1/fr
Application granted granted Critical
Publication of EP1160533B1 publication Critical patent/EP1160533B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F42B3/12—Bridge initiators
    • F42B3/13—Bridge initiators with semiconductive bridge

Definitions

  • the present invention relates to the field of electro-pyrotechnic initiators intended, in particular, to initiate occupant protection systems of a motor vehicle such as for example seat belt tensioners or generators gas to inflate protective cushions. More precisely the invention relates to an electro-pyrotechnic initiator whose resistive heating element is consisting of a thin layer bridge that works with very low energy.
  • electro-pyrotechnic initiators intended for automotive safety were constituted by an insulating body of electricity extended by a fragmentable metal cap and crossed by two electrodes.
  • the electrodes are linked together by a resistive suspended filament heater surrounded by an explosive composition initiation consisting of a primary explosive or a redox mixture as described for example in the US Patent 3,572,247.
  • Such initiators have however the disadvantage of being sensitive to vibrations of the motor vehicle at the welds of the resistive filament on the electrodes. These welds, when they are repeatedly requested by vehicle vibrations can break and make the inoperative initiator, which means that this technology is gradually being abandoned today.
  • the object of the present invention is precisely to propose such an initiator.
  • the invention therefore relates to an initiator electropyrotechnic according to claim 1.
  • Said electrical circuit and said support will be advantageously constituted by a component, "C.M.S.” mounted on the surface of the solid body.
  • Such components are still known by their abbreviated Anglo-Saxon appellation "S.M.D. (Surface Mounted Device).
  • wedge not electrically conductive and having two opposite flat faces is glued by one of its faces planes on the planar upper face of said massive body and the other flat face of the hold carries two layers separate conductive metals which are each at contact of one of the two electrodes and on which is fixed, by means of two conductive welds of electricity, the C.M.S.
  • said container and said massive body are held together by a non-overmolding conductor of electricity and which is crossed by two electrodes.
  • the support will consist of a material chosen from the group consisting of silica vitreous, mineral glasses containing silica, organic resins and plastics composites containing at least one organic resin and mineral fibers.
  • said support consists of a material chosen from the group made up of mineral glasses containing silica.
  • the different primary explosives suitable for the condition of grain size expressed above are likely to be used but we prefer, for reasons of operating reliability, use the salts of dinitrobenzofuroxane and in particular the rubidium salt of dinitrobenzofuroxane (RbDNBF) and the potassium salt of dinitrobenzofuroxan (KDNBF).
  • the binder of the priming composition will advantageously be constituted with vinyl or acrylic resin.
  • the said flat resistive element will be advantageously constituted by tantalum nitride.
  • Figure 1 is an axial sectional view of a cylindrical initiator according to the invention.
  • Figure 2 is a top view of the circuit electric by thin film deposition used in the initiator shown in Figure 1.
  • Figure 3 is a partial sectional view of the massive body carrying the wedge and the C.M.S. such used in the initiator shown in Figure 1.
  • FIG. 1 An electro-pyrotechnic initiator 1 according to the invention is shown in Figure 1.
  • This initiator 1 consists of a cylindrical container 2 fragmentable open at one of its ends.
  • a body massive cylindrical 3 closes the open end of the container 2.
  • the side wall 4 of the body 3 has a external shoulder 5 on which the end is supported container 2 open.
  • container 2 and body 3 are enclosed in an overmolding 6 which holds them in solidarity with each other.
  • Container 2 thus has the shape of a cylindrical cap having a wall side 7 and a flat upper wall 8.
  • the container 2 is advantageously constituted by a thin light metal like aluminum and its flat wall 8 is advantageously weakened to be able to open easily due to increased pressure prevailing inside the container.
  • Overmolding 6 is preferably made in a resin thermoplastic such as, for example, terephthalate polyethylene.
  • Body 3 must be able to function as a wall impervious to detonation and combustion gases resulting from this detonation.
  • This body 3 is preferably made of a dense metal such as steel.
  • the body 3 has a flat upper face 9 and a lower face 15 also flat and it encloses over its entire height h, a hollow glass tube 10.
  • Two electrodes 12, 13 in the form of a cylindrical pin pass through the body 3, the electrode 12 passing through it through the hollow glass tube 10.
  • Each electrode has one end that protrudes the planar upper face 9 of the body 3 and one end which exceeds the lower face 14 of the overmolding 6.
  • an insulating block 16 On the planar upper face 9 of the body 3 is fixed, by example by gluing, an insulating block 16 which is located thus arranged inside the container 2.
  • Wedge 16 is based on charged polyepoxy resin of glass fibers and has the shape of a disc comprising two cylindrical channels intended to allow passage, at during the assembly of initiator 1, the electrodes 12 and 13.
  • the wedge 16 carries on its upper face two plies distinct and non-contiguous metals of copper 21 and 22; the upper ends of electrodes 12 and 13 are each connected to one of the layers 21 and 22 at welds 27 and 28 made of an alloy conductor of electricity.
  • a SMD component constituted by a support 26 in the form of a parallelepiped chip, the upper face of which carries an electrical circuit 18.
  • the support 26 consists of an ordinary "flint" glass containing between 20% and 55% silica SiO 2 . Such a glass is an excellent electrical insulator and a very poor conductor of heat, its thermal conductivity being of the order of 6mW / cm ° C.
  • the circuit 18 consists of a deposit 29 in a thin layer of tantalum nitride partially covered by deposits in thin layers 30 and 31 of conductive metals based on gold and palladium. As shown in FIG.
  • the deposits 29, 30 and 31 have trapezoidal shapes which leave uncovered a central parallelepipedal zone 17 of the deposit 29 made of tantalum nitride.
  • This zone 17 constitutes the resistive heating element in a thin layer of the electrical circuit 18.
  • a tin solder 32 encloses one of the ends of the support 26 so as to ensure an electrical connection between the conductive deposit 30 and the conductive sheet 22 while a separate solder 33 also made of tin encloses the opposite end of the support 26 so as to ensure an electrical connection between the conductive deposit 31 and the conductive sheet 21.
  • the electrical circuit 18 comprising the resistive heating element 17 is covered by a pyrotechnic initiation composition 23 constituted for 80% of its weight by the rubidium salt of dinitrobenzofuroxane and for 20% of its weight by an epoxy resin acting as a binder .
  • the particle size of the primary explosive RbDNBF was close to 20 ⁇ 10 -6 m.
  • Container 2 also contains a powder 25 consisting of, for example, a baking powder nitrocellulose base or by a mixture of boron and potassium nitrate.
  • Such an initiator is particularly simple and economical to mass produce.
  • the wedge 16 thus fitted is glued to the flat upper face 9 of the solid body 3 so as to constitute a head of initiation which is covered by the composition priming 23 before introducing it into container 2 containing the ignition powder 25. It then suffices to joining together thanks to overmolding 6.
  • the initiators according to the invention can operate reliably with a very low energy, of the order of 100 to 200 micro-joules or even from 1x10 -4 to 2x10 -4 J, and, when their constituent elements and in particular the resistor element 17 are well dimensioned, they have current values of any fire close to 1200mA and non-fire current values greater than 500mA. Furthermore, the initiators with thin film deposits being very resistant to vibrations, the initiators according to the invention find a preferred application in the field of protection, by electro-pyrotechnic devices, of the occupants of a motor vehicle.
  • Initiator No. 1 corresponds to a thick layer bridge initiator, on a non-heat conducting support and with a priming composition using an oxidation-reduction mixture.
  • Initiator No. 2 corresponds to a thick layer bridge initiator, on a non-heat conducting support and with a priming composition using a primary explosive.
  • Initiator # 3 is a thin layer bridge initiator on a heat conducting support with a priming composition using a primary explosive

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)
  • Surface Heating Bodies (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
  • Conductive Materials (AREA)
  • Automotive Seat Belt Assembly (AREA)
EP01401108A 2000-05-30 2001-04-27 Initiateur électro-pyrotechnique à pont en couche mince et à très basse énergie de fonctionnement Expired - Lifetime EP1160533B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0006926A FR2809806B1 (fr) 2000-05-30 2000-05-30 Initiateur electro-pyrotechnique a pont en couche mince et a tres basse energie de fonctionnement
FR0006926 2000-05-30

Publications (2)

Publication Number Publication Date
EP1160533A1 EP1160533A1 (fr) 2001-12-05
EP1160533B1 true EP1160533B1 (fr) 2004-10-20

Family

ID=8850787

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01401108A Expired - Lifetime EP1160533B1 (fr) 2000-05-30 2001-04-27 Initiateur électro-pyrotechnique à pont en couche mince et à très basse énergie de fonctionnement

Country Status (10)

Country Link
US (1) US6640718B2 (pt)
EP (1) EP1160533B1 (pt)
JP (1) JP2002013900A (pt)
KR (1) KR20010110110A (pt)
CN (1) CN1326878A (pt)
AT (1) ATE280382T1 (pt)
BR (1) BR0102151A (pt)
DE (1) DE60106519T2 (pt)
ES (1) ES2228766T3 (pt)
FR (1) FR2809806B1 (pt)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8096242B2 (en) 2006-10-26 2012-01-17 Nipponkayaku Kabushikikaisha Squib, gas generator for air bag and gas generator for seat belt pretensioner
US9248802B2 (en) 2012-11-29 2016-02-02 Autoliv Asp, Inc. Surface mount initiators

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10123284A1 (de) 2001-05-12 2002-11-14 Conti Temic Microelectronic Pyrotechnische Zündeinrichtung mit integrierter Elektronikbaugruppe
DE10123285A1 (de) * 2001-05-12 2002-11-14 Conti Temic Microelectronic Zündelement für pyrotechnische Wirkmassen auf einer Schaltungsträgeranordnung mit einer Zündelektronikbaugruppe
DE10123282A1 (de) 2001-05-12 2002-11-14 Conti Temic Microelectronic Pyrotechnische Zündeinrichtung mit integrierter Elektronikbaugruppe
US20030192446A1 (en) * 2002-04-16 2003-10-16 Paul Berg Header with overlying eyelet
US20040244624A1 (en) * 2003-01-31 2004-12-09 Hiroshi Harada Parts of igniter
DE10308443A1 (de) * 2003-02-27 2004-09-09 Dynltec Gmbh Elektrischer Detonator
US20040226473A1 (en) * 2003-05-13 2004-11-18 David Davison Inert initiator and explosive device
DE20307603U1 (de) * 2003-05-15 2003-09-25 TRW Airbag Systems GmbH, 84544 Aschau Anzünder zur Verwendung in einer Schutzvorrichtung für Fahrzeuginsassen
US8020490B1 (en) 2003-07-24 2011-09-20 University Of South Florida Method of fabricating MEMS-based micro detonators
US20060208474A1 (en) * 2003-12-24 2006-09-21 Nippon Kayaku Kabushiki Kaisha Gas producer
EP1726357A4 (en) * 2004-03-02 2013-03-06 Nippon Kayaku Kk GAS GENERATOR
US20060260498A1 (en) * 2005-04-05 2006-11-23 Daicel Chemical Industries, Ltd. Igniter assembly
US7571679B2 (en) * 2006-09-29 2009-08-11 Reynolds Systems, Inc. Energetic material initiation device having integrated low-energy exploding foil initiator header
US8408131B1 (en) 2006-09-29 2013-04-02 Reynolds Systems, Inc. Energetic material initiation device
JP4653718B2 (ja) * 2006-10-26 2011-03-16 日本化薬株式会社 スクイブならびにエアバッグ用ガス発生装置およびシートベルトプリテンショナー用ガス発生装置
US8276516B1 (en) 2008-10-30 2012-10-02 Reynolds Systems, Inc. Apparatus for detonating a triaminotrinitrobenzene charge
CN103017197B (zh) * 2011-09-23 2014-10-01 中国电子科技集团公司第四十八研究所 一种无引线封装薄膜桥发火器的制造方法
CN102384486A (zh) * 2011-09-23 2012-03-21 中国电子科技集团公司第四十八研究所 一种低发火电压的Ni-Cr合金薄膜桥点火器及其制备方法
DE102012004966B3 (de) * 2012-03-14 2013-01-03 A&O Technologie GmbH Zündsockel für pyroelektrische Zündvorrichtungen
CN102927590A (zh) * 2012-10-26 2013-02-13 中国电子科技集团公司第四十八研究所 一种金属薄膜桥点火器及其制备方法
US8934214B2 (en) * 2013-04-09 2015-01-13 Halliburton Energy Services, Inc. Plasma gap detonator with novel initiation scheme
GB201601073D0 (en) 2016-01-20 2016-03-02 Ucb Biopharma Sprl Antibodies
GB201601075D0 (en) 2016-01-20 2016-03-02 Ucb Biopharma Sprl Antibodies molecules
GB201601077D0 (en) 2016-01-20 2016-03-02 Ucb Biopharma Sprl Antibody molecule
CN105423340B (zh) * 2015-11-30 2018-07-06 中国电子科技集团公司第四十八研究所 一体化薄膜桥点火器及其制备方法
RU201815U1 (ru) * 2020-10-15 2021-01-13 Общество с ограниченной ответственностью Научно-производственная компания "Рэлсиб" (ООО НПК "Рэлсиб") Планарная структура инициирующего устройства
FR3135320B1 (fr) 2022-05-03 2024-03-22 Ncs Pyrotechnie Et Tech Sas Allumeur à performance réduite et pastilles thermiques

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US3572247A (en) 1968-08-29 1971-03-23 Theodore Warshall Protective rf attenuator plug for wire-bridge detonators
US4729315A (en) 1986-12-17 1988-03-08 Quantic Industries, Inc. Thin film bridge initiator and method therefor
US5254838A (en) * 1987-09-14 1993-10-19 Nippon Koki Co., Ltd. Igniter for electric ignition systems
US5140906A (en) * 1991-11-05 1992-08-25 Ici Americas, Inc. Airbag igniter having double glass seal
FR2693721B1 (fr) * 1992-07-20 1994-10-21 Ncs Pyrotechnie Technologies Charge d'amorçage à percussion annulaire et son procédé de fabrication.
US5912427A (en) * 1993-02-26 1999-06-15 Quantic Industries, Inc. Semiconductor bridge explosive device
FR2704944B1 (fr) * 1993-05-05 1995-08-04 Ncs Pyrotechnie Technologies Initiateur électro-pyrotechnique.
JP2700100B2 (ja) * 1993-05-28 1998-01-19 日本工機株式会社 イグナイター
US5596163A (en) * 1993-08-25 1997-01-21 Ems-Patvag Ag Gas generator igniting capsule
FR2720493B1 (fr) * 1994-05-31 1996-07-19 Giat Ind Sa Initiateur pyrotechnique.
US5798476A (en) 1996-03-25 1998-08-25 Trw Inc. Initiator for an air bag inflator
US5932832A (en) * 1996-04-15 1999-08-03 Autoliv Asp, Inc. High pressure resistant initiator with integral metal oxide varistor for electro-static discharge protection
US5736668A (en) * 1996-05-28 1998-04-07 Trw Inc. Inflator for an inflatable vehicle occupant protection device
WO1998025100A1 (en) * 1996-12-05 1998-06-11 International Resistive Company, Inc. Ceramic substrate electric igniter with nitrided tantalum bridge
US6054760A (en) * 1996-12-23 2000-04-25 Scb Technologies Inc. Surface-connectable semiconductor bridge elements and devices including the same
DE19732380B4 (de) * 1997-07-25 2005-04-14 Conti Temic Microelectronic Gmbh Anzündelement für pyrotechnische Wirkmassen mit einer Dämmschicht
FR2781878B1 (fr) * 1998-07-31 2001-02-16 Giat Ind Sa Procede de mise en oeuvre d'une substance pyrotechnique et initiateur pyrotechnique obtenu avec un tel procede
FR2784176B1 (fr) * 1998-10-06 2004-11-26 Livbag Snc Systeme d'initiation electro-pyrotechnique protege contre les decharges electrostatiques
FR2790078B1 (fr) 1999-02-18 2004-11-26 Livbag Snc Allumeur electropyrotechnique a securite d'allumage renforcee
FR2800865B1 (fr) 1999-11-05 2001-12-07 Livbag Snc Initiateur pyrotechnique a filament photograve protege contre les decharges electrostatiques

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8096242B2 (en) 2006-10-26 2012-01-17 Nipponkayaku Kabushikikaisha Squib, gas generator for air bag and gas generator for seat belt pretensioner
US9248802B2 (en) 2012-11-29 2016-02-02 Autoliv Asp, Inc. Surface mount initiators

Also Published As

Publication number Publication date
FR2809806B1 (fr) 2003-01-10
EP1160533A1 (fr) 2001-12-05
CN1326878A (zh) 2001-12-19
US6640718B2 (en) 2003-11-04
KR20010110110A (ko) 2001-12-12
FR2809806A1 (fr) 2001-12-07
ES2228766T3 (es) 2005-04-16
US20020002924A1 (en) 2002-01-10
JP2002013900A (ja) 2002-01-18
DE60106519T2 (de) 2005-12-01
BR0102151A (pt) 2002-02-13
DE60106519D1 (de) 2004-11-25
ATE280382T1 (de) 2004-11-15

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