EP1139060B1 - Pyrotechnischer Zünder mit einem elektrischen oder elektronischen Bauelement und/oder mit einem Steckverbinder - Google Patents

Pyrotechnischer Zünder mit einem elektrischen oder elektronischen Bauelement und/oder mit einem Steckverbinder Download PDF

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Publication number
EP1139060B1
EP1139060B1 EP01400714A EP01400714A EP1139060B1 EP 1139060 B1 EP1139060 B1 EP 1139060B1 EP 01400714 A EP01400714 A EP 01400714A EP 01400714 A EP01400714 A EP 01400714A EP 1139060 B1 EP1139060 B1 EP 1139060B1
Authority
EP
European Patent Office
Prior art keywords
connector
base
cavity
pins
initiator
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
EP01400714A
Other languages
English (en)
French (fr)
Other versions
EP1139060A1 (de
Inventor
Jean-Paul Vidot
Patrice Chemière
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.)
Giat Industries SA
Original Assignee
Giat Industries SA
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
Priority claimed from FR0004085A external-priority patent/FR2807154B3/fr
Application filed by Giat Industries SA filed Critical Giat Industries SA
Publication of EP1139060A1 publication Critical patent/EP1139060A1/de
Application granted granted Critical
Publication of EP1139060B1 publication Critical patent/EP1139060B1/de
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
    • F42B3/195—Manufacture
    • 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
    • F42B3/182—Safety initiators resistant to premature firing by static electricity or stray currents having shunting means

Definitions

  • the field of the invention is that of the initiators pyrotechnics, i.e. components for transmit a pyrotechnic effect in a chain pyrotechnic.
  • pyrotechnics i.e. components for transmit a pyrotechnic effect in a chain pyrotechnic.
  • Such a pyrotechnic initiator is described in the document US5621183 (basis of claim 1).
  • These initiators are for example intended to come activate a pyromechanism or initiate a composition gas generator in a security system for the automobile.
  • These initiator boxes are generally made by injection or overmolding.
  • the initiators are connected by connections electric to a centralized electronic control circuit vehicle safety.
  • connections are generally formed by lugs deformable electrical devices or by connectors.
  • the installation of the terminals is long and tedious. he this results in an increase in the cost of carrying out the connectivity.
  • the known connectors are bulky axially and difficult to integrate into a vehicle.
  • the pods also present problems from the point of view the reliability of the connection and therefore the security of the vehicle.
  • a shunt means which makes it possible to avoid, in the absence connector, unexpected pyrotechnic initiations, by example by electrostatic discharge.
  • Such a shunt is a bulky intermediate component which comes between the pyrotechnic component and the connector and further complicates the connection often requiring the installation of adapters.
  • the initiator according to the invention allows with a reduced axial dimensions to simplify and make reliable the connection of the initiator to vehicle circuits.
  • the initiator according to the invention authorizes the establishment of a low-cost shunt circuit, for example at the time of manufacture of the initiator, and without resulting increase in axial dimensions or a complication of making connections.
  • the subject of the invention is a pyrotechnic initiator according to claim 1.
  • the cavity may in particular carry a shunt component ensuring, in the absence of a connector, a short circuit between the initiator pins.
  • the base may include means ensuring a axial immobilization of the shunt component and / or the connector in the cavity.
  • the cavity is cylindrical and has at least one notch intended for receive a projection integral with the shunt component and allowing its angular positioning.
  • the shunt component may consist of a strip flexible conductor secured to the base, lamella ensuring a short circuit between the pins in the absence of a connector.
  • the base can advantageously be molded onto the conductive coverslip.
  • the upper shell and the base can be returned secured to each other by ultrasonic welding.
  • an initiator pyrotechnic 1 according to a first embodiment of the invention comprises a pyrotechnic composition (not shown) arranged inside a housing 2 composed a substantially cylindrical case 4, made for example in metal and extended by two pins 7a, 7b.
  • a pyrotechnic composition (not shown) arranged inside a housing 2 composed a substantially cylindrical case 4, made for example in metal and extended by two pins 7a, 7b.
  • a substantially cylindrical case 4 made for example in metal and extended by two pins 7a, 7b.
  • This case 2 is arranged inside an envelope 3 formed by the joining of two parts: a base 16 and an upper shell 17.
  • the shell and the base are made by injection a plastic material, for example of the polyamide type or polycarbonate. They are made integral of one another for example by ultrasonic welding.
  • the base 16 has a bearing face 18 on which is made a circular groove 19 and it is crossed by two holes 20, 21 connected by a notch 22.
  • the holes 20 and 21 are intended to let the pins 7a and 7b of the housing 2.
  • the notch 22 allows receive the bends of pins 7a and 7b.
  • the upper shell 17 has a bearing face which has a circular toothing 27 intended to cooperate with the groove 19 of base 16.
  • the upper shell 17 defines a cylindrical volume internal 28 which is intended to receive the housing 2. This volume therefore has the same diameter as the outer diameter of the housing 2 and it has a height equal to that of the case.
  • the thickness e of the upper shell is of the order of 0.5 mm. This shell is thin enough to be able be broken by the initiation of the pyrotechnic composition contained in case 2.
  • the base 16 also includes a cavity 40 to the interior of which extend the pins 7a, 7b. This cavity with a parallelepiped profile and it is intended for receive a connector (not shown).
  • the base also includes an elastic spout 41 which deforms when a connector is inserted and which has an abutment surface 42 making it possible to prohibit the connector outlet out of cavity 40.
  • This spout is formed in one piece with the base 16.
  • the initiator according to the invention is assembled as follows.
  • Ultrasonic welding is carried out in a known manner by applying a sonotrode from a welding machine to a conical profile 31 of the upper shell 17.
  • the vibrations of the sonotrode cause the welding of surfaces in contact.
  • the circular toothing 27 penetrates the mounting in the groove 19 which allows to concentrate the stresses caused by ultrasonic vibrations during welding. We thus locate a warm-up at the level of groove / toothing contact which allows welding.
  • the tightness of the initiator with respect to the pyromechanism and relative to the gases generated during operation is provided by the support of the bottom 6 on the support face 18, the pressure which also has the effect of firmly applying the bottom and the case 4 on the support face which makes slightly penetrate the case 2 into the lower shell 16 and increases the seal.
  • the initiator according to the invention is therefore perfectly waterproof and can also receive reliably and waterproof a standard connector with rectangular section.
  • the connector being made integral with the initiator thanks to the spout 41 which will cooperate with a connector notch.
  • a electrical or electronic component such as a capacitor or a shunt.
  • the internal part of the initiator formed by the housing 2 may be the same whatever the external geometry of the complete component and that of the connector which will have to adapt to it.
  • Figure 3 thus shows a second embodiment an initiator according to the invention.
  • the cavity 40 is here cylindrical and it is delimited at its opening by a circular bead 43.
  • the cavity 40 is intended to receive a cylindrical component, for example a connector or a shunt component as will be described later.
  • the bead 43 has a stop surface 44.
  • a groove clearance circular 45 is arranged between the bead 43 and the internal cylindrical surface of the cavity 40.
  • the base 16 finally comprises two notches 46a, 46b cutting the bead 43 and extending from a lower face 47 of the base 16 to beyond the groove 45.
  • notches are intended to receive projections complementary to a connector or component shunt and allow angular positioning of the component or connector relative to the base 16.
  • FIG. 5 shows this same initiator comprising inside the cavity 40 a shunt component 48.
  • a known shunt component is formed by an insulating body 49 having a cylindrical external profile of the same diameter as the cavity 40 of the initiator 1, carrying two projections 50a and 50b intended to cooperate with the notches 46a and 46b of the base 16.
  • the bottom 51 of the body carries two holes 52a, 52b intended to receive pins 7a and 7b from the initiator.
  • the body 49 has a middle notch 53 which is delimited by the bottom 51 and two flat surfaces 54a and 54b.
  • the flat surface 54a has in the middle part a semi-cylindrical rib 55 while the flat surface 54b has a rectangular groove 56.
  • the rib and the groove are intended to cooperate with additional profiles carried by a connector so as to ensure that it is put in place with an orientation correct compared to component shunt 48.
  • the surfaces planes 54a and 54b will furthermore guide the connector.
  • the body 49 of the component 48 carries a notch 57 rectangular which is parallel to the surface 54a and which receives a conductive strip 58 (for example brass).
  • This strip is shown alone in FIG. 7c. It has two tabs 59a, 59b connected together by a bar 60. It is formed from a single piece of brass stamped and folded.
  • the tabs are folded so that when the strip 58 is placed in its notch 57, the ends of the tabs 59a, 59b are located respectively opposite the holes 52a, 52b.
  • the tongue 59b is shown in Figure 7a in its contact position with an initiator pin.
  • the tongue 59a is shown in its rest position, shunt component 48 outside the initiator.
  • the protective short circuit is therefore eliminated as soon as the introduction of the connector. It is however re-established as soon as removing the connector.
  • the level of security obtained with screw electrostatic discharge is optimal.
  • Figure 6 shows in perspective the shunt component 48 (conductive strip not shown) positioned in front the initiator 1 according to the invention and before its implementation in the cavity 40 thereof.
  • the dimensions of the cavity 40 have been defined so to be able to receive a standard shunt 48 component from trade.
  • This component is introduced into the cavity 40. It positions in abutment at the bottom of it. It is adjusted by tightly in the cavity so as to ensure its maintenance axial.
  • the axial size of the assembly is reduced to the maximum. Safety is ensured with extremely mounting simplified.
  • a standard connector 62 can then be connected to initiator 1. It will delete the shunt as it was previously described. It will be made in solidarity with the initiator by the cooperation of deformable tabs (integral with the connector and not shown) with the abutment surface 44 delimiting the circular clearance groove 45.
  • Figures 8a and 8b show an initiator following a third embodiment of the invention.
  • This mode differs from the previous mode in that the component shunt is not constituted by a separate part mounted in the cavity 40 but only by a conductive strip 58 secured to the base 16.
  • the cavity 40 of the base has a profile substantially rectangular (see Figure 8b) which is intended to receive a connector and which plays the same role as the middle notch of the component described above in reference to Figures 7a, 7b.
  • the cavity 40 carries on one of its planar faces a rib semi-cylindrical 55 and on the other flat surface a groove rectangular 56.
  • the rib and the groove are intended to cooperate with additional profiles carried by a connector so as to ensure that it is put in place with an orientation correct with respect to the pins.
  • the flat surfaces of the cavity 40 also provide guidance of the connector.
  • the conductive strip 58 is identical to that shown in Figure 7c.
  • the base can be overmolded made of plastic on the strip 58 including the bar 60 will then be embedded in the base material.
  • the strip 58 again comprises two tongues 59a, 59b interconnected by a bar 60. It provides a short circuit between pins 7a and 7b when the initiator does not not found connected to a connector.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Air Bags (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Connector Housings Or Holding Contact Members (AREA)
  • Dental Preparations (AREA)

Claims (7)

  1. Pyrotechnischer Zünder (1) mit wenigstens einer pyrotechnischen Zusammensetzung, die im Inneren eines Gehäuses (2) angeordnet ist, das aus einer im wesentlichen zylindrischen Hülle (4) besteht, die durch wenigstens zwei Kontakte (7a, 7b) verlängert ist, wobei das Gehäuse (2) im Inneren einer Hülle, die durch den Zusammenschluss eines Fußes (16) und einer Halbschale (17) gebildet wird, angeordnet ist, die Hülle weist ein äußeres Profil auf und ermöglicht deren Befestigung auf einem Gaserzeuger oder einem Pyromechanismus, der gesagte Fuß (16) umfasst eine Vertiefung (40) in deren Inneren sich die Kontakte erstrecken, indem die Vertiefung geeigneten Abmessungen besitzt und dafür vorgesehen ist, ein elektrisches oder elektronisches Bauteil und/oder einen Stecker aufzunehmen, wobei der Zünder dadurch gekennzeichnet ist, dass der gesagte Fuß (16) Löcher (20) trägt, um jeder einen der Kontakte (7a, 7b) aufnehmen.
  2. Pyrotechnischer Zünder nach Anspruch 1, dadurch gekennzeichnet, dass die Vertiefung (40) ein Shunt-Bauteil (48) trägt, das bei der Abwesenheit eines Steckers einen Kurzschluss zwischen den Kontakten (7a, 7b) gewährleistet.
  3. Pyrotechnischer Zünder nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Fuß (16) Mittel umfasst, die ein axiales Festlegen des Shunt-Bauteiles und/oder des Steckers in der Vertiefung gewährleisten.
  4. Pyrotechnischer Zünder nach irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Vertiefung (40) zylindrisch ist und wenigstens eine Kerbe (46a, 46b) aufweist, die dafür vorgesehen ist, einen Vorsprung (50a, 50b) aufzunehmen, der fest mit dem Shunt-Bauteil (48) verbunden ist und dessen Positionierung in Umfangsrichtung ermöglicht.
  5. Pyrotechnischer Zünder nach Anspruch 2, dadurch gekennzeichnet, dass das Shunt-Bauteil (48) aus einem elastischen, leitfähigen Blättchen gebildet ist, das mit dem Fuß fest verbunden ist, wobei das Blättchen einen Kurzschluss zwischen den Kontakten (7a, 7b) gewährleistet, wenn ein Stecker nicht vorhanden ist.
  6. Pyrotechnischer Zünder nach Anspruch 5, dadurch gekennzeichnet, dass der Fuß über das leitfähige Blättchen abgegossen ist.
  7. Pyrotechnischer Zünder nach irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Halbschale (17) und der Fuß (16) durch Ultraschall-Schweißung fest miteinander verbunden werden.
EP01400714A 2000-03-30 2001-03-20 Pyrotechnischer Zünder mit einem elektrischen oder elektronischen Bauelement und/oder mit einem Steckverbinder Expired - Lifetime EP1139060B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR0004085A FR2807154B3 (fr) 2000-03-30 2000-03-30 Initiateur pyrotechnique pouvant etre equipe d'un composant electrique ou electronique et/ou d'un connecteur
FR0004085 2000-03-30
FR0009886 2000-07-27
FR0009886A FR2807155B1 (fr) 2000-03-30 2000-07-27 Initiateur pyrotechnique pouvant etre equipe d'un composant electrique ou electronique et/ou d'un connecteur

Publications (2)

Publication Number Publication Date
EP1139060A1 EP1139060A1 (de) 2001-10-04
EP1139060B1 true EP1139060B1 (de) 2004-05-19

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Application Number Title Priority Date Filing Date
EP01400714A Expired - Lifetime EP1139060B1 (de) 2000-03-30 2001-03-20 Pyrotechnischer Zünder mit einem elektrischen oder elektronischen Bauelement und/oder mit einem Steckverbinder

Country Status (5)

Country Link
EP (1) EP1139060B1 (de)
AT (1) ATE267379T1 (de)
DE (1) DE60103321T2 (de)
ES (1) ES2220683T3 (de)
FR (1) FR2807155B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8960093B2 (en) 2011-04-12 2015-02-24 Dynaenergetics Gmbh & Co. Kg Igniter with a multifunctional plug

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1176384A3 (de) * 2000-07-27 2002-03-20 Giat Industries Pyrotechnischer Zünder mit einem elektrischen oder elektronischen Bauelement und/oder mit einem Steckverbinder
FR2840681A1 (fr) 2002-06-10 2003-12-12 Spria Dispositif de raccordement entre un connecteur et une embase d'un initiateur pyrotechnique
US7077428B2 (en) 2003-07-07 2006-07-18 Autoliv Asp, Inc. Airbag initiator cover attachment apparatus and method
AR074436A1 (es) * 2008-12-09 2011-01-19 Dynaenergetics Gmbh & Co Kg Detonador para aplicaciones en mineria, sismologia y campos petroliferos y procedimiento
GB2474238B (en) * 2009-10-06 2013-12-04 Heatrod Elements Ltd Improvements in and relating to thermostats
FR3022620B1 (fr) 2014-06-19 2016-06-03 Renault Sa Composant shunt et initiateur pyrotechnique associe

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4140692A1 (de) * 1991-12-10 1993-06-17 Trw Repa Gmbh Elektrische steckverbindung an einem mit elektrischem zuender versehenen pyrotechnischen gasgenerator
FR2698687B1 (fr) 1992-12-01 1995-02-03 Giat Ind Sa Initiateur pyrotechnique.
FR2720493B1 (fr) 1994-05-31 1996-07-19 Giat Ind Sa Initiateur pyrotechnique.
US5621183A (en) * 1995-01-12 1997-04-15 Trw Inc. Initiator for an air bag inflator
DE19514864A1 (de) * 1995-04-27 1996-11-07 Duerrwaechter E Dr Doduco Kurzschlußsicherung für elektrische Zünder von Airbags
US5733135A (en) * 1995-12-06 1998-03-31 Trw Inc. Air bag inflator assembly with shorting clip

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8960093B2 (en) 2011-04-12 2015-02-24 Dynaenergetics Gmbh & Co. Kg Igniter with a multifunctional plug

Also Published As

Publication number Publication date
FR2807155B1 (fr) 2003-03-21
ATE267379T1 (de) 2004-06-15
EP1139060A1 (de) 2001-10-04
DE60103321T2 (de) 2005-06-16
DE60103321D1 (de) 2004-06-24
FR2807155A1 (fr) 2001-10-05
ES2220683T3 (es) 2004-12-16

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