EP1972883B1 - Unité d'allumage pour un générateur à gaz - Google Patents

Unité d'allumage pour un générateur à gaz Download PDF

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Publication number
EP1972883B1
EP1972883B1 EP20080005351 EP08005351A EP1972883B1 EP 1972883 B1 EP1972883 B1 EP 1972883B1 EP 20080005351 EP20080005351 EP 20080005351 EP 08005351 A EP08005351 A EP 08005351A EP 1972883 B1 EP1972883 B1 EP 1972883B1
Authority
EP
European Patent Office
Prior art keywords
igniter
unit according
igniter unit
carrier
connecting lines
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.)
Active
Application number
EP20080005351
Other languages
German (de)
English (en)
Other versions
EP1972883A2 (fr
EP1972883A3 (fr
Inventor
Achim Dr. Hofmann
Horst Dr. Laucht
Helmut Pritz
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.)
ZF Airbag Germany GmbH
Original Assignee
TRW Airbag Systems 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
Priority claimed from DE102007019285A external-priority patent/DE102007019285B4/de
Application filed by TRW Airbag Systems GmbH filed Critical TRW Airbag Systems GmbH
Publication of EP1972883A2 publication Critical patent/EP1972883A2/fr
Publication of EP1972883A3 publication Critical patent/EP1972883A3/fr
Application granted granted Critical
Publication of EP1972883B1 publication Critical patent/EP1972883B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F42B3/198—Manufacture of electric initiator heads e.g., testing, machines
    • 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
    • F42B3/103—Mounting initiator heads in initiators; Sealing-plugs

Definitions

  • the invention relates to an ignition unit for a gas generator, in particular a vehicle occupant restraint system, with at least one primary charge, at least one elongate electrical connection line which is connected in the primary charge via a bridge wire to another connection line or a metallic, conductive contact, and an Anzünderhav metal having at least one opening through which at least one lead extends.
  • igniter units are known and are e.g. used in gas generators of gas bag modules whose gas bag is filled in an accident with compressed gas to protect a vehicle occupant. So that in a fire, be it during the transport of a gas bag module before installation in a vehicle or when installed, the gas generator no danger, gas generators are subjected to the so-called Bonfire test of the German Federal Institute for Materials, in which the gas generator for a long time is exposed to an elevated ambient temperature. The gas-generating material contained in the gas generator should ignite itself and burn off in a controlled manner.
  • plastic-coated igniter units the problem is that in the case of fire, the plastic at the time of ignition already melted or at least strongly softened, which is why metal parts such as the electrical leads are no longer as good as originally anchored.
  • an ignition unit is known in which the leads are designed as wires. These wires are slightly deformed above the Anzündermiks, so that there is a lying "U". This outwardly projecting, U-shaped portion is partly over the edge of the opening laterally over. The production of such bent leads, which still need to be very accurately positioned before they are overmolded, is relatively difficult.
  • the show DE 44 35 319 A1 a firing unit that DE 199 14 241 A1 an ignition device and the WO2005 / 090895 a connector.
  • the invention provides an ignition unit for a gas generator, which is characterized by low production costs and a small space and in which the metal parts remain reliably anchored in a fire.
  • the retaining projection In case of fire due to the retaining projection reliably prevents the associated connection line can escape through the opening in the Anzündermik from the gas generator.
  • the retaining projections can be realized in the existing process or possibly in a simple additional process step, which is why the ignition unit according to the invention is relatively inexpensive to produce.
  • the ignition unit according to the invention can be dispensed with a use of a high temperature resistant plastic and possibly even a Appelzündffens.
  • connection leads had no projections, because they are in the region of the U-shaped bent portion in cross section as thick as before and after the bent portion.
  • a part, ie the holding projection still has to protrude laterally from the connecting line, wherein it may also be integrally formed on the connecting line. But this retaining projection is not necessary for the electrical power supply, ie if the projection would be omitted, the connection line would not be interrupted.
  • the extension is in the lighter base, d. H. for normal operation, the extension results in an improvement in the embedment of the associated lead in the socket.
  • Each connecting line preferably has at least one retaining projection and is thus secured individually.
  • a plurality of, in particular all connecting lines extend through a common opening in the Anzündermik, and their retaining projections project beyond the edge bounding the opening laterally.
  • connection lines each have their own, their associated opening and extend through this opening.
  • the holding projections may possibly be made smaller, since the openings should also be smaller in cross-section than in the case of a common opening.
  • the leads are rectilinear, resulting in a particularly small space.
  • Straightness in this context preferably means that a straight line can be drawn through the connecting leads from one axial end to the other axial end.
  • the leads extend in the region of the holding projections in particular parallel to each other, which further simplifies the production of the ignition unit.
  • the opening in the ignition carrier is preferably closed by a seal.
  • the leads are at least partially held in a connected to the Anzünderesel Anzündersockel, resulting in a compact assembly.
  • the firing base may, as already mentioned, be made of plastic, in which case the use of a high temperature resistant plastic is not required. In this way, the production costs can be further reduced.
  • the lighter socket is formed in particular by co-extrusion of the leads and a portion containing the opening of the Anzünder umans.
  • the holding projections are integral spacers of the leads.
  • the holding projections are integral spacers of the leads. In this way, a particularly firm connection of the holding projections with the leads, which is easy to produce and is characterized by a small space requirement.
  • connection lines comprise contact pins on which the holding projections are arranged.
  • connection lines comprise bridge wire carriers on which the holding projections are arranged.
  • the holding projections can be produced by stamping, which is advantageous in particular in the case of an arrangement on the bridge wire carriers, since these are usually punched parts anyway. Thus, the retaining projections can be finished without additional effort.
  • the retaining projections may be made by embossing or upsetting. This embodiment is particularly advantageous in the case of an arrangement of the retaining projections on the contact pins and is realized in a cost-effective additional process step.
  • the igniter carrier preferably extends laterally to the outside of the igniter unit. Furthermore, in this embodiment, a stable bridge from the Anzünder whatsoever to the adjacent stable housing possible.
  • the igniter carrier projects laterally outward from the adjacent areas of the igniter unit.
  • the Anzünder forms the mounting base for mounting the ignition unit on the gas generator.
  • a stable bridge is obtained between the igniter carrier and the housing (here gas generator).
  • FIG. 1 shows an igniter unit 10 according to a first embodiment of the invention, which is used in particular in a gas generator of a vehicle occupant restraint system, as in eg FIG. 6 is shown and described later.
  • the igniter unit 10 has a spherical priming charge 14 produced in the dipping process, into which project two elongated electrical connection lines 16, which are connected to one another in the region of the primary charge 14 via a bridgewire 18.
  • the connection lines 16 comprise bridge wire carriers 20 and contact pins 22, which are welded to the bridge wire carriers 20 outside the primary charge 14.
  • an igniter carrier 24 is provided made of metal, which has an opening 26 through which the connecting lines 16, in particular their sections formed by the contact pins 22, extend therethrough.
  • a Anzündersockel 28 made of plastic, which is formed by co-extrusion of the leads 16 and a portion 26 containing the opening 30 of the Anzünder umans 24 and in which the leads 16 are at least partially held.
  • the igniter socket 28 thereby also forms a seal which closes the opening 26.
  • the igniter carrier 24 extends laterally at least as far as the outside of the igniter unit 10.
  • the igniter carrier 24 protrudes outward with respect to the adjoining regions of the igniter unit 10 and forms a mounting base for fastening the igniter unit 10 in a gas generator.
  • a secondary charge 32 bounded by a cap 34 connected to the lighter socket 28.
  • the connecting lines 16, more precisely the bridge wire carriers 20, are partially converted into flag-like triangular holding projections 38 which protrude laterally outward with respect to the extension direction E of the connecting lines 16 and extend beyond the edge 40 of the common opening 26.
  • the bridge wire carriers 20 are produced together with their holding projections 38 by punching.
  • the leads 16 are substantially rectilinear and in the region of the retaining projections 38 parallel to each other.
  • the holding projections 38 are integrally formed on the leads 16 (or here the bridge wire support 20) integrally formed spacers, which are produced in the embodiment shown together with the bridge wire girders 20 by punching.
  • the contact pins 22 have a flattened end, where they are welded or soldered to the bridge wire carrier 20.
  • FIG. 3 shows the essential parts of the ignition unit 10 according to the invention in comparison with a primer unit 10 'according to the prior art ( FIG. 2 ), in which the bridge wire carriers 20 'are formed without retaining projections 38.
  • FIG. 4 As can be seen in the embodiment according to the prior art in a fire, in which the plastic of the ignition socket 28 at the time of ignition of the primary charge 14 already melted or at least softened, the metallic leads 16 'due to the pressure building up through the opening 26th 'emerge from the igniter carrier 24' (see FIGS. 4a, 4c ).
  • the holding projections 38 abut the igniter carrier 24 laterally outside of the opening 26 and tilt in the region of the opening 26 (Fig. Fig. 4d ).
  • FIG. 5b shows the essential components of a primer unit 10 according to an alternative embodiment of the invention, wherein the same or functionally identical components carry the same reference numerals and only the differences from the previously described embodiment will be discussed below.
  • the leads 16 are formed exclusively by the contact pins 22 on which the here rectangular retaining projections 38 are arranged.
  • the holding projections 38 are integrally formed on the contact pins 22 and produced in an additional process step by embossing or upsetting.
  • the connection lines 16 have a short inwardly extending, short section, before they extend to the bridge wire 18 again linear and parallel to each other. This linear and parallel course is also below the oblique section.
  • the inclined portion creates a laterally slight offset of the portions of the leads 16 above and below the inclined portion. But this offset is much lower than that would be achieved by securing against axial passage of the leads 16 downwards.
  • the leads 16 are generally rectilinear from one end to the other, ie a straight line can be laid through each connection line 16 which does not leave it. By this straightness, the stability of the leads 16 is increased in the axial direction.
  • the retaining projections are not required for electrical power conduction. If left out, power would still be able to flow to bridgewire 18. The omission would exist, for example, in a mental separation of the laterally projecting beyond the opening edge portion.
  • FIG. 6 shows a gas generator 42, in the center of the ignition unit 10 (here in particular in the embodiment according to FIG. 5b ) is arranged.
  • the cap 34 surrounding the secondary charge 32 adjoins a booster charge chamber 44 filled with booster charge, and a sleeve 46 defining the booster charge chamber 44 and having a plurality of overflow openings 48 is mounted on the lighter unit 10 and the lighter base 28, respectively.
  • the booster charge chamber 44 is surrounded by a combustion chamber 50, which is filled with a schematically shown fuel 52 in tablet form and the outside of a filter 54 adjacent.
  • the gas generator 42 is bounded by a housing 56 which has on its peripheral wall a plurality of outflow openings 58, which are protected in the installed state by a Dämämmfolie 60 from moisture.
  • the Anzünderpossesses 24 forms here a part of the housing 56 of the gas generator 42, namely its bottom plate.
  • a gas is generated in a known manner, which passes through the outflow openings 58 to the outside and serves, for example, to fill a gas bag of a vehicle occupant restraint system.
  • each lead 16 has its own opening 26 through which the corresponding associated lead 16 extends therethrough.
  • Each lead 16 has a retaining projection 38, which may be made or designed accordingly, as also described with reference to the preceding figures.
  • Each individual connection line 16 can not pass through its opening 26 after ignition due to its associated retaining projection 38, since the retaining projections project beyond the edge of its associated opening 26.
  • the leads 16 in the region of the ignition base 28 and the igniter carrier 24 are rectilinear and parallel to each other.
  • more than two leads 24 may be provided and extend through a common or single apertures 26.
  • only one connecting line 24 could extend through the opening 26, whereas the other, for example, touches the metal Anzünderhav 24 as ground contact (see broken lines in Fig. 7 on the right retaining projection 38) and ends at the top of the Anzünderpossessess 24, so does not project into the opening 26.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Air Bags (AREA)
  • Automotive Seat Belt Assembly (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)

Claims (17)

  1. Système d'allumage pour générateur de gaz (42), en particulier pour un système de retenue des occupants d'un véhicule, avec
    au moins une charge primaire (14),
    au moins une broche de connection électrique (16), qui est reliée dans la zone du primaire (14) via un pont métallique (18) avec un autre connecteur (16) ou est relié à un contact conducteur métallique et
    un support allumeur (24) métallique, qui possède au moins une ouverture (26), à travers laquelle passe au moins un connecteur (16),
    caractérisé en ce que au moins un connecteur (16) possède un système de retenue (38) situé entre la charge primaire (14) et le support-allumeur (24), celui-ci est saillant latéralement vers l'extérieur par rapport à la direction d'extension (E) du connecteur associé (16) et possède une pointe (40) s'étendant au delà de l'ouverture associée (26) et que les connecteurs (16) sont maintenus au moins partiellement dans l'un des supports-allumeurs au moyen d'une embase (28), et que l'embase (28) est réalisée par injection dans au moins une des ouvertures (26) dans l'ensemble formé par les connecteurs (16) et le volume intérieur (30) du support-allumeur (24).
  2. Système d'allumage selon la revendication 1, dans lequel chaque connecteur (16) possède au moins un système de retenue.
  3. Système d'allumage selon la revendication 1 ou 2, caractérisé en ce que chaque connecteur (16) possède sa propre ouverture associée (26), au travers de laquelle il passe.
  4. Système d'allumage selon la revendication 1 ou 2, caractérisé en ce qu'une pluralité de connecteurs (16) passe par une ouverture commune (26).
  5. Système d'allumage selon l'une des revendications précédentes, caractérisé en ce que les connecteurs (16) sont rectilignes.
  6. Système d'allumage selon l'une des revendications précédentes, caractérisé en ce que les connecteurs (16) sont parallèles entre eux dans la zone du système de retenue (38).
  7. Système d'allumage selon l'une des revendications précédentes, caractérisé en ce qu'une ouverture (26) au moins est fermée par un joint dans le support-allumeur (24).
  8. Système d'allumage selon l'une des revendications précédentes, caractérisé en ce que les systèmes de retenue (38) sont faits d'une seule pièce avec les connecteurs (16) par élargissement.
  9. Système d'allumage selon l'une des revendications précédentes, caractérisé en ce que les connecteurs (16) comprennent des broches (22), sur lesquelles les systèmes de retenue (38) sont disposées.
  10. Système d'allumage selon l'une des revendications 1 à 8, caractérisé en ce que les connecteurs (16) comprennent le support de pont métallique (20), sur lequel les systèmes de retenue (38) sont disposées.
  11. Système d'allumage selon l'une des revendications précédentes, caractérisé en ce que les systèmes de retenue (38) sont obtenus par poinçonnage.
  12. Système d'allumage selon l'une des revendications précédentes, caractérisé en ce que les systèmes de retenue (38) sont obtenus par gaufrage ou par compression.
  13. Système d'allumage selon l'une des revendications précédentes, caractérisé en ce que le support-allumeur (24) s'étend latéralement jusqu'au côté extérieur du système d'allumage (10).
  14. Système d'allumage selon au moins l'une des revendications précédentes, caractérisé en ce que le support-allumeur (24) dépasse latéralement et vers l'extérieur les zones adjacentes du système d'allumage (10).
  15. Système d'allumage selon l'une des revendications précédentes, caractérisé en ce que le support-allumeur (24) présente une base de montage pour la fixation du système d'allumage (10) au générateur de gaz (42).
  16. Système d'allumage selon l'une des revendications précédentes, caractérisé en ce que le support-allumeur (24) tient sur la base du générateur de gaz (42).
  17. Générateur de gaz (42) pour un système de retenue des occupants d'un véhicule caractérisée en ce que le système d'allumage (10) est selon au moins l'une des revendications précédentes.
EP20080005351 2007-03-21 2008-03-20 Unité d'allumage pour un générateur à gaz Active EP1972883B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007013532 2007-03-21
DE102007019285A DE102007019285B4 (de) 2007-03-21 2007-04-24 Anzündereinheit für einen Gasgenerator

Publications (3)

Publication Number Publication Date
EP1972883A2 EP1972883A2 (fr) 2008-09-24
EP1972883A3 EP1972883A3 (fr) 2010-04-28
EP1972883B1 true EP1972883B1 (fr) 2012-05-16

Family

ID=39472674

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20080005351 Active EP1972883B1 (fr) 2007-03-21 2008-03-20 Unité d'allumage pour un générateur à gaz

Country Status (1)

Country Link
EP (1) EP1972883B1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4435319A1 (de) * 1994-10-01 1996-04-04 Temic Bayern Chem Airbag Gmbh Anzündeinheit für einen Gasgenerator eines passiven Rückhaltesystems
DE19914241A1 (de) * 1999-03-29 2000-10-05 Nico Pyrotechnik Zündeinrichtung für eine Insassenschutzvorrichtung eines Kraftfahrzeuges
AU2003252223A1 (en) * 2002-07-19 2004-02-23 Nippon Kayaku Kabushiki Kaisha Gas generator
CN1934406B (zh) * 2004-03-18 2011-06-08 澳瑞凯炸药技术有限公司 电子雷管连接器

Also Published As

Publication number Publication date
EP1972883A2 (fr) 2008-09-24
EP1972883A3 (fr) 2010-04-28

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